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gtk/gsk/gskrendernodeimpl.c
Benjamin Otte 95865cb1bf gsk: Fix clipping error when drawing shadows 
When shadows were offset - in particular when offset so the original
source was out of bounds of the result - the drawing code would create a
pattern for it that didn't include enough of it to compose a shadow.

Fix that by not creating those patterns anymore, but instead drawing the
source (potentially multiple times) at the required offsets.

While that does more drawing, it simplifies the shadow node draw code,
and that's the primary goal of the Cairo rendering.

Test included.
2023-09-18 07:53:03 +02:00

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/* GSK - The GTK Scene Kit
*
* Copyright 2016 Endless
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include "gskrendernodeprivate.h"
#include "gskcairoblurprivate.h"
#include "gskcairorenderer.h"
#include "gskdebugprivate.h"
#include "gskdiffprivate.h"
#include "gl/gskglrenderer.h"
#include "gskpathprivate.h"
#include "gskrectprivate.h"
#include "gskrendererprivate.h"
#include "gskroundedrectprivate.h"
#include "gskstrokeprivate.h"
#include "gsktransformprivate.h"
#include "gdk/gdktextureprivate.h"
#include "gdk/gdkmemoryformatprivate.h"
#include "gdk/gdkprivate.h"
#include "gdk/gdkrectangleprivate.h"
#include <cairo.h>
#ifdef CAIRO_HAS_SVG_SURFACE
#include <cairo-svg.h>
#endif
#include <hb-ot.h>
/* maximal number of rectangles we keep in a diff region before we throw
* the towel and just use the bounding box of the parent node.
* Meant to avoid performance corner cases.
*/
#define MAX_RECTS_IN_DIFF 30
static inline void
gsk_cairo_rectangle (cairo_t *cr,
const graphene_rect_t *rect)
{
cairo_rectangle (cr,
rect->origin.x, rect->origin.y,
rect->size.width, rect->size.height);
}
static void
rectangle_init_from_graphene (cairo_rectangle_int_t *cairo,
const graphene_rect_t *graphene)
{
cairo->x = floorf (graphene->origin.x);
cairo->y = floorf (graphene->origin.y);
cairo->width = ceilf (graphene->origin.x + graphene->size.width) - cairo->x;
cairo->height = ceilf (graphene->origin.y + graphene->size.height) - cairo->y;
}
static void
_graphene_rect_init_from_clip_extents (graphene_rect_t *rect,
cairo_t *cr)
{
double x1c, y1c, x2c, y2c;
cairo_clip_extents (cr, &x1c, &y1c, &x2c, &y2c);
graphene_rect_init (rect, x1c, y1c, x2c - x1c, y2c - y1c);
}
static void
region_union_region_affine (cairo_region_t *region,
const cairo_region_t *sub,
float scale_x,
float scale_y,
float offset_x,
float offset_y)
{
cairo_rectangle_int_t rect;
int i;
for (i = 0; i < cairo_region_num_rectangles (sub); i++)
{
cairo_region_get_rectangle (sub, i, &rect);
gdk_rectangle_transform_affine (&rect, scale_x, scale_y, offset_x, offset_y, &rect);
cairo_region_union_rectangle (region, &rect);
}
}
/* {{{ GSK_COLOR_NODE */
/**
* GskColorNode:
*
* A render node for a solid color.
*/
struct _GskColorNode
{
GskRenderNode render_node;
GdkRGBA color;
};
static void
gsk_color_node_draw (GskRenderNode *node,
cairo_t *cr)
{
GskColorNode *self = (GskColorNode *) node;
gdk_cairo_set_source_rgba (cr, &self->color);
gsk_cairo_rectangle (cr, &node->bounds);
cairo_fill (cr);
}
static void
gsk_color_node_diff (GskRenderNode *node1,
GskRenderNode *node2,
cairo_region_t *region)
{
GskColorNode *self1 = (GskColorNode *) node1;
GskColorNode *self2 = (GskColorNode *) node2;
if (graphene_rect_equal (&node1->bounds, &node2->bounds) &&
gdk_rgba_equal (&self1->color, &self2->color))
return;
gsk_render_node_diff_impossible (node1, node2, region);
}
static void
gsk_color_node_class_init (gpointer g_class,
gpointer class_data)
{
GskRenderNodeClass *node_class = g_class;
node_class->node_type = GSK_COLOR_NODE;
node_class->draw = gsk_color_node_draw;
node_class->diff = gsk_color_node_diff;
}
/**
* gsk_color_node_get_color:
* @node: (type GskColorNode): a `GskRenderNode`
*
* Retrieves the color of the given @node.
*
* Returns: (transfer none): the color of the node
*/
const GdkRGBA *
gsk_color_node_get_color (const GskRenderNode *node)
{
GskColorNode *self = (GskColorNode *) node;
g_return_val_if_fail (GSK_IS_RENDER_NODE_TYPE (node, GSK_COLOR_NODE), NULL);
return &self->color;
}
/**
* gsk_color_node_new:
* @rgba: a `GdkRGBA` specifying a color
* @bounds: the rectangle to render the color into
*
* Creates a `GskRenderNode` that will render the color specified by @rgba into
* the area given by @bounds.
*
* Returns: (transfer full) (type GskColorNode): A new `GskRenderNode`
*/
GskRenderNode *
gsk_color_node_new (const GdkRGBA *rgba,
const graphene_rect_t *bounds)
{
GskColorNode *self;
GskRenderNode *node;
g_return_val_if_fail (rgba != NULL, NULL);
g_return_val_if_fail (bounds != NULL, NULL);
self = gsk_render_node_alloc (GSK_COLOR_NODE);
node = (GskRenderNode *) self;
node->offscreen_for_opacity = FALSE;
self->color = *rgba;
graphene_rect_init_from_rect (&node->bounds, bounds);
return node;
}
/* }}} */
/* {{{ GSK_LINEAR_GRADIENT_NODE */
/**
* GskRepeatingLinearGradientNode:
*
* A render node for a repeating linear gradient.
*/
/**
* GskLinearGradientNode:
*
* A render node for a linear gradient.
*/
struct _GskLinearGradientNode
{
GskRenderNode render_node;
graphene_point_t start;
graphene_point_t end;
gsize n_stops;
GskColorStop *stops;
};
static void
gsk_linear_gradient_node_finalize (GskRenderNode *node)
{
GskLinearGradientNode *self = (GskLinearGradientNode *) node;
GskRenderNodeClass *parent_class = g_type_class_peek (g_type_parent (GSK_TYPE_LINEAR_GRADIENT_NODE));
g_free (self->stops);
parent_class->finalize (node);
}
static void
gsk_linear_gradient_node_draw (GskRenderNode *node,
cairo_t *cr)
{
GskLinearGradientNode *self = (GskLinearGradientNode *) node;
cairo_pattern_t *pattern;
gsize i;
pattern = cairo_pattern_create_linear (self->start.x, self->start.y,
self->end.x, self->end.y);
if (gsk_render_node_get_node_type (node) == GSK_REPEATING_LINEAR_GRADIENT_NODE)
cairo_pattern_set_extend (pattern, CAIRO_EXTEND_REPEAT);
if (self->stops[0].offset > 0.0)
cairo_pattern_add_color_stop_rgba (pattern,
0.0,
self->stops[0].color.red,
self->stops[0].color.green,
self->stops[0].color.blue,
self->stops[0].color.alpha);
for (i = 0; i < self->n_stops; i++)
{
cairo_pattern_add_color_stop_rgba (pattern,
self->stops[i].offset,
self->stops[i].color.red,
self->stops[i].color.green,
self->stops[i].color.blue,
self->stops[i].color.alpha);
}
if (self->stops[self->n_stops-1].offset < 1.0)
cairo_pattern_add_color_stop_rgba (pattern,
1.0,
self->stops[self->n_stops-1].color.red,
self->stops[self->n_stops-1].color.green,
self->stops[self->n_stops-1].color.blue,
self->stops[self->n_stops-1].color.alpha);
cairo_set_source (cr, pattern);
cairo_pattern_destroy (pattern);
gsk_cairo_rectangle (cr, &node->bounds);
cairo_fill (cr);
}
static void
gsk_linear_gradient_node_diff (GskRenderNode *node1,
GskRenderNode *node2,
cairo_region_t *region)
{
GskLinearGradientNode *self1 = (GskLinearGradientNode *) node1;
GskLinearGradientNode *self2 = (GskLinearGradientNode *) node2;
if (graphene_point_equal (&self1->start, &self2->start) &&
graphene_point_equal (&self1->end, &self2->end) &&
self1->n_stops == self2->n_stops)
{
gsize i;
for (i = 0; i < self1->n_stops; i++)
{
GskColorStop *stop1 = &self1->stops[i];
GskColorStop *stop2 = &self2->stops[i];
if (stop1->offset == stop2->offset &&
gdk_rgba_equal (&stop1->color, &stop2->color))
continue;
gsk_render_node_diff_impossible (node1, node2, region);
return;
}
return;
}
gsk_render_node_diff_impossible (node1, node2, region);
}
static void
gsk_linear_gradient_node_class_init (gpointer g_class,
gpointer class_data)
{
GskRenderNodeClass *node_class = g_class;
node_class->node_type = GSK_LINEAR_GRADIENT_NODE;
node_class->finalize = gsk_linear_gradient_node_finalize;
node_class->draw = gsk_linear_gradient_node_draw;
node_class->diff = gsk_linear_gradient_node_diff;
}
static void
gsk_repeating_linear_gradient_node_class_init (gpointer g_class,
gpointer class_data)
{
GskRenderNodeClass *node_class = g_class;
node_class->node_type = GSK_REPEATING_LINEAR_GRADIENT_NODE;
node_class->finalize = gsk_linear_gradient_node_finalize;
node_class->draw = gsk_linear_gradient_node_draw;
node_class->diff = gsk_linear_gradient_node_diff;
}
/**
* gsk_linear_gradient_node_new:
* @bounds: the rectangle to render the linear gradient into
* @start: the point at which the linear gradient will begin
* @end: the point at which the linear gradient will finish
* @color_stops: (array length=n_color_stops): a pointer to an array of
* `GskColorStop` defining the gradient. The offsets of all color stops
* must be increasing. The first stop's offset must be >= 0 and the last
* stop's offset must be <= 1.
* @n_color_stops: the number of elements in @color_stops
*
* Creates a `GskRenderNode` that will create a linear gradient from the given
* points and color stops, and render that into the area given by @bounds.
*
* Returns: (transfer full) (type GskLinearGradientNode): A new `GskRenderNode`
*/
GskRenderNode *
gsk_linear_gradient_node_new (const graphene_rect_t *bounds,
const graphene_point_t *start,
const graphene_point_t *end,
const GskColorStop *color_stops,
gsize n_color_stops)
{
GskLinearGradientNode *self;
GskRenderNode *node;
gsize i;
g_return_val_if_fail (bounds != NULL, NULL);
g_return_val_if_fail (start != NULL, NULL);
g_return_val_if_fail (end != NULL, NULL);
g_return_val_if_fail (color_stops != NULL, NULL);
g_return_val_if_fail (n_color_stops >= 2, NULL);
g_return_val_if_fail (color_stops[0].offset >= 0, NULL);
for (i = 1; i < n_color_stops; i++)
g_return_val_if_fail (color_stops[i].offset >= color_stops[i - 1].offset, NULL);
g_return_val_if_fail (color_stops[n_color_stops - 1].offset <= 1, NULL);
self = gsk_render_node_alloc (GSK_LINEAR_GRADIENT_NODE);
node = (GskRenderNode *) self;
node->offscreen_for_opacity = FALSE;
graphene_rect_init_from_rect (&node->bounds, bounds);
graphene_point_init_from_point (&self->start, start);
graphene_point_init_from_point (&self->end, end);
self->n_stops = n_color_stops;
self->stops = g_malloc_n (n_color_stops, sizeof (GskColorStop));
memcpy (self->stops, color_stops, n_color_stops * sizeof (GskColorStop));
return node;
}
/**
* gsk_repeating_linear_gradient_node_new:
* @bounds: the rectangle to render the linear gradient into
* @start: the point at which the linear gradient will begin
* @end: the point at which the linear gradient will finish
* @color_stops: (array length=n_color_stops): a pointer to an array of
* `GskColorStop` defining the gradient. The offsets of all color stops
* must be increasing. The first stop's offset must be >= 0 and the last
* stop's offset must be <= 1.
* @n_color_stops: the number of elements in @color_stops
*
* Creates a `GskRenderNode` that will create a repeating linear gradient
* from the given points and color stops, and render that into the area
* given by @bounds.
*
* Returns: (transfer full) (type GskRepeatingLinearGradientNode): A new `GskRenderNode`
*/
GskRenderNode *
gsk_repeating_linear_gradient_node_new (const graphene_rect_t *bounds,
const graphene_point_t *start,
const graphene_point_t *end,
const GskColorStop *color_stops,
gsize n_color_stops)
{
GskLinearGradientNode *self;
GskRenderNode *node;
gsize i;
g_return_val_if_fail (bounds != NULL, NULL);
g_return_val_if_fail (start != NULL, NULL);
g_return_val_if_fail (end != NULL, NULL);
g_return_val_if_fail (color_stops != NULL, NULL);
g_return_val_if_fail (n_color_stops >= 2, NULL);
g_return_val_if_fail (color_stops[0].offset >= 0, NULL);
for (i = 1; i < n_color_stops; i++)
g_return_val_if_fail (color_stops[i].offset >= color_stops[i - 1].offset, NULL);
g_return_val_if_fail (color_stops[n_color_stops - 1].offset <= 1, NULL);
self = gsk_render_node_alloc (GSK_REPEATING_LINEAR_GRADIENT_NODE);
node = (GskRenderNode *) self;
node->offscreen_for_opacity = FALSE;
graphene_rect_init_from_rect (&node->bounds, bounds);
graphene_point_init_from_point (&self->start, start);
graphene_point_init_from_point (&self->end, end);
self->stops = g_malloc_n (n_color_stops, sizeof (GskColorStop));
memcpy (self->stops, color_stops, n_color_stops * sizeof (GskColorStop));
self->n_stops = n_color_stops;
return node;
}
/**
* gsk_linear_gradient_node_get_start:
* @node: (type GskLinearGradientNode): a `GskRenderNode` for a linear gradient
*
* Retrieves the initial point of the linear gradient.
*
* Returns: (transfer none): the initial point
*/
const graphene_point_t *
gsk_linear_gradient_node_get_start (const GskRenderNode *node)
{
const GskLinearGradientNode *self = (const GskLinearGradientNode *) node;
return &self->start;
}
/**
* gsk_linear_gradient_node_get_end:
* @node: (type GskLinearGradientNode): a `GskRenderNode` for a linear gradient
*
* Retrieves the final point of the linear gradient.
*
* Returns: (transfer none): the final point
*/
const graphene_point_t *
gsk_linear_gradient_node_get_end (const GskRenderNode *node)
{
const GskLinearGradientNode *self = (const GskLinearGradientNode *) node;
return &self->end;
}
/**
* gsk_linear_gradient_node_get_n_color_stops:
* @node: (type GskLinearGradientNode): a `GskRenderNode` for a linear gradient
*
* Retrieves the number of color stops in the gradient.
*
* Returns: the number of color stops
*/
gsize
gsk_linear_gradient_node_get_n_color_stops (const GskRenderNode *node)
{
const GskLinearGradientNode *self = (const GskLinearGradientNode *) node;
return self->n_stops;
}
/**
* gsk_linear_gradient_node_get_color_stops:
* @node: (type GskLinearGradientNode): a `GskRenderNode` for a linear gradient
* @n_stops: (out) (optional): the number of color stops in the returned array
*
* Retrieves the color stops in the gradient.
*
* Returns: (array length=n_stops): the color stops in the gradient
*/
const GskColorStop *
gsk_linear_gradient_node_get_color_stops (const GskRenderNode *node,
gsize *n_stops)
{
const GskLinearGradientNode *self = (const GskLinearGradientNode *) node;
if (n_stops != NULL)
*n_stops = self->n_stops;
return self->stops;
}
/* }}} */
/* {{{ GSK_RADIAL_GRADIENT_NODE */
/**
* GskRepeatingRadialGradientNode:
*
* A render node for a repeating radial gradient.
*/
/**
* GskRadialGradientNode:
*
* A render node for a radial gradient.
*/
struct _GskRadialGradientNode
{
GskRenderNode render_node;
graphene_point_t center;
float hradius;
float vradius;
float start;
float end;
gsize n_stops;
GskColorStop *stops;
};
static void
gsk_radial_gradient_node_finalize (GskRenderNode *node)
{
GskRadialGradientNode *self = (GskRadialGradientNode *) node;
GskRenderNodeClass *parent_class = g_type_class_peek (g_type_parent (GSK_TYPE_RADIAL_GRADIENT_NODE));
g_free (self->stops);
parent_class->finalize (node);
}
static void
gsk_radial_gradient_node_draw (GskRenderNode *node,
cairo_t *cr)
{
GskRadialGradientNode *self = (GskRadialGradientNode *) node;
cairo_pattern_t *pattern;
gsize i;
pattern = cairo_pattern_create_radial (0, 0, self->hradius * self->start,
0, 0, self->hradius * self->end);
if (self->hradius != self->vradius)
{
cairo_matrix_t matrix;
cairo_matrix_init_scale (&matrix, 1.0, self->hradius / self->vradius);
cairo_pattern_set_matrix (pattern, &matrix);
}
if (gsk_render_node_get_node_type (node) == GSK_REPEATING_RADIAL_GRADIENT_NODE)
cairo_pattern_set_extend (pattern, CAIRO_EXTEND_REPEAT);
else
cairo_pattern_set_extend (pattern, CAIRO_EXTEND_PAD);
if (self->stops[0].offset > 0.0)
cairo_pattern_add_color_stop_rgba (pattern,
0.0,
self->stops[0].color.red,
self->stops[0].color.green,
self->stops[0].color.blue,
self->stops[0].color.alpha);
for (i = 0; i < self->n_stops; i++)
{
cairo_pattern_add_color_stop_rgba (pattern,
self->stops[i].offset,
self->stops[i].color.red,
self->stops[i].color.green,
self->stops[i].color.blue,
self->stops[i].color.alpha);
}
if (self->stops[self->n_stops-1].offset < 1.0)
cairo_pattern_add_color_stop_rgba (pattern,
1.0,
self->stops[self->n_stops-1].color.red,
self->stops[self->n_stops-1].color.green,
self->stops[self->n_stops-1].color.blue,
self->stops[self->n_stops-1].color.alpha);
gsk_cairo_rectangle (cr, &node->bounds);
cairo_translate (cr, self->center.x, self->center.y);
cairo_set_source (cr, pattern);
cairo_fill (cr);
cairo_pattern_destroy (pattern);
}
static void
gsk_radial_gradient_node_diff (GskRenderNode *node1,
GskRenderNode *node2,
cairo_region_t *region)
{
GskRadialGradientNode *self1 = (GskRadialGradientNode *) node1;
GskRadialGradientNode *self2 = (GskRadialGradientNode *) node2;
if (graphene_point_equal (&self1->center, &self2->center) &&
self1->hradius == self2->hradius &&
self1->vradius == self2->vradius &&
self1->start == self2->start &&
self1->end == self2->end &&
self1->n_stops == self2->n_stops)
{
gsize i;
for (i = 0; i < self1->n_stops; i++)
{
GskColorStop *stop1 = &self1->stops[i];
GskColorStop *stop2 = &self2->stops[i];
if (stop1->offset == stop2->offset &&
gdk_rgba_equal (&stop1->color, &stop2->color))
continue;
gsk_render_node_diff_impossible (node1, node2, region);
return;
}
return;
}
gsk_render_node_diff_impossible (node1, node2, region);
}
static void
gsk_radial_gradient_node_class_init (gpointer g_class,
gpointer class_data)
{
GskRenderNodeClass *node_class = g_class;
node_class->node_type = GSK_RADIAL_GRADIENT_NODE;
node_class->finalize = gsk_radial_gradient_node_finalize;
node_class->draw = gsk_radial_gradient_node_draw;
node_class->diff = gsk_radial_gradient_node_diff;
}
static void
gsk_repeating_radial_gradient_node_class_init (gpointer g_class,
gpointer class_data)
{
GskRenderNodeClass *node_class = g_class;
node_class->node_type = GSK_REPEATING_RADIAL_GRADIENT_NODE;
node_class->finalize = gsk_radial_gradient_node_finalize;
node_class->draw = gsk_radial_gradient_node_draw;
node_class->diff = gsk_radial_gradient_node_diff;
}
/**
* gsk_radial_gradient_node_new:
* @bounds: the bounds of the node
* @center: the center of the gradient
* @hradius: the horizontal radius
* @vradius: the vertical radius
* @start: a percentage >= 0 that defines the start of the gradient around @center
* @end: a percentage >= 0 that defines the end of the gradient around @center
* @color_stops: (array length=n_color_stops): a pointer to an array of
* `GskColorStop` defining the gradient. The offsets of all color stops
* must be increasing. The first stop's offset must be >= 0 and the last
* stop's offset must be <= 1.
* @n_color_stops: the number of elements in @color_stops
*
* Creates a `GskRenderNode` that draws a radial gradient.
*
* The radial gradient
* starts around @center. The size of the gradient is dictated by @hradius
* in horizontal orientation and by @vradius in vertical orientation.
*
* Returns: (transfer full) (type GskRadialGradientNode): A new `GskRenderNode`
*/
GskRenderNode *
gsk_radial_gradient_node_new (const graphene_rect_t *bounds,
const graphene_point_t *center,
float hradius,
float vradius,
float start,
float end,
const GskColorStop *color_stops,
gsize n_color_stops)
{
GskRadialGradientNode *self;
GskRenderNode *node;
gsize i;
g_return_val_if_fail (bounds != NULL, NULL);
g_return_val_if_fail (center != NULL, NULL);
g_return_val_if_fail (hradius > 0., NULL);
g_return_val_if_fail (vradius > 0., NULL);
g_return_val_if_fail (start >= 0., NULL);
g_return_val_if_fail (end >= 0., NULL);
g_return_val_if_fail (end > start, NULL);
g_return_val_if_fail (color_stops != NULL, NULL);
g_return_val_if_fail (n_color_stops >= 2, NULL);
g_return_val_if_fail (color_stops[0].offset >= 0, NULL);
for (i = 1; i < n_color_stops; i++)
g_return_val_if_fail (color_stops[i].offset >= color_stops[i - 1].offset, NULL);
g_return_val_if_fail (color_stops[n_color_stops - 1].offset <= 1, NULL);
self = gsk_render_node_alloc (GSK_RADIAL_GRADIENT_NODE);
node = (GskRenderNode *) self;
node->offscreen_for_opacity = FALSE;
graphene_rect_init_from_rect (&node->bounds, bounds);
graphene_point_init_from_point (&self->center, center);
self->hradius = hradius;
self->vradius = vradius;
self->start = start;
self->end = end;
self->n_stops = n_color_stops;
self->stops = g_malloc_n (n_color_stops, sizeof (GskColorStop));
memcpy (self->stops, color_stops, n_color_stops * sizeof (GskColorStop));
return node;
}
/**
* gsk_repeating_radial_gradient_node_new:
* @bounds: the bounds of the node
* @center: the center of the gradient
* @hradius: the horizontal radius
* @vradius: the vertical radius
* @start: a percentage >= 0 that defines the start of the gradient around @center
* @end: a percentage >= 0 that defines the end of the gradient around @center
* @color_stops: (array length=n_color_stops): a pointer to an array of
* `GskColorStop` defining the gradient. The offsets of all color stops
* must be increasing. The first stop's offset must be >= 0 and the last
* stop's offset must be <= 1.
* @n_color_stops: the number of elements in @color_stops
*
* Creates a `GskRenderNode` that draws a repeating radial gradient.
*
* The radial gradient starts around @center. The size of the gradient
* is dictated by @hradius in horizontal orientation and by @vradius
* in vertical orientation.
*
* Returns: (transfer full) (type GskRepeatingRadialGradientNode): A new `GskRenderNode`
*/
GskRenderNode *
gsk_repeating_radial_gradient_node_new (const graphene_rect_t *bounds,
const graphene_point_t *center,
float hradius,
float vradius,
float start,
float end,
const GskColorStop *color_stops,
gsize n_color_stops)
{
GskRadialGradientNode *self;
GskRenderNode *node;
gsize i;
g_return_val_if_fail (bounds != NULL, NULL);
g_return_val_if_fail (center != NULL, NULL);
g_return_val_if_fail (hradius > 0., NULL);
g_return_val_if_fail (vradius > 0., NULL);
g_return_val_if_fail (start >= 0., NULL);
g_return_val_if_fail (end >= 0., NULL);
g_return_val_if_fail (end > start, NULL);
g_return_val_if_fail (color_stops != NULL, NULL);
g_return_val_if_fail (n_color_stops >= 2, NULL);
g_return_val_if_fail (color_stops[0].offset >= 0, NULL);
for (i = 1; i < n_color_stops; i++)
g_return_val_if_fail (color_stops[i].offset >= color_stops[i - 1].offset, NULL);
g_return_val_if_fail (color_stops[n_color_stops - 1].offset <= 1, NULL);
self = gsk_render_node_alloc (GSK_REPEATING_RADIAL_GRADIENT_NODE);
node = (GskRenderNode *) self;
node->offscreen_for_opacity = FALSE;
graphene_rect_init_from_rect (&node->bounds, bounds);
graphene_point_init_from_point (&self->center, center);
self->hradius = hradius;
self->vradius = vradius;
self->start = start;
self->end = end;
self->n_stops = n_color_stops;
self->stops = g_malloc_n (n_color_stops, sizeof (GskColorStop));
memcpy (self->stops, color_stops, n_color_stops * sizeof (GskColorStop));
return node;
}
/**
* gsk_radial_gradient_node_get_n_color_stops:
* @node: (type GskRadialGradientNode): a `GskRenderNode` for a radial gradient
*
* Retrieves the number of color stops in the gradient.
*
* Returns: the number of color stops
*/
gsize
gsk_radial_gradient_node_get_n_color_stops (const GskRenderNode *node)
{
const GskRadialGradientNode *self = (const GskRadialGradientNode *) node;
return self->n_stops;
}
/**
* gsk_radial_gradient_node_get_color_stops:
* @node: (type GskRadialGradientNode): a `GskRenderNode` for a radial gradient
* @n_stops: (out) (optional): the number of color stops in the returned array
*
* Retrieves the color stops in the gradient.
*
* Returns: (array length=n_stops): the color stops in the gradient
*/
const GskColorStop *
gsk_radial_gradient_node_get_color_stops (const GskRenderNode *node,
gsize *n_stops)
{
const GskRadialGradientNode *self = (const GskRadialGradientNode *) node;
if (n_stops != NULL)
*n_stops = self->n_stops;
return self->stops;
}
/**
* gsk_radial_gradient_node_get_center:
* @node: (type GskRadialGradientNode): a `GskRenderNode` for a radial gradient
*
* Retrieves the center pointer for the gradient.
*
* Returns: the center point for the gradient
*/
const graphene_point_t *
gsk_radial_gradient_node_get_center (const GskRenderNode *node)
{
const GskRadialGradientNode *self = (const GskRadialGradientNode *) node;
return &self->center;
}
/**
* gsk_radial_gradient_node_get_hradius:
* @node: (type GskRadialGradientNode): a `GskRenderNode` for a radial gradient
*
* Retrieves the horizontal radius for the gradient.
*
* Returns: the horizontal radius for the gradient
*/
float
gsk_radial_gradient_node_get_hradius (const GskRenderNode *node)
{
const GskRadialGradientNode *self = (const GskRadialGradientNode *) node;
return self->hradius;
}
/**
* gsk_radial_gradient_node_get_vradius:
* @node: (type GskRadialGradientNode): a `GskRenderNode` for a radial gradient
*
* Retrieves the vertical radius for the gradient.
*
* Returns: the vertical radius for the gradient
*/
float
gsk_radial_gradient_node_get_vradius (const GskRenderNode *node)
{
const GskRadialGradientNode *self = (const GskRadialGradientNode *) node;
return self->vradius;
}
/**
* gsk_radial_gradient_node_get_start:
* @node: (type GskRadialGradientNode): a `GskRenderNode` for a radial gradient
*
* Retrieves the start value for the gradient.
*
* Returns: the start value for the gradient
*/
float
gsk_radial_gradient_node_get_start (const GskRenderNode *node)
{
const GskRadialGradientNode *self = (const GskRadialGradientNode *) node;
return self->start;
}
/**
* gsk_radial_gradient_node_get_end:
* @node: (type GskRadialGradientNode): a `GskRenderNode` for a radial gradient
*
* Retrieves the end value for the gradient.
*
* Returns: the end value for the gradient
*/
float
gsk_radial_gradient_node_get_end (const GskRenderNode *node)
{
const GskRadialGradientNode *self = (const GskRadialGradientNode *) node;
return self->end;
}
/* }}} */
/* {{{ GSK_CONIC_GRADIENT_NODE */
/**
* GskConicGradientNode:
*
* A render node for a conic gradient.
*/
struct _GskConicGradientNode
{
GskRenderNode render_node;
graphene_point_t center;
float rotation;
float angle;
gsize n_stops;
GskColorStop *stops;
};
static void
gsk_conic_gradient_node_finalize (GskRenderNode *node)
{
GskConicGradientNode *self = (GskConicGradientNode *) node;
GskRenderNodeClass *parent_class = g_type_class_peek (g_type_parent (GSK_TYPE_CONIC_GRADIENT_NODE));
g_free (self->stops);
parent_class->finalize (node);
}
#define DEG_TO_RAD(x) ((x) * (G_PI / 180.f))
static void
_cairo_mesh_pattern_set_corner_rgba (cairo_pattern_t *pattern,
guint corner_num,
const GdkRGBA *rgba)
{
cairo_mesh_pattern_set_corner_color_rgba (pattern, corner_num, rgba->red, rgba->green, rgba->blue, rgba->alpha);
}
static void
project (double angle,
double radius,
double *x_out,
double *y_out)
{
double x, y;
#ifdef HAVE_SINCOS
sincos (angle, &y, &x);
#else
x = cos (angle);
y = sin (angle);
#endif
*x_out = radius * x;
*y_out = radius * y;
}
static void
gsk_conic_gradient_node_add_patch (cairo_pattern_t *pattern,
float radius,
float start_angle,
const GdkRGBA *start_color,
float end_angle,
const GdkRGBA *end_color)
{
double x, y;
cairo_mesh_pattern_begin_patch (pattern);
cairo_mesh_pattern_move_to (pattern, 0, 0);
project (start_angle, radius, &x, &y);
cairo_mesh_pattern_line_to (pattern, x, y);
project (end_angle, radius, &x, &y);
cairo_mesh_pattern_line_to (pattern, x, y);
cairo_mesh_pattern_line_to (pattern, 0, 0);
_cairo_mesh_pattern_set_corner_rgba (pattern, 0, start_color);
_cairo_mesh_pattern_set_corner_rgba (pattern, 1, start_color);
_cairo_mesh_pattern_set_corner_rgba (pattern, 2, end_color);
_cairo_mesh_pattern_set_corner_rgba (pattern, 3, end_color);
cairo_mesh_pattern_end_patch (pattern);
}
static void
gdk_rgba_color_interpolate (GdkRGBA *dest,
const GdkRGBA *src1,
const GdkRGBA *src2,
double progress)
{
double alpha = src1->alpha * (1.0 - progress) + src2->alpha * progress;
dest->alpha = alpha;
if (alpha == 0)
{
dest->red = src1->red * (1.0 - progress) + src2->red * progress;
dest->green = src1->green * (1.0 - progress) + src2->green * progress;
dest->blue = src1->blue * (1.0 - progress) + src2->blue * progress;
}
else
{
dest->red = (src1->red * src1->alpha * (1.0 - progress) + src2->red * src2->alpha * progress) / alpha;
dest->green = (src1->green * src1->alpha * (1.0 - progress) + src2->green * src2->alpha * progress) / alpha;
dest->blue = (src1->blue * src1->alpha * (1.0 - progress) + src2->blue * src2->alpha * progress) / alpha;
}
}
static void
gsk_conic_gradient_node_draw (GskRenderNode *node,
cairo_t *cr)
{
GskConicGradientNode *self = (GskConicGradientNode *) node;
cairo_pattern_t *pattern;
graphene_point_t corner;
float radius;
gsize i;
pattern = cairo_pattern_create_mesh ();
graphene_rect_get_top_right (&node->bounds, &corner);
radius = graphene_point_distance (&self->center, &corner, NULL, NULL);
graphene_rect_get_bottom_right (&node->bounds, &corner);
radius = MAX (radius, graphene_point_distance (&self->center, &corner, NULL, NULL));
graphene_rect_get_bottom_left (&node->bounds, &corner);
radius = MAX (radius, graphene_point_distance (&self->center, &corner, NULL, NULL));
graphene_rect_get_top_left (&node->bounds, &corner);
radius = MAX (radius, graphene_point_distance (&self->center, &corner, NULL, NULL));
for (i = 0; i <= self->n_stops; i++)
{
GskColorStop *stop1 = &self->stops[MAX (i, 1) - 1];
GskColorStop *stop2 = &self->stops[MIN (i, self->n_stops - 1)];
double offset1 = i > 0 ? stop1->offset : 0;
double offset2 = i < self->n_stops ? stop2->offset : 1;
double start_angle, end_angle;
offset1 = offset1 * 360 + self->rotation - 90;
offset2 = offset2 * 360 + self->rotation - 90;
for (start_angle = offset1; start_angle < offset2; start_angle = end_angle)
{
GdkRGBA start_color, end_color;
end_angle = (floor (start_angle / 45) + 1) * 45;
end_angle = MIN (end_angle, offset2);
gdk_rgba_color_interpolate (&start_color,
&stop1->color,
&stop2->color,
(start_angle - offset1) / (offset2 - offset1));
gdk_rgba_color_interpolate (&end_color,
&stop1->color,
&stop2->color,
(end_angle - offset1) / (offset2 - offset1));
gsk_conic_gradient_node_add_patch (pattern,
radius,
DEG_TO_RAD (start_angle),
&start_color,
DEG_TO_RAD (end_angle),
&end_color);
}
}
cairo_pattern_set_extend (pattern, CAIRO_EXTEND_PAD);
gsk_cairo_rectangle (cr, &node->bounds);
cairo_translate (cr, self->center.x, self->center.y);
cairo_set_source (cr, pattern);
cairo_fill (cr);
cairo_pattern_destroy (pattern);
}
static void
gsk_conic_gradient_node_diff (GskRenderNode *node1,
GskRenderNode *node2,
cairo_region_t *region)
{
GskConicGradientNode *self1 = (GskConicGradientNode *) node1;
GskConicGradientNode *self2 = (GskConicGradientNode *) node2;
gsize i;
if (!graphene_point_equal (&self1->center, &self2->center) ||
self1->rotation != self2->rotation ||
self1->n_stops != self2->n_stops)
{
gsk_render_node_diff_impossible (node1, node2, region);
return;
}
for (i = 0; i < self1->n_stops; i++)
{
GskColorStop *stop1 = &self1->stops[i];
GskColorStop *stop2 = &self2->stops[i];
if (stop1->offset != stop2->offset ||
!gdk_rgba_equal (&stop1->color, &stop2->color))
{
gsk_render_node_diff_impossible (node1, node2, region);
return;
}
}
}
static void
gsk_conic_gradient_node_class_init (gpointer g_class,
gpointer class_data)
{
GskRenderNodeClass *node_class = g_class;
node_class->node_type = GSK_CONIC_GRADIENT_NODE;
node_class->finalize = gsk_conic_gradient_node_finalize;
node_class->draw = gsk_conic_gradient_node_draw;
node_class->diff = gsk_conic_gradient_node_diff;
}
/**
* gsk_conic_gradient_node_new:
* @bounds: the bounds of the node
* @center: the center of the gradient
* @rotation: the rotation of the gradient in degrees
* @color_stops: (array length=n_color_stops): a pointer to an array of
* `GskColorStop` defining the gradient. The offsets of all color stops
* must be increasing. The first stop's offset must be >= 0 and the last
* stop's offset must be <= 1.
* @n_color_stops: the number of elements in @color_stops
*
* Creates a `GskRenderNode` that draws a conic gradient.
*
* The conic gradient
* starts around @center in the direction of @rotation. A rotation of 0 means
* that the gradient points up. Color stops are then added clockwise.
*
* Returns: (transfer full) (type GskConicGradientNode): A new `GskRenderNode`
*/
GskRenderNode *
gsk_conic_gradient_node_new (const graphene_rect_t *bounds,
const graphene_point_t *center,
float rotation,
const GskColorStop *color_stops,
gsize n_color_stops)
{
GskConicGradientNode *self;
GskRenderNode *node;
gsize i;
g_return_val_if_fail (bounds != NULL, NULL);
g_return_val_if_fail (center != NULL, NULL);
g_return_val_if_fail (color_stops != NULL, NULL);
g_return_val_if_fail (n_color_stops >= 2, NULL);
g_return_val_if_fail (color_stops[0].offset >= 0, NULL);
for (i = 1; i < n_color_stops; i++)
g_return_val_if_fail (color_stops[i].offset >= color_stops[i - 1].offset, NULL);
g_return_val_if_fail (color_stops[n_color_stops - 1].offset <= 1, NULL);
self = gsk_render_node_alloc (GSK_CONIC_GRADIENT_NODE);
node = (GskRenderNode *) self;
node->offscreen_for_opacity = FALSE;
graphene_rect_init_from_rect (&node->bounds, bounds);
graphene_point_init_from_point (&self->center, center);
self->rotation = rotation;
self->n_stops = n_color_stops;
self->stops = g_malloc_n (n_color_stops, sizeof (GskColorStop));
memcpy (self->stops, color_stops, n_color_stops * sizeof (GskColorStop));
self->angle = 90.f - self->rotation;
self->angle = G_PI * self->angle / 180.f;
self->angle = fmodf (self->angle, 2.f * G_PI);
if (self->angle < 0.f)
self->angle += 2.f * G_PI;
return node;
}
/**
* gsk_conic_gradient_node_get_n_color_stops:
* @node: (type GskConicGradientNode): a `GskRenderNode` for a conic gradient
*
* Retrieves the number of color stops in the gradient.
*
* Returns: the number of color stops
*/
gsize
gsk_conic_gradient_node_get_n_color_stops (const GskRenderNode *node)
{
const GskConicGradientNode *self = (const GskConicGradientNode *) node;
return self->n_stops;
}
/**
* gsk_conic_gradient_node_get_color_stops:
* @node: (type GskConicGradientNode): a `GskRenderNode` for a conic gradient
* @n_stops: (out) (optional): the number of color stops in the returned array
*
* Retrieves the color stops in the gradient.
*
* Returns: (array length=n_stops): the color stops in the gradient
*/
const GskColorStop *
gsk_conic_gradient_node_get_color_stops (const GskRenderNode *node,
gsize *n_stops)
{
const GskConicGradientNode *self = (const GskConicGradientNode *) node;
if (n_stops != NULL)
*n_stops = self->n_stops;
return self->stops;
}
/**
* gsk_conic_gradient_node_get_center:
* @node: (type GskConicGradientNode): a `GskRenderNode` for a conic gradient
*
* Retrieves the center pointer for the gradient.
*
* Returns: the center point for the gradient
*/
const graphene_point_t *
gsk_conic_gradient_node_get_center (const GskRenderNode *node)
{
const GskConicGradientNode *self = (const GskConicGradientNode *) node;
return &self->center;
}
/**
* gsk_conic_gradient_node_get_rotation:
* @node: (type GskConicGradientNode): a `GskRenderNode` for a conic gradient
*
* Retrieves the rotation for the gradient in degrees.
*
* Returns: the rotation for the gradient
*/
float
gsk_conic_gradient_node_get_rotation (const GskRenderNode *node)
{
const GskConicGradientNode *self = (const GskConicGradientNode *) node;
return self->rotation;
}
/**
* gsk_conic_gradient_node_get_angle:
* @node: (type GskConicGradientNode): a `GskRenderNode` for a conic gradient
*
* Retrieves the angle for the gradient in radians, normalized in [0, 2 * PI].
*
* The angle is starting at the top and going clockwise, as expressed
* in the css specification:
*
* angle = 90 - gsk_conic_gradient_node_get_rotation()
*
* Returns: the angle for the gradient
*
* Since: 4.2
*/
float
gsk_conic_gradient_node_get_angle (const GskRenderNode *node)
{
const GskConicGradientNode *self = (const GskConicGradientNode *) node;
return self->angle;
}
/* }}} */
/* {{{ GSK_BORDER_NODE */
/**
* GskBorderNode:
*
* A render node for a border.
*/
struct _GskBorderNode
{
GskRenderNode render_node;
bool uniform_width: 1;
bool uniform_color: 1;
GskRoundedRect outline;
float border_width[4];
GdkRGBA border_color[4];
};
static void
gsk_border_node_mesh_add_patch (cairo_pattern_t *pattern,
const GdkRGBA *color,
double x0,
double y0,
double x1,
double y1,
double x2,
double y2,
double x3,
double y3)
{
cairo_mesh_pattern_begin_patch (pattern);
cairo_mesh_pattern_move_to (pattern, x0, y0);
cairo_mesh_pattern_line_to (pattern, x1, y1);
cairo_mesh_pattern_line_to (pattern, x2, y2);
cairo_mesh_pattern_line_to (pattern, x3, y3);
cairo_mesh_pattern_set_corner_color_rgba (pattern, 0, color->red, color->green, color->blue, color->alpha);
cairo_mesh_pattern_set_corner_color_rgba (pattern, 1, color->red, color->green, color->blue, color->alpha);
cairo_mesh_pattern_set_corner_color_rgba (pattern, 2, color->red, color->green, color->blue, color->alpha);
cairo_mesh_pattern_set_corner_color_rgba (pattern, 3, color->red, color->green, color->blue, color->alpha);
cairo_mesh_pattern_end_patch (pattern);
}
static void
gsk_border_node_draw (GskRenderNode *node,
cairo_t *cr)
{
GskBorderNode *self = (GskBorderNode *) node;
GskRoundedRect inside;
cairo_save (cr);
gsk_rounded_rect_init_copy (&inside, &self->outline);
gsk_rounded_rect_shrink (&inside,
self->border_width[0], self->border_width[1],
self->border_width[2], self->border_width[3]);
cairo_set_fill_rule (cr, CAIRO_FILL_RULE_EVEN_ODD);
gsk_rounded_rect_path (&self->outline, cr);
gsk_rounded_rect_path (&inside, cr);
if (gdk_rgba_equal (&self->border_color[0], &self->border_color[1]) &&
gdk_rgba_equal (&self->border_color[0], &self->border_color[2]) &&
gdk_rgba_equal (&self->border_color[0], &self->border_color[3]))
{
gdk_cairo_set_source_rgba (cr, &self->border_color[0]);
}
else
{
const graphene_rect_t *bounds = &self->outline.bounds;
/* distance to center "line":
* +-------------------------+
* | |
* | |
* | ---this-line--- |
* | |
* | |
* +-------------------------+
* That line is equidistant from all sides. It's either horizontal
* or vertical, depending on if the rect is wider or taller.
* We use the 4 sides spanned up by connecting the line to the corner
* points to color the regions of the rectangle differently.
* Note that the call to cairo_fill() will add the potential final
* segment by closing the path, so we don't have to care.
*/
cairo_pattern_t *mesh;
cairo_matrix_t mat;
graphene_point_t tl, br;
float scale;
mesh = cairo_pattern_create_mesh ();
cairo_matrix_init_translate (&mat, -bounds->origin.x, -bounds->origin.y);
cairo_pattern_set_matrix (mesh, &mat);
scale = MIN (bounds->size.width / (self->border_width[1] + self->border_width[3]),
bounds->size.height / (self->border_width[0] + self->border_width[2]));
graphene_point_init (&tl,
self->border_width[3] * scale,
self->border_width[0] * scale);
graphene_point_init (&br,
bounds->size.width - self->border_width[1] * scale,
bounds->size.height - self->border_width[2] * scale);
/* Top */
if (self->border_width[0] > 0)
{
gsk_border_node_mesh_add_patch (mesh,
&self->border_color[0],
0, 0,
tl.x, tl.y,
br.x, tl.y,
bounds->size.width, 0);
}
/* Right */
if (self->border_width[1] > 0)
{
gsk_border_node_mesh_add_patch (mesh,
&self->border_color[1],
bounds->size.width, 0,
br.x, tl.y,
br.x, br.y,
bounds->size.width, bounds->size.height);
}
/* Bottom */
if (self->border_width[2] > 0)
{
gsk_border_node_mesh_add_patch (mesh,
&self->border_color[2],
0, bounds->size.height,
tl.x, br.y,
br.x, br.y,
bounds->size.width, bounds->size.height);
}
/* Left */
if (self->border_width[3] > 0)
{
gsk_border_node_mesh_add_patch (mesh,
&self->border_color[3],
0, 0,
tl.x, tl.y,
tl.x, br.y,
0, bounds->size.height);
}
cairo_set_source (cr, mesh);
cairo_pattern_destroy (mesh);
}
cairo_fill (cr);
cairo_restore (cr);
}
static void
gsk_border_node_diff (GskRenderNode *node1,
GskRenderNode *node2,
cairo_region_t *region)
{
GskBorderNode *self1 = (GskBorderNode *) node1;
GskBorderNode *self2 = (GskBorderNode *) node2;
gboolean uniform1 = self1->uniform_width && self1->uniform_color;
gboolean uniform2 = self2->uniform_width && self2->uniform_color;
if (uniform1 &&
uniform2 &&
self1->border_width[0] == self2->border_width[0] &&
gsk_rounded_rect_equal (&self1->outline, &self2->outline) &&
gdk_rgba_equal (&self1->border_color[0], &self2->border_color[0]))
return;
/* Different uniformity -> diff impossible */
if (uniform1 ^ uniform2)
{
gsk_render_node_diff_impossible (node1, node2, region);
return;
}
if (self1->border_width[0] == self2->border_width[0] &&
self1->border_width[1] == self2->border_width[1] &&
self1->border_width[2] == self2->border_width[2] &&
self1->border_width[3] == self2->border_width[3] &&
gdk_rgba_equal (&self1->border_color[0], &self2->border_color[0]) &&
gdk_rgba_equal (&self1->border_color[1], &self2->border_color[1]) &&
gdk_rgba_equal (&self1->border_color[2], &self2->border_color[2]) &&
gdk_rgba_equal (&self1->border_color[3], &self2->border_color[3]) &&
gsk_rounded_rect_equal (&self1->outline, &self2->outline))
return;
gsk_render_node_diff_impossible (node1, node2, region);
}
static void
gsk_border_node_class_init (gpointer g_class,
gpointer class_data)
{
GskRenderNodeClass *node_class = g_class;
node_class->node_type = GSK_BORDER_NODE;
node_class->draw = gsk_border_node_draw;
node_class->diff = gsk_border_node_diff;
}
/**
* gsk_border_node_get_outline:
* @node: (type GskBorderNode): a `GskRenderNode` for a border
*
* Retrieves the outline of the border.
*
* Returns: the outline of the border
*/
const GskRoundedRect *
gsk_border_node_get_outline (const GskRenderNode *node)
{
const GskBorderNode *self = (const GskBorderNode *) node;
return &self->outline;
}
/**
* gsk_border_node_get_widths:
* @node: (type GskBorderNode): a `GskRenderNode` for a border
*
* Retrieves the stroke widths of the border.
*
* Returns: (transfer none) (array fixed-size=4): an array of 4 floats
* for the top, right, bottom and left stroke width of the border,
* respectively
*/
const float *
gsk_border_node_get_widths (const GskRenderNode *node)
{
const GskBorderNode *self = (const GskBorderNode *) node;
return self->border_width;
}
/**
* gsk_border_node_get_colors:
* @node: (type GskBorderNode): a `GskRenderNode` for a border
*
* Retrieves the colors of the border.
*
* Returns: (transfer none): an array of 4 `GdkRGBA` structs
* for the top, right, bottom and left color of the border
*/
const GdkRGBA *
gsk_border_node_get_colors (const GskRenderNode *node)
{
const GskBorderNode *self = (const GskBorderNode *) node;
return self->border_color;
}
/**
* gsk_border_node_new:
* @outline: a `GskRoundedRect` describing the outline of the border
* @border_width: (array fixed-size=4): the stroke width of the border on
* the top, right, bottom and left side respectively.
* @border_color: (array fixed-size=4): the color used on the top, right,
* bottom and left side.
*
* Creates a `GskRenderNode` that will stroke a border rectangle inside the
* given @outline.
*
* The 4 sides of the border can have different widths and colors.
*
* Returns: (transfer full) (type GskBorderNode): A new `GskRenderNode`
*/
GskRenderNode *
gsk_border_node_new (const GskRoundedRect *outline,
const float border_width[4],
const GdkRGBA border_color[4])
{
GskBorderNode *self;
GskRenderNode *node;
g_return_val_if_fail (outline != NULL, NULL);
g_return_val_if_fail (border_width != NULL, NULL);
g_return_val_if_fail (border_color != NULL, NULL);
self = gsk_render_node_alloc (GSK_BORDER_NODE);
node = (GskRenderNode *) self;
node->offscreen_for_opacity = FALSE;
gsk_rounded_rect_init_copy (&self->outline, outline);
memcpy (self->border_width, border_width, sizeof (self->border_width));
memcpy (self->border_color, border_color, sizeof (self->border_color));
if (border_width[0] == border_width[1] &&
border_width[0] == border_width[2] &&
border_width[0] == border_width[3])
self->uniform_width = TRUE;
else
self->uniform_width = FALSE;
if (gdk_rgba_equal (&border_color[0], &border_color[1]) &&
gdk_rgba_equal (&border_color[0], &border_color[2]) &&
gdk_rgba_equal (&border_color[0], &border_color[3]))
self->uniform_color = TRUE;
else
self->uniform_color = FALSE;
graphene_rect_init_from_rect (&node->bounds, &self->outline.bounds);
return node;
}
/* Private */
bool
gsk_border_node_get_uniform (const GskRenderNode *self)
{
const GskBorderNode *node = (const GskBorderNode *)self;
return node->uniform_width && node->uniform_color;
}
bool
gsk_border_node_get_uniform_color (const GskRenderNode *self)
{
const GskBorderNode *node = (const GskBorderNode *)self;
return node->uniform_color;
}
/* }}} */
/* {{{ GSK_TEXTURE_NODE */
/**
* GskTextureNode:
*
* A render node for a `GdkTexture`.
*/
struct _GskTextureNode
{
GskRenderNode render_node;
GdkTexture *texture;
};
static void
gsk_texture_node_finalize (GskRenderNode *node)
{
GskTextureNode *self = (GskTextureNode *) node;
GskRenderNodeClass *parent_class = g_type_class_peek (g_type_parent (GSK_TYPE_TEXTURE_NODE));
g_clear_object (&self->texture);
parent_class->finalize (node);
}
static void
gsk_texture_node_draw (GskRenderNode *node,
cairo_t *cr)
{
GskTextureNode *self = (GskTextureNode *) node;
cairo_surface_t *surface;
cairo_pattern_t *pattern;
cairo_matrix_t matrix;
surface = gdk_texture_download_surface (self->texture);
pattern = cairo_pattern_create_for_surface (surface);
cairo_pattern_set_extend (pattern, CAIRO_EXTEND_PAD);
cairo_matrix_init_scale (&matrix,
gdk_texture_get_width (self->texture) / node->bounds.size.width,
gdk_texture_get_height (self->texture) / node->bounds.size.height);
cairo_matrix_translate (&matrix,
-node->bounds.origin.x,
-node->bounds.origin.y);
cairo_pattern_set_matrix (pattern, &matrix);
cairo_set_source (cr, pattern);
cairo_pattern_destroy (pattern);
cairo_surface_destroy (surface);
gsk_cairo_rectangle (cr, &node->bounds);
cairo_fill (cr);
}
static void
gsk_texture_node_diff (GskRenderNode *node1,
GskRenderNode *node2,
cairo_region_t *region)
{
GskTextureNode *self1 = (GskTextureNode *) node1;
GskTextureNode *self2 = (GskTextureNode *) node2;
cairo_region_t *sub;
if (!graphene_rect_equal (&node1->bounds, &node2->bounds) ||
gdk_texture_get_width (self1->texture) != gdk_texture_get_width (self2->texture) ||
gdk_texture_get_height (self1->texture) != gdk_texture_get_height (self2->texture))
{
gsk_render_node_diff_impossible (node1, node2, region);
return;
}
if (self1->texture == self2->texture)
return;
sub = cairo_region_create ();
gdk_texture_diff (self1->texture, self2->texture, sub);
region_union_region_affine (region,
sub,
node1->bounds.size.width / gdk_texture_get_width (self1->texture),
node1->bounds.size.height / gdk_texture_get_height (self1->texture),
node1->bounds.origin.x,
node1->bounds.origin.y);
cairo_region_destroy (sub);
}
static void
gsk_texture_node_class_init (gpointer g_class,
gpointer class_data)
{
GskRenderNodeClass *node_class = g_class;
node_class->node_type = GSK_TEXTURE_NODE;
node_class->finalize = gsk_texture_node_finalize;
node_class->draw = gsk_texture_node_draw;
node_class->diff = gsk_texture_node_diff;
}
/**
* gsk_texture_node_get_texture:
* @node: (type GskTextureNode): a `GskRenderNode` of type %GSK_TEXTURE_NODE
*
* Retrieves the `GdkTexture` used when creating this `GskRenderNode`.
*
* Returns: (transfer none): the `GdkTexture`
*/
GdkTexture *
gsk_texture_node_get_texture (const GskRenderNode *node)
{
const GskTextureNode *self = (const GskTextureNode *) node;
return self->texture;
}
/**
* gsk_texture_node_new:
* @texture: the `GdkTexture`
* @bounds: the rectangle to render the texture into
*
* Creates a `GskRenderNode` that will render the given
* @texture into the area given by @bounds.
*
* Note that GSK applies linear filtering when textures are
* scaled and transformed. See [class@Gsk.TextureScaleNode]
* for a way to influence filtering.
*
* Returns: (transfer full) (type GskTextureNode): A new `GskRenderNode`
*/
GskRenderNode *
gsk_texture_node_new (GdkTexture *texture,
const graphene_rect_t *bounds)
{
GskTextureNode *self;
GskRenderNode *node;
g_return_val_if_fail (GDK_IS_TEXTURE (texture), NULL);
g_return_val_if_fail (bounds != NULL, NULL);
self = gsk_render_node_alloc (GSK_TEXTURE_NODE);
node = (GskRenderNode *) self;
node->offscreen_for_opacity = FALSE;
self->texture = g_object_ref (texture);
graphene_rect_init_from_rect (&node->bounds, bounds);
node->preferred_depth = gdk_memory_format_get_depth (gdk_texture_get_format (texture));
return node;
}
/* }}} */
/* {{{ GSK_TEXTURE_SCALE_NODE */
/**
* GskTextureScaleNode:
*
* A render node for a `GdkTexture`.
*
* Since: 4.10
*/
struct _GskTextureScaleNode
{
GskRenderNode render_node;
GdkTexture *texture;
GskScalingFilter filter;
};
static void
gsk_texture_scale_node_finalize (GskRenderNode *node)
{
GskTextureScaleNode *self = (GskTextureScaleNode *) node;
GskRenderNodeClass *parent_class = g_type_class_peek (g_type_parent (GSK_TYPE_TEXTURE_SCALE_NODE));
g_clear_object (&self->texture);
parent_class->finalize (node);
}
static void
gsk_texture_scale_node_draw (GskRenderNode *node,
cairo_t *cr)
{
GskTextureScaleNode *self = (GskTextureScaleNode *) node;
cairo_surface_t *surface;
cairo_pattern_t *pattern;
cairo_matrix_t matrix;
cairo_filter_t filters[] = {
CAIRO_FILTER_BILINEAR,
CAIRO_FILTER_NEAREST,
CAIRO_FILTER_GOOD,
};
cairo_t *cr2;
cairo_surface_t *surface2;
graphene_rect_t clip_rect;
/* Make sure we draw the minimum region by using the clip */
gsk_cairo_rectangle (cr, &node->bounds);
cairo_clip (cr);
_graphene_rect_init_from_clip_extents (&clip_rect, cr);
if (clip_rect.size.width <= 0 || clip_rect.size.height <= 0)
return;
surface2 = cairo_image_surface_create (CAIRO_FORMAT_ARGB32,
(int) ceilf (clip_rect.size.width),
(int) ceilf (clip_rect.size.height));
cairo_surface_set_device_offset (surface2, -clip_rect.origin.x, -clip_rect.origin.y);
cr2 = cairo_create (surface2);
surface = gdk_texture_download_surface (self->texture);
pattern = cairo_pattern_create_for_surface (surface);
cairo_pattern_set_extend (pattern, CAIRO_EXTEND_PAD);
cairo_matrix_init_scale (&matrix,
gdk_texture_get_width (self->texture) / node->bounds.size.width,
gdk_texture_get_height (self->texture) / node->bounds.size.height);
cairo_pattern_set_matrix (pattern, &matrix);
cairo_pattern_set_filter (pattern, filters[self->filter]);
cairo_set_source (cr2, pattern);
cairo_pattern_destroy (pattern);
cairo_surface_destroy (surface);
cairo_rectangle (cr2, 0, 0, node->bounds.size.width, node->bounds.size.height);
cairo_fill (cr2);
cairo_destroy (cr2);
cairo_save (cr);
pattern = cairo_pattern_create_for_surface (surface2);
cairo_pattern_set_extend (pattern, CAIRO_EXTEND_PAD);
cairo_matrix_init_identity (&matrix);
cairo_matrix_translate (&matrix,
-node->bounds.origin.x,
-node->bounds.origin.y);
cairo_pattern_set_matrix (pattern, &matrix);
cairo_set_source (cr, pattern);
cairo_pattern_destroy (pattern);
cairo_surface_destroy (surface2);
gsk_cairo_rectangle (cr, &node->bounds);
cairo_fill (cr);
cairo_restore (cr);
}
static void
gsk_texture_scale_node_diff (GskRenderNode *node1,
GskRenderNode *node2,
cairo_region_t *region)
{
GskTextureScaleNode *self1 = (GskTextureScaleNode *) node1;
GskTextureScaleNode *self2 = (GskTextureScaleNode *) node2;
cairo_region_t *sub;
if (!graphene_rect_equal (&node1->bounds, &node2->bounds) ||
self1->filter != self2->filter ||
gdk_texture_get_width (self1->texture) != gdk_texture_get_width (self2->texture) ||
gdk_texture_get_height (self1->texture) != gdk_texture_get_height (self2->texture))
{
gsk_render_node_diff_impossible (node1, node2, region);
return;
}
if (self1->texture == self2->texture)
return;
sub = cairo_region_create ();
gdk_texture_diff (self1->texture, self2->texture, sub);
region_union_region_affine (region,
sub,
node1->bounds.size.width / gdk_texture_get_width (self1->texture),
node1->bounds.size.height / gdk_texture_get_height (self1->texture),
node1->bounds.origin.x,
node1->bounds.origin.y);
cairo_region_destroy (sub);
}
static void
gsk_texture_scale_node_class_init (gpointer g_class,
gpointer class_data)
{
GskRenderNodeClass *node_class = g_class;
node_class->node_type = GSK_TEXTURE_SCALE_NODE;
node_class->finalize = gsk_texture_scale_node_finalize;
node_class->draw = gsk_texture_scale_node_draw;
node_class->diff = gsk_texture_scale_node_diff;
}
/**
* gsk_texture_scale_node_get_texture:
* @node: (type GskTextureScaleNode): a `GskRenderNode` of type %GSK_TEXTURE_SCALE_NODE
*
* Retrieves the `GdkTexture` used when creating this `GskRenderNode`.
*
* Returns: (transfer none): the `GdkTexture`
*
* Since: 4.10
*/
GdkTexture *
gsk_texture_scale_node_get_texture (const GskRenderNode *node)
{
const GskTextureScaleNode *self = (const GskTextureScaleNode *) node;
return self->texture;
}
/**
* gsk_texture_scale_node_get_filter:
* @node: (type GskTextureScaleNode): a `GskRenderNode` of type %GSK_TEXTURE_SCALE_NODE
*
* Retrieves the `GskScalingFilter` used when creating this `GskRenderNode`.
*
* Returns: (transfer none): the `GskScalingFilter`
*
* Since: 4.10
*/
GskScalingFilter
gsk_texture_scale_node_get_filter (const GskRenderNode *node)
{
const GskTextureScaleNode *self = (const GskTextureScaleNode *) node;
return self->filter;
}
/**
* gsk_texture_scale_node_new:
* @texture: the texture to scale
* @bounds: the size of the texture to scale to
* @filter: how to scale the texture
*
* Creates a node that scales the texture to the size given by the
* bounds using the filter and then places it at the bounds' position.
*
* Note that further scaling and other transformations which are
* applied to the node will apply linear filtering to the resulting
* texture, as usual.
*
* This node is intended for tight control over scaling applied
* to a texture, such as in image editors and requires the
* application to be aware of the whole render tree as further
* transforms may be applied that conflict with the desired effect
* of this node.
*
* Returns: (transfer full) (type GskTextureScaleNode): A new `GskRenderNode`
*
* Since: 4.10
*/
GskRenderNode *
gsk_texture_scale_node_new (GdkTexture *texture,
const graphene_rect_t *bounds,
GskScalingFilter filter)
{
GskTextureScaleNode *self;
GskRenderNode *node;
g_return_val_if_fail (GDK_IS_TEXTURE (texture), NULL);
g_return_val_if_fail (bounds != NULL, NULL);
self = gsk_render_node_alloc (GSK_TEXTURE_SCALE_NODE);
node = (GskRenderNode *) self;
node->offscreen_for_opacity = FALSE;
self->texture = g_object_ref (texture);
graphene_rect_init_from_rect (&node->bounds, bounds);
self->filter = filter;
node->preferred_depth = gdk_memory_format_get_depth (gdk_texture_get_format (texture));
return node;
}
/* }}} */
/* {{{ GSK_INSET_SHADOW_NODE */
/**
* GskInsetShadowNode:
*
* A render node for an inset shadow.
*/
struct _GskInsetShadowNode
{
GskRenderNode render_node;
GskRoundedRect outline;
GdkRGBA color;
float dx;
float dy;
float spread;
float blur_radius;
};
static gboolean
has_empty_clip (cairo_t *cr)
{
double x1, y1, x2, y2;
cairo_clip_extents (cr, &x1, &y1, &x2, &y2);
return x1 == x2 && y1 == y2;
}
static void
draw_shadow (cairo_t *cr,
gboolean inset,
const GskRoundedRect *box,
const GskRoundedRect *clip_box,
float radius,
const GdkRGBA *color,
GskBlurFlags blur_flags)
{
cairo_t *shadow_cr;
if (has_empty_clip (cr))
return;
gdk_cairo_set_source_rgba (cr, color);
shadow_cr = gsk_cairo_blur_start_drawing (cr, radius, blur_flags);
cairo_set_fill_rule (shadow_cr, CAIRO_FILL_RULE_EVEN_ODD);
gsk_rounded_rect_path (box, shadow_cr);
if (inset)
gsk_cairo_rectangle (shadow_cr, &clip_box->bounds);
cairo_fill (shadow_cr);
gsk_cairo_blur_finish_drawing (shadow_cr, radius, color, blur_flags);
}
typedef struct {
float radius;
graphene_size_t corner;
} CornerMask;
typedef enum {
TOP,
RIGHT,
BOTTOM,
LEFT
} Side;
static guint
corner_mask_hash (CornerMask *mask)
{
return ((guint)mask->radius << 24) ^
((guint)(mask->corner.width*4)) << 12 ^
((guint)(mask->corner.height*4)) << 0;
}
static gboolean
corner_mask_equal (CornerMask *mask1,
CornerMask *mask2)
{
return
mask1->radius == mask2->radius &&
mask1->corner.width == mask2->corner.width &&
mask1->corner.height == mask2->corner.height;
}
static void
draw_shadow_corner (cairo_t *cr,
gboolean inset,
const GskRoundedRect *box,
const GskRoundedRect *clip_box,
float radius,
const GdkRGBA *color,
GskCorner corner,
cairo_rectangle_int_t *drawn_rect)
{
float clip_radius;
int x1, x2, x3, y1, y2, y3, x, y;
GskRoundedRect corner_box;
cairo_t *mask_cr;
cairo_surface_t *mask;
cairo_pattern_t *pattern;
cairo_matrix_t matrix;
float sx, sy;
static GHashTable *corner_mask_cache = NULL;
float max_other;
CornerMask key;
gboolean overlapped;
clip_radius = gsk_cairo_blur_compute_pixels (radius);
overlapped = FALSE;
if (corner == GSK_CORNER_TOP_LEFT || corner == GSK_CORNER_BOTTOM_LEFT)
{
x1 = floor (box->bounds.origin.x - clip_radius);
x2 = ceil (box->bounds.origin.x + box->corner[corner].width + clip_radius);
x = x1;
sx = 1;
max_other = MAX(box->corner[GSK_CORNER_TOP_RIGHT].width, box->corner[GSK_CORNER_BOTTOM_RIGHT].width);
x3 = floor (box->bounds.origin.x + box->bounds.size.width - max_other - clip_radius);
if (x2 > x3)
overlapped = TRUE;
}
else
{
x1 = floor (box->bounds.origin.x + box->bounds.size.width - box->corner[corner].width - clip_radius);
x2 = ceil (box->bounds.origin.x + box->bounds.size.width + clip_radius);
x = x2;
sx = -1;
max_other = MAX(box->corner[GSK_CORNER_TOP_LEFT].width, box->corner[GSK_CORNER_BOTTOM_LEFT].width);
x3 = ceil (box->bounds.origin.x + max_other + clip_radius);
if (x3 > x1)
overlapped = TRUE;
}
if (corner == GSK_CORNER_TOP_LEFT || corner == GSK_CORNER_TOP_RIGHT)
{
y1 = floor (box->bounds.origin.y - clip_radius);
y2 = ceil (box->bounds.origin.y + box->corner[corner].height + clip_radius);
y = y1;
sy = 1;
max_other = MAX(box->corner[GSK_CORNER_BOTTOM_LEFT].height, box->corner[GSK_CORNER_BOTTOM_RIGHT].height);
y3 = floor (box->bounds.origin.y + box->bounds.size.height - max_other - clip_radius);
if (y2 > y3)
overlapped = TRUE;
}
else
{
y1 = floor (box->bounds.origin.y + box->bounds.size.height - box->corner[corner].height - clip_radius);
y2 = ceil (box->bounds.origin.y + box->bounds.size.height + clip_radius);
y = y2;
sy = -1;
max_other = MAX(box->corner[GSK_CORNER_TOP_LEFT].height, box->corner[GSK_CORNER_TOP_RIGHT].height);
y3 = ceil (box->bounds.origin.y + max_other + clip_radius);
if (y3 > y1)
overlapped = TRUE;
}
drawn_rect->x = x1;
drawn_rect->y = y1;
drawn_rect->width = x2 - x1;
drawn_rect->height = y2 - y1;
cairo_rectangle (cr, x1, y1, x2 - x1, y2 - y1);
cairo_clip (cr);
if (inset || overlapped)
{
/* Fall back to generic path if inset or if the corner radius
runs into each other */
draw_shadow (cr, inset, box, clip_box, radius, color, GSK_BLUR_X | GSK_BLUR_Y);
return;
}
if (has_empty_clip (cr))
return;
/* At this point we're drawing a blurred outset corner. The only
* things that affect the output of the blurred mask in this case
* is:
*
* What corner this is, which defines the orientation (sx,sy)
* and position (x,y)
*
* The blur radius (which also defines the clip_radius)
*
* The horizontal and vertical corner radius
*
* We apply the first position and orientation when drawing the
* mask, so we cache rendered masks based on the blur radius and the
* corner radius.
*/
if (corner_mask_cache == NULL)
corner_mask_cache = g_hash_table_new_full ((GHashFunc)corner_mask_hash,
(GEqualFunc)corner_mask_equal,
g_free, (GDestroyNotify)cairo_surface_destroy);
key.radius = radius;
key.corner = box->corner[corner];
mask = g_hash_table_lookup (corner_mask_cache, &key);
if (mask == NULL)
{
mask = cairo_surface_create_similar_image (cairo_get_target (cr), CAIRO_FORMAT_A8,
drawn_rect->width + clip_radius,
drawn_rect->height + clip_radius);
mask_cr = cairo_create (mask);
gsk_rounded_rect_init_from_rect (&corner_box, &GRAPHENE_RECT_INIT (clip_radius, clip_radius, 2*drawn_rect->width, 2*drawn_rect->height), 0);
corner_box.corner[0] = box->corner[corner];
gsk_rounded_rect_path (&corner_box, mask_cr);
cairo_fill (mask_cr);
gsk_cairo_blur_surface (mask, radius, GSK_BLUR_X | GSK_BLUR_Y);
cairo_destroy (mask_cr);
g_hash_table_insert (corner_mask_cache, g_memdup2 (&key, sizeof (key)), mask);
}
gdk_cairo_set_source_rgba (cr, color);
pattern = cairo_pattern_create_for_surface (mask);
cairo_matrix_init_identity (&matrix);
cairo_matrix_scale (&matrix, sx, sy);
cairo_matrix_translate (&matrix, -x, -y);
cairo_pattern_set_matrix (pattern, &matrix);
cairo_mask (cr, pattern);
cairo_pattern_destroy (pattern);
}
static void
draw_shadow_side (cairo_t *cr,
gboolean inset,
const GskRoundedRect *box,
const GskRoundedRect *clip_box,
float radius,
const GdkRGBA *color,
Side side,
cairo_rectangle_int_t *drawn_rect)
{
GskBlurFlags blur_flags = GSK_BLUR_REPEAT;
double clip_radius;
int x1, x2, y1, y2;
clip_radius = gsk_cairo_blur_compute_pixels (radius);
if (side == TOP || side == BOTTOM)
{
blur_flags |= GSK_BLUR_Y;
x1 = floor (box->bounds.origin.x - clip_radius);
x2 = ceil (box->bounds.origin.x + box->bounds.size.width + clip_radius);
}
else if (side == LEFT)
{
x1 = floor (box->bounds.origin.x -clip_radius);
x2 = ceil (box->bounds.origin.x + clip_radius);
}
else
{
x1 = floor (box->bounds.origin.x + box->bounds.size.width -clip_radius);
x2 = ceil (box->bounds.origin.x + box->bounds.size.width + clip_radius);
}
if (side == LEFT || side == RIGHT)
{
blur_flags |= GSK_BLUR_X;
y1 = floor (box->bounds.origin.y - clip_radius);
y2 = ceil (box->bounds.origin.y + box->bounds.size.height + clip_radius);
}
else if (side == TOP)
{
y1 = floor (box->bounds.origin.y -clip_radius);
y2 = ceil (box->bounds.origin.y + clip_radius);
}
else
{
y1 = floor (box->bounds.origin.y + box->bounds.size.height -clip_radius);
y2 = ceil (box->bounds.origin.y + box->bounds.size.height + clip_radius);
}
drawn_rect->x = x1;
drawn_rect->y = y1;
drawn_rect->width = x2 - x1;
drawn_rect->height = y2 - y1;
cairo_rectangle (cr, x1, y1, x2 - x1, y2 - y1);
cairo_clip (cr);
draw_shadow (cr, inset, box, clip_box, radius, color, blur_flags);
}
static gboolean
needs_blur (double radius)
{
/* The code doesn't actually do any blurring for radius 1, as it
* ends up with box filter size 1 */
if (radius <= 1.0)
return FALSE;
return TRUE;
}
static void
gsk_inset_shadow_node_draw (GskRenderNode *node,
cairo_t *cr)
{
GskInsetShadowNode *self = (GskInsetShadowNode *) node;
GskRoundedRect box, clip_box;
int clip_radius;
graphene_rect_t clip_rect;
double blur_radius;
/* We don't need to draw invisible shadows */
if (gdk_rgba_is_clear (&self->color))
return;
_graphene_rect_init_from_clip_extents (&clip_rect, cr);
if (!gsk_rounded_rect_intersects_rect (&self->outline, &clip_rect))
return;
blur_radius = self->blur_radius / 2;
clip_radius = gsk_cairo_blur_compute_pixels (blur_radius);
cairo_save (cr);
gsk_rounded_rect_path (&self->outline, cr);
cairo_clip (cr);
gsk_rounded_rect_init_copy (&box, &self->outline);
gsk_rounded_rect_offset (&box, self->dx, self->dy);
gsk_rounded_rect_shrink (&box, self->spread, self->spread, self->spread, self->spread);
gsk_rounded_rect_init_copy (&clip_box, &self->outline);
gsk_rounded_rect_shrink (&clip_box, -clip_radius, -clip_radius, -clip_radius, -clip_radius);
if (!needs_blur (blur_radius))
draw_shadow (cr, TRUE, &box, &clip_box, blur_radius, &self->color, GSK_BLUR_NONE);
else
{
cairo_region_t *remaining;
cairo_rectangle_int_t r;
int i;
/* For the blurred case we divide the rendering into 9 parts,
* 4 of the corners, 4 for the horizonat/vertical lines and
* one for the interior. We make the non-interior parts
* large enough to fit the full radius of the blur, so that
* the interior part can be drawn solidly.
*/
/* In the inset case we want to paint the whole clip-box.
* We could remove the part of "box" where the blur doesn't
* reach, but computing that is a bit tricky since the
* rounded corners are on the "inside" of it. */
r.x = floor (clip_box.bounds.origin.x);
r.y = floor (clip_box.bounds.origin.y);
r.width = ceil (clip_box.bounds.origin.x + clip_box.bounds.size.width) - r.x;
r.height = ceil (clip_box.bounds.origin.y + clip_box.bounds.size.height) - r.y;
remaining = cairo_region_create_rectangle (&r);
/* First do the corners of box */
for (i = 0; i < 4; i++)
{
cairo_save (cr);
/* Always clip with remaining to ensure we never draw any area twice */
gdk_cairo_region (cr, remaining);
cairo_clip (cr);
draw_shadow_corner (cr, TRUE, &box, &clip_box, blur_radius, &self->color, i, &r);
cairo_restore (cr);
/* We drew the region, remove it from remaining */
cairo_region_subtract_rectangle (remaining, &r);
}
/* Then the sides */
for (i = 0; i < 4; i++)
{
cairo_save (cr);
/* Always clip with remaining to ensure we never draw any area twice */
gdk_cairo_region (cr, remaining);
cairo_clip (cr);
draw_shadow_side (cr, TRUE, &box, &clip_box, blur_radius, &self->color, i, &r);
cairo_restore (cr);
/* We drew the region, remove it from remaining */
cairo_region_subtract_rectangle (remaining, &r);
}
/* Then the rest, which needs no blurring */
cairo_save (cr);
gdk_cairo_region (cr, remaining);
cairo_clip (cr);
draw_shadow (cr, TRUE, &box, &clip_box, blur_radius, &self->color, GSK_BLUR_NONE);
cairo_restore (cr);
cairo_region_destroy (remaining);
}
cairo_restore (cr);
}
static void
gsk_inset_shadow_node_diff (GskRenderNode *node1,
GskRenderNode *node2,
cairo_region_t *region)
{
GskInsetShadowNode *self1 = (GskInsetShadowNode *) node1;
GskInsetShadowNode *self2 = (GskInsetShadowNode *) node2;
if (gsk_rounded_rect_equal (&self1->outline, &self2->outline) &&
gdk_rgba_equal (&self1->color, &self2->color) &&
self1->dx == self2->dx &&
self1->dy == self2->dy &&
self1->spread == self2->spread &&
self1->blur_radius == self2->blur_radius)
return;
gsk_render_node_diff_impossible (node1, node2, region);
}
static void
gsk_inset_shadow_node_class_init (gpointer g_class,
gpointer class_data)
{
GskRenderNodeClass *node_class = g_class;
node_class->node_type = GSK_INSET_SHADOW_NODE;
node_class->draw = gsk_inset_shadow_node_draw;
node_class->diff = gsk_inset_shadow_node_diff;
}
/**
* gsk_inset_shadow_node_new:
* @outline: outline of the region containing the shadow
* @color: color of the shadow
* @dx: horizontal offset of shadow
* @dy: vertical offset of shadow
* @spread: how far the shadow spreads towards the inside
* @blur_radius: how much blur to apply to the shadow
*
* Creates a `GskRenderNode` that will render an inset shadow
* into the box given by @outline.
*
* Returns: (transfer full) (type GskInsetShadowNode): A new `GskRenderNode`
*/
GskRenderNode *
gsk_inset_shadow_node_new (const GskRoundedRect *outline,
const GdkRGBA *color,
float dx,
float dy,
float spread,
float blur_radius)
{
GskInsetShadowNode *self;
GskRenderNode *node;
g_return_val_if_fail (outline != NULL, NULL);
g_return_val_if_fail (color != NULL, NULL);
g_return_val_if_fail (blur_radius >= 0, NULL);
self = gsk_render_node_alloc (GSK_INSET_SHADOW_NODE);
node = (GskRenderNode *) self;
node->offscreen_for_opacity = FALSE;
gsk_rounded_rect_init_copy (&self->outline, outline);
self->color = *color;
self->dx = dx;
self->dy = dy;
self->spread = spread;
self->blur_radius = blur_radius;
graphene_rect_init_from_rect (&node->bounds, &self->outline.bounds);
return node;
}
/**
* gsk_inset_shadow_node_get_outline:
* @node: (type GskInsetShadowNode): a `GskRenderNode` for an inset shadow
*
* Retrieves the outline rectangle of the inset shadow.
*
* Returns: (transfer none): a rounded rectangle
*/
const GskRoundedRect *
gsk_inset_shadow_node_get_outline (const GskRenderNode *node)
{
const GskInsetShadowNode *self = (const GskInsetShadowNode *) node;
return &self->outline;
}
/**
* gsk_inset_shadow_node_get_color:
* @node: (type GskInsetShadowNode): a `GskRenderNode` for an inset shadow
*
* Retrieves the color of the inset shadow.
*
* Returns: (transfer none): the color of the shadow
*/
const GdkRGBA *
gsk_inset_shadow_node_get_color (const GskRenderNode *node)
{
const GskInsetShadowNode *self = (const GskInsetShadowNode *) node;
return &self->color;
}
/**
* gsk_inset_shadow_node_get_dx:
* @node: (type GskInsetShadowNode): a `GskRenderNode` for an inset shadow
*
* Retrieves the horizontal offset of the inset shadow.
*
* Returns: an offset, in pixels
*/
float
gsk_inset_shadow_node_get_dx (const GskRenderNode *node)
{
const GskInsetShadowNode *self = (const GskInsetShadowNode *) node;
return self->dx;
}
/**
* gsk_inset_shadow_node_get_dy:
* @node: (type GskInsetShadowNode): a `GskRenderNode` for an inset shadow
*
* Retrieves the vertical offset of the inset shadow.
*
* Returns: an offset, in pixels
*/
float
gsk_inset_shadow_node_get_dy (const GskRenderNode *node)
{
const GskInsetShadowNode *self = (const GskInsetShadowNode *) node;
return self->dy;
}
/**
* gsk_inset_shadow_node_get_spread:
* @node: (type GskInsetShadowNode): a `GskRenderNode` for an inset shadow
*
* Retrieves how much the shadow spreads inwards.
*
* Returns: the size of the shadow, in pixels
*/
float
gsk_inset_shadow_node_get_spread (const GskRenderNode *node)
{
const GskInsetShadowNode *self = (const GskInsetShadowNode *) node;
return self->spread;
}
/**
* gsk_inset_shadow_node_get_blur_radius:
* @node: (type GskInsetShadowNode): a `GskRenderNode` for an inset shadow
*
* Retrieves the blur radius to apply to the shadow.
*
* Returns: the blur radius, in pixels
*/
float
gsk_inset_shadow_node_get_blur_radius (const GskRenderNode *node)
{
const GskInsetShadowNode *self = (const GskInsetShadowNode *) node;
return self->blur_radius;
}
/* }}} */
/* {{{ GSK_OUTSET_SHADOW_NODE */
/**
* GskOutsetShadowNode:
*
* A render node for an outset shadow.
*/
struct _GskOutsetShadowNode
{
GskRenderNode render_node;
GskRoundedRect outline;
GdkRGBA color;
float dx;
float dy;
float spread;
float blur_radius;
};
static void
gsk_outset_shadow_get_extents (GskOutsetShadowNode *self,
float *top,
float *right,
float *bottom,
float *left)
{
float clip_radius;
clip_radius = gsk_cairo_blur_compute_pixels (ceil (self->blur_radius / 2.0));
*top = MAX (0, ceil (clip_radius + self->spread - self->dy));
*right = MAX (0, ceil (clip_radius + self->spread + self->dx));
*bottom = MAX (0, ceil (clip_radius + self->spread + self->dy));
*left = MAX (0, ceil (clip_radius + self->spread - self->dx));
}
static void
gsk_outset_shadow_node_draw (GskRenderNode *node,
cairo_t *cr)
{
GskOutsetShadowNode *self = (GskOutsetShadowNode *) node;
GskRoundedRect box, clip_box;
int clip_radius;
graphene_rect_t clip_rect;
float top, right, bottom, left;
double blur_radius;
/* We don't need to draw invisible shadows */
if (gdk_rgba_is_clear (&self->color))
return;
_graphene_rect_init_from_clip_extents (&clip_rect, cr);
if (!gsk_rounded_rect_intersects_rect (&self->outline, &clip_rect))
return;
blur_radius = self->blur_radius / 2;
clip_radius = gsk_cairo_blur_compute_pixels (blur_radius);
cairo_save (cr);
gsk_rounded_rect_init_copy (&clip_box, &self->outline);
gsk_outset_shadow_get_extents (self, &top, &right, &bottom, &left);
gsk_rounded_rect_shrink (&clip_box, -top, -right, -bottom, -left);
cairo_set_fill_rule (cr, CAIRO_FILL_RULE_EVEN_ODD);
gsk_rounded_rect_path (&self->outline, cr);
gsk_cairo_rectangle (cr, &clip_box.bounds);
cairo_clip (cr);
gsk_rounded_rect_init_copy (&box, &self->outline);
gsk_rounded_rect_offset (&box, self->dx, self->dy);
gsk_rounded_rect_shrink (&box, -self->spread, -self->spread, -self->spread, -self->spread);
if (!needs_blur (blur_radius))
draw_shadow (cr, FALSE, &box, &clip_box, blur_radius, &self->color, GSK_BLUR_NONE);
else
{
int i;
cairo_region_t *remaining;
cairo_rectangle_int_t r;
/* For the blurred case we divide the rendering into 9 parts,
* 4 of the corners, 4 for the horizonat/vertical lines and
* one for the interior. We make the non-interior parts
* large enough to fit the full radius of the blur, so that
* the interior part can be drawn solidly.
*/
/* In the outset case we want to paint the entire box, plus as far
* as the radius reaches from it */
r.x = floor (box.bounds.origin.x - clip_radius);
r.y = floor (box.bounds.origin.y - clip_radius);
r.width = ceil (box.bounds.origin.x + box.bounds.size.width + clip_radius) - r.x;
r.height = ceil (box.bounds.origin.y + box.bounds.size.height + clip_radius) - r.y;
remaining = cairo_region_create_rectangle (&r);
/* First do the corners of box */
for (i = 0; i < 4; i++)
{
cairo_save (cr);
/* Always clip with remaining to ensure we never draw any area twice */
gdk_cairo_region (cr, remaining);
cairo_clip (cr);
draw_shadow_corner (cr, FALSE, &box, &clip_box, blur_radius, &self->color, i, &r);
cairo_restore (cr);
/* We drew the region, remove it from remaining */
cairo_region_subtract_rectangle (remaining, &r);
}
/* Then the sides */
for (i = 0; i < 4; i++)
{
cairo_save (cr);
/* Always clip with remaining to ensure we never draw any area twice */
gdk_cairo_region (cr, remaining);
cairo_clip (cr);
draw_shadow_side (cr, FALSE, &box, &clip_box, blur_radius, &self->color, i, &r);
cairo_restore (cr);
/* We drew the region, remove it from remaining */
cairo_region_subtract_rectangle (remaining, &r);
}
/* Then the rest, which needs no blurring */
cairo_save (cr);
gdk_cairo_region (cr, remaining);
cairo_clip (cr);
draw_shadow (cr, FALSE, &box, &clip_box, blur_radius, &self->color, GSK_BLUR_NONE);
cairo_restore (cr);
cairo_region_destroy (remaining);
}
cairo_restore (cr);
}
static void
gsk_outset_shadow_node_diff (GskRenderNode *node1,
GskRenderNode *node2,
cairo_region_t *region)
{
GskOutsetShadowNode *self1 = (GskOutsetShadowNode *) node1;
GskOutsetShadowNode *self2 = (GskOutsetShadowNode *) node2;
if (gsk_rounded_rect_equal (&self1->outline, &self2->outline) &&
gdk_rgba_equal (&self1->color, &self2->color) &&
self1->dx == self2->dx &&
self1->dy == self2->dy &&
self1->spread == self2->spread &&
self1->blur_radius == self2->blur_radius)
return;
gsk_render_node_diff_impossible (node1, node2, region);
}
static void
gsk_outset_shadow_node_class_init (gpointer g_class,
gpointer class_data)
{
GskRenderNodeClass *node_class = g_class;
node_class->node_type = GSK_OUTSET_SHADOW_NODE;
node_class->draw = gsk_outset_shadow_node_draw;
node_class->diff = gsk_outset_shadow_node_diff;
}
/**
* gsk_outset_shadow_node_new:
* @outline: outline of the region surrounded by shadow
* @color: color of the shadow
* @dx: horizontal offset of shadow
* @dy: vertical offset of shadow
* @spread: how far the shadow spreads towards the inside
* @blur_radius: how much blur to apply to the shadow
*
* Creates a `GskRenderNode` that will render an outset shadow
* around the box given by @outline.
*
* Returns: (transfer full) (type GskOutsetShadowNode): A new `GskRenderNode`
*/
GskRenderNode *
gsk_outset_shadow_node_new (const GskRoundedRect *outline,
const GdkRGBA *color,
float dx,
float dy,
float spread,
float blur_radius)
{
GskOutsetShadowNode *self;
GskRenderNode *node;
float top, right, bottom, left;
g_return_val_if_fail (outline != NULL, NULL);
g_return_val_if_fail (color != NULL, NULL);
g_return_val_if_fail (blur_radius >= 0, NULL);
self = gsk_render_node_alloc (GSK_OUTSET_SHADOW_NODE);
node = (GskRenderNode *) self;
node->offscreen_for_opacity = FALSE;
gsk_rounded_rect_init_copy (&self->outline, outline);
self->color = *color;
self->dx = dx;
self->dy = dy;
self->spread = spread;
self->blur_radius = blur_radius;
gsk_outset_shadow_get_extents (self, &top, &right, &bottom, &left);
graphene_rect_init_from_rect (&node->bounds, &self->outline.bounds);
node->bounds.origin.x -= left;
node->bounds.origin.y -= top;
node->bounds.size.width += left + right;
node->bounds.size.height += top + bottom;
return node;
}
/**
* gsk_outset_shadow_node_get_outline:
* @node: (type GskOutsetShadowNode): a `GskRenderNode` for an outset shadow
*
* Retrieves the outline rectangle of the outset shadow.
*
* Returns: (transfer none): a rounded rectangle
*/
const GskRoundedRect *
gsk_outset_shadow_node_get_outline (const GskRenderNode *node)
{
const GskOutsetShadowNode *self = (const GskOutsetShadowNode *) node;
return &self->outline;
}
/**
* gsk_outset_shadow_node_get_color:
* @node: (type GskOutsetShadowNode): a `GskRenderNode` for an outset shadow
*
* Retrieves the color of the outset shadow.
*
* Returns: (transfer none): a color
*/
const GdkRGBA *
gsk_outset_shadow_node_get_color (const GskRenderNode *node)
{
const GskOutsetShadowNode *self = (const GskOutsetShadowNode *) node;
return &self->color;
}
/**
* gsk_outset_shadow_node_get_dx:
* @node: (type GskOutsetShadowNode): a `GskRenderNode` for an outset shadow
*
* Retrieves the horizontal offset of the outset shadow.
*
* Returns: an offset, in pixels
*/
float
gsk_outset_shadow_node_get_dx (const GskRenderNode *node)
{
const GskOutsetShadowNode *self = (const GskOutsetShadowNode *) node;
return self->dx;
}
/**
* gsk_outset_shadow_node_get_dy:
* @node: (type GskOutsetShadowNode): a `GskRenderNode` for an outset shadow
*
* Retrieves the vertical offset of the outset shadow.
*
* Returns: an offset, in pixels
*/
float
gsk_outset_shadow_node_get_dy (const GskRenderNode *node)
{
const GskOutsetShadowNode *self = (const GskOutsetShadowNode *) node;
return self->dy;
}
/**
* gsk_outset_shadow_node_get_spread:
* @node: (type GskOutsetShadowNode): a `GskRenderNode` for an outset shadow
*
* Retrieves how much the shadow spreads outwards.
*
* Returns: the size of the shadow, in pixels
*/
float
gsk_outset_shadow_node_get_spread (const GskRenderNode *node)
{
const GskOutsetShadowNode *self = (const GskOutsetShadowNode *) node;
return self->spread;
}
/**
* gsk_outset_shadow_node_get_blur_radius:
* @node: (type GskOutsetShadowNode): a `GskRenderNode` for an outset shadow
*
* Retrieves the blur radius of the shadow.
*
* Returns: the blur radius, in pixels
*/
float
gsk_outset_shadow_node_get_blur_radius (const GskRenderNode *node)
{
const GskOutsetShadowNode *self = (const GskOutsetShadowNode *) node;
return self->blur_radius;
}
/* }}} */
/* {{{ GSK_CAIRO_NODE */
/**
* GskCairoNode:
*
* A render node for a Cairo surface.
*/
struct _GskCairoNode
{
GskRenderNode render_node;
cairo_surface_t *surface;
};
static void
gsk_cairo_node_finalize (GskRenderNode *node)
{
GskCairoNode *self = (GskCairoNode *) node;
GskRenderNodeClass *parent_class = g_type_class_peek (g_type_parent (GSK_TYPE_CAIRO_NODE));
if (self->surface)
cairo_surface_destroy (self->surface);
parent_class->finalize (node);
}
static void
gsk_cairo_node_draw (GskRenderNode *node,
cairo_t *cr)
{
GskCairoNode *self = (GskCairoNode *) node;
if (self->surface == NULL)
return;
cairo_set_source_surface (cr, self->surface, 0, 0);
cairo_paint (cr);
}
static void
gsk_cairo_node_class_init (gpointer g_class,
gpointer class_data)
{
GskRenderNodeClass *node_class = g_class;
node_class->node_type = GSK_CAIRO_NODE;
node_class->finalize = gsk_cairo_node_finalize;
node_class->draw = gsk_cairo_node_draw;
}
/**
* gsk_cairo_node_get_surface:
* @node: (type GskCairoNode): a `GskRenderNode` for a Cairo surface
*
* Retrieves the Cairo surface used by the render node.
*
* Returns: (transfer none): a Cairo surface
*/
cairo_surface_t *
gsk_cairo_node_get_surface (GskRenderNode *node)
{
GskCairoNode *self = (GskCairoNode *) node;
g_return_val_if_fail (GSK_IS_RENDER_NODE_TYPE (node, GSK_CAIRO_NODE), NULL);
return self->surface;
}
/**
* gsk_cairo_node_new:
* @bounds: the rectangle to render to
*
* Creates a `GskRenderNode` that will render a cairo surface
* into the area given by @bounds.
*
* You can draw to the cairo surface using [method@Gsk.CairoNode.get_draw_context].
*
* Returns: (transfer full) (type GskCairoNode): A new `GskRenderNode`
*/
GskRenderNode *
gsk_cairo_node_new (const graphene_rect_t *bounds)
{
GskCairoNode *self;
GskRenderNode *node;
g_return_val_if_fail (bounds != NULL, NULL);
self = gsk_render_node_alloc (GSK_CAIRO_NODE);
node = (GskRenderNode *) self;
node->offscreen_for_opacity = FALSE;
graphene_rect_init_from_rect (&node->bounds, bounds);
return node;
}
/**
* gsk_cairo_node_get_draw_context:
* @node: (type GskCairoNode): a `GskRenderNode` for a Cairo surface
*
* Creates a Cairo context for drawing using the surface associated
* to the render node.
*
* If no surface exists yet, a surface will be created optimized for
* rendering to @renderer.
*
* Returns: (transfer full): a Cairo context used for drawing; use
* cairo_destroy() when done drawing
*/
cairo_t *
gsk_cairo_node_get_draw_context (GskRenderNode *node)
{
GskCairoNode *self = (GskCairoNode *) node;
int width, height;
cairo_t *res;
g_return_val_if_fail (GSK_IS_RENDER_NODE_TYPE (node, GSK_CAIRO_NODE), NULL);
width = ceilf (node->bounds.size.width);
height = ceilf (node->bounds.size.height);
if (width <= 0 || height <= 0)
{
cairo_surface_t *surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, 0, 0);
res = cairo_create (surface);
cairo_surface_destroy (surface);
}
else if (self->surface == NULL)
{
self->surface = cairo_recording_surface_create (CAIRO_CONTENT_COLOR_ALPHA,
&(cairo_rectangle_t) {
node->bounds.origin.x,
node->bounds.origin.y,
node->bounds.size.width,
node->bounds.size.height
});
res = cairo_create (self->surface);
}
else
{
res = cairo_create (self->surface);
}
gsk_cairo_rectangle (res, &node->bounds);
cairo_clip (res);
return res;
}
/* }}} */
/* {{{ GSK_CONTAINER_NODE */
/**
* GskContainerNode:
*
* A render node that can contain other render nodes.
*/
struct _GskContainerNode
{
GskRenderNode render_node;
gboolean disjoint;
guint n_children;
GskRenderNode **children;
};
static void
gsk_container_node_finalize (GskRenderNode *node)
{
GskContainerNode *container = (GskContainerNode *) node;
GskRenderNodeClass *parent_class = g_type_class_peek (g_type_parent (GSK_TYPE_CONTAINER_NODE));
for (guint i = 0; i < container->n_children; i++)
gsk_render_node_unref (container->children[i]);
g_free (container->children);
parent_class->finalize (node);
}
static void
gsk_container_node_draw (GskRenderNode *node,
cairo_t *cr)
{
GskContainerNode *container = (GskContainerNode *) node;
guint i;
for (i = 0; i < container->n_children; i++)
{
gsk_render_node_draw (container->children[i], cr);
}
}
static int
gsk_container_node_compare_func (gconstpointer elem1, gconstpointer elem2, gpointer data)
{
return gsk_render_node_can_diff ((const GskRenderNode *) elem1, (const GskRenderNode *) elem2) ? 0 : 1;
}
static GskDiffResult
gsk_container_node_keep_func (gconstpointer elem1, gconstpointer elem2, gpointer data)
{
gsk_render_node_diff ((GskRenderNode *) elem1, (GskRenderNode *) elem2, data);
if (cairo_region_num_rectangles (data) > MAX_RECTS_IN_DIFF)
return GSK_DIFF_ABORTED;
return GSK_DIFF_OK;
}
static GskDiffResult
gsk_container_node_change_func (gconstpointer elem, gsize idx, gpointer data)
{
const GskRenderNode *node = elem;
cairo_region_t *region = data;
cairo_rectangle_int_t rect;
rectangle_init_from_graphene (&rect, &node->bounds);
cairo_region_union_rectangle (region, &rect);
if (cairo_region_num_rectangles (region) > MAX_RECTS_IN_DIFF)
return GSK_DIFF_ABORTED;
return GSK_DIFF_OK;
}
static GskDiffSettings *
gsk_container_node_get_diff_settings (void)
{
static GskDiffSettings *settings = NULL;
if (G_LIKELY (settings))
return settings;
settings = gsk_diff_settings_new (gsk_container_node_compare_func,
gsk_container_node_keep_func,
gsk_container_node_change_func,
gsk_container_node_change_func);
gsk_diff_settings_set_allow_abort (settings, TRUE);
return settings;
}
static gboolean
gsk_render_node_diff_multiple (GskRenderNode **nodes1,
gsize n_nodes1,
GskRenderNode **nodes2,
gsize n_nodes2,
cairo_region_t *region)
{
return gsk_diff ((gconstpointer *) nodes1, n_nodes1,
(gconstpointer *) nodes2, n_nodes2,
gsk_container_node_get_diff_settings (),
region) == GSK_DIFF_OK;
}
void
gsk_container_node_diff_with (GskRenderNode *container,
GskRenderNode *other,
cairo_region_t *region)
{
GskContainerNode *self = (GskContainerNode *) container;
if (gsk_render_node_diff_multiple (self->children,
self->n_children,
&other,
1,
region))
return;
gsk_render_node_diff_impossible (container, other, region);
}
static void
gsk_container_node_diff (GskRenderNode *node1,
GskRenderNode *node2,
cairo_region_t *region)
{
GskContainerNode *self1 = (GskContainerNode *) node1;
GskContainerNode *self2 = (GskContainerNode *) node2;
if (gsk_render_node_diff_multiple (self1->children,
self1->n_children,
self2->children,
self2->n_children,
region))
return;
gsk_render_node_diff_impossible (node1, node2, region);
}
static void
gsk_container_node_class_init (gpointer g_class,
gpointer class_data)
{
GskRenderNodeClass *node_class = g_class;
node_class->node_type = GSK_CONTAINER_NODE;
node_class->finalize = gsk_container_node_finalize;
node_class->draw = gsk_container_node_draw;
node_class->diff = gsk_container_node_diff;
}
/**
* gsk_container_node_new:
* @children: (array length=n_children) (transfer none): The children of the node
* @n_children: Number of children in the @children array
*
* Creates a new `GskRenderNode` instance for holding the given @children.
*
* The new node will acquire a reference to each of the children.
*
* Returns: (transfer full) (type GskContainerNode): the new `GskRenderNode`
*/
GskRenderNode *
gsk_container_node_new (GskRenderNode **children,
guint n_children)
{
GskContainerNode *self;
GskRenderNode *node;
self = gsk_render_node_alloc (GSK_CONTAINER_NODE);
node = (GskRenderNode *) self;
self->disjoint = TRUE;
self->n_children = n_children;
if (n_children == 0)
{
graphene_rect_init_from_rect (&node->bounds, graphene_rect_zero ());
}
else
{
graphene_rect_t bounds;
self->children = g_malloc_n (n_children, sizeof (GskRenderNode *));
self->children[0] = gsk_render_node_ref (children[0]);
graphene_rect_init_from_rect (&bounds, &(children[0]->bounds));
node->preferred_depth = gdk_memory_depth_merge (node->preferred_depth,
gsk_render_node_get_preferred_depth (children[0]));
for (guint i = 1; i < n_children; i++)
{
self->children[i] = gsk_render_node_ref (children[i]);
self->disjoint = self->disjoint && !graphene_rect_intersection (&bounds, &(children[i]->bounds), NULL);
graphene_rect_union (&bounds, &(children[i]->bounds), &bounds);
node->preferred_depth = gdk_memory_depth_merge (node->preferred_depth,
gsk_render_node_get_preferred_depth (children[i]));
node->offscreen_for_opacity = node->offscreen_for_opacity || children[i]->offscreen_for_opacity;
}
graphene_rect_init_from_rect (&node->bounds, &bounds);
node->offscreen_for_opacity = node->offscreen_for_opacity || !self->disjoint;
}
return node;
}
/**
* gsk_container_node_get_n_children:
* @node: (type GskContainerNode): a container `GskRenderNode`
*
* Retrieves the number of direct children of @node.
*
* Returns: the number of children of the `GskRenderNode`
*/
guint
gsk_container_node_get_n_children (const GskRenderNode *node)
{
const GskContainerNode *self = (const GskContainerNode *) node;
return self->n_children;
}
/**
* gsk_container_node_get_child:
* @node: (type GskContainerNode): a container `GskRenderNode`
* @idx: the position of the child to get
*
* Gets one of the children of @container.
*
* Returns: (transfer none): the @idx'th child of @container
*/
GskRenderNode *
gsk_container_node_get_child (const GskRenderNode *node,
guint idx)
{
const GskContainerNode *self = (const GskContainerNode *) node;
g_return_val_if_fail (GSK_IS_RENDER_NODE_TYPE (node, GSK_CONTAINER_NODE), NULL);
g_return_val_if_fail (idx < self->n_children, NULL);
return self->children[idx];
}
GskRenderNode **
gsk_container_node_get_children (const GskRenderNode *node,
guint *n_children)
{
const GskContainerNode *self = (const GskContainerNode *) node;
*n_children = self->n_children;
return self->children;
}
/*< private>
* gsk_container_node_is_disjoint:
* @node: a container `GskRenderNode`
*
* Returns `TRUE` if it is known that the child nodes are not
* overlapping. There is no guarantee that they do overlap
* if this function return FALSE.
*
* Returns: `TRUE` if children don't overlap
*/
gboolean
gsk_container_node_is_disjoint (const GskRenderNode *node)
{
const GskContainerNode *self = (const GskContainerNode *) node;
return self->disjoint;
}
/* }}} */
/* {{{ GSK_TRANSFORM_NODE */
/**
* GskTransformNode:
*
* A render node applying a `GskTransform` to its single child node.
*/
struct _GskTransformNode
{
GskRenderNode render_node;
GskRenderNode *child;
GskTransform *transform;
float dx, dy;
};
static void
gsk_transform_node_finalize (GskRenderNode *node)
{
GskTransformNode *self = (GskTransformNode *) node;
GskRenderNodeClass *parent_class = g_type_class_peek (g_type_parent (GSK_TYPE_TRANSFORM_NODE));
gsk_render_node_unref (self->child);
gsk_transform_unref (self->transform);
parent_class->finalize (node);
}
static void
gsk_transform_node_draw (GskRenderNode *node,
cairo_t *cr)
{
GskTransformNode *self = (GskTransformNode *) node;
float xx, yx, xy, yy, dx, dy;
cairo_matrix_t ctm;
if (gsk_transform_get_category (self->transform) < GSK_TRANSFORM_CATEGORY_2D)
{
cairo_set_source_rgb (cr, 255 / 255., 105 / 255., 180 / 255.);
gsk_cairo_rectangle (cr, &node->bounds);
cairo_fill (cr);
return;
}
gsk_transform_to_2d (self->transform, &xx, &yx, &xy, &yy, &dx, &dy);
cairo_matrix_init (&ctm, xx, yx, xy, yy, dx, dy);
GSK_DEBUG (CAIRO, "CTM = { .xx = %g, .yx = %g, .xy = %g, .yy = %g, .x0 = %g, .y0 = %g }",
ctm.xx, ctm.yx,
ctm.xy, ctm.yy,
ctm.x0, ctm.y0);
if (xx * yy == xy * yx)
{
/* broken matrix here. This can happen during transitions
* (like when flipping an axis at the point where scale == 0)
* and just means that nothing should be drawn.
* But Cairo throws lots of ugly errors instead of silently
* going on. So We silently go on.
*/
return;
}
cairo_transform (cr, &ctm);
gsk_render_node_draw (self->child, cr);
}
static gboolean
gsk_transform_node_can_diff (const GskRenderNode *node1,
const GskRenderNode *node2)
{
GskTransformNode *self1 = (GskTransformNode *) node1;
GskTransformNode *self2 = (GskTransformNode *) node2;
if (!gsk_transform_equal (self1->transform, self2->transform))
return FALSE;
return gsk_render_node_can_diff (self1->child, self2->child);
}
static void
gsk_transform_node_diff (GskRenderNode *node1,
GskRenderNode *node2,
cairo_region_t *region)
{
GskTransformNode *self1 = (GskTransformNode *) node1;
GskTransformNode *self2 = (GskTransformNode *) node2;
if (!gsk_transform_equal (self1->transform, self2->transform))
{
gsk_render_node_diff_impossible (node1, node2, region);
return;
}
if (self1->child == self2->child)
return;
switch (gsk_transform_get_category (self1->transform))
{
case GSK_TRANSFORM_CATEGORY_IDENTITY:
gsk_render_node_diff (self1->child, self2->child, region);
break;
case GSK_TRANSFORM_CATEGORY_2D_TRANSLATE:
{
cairo_region_t *sub;
float dx, dy;
gsk_transform_to_translate (self1->transform, &dx, &dy);
sub = cairo_region_create ();
gsk_render_node_diff (self1->child, self2->child, sub);
cairo_region_translate (sub, floorf (dx), floorf (dy));
if (floorf (dx) != dx)
{
cairo_region_t *tmp = cairo_region_copy (sub);
cairo_region_translate (tmp, 1, 0);
cairo_region_union (sub, tmp);
cairo_region_destroy (tmp);
}
if (floorf (dy) != dy)
{
cairo_region_t *tmp = cairo_region_copy (sub);
cairo_region_translate (tmp, 0, 1);
cairo_region_union (sub, tmp);
cairo_region_destroy (tmp);
}
cairo_region_union (region, sub);
cairo_region_destroy (sub);
}
break;
case GSK_TRANSFORM_CATEGORY_2D_AFFINE:
{
cairo_region_t *sub;
float scale_x, scale_y, dx, dy;
gsk_transform_to_affine (self1->transform, &scale_x, &scale_y, &dx, &dy);
sub = cairo_region_create ();
gsk_render_node_diff (self1->child, self2->child, sub);
region_union_region_affine (region, sub, scale_x, scale_y, dx, dy);
cairo_region_destroy (sub);
}
break;
case GSK_TRANSFORM_CATEGORY_UNKNOWN:
case GSK_TRANSFORM_CATEGORY_ANY:
case GSK_TRANSFORM_CATEGORY_3D:
case GSK_TRANSFORM_CATEGORY_2D:
default:
gsk_render_node_diff_impossible (node1, node2, region);
break;
}
}
static void
gsk_transform_node_class_init (gpointer g_class,
gpointer class_data)
{
GskRenderNodeClass *node_class = g_class;
node_class->node_type = GSK_TRANSFORM_NODE;
node_class->finalize = gsk_transform_node_finalize;
node_class->draw = gsk_transform_node_draw;
node_class->can_diff = gsk_transform_node_can_diff;
node_class->diff = gsk_transform_node_diff;
}
/**
* gsk_transform_node_new:
* @child: The node to transform
* @transform: (transfer none): The transform to apply
*
* Creates a `GskRenderNode` that will transform the given @child
* with the given @transform.
*
* Returns: (transfer full) (type GskTransformNode): A new `GskRenderNode`
*/
GskRenderNode *
gsk_transform_node_new (GskRenderNode *child,
GskTransform *transform)
{
GskTransformNode *self;
GskRenderNode *node;
g_return_val_if_fail (GSK_IS_RENDER_NODE (child), NULL);
g_return_val_if_fail (transform != NULL, NULL);
self = gsk_render_node_alloc (GSK_TRANSFORM_NODE);
node = (GskRenderNode *) self;
node->offscreen_for_opacity = child->offscreen_for_opacity;
self->child = gsk_render_node_ref (child);
self->transform = gsk_transform_ref (transform);
if (gsk_transform_get_category (transform) >= GSK_TRANSFORM_CATEGORY_2D_TRANSLATE)
gsk_transform_to_translate (transform, &self->dx, &self->dy);
else
self->dx = self->dy = 0;
gsk_transform_transform_bounds (self->transform,
&child->bounds,
&node->bounds);
node->preferred_depth = gsk_render_node_get_preferred_depth (child);
return node;
}
/**
* gsk_transform_node_get_child:
* @node: (type GskTransformNode): a `GskRenderNode` for a transform
*
* Gets the child node that is getting transformed by the given @node.
*
* Returns: (transfer none): The child that is getting transformed
*/
GskRenderNode *
gsk_transform_node_get_child (const GskRenderNode *node)
{
const GskTransformNode *self = (const GskTransformNode *) node;
return self->child;
}
/**
* gsk_transform_node_get_transform:
* @node: (type GskTransformNode): a `GskRenderNode` for a transform
*
* Retrieves the `GskTransform` used by the @node.
*
* Returns: (transfer none): a `GskTransform`
*/
GskTransform *
gsk_transform_node_get_transform (const GskRenderNode *node)
{
const GskTransformNode *self = (const GskTransformNode *) node;
return self->transform;
}
void
gsk_transform_node_get_translate (const GskRenderNode *node,
float *dx,
float *dy)
{
const GskTransformNode *self = (const GskTransformNode *) node;
*dx = self->dx;
*dy = self->dy;
}
/* }}} */
/* {{{ GSK_OPACITY_NODE */
/**
* GskOpacityNode:
*
* A render node controlling the opacity of its single child node.
*/
struct _GskOpacityNode
{
GskRenderNode render_node;
GskRenderNode *child;
float opacity;
};
static void
gsk_opacity_node_finalize (GskRenderNode *node)
{
GskOpacityNode *self = (GskOpacityNode *) node;
GskRenderNodeClass *parent_class = g_type_class_peek (g_type_parent (GSK_TYPE_OPACITY_NODE));
gsk_render_node_unref (self->child);
parent_class->finalize (node);
}
static void
gsk_opacity_node_draw (GskRenderNode *node,
cairo_t *cr)
{
GskOpacityNode *self = (GskOpacityNode *) node;
cairo_save (cr);
/* clip so the push_group() creates a smaller surface */
gsk_cairo_rectangle (cr, &node->bounds);
cairo_clip (cr);
cairo_push_group (cr);
gsk_render_node_draw (self->child, cr);
cairo_pop_group_to_source (cr);
cairo_paint_with_alpha (cr, self->opacity);
cairo_restore (cr);
}
static void
gsk_opacity_node_diff (GskRenderNode *node1,
GskRenderNode *node2,
cairo_region_t *region)
{
GskOpacityNode *self1 = (GskOpacityNode *) node1;
GskOpacityNode *self2 = (GskOpacityNode *) node2;
if (self1->opacity == self2->opacity)
gsk_render_node_diff (self1->child, self2->child, region);
else
gsk_render_node_diff_impossible (node1, node2, region);
}
static void
gsk_opacity_node_class_init (gpointer g_class,
gpointer class_data)
{
GskRenderNodeClass *node_class = g_class;
node_class->node_type = GSK_OPACITY_NODE;
node_class->finalize = gsk_opacity_node_finalize;
node_class->draw = gsk_opacity_node_draw;
node_class->diff = gsk_opacity_node_diff;
}
/**
* gsk_opacity_node_new:
* @child: The node to draw
* @opacity: The opacity to apply
*
* Creates a `GskRenderNode` that will drawn the @child with reduced
* @opacity.
*
* Returns: (transfer full) (type GskOpacityNode): A new `GskRenderNode`
*/
GskRenderNode *
gsk_opacity_node_new (GskRenderNode *child,
float opacity)
{
GskOpacityNode *self;
GskRenderNode *node;
g_return_val_if_fail (GSK_IS_RENDER_NODE (child), NULL);
self = gsk_render_node_alloc (GSK_OPACITY_NODE);
node = (GskRenderNode *) self;
node->offscreen_for_opacity = child->offscreen_for_opacity;
self->child = gsk_render_node_ref (child);
self->opacity = CLAMP (opacity, 0.0, 1.0);
graphene_rect_init_from_rect (&node->bounds, &child->bounds);
node->preferred_depth = gsk_render_node_get_preferred_depth (child);
return node;
}
/**
* gsk_opacity_node_get_child:
* @node: (type GskOpacityNode): a `GskRenderNode` for an opacity
*
* Gets the child node that is getting opacityed by the given @node.
*
* Returns: (transfer none): The child that is getting opacityed
*/
GskRenderNode *
gsk_opacity_node_get_child (const GskRenderNode *node)
{
const GskOpacityNode *self = (const GskOpacityNode *) node;
return self->child;
}
/**
* gsk_opacity_node_get_opacity:
* @node: (type GskOpacityNode): a `GskRenderNode` for an opacity
*
* Gets the transparency factor for an opacity node.
*
* Returns: the opacity factor
*/
float
gsk_opacity_node_get_opacity (const GskRenderNode *node)
{
const GskOpacityNode *self = (const GskOpacityNode *) node;
return self->opacity;
}
/* }}} */
/* {{{ GSK_COLOR_MATRIX_NODE */
/**
* GskColorMatrixNode:
*
* A render node controlling the color matrix of its single child node.
*/
struct _GskColorMatrixNode
{
GskRenderNode render_node;
GskRenderNode *child;
graphene_matrix_t color_matrix;
graphene_vec4_t color_offset;
};
static void
gsk_color_matrix_node_finalize (GskRenderNode *node)
{
GskColorMatrixNode *self = (GskColorMatrixNode *) node;
GskRenderNodeClass *parent_class = g_type_class_peek (g_type_parent (GSK_TYPE_COLOR_MATRIX_NODE));
gsk_render_node_unref (self->child);
parent_class->finalize (node);
}
static void
apply_color_matrix_to_pattern (cairo_pattern_t *pattern,
const graphene_matrix_t *color_matrix,
const graphene_vec4_t *color_offset)
{
cairo_surface_t *surface, *image_surface;
guchar *data;
gsize x, y, width, height, stride;
float alpha;
graphene_vec4_t pixel;
guint32* pixel_data;
cairo_pattern_get_surface (pattern, &surface);
image_surface = cairo_surface_map_to_image (surface, NULL);
data = cairo_image_surface_get_data (image_surface);
width = cairo_image_surface_get_width (image_surface);
height = cairo_image_surface_get_height (image_surface);
stride = cairo_image_surface_get_stride (image_surface);
for (y = 0; y < height; y++)
{
pixel_data = (guint32 *) data;
for (x = 0; x < width; x++)
{
alpha = ((pixel_data[x] >> 24) & 0xFF) / 255.0;
if (alpha == 0)
{
graphene_vec4_init (&pixel, 0.0, 0.0, 0.0, 0.0);
}
else
{
graphene_vec4_init (&pixel,
((pixel_data[x] >> 16) & 0xFF) / (255.0 * alpha),
((pixel_data[x] >> 8) & 0xFF) / (255.0 * alpha),
( pixel_data[x] & 0xFF) / (255.0 * alpha),
alpha);
graphene_matrix_transform_vec4 (color_matrix, &pixel, &pixel);
}
graphene_vec4_add (&pixel, color_offset, &pixel);
alpha = graphene_vec4_get_w (&pixel);
if (alpha > 0.0)
{
alpha = MIN (alpha, 1.0);
pixel_data[x] = (((guint32) roundf (alpha * 255)) << 24) |
(((guint32) roundf (CLAMP (graphene_vec4_get_x (&pixel), 0, 1) * alpha * 255)) << 16) |
(((guint32) roundf (CLAMP (graphene_vec4_get_y (&pixel), 0, 1) * alpha * 255)) << 8) |
((guint32) roundf (CLAMP (graphene_vec4_get_z (&pixel), 0, 1) * alpha * 255));
}
else
{
pixel_data[x] = 0;
}
}
data += stride;
}
cairo_surface_mark_dirty (image_surface);
cairo_surface_unmap_image (surface, image_surface);
/* https://gitlab.freedesktop.org/cairo/cairo/-/merge_requests/487 */
cairo_surface_mark_dirty (surface);
}
static void
gsk_color_matrix_node_draw (GskRenderNode *node,
cairo_t *cr)
{
GskColorMatrixNode *self = (GskColorMatrixNode *) node;
cairo_pattern_t *pattern;
cairo_save (cr);
/* clip so the push_group() creates a smaller surface */
gsk_cairo_rectangle (cr, &node->bounds);
cairo_clip (cr);
cairo_push_group (cr);
gsk_render_node_draw (self->child, cr);
pattern = cairo_pop_group (cr);
apply_color_matrix_to_pattern (pattern, &self->color_matrix, &self->color_offset);
cairo_set_source (cr, pattern);
cairo_paint (cr);
cairo_restore (cr);
cairo_pattern_destroy (pattern);
}
static void
gsk_color_matrix_node_diff (GskRenderNode *node1,
GskRenderNode *node2,
cairo_region_t *region)
{
GskColorMatrixNode *self1 = (GskColorMatrixNode *) node1;
GskColorMatrixNode *self2 = (GskColorMatrixNode *) node2;
if (!graphene_vec4_equal (&self1->color_offset, &self2->color_offset))
goto nope;
if (!graphene_matrix_equal_fast (&self1->color_matrix, &self2->color_matrix))
goto nope;
gsk_render_node_diff (self1->child, self2->child, region);
return;
nope:
gsk_render_node_diff_impossible (node1, node2, region);
return;
}
static void
gsk_color_matrix_node_class_init (gpointer g_class,
gpointer class_data)
{
GskRenderNodeClass *node_class = g_class;
node_class->node_type = GSK_COLOR_MATRIX_NODE;
node_class->finalize = gsk_color_matrix_node_finalize;
node_class->draw = gsk_color_matrix_node_draw;
node_class->diff = gsk_color_matrix_node_diff;
}
/**
* gsk_color_matrix_node_new:
* @child: The node to draw
* @color_matrix: The matrix to apply
* @color_offset: Values to add to the color
*
* Creates a `GskRenderNode` that will drawn the @child with
* @color_matrix.
*
* In particular, the node will transform colors by applying
*
* pixel = transpose(color_matrix) * pixel + color_offset
*
* for every pixel. The transformation operates on unpremultiplied
* colors, with color components ordered R, G, B, A.
*
* Returns: (transfer full) (type GskColorMatrixNode): A new `GskRenderNode`
*/
GskRenderNode *
gsk_color_matrix_node_new (GskRenderNode *child,
const graphene_matrix_t *color_matrix,
const graphene_vec4_t *color_offset)
{
GskColorMatrixNode *self;
GskRenderNode *node;
g_return_val_if_fail (GSK_IS_RENDER_NODE (child), NULL);
self = gsk_render_node_alloc (GSK_COLOR_MATRIX_NODE);
node = (GskRenderNode *) self;
node->offscreen_for_opacity = child->offscreen_for_opacity;
self->child = gsk_render_node_ref (child);
graphene_matrix_init_from_matrix (&self->color_matrix, color_matrix);
graphene_vec4_init_from_vec4 (&self->color_offset, color_offset);
graphene_rect_init_from_rect (&node->bounds, &child->bounds);
node->preferred_depth = gsk_render_node_get_preferred_depth (child);
return node;
}
/**
* gsk_color_matrix_node_get_child:
* @node: (type GskColorMatrixNode): a color matrix `GskRenderNode`
*
* Gets the child node that is getting its colors modified by the given @node.
*
* Returns: (transfer none): The child that is getting its colors modified
**/
GskRenderNode *
gsk_color_matrix_node_get_child (const GskRenderNode *node)
{
const GskColorMatrixNode *self = (const GskColorMatrixNode *) node;
return self->child;
}
/**
* gsk_color_matrix_node_get_color_matrix:
* @node: (type GskColorMatrixNode): a color matrix `GskRenderNode`
*
* Retrieves the color matrix used by the @node.
*
* Returns: a 4x4 color matrix
*/
const graphene_matrix_t *
gsk_color_matrix_node_get_color_matrix (const GskRenderNode *node)
{
const GskColorMatrixNode *self = (const GskColorMatrixNode *) node;
return &self->color_matrix;
}
/**
* gsk_color_matrix_node_get_color_offset:
* @node: (type GskColorMatrixNode): a color matrix `GskRenderNode`
*
* Retrieves the color offset used by the @node.
*
* Returns: a color vector
*/
const graphene_vec4_t *
gsk_color_matrix_node_get_color_offset (const GskRenderNode *node)
{
const GskColorMatrixNode *self = (const GskColorMatrixNode *) node;
return &self->color_offset;
}
/* }}} */
/* {{{ GSK_REPEAT_NODE */
/**
* GskRepeatNode:
*
* A render node repeating its single child node.
*/
struct _GskRepeatNode
{
GskRenderNode render_node;
GskRenderNode *child;
graphene_rect_t child_bounds;
};
static void
gsk_repeat_node_finalize (GskRenderNode *node)
{
GskRepeatNode *self = (GskRepeatNode *) node;
GskRenderNodeClass *parent_class = g_type_class_peek (g_type_parent (GSK_TYPE_REPEAT_NODE));
gsk_render_node_unref (self->child);
parent_class->finalize (node);
}
static void
gsk_repeat_node_draw (GskRenderNode *node,
cairo_t *cr)
{
GskRepeatNode *self = (GskRepeatNode *) node;
cairo_pattern_t *pattern;
cairo_surface_t *surface;
cairo_t *surface_cr;
double scale_x, scale_y, width, height;
cairo_matrix_t matrix;
cairo_get_matrix (cr, &matrix);
width = ceil (self->child_bounds.size.width * (ABS (matrix.xx) + ABS (matrix.yx)));
height = ceil (self->child_bounds.size.height * (ABS (matrix.xy) + ABS (matrix.yy)));
surface = cairo_surface_create_similar (cairo_get_target (cr),
CAIRO_CONTENT_COLOR_ALPHA,
width, height);
cairo_surface_get_device_scale (surface, &scale_x, &scale_y);
scale_x *= width / self->child_bounds.size.width;
scale_y *= height / self->child_bounds.size.height;
cairo_surface_set_device_scale (surface, scale_x, scale_y);
cairo_surface_set_device_offset (surface,
- self->child_bounds.origin.x * scale_x,
- self->child_bounds.origin.y * scale_y);
surface_cr = cairo_create (surface);
gsk_render_node_draw (self->child, surface_cr);
cairo_destroy (surface_cr);
pattern = cairo_pattern_create_for_surface (surface);
cairo_pattern_set_extend (pattern, CAIRO_EXTEND_REPEAT);
cairo_set_source (cr, pattern);
cairo_pattern_destroy (pattern);
cairo_surface_destroy (surface);
gsk_cairo_rectangle (cr, &node->bounds);
cairo_fill (cr);
}
static void
gsk_repeat_node_class_init (gpointer g_class,
gpointer class_data)
{
GskRenderNodeClass *node_class = g_class;
node_class->node_type = GSK_REPEAT_NODE;
node_class->finalize = gsk_repeat_node_finalize;
node_class->draw = gsk_repeat_node_draw;
}
/**
* gsk_repeat_node_new:
* @bounds: The bounds of the area to be painted
* @child: The child to repeat
* @child_bounds: (nullable): The area of the child to repeat or %NULL to
* use the child's bounds
*
* Creates a `GskRenderNode` that will repeat the drawing of @child across
* the given @bounds.
*
* Returns: (transfer full) (type GskRepeatNode): A new `GskRenderNode`
*/
GskRenderNode *
gsk_repeat_node_new (const graphene_rect_t *bounds,
GskRenderNode *child,
const graphene_rect_t *child_bounds)
{
GskRepeatNode *self;
GskRenderNode *node;
g_return_val_if_fail (bounds != NULL, NULL);
g_return_val_if_fail (GSK_IS_RENDER_NODE (child), NULL);
self = gsk_render_node_alloc (GSK_REPEAT_NODE);
node = (GskRenderNode *) self;
node->offscreen_for_opacity = TRUE;
graphene_rect_init_from_rect (&node->bounds, bounds);
self->child = gsk_render_node_ref (child);
if (child_bounds)
graphene_rect_init_from_rect (&self->child_bounds, child_bounds);
else
graphene_rect_init_from_rect (&self->child_bounds, &child->bounds);
node->preferred_depth = gsk_render_node_get_preferred_depth (child);
return node;
}
/**
* gsk_repeat_node_get_child:
* @node: (type GskRepeatNode): a repeat `GskRenderNode`
*
* Retrieves the child of @node.
*
* Returns: (transfer none): a `GskRenderNode`
*/
GskRenderNode *
gsk_repeat_node_get_child (const GskRenderNode *node)
{
const GskRepeatNode *self = (const GskRepeatNode *) node;
return self->child;
}
/**
* gsk_repeat_node_get_child_bounds:
* @node: (type GskRepeatNode): a repeat `GskRenderNode`
*
* Retrieves the bounding rectangle of the child of @node.
*
* Returns: (transfer none): a bounding rectangle
*/
const graphene_rect_t *
gsk_repeat_node_get_child_bounds (const GskRenderNode *node)
{
const GskRepeatNode *self = (const GskRepeatNode *) node;
return &self->child_bounds;
}
/* }}} */
/* {{{ GSK_CLIP_NODE */
/**
* GskClipNode:
*
* A render node applying a rectangular clip to its single child node.
*/
struct _GskClipNode
{
GskRenderNode render_node;
GskRenderNode *child;
graphene_rect_t clip;
};
static void
gsk_clip_node_finalize (GskRenderNode *node)
{
GskClipNode *self = (GskClipNode *) node;
GskRenderNodeClass *parent_class = g_type_class_peek (g_type_parent (GSK_TYPE_CLIP_NODE));
gsk_render_node_unref (self->child);
parent_class->finalize (node);
}
static void
gsk_clip_node_draw (GskRenderNode *node,
cairo_t *cr)
{
GskClipNode *self = (GskClipNode *) node;
cairo_save (cr);
gsk_cairo_rectangle (cr, &self->clip);
cairo_clip (cr);
gsk_render_node_draw (self->child, cr);
cairo_restore (cr);
}
static void
gsk_clip_node_diff (GskRenderNode *node1,
GskRenderNode *node2,
cairo_region_t *region)
{
GskClipNode *self1 = (GskClipNode *) node1;
GskClipNode *self2 = (GskClipNode *) node2;
if (graphene_rect_equal (&self1->clip, &self2->clip))
{
cairo_region_t *sub;
cairo_rectangle_int_t clip_rect;
sub = cairo_region_create();
gsk_render_node_diff (self1->child, self2->child, sub);
rectangle_init_from_graphene (&clip_rect, &self1->clip);
cairo_region_intersect_rectangle (sub, &clip_rect);
cairo_region_union (region, sub);
cairo_region_destroy (sub);
}
else
{
gsk_render_node_diff_impossible (node1, node2, region);
}
}
static void
gsk_clip_node_class_init (gpointer g_class,
gpointer class_data)
{
GskRenderNodeClass *node_class = g_class;
node_class->node_type = GSK_CLIP_NODE;
node_class->finalize = gsk_clip_node_finalize;
node_class->draw = gsk_clip_node_draw;
node_class->diff = gsk_clip_node_diff;
}
/**
* gsk_clip_node_new:
* @child: The node to draw
* @clip: The clip to apply
*
* Creates a `GskRenderNode` that will clip the @child to the area
* given by @clip.
*
* Returns: (transfer full) (type GskClipNode): A new `GskRenderNode`
*/
GskRenderNode *
gsk_clip_node_new (GskRenderNode *child,
const graphene_rect_t *clip)
{
GskClipNode *self;
GskRenderNode *node;
g_return_val_if_fail (GSK_IS_RENDER_NODE (child), NULL);
g_return_val_if_fail (clip != NULL, NULL);
self = gsk_render_node_alloc (GSK_CLIP_NODE);
node = (GskRenderNode *) self;
node->offscreen_for_opacity = child->offscreen_for_opacity;
self->child = gsk_render_node_ref (child);
graphene_rect_normalize_r (clip, &self->clip);
graphene_rect_intersection (&self->clip, &child->bounds, &node->bounds);
node->preferred_depth = gsk_render_node_get_preferred_depth (child);
return node;
}
/**
* gsk_clip_node_get_child:
* @node: (type GskClipNode): a clip @GskRenderNode
*
* Gets the child node that is getting clipped by the given @node.
*
* Returns: (transfer none): The child that is getting clipped
**/
GskRenderNode *
gsk_clip_node_get_child (const GskRenderNode *node)
{
const GskClipNode *self = (const GskClipNode *) node;
return self->child;
}
/**
* gsk_clip_node_get_clip:
* @node: (type GskClipNode): a `GskClipNode`
*
* Retrieves the clip rectangle for @node.
*
* Returns: a clip rectangle
*/
const graphene_rect_t *
gsk_clip_node_get_clip (const GskRenderNode *node)
{
const GskClipNode *self = (const GskClipNode *) node;
return &self->clip;
}
/* }}} */
/* {{{ GSK_ROUNDED_CLIP_NODE */
/**
* GskRoundedClipNode:
*
* A render node applying a rounded rectangle clip to its single child.
*/
struct _GskRoundedClipNode
{
GskRenderNode render_node;
GskRenderNode *child;
GskRoundedRect clip;
};
static void
gsk_rounded_clip_node_finalize (GskRenderNode *node)
{
GskRoundedClipNode *self = (GskRoundedClipNode *) node;
GskRenderNodeClass *parent_class = g_type_class_peek (g_type_parent (GSK_TYPE_ROUNDED_CLIP_NODE));
gsk_render_node_unref (self->child);
parent_class->finalize (node);
}
static void
gsk_rounded_clip_node_draw (GskRenderNode *node,
cairo_t *cr)
{
GskRoundedClipNode *self = (GskRoundedClipNode *) node;
cairo_save (cr);
gsk_rounded_rect_path (&self->clip, cr);
cairo_clip (cr);
gsk_render_node_draw (self->child, cr);
cairo_restore (cr);
}
static void
gsk_rounded_clip_node_diff (GskRenderNode *node1,
GskRenderNode *node2,
cairo_region_t *region)
{
GskRoundedClipNode *self1 = (GskRoundedClipNode *) node1;
GskRoundedClipNode *self2 = (GskRoundedClipNode *) node2;
if (gsk_rounded_rect_equal (&self1->clip, &self2->clip))
{
cairo_region_t *sub;
cairo_rectangle_int_t clip_rect;
sub = cairo_region_create();
gsk_render_node_diff (self1->child, self2->child, sub);
rectangle_init_from_graphene (&clip_rect, &self1->clip.bounds);
cairo_region_intersect_rectangle (sub, &clip_rect);
cairo_region_union (region, sub);
cairo_region_destroy (sub);
}
else
{
gsk_render_node_diff_impossible (node1, node2, region);
}
}
static void
gsk_rounded_clip_node_class_init (gpointer g_class,
gpointer class_data)
{
GskRenderNodeClass *node_class = g_class;
node_class->node_type = GSK_ROUNDED_CLIP_NODE;
node_class->finalize = gsk_rounded_clip_node_finalize;
node_class->draw = gsk_rounded_clip_node_draw;
node_class->diff = gsk_rounded_clip_node_diff;
}
/**
* gsk_rounded_clip_node_new:
* @child: The node to draw
* @clip: The clip to apply
*
* Creates a `GskRenderNode` that will clip the @child to the area
* given by @clip.
*
* Returns: (transfer full) (type GskRoundedClipNode): A new `GskRenderNode`
*/
GskRenderNode *
gsk_rounded_clip_node_new (GskRenderNode *child,
const GskRoundedRect *clip)
{
GskRoundedClipNode *self;
GskRenderNode *node;
g_return_val_if_fail (GSK_IS_RENDER_NODE (child), NULL);
g_return_val_if_fail (clip != NULL, NULL);
self = gsk_render_node_alloc (GSK_ROUNDED_CLIP_NODE);
node = (GskRenderNode *) self;
node->offscreen_for_opacity = child->offscreen_for_opacity;
self->child = gsk_render_node_ref (child);
gsk_rounded_rect_init_copy (&self->clip, clip);
graphene_rect_intersection (&self->clip.bounds, &child->bounds, &node->bounds);
node->preferred_depth = gsk_render_node_get_preferred_depth (child);
return node;
}
/**
* gsk_rounded_clip_node_get_child:
* @node: (type GskRoundedClipNode): a rounded clip `GskRenderNode`
*
* Gets the child node that is getting clipped by the given @node.
*
* Returns: (transfer none): The child that is getting clipped
**/
GskRenderNode *
gsk_rounded_clip_node_get_child (const GskRenderNode *node)
{
const GskRoundedClipNode *self = (const GskRoundedClipNode *) node;
return self->child;
}
/**
* gsk_rounded_clip_node_get_clip:
* @node: (type GskRoundedClipNode): a rounded clip `GskRenderNode`
*
* Retrieves the rounded rectangle used to clip the contents of the @node.
*
* Returns: (transfer none): a rounded rectangle
*/
const GskRoundedRect *
gsk_rounded_clip_node_get_clip (const GskRenderNode *node)
{
const GskRoundedClipNode *self = (const GskRoundedClipNode *) node;
return &self->clip;
}
/* }}} */
/* {{{ GSK_FILL_NODE */
/**
* GskFillNode:
*
* A render node filling the area given by [struct@Gsk.Path]
* and [enum@Gsk.FillRule] with the child node.
*
* Since: 4.14
*/
struct _GskFillNode
{
GskRenderNode render_node;
GskRenderNode *child;
GskPath *path;
GskFillRule fill_rule;
};
static void
gsk_fill_node_finalize (GskRenderNode *node)
{
GskFillNode *self = (GskFillNode *) node;
GskRenderNodeClass *parent_class = g_type_class_peek (g_type_parent (GSK_TYPE_FILL_NODE));
gsk_render_node_unref (self->child);
gsk_path_unref (self->path);
parent_class->finalize (node);
}
static void
gsk_fill_node_draw (GskRenderNode *node,
cairo_t *cr)
{
GskFillNode *self = (GskFillNode *) node;
cairo_save (cr);
switch (self->fill_rule)
{
case GSK_FILL_RULE_WINDING:
cairo_set_fill_rule (cr, CAIRO_FILL_RULE_WINDING);
break;
case GSK_FILL_RULE_EVEN_ODD:
cairo_set_fill_rule (cr, CAIRO_FILL_RULE_EVEN_ODD);
break;
default:
g_assert_not_reached ();
break;
}
gsk_path_to_cairo (self->path, cr);
if (gsk_render_node_get_node_type (self->child) == GSK_COLOR_NODE &&
gsk_rect_contains_rect (&self->child->bounds, &node->bounds))
{
gdk_cairo_set_source_rgba (cr, gsk_color_node_get_color (self->child));
cairo_fill (cr);
}
else
{
cairo_clip (cr);
gsk_render_node_draw (self->child, cr);
}
cairo_restore (cr);
}
static void
gsk_fill_node_diff (GskRenderNode *node1,
GskRenderNode *node2,
cairo_region_t *region)
{
GskFillNode *self1 = (GskFillNode *) node1;
GskFillNode *self2 = (GskFillNode *) node2;
if (self1->path == self2->path)
{
cairo_region_t *sub;
cairo_rectangle_int_t clip_rect;
sub = cairo_region_create();
gsk_render_node_diff (self1->child, self2->child, sub);
rectangle_init_from_graphene (&clip_rect, &node1->bounds);
cairo_region_intersect_rectangle (sub, &clip_rect);
cairo_region_union (region, sub);
cairo_region_destroy (sub);
}
else
{
gsk_render_node_diff_impossible (node1, node2, region);
}
}
static void
gsk_fill_node_class_init (gpointer g_class,
gpointer class_data)
{
GskRenderNodeClass *node_class = g_class;
node_class->node_type = GSK_FILL_NODE;
node_class->finalize = gsk_fill_node_finalize;
node_class->draw = gsk_fill_node_draw;
node_class->diff = gsk_fill_node_diff;
}
/**
* gsk_fill_node_new:
* @child: The node to fill the area with
* @path: The path describing the area to fill
* @fill_rule: The fill rule to use
*
* Creates a `GskRenderNode` that will fill the @child in the area
* given by @path and @fill_rule.
*
* Returns: (transfer none) (type GskFillNode): A new `GskRenderNode`
*
* Since: 4.14
*/
GskRenderNode *
gsk_fill_node_new (GskRenderNode *child,
GskPath *path,
GskFillRule fill_rule)
{
GskFillNode *self;
GskRenderNode *node;
graphene_rect_t path_bounds;
g_return_val_if_fail (GSK_IS_RENDER_NODE (child), NULL);
g_return_val_if_fail (path != NULL, NULL);
self = gsk_render_node_alloc (GSK_FILL_NODE);
node = (GskRenderNode *) self;
self->child = gsk_render_node_ref (child);
self->path = gsk_path_ref (path);
self->fill_rule = fill_rule;
if (gsk_path_get_bounds (path, &path_bounds))
graphene_rect_intersection (&path_bounds, &child->bounds, &node->bounds);
else
graphene_rect_init_from_rect (&node->bounds, graphene_rect_zero ());
return node;
}
/**
* gsk_fill_node_get_child:
* @node: (type GskFillNode): a fill `GskRenderNode`
*
* Gets the child node that is getting drawn by the given @node.
*
* Returns: (transfer none): The child that is getting drawn
*
* Since: 4.14
*/
GskRenderNode *
gsk_fill_node_get_child (const GskRenderNode *node)
{
const GskFillNode *self = (const GskFillNode *) node;
g_return_val_if_fail (GSK_IS_RENDER_NODE_TYPE (node, GSK_FILL_NODE), NULL);
return self->child;
}
/**
* gsk_fill_node_get_path:
* @node: (type GskFillNode): a fill `GskRenderNode`
*
* Retrieves the path used to describe the area filled with the contents of
* the @node.
*
* Returns: (transfer none): a `GskPath`
*
* Since: 4.14
*/
GskPath *
gsk_fill_node_get_path (const GskRenderNode *node)
{
const GskFillNode *self = (const GskFillNode *) node;
g_return_val_if_fail (GSK_IS_RENDER_NODE_TYPE (node, GSK_FILL_NODE), NULL);
return self->path;
}
/**
* gsk_fill_node_get_fill_rule:
* @node: (type GskFillNode): a fill `GskRenderNode`
*
* Retrieves the fill rule used to determine how the path is filled.
*
* Returns: a `GskFillRule`
*
* Since: 4.14
*/
GskFillRule
gsk_fill_node_get_fill_rule (const GskRenderNode *node)
{
const GskFillNode *self = (const GskFillNode *) node;
g_return_val_if_fail (GSK_IS_RENDER_NODE_TYPE (node, GSK_FILL_NODE), GSK_FILL_RULE_WINDING);
return self->fill_rule;
}
/* }}} */
/* {{{ GSK_STROKE_NODE */
/**
* GskStrokeNode:
*
* A render node that will fill the area determined by stroking the the given
* [struct@Gsk.Path] using the [struct@Gsk.Stroke] attributes.
*
* Since: 4.14
*/
struct _GskStrokeNode
{
GskRenderNode render_node;
GskRenderNode *child;
GskPath *path;
GskStroke stroke;
};
static void
gsk_stroke_node_finalize (GskRenderNode *node)
{
GskStrokeNode *self = (GskStrokeNode *) node;
GskRenderNodeClass *parent_class = g_type_class_peek (g_type_parent (GSK_TYPE_STROKE_NODE));
gsk_render_node_unref (self->child);
gsk_path_unref (self->path);
gsk_stroke_clear (&self->stroke);
parent_class->finalize (node);
}
static void
gsk_stroke_node_draw (GskRenderNode *node,
cairo_t *cr)
{
GskStrokeNode *self = (GskStrokeNode *) node;
cairo_save (cr);
if (gsk_render_node_get_node_type (self->child) == GSK_COLOR_NODE &&
gsk_rect_contains_rect (&self->child->bounds, &node->bounds))
{
gdk_cairo_set_source_rgba (cr, gsk_color_node_get_color (self->child));
}
else
{
gsk_cairo_rectangle (cr, &self->child->bounds);
cairo_clip (cr);
cairo_push_group (cr);
gsk_render_node_draw (self->child, cr);
cairo_pop_group_to_source (cr);
}
gsk_stroke_to_cairo (&self->stroke, cr);
gsk_path_to_cairo (self->path, cr);
cairo_stroke (cr);
cairo_restore (cr);
}
static void
gsk_stroke_node_diff (GskRenderNode *node1,
GskRenderNode *node2,
cairo_region_t *region)
{
GskStrokeNode *self1 = (GskStrokeNode *) node1;
GskStrokeNode *self2 = (GskStrokeNode *) node2;
if (self1->path == self2->path &&
gsk_stroke_equal (&self1->stroke, &self2->stroke))
{
cairo_region_t *sub;
cairo_rectangle_int_t clip_rect;
sub = cairo_region_create();
gsk_render_node_diff (self1->child, self2->child, sub);
rectangle_init_from_graphene (&clip_rect, &node1->bounds);
cairo_region_intersect_rectangle (sub, &clip_rect);
cairo_region_union (region, sub);
cairo_region_destroy (sub);
}
else
{
gsk_render_node_diff_impossible (node1, node2, region);
}
}
static void
gsk_stroke_node_class_init (gpointer g_class,
gpointer class_data)
{
GskRenderNodeClass *node_class = g_class;
node_class->node_type = GSK_STROKE_NODE;
node_class->finalize = gsk_stroke_node_finalize;
node_class->draw = gsk_stroke_node_draw;
node_class->diff = gsk_stroke_node_diff;
}
/**
* gsk_stroke_node_new:
* @child: The node to stroke the area with
* @path: (transfer none): The path describing the area to stroke
* @stroke: (transfer none): The stroke attributes to use
*
* Creates a #GskRenderNode that will fill the outline generated by stroking
* the given @path using the attributes defined in @stroke.
*
* The area is filled with @child.
*
* Returns: (transfer none) (type GskStrokeNode): A new #GskRenderNode
*
* Since: 4.14
*/
GskRenderNode *
gsk_stroke_node_new (GskRenderNode *child,
GskPath *path,
const GskStroke *stroke)
{
GskStrokeNode *self;
GskRenderNode *node;
graphene_rect_t stroke_bounds;
g_return_val_if_fail (GSK_IS_RENDER_NODE (child), NULL);
g_return_val_if_fail (path != NULL, NULL);
g_return_val_if_fail (stroke != NULL, NULL);
self = gsk_render_node_alloc (GSK_STROKE_NODE);
node = (GskRenderNode *) self;
self->child = gsk_render_node_ref (child);
self->path = gsk_path_ref (path);
gsk_stroke_init_copy (&self->stroke, stroke);
if (gsk_path_get_stroke_bounds (self->path, &self->stroke, &stroke_bounds))
graphene_rect_intersection (&stroke_bounds, &child->bounds, &node->bounds);
else
graphene_rect_init_from_rect (&node->bounds, graphene_rect_zero ());
return node;
}
/**
* gsk_stroke_node_get_child:
* @node: (type GskStrokeNode): a stroke #GskRenderNode
*
* Gets the child node that is getting drawn by the given @node.
*
* Returns: (transfer none): The child that is getting drawn
*
* Since: 4.14
*/
GskRenderNode *
gsk_stroke_node_get_child (const GskRenderNode *node)
{
const GskStrokeNode *self = (const GskStrokeNode *) node;
g_return_val_if_fail (GSK_IS_RENDER_NODE_TYPE (node, GSK_STROKE_NODE), NULL);
return self->child;
}
/**
* gsk_stroke_node_get_path:
* @node: (type GskStrokeNode): a stroke #GskRenderNode
*
* Retrieves the path that will be stroked with the contents of
* the @node.
*
* Returns: (transfer none): a #GskPath
*
* Since: 4.14
*/
GskPath *
gsk_stroke_node_get_path (const GskRenderNode *node)
{
const GskStrokeNode *self = (const GskStrokeNode *) node;
g_return_val_if_fail (GSK_IS_RENDER_NODE_TYPE (node, GSK_STROKE_NODE), NULL);
return self->path;
}
/**
* gsk_stroke_node_get_stroke:
* @node: (type GskStrokeNode): a stroke #GskRenderNode
*
* Retrieves the stroke attributes used in this @node.
*
* Returns: a #GskStroke
*
* Since: 4.14
*/
const GskStroke *
gsk_stroke_node_get_stroke (const GskRenderNode *node)
{
const GskStrokeNode *self = (const GskStrokeNode *) node;
g_return_val_if_fail (GSK_IS_RENDER_NODE_TYPE (node, GSK_STROKE_NODE), NULL);
return &self->stroke;
}
/* }}} */
/* {{{ GSK_SHADOW_NODE */
/**
* GskShadowNode:
*
* A render node drawing one or more shadows behind its single child node.
*/
struct _GskShadowNode
{
GskRenderNode render_node;
GskRenderNode *child;
gsize n_shadows;
GskShadow *shadows;
};
static void
gsk_shadow_node_finalize (GskRenderNode *node)
{
GskShadowNode *self = (GskShadowNode *) node;
GskRenderNodeClass *parent_class = g_type_class_peek (g_type_parent (GSK_TYPE_SHADOW_NODE));
gsk_render_node_unref (self->child);
g_free (self->shadows);
parent_class->finalize (node);
}
static void
gsk_shadow_node_draw (GskRenderNode *node,
cairo_t *cr)
{
GskShadowNode *self = (GskShadowNode *) node;
gsize i;
cairo_save (cr);
/* clip so the blur area stays small */
gsk_cairo_rectangle (cr, &node->bounds);
cairo_clip (cr);
for (i = 0; i < self->n_shadows; i++)
{
GskShadow *shadow = &self->shadows[i];
cairo_pattern_t *pattern;
/* We don't need to draw invisible shadows */
if (gdk_rgba_is_clear (&shadow->color))
continue;
cairo_save (cr);
cr = gsk_cairo_blur_start_drawing (cr, shadow->radius, GSK_BLUR_X | GSK_BLUR_Y);
cairo_save (cr);
cairo_translate (cr, shadow->dx, shadow->dy);
cairo_push_group (cr);
gsk_render_node_draw (self->child, cr);
pattern = cairo_pop_group (cr);
gdk_cairo_set_source_rgba (cr, &shadow->color);
cairo_mask (cr, pattern);
cairo_restore (cr);
cr = gsk_cairo_blur_finish_drawing (cr, shadow->radius, &shadow->color, GSK_BLUR_X | GSK_BLUR_Y);
cairo_restore (cr);
}
gsk_render_node_draw (self->child, cr);
cairo_restore (cr);
}
static void
gsk_shadow_node_diff (GskRenderNode *node1,
GskRenderNode *node2,
cairo_region_t *region)
{
GskShadowNode *self1 = (GskShadowNode *) node1;
GskShadowNode *self2 = (GskShadowNode *) node2;
int top = 0, right = 0, bottom = 0, left = 0;
cairo_region_t *sub;
cairo_rectangle_int_t rect;
gsize i, n;
if (self1->n_shadows != self2->n_shadows)
{
gsk_render_node_diff_impossible (node1, node2, region);
return;
}
for (i = 0; i < self1->n_shadows; i++)
{
GskShadow *shadow1 = &self1->shadows[i];
GskShadow *shadow2 = &self2->shadows[i];
float clip_radius;
if (!gdk_rgba_equal (&shadow1->color, &shadow2->color) ||
shadow1->dx != shadow2->dx ||
shadow1->dy != shadow2->dy ||
shadow1->radius != shadow2->radius)
{
gsk_render_node_diff_impossible (node1, node2, region);
return;
}
clip_radius = gsk_cairo_blur_compute_pixels (shadow1->radius / 2.0);
top = MAX (top, ceil (clip_radius - shadow1->dy));
right = MAX (right, ceil (clip_radius + shadow1->dx));
bottom = MAX (bottom, ceil (clip_radius + shadow1->dy));
left = MAX (left, ceil (clip_radius - shadow1->dx));
}
sub = cairo_region_create ();
gsk_render_node_diff (self1->child, self2->child, sub);
n = cairo_region_num_rectangles (sub);
for (i = 0; i < n; i++)
{
cairo_region_get_rectangle (sub, i, &rect);
rect.x -= left;
rect.y -= top;
rect.width += left + right;
rect.height += top + bottom;
cairo_region_union_rectangle (region, &rect);
}
cairo_region_destroy (sub);
}
static void
gsk_shadow_node_get_bounds (GskShadowNode *self,
graphene_rect_t *bounds)
{
float top = 0, right = 0, bottom = 0, left = 0;
gsize i;
graphene_rect_init_from_rect (bounds, &self->child->bounds);
for (i = 0; i < self->n_shadows; i++)
{
float clip_radius = gsk_cairo_blur_compute_pixels (self->shadows[i].radius / 2.0);
top = MAX (top, clip_radius - self->shadows[i].dy);
right = MAX (right, clip_radius + self->shadows[i].dx);
bottom = MAX (bottom, clip_radius + self->shadows[i].dy);
left = MAX (left, clip_radius - self->shadows[i].dx);
}
bounds->origin.x -= left;
bounds->origin.y -= top;
bounds->size.width += left + right;
bounds->size.height += top + bottom;
}
static void
gsk_shadow_node_class_init (gpointer g_class,
gpointer class_data)
{
GskRenderNodeClass *node_class = g_class;
node_class->node_type = GSK_SHADOW_NODE;
node_class->finalize = gsk_shadow_node_finalize;
node_class->draw = gsk_shadow_node_draw;
node_class->diff = gsk_shadow_node_diff;
}
/**
* gsk_shadow_node_new:
* @child: The node to draw
* @shadows: (array length=n_shadows): The shadows to apply
* @n_shadows: number of entries in the @shadows array
*
* Creates a `GskRenderNode` that will draw a @child with the given
* @shadows below it.
*
* Returns: (transfer full) (type GskShadowNode): A new `GskRenderNode`
*/
GskRenderNode *
gsk_shadow_node_new (GskRenderNode *child,
const GskShadow *shadows,
gsize n_shadows)
{
GskShadowNode *self;
GskRenderNode *node;
g_return_val_if_fail (GSK_IS_RENDER_NODE (child), NULL);
g_return_val_if_fail (shadows != NULL, NULL);
g_return_val_if_fail (n_shadows > 0, NULL);
self = gsk_render_node_alloc (GSK_SHADOW_NODE);
node = (GskRenderNode *) self;
node->offscreen_for_opacity = TRUE;
self->child = gsk_render_node_ref (child);
self->n_shadows = n_shadows;
self->shadows = g_malloc_n (n_shadows, sizeof (GskShadow));
memcpy (self->shadows, shadows, n_shadows * sizeof (GskShadow));
gsk_shadow_node_get_bounds (self, &node->bounds);
node->preferred_depth = gsk_render_node_get_preferred_depth (child);
return node;
}
/**
* gsk_shadow_node_get_child:
* @node: (type GskShadowNode): a shadow `GskRenderNode`
*
* Retrieves the child `GskRenderNode` of the shadow @node.
*
* Returns: (transfer none): the child render node
*/
GskRenderNode *
gsk_shadow_node_get_child (const GskRenderNode *node)
{
const GskShadowNode *self = (const GskShadowNode *) node;
return self->child;
}
/**
* gsk_shadow_node_get_shadow:
* @node: (type GskShadowNode): a shadow `GskRenderNode`
* @i: the given index
*
* Retrieves the shadow data at the given index @i.
*
* Returns: (transfer none): the shadow data
*/
const GskShadow *
gsk_shadow_node_get_shadow (const GskRenderNode *node,
gsize i)
{
const GskShadowNode *self = (const GskShadowNode *) node;
return &self->shadows[i];
}
/**
* gsk_shadow_node_get_n_shadows:
* @node: (type GskShadowNode): a shadow `GskRenderNode`
*
* Retrieves the number of shadows in the @node.
*
* Returns: the number of shadows.
*/
gsize
gsk_shadow_node_get_n_shadows (const GskRenderNode *node)
{
const GskShadowNode *self = (const GskShadowNode *) node;
return self->n_shadows;
}
/* }}} */
/* {{{ GSK_BLEND_NODE */
/**
* GskBlendNode:
*
* A render node applying a blending function between its two child nodes.
*/
struct _GskBlendNode
{
GskRenderNode render_node;
GskRenderNode *bottom;
GskRenderNode *top;
GskBlendMode blend_mode;
};
static cairo_operator_t
gsk_blend_mode_to_cairo_operator (GskBlendMode blend_mode)
{
switch (blend_mode)
{
default:
g_assert_not_reached ();
case GSK_BLEND_MODE_DEFAULT:
return CAIRO_OPERATOR_OVER;
case GSK_BLEND_MODE_MULTIPLY:
return CAIRO_OPERATOR_MULTIPLY;
case GSK_BLEND_MODE_SCREEN:
return CAIRO_OPERATOR_SCREEN;
case GSK_BLEND_MODE_OVERLAY:
return CAIRO_OPERATOR_OVERLAY;
case GSK_BLEND_MODE_DARKEN:
return CAIRO_OPERATOR_DARKEN;
case GSK_BLEND_MODE_LIGHTEN:
return CAIRO_OPERATOR_LIGHTEN;
case GSK_BLEND_MODE_COLOR_DODGE:
return CAIRO_OPERATOR_COLOR_DODGE;
case GSK_BLEND_MODE_COLOR_BURN:
return CAIRO_OPERATOR_COLOR_BURN;
case GSK_BLEND_MODE_HARD_LIGHT:
return CAIRO_OPERATOR_HARD_LIGHT;
case GSK_BLEND_MODE_SOFT_LIGHT:
return CAIRO_OPERATOR_SOFT_LIGHT;
case GSK_BLEND_MODE_DIFFERENCE:
return CAIRO_OPERATOR_DIFFERENCE;
case GSK_BLEND_MODE_EXCLUSION:
return CAIRO_OPERATOR_EXCLUSION;
case GSK_BLEND_MODE_COLOR:
return CAIRO_OPERATOR_HSL_COLOR;
case GSK_BLEND_MODE_HUE:
return CAIRO_OPERATOR_HSL_HUE;
case GSK_BLEND_MODE_SATURATION:
return CAIRO_OPERATOR_HSL_SATURATION;
case GSK_BLEND_MODE_LUMINOSITY:
return CAIRO_OPERATOR_HSL_LUMINOSITY;
}
}
static void
gsk_blend_node_finalize (GskRenderNode *node)
{
GskBlendNode *self = (GskBlendNode *) node;
GskRenderNodeClass *parent_class = g_type_class_peek (g_type_parent (GSK_TYPE_BLEND_NODE));
gsk_render_node_unref (self->bottom);
gsk_render_node_unref (self->top);
parent_class->finalize (node);
}
static void
gsk_blend_node_draw (GskRenderNode *node,
cairo_t *cr)
{
GskBlendNode *self = (GskBlendNode *) node;
cairo_push_group (cr);
gsk_render_node_draw (self->bottom, cr);
cairo_push_group (cr);
gsk_render_node_draw (self->top, cr);
cairo_pop_group_to_source (cr);
cairo_set_operator (cr, gsk_blend_mode_to_cairo_operator (self->blend_mode));
cairo_paint (cr);
cairo_pop_group_to_source (cr); /* resets operator */
cairo_paint (cr);
}
static void
gsk_blend_node_diff (GskRenderNode *node1,
GskRenderNode *node2,
cairo_region_t *region)
{
GskBlendNode *self1 = (GskBlendNode *) node1;
GskBlendNode *self2 = (GskBlendNode *) node2;
if (self1->blend_mode == self2->blend_mode)
{
gsk_render_node_diff (self1->top, self2->top, region);
gsk_render_node_diff (self1->bottom, self2->bottom, region);
}
else
{
gsk_render_node_diff_impossible (node1, node2, region);
}
}
static void
gsk_blend_node_class_init (gpointer g_class,
gpointer class_data)
{
GskRenderNodeClass *node_class = g_class;
node_class->node_type = GSK_BLEND_NODE;
node_class->finalize = gsk_blend_node_finalize;
node_class->draw = gsk_blend_node_draw;
node_class->diff = gsk_blend_node_diff;
}
/**
* gsk_blend_node_new:
* @bottom: The bottom node to be drawn
* @top: The node to be blended onto the @bottom node
* @blend_mode: The blend mode to use
*
* Creates a `GskRenderNode` that will use @blend_mode to blend the @top
* node onto the @bottom node.
*
* Returns: (transfer full) (type GskBlendNode): A new `GskRenderNode`
*/
GskRenderNode *
gsk_blend_node_new (GskRenderNode *bottom,
GskRenderNode *top,
GskBlendMode blend_mode)
{
GskBlendNode *self;
GskRenderNode *node;
g_return_val_if_fail (GSK_IS_RENDER_NODE (bottom), NULL);
g_return_val_if_fail (GSK_IS_RENDER_NODE (top), NULL);
self = gsk_render_node_alloc (GSK_BLEND_NODE);
node = (GskRenderNode *) self;
node->offscreen_for_opacity = TRUE;
self->bottom = gsk_render_node_ref (bottom);
self->top = gsk_render_node_ref (top);
self->blend_mode = blend_mode;
graphene_rect_union (&bottom->bounds, &top->bounds, &node->bounds);
node->preferred_depth = gdk_memory_depth_merge (gsk_render_node_get_preferred_depth (bottom),
gsk_render_node_get_preferred_depth (top));
return node;
}
/**
* gsk_blend_node_get_bottom_child:
* @node: (type GskBlendNode): a blending `GskRenderNode`
*
* Retrieves the bottom `GskRenderNode` child of the @node.
*
* Returns: (transfer none): the bottom child node
*/
GskRenderNode *
gsk_blend_node_get_bottom_child (const GskRenderNode *node)
{
const GskBlendNode *self = (const GskBlendNode *) node;
return self->bottom;
}
/**
* gsk_blend_node_get_top_child:
* @node: (type GskBlendNode): a blending `GskRenderNode`
*
* Retrieves the top `GskRenderNode` child of the @node.
*
* Returns: (transfer none): the top child node
*/
GskRenderNode *
gsk_blend_node_get_top_child (const GskRenderNode *node)
{
const GskBlendNode *self = (const GskBlendNode *) node;
return self->top;
}
/**
* gsk_blend_node_get_blend_mode:
* @node: (type GskBlendNode): a blending `GskRenderNode`
*
* Retrieves the blend mode used by @node.
*
* Returns: the blend mode
*/
GskBlendMode
gsk_blend_node_get_blend_mode (const GskRenderNode *node)
{
const GskBlendNode *self = (const GskBlendNode *) node;
return self->blend_mode;
}
/* }}} */
/* {{{ GSK_CROSS_FADE_NODE */
/**
* GskCrossFadeNode:
*
* A render node cross fading between two child nodes.
*/
struct _GskCrossFadeNode
{
GskRenderNode render_node;
GskRenderNode *start;
GskRenderNode *end;
float progress;
};
static void
gsk_cross_fade_node_finalize (GskRenderNode *node)
{
GskCrossFadeNode *self = (GskCrossFadeNode *) node;
GskRenderNodeClass *parent_class = g_type_class_peek (g_type_parent (GSK_TYPE_CROSS_FADE_NODE));
gsk_render_node_unref (self->start);
gsk_render_node_unref (self->end);
parent_class->finalize (node);
}
static void
gsk_cross_fade_node_draw (GskRenderNode *node,
cairo_t *cr)
{
GskCrossFadeNode *self = (GskCrossFadeNode *) node;
cairo_push_group_with_content (cr, CAIRO_CONTENT_COLOR_ALPHA);
gsk_render_node_draw (self->start, cr);
cairo_push_group_with_content (cr, CAIRO_CONTENT_COLOR_ALPHA);
gsk_render_node_draw (self->end, cr);
cairo_pop_group_to_source (cr);
cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE);
cairo_paint_with_alpha (cr, self->progress);
cairo_pop_group_to_source (cr); /* resets operator */
cairo_paint (cr);
}
static void
gsk_cross_fade_node_diff (GskRenderNode *node1,
GskRenderNode *node2,
cairo_region_t *region)
{
GskCrossFadeNode *self1 = (GskCrossFadeNode *) node1;
GskCrossFadeNode *self2 = (GskCrossFadeNode *) node2;
if (self1->progress == self2->progress)
{
gsk_render_node_diff (self1->start, self2->start, region);
gsk_render_node_diff (self1->end, self2->end, region);
return;
}
gsk_render_node_diff_impossible (node1, node2, region);
}
static void
gsk_cross_fade_node_class_init (gpointer g_class,
gpointer class_data)
{
GskRenderNodeClass *node_class = g_class;
node_class->node_type = GSK_CROSS_FADE_NODE;
node_class->finalize = gsk_cross_fade_node_finalize;
node_class->draw = gsk_cross_fade_node_draw;
node_class->diff = gsk_cross_fade_node_diff;
}
/**
* gsk_cross_fade_node_new:
* @start: The start node to be drawn
* @end: The node to be cross_fadeed onto the @start node
* @progress: How far the fade has progressed from start to end. The value will
* be clamped to the range [0 ... 1]
*
* Creates a `GskRenderNode` that will do a cross-fade between @start and @end.
*
* Returns: (transfer full) (type GskCrossFadeNode): A new `GskRenderNode`
*/
GskRenderNode *
gsk_cross_fade_node_new (GskRenderNode *start,
GskRenderNode *end,
float progress)
{
GskCrossFadeNode *self;
GskRenderNode *node;
g_return_val_if_fail (GSK_IS_RENDER_NODE (start), NULL);
g_return_val_if_fail (GSK_IS_RENDER_NODE (end), NULL);
self = gsk_render_node_alloc (GSK_CROSS_FADE_NODE);
node = (GskRenderNode *) self;
node->offscreen_for_opacity = TRUE;
self->start = gsk_render_node_ref (start);
self->end = gsk_render_node_ref (end);
self->progress = CLAMP (progress, 0.0, 1.0);
graphene_rect_union (&start->bounds, &end->bounds, &node->bounds);
node->preferred_depth = gdk_memory_depth_merge (gsk_render_node_get_preferred_depth (start),
gsk_render_node_get_preferred_depth (end));
return node;
}
/**
* gsk_cross_fade_node_get_start_child:
* @node: (type GskCrossFadeNode): a cross-fading `GskRenderNode`
*
* Retrieves the child `GskRenderNode` at the beginning of the cross-fade.
*
* Returns: (transfer none): a `GskRenderNode`
*/
GskRenderNode *
gsk_cross_fade_node_get_start_child (const GskRenderNode *node)
{
const GskCrossFadeNode *self = (const GskCrossFadeNode *) node;
return self->start;
}
/**
* gsk_cross_fade_node_get_end_child:
* @node: (type GskCrossFadeNode): a cross-fading `GskRenderNode`
*
* Retrieves the child `GskRenderNode` at the end of the cross-fade.
*
* Returns: (transfer none): a `GskRenderNode`
*/
GskRenderNode *
gsk_cross_fade_node_get_end_child (const GskRenderNode *node)
{
const GskCrossFadeNode *self = (const GskCrossFadeNode *) node;
return self->end;
}
/**
* gsk_cross_fade_node_get_progress:
* @node: (type GskCrossFadeNode): a cross-fading `GskRenderNode`
*
* Retrieves the progress value of the cross fade.
*
* Returns: the progress value, between 0 and 1
*/
float
gsk_cross_fade_node_get_progress (const GskRenderNode *node)
{
const GskCrossFadeNode *self = (const GskCrossFadeNode *) node;
return self->progress;
}
/* }}} */
/* {{{ GSK_TEXT_NODE */
/**
* GskTextNode:
*
* A render node drawing a set of glyphs.
*/
struct _GskTextNode
{
GskRenderNode render_node;
PangoFont *font;
gboolean has_color_glyphs;
GdkRGBA color;
graphene_point_t offset;
guint num_glyphs;
PangoGlyphInfo *glyphs;
};
static void
gsk_text_node_finalize (GskRenderNode *node)
{
GskTextNode *self = (GskTextNode *) node;
GskRenderNodeClass *parent_class = g_type_class_peek (g_type_parent (GSK_TYPE_TEXT_NODE));
g_object_unref (self->font);
g_free (self->glyphs);
parent_class->finalize (node);
}
static void
gsk_text_node_draw (GskRenderNode *node,
cairo_t *cr)
{
GskTextNode *self = (GskTextNode *) node;
PangoGlyphString glyphs;
glyphs.num_glyphs = self->num_glyphs;
glyphs.glyphs = self->glyphs;
glyphs.log_clusters = NULL;
cairo_save (cr);
gdk_cairo_set_source_rgba (cr, &self->color);
cairo_translate (cr, self->offset.x, self->offset.y);
pango_cairo_show_glyph_string (cr, self->font, &glyphs);
cairo_restore (cr);
}
static void
gsk_text_node_diff (GskRenderNode *node1,
GskRenderNode *node2,
cairo_region_t *region)
{
GskTextNode *self1 = (GskTextNode *) node1;
GskTextNode *self2 = (GskTextNode *) node2;
if (self1->font == self2->font &&
gdk_rgba_equal (&self1->color, &self2->color) &&
graphene_point_equal (&self1->offset, &self2->offset) &&
self1->num_glyphs == self2->num_glyphs)
{
guint i;
for (i = 0; i < self1->num_glyphs; i++)
{
PangoGlyphInfo *info1 = &self1->glyphs[i];
PangoGlyphInfo *info2 = &self2->glyphs[i];
if (info1->glyph == info2->glyph &&
info1->geometry.width == info2->geometry.width &&
info1->geometry.x_offset == info2->geometry.x_offset &&
info1->geometry.y_offset == info2->geometry.y_offset &&
info1->attr.is_cluster_start == info2->attr.is_cluster_start &&
info1->attr.is_color == info2->attr.is_color)
continue;
gsk_render_node_diff_impossible (node1, node2, region);
return;
}
return;
}
gsk_render_node_diff_impossible (node1, node2, region);
}
static void
gsk_text_node_class_init (gpointer g_class,
gpointer class_data)
{
GskRenderNodeClass *node_class = g_class;
node_class->node_type = GSK_TEXT_NODE;
node_class->finalize = gsk_text_node_finalize;
node_class->draw = gsk_text_node_draw;
node_class->diff = gsk_text_node_diff;
}
/**
* gsk_text_node_new:
* @font: the `PangoFont` containing the glyphs
* @glyphs: the `PangoGlyphString` to render
* @color: the foreground color to render with
* @offset: offset of the baseline
*
* Creates a render node that renders the given glyphs.
*
* Note that @color may not be used if the font contains
* color glyphs.
*
* Returns: (nullable) (transfer full) (type GskTextNode): a new `GskRenderNode`
*/
GskRenderNode *
gsk_text_node_new (PangoFont *font,
PangoGlyphString *glyphs,
const GdkRGBA *color,
const graphene_point_t *offset)
{
GskTextNode *self;
GskRenderNode *node;
PangoRectangle ink_rect;
PangoGlyphInfo *glyph_infos;
int n;
pango_glyph_string_extents (glyphs, font, &ink_rect, NULL);
pango_extents_to_pixels (&ink_rect, NULL);
/* Don't create nodes with empty bounds */
if (ink_rect.width == 0 || ink_rect.height == 0)
return NULL;
self = gsk_render_node_alloc (GSK_TEXT_NODE);
node = (GskRenderNode *) self;
node->offscreen_for_opacity = FALSE;
self->font = g_object_ref (font);
self->color = *color;
self->offset = *offset;
self->has_color_glyphs = FALSE;
glyph_infos = g_malloc_n (glyphs->num_glyphs, sizeof (PangoGlyphInfo));
n = 0;
for (int i = 0; i < glyphs->num_glyphs; i++)
{
/* skip empty glyphs */
if (glyphs->glyphs[i].glyph == PANGO_GLYPH_EMPTY)
continue;
glyph_infos[n] = glyphs->glyphs[i];
if (glyphs->glyphs[i].attr.is_color)
self->has_color_glyphs = TRUE;
n++;
}
self->glyphs = glyph_infos;
self->num_glyphs = n;
graphene_rect_init (&node->bounds,
offset->x + ink_rect.x - 1,
offset->y + ink_rect.y - 1,
ink_rect.width + 2,
ink_rect.height + 2);
return node;
}
/**
* gsk_text_node_get_color:
* @node: (type GskTextNode): a text `GskRenderNode`
*
* Retrieves the color used by the text @node.
*
* Returns: (transfer none): the text color
*/
const GdkRGBA *
gsk_text_node_get_color (const GskRenderNode *node)
{
const GskTextNode *self = (const GskTextNode *) node;
return &self->color;
}
/**
* gsk_text_node_get_font:
* @node: (type GskTextNode): The `GskRenderNode`
*
* Returns the font used by the text @node.
*
* Returns: (transfer none): the font
*/
PangoFont *
gsk_text_node_get_font (const GskRenderNode *node)
{
const GskTextNode *self = (const GskTextNode *) node;
return self->font;
}
/**
* gsk_text_node_has_color_glyphs:
* @node: (type GskTextNode): a text `GskRenderNode`
*
* Checks whether the text @node has color glyphs.
*
* Returns: %TRUE if the text node has color glyphs
*
* Since: 4.2
*/
gboolean
gsk_text_node_has_color_glyphs (const GskRenderNode *node)
{
const GskTextNode *self = (const GskTextNode *) node;
return self->has_color_glyphs;
}
/**
* gsk_text_node_get_num_glyphs:
* @node: (type GskTextNode): a text `GskRenderNode`
*
* Retrieves the number of glyphs in the text node.
*
* Returns: the number of glyphs
*/
guint
gsk_text_node_get_num_glyphs (const GskRenderNode *node)
{
const GskTextNode *self = (const GskTextNode *) node;
return self->num_glyphs;
}
/**
* gsk_text_node_get_glyphs:
* @node: (type GskTextNode): a text `GskRenderNode`
* @n_glyphs: (out) (optional): the number of glyphs returned
*
* Retrieves the glyph information in the @node.
*
* Returns: (transfer none) (array length=n_glyphs): the glyph information
*/
const PangoGlyphInfo *
gsk_text_node_get_glyphs (const GskRenderNode *node,
guint *n_glyphs)
{
const GskTextNode *self = (const GskTextNode *) node;
if (n_glyphs != NULL)
*n_glyphs = self->num_glyphs;
return self->glyphs;
}
/**
* gsk_text_node_get_offset:
* @node: (type GskTextNode): a text `GskRenderNode`
*
* Retrieves the offset applied to the text.
*
* Returns: (transfer none): a point with the horizontal and vertical offsets
*/
const graphene_point_t *
gsk_text_node_get_offset (const GskRenderNode *node)
{
const GskTextNode *self = (const GskTextNode *) node;
return &self->offset;
}
/* }}} */
/* {{{ GSK_BLUR_NODE */
/**
* GskBlurNode:
*
* A render node applying a blur effect to its single child.
*/
struct _GskBlurNode
{
GskRenderNode render_node;
GskRenderNode *child;
float radius;
};
static void
gsk_blur_node_finalize (GskRenderNode *node)
{
GskBlurNode *self = (GskBlurNode *) node;
GskRenderNodeClass *parent_class = g_type_class_peek (g_type_parent (GSK_TYPE_BLUR_NODE));
gsk_render_node_unref (self->child);
parent_class->finalize (node);
}
static void
blur_once (cairo_surface_t *src,
cairo_surface_t *dest,
int radius,
guchar *div_kernel_size)
{
int width, height, src_rowstride, dest_rowstride, n_channels;
guchar *p_src, *p_dest, *c1, *c2;
int x, y, i, i1, i2, width_minus_1, height_minus_1, radius_plus_1;
int r, g, b, a;
guchar *p_dest_row, *p_dest_col;
width = cairo_image_surface_get_width (src);
height = cairo_image_surface_get_height (src);
n_channels = 4;
radius_plus_1 = radius + 1;
/* horizontal blur */
p_src = cairo_image_surface_get_data (src);
p_dest = cairo_image_surface_get_data (dest);
src_rowstride = cairo_image_surface_get_stride (src);
dest_rowstride = cairo_image_surface_get_stride (dest);
width_minus_1 = width - 1;
for (y = 0; y < height; y++)
{
/* calc the initial sums of the kernel */
r = g = b = a = 0;
for (i = -radius; i <= radius; i++)
{
c1 = p_src + (CLAMP (i, 0, width_minus_1) * n_channels);
r += c1[0];
g += c1[1];
b += c1[2];
a += c1[3];
}
p_dest_row = p_dest;
for (x = 0; x < width; x++)
{
/* set as the mean of the kernel */
p_dest_row[0] = div_kernel_size[r];
p_dest_row[1] = div_kernel_size[g];
p_dest_row[2] = div_kernel_size[b];
p_dest_row[3] = div_kernel_size[a];
p_dest_row += n_channels;
/* the pixel to add to the kernel */
i1 = x + radius_plus_1;
if (i1 > width_minus_1)
i1 = width_minus_1;
c1 = p_src + (i1 * n_channels);
/* the pixel to remove from the kernel */
i2 = x - radius;
if (i2 < 0)
i2 = 0;
c2 = p_src + (i2 * n_channels);
/* calc the new sums of the kernel */
r += c1[0] - c2[0];
g += c1[1] - c2[1];
b += c1[2] - c2[2];
a += c1[3] - c2[3];
}
p_src += src_rowstride;
p_dest += dest_rowstride;
}
/* vertical blur */
p_src = cairo_image_surface_get_data (dest);
p_dest = cairo_image_surface_get_data (src);
src_rowstride = cairo_image_surface_get_stride (dest);
dest_rowstride = cairo_image_surface_get_stride (src);
height_minus_1 = height - 1;
for (x = 0; x < width; x++)
{
/* calc the initial sums of the kernel */
r = g = b = a = 0;
for (i = -radius; i <= radius; i++)
{
c1 = p_src + (CLAMP (i, 0, height_minus_1) * src_rowstride);
r += c1[0];
g += c1[1];
b += c1[2];
a += c1[3];
}
p_dest_col = p_dest;
for (y = 0; y < height; y++)
{
/* set as the mean of the kernel */
p_dest_col[0] = div_kernel_size[r];
p_dest_col[1] = div_kernel_size[g];
p_dest_col[2] = div_kernel_size[b];
p_dest_col[3] = div_kernel_size[a];
p_dest_col += dest_rowstride;
/* the pixel to add to the kernel */
i1 = y + radius_plus_1;
if (i1 > height_minus_1)
i1 = height_minus_1;
c1 = p_src + (i1 * src_rowstride);
/* the pixel to remove from the kernel */
i2 = y - radius;
if (i2 < 0)
i2 = 0;
c2 = p_src + (i2 * src_rowstride);
/* calc the new sums of the kernel */
r += c1[0] - c2[0];
g += c1[1] - c2[1];
b += c1[2] - c2[2];
a += c1[3] - c2[3];
}
p_src += n_channels;
p_dest += n_channels;
}
}
static void
blur_image_surface (cairo_surface_t *surface, int radius, int iterations)
{
int kernel_size;
int i;
guchar *div_kernel_size;
cairo_surface_t *tmp;
int width, height;
g_assert (radius >= 0);
width = cairo_image_surface_get_width (surface);
height = cairo_image_surface_get_height (surface);
tmp = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, width, height);
kernel_size = 2 * radius + 1;
div_kernel_size = g_new (guchar, 256 * kernel_size);
for (i = 0; i < 256 * kernel_size; i++)
div_kernel_size[i] = (guchar) (i / kernel_size);
while (iterations-- > 0)
blur_once (surface, tmp, radius, div_kernel_size);
g_free (div_kernel_size);
cairo_surface_destroy (tmp);
}
static void
gsk_blur_node_draw (GskRenderNode *node,
cairo_t *cr)
{
GskBlurNode *self = (GskBlurNode *) node;
cairo_pattern_t *pattern;
cairo_surface_t *surface;
cairo_surface_t *image_surface;
cairo_save (cr);
/* clip so the push_group() creates a smaller surface */
gsk_cairo_rectangle (cr, &node->bounds);
cairo_clip (cr);
cairo_push_group (cr);
gsk_render_node_draw (self->child, cr);
pattern = cairo_pop_group (cr);
cairo_pattern_get_surface (pattern, &surface);
image_surface = cairo_surface_map_to_image (surface, NULL);
blur_image_surface (image_surface, (int)self->radius, 3);
cairo_surface_mark_dirty (surface);
cairo_surface_unmap_image (surface, image_surface);
cairo_set_source (cr, pattern);
cairo_rectangle (cr,
node->bounds.origin.x, node->bounds.origin.y,
node->bounds.size.width, node->bounds.size.height);
cairo_fill (cr);
cairo_restore (cr);
cairo_pattern_destroy (pattern);
}
static void
gsk_blur_node_diff (GskRenderNode *node1,
GskRenderNode *node2,
cairo_region_t *region)
{
GskBlurNode *self1 = (GskBlurNode *) node1;
GskBlurNode *self2 = (GskBlurNode *) node2;
if (self1->radius == self2->radius)
{
cairo_rectangle_int_t rect;
cairo_region_t *sub;
int i, n, clip_radius;
clip_radius = ceil (gsk_cairo_blur_compute_pixels (self1->radius / 2.0));
sub = cairo_region_create ();
gsk_render_node_diff (self1->child, self2->child, sub);
n = cairo_region_num_rectangles (sub);
for (i = 0; i < n; i++)
{
cairo_region_get_rectangle (sub, i, &rect);
rect.x -= clip_radius;
rect.y -= clip_radius;
rect.width += 2 * clip_radius;
rect.height += 2 * clip_radius;
cairo_region_union_rectangle (region, &rect);
}
cairo_region_destroy (sub);
}
else
{
gsk_render_node_diff_impossible (node1, node2, region);
}
}
static void
gsk_blur_node_class_init (gpointer g_class,
gpointer class_data)
{
GskRenderNodeClass *node_class = g_class;
node_class->node_type = GSK_BLUR_NODE;
node_class->finalize = gsk_blur_node_finalize;
node_class->draw = gsk_blur_node_draw;
node_class->diff = gsk_blur_node_diff;
}
/**
* gsk_blur_node_new:
* @child: the child node to blur
* @radius: the blur radius. Must be positive
*
* Creates a render node that blurs the child.
*
* Returns: (transfer full) (type GskBlurNode): a new `GskRenderNode`
*/
GskRenderNode *
gsk_blur_node_new (GskRenderNode *child,
float radius)
{
GskBlurNode *self;
GskRenderNode *node;
float clip_radius;
g_return_val_if_fail (GSK_IS_RENDER_NODE (child), NULL);
g_return_val_if_fail (radius >= 0, NULL);
self = gsk_render_node_alloc (GSK_BLUR_NODE);
node = (GskRenderNode *) self;
node->offscreen_for_opacity = child->offscreen_for_opacity;
self->child = gsk_render_node_ref (child);
self->radius = radius;
clip_radius = gsk_cairo_blur_compute_pixels (radius / 2.0);
graphene_rect_init_from_rect (&node->bounds, &child->bounds);
graphene_rect_inset (&self->render_node.bounds,
- clip_radius,
- clip_radius);
node->preferred_depth = gsk_render_node_get_preferred_depth (child);
return node;
}
/**
* gsk_blur_node_get_child:
* @node: (type GskBlurNode): a blur `GskRenderNode`
*
* Retrieves the child `GskRenderNode` of the blur @node.
*
* Returns: (transfer none): the blurred child node
*/
GskRenderNode *
gsk_blur_node_get_child (const GskRenderNode *node)
{
const GskBlurNode *self = (const GskBlurNode *) node;
return self->child;
}
/**
* gsk_blur_node_get_radius:
* @node: (type GskBlurNode): a blur `GskRenderNode`
*
* Retrieves the blur radius of the @node.
*
* Returns: the blur radius
*/
float
gsk_blur_node_get_radius (const GskRenderNode *node)
{
const GskBlurNode *self = (const GskBlurNode *) node;
return self->radius;
}
/* }}} */
/* {{{ GSK_MASK_NODE */
/**
* GskMaskNode:
*
* A render node masking one child node with another.
*
* Since: 4.10
*/
typedef struct _GskMaskNode GskMaskNode;
struct _GskMaskNode
{
GskRenderNode render_node;
GskRenderNode *mask;
GskRenderNode *source;
GskMaskMode mask_mode;
};
static void
gsk_mask_node_finalize (GskRenderNode *node)
{
GskMaskNode *self = (GskMaskNode *) node;
GskRenderNodeClass *parent_class = g_type_class_peek (g_type_parent (GSK_TYPE_MASK_NODE));
gsk_render_node_unref (self->source);
gsk_render_node_unref (self->mask);
parent_class->finalize (node);
}
static void
apply_luminance_to_pattern (cairo_pattern_t *pattern,
gboolean invert_luminance)
{
cairo_surface_t *surface, *image_surface;
guchar *data;
gsize x, y, width, height, stride;
int red, green, blue, alpha, luminance;
guint32* pixel_data;
cairo_pattern_get_surface (pattern, &surface);
image_surface = cairo_surface_map_to_image (surface, NULL);
data = cairo_image_surface_get_data (image_surface);
width = cairo_image_surface_get_width (image_surface);
height = cairo_image_surface_get_height (image_surface);
stride = cairo_image_surface_get_stride (image_surface);
for (y = 0; y < height; y++)
{
pixel_data = (guint32 *) data;
for (x = 0; x < width; x++)
{
alpha = (pixel_data[x] >> 24) & 0xFF;
red = (pixel_data[x] >> 16) & 0xFF;
green = (pixel_data[x] >> 8) & 0xFF;
blue = (pixel_data[x] >> 0) & 0xFF;
luminance = 2126 * red + 7152 * green + 722 * blue;
if (invert_luminance)
luminance = 10000 * alpha - luminance;
luminance = (luminance + 5000) / 10000;
pixel_data[x] = luminance * 0x1010101;
}
data += stride;
}
cairo_surface_mark_dirty (image_surface);
cairo_surface_unmap_image (surface, image_surface);
/* https://gitlab.freedesktop.org/cairo/cairo/-/merge_requests/487 */
cairo_surface_mark_dirty (surface);
}
static void
gsk_mask_node_draw (GskRenderNode *node,
cairo_t *cr)
{
GskMaskNode *self = (GskMaskNode *) node;
cairo_pattern_t *mask_pattern;
graphene_matrix_t color_matrix;
graphene_vec4_t color_offset;
cairo_push_group (cr);
gsk_render_node_draw (self->source, cr);
cairo_pop_group_to_source (cr);
cairo_push_group (cr);
gsk_render_node_draw (self->mask, cr);
mask_pattern = cairo_pop_group (cr);
switch (self->mask_mode)
{
case GSK_MASK_MODE_ALPHA:
break;
case GSK_MASK_MODE_INVERTED_ALPHA:
graphene_matrix_init_from_float (&color_matrix, (float[]){ 0, 0, 0, 0,
0, 0, 0, 0,
0, 0, 0, 0,
-1, -1, -1, -1 });
graphene_vec4_init (&color_offset, 1, 1, 1, 1);
apply_color_matrix_to_pattern (mask_pattern, &color_matrix, &color_offset);
break;
case GSK_MASK_MODE_LUMINANCE:
apply_luminance_to_pattern (mask_pattern, FALSE);
break;
case GSK_MASK_MODE_INVERTED_LUMINANCE:
apply_luminance_to_pattern (mask_pattern, TRUE);
break;
default:
g_assert_not_reached ();
}
gsk_cairo_rectangle (cr, &node->bounds);
cairo_clip (cr);
cairo_mask (cr, mask_pattern);
cairo_pattern_destroy (mask_pattern);
}
static void
gsk_mask_node_diff (GskRenderNode *node1,
GskRenderNode *node2,
cairo_region_t *region)
{
GskMaskNode *self1 = (GskMaskNode *) node1;
GskMaskNode *self2 = (GskMaskNode *) node2;
if (self1->mask_mode != self2->mask_mode)
{
gsk_render_node_diff_impossible (node1, node2, region);
return;
}
gsk_render_node_diff (self1->source, self2->source, region);
gsk_render_node_diff (self1->mask, self2->mask, region);
}
static void
gsk_mask_node_class_init (gpointer g_class,
gpointer class_data)
{
GskRenderNodeClass *node_class = g_class;
node_class->node_type = GSK_MASK_NODE;
node_class->finalize = gsk_mask_node_finalize;
node_class->draw = gsk_mask_node_draw;
node_class->diff = gsk_mask_node_diff;
}
/**
* gsk_mask_node_new:
* @source: The source node to be drawn
* @mask: The node to be used as mask
* @mask_mode: The mask mode to use
*
* Creates a `GskRenderNode` that will mask a given node by another.
*
* The @mask_mode determines how the 'mask values' are derived from
* the colors of the @mask. Applying the mask consists of multiplying
* the 'mask value' with the alpha of the source.
*
* Returns: (transfer full) (type GskMaskNode): A new `GskRenderNode`
*
* Since: 4.10
*/
GskRenderNode *
gsk_mask_node_new (GskRenderNode *source,
GskRenderNode *mask,
GskMaskMode mask_mode)
{
GskMaskNode *self;
g_return_val_if_fail (GSK_IS_RENDER_NODE (source), NULL);
g_return_val_if_fail (GSK_IS_RENDER_NODE (mask), NULL);
self = gsk_render_node_alloc (GSK_MASK_NODE);
self->source = gsk_render_node_ref (source);
self->mask = gsk_render_node_ref (mask);
self->mask_mode = mask_mode;
self->render_node.bounds = source->bounds;
self->render_node.preferred_depth = gsk_render_node_get_preferred_depth (source);
return &self->render_node;
}
/**
* gsk_mask_node_get_source:
* @node: (type GskMaskNode): a mask `GskRenderNode`
*
* Retrieves the source `GskRenderNode` child of the @node.
*
* Returns: (transfer none): the source child node
*
* Since: 4.10
*/
GskRenderNode *
gsk_mask_node_get_source (const GskRenderNode *node)
{
const GskMaskNode *self = (const GskMaskNode *) node;
g_return_val_if_fail (GSK_IS_RENDER_NODE_TYPE (node, GSK_MASK_NODE), NULL);
return self->source;
}
/**
* gsk_mask_node_get_mask:
* @node: (type GskMaskNode): a mask `GskRenderNode`
*
* Retrieves the mask `GskRenderNode` child of the @node.
*
* Returns: (transfer none): the mask child node
*
* Since: 4.10
*/
GskRenderNode *
gsk_mask_node_get_mask (const GskRenderNode *node)
{
const GskMaskNode *self = (const GskMaskNode *) node;
g_return_val_if_fail (GSK_IS_RENDER_NODE_TYPE (node, GSK_MASK_NODE), NULL);
return self->mask;
}
/**
* gsk_mask_node_get_mask_mode:
* @node: (type GskMaskNode): a blending `GskRenderNode`
*
* Retrieves the mask mode used by @node.
*
* Returns: the mask mode
*
* Since: 4.10
*/
GskMaskMode
gsk_mask_node_get_mask_mode (const GskRenderNode *node)
{
const GskMaskNode *self = (const GskMaskNode *) node;
return self->mask_mode;
}
/* }}} */
/* {{{ GSK_DEBUG_NODE */
/**
* GskDebugNode:
*
* A render node that emits a debugging message when drawing its
* child node.
*/
struct _GskDebugNode
{
GskRenderNode render_node;
GskRenderNode *child;
char *message;
};
static void
gsk_debug_node_finalize (GskRenderNode *node)
{
GskDebugNode *self = (GskDebugNode *) node;
GskRenderNodeClass *parent_class = g_type_class_peek (g_type_parent (GSK_TYPE_DEBUG_NODE));
gsk_render_node_unref (self->child);
g_free (self->message);
parent_class->finalize (node);
}
static void
gsk_debug_node_draw (GskRenderNode *node,
cairo_t *cr)
{
GskDebugNode *self = (GskDebugNode *) node;
gsk_render_node_draw (self->child, cr);
}
static gboolean
gsk_debug_node_can_diff (const GskRenderNode *node1,
const GskRenderNode *node2)
{
GskDebugNode *self1 = (GskDebugNode *) node1;
GskDebugNode *self2 = (GskDebugNode *) node2;
return gsk_render_node_can_diff (self1->child, self2->child);
}
static void
gsk_debug_node_diff (GskRenderNode *node1,
GskRenderNode *node2,
cairo_region_t *region)
{
GskDebugNode *self1 = (GskDebugNode *) node1;
GskDebugNode *self2 = (GskDebugNode *) node2;
gsk_render_node_diff (self1->child, self2->child, region);
}
static void
gsk_debug_node_class_init (gpointer g_class,
gpointer class_data)
{
GskRenderNodeClass *node_class = g_class;
node_class->node_type = GSK_DEBUG_NODE;
node_class->finalize = gsk_debug_node_finalize;
node_class->draw = gsk_debug_node_draw;
node_class->can_diff = gsk_debug_node_can_diff;
node_class->diff = gsk_debug_node_diff;
}
/**
* gsk_debug_node_new:
* @child: The child to add debug info for
* @message: (transfer full): The debug message
*
* Creates a `GskRenderNode` that will add debug information about
* the given @child.
*
* Adding this node has no visual effect.
*
* Returns: (transfer full) (type GskDebugNode): A new `GskRenderNode`
*/
GskRenderNode *
gsk_debug_node_new (GskRenderNode *child,
char *message)
{
GskDebugNode *self;
GskRenderNode *node;
g_return_val_if_fail (GSK_IS_RENDER_NODE (child), NULL);
self = gsk_render_node_alloc (GSK_DEBUG_NODE);
node = (GskRenderNode *) self;
node->offscreen_for_opacity = child->offscreen_for_opacity;
self->child = gsk_render_node_ref (child);
self->message = message;
graphene_rect_init_from_rect (&node->bounds, &child->bounds);
node->preferred_depth = gsk_render_node_get_preferred_depth (child);
return node;
}
/**
* gsk_debug_node_get_child:
* @node: (type GskDebugNode): a debug `GskRenderNode`
*
* Gets the child node that is getting drawn by the given @node.
*
* Returns: (transfer none): the child `GskRenderNode`
**/
GskRenderNode *
gsk_debug_node_get_child (const GskRenderNode *node)
{
const GskDebugNode *self = (const GskDebugNode *) node;
return self->child;
}
/**
* gsk_debug_node_get_message:
* @node: (type GskDebugNode): a debug `GskRenderNode`
*
* Gets the debug message that was set on this node
*
* Returns: (transfer none): The debug message
**/
const char *
gsk_debug_node_get_message (const GskRenderNode *node)
{
const GskDebugNode *self = (const GskDebugNode *) node;
return self->message;
}
/* }}} */
/* {{{ GSK_GL_SHADER_NODE */
/**
* GskGLShaderNode:
*
* A render node using a GL shader when drawing its children nodes.
*/
struct _GskGLShaderNode
{
GskRenderNode render_node;
GskGLShader *shader;
GBytes *args;
GskRenderNode **children;
guint n_children;
};
static void
gsk_gl_shader_node_finalize (GskRenderNode *node)
{
GskGLShaderNode *self = (GskGLShaderNode *) node;
GskRenderNodeClass *parent_class = g_type_class_peek (g_type_parent (GSK_TYPE_GL_SHADER_NODE));
for (guint i = 0; i < self->n_children; i++)
gsk_render_node_unref (self->children[i]);
g_free (self->children);
g_bytes_unref (self->args);
g_object_unref (self->shader);
parent_class->finalize (node);
}
static void
gsk_gl_shader_node_draw (GskRenderNode *node,
cairo_t *cr)
{
cairo_set_source_rgb (cr, 255 / 255., 105 / 255., 180 / 255.);
gsk_cairo_rectangle (cr, &node->bounds);
cairo_fill (cr);
}
static void
gsk_gl_shader_node_diff (GskRenderNode *node1,
GskRenderNode *node2,
cairo_region_t *region)
{
GskGLShaderNode *self1 = (GskGLShaderNode *) node1;
GskGLShaderNode *self2 = (GskGLShaderNode *) node2;
if (graphene_rect_equal (&node1->bounds, &node2->bounds) &&
self1->shader == self2->shader &&
g_bytes_compare (self1->args, self2->args) == 0 &&
self1->n_children == self2->n_children)
{
cairo_region_t *child_region = cairo_region_create();
for (guint i = 0; i < self1->n_children; i++)
gsk_render_node_diff (self1->children[i], self2->children[i], child_region);
if (!cairo_region_is_empty (child_region))
gsk_render_node_diff_impossible (node1, node2, region);
cairo_region_destroy (child_region);
}
else
{
gsk_render_node_diff_impossible (node1, node2, region);
}
}
static void
gsk_gl_shader_node_class_init (gpointer g_class,
gpointer class_data)
{
GskRenderNodeClass *node_class = g_class;
node_class->node_type = GSK_GL_SHADER_NODE;
node_class->finalize = gsk_gl_shader_node_finalize;
node_class->draw = gsk_gl_shader_node_draw;
node_class->diff = gsk_gl_shader_node_diff;
}
/**
* gsk_gl_shader_node_new:
* @shader: the `GskGLShader`
* @bounds: the rectangle to render the shader into
* @args: Arguments for the uniforms
* @children: (nullable) (array length=n_children): array of child nodes,
* these will be rendered to textures and used as input.
* @n_children: Length of @children (currently the GL backend supports
* up to 4 children)
*
* Creates a `GskRenderNode` that will render the given @shader into the
* area given by @bounds.
*
* The @args is a block of data to use for uniform input, as per types and
* offsets defined by the @shader. Normally this is generated by
* [method@Gsk.GLShader.format_args] or [struct@Gsk.ShaderArgsBuilder].
*
* See [class@Gsk.GLShader] for details about how the shader should be written.
*
* All the children will be rendered into textures (if they aren't already
* `GskTextureNodes`, which will be used directly). These textures will be
* sent as input to the shader.
*
* If the renderer doesn't support GL shaders, or if there is any problem
* when compiling the shader, then the node will draw pink. You should use
* [method@Gsk.GLShader.compile] to ensure the @shader will work for the
* renderer before using it.
*
* Returns: (transfer full) (type GskGLShaderNode): A new `GskRenderNode`
*/
GskRenderNode *
gsk_gl_shader_node_new (GskGLShader *shader,
const graphene_rect_t *bounds,
GBytes *args,
GskRenderNode **children,
guint n_children)
{
GskGLShaderNode *self;
GskRenderNode *node;
g_return_val_if_fail (GSK_IS_GL_SHADER (shader), NULL);
g_return_val_if_fail (bounds != NULL, NULL);
g_return_val_if_fail (args != NULL, NULL);
g_return_val_if_fail (g_bytes_get_size (args) == gsk_gl_shader_get_args_size (shader), NULL);
g_return_val_if_fail ((children == NULL && n_children == 0) ||
(n_children == gsk_gl_shader_get_n_textures (shader)), NULL);
self = gsk_render_node_alloc (GSK_GL_SHADER_NODE);
node = (GskRenderNode *) self;
node->offscreen_for_opacity = TRUE;
graphene_rect_init_from_rect (&node->bounds, bounds);
self->shader = g_object_ref (shader);
self->args = g_bytes_ref (args);
self->n_children = n_children;
if (n_children > 0)
{
self->children = g_malloc_n (n_children, sizeof (GskRenderNode *));
for (guint i = 0; i < n_children; i++)
{
self->children[i] = gsk_render_node_ref (children[i]);
node->preferred_depth = gdk_memory_depth_merge (node->preferred_depth,
gsk_render_node_get_preferred_depth (children[i]));
}
}
return node;
}
/**
* gsk_gl_shader_node_get_n_children:
* @node: (type GskGLShaderNode): a `GskRenderNode` for a gl shader
*
* Returns the number of children
*
* Returns: The number of children
*/
guint
gsk_gl_shader_node_get_n_children (const GskRenderNode *node)
{
const GskGLShaderNode *self = (const GskGLShaderNode *) node;
return self->n_children;
}
/**
* gsk_gl_shader_node_get_child:
* @node: (type GskGLShaderNode): a `GskRenderNode` for a gl shader
* @idx: the position of the child to get
*
* Gets one of the children.
*
* Returns: (transfer none): the @idx'th child of @node
*/
GskRenderNode *
gsk_gl_shader_node_get_child (const GskRenderNode *node,
guint idx)
{
const GskGLShaderNode *self = (const GskGLShaderNode *) node;
return self->children[idx];
}
/**
* gsk_gl_shader_node_get_shader:
* @node: (type GskGLShaderNode): a `GskRenderNode` for a gl shader
*
* Gets shader code for the node.
*
* Returns: (transfer none): the `GskGLShader` shader
*/
GskGLShader *
gsk_gl_shader_node_get_shader (const GskRenderNode *node)
{
const GskGLShaderNode *self = (const GskGLShaderNode *) node;
return self->shader;
}
/**
* gsk_gl_shader_node_get_args:
* @node: (type GskGLShaderNode): a `GskRenderNode` for a gl shader
*
* Gets args for the node.
*
* Returns: (transfer none): A `GBytes` with the uniform arguments
*/
GBytes *
gsk_gl_shader_node_get_args (const GskRenderNode *node)
{
const GskGLShaderNode *self = (const GskGLShaderNode *) node;
return self->args;
}
/* }}} */
GType gsk_render_node_types[GSK_RENDER_NODE_TYPE_N_TYPES];
#ifndef I_
# define I_(str) g_intern_static_string ((str))
#endif
#define GSK_DEFINE_RENDER_NODE_TYPE(type_name, TYPE_ENUM_VALUE) \
GType \
type_name ## _get_type (void) { \
gsk_render_node_init_types (); \
g_assert (gsk_render_node_types[TYPE_ENUM_VALUE] != G_TYPE_INVALID); \
return gsk_render_node_types[TYPE_ENUM_VALUE]; \
}
GSK_DEFINE_RENDER_NODE_TYPE (gsk_container_node, GSK_CONTAINER_NODE)
GSK_DEFINE_RENDER_NODE_TYPE (gsk_cairo_node, GSK_CAIRO_NODE)
GSK_DEFINE_RENDER_NODE_TYPE (gsk_color_node, GSK_COLOR_NODE)
GSK_DEFINE_RENDER_NODE_TYPE (gsk_linear_gradient_node, GSK_LINEAR_GRADIENT_NODE)
GSK_DEFINE_RENDER_NODE_TYPE (gsk_repeating_linear_gradient_node, GSK_REPEATING_LINEAR_GRADIENT_NODE)
GSK_DEFINE_RENDER_NODE_TYPE (gsk_radial_gradient_node, GSK_RADIAL_GRADIENT_NODE)
GSK_DEFINE_RENDER_NODE_TYPE (gsk_repeating_radial_gradient_node, GSK_REPEATING_RADIAL_GRADIENT_NODE)
GSK_DEFINE_RENDER_NODE_TYPE (gsk_conic_gradient_node, GSK_CONIC_GRADIENT_NODE)
GSK_DEFINE_RENDER_NODE_TYPE (gsk_border_node, GSK_BORDER_NODE)
GSK_DEFINE_RENDER_NODE_TYPE (gsk_texture_node, GSK_TEXTURE_NODE)
GSK_DEFINE_RENDER_NODE_TYPE (gsk_texture_scale_node, GSK_TEXTURE_SCALE_NODE)
GSK_DEFINE_RENDER_NODE_TYPE (gsk_inset_shadow_node, GSK_INSET_SHADOW_NODE)
GSK_DEFINE_RENDER_NODE_TYPE (gsk_outset_shadow_node, GSK_OUTSET_SHADOW_NODE)
GSK_DEFINE_RENDER_NODE_TYPE (gsk_transform_node, GSK_TRANSFORM_NODE)
GSK_DEFINE_RENDER_NODE_TYPE (gsk_opacity_node, GSK_OPACITY_NODE)
GSK_DEFINE_RENDER_NODE_TYPE (gsk_color_matrix_node, GSK_COLOR_MATRIX_NODE)
GSK_DEFINE_RENDER_NODE_TYPE (gsk_repeat_node, GSK_REPEAT_NODE)
GSK_DEFINE_RENDER_NODE_TYPE (gsk_clip_node, GSK_CLIP_NODE)
GSK_DEFINE_RENDER_NODE_TYPE (gsk_rounded_clip_node, GSK_ROUNDED_CLIP_NODE)
GSK_DEFINE_RENDER_NODE_TYPE (gsk_fill_node, GSK_FILL_NODE)
GSK_DEFINE_RENDER_NODE_TYPE (gsk_stroke_node, GSK_STROKE_NODE)
GSK_DEFINE_RENDER_NODE_TYPE (gsk_shadow_node, GSK_SHADOW_NODE)
GSK_DEFINE_RENDER_NODE_TYPE (gsk_blend_node, GSK_BLEND_NODE)
GSK_DEFINE_RENDER_NODE_TYPE (gsk_cross_fade_node, GSK_CROSS_FADE_NODE)
GSK_DEFINE_RENDER_NODE_TYPE (gsk_text_node, GSK_TEXT_NODE)
GSK_DEFINE_RENDER_NODE_TYPE (gsk_blur_node, GSK_BLUR_NODE)
GSK_DEFINE_RENDER_NODE_TYPE (gsk_mask_node, GSK_MASK_NODE)
GSK_DEFINE_RENDER_NODE_TYPE (gsk_gl_shader_node, GSK_GL_SHADER_NODE)
GSK_DEFINE_RENDER_NODE_TYPE (gsk_debug_node, GSK_DEBUG_NODE)
static void
gsk_render_node_init_types_once (void)
{
GType node_type;
node_type = gsk_render_node_type_register_static (I_("GskContainerNode"),
sizeof (GskContainerNode),
gsk_container_node_class_init);
gsk_render_node_types[GSK_CONTAINER_NODE] = node_type;
node_type = gsk_render_node_type_register_static (I_("GskCairoNode"),
sizeof (GskCairoNode),
gsk_cairo_node_class_init);
gsk_render_node_types[GSK_CAIRO_NODE] = node_type;
node_type = gsk_render_node_type_register_static (I_("GskColorNode"),
sizeof (GskColorNode),
gsk_color_node_class_init);
gsk_render_node_types[GSK_COLOR_NODE] = node_type;
node_type = gsk_render_node_type_register_static (I_("GskLinearGradientNode"),
sizeof (GskLinearGradientNode),
gsk_linear_gradient_node_class_init);
gsk_render_node_types[GSK_LINEAR_GRADIENT_NODE] = node_type;
node_type = gsk_render_node_type_register_static (I_("GskRepeatingLinearGradientNode"),
sizeof (GskLinearGradientNode),
gsk_repeating_linear_gradient_node_class_init);
gsk_render_node_types[GSK_REPEATING_LINEAR_GRADIENT_NODE] = node_type;
node_type = gsk_render_node_type_register_static (I_("GskRadialGradientNode"),
sizeof (GskRadialGradientNode),
gsk_radial_gradient_node_class_init);
gsk_render_node_types[GSK_RADIAL_GRADIENT_NODE] = node_type;
node_type = gsk_render_node_type_register_static (I_("GskRepeatingRadialGradientNode"),
sizeof (GskRadialGradientNode),
gsk_repeating_radial_gradient_node_class_init);
gsk_render_node_types[GSK_REPEATING_RADIAL_GRADIENT_NODE] = node_type;
node_type = gsk_render_node_type_register_static (I_("GskConicGradientNode"),
sizeof (GskConicGradientNode),
gsk_conic_gradient_node_class_init);
gsk_render_node_types[GSK_CONIC_GRADIENT_NODE] = node_type;
node_type = gsk_render_node_type_register_static (I_("GskBorderNode"),
sizeof (GskBorderNode),
gsk_border_node_class_init);
gsk_render_node_types[GSK_BORDER_NODE] = node_type;
node_type = gsk_render_node_type_register_static (I_("GskTextureNode"),
sizeof (GskTextureNode),
gsk_texture_node_class_init);
gsk_render_node_types[GSK_TEXTURE_NODE] = node_type;
node_type = gsk_render_node_type_register_static (I_("GskTextureScaleNode"),
sizeof (GskTextureScaleNode),
gsk_texture_scale_node_class_init);
gsk_render_node_types[GSK_TEXTURE_SCALE_NODE] = node_type;
node_type = gsk_render_node_type_register_static (I_("GskInsetShadowNode"),
sizeof (GskInsetShadowNode),
gsk_inset_shadow_node_class_init);
gsk_render_node_types[GSK_INSET_SHADOW_NODE] = node_type;
node_type = gsk_render_node_type_register_static (I_("GskOutsetShadowNode"),
sizeof (GskOutsetShadowNode),
gsk_outset_shadow_node_class_init);
gsk_render_node_types[GSK_OUTSET_SHADOW_NODE] = node_type;
node_type = gsk_render_node_type_register_static (I_("GskTransformNode"),
sizeof (GskTransformNode),
gsk_transform_node_class_init);
gsk_render_node_types[GSK_TRANSFORM_NODE] = node_type;
node_type = gsk_render_node_type_register_static (I_("GskOpacityNode"),
sizeof (GskOpacityNode),
gsk_opacity_node_class_init);
gsk_render_node_types[GSK_OPACITY_NODE] = node_type;
node_type = gsk_render_node_type_register_static (I_("GskColorMatrixNode"),
sizeof (GskColorMatrixNode),
gsk_color_matrix_node_class_init);
gsk_render_node_types[GSK_COLOR_MATRIX_NODE] = node_type;
node_type = gsk_render_node_type_register_static (I_("GskRepeatNode"),
sizeof (GskRepeatNode),
gsk_repeat_node_class_init);
gsk_render_node_types[GSK_REPEAT_NODE] = node_type;
node_type = gsk_render_node_type_register_static (I_("GskClipNode"),
sizeof (GskClipNode),
gsk_clip_node_class_init);
gsk_render_node_types[GSK_CLIP_NODE] = node_type;
node_type = gsk_render_node_type_register_static (I_("GskRoundedClipNode"),
sizeof (GskRoundedClipNode),
gsk_rounded_clip_node_class_init);
gsk_render_node_types[GSK_ROUNDED_CLIP_NODE] = node_type;
node_type = gsk_render_node_type_register_static (I_("GskShadowNode"),
sizeof (GskShadowNode),
gsk_shadow_node_class_init);
gsk_render_node_types[GSK_SHADOW_NODE] = node_type;
node_type = gsk_render_node_type_register_static (I_("GskBlendNode"),
sizeof (GskBlendNode),
gsk_blend_node_class_init);
gsk_render_node_types[GSK_BLEND_NODE] = node_type;
node_type = gsk_render_node_type_register_static (I_("GskCrossFadeNode"),
sizeof (GskCrossFadeNode),
gsk_cross_fade_node_class_init);
gsk_render_node_types[GSK_CROSS_FADE_NODE] = node_type;
node_type = gsk_render_node_type_register_static (I_("GskTextNode"),
sizeof (GskTextNode),
gsk_text_node_class_init);
gsk_render_node_types[GSK_TEXT_NODE] = node_type;
node_type = gsk_render_node_type_register_static (I_("GskBlurNode"),
sizeof (GskBlurNode),
gsk_blur_node_class_init);
gsk_render_node_types[GSK_BLUR_NODE] = node_type;
node_type = gsk_render_node_type_register_static (I_("GskMaskNode"),
sizeof (GskMaskNode),
gsk_mask_node_class_init);
gsk_render_node_types[GSK_MASK_NODE] = node_type;
node_type = gsk_render_node_type_register_static (I_("GskGLShaderNode"),
sizeof (GskGLShaderNode),
gsk_gl_shader_node_class_init);
gsk_render_node_types[GSK_GL_SHADER_NODE] = node_type;
node_type = gsk_render_node_type_register_static (I_("GskDebugNode"),
sizeof (GskDebugNode),
gsk_debug_node_class_init);
gsk_render_node_types[GSK_DEBUG_NODE] = node_type;
node_type = gsk_render_node_type_register_static (I_("GskFillNode"),
sizeof (GskFillNode),
gsk_fill_node_class_init);
gsk_render_node_types[GSK_FILL_NODE] = node_type;
node_type = gsk_render_node_type_register_static (I_("GskStrokeNode"),
sizeof (GskStrokeNode),
gsk_stroke_node_class_init);
gsk_render_node_types[GSK_STROKE_NODE] = node_type;
}
static void
gsk_render_node_serialize_bytes_finish (GObject *source,
GAsyncResult *result,
gpointer serializer)
{
GOutputStream *stream = G_OUTPUT_STREAM (source);
GError *error = NULL;
if (g_output_stream_splice_finish (stream, result, &error) < 0)
gdk_content_serializer_return_error (serializer, error);
else
gdk_content_serializer_return_success (serializer);
}
static void
gsk_render_node_serialize_bytes (GdkContentSerializer *serializer,
GBytes *bytes)
{
GInputStream *input;
input = g_memory_input_stream_new_from_bytes (bytes);
g_output_stream_splice_async (gdk_content_serializer_get_output_stream (serializer),
input,
G_OUTPUT_STREAM_SPLICE_CLOSE_SOURCE,
gdk_content_serializer_get_priority (serializer),
gdk_content_serializer_get_cancellable (serializer),
gsk_render_node_serialize_bytes_finish,
serializer);
g_object_unref (input);
g_bytes_unref (bytes);
}
#ifdef CAIRO_HAS_SVG_SURFACE
static cairo_status_t
gsk_render_node_cairo_serializer_write (gpointer user_data,
const unsigned char *data,
unsigned int length)
{
g_byte_array_append (user_data, data, length);
return CAIRO_STATUS_SUCCESS;
}
static void
gsk_render_node_svg_serializer (GdkContentSerializer *serializer)
{
GskRenderNode *node;
cairo_surface_t *surface;
cairo_t *cr;
graphene_rect_t bounds;
GByteArray *array;
node = gsk_value_get_render_node (gdk_content_serializer_get_value (serializer));
gsk_render_node_get_bounds (node, &bounds);
array = g_byte_array_new ();
surface = cairo_svg_surface_create_for_stream (gsk_render_node_cairo_serializer_write,
array,
bounds.size.width,
bounds.size.height);
cairo_svg_surface_set_document_unit (surface, CAIRO_SVG_UNIT_PX);
cairo_surface_set_device_offset (surface, -bounds.origin.x, -bounds.origin.y);
cr = cairo_create (surface);
gsk_render_node_draw (node, cr);
cairo_destroy (cr);
cairo_surface_finish (surface);
if (cairo_surface_status (surface) == CAIRO_STATUS_SUCCESS)
{
gsk_render_node_serialize_bytes (serializer, g_byte_array_free_to_bytes (array));
}
else
{
GError *error = g_error_new_literal (G_IO_ERROR, G_IO_ERROR_FAILED,
cairo_status_to_string (cairo_surface_status (surface)));
gdk_content_serializer_return_error (serializer, error);
g_byte_array_unref (array);
}
cairo_surface_destroy (surface);
}
#endif
static void
gsk_render_node_png_serializer (GdkContentSerializer *serializer)
{
GskRenderNode *node;
GdkTexture *texture;
GskRenderer *renderer;
GBytes *bytes;
node = gsk_value_get_render_node (gdk_content_serializer_get_value (serializer));
renderer = gsk_gl_renderer_new ();
if (!gsk_renderer_realize (renderer, NULL, NULL))
{
g_object_unref (renderer);
renderer = gsk_cairo_renderer_new ();
if (!gsk_renderer_realize (renderer, NULL, NULL))
{
g_assert_not_reached ();
}
}
texture = gsk_renderer_render_texture (renderer, node, NULL);
gsk_renderer_unrealize (renderer);
g_object_unref (renderer);
bytes = gdk_texture_save_to_png_bytes (texture);
g_object_unref (texture);
gsk_render_node_serialize_bytes (serializer, bytes);
}
static void
gsk_render_node_content_serializer (GdkContentSerializer *serializer)
{
const GValue *value;
GskRenderNode *node;
GBytes *bytes;
value = gdk_content_serializer_get_value (serializer);
node = gsk_value_get_render_node (value);
bytes = gsk_render_node_serialize (node);
gsk_render_node_serialize_bytes (serializer, bytes);
}
static void
gsk_render_node_content_deserializer_finish (GObject *source,
GAsyncResult *result,
gpointer deserializer)
{
GOutputStream *stream = G_OUTPUT_STREAM (source);
GError *error = NULL;
gssize written;
GValue *value;
GskRenderNode *node;
GBytes *bytes;
written = g_output_stream_splice_finish (stream, result, &error);
if (written < 0)
{
gdk_content_deserializer_return_error (deserializer, error);
return;
}
bytes = g_memory_output_stream_steal_as_bytes (G_MEMORY_OUTPUT_STREAM (stream));
/* For now, we ignore any parsing errors. We might want to revisit that if it turns
* out copy/paste leads to too many errors */
node = gsk_render_node_deserialize (bytes, NULL, NULL);
value = gdk_content_deserializer_get_value (deserializer);
gsk_value_take_render_node (value, node);
gdk_content_deserializer_return_success (deserializer);
}
static void
gsk_render_node_content_deserializer (GdkContentDeserializer *deserializer)
{
GOutputStream *output;
output = g_memory_output_stream_new_resizable ();
g_output_stream_splice_async (output,
gdk_content_deserializer_get_input_stream (deserializer),
G_OUTPUT_STREAM_SPLICE_CLOSE_SOURCE | G_OUTPUT_STREAM_SPLICE_CLOSE_TARGET,
gdk_content_deserializer_get_priority (deserializer),
gdk_content_deserializer_get_cancellable (deserializer),
gsk_render_node_content_deserializer_finish,
deserializer);
g_object_unref (output);
}
static void
gsk_render_node_init_content_serializers (void)
{
gdk_content_register_serializer (GSK_TYPE_RENDER_NODE,
"application/x-gtk-render-node",
gsk_render_node_content_serializer,
NULL,
NULL);
gdk_content_register_serializer (GSK_TYPE_RENDER_NODE,
"text/plain;charset=utf-8",
gsk_render_node_content_serializer,
NULL,
NULL);
/* The serialization format only outputs ASCII, so we can do this */
gdk_content_register_serializer (GSK_TYPE_RENDER_NODE,
"text/plain",
gsk_render_node_content_serializer,
NULL,
NULL);
#ifdef CAIRO_HAS_SVG_SURFACE
gdk_content_register_serializer (GSK_TYPE_RENDER_NODE,
"image/svg+xml",
gsk_render_node_svg_serializer,
NULL,
NULL);
#endif
gdk_content_register_serializer (GSK_TYPE_RENDER_NODE,
"image/png",
gsk_render_node_png_serializer,
NULL,
NULL);
gdk_content_register_deserializer ("application/x-gtk-render-node",
GSK_TYPE_RENDER_NODE,
gsk_render_node_content_deserializer,
NULL,
NULL);
}
/*< private >
* gsk_render_node_init_types:
*
* Initialize all the `GskRenderNode` types provided by GSK.
*/
void
gsk_render_node_init_types (void)
{
static gsize register_types__volatile;
if (g_once_init_enter (&register_types__volatile))
{
gboolean initialized = TRUE;
gsk_render_node_init_types_once ();
gsk_render_node_init_content_serializers ();
g_once_init_leave (&register_types__volatile, initialized);
}
}
/* vim:set foldmethod=marker expandtab: */
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