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gtk2/gsk/gskrendernodeimpl.c
Benjamin Otte fcc1f554d6 gsk: Add GskInsetShadowNode 
And again lots of shadow code gets copied to GSK. But we're now almost
at a stage where widget-factory does not use cairo nodes anymore.
2016-12-20 18:01:12 +01:00

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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 "gskrendernodeprivate.h"
#include "gskcairoblurprivate.h"
#include "gskdebugprivate.h"
#include "gskrendererprivate.h"
#include "gskroundedrectprivate.h"
#include "gsktextureprivate.h"
/*** GSK_COLOR_NODE ***/
typedef struct _GskColorNode GskColorNode;
struct _GskColorNode
{
GskRenderNode render_node;
GdkRGBA color;
graphene_rect_t bounds;
};
static void
gsk_color_node_finalize (GskRenderNode *node)
{
}
static void
gsk_color_node_make_immutable (GskRenderNode *node)
{
}
static void
gsk_color_node_draw (GskRenderNode *node,
cairo_t *cr)
{
GskColorNode *self = (GskColorNode *) node;
gdk_cairo_set_source_rgba (cr, &self->color);
cairo_rectangle (cr,
self->bounds.origin.x, self->bounds.origin.y,
self->bounds.size.width, self->bounds.size.height);
cairo_fill (cr);
}
static void
gsk_color_node_get_bounds (GskRenderNode *node,
graphene_rect_t *bounds)
{
GskColorNode *self = (GskColorNode *) node;
graphene_rect_init_from_rect (bounds, &self->bounds);
}
static const GskRenderNodeClass GSK_COLOR_NODE_CLASS = {
GSK_COLOR_NODE,
sizeof (GskColorNode),
"GskColorNode",
gsk_color_node_finalize,
gsk_color_node_make_immutable,
gsk_color_node_draw,
gsk_color_node_get_bounds
};
const GdkRGBA *
gsk_color_node_peek_color (GskRenderNode *node)
{
GskColorNode *self = (GskColorNode *) node;
return &self->color;
}
/**
* gsk_color_node_new:
* @color: the #GskColor
* @bounds: the rectangle to render the color into
*
* Creates a #GskRenderNode that will render the given
* @color into the area given by @bounds.
*
* Returns: A new #GskRenderNode
*
* Since: 3.90
*/
GskRenderNode *
gsk_color_node_new (const GdkRGBA *rgba,
const graphene_rect_t *bounds)
{
GskColorNode *self;
g_return_val_if_fail (rgba != NULL, NULL);
g_return_val_if_fail (bounds != NULL, NULL);
self = (GskColorNode *) gsk_render_node_new (&GSK_COLOR_NODE_CLASS);
self->color = *rgba;
graphene_rect_init_from_rect (&self->bounds, bounds);
return &self->render_node;
}
/*** GSK_LINEAR_GRADIENT_NODE ***/
typedef struct _GskLinearGradientNode GskLinearGradientNode;
struct _GskLinearGradientNode
{
GskRenderNode render_node;
graphene_rect_t bounds;
graphene_point_t start;
graphene_point_t end;
GskColorStop *stops;
gsize n_stops;
};
static void
gsk_linear_gradient_node_finalize (GskRenderNode *node)
{
GskLinearGradientNode *self = (GskLinearGradientNode *) node;
g_free (self->stops);
}
static void
gsk_linear_gradient_node_make_immutable (GskRenderNode *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);
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);
}
cairo_set_source (cr, pattern);
cairo_pattern_destroy (pattern);
cairo_rectangle (cr,
self->bounds.origin.x, self->bounds.origin.y,
self->bounds.size.width, self->bounds.size.height);
cairo_fill (cr);
}
static void
gsk_linear_gradient_node_get_bounds (GskRenderNode *node,
graphene_rect_t *bounds)
{
GskLinearGradientNode *self = (GskLinearGradientNode *) node;
graphene_rect_init_from_rect (bounds, &self->bounds);
}
static const GskRenderNodeClass GSK_LINEAR_GRADIENT_NODE_CLASS = {
GSK_LINEAR_GRADIENT_NODE,
sizeof (GskLinearGradientNode),
"GskLinearGradientNode",
gsk_linear_gradient_node_finalize,
gsk_linear_gradient_node_make_immutable,
gsk_linear_gradient_node_draw,
gsk_linear_gradient_node_get_bounds
};
static const GskRenderNodeClass GSK_REPEATING_LINEAR_GRADIENT_NODE_CLASS = {
GSK_REPEATING_LINEAR_GRADIENT_NODE,
sizeof (GskLinearGradientNode),
"GskLinearGradientNode",
gsk_linear_gradient_node_finalize,
gsk_linear_gradient_node_make_immutable,
gsk_linear_gradient_node_draw,
gsk_linear_gradient_node_get_bounds
};
/**
* gsk_linear_gradient_node_new:
* @linear_gradient: the #GskLinearGradient
* @bounds: the rectangle to render the linear_gradient into
*
* Creates a #GskRenderNode that will render the given
* @linear_gradient into the area given by @bounds.
*
* Returns: A new #GskRenderNode
*
* Since: 3.90
*/
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;
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);
self = (GskLinearGradientNode *) gsk_render_node_new (&GSK_LINEAR_GRADIENT_NODE_CLASS);
graphene_rect_init_from_rect (&self->bounds, bounds);
graphene_point_init_from_point (&self->start, start);
graphene_point_init_from_point (&self->end, end);
self->stops = g_memdup (color_stops, sizeof (GskColorStop) * n_color_stops);
self->n_stops = n_color_stops;
return &self->render_node;
}
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;
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);
self = (GskLinearGradientNode *) gsk_render_node_new (&GSK_REPEATING_LINEAR_GRADIENT_NODE_CLASS);
graphene_rect_init_from_rect (&self->bounds, bounds);
graphene_point_init_from_point (&self->start, start);
graphene_point_init_from_point (&self->end, end);
self->stops = g_memdup (color_stops, sizeof (GskColorStop) * n_color_stops);
self->n_stops = n_color_stops;
return &self->render_node;
}
/*** GSK_BORDER_NODE ***/
typedef struct _GskBorderNode GskBorderNode;
struct _GskBorderNode
{
GskRenderNode render_node;
GskRoundedRect outline;
float border_width[4];
GdkRGBA border_color[4];
};
static void
gsk_border_node_finalize (GskRenderNode *node)
{
}
static void
gsk_border_node_make_immutable (GskRenderNode *node)
{
}
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]);
cairo_fill (cr);
}
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 horiontal
* 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.
*/
float dst = MIN (bounds->size.width, bounds->size.height) / 2.0;
cairo_clip (cr);
/* top */
cairo_move_to (cr, bounds->origin.x + dst, bounds->origin.y + dst);
cairo_rel_line_to (cr, - dst, - dst);
cairo_rel_line_to (cr, bounds->size.width, 0);
cairo_rel_line_to (cr, - dst, dst);
gdk_cairo_set_source_rgba (cr, &self->border_color[0]);
cairo_fill (cr);
/* right */
cairo_move_to (cr, bounds->origin.x + bounds->size.width - dst, bounds->origin.y + dst);
cairo_rel_line_to (cr, dst, - dst);
cairo_rel_line_to (cr, 0, bounds->size.height);
cairo_rel_line_to (cr, - dst, - dst);
gdk_cairo_set_source_rgba (cr, &self->border_color[1]);
cairo_fill (cr);
/* bottom */
cairo_move_to (cr, bounds->origin.x + bounds->size.width - dst, bounds->origin.y + bounds->size.height - dst);
cairo_rel_line_to (cr, dst, dst);
cairo_rel_line_to (cr, - bounds->size.width, 0);
cairo_rel_line_to (cr, dst, - dst);
gdk_cairo_set_source_rgba (cr, &self->border_color[2]);
cairo_fill (cr);
/* left */
cairo_move_to (cr, bounds->origin.x + dst, bounds->origin.y + bounds->size.height - dst);
cairo_rel_line_to (cr, - dst, dst);
cairo_rel_line_to (cr, 0, - bounds->size.height);
cairo_rel_line_to (cr, dst, dst);
gdk_cairo_set_source_rgba (cr, &self->border_color[3]);
cairo_fill (cr);
}
cairo_restore (cr);
}
static void
gsk_border_node_get_bounds (GskRenderNode *node,
graphene_rect_t *bounds)
{
GskBorderNode *self = (GskBorderNode *) node;
graphene_rect_init_from_rect (bounds, &self->outline.bounds);
}
static const GskRenderNodeClass GSK_BORDER_NODE_CLASS = {
GSK_BORDER_NODE,
sizeof (GskBorderNode),
"GskBorderNode",
gsk_border_node_finalize,
gsk_border_node_make_immutable,
gsk_border_node_draw,
gsk_border_node_get_bounds
};
const GskRoundedRect *
gsk_border_node_peek_outline (GskRenderNode *node)
{
GskBorderNode *self = (GskBorderNode *) node;
return &self->outline;
}
float
gsk_border_node_get_width (GskRenderNode *node,
guint i)
{
GskBorderNode *self = (GskBorderNode *) node;
return self->border_width[i];
}
const GdkRGBA *
gsk_border_node_peek_color (GskRenderNode *node,
guint i)
{
GskBorderNode *self = (GskBorderNode *) node;
return &self->border_color[i];
}
/**
* gsk_border_node_new:
* @outline: a #GskRoundedRect describing the outline of the border
* @border_width: the stroke width of the border on the top, right, bottom and
* left side respectively.
* @border_color: 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: A new #GskRenderNode
*
* Since: 3.90
*/
GskRenderNode *
gsk_border_node_new (const GskRoundedRect *outline,
const float border_width[4],
const GdkRGBA border_color[4])
{
GskBorderNode *self;
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 = (GskBorderNode *) gsk_render_node_new (&GSK_BORDER_NODE_CLASS);
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));
return &self->render_node;
}
/*** GSK_TEXTURE_NODE ***/
typedef struct _GskTextureNode GskTextureNode;
struct _GskTextureNode
{
GskRenderNode render_node;
GskTexture *texture;
graphene_rect_t bounds;
};
static void
gsk_texture_node_finalize (GskRenderNode *node)
{
GskTextureNode *self = (GskTextureNode *) node;
gsk_texture_unref (self->texture);
}
static void
gsk_texture_node_make_immutable (GskRenderNode *node)
{
}
static void
gsk_texture_node_draw (GskRenderNode *node,
cairo_t *cr)
{
GskTextureNode *self = (GskTextureNode *) node;
cairo_surface_t *surface;
surface = gsk_texture_download (self->texture);
cairo_save (cr);
cairo_translate (cr, self->bounds.origin.x, self->bounds.origin.y);
cairo_scale (cr,
self->bounds.size.width / gsk_texture_get_width (self->texture),
self->bounds.size.height / gsk_texture_get_height (self->texture));
cairo_set_source_surface (cr, surface, 0, 0);
cairo_paint (cr);
cairo_restore (cr);
cairo_surface_destroy (surface);
}
static void
gsk_texture_node_get_bounds (GskRenderNode *node,
graphene_rect_t *bounds)
{
GskTextureNode *self = (GskTextureNode *) node;
graphene_rect_init_from_rect (bounds, &self->bounds);
}
static const GskRenderNodeClass GSK_TEXTURE_NODE_CLASS = {
GSK_TEXTURE_NODE,
sizeof (GskTextureNode),
"GskTextureNode",
gsk_texture_node_finalize,
gsk_texture_node_make_immutable,
gsk_texture_node_draw,
gsk_texture_node_get_bounds
};
GskTexture *
gsk_texture_node_get_texture (GskRenderNode *node)
{
GskTextureNode *self = (GskTextureNode *) node;
g_return_val_if_fail (GSK_IS_RENDER_NODE_TYPE (node, GSK_TEXTURE_NODE), 0);
return self->texture;
}
/**
* gsk_texture_node_new:
* @texture: the #GskTexture
* @bounds: the rectangle to render the texture into
*
* Creates a #GskRenderNode that will render the given
* @texture into the area given by @bounds.
*
* Returns: A new #GskRenderNode
*
* Since: 3.90
*/
GskRenderNode *
gsk_texture_node_new (GskTexture *texture,
const graphene_rect_t *bounds)
{
GskTextureNode *self;
g_return_val_if_fail (GSK_IS_TEXTURE (texture), NULL);
g_return_val_if_fail (bounds != NULL, NULL);
self = (GskTextureNode *) gsk_render_node_new (&GSK_TEXTURE_NODE_CLASS);
self->texture = gsk_texture_ref (texture);
graphene_rect_init_from_rect (&self->bounds, bounds);
return &self->render_node;
}
/*** GSK_INSET_SHADOW_NODE ***/
typedef struct _GskInsetShadowNode GskInsetShadowNode;
struct _GskInsetShadowNode
{
GskRenderNode render_node;
GskRoundedRect outline;
GdkRGBA color;
float dx;
float dy;
float spread;
float blur_radius;
};
static void
gsk_inset_shadow_node_finalize (GskRenderNode *node)
{
}
static void
gsk_inset_shadow_node_make_immutable (GskRenderNode *node)
{
}
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,
GskRoundedRect *box,
GskRoundedRect *clip_box,
float radius,
const GdkRGBA *color,
GskBlurFlags blur_flags)
{
cairo_t *shadow_cr;
gboolean do_blur;
if (has_empty_clip (cr))
return;
gdk_cairo_set_source_rgba (cr, color);
do_blur = (blur_flags & (GSK_BLUR_X | GSK_BLUR_Y)) != 0;
if (do_blur)
shadow_cr = gsk_cairo_blur_start_drawing (cr, radius, blur_flags);
else
shadow_cr = cr;
cairo_set_fill_rule (shadow_cr, CAIRO_FILL_RULE_EVEN_ODD);
gsk_rounded_rect_path (box, shadow_cr);
if (inset)
cairo_rectangle (cr,
clip_box->bounds.origin.x, clip_box->bounds.origin.y,
clip_box->bounds.size.width, clip_box->bounds.size.height);
cairo_fill (shadow_cr);
if (do_blur)
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,
GskRoundedRect *box,
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 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_memdup (&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,
GskRoundedRect *box,
GskRoundedRect *clip_box,
float radius,
const GdkRGBA *color,
Side side,
cairo_rectangle_int_t *drawn_rect)
{
GskBlurFlags blur_flags = GSK_BLUR_REPEAT;
gdouble 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 (GskInsetShadowNode *self)
{
/* The code doesn't actually do any blurring for radius 1, as it
* ends up with box filter size 1 */
if (self->blur_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;
double x1c, y1c, x2c, y2c;
/* We don't need to draw invisible shadows */
if (gdk_rgba_is_clear (&self->color))
return;
cairo_clip_extents (cr, &x1c, &y1c, &x2c, &y2c);
if (!gsk_rounded_rect_intersects_rect (&self->outline, &GRAPHENE_RECT_INIT (x1c, y1c, x2c - x1c, y2c - y1c)))
return;
clip_radius = gsk_cairo_blur_compute_pixels (self->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 (self))
draw_shadow (cr, TRUE, &box, &clip_box, self->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 enought 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, self->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, self->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, self->blur_radius, &self->color, GSK_BLUR_NONE);
cairo_restore (cr);
cairo_region_destroy (remaining);
}
cairo_restore (cr);
}
static void
gsk_inset_shadow_node_get_bounds (GskRenderNode *node,
graphene_rect_t *bounds)
{
GskInsetShadowNode *self = (GskInsetShadowNode *) node;
graphene_rect_init_from_rect (bounds, &self->outline.bounds);
}
static const GskRenderNodeClass GSK_INSET_SHADOW_NODE_CLASS = {
GSK_INSET_SHADOW_NODE,
sizeof (GskInsetShadowNode),
"GskInsetShadowNode",
gsk_inset_shadow_node_finalize,
gsk_inset_shadow_node_make_immutable,
gsk_inset_shadow_node_draw,
gsk_inset_shadow_node_get_bounds
};
/**
* 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: A new #GskRenderNode
*
* Since: 3.90
*/
GskRenderNode *
gsk_inset_shadow_node_new (const GskRoundedRect *outline,
const GdkRGBA *color,
float dx,
float dy,
float spread,
float blur_radius)
{
GskInsetShadowNode *self;
g_return_val_if_fail (outline != NULL, NULL);
g_return_val_if_fail (color != NULL, NULL);
self = (GskInsetShadowNode *) gsk_render_node_new (&GSK_INSET_SHADOW_NODE_CLASS);
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;
return &self->render_node;
}
/*** GSK_CAIRO_NODE ***/
typedef struct _GskCairoNode GskCairoNode;
struct _GskCairoNode
{
GskRenderNode render_node;
cairo_surface_t *surface;
graphene_rect_t bounds;
};
static void
gsk_cairo_node_finalize (GskRenderNode *node)
{
GskCairoNode *self = (GskCairoNode *) node;
if (self->surface)
cairo_surface_destroy (self->surface);
}
static void
gsk_cairo_node_make_immutable (GskRenderNode *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, self->bounds.origin.x, self->bounds.origin.y);
cairo_paint (cr);
}
static void
gsk_cairo_node_get_bounds (GskRenderNode *node,
graphene_rect_t *bounds)
{
GskCairoNode *self = (GskCairoNode *) node;
graphene_rect_init_from_rect (bounds, &self->bounds);
}
static const GskRenderNodeClass GSK_CAIRO_NODE_CLASS = {
GSK_CAIRO_NODE,
sizeof (GskCairoNode),
"GskCairoNode",
gsk_cairo_node_finalize,
gsk_cairo_node_make_immutable,
gsk_cairo_node_draw,
gsk_cairo_node_get_bounds
};
/*< private >
* gsk_cairo_node_get_surface:
* @node: a #GskRenderNode
*
* Retrieves the surface set using gsk_render_node_set_surface().
*
* Returns: (transfer none) (nullable): 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 the to
*
* Creates a #GskRenderNode that will render a cairo surface
* into the area given by @bounds. You can draw to the cairo
* surface using gsk_cairo_node_get_draw_context()
*
* Returns: A new #GskRenderNode
*
* Since: 3.90
*/
GskRenderNode *
gsk_cairo_node_new (const graphene_rect_t *bounds)
{
GskCairoNode *self;
g_return_val_if_fail (bounds != NULL, NULL);
self = (GskCairoNode *) gsk_render_node_new (&GSK_CAIRO_NODE_CLASS);
graphene_rect_init_from_rect (&self->bounds, bounds);
return &self->render_node;
}
/**
* gsk_cairo_node_get_draw_context:
* @node: a cairo #GskRenderNode
* @renderer: (nullable): Renderer to optimize for or %NULL for any
*
* 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
*
* Since: 3.90
*/
cairo_t *
gsk_cairo_node_get_draw_context (GskRenderNode *node,
GskRenderer *renderer)
{
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);
g_return_val_if_fail (node->is_mutable, NULL);
g_return_val_if_fail (renderer == NULL || GSK_IS_RENDERER (renderer), NULL);
width = ceilf (self->bounds.size.width);
height = ceilf (self->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)
{
if (renderer)
{
self->surface = gsk_renderer_create_cairo_surface (renderer,
CAIRO_FORMAT_ARGB32,
ceilf (self->bounds.size.width),
ceilf (self->bounds.size.height));
}
else
{
self->surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32,
ceilf (self->bounds.size.width),
ceilf (self->bounds.size.height));
}
res = cairo_create (self->surface);
}
else
{
res = cairo_create (self->surface);
}
cairo_translate (res, -self->bounds.origin.x, -self->bounds.origin.y);
cairo_rectangle (res,
self->bounds.origin.x, self->bounds.origin.y,
self->bounds.size.width, self->bounds.size.height);
cairo_clip (res);
if (GSK_DEBUG_CHECK (SURFACE))
{
const char *prefix;
prefix = g_getenv ("GSK_DEBUG_PREFIX");
if (!prefix || g_str_has_prefix (node->name, prefix))
{
cairo_save (res);
cairo_rectangle (res,
self->bounds.origin.x + 1, self->bounds.origin.y + 1,
self->bounds.size.width - 2, self->bounds.size.height - 2);
cairo_set_line_width (res, 2);
cairo_set_source_rgb (res, 1, 0, 0);
cairo_stroke (res);
cairo_restore (res);
}
}
return res;
}
/**** GSK_CONTAINER_NODE ***/
typedef struct _GskContainerNode GskContainerNode;
struct _GskContainerNode
{
GskRenderNode render_node;
GskRenderNode **children;
guint n_children;
};
static void
gsk_container_node_finalize (GskRenderNode *node)
{
GskContainerNode *container = (GskContainerNode *) node;
guint i;
for (i = 0; i < container->n_children; i++)
gsk_render_node_unref (container->children[i]);
g_free (container->children);
}
static void
gsk_container_node_make_immutable (GskRenderNode *node)
{
GskContainerNode *container = (GskContainerNode *) node;
guint i;
for (i = 1; i < container->n_children; i++)
{
gsk_render_node_make_immutable (container->children[i]);
}
}
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 void
gsk_container_node_get_bounds (GskRenderNode *node,
graphene_rect_t *bounds)
{
GskContainerNode *container = (GskContainerNode *) node;
guint i;
if (container->n_children == 0)
{
graphene_rect_init_from_rect (bounds, graphene_rect_zero());
return;
}
gsk_render_node_get_bounds (container->children[0], bounds);
for (i = 1; i < container->n_children; i++)
{
graphene_rect_t child_bounds;
gsk_render_node_get_bounds (container->children[i], &child_bounds);
graphene_rect_union (bounds, &child_bounds, bounds);
}
}
static const GskRenderNodeClass GSK_CONTAINER_NODE_CLASS = {
GSK_CONTAINER_NODE,
sizeof (GskContainerNode),
"GskContainerNode",
gsk_container_node_finalize,
gsk_container_node_make_immutable,
gsk_container_node_draw,
gsk_container_node_get_bounds
};
/**
* 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): the new #GskRenderNode
*
* Since: 3.90
*/
GskRenderNode *
gsk_container_node_new (GskRenderNode **children,
guint n_children)
{
GskContainerNode *container;
guint i;
container = (GskContainerNode *) gsk_render_node_new (&GSK_CONTAINER_NODE_CLASS);
container->children = g_memdup (children, sizeof (GskRenderNode *) * n_children);
container->n_children = n_children;
for (i = 0; i < container->n_children; i++)
gsk_render_node_ref (container->children[i]);
return &container->render_node;
}
/**
* gsk_container_node_get_n_children:
* @node: a container #GskRenderNode
*
* Retrieves the number of direct children of @node.
*
* Returns: the number of children of the #GskRenderNode
*
* Since: 3.90
*/
guint
gsk_container_node_get_n_children (GskRenderNode *node)
{
GskContainerNode *container = (GskContainerNode *) node;
g_return_val_if_fail (GSK_IS_RENDER_NODE_TYPE (node, GSK_CONTAINER_NODE), 0);
return container->n_children;
}
GskRenderNode *
gsk_container_node_get_child (GskRenderNode *node,
guint idx)
{
GskContainerNode *container = (GskContainerNode *) node;
g_return_val_if_fail (GSK_IS_RENDER_NODE_TYPE (node, GSK_CONTAINER_NODE), NULL);
g_return_val_if_fail (idx < container->n_children, 0);
return container->children[idx];
}
/*** GSK_TRANSFORM_NODE ***/
typedef struct _GskTransformNode GskTransformNode;
struct _GskTransformNode
{
GskRenderNode render_node;
GskRenderNode *child;
graphene_matrix_t transform;
};
static void
gsk_transform_node_finalize (GskRenderNode *node)
{
GskTransformNode *self = (GskTransformNode *) node;
gsk_render_node_unref (self->child);
}
static void
gsk_transform_node_make_immutable (GskRenderNode *node)
{
GskTransformNode *self = (GskTransformNode *) node;
gsk_render_node_make_immutable (self->child);
}
static void
gsk_transform_node_draw (GskRenderNode *node,
cairo_t *cr)
{
GskTransformNode *self = (GskTransformNode *) node;
cairo_matrix_t ctm;
if (graphene_matrix_to_2d (&self->transform, &ctm.xx, &ctm.yx, &ctm.xy, &ctm.yy, &ctm.x0, &ctm.y0))
{
GSK_NOTE (CAIRO, g_print ("CTM = { .xx = %g, .yx = %g, .xy = %g, .yy = %g, .x0 = %g, .y0 = %g }\n",
ctm.xx, ctm.yx,
ctm.xy, ctm.yy,
ctm.x0, ctm.y0));
cairo_transform (cr, &ctm);
gsk_render_node_draw (self->child, cr);
}
else
{
graphene_rect_t bounds;
gsk_render_node_get_bounds (node, &bounds);
cairo_set_source_rgb (cr, 255 / 255., 105 / 255., 180 / 255.);
cairo_rectangle (cr, bounds.origin.x, bounds.origin.x, bounds.size.width, bounds.size.height);
cairo_fill (cr);
}
}
static void
gsk_transform_node_get_bounds (GskRenderNode *node,
graphene_rect_t *bounds)
{
GskTransformNode *self = (GskTransformNode *) node;
graphene_rect_t child_bounds;
gsk_render_node_get_bounds (self->child, &child_bounds);
graphene_matrix_transform_bounds (&self->transform,
&child_bounds,
bounds);
}
static const GskRenderNodeClass GSK_TRANSFORM_NODE_CLASS = {
GSK_TRANSFORM_NODE,
sizeof (GskTransformNode),
"GskTransformNode",
gsk_transform_node_finalize,
gsk_transform_node_make_immutable,
gsk_transform_node_draw,
gsk_transform_node_get_bounds
};
/**
* gsk_transform_node_new:
* @child: The node to transform
* @transform: The transform to apply
*
* Creates a #GskRenderNode that will transform the given @child
* with the given @transform.
*
* Returns: A new #GskRenderNode
*
* Since: 3.90
*/
GskRenderNode *
gsk_transform_node_new (GskRenderNode *child,
const graphene_matrix_t *transform)
{
GskTransformNode *self;
g_return_val_if_fail (GSK_IS_RENDER_NODE (child), NULL);
g_return_val_if_fail (transform != NULL, NULL);
self = (GskTransformNode *) gsk_render_node_new (&GSK_TRANSFORM_NODE_CLASS);
self->child = gsk_render_node_ref (child);
graphene_matrix_init_from_matrix (&self->transform, transform);
return &self->render_node;
}
/**
* gsk_transform_node_get_child:
* @node: a transform @GskRenderNode
*
* 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 (GskRenderNode *node)
{
GskTransformNode *self = (GskTransformNode *) node;
g_return_val_if_fail (GSK_IS_RENDER_NODE_TYPE (node, GSK_TRANSFORM_NODE), NULL);
return self->child;
}
void
gsk_transform_node_get_transform (GskRenderNode *node,
graphene_matrix_t *transform)
{
GskTransformNode *self = (GskTransformNode *) node;
g_return_if_fail (GSK_IS_RENDER_NODE_TYPE (node, GSK_TRANSFORM_NODE));
graphene_matrix_init_from_matrix (transform, &self->transform);
}
/*** GSK_OPACITY_NODE ***/
typedef struct _GskOpacityNode GskOpacityNode;
struct _GskOpacityNode
{
GskRenderNode render_node;
GskRenderNode *child;
double opacity;
};
static void
gsk_opacity_node_finalize (GskRenderNode *node)
{
GskOpacityNode *self = (GskOpacityNode *) node;
gsk_render_node_unref (self->child);
}
static void
gsk_opacity_node_make_immutable (GskRenderNode *node)
{
GskOpacityNode *self = (GskOpacityNode *) node;
gsk_render_node_make_immutable (self->child);
}
static void
gsk_opacity_node_draw (GskRenderNode *node,
cairo_t *cr)
{
GskOpacityNode *self = (GskOpacityNode *) node;
graphene_rect_t bounds;
cairo_save (cr);
/* clip so the push_group() creates a smaller surface */
gsk_render_node_get_bounds (self->child, &bounds);
cairo_rectangle (cr, bounds.origin.x, bounds.origin.y, bounds.size.width, bounds.size.height);
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_get_bounds (GskRenderNode *node,
graphene_rect_t *bounds)
{
GskOpacityNode *self = (GskOpacityNode *) node;
gsk_render_node_get_bounds (self->child, bounds);
}
static const GskRenderNodeClass GSK_OPACITY_NODE_CLASS = {
GSK_OPACITY_NODE,
sizeof (GskOpacityNode),
"GskOpacityNode",
gsk_opacity_node_finalize,
gsk_opacity_node_make_immutable,
gsk_opacity_node_draw,
gsk_opacity_node_get_bounds
};
/**
* 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: A new #GskRenderNode
*
* Since: 3.90
*/
GskRenderNode *
gsk_opacity_node_new (GskRenderNode *child,
double opacity)
{
GskOpacityNode *self;
g_return_val_if_fail (GSK_IS_RENDER_NODE (child), NULL);
self = (GskOpacityNode *) gsk_render_node_new (&GSK_OPACITY_NODE_CLASS);
self->child = gsk_render_node_ref (child);
self->opacity = CLAMP (opacity, 0.0, 1.0);
return &self->render_node;
}
/**
* gsk_opacity_node_get_child:
* @node: a opacity @GskRenderNode
*
* 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 (GskRenderNode *node)
{
GskOpacityNode *self = (GskOpacityNode *) node;
g_return_val_if_fail (GSK_IS_RENDER_NODE_TYPE (node, GSK_OPACITY_NODE), NULL);
return self->child;
}
double
gsk_opacity_node_get_opacity (GskRenderNode *node)
{
GskOpacityNode *self = (GskOpacityNode *) node;
g_return_val_if_fail (GSK_IS_RENDER_NODE_TYPE (node, GSK_OPACITY_NODE), 1.0);
return self->opacity;
}
/*** GSK_CLIP_NODE ***/
typedef struct _GskClipNode GskClipNode;
struct _GskClipNode
{
GskRenderNode render_node;
GskRenderNode *child;
graphene_rect_t clip;
};
static void
gsk_clip_node_finalize (GskRenderNode *node)
{
GskClipNode *self = (GskClipNode *) node;
gsk_render_node_unref (self->child);
}
static void
gsk_clip_node_make_immutable (GskRenderNode *node)
{
GskClipNode *self = (GskClipNode *) node;
gsk_render_node_make_immutable (self->child);
}
static void
gsk_clip_node_draw (GskRenderNode *node,
cairo_t *cr)
{
GskClipNode *self = (GskClipNode *) node;
cairo_save (cr);
cairo_rectangle (cr,
self->clip.origin.x, self->clip.origin.y,
self->clip.size.width, self->clip.size.height);
cairo_clip (cr);
gsk_render_node_draw (self->child, cr);
cairo_restore (cr);
}
static void
gsk_clip_node_get_bounds (GskRenderNode *node,
graphene_rect_t *bounds)
{
GskClipNode *self = (GskClipNode *) node;
graphene_rect_t child_bounds;
gsk_render_node_get_bounds (self->child, &child_bounds);
graphene_rect_intersection (&self->clip, &child_bounds, bounds);
}
static const GskRenderNodeClass GSK_CLIP_NODE_CLASS = {
GSK_CLIP_NODE,
sizeof (GskClipNode),
"GskClipNode",
gsk_clip_node_finalize,
gsk_clip_node_make_immutable,
gsk_clip_node_draw,
gsk_clip_node_get_bounds
};
/**
* 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: A new #GskRenderNode
*
* Since: 3.90
*/
GskRenderNode *
gsk_clip_node_new (GskRenderNode *child,
const graphene_rect_t *clip)
{
GskClipNode *self;
g_return_val_if_fail (GSK_IS_RENDER_NODE (child), NULL);
g_return_val_if_fail (clip != NULL, NULL);
self = (GskClipNode *) gsk_render_node_new (&GSK_CLIP_NODE_CLASS);
self->child = gsk_render_node_ref (child);
graphene_rect_normalize_r (clip, &self->clip);
return &self->render_node;
}
/**
* gsk_clip_node_get_child:
* @node: 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 (GskRenderNode *node)
{
GskClipNode *self = (GskClipNode *) node;
g_return_val_if_fail (GSK_IS_RENDER_NODE_TYPE (node, GSK_CLIP_NODE), NULL);
return self->child;
}
const graphene_rect_t *
gsk_clip_node_peek_clip (GskRenderNode *node)
{
GskClipNode *self = (GskClipNode *) node;
g_return_val_if_fail (GSK_IS_RENDER_NODE_TYPE (node, GSK_CLIP_NODE), NULL);
return &self->clip;
}
/*** GSK_ROUNDED_CLIP_NODE ***/
typedef struct _GskRoundedClipNode GskRoundedClipNode;
struct _GskRoundedClipNode
{
GskRenderNode render_node;
GskRenderNode *child;
GskRoundedRect clip;
};
static void
gsk_rounded_clip_node_finalize (GskRenderNode *node)
{
GskRoundedClipNode *self = (GskRoundedClipNode *) node;
gsk_render_node_unref (self->child);
}
static void
gsk_rounded_clip_node_make_immutable (GskRenderNode *node)
{
GskRoundedClipNode *self = (GskRoundedClipNode *) node;
gsk_render_node_make_immutable (self->child);
}
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_get_bounds (GskRenderNode *node,
graphene_rect_t *bounds)
{
GskRoundedClipNode *self = (GskRoundedClipNode *) node;
graphene_rect_t child_bounds;
gsk_render_node_get_bounds (self->child, &child_bounds);
graphene_rect_intersection (&self->clip.bounds, &child_bounds, bounds);
}
static const GskRenderNodeClass GSK_ROUNDED_CLIP_NODE_CLASS = {
GSK_ROUNDED_CLIP_NODE,
sizeof (GskRoundedClipNode),
"GskRoundedClipNode",
gsk_rounded_clip_node_finalize,
gsk_rounded_clip_node_make_immutable,
gsk_rounded_clip_node_draw,
gsk_rounded_clip_node_get_bounds
};
/**
* 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: A new #GskRenderNode
*
* Since: 3.90
*/
GskRenderNode *
gsk_rounded_clip_node_new (GskRenderNode *child,
const GskRoundedRect *clip)
{
GskRoundedClipNode *self;
g_return_val_if_fail (GSK_IS_RENDER_NODE (child), NULL);
g_return_val_if_fail (clip != NULL, NULL);
self = (GskRoundedClipNode *) gsk_render_node_new (&GSK_ROUNDED_CLIP_NODE_CLASS);
self->child = gsk_render_node_ref (child);
gsk_rounded_rect_init_copy (&self->clip, clip);
return &self->render_node;
}
/**
* gsk_rounded_clip_node_get_child:
* @node: 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_rounded_clip_node_get_child (GskRenderNode *node)
{
GskRoundedClipNode *self = (GskRoundedClipNode *) node;
g_return_val_if_fail (GSK_IS_RENDER_NODE_TYPE (node, GSK_ROUNDED_CLIP_NODE), NULL);
return self->child;
}
const GskRoundedRect *
gsk_rounded_clip_node_peek_clip (GskRenderNode *node)
{
GskRoundedClipNode *self = (GskRoundedClipNode *) node;
g_return_val_if_fail (GSK_IS_RENDER_NODE_TYPE (node, GSK_ROUNDED_CLIP_NODE), NULL);
return &self->clip;
}
/*** GSK_SHADOW_NODE ***/
typedef struct _GskShadowNode GskShadowNode;
struct _GskShadowNode
{
GskRenderNode render_node;
GskRenderNode *child;
GskShadow *shadows;
gsize n_shadows;
};
static void
gsk_shadow_node_finalize (GskRenderNode *node)
{
GskShadowNode *self = (GskShadowNode *) node;
gsk_render_node_unref (self->child);
g_free (self->shadows);
}
static void
gsk_shadow_node_make_immutable (GskRenderNode *node)
{
GskShadowNode *self = (GskShadowNode *) node;
gsk_render_node_make_immutable (self->child);
}
static void
gsk_shadow_node_draw (GskRenderNode *node,
cairo_t *cr)
{
GskShadowNode *self = (GskShadowNode *) node;
cairo_pattern_t *pattern;
gsize i;
cairo_push_group (cr);
gsk_render_node_draw (self->child, cr);
pattern = cairo_pop_group (cr);
for (i = 0; i < self->n_shadows; i++)
{
GskShadow *shadow = &self->shadows[i];
/* We don't need to draw invisible shadows */
if (gdk_rgba_is_clear (&shadow->color))
continue;
cairo_save (cr);
gdk_cairo_set_source_rgba (cr, &shadow->color);
cr = gsk_cairo_blur_start_drawing (cr, shadow->radius, GSK_BLUR_X | GSK_BLUR_Y);
cairo_translate (cr, shadow->dx, shadow->dy);
cairo_mask (cr, pattern);
cr = gsk_cairo_blur_finish_drawing (cr, shadow->radius, &shadow->color, GSK_BLUR_X | GSK_BLUR_Y);
cairo_restore (cr);
}
cairo_set_source (cr, pattern);
cairo_paint (cr);
cairo_pattern_destroy (pattern);
}
static void
gsk_shadow_node_get_bounds (GskRenderNode *node,
graphene_rect_t *bounds)
{
GskShadowNode *self = (GskShadowNode *) node;
float top = 0, right = 0, bottom = 0, left = 0;
gsize i;
gsk_render_node_get_bounds (self->child, bounds);
for (i = 0; i < self->n_shadows; i++)
{
float clip_radius = gsk_cairo_blur_compute_pixels (self->shadows[i].radius);
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 const GskRenderNodeClass GSK_SHADOW_NODE_CLASS = {
GSK_SHADOW_NODE,
sizeof (GskShadowNode),
"GskShadowNode",
gsk_shadow_node_finalize,
gsk_shadow_node_make_immutable,
gsk_shadow_node_draw,
gsk_shadow_node_get_bounds
};
/**
* 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: A new #GskRenderNode
*
* Since: 3.90
*/
GskRenderNode *
gsk_shadow_node_new (GskRenderNode *child,
const GskShadow *shadows,
gsize n_shadows)
{
GskShadowNode *self;
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 = (GskShadowNode *) gsk_render_node_new (&GSK_SHADOW_NODE_CLASS);
self->child = gsk_render_node_ref (child);
self->shadows = g_memdup (shadows, n_shadows * sizeof (GskShadow));
self->n_shadows = n_shadows;
return &self->render_node;
}
GskRenderNode *
gsk_shadow_node_get_child (GskRenderNode *node)
{
GskShadowNode *self = (GskShadowNode *) node;
g_return_val_if_fail (GSK_IS_RENDER_NODE_TYPE (node, GSK_SHADOW_NODE), NULL);
return self->child;
}
const GskShadow *
gsk_shadow_node_peek_shadow (GskRenderNode *node,
gsize i)
{
GskShadowNode *self = (GskShadowNode *) node;
g_return_val_if_fail (GSK_IS_RENDER_NODE_TYPE (node, GSK_SHADOW_NODE), NULL);
g_return_val_if_fail (i < self->n_shadows, NULL);
return &self->shadows[i];
}
gsize
gsk_shadow_node_get_n_shadows (GskRenderNode *node)
{
GskShadowNode *self = (GskShadowNode *) node;
g_return_val_if_fail (GSK_IS_RENDER_NODE_TYPE (node, GSK_SHADOW_NODE), 0);
return self->n_shadows;
}
/*** GSK_BLEND_NODE ***/
typedef struct _GskBlendNode GskBlendNode;
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;
gsk_render_node_unref (self->bottom);
gsk_render_node_unref (self->top);
}
static void
gsk_blend_node_make_immutable (GskRenderNode *node)
{
GskBlendNode *self = (GskBlendNode *) node;
gsk_render_node_make_immutable (self->bottom);
gsk_render_node_make_immutable (self->top);
}
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_get_bounds (GskRenderNode *node,
graphene_rect_t *bounds)
{
GskBlendNode *self = (GskBlendNode *) node;
graphene_rect_t bottom_bounds, top_bounds;
gsk_render_node_get_bounds (self->bottom, &bottom_bounds);
gsk_render_node_get_bounds (self->top, &top_bounds);
graphene_rect_union (&bottom_bounds, &top_bounds, bounds);
}
static const GskRenderNodeClass GSK_BLEND_NODE_CLASS = {
GSK_BLEND_NODE,
sizeof (GskBlendNode),
"GskBlendNode",
gsk_blend_node_finalize,
gsk_blend_node_make_immutable,
gsk_blend_node_draw,
gsk_blend_node_get_bounds
};
/**
* 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: A new #GskRenderNode
*
* Since: 3.90
*/
GskRenderNode *
gsk_blend_node_new (GskRenderNode *bottom,
GskRenderNode *top,
GskBlendMode blend_mode)
{
GskBlendNode *self;
g_return_val_if_fail (GSK_IS_RENDER_NODE (bottom), NULL);
g_return_val_if_fail (GSK_IS_RENDER_NODE (top), NULL);
self = (GskBlendNode *) gsk_render_node_new (&GSK_BLEND_NODE_CLASS);
self->bottom = gsk_render_node_ref (bottom);
self->top = gsk_render_node_ref (top);
self->blend_mode = blend_mode;
return &self->render_node;
}
GskRenderNode *
gsk_blend_node_get_bottom_child (GskRenderNode *node)
{
GskBlendNode *self = (GskBlendNode *) node;
g_return_val_if_fail (GSK_IS_RENDER_NODE_TYPE (node, GSK_BLEND_NODE), NULL);
return self->bottom;
}
GskRenderNode *
gsk_blend_node_get_top_child (GskRenderNode *node)
{
GskBlendNode *self = (GskBlendNode *) node;
g_return_val_if_fail (GSK_IS_RENDER_NODE_TYPE (node, GSK_BLEND_NODE), NULL);
return self->top;
}
GskBlendMode
gsk_blend_node_get_blend_mode (GskRenderNode *node)
{
GskBlendNode *self = (GskBlendNode *) node;
g_return_val_if_fail (GSK_IS_RENDER_NODE_TYPE (node, GSK_BLEND_NODE), GSK_BLEND_MODE_DEFAULT);
return self->blend_mode;
}
/*** GSK_CROSS_FADE_NODE ***/
typedef struct _GskCrossFadeNode GskCrossFadeNode;
struct _GskCrossFadeNode
{
GskRenderNode render_node;
GskRenderNode *start;
GskRenderNode *end;
double progress;
};
static void
gsk_cross_fade_node_finalize (GskRenderNode *node)
{
GskCrossFadeNode *self = (GskCrossFadeNode *) node;
gsk_render_node_unref (self->start);
gsk_render_node_unref (self->end);
}
static void
gsk_cross_fade_node_make_immutable (GskRenderNode *node)
{
GskCrossFadeNode *self = (GskCrossFadeNode *) node;
gsk_render_node_make_immutable (self->start);
gsk_render_node_make_immutable (self->end);
}
static void
gsk_cross_fade_node_draw (GskRenderNode *node,
cairo_t *cr)
{
GskCrossFadeNode *self = (GskCrossFadeNode *) node;
cairo_push_group (cr);
gsk_render_node_draw (self->start, cr);
cairo_push_group (cr);
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_get_bounds (GskRenderNode *node,
graphene_rect_t *bounds)
{
GskCrossFadeNode *self = (GskCrossFadeNode *) node;
graphene_rect_t start_bounds, end_bounds;
gsk_render_node_get_bounds (self->start, &start_bounds);
gsk_render_node_get_bounds (self->end, &end_bounds);
graphene_rect_union (&start_bounds, &end_bounds, bounds);
}
static const GskRenderNodeClass GSK_CROSS_FADE_NODE_CLASS = {
GSK_CROSS_FADE_NODE,
sizeof (GskCrossFadeNode),
"GskCrossFadeNode",
gsk_cross_fade_node_finalize,
gsk_cross_fade_node_make_immutable,
gsk_cross_fade_node_draw,
gsk_cross_fade_node_get_bounds
};
/**
* 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: A new #GskRenderNode
*
* Since: 3.90
*/
GskRenderNode *
gsk_cross_fade_node_new (GskRenderNode *start,
GskRenderNode *end,
double progress)
{
GskCrossFadeNode *self;
g_return_val_if_fail (GSK_IS_RENDER_NODE (start), NULL);
g_return_val_if_fail (GSK_IS_RENDER_NODE (end), NULL);
self = (GskCrossFadeNode *) gsk_render_node_new (&GSK_CROSS_FADE_NODE_CLASS);
self->start = gsk_render_node_ref (start);
self->end = gsk_render_node_ref (end);
self->progress = CLAMP (progress, 0.0, 1.0);
return &self->render_node;
}
GskRenderNode *
gsk_cross_fade_node_get_start_child (GskRenderNode *node)
{
GskCrossFadeNode *self = (GskCrossFadeNode *) node;
g_return_val_if_fail (GSK_IS_RENDER_NODE_TYPE (node, GSK_CROSS_FADE_NODE), NULL);
return self->start;
}
GskRenderNode *
gsk_cross_fade_node_get_end_child (GskRenderNode *node)
{
GskCrossFadeNode *self = (GskCrossFadeNode *) node;
g_return_val_if_fail (GSK_IS_RENDER_NODE_TYPE (node, GSK_CROSS_FADE_NODE), NULL);
return self->end;
}
double
gsk_cross_fade_node_get_progress (GskRenderNode *node)
{
GskCrossFadeNode *self = (GskCrossFadeNode *) node;
g_return_val_if_fail (GSK_IS_RENDER_NODE_TYPE (node, GSK_CROSS_FADE_NODE), 0.0);
return self->progress;
}
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