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gtk/gtk/gtkrender.c
Matthias Clasen 6f829d4450 Silence another compiler warning 
Again, our habit of comparing enum values against -1.
2015-03-22 15:20:43 -04:00

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/* GTK - The GIMP Toolkit
* Copyright (C) 2010 Carlos Garnacho <carlosg@gnome.org>
*
* 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 "gtkrender.h"
#include "gtkrenderprivate.h"
#include <math.h>
#include "gtkcsscornervalueprivate.h"
#include "gtkcssenumvalueprivate.h"
#include "gtkcssimagebuiltinprivate.h"
#include "gtkcssimagevalueprivate.h"
#include "gtkcssnumbervalueprivate.h"
#include "gtkcssrgbavalueprivate.h"
#include "gtkcssshadowsvalueprivate.h"
#include "gtkcsstransformvalueprivate.h"
#include "gtkhslaprivate.h"
#include "gtkrenderbackgroundprivate.h"
#include "gtkrenderborderprivate.h"
#include "gtkrendericonprivate.h"
#include "gtkstylecontextprivate.h"
#include "fallback-c89.c"
static void
gtk_do_render_check (GtkStyleContext *context,
cairo_t *cr,
gdouble x,
gdouble y,
gdouble width,
gdouble height)
{
GtkStateFlags state;
GtkCssImageBuiltinType image_type;
state = gtk_style_context_get_state (context);
if (state & GTK_STATE_FLAG_INCONSISTENT)
image_type = GTK_CSS_IMAGE_BUILTIN_CHECK_INCONSISTENT;
else if (state & GTK_STATE_FLAG_CHECKED)
image_type = GTK_CSS_IMAGE_BUILTIN_CHECK_CHECKED;
else
image_type = GTK_CSS_IMAGE_BUILTIN_CHECK;
gtk_css_style_render_icon (gtk_style_context_lookup_style (context), cr, x, y, width, height, image_type);
}
/**
* gtk_render_check:
* @context: a #GtkStyleContext
* @cr: a #cairo_t
* @x: X origin of the rectangle
* @y: Y origin of the rectangle
* @width: rectangle width
* @height: rectangle height
*
* Renders a checkmark (as in a #GtkCheckButton).
*
* The %GTK_STATE_FLAG_CHECKED state determines whether the check is
* on or off, and %GTK_STATE_FLAG_INCONSISTENT determines whether it
* should be marked as undefined.
*
* Typical checkmark rendering:
*
* ![](checks.png)
*
* Since: 3.0
**/
void
gtk_render_check (GtkStyleContext *context,
cairo_t *cr,
gdouble x,
gdouble y,
gdouble width,
gdouble height)
{
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (cr != NULL);
if (width <= 0 || height <= 0)
return;
cairo_save (cr);
cairo_new_path (cr);
gtk_do_render_check (context, cr, x, y, width, height);
cairo_restore (cr);
}
static void
gtk_do_render_option (GtkStyleContext *context,
cairo_t *cr,
gdouble x,
gdouble y,
gdouble width,
gdouble height)
{
GtkStateFlags state;
GtkCssImageBuiltinType image_type;
state = gtk_style_context_get_state (context);
if (state & GTK_STATE_FLAG_INCONSISTENT)
image_type = GTK_CSS_IMAGE_BUILTIN_OPTION_INCONSISTENT;
else if (state & GTK_STATE_FLAG_CHECKED)
image_type = GTK_CSS_IMAGE_BUILTIN_OPTION_CHECKED;
else
image_type = GTK_CSS_IMAGE_BUILTIN_OPTION;
gtk_css_style_render_icon (gtk_style_context_lookup_style (context), cr, x, y, width, height, image_type);
}
/**
* gtk_render_option:
* @context: a #GtkStyleContext
* @cr: a #cairo_t
* @x: X origin of the rectangle
* @y: Y origin of the rectangle
* @width: rectangle width
* @height: rectangle height
*
* Renders an option mark (as in a #GtkRadioButton), the %GTK_STATE_FLAG_CHECKED
* state will determine whether the option is on or off, and
* %GTK_STATE_FLAG_INCONSISTENT whether it should be marked as undefined.
*
* Typical option mark rendering:
*
* ![](options.png)
*
* Since: 3.0
**/
void
gtk_render_option (GtkStyleContext *context,
cairo_t *cr,
gdouble x,
gdouble y,
gdouble width,
gdouble height)
{
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (cr != NULL);
if (width <= 0 || height <= 0)
return;
cairo_save (cr);
cairo_new_path (cr);
gtk_do_render_option (context, cr, x, y, width, height);
cairo_restore (cr);
}
static void
gtk_do_render_arrow (GtkStyleContext *context,
cairo_t *cr,
gdouble angle,
gdouble x,
gdouble y,
gdouble size)
{
GtkCssImageBuiltinType image_type;
/* map [0, 2 * pi) to [0, 4) */
angle = round (2 * angle / G_PI);
switch (((int) angle) & 3)
{
case 0:
image_type = GTK_CSS_IMAGE_BUILTIN_ARROW_UP;
break;
case 1:
image_type = GTK_CSS_IMAGE_BUILTIN_ARROW_RIGHT;
break;
case 2:
image_type = GTK_CSS_IMAGE_BUILTIN_ARROW_DOWN;
break;
case 3:
image_type = GTK_CSS_IMAGE_BUILTIN_ARROW_LEFT;
break;
default:
g_assert_not_reached ();
image_type = GTK_CSS_IMAGE_BUILTIN_ARROW_UP;
break;
}
gtk_css_style_render_icon (gtk_style_context_lookup_style (context), cr, x, y, size, size, image_type);
}
/**
* gtk_render_arrow:
* @context: a #GtkStyleContext
* @cr: a #cairo_t
* @angle: arrow angle from 0 to 2 * %G_PI, being 0 the arrow pointing to the north
* @x: X origin of the render area
* @y: Y origin of the render area
* @size: square side for render area
*
* Renders an arrow pointing to @angle.
*
* Typical arrow rendering at 0, 1&solidus;2 &pi;, &pi; and 3&solidus;2 &pi;:
*
* ![](arrows.png)
*
* Since: 3.0
**/
void
gtk_render_arrow (GtkStyleContext *context,
cairo_t *cr,
gdouble angle,
gdouble x,
gdouble y,
gdouble size)
{
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (cr != NULL);
if (size <= 0)
return;
cairo_save (cr);
cairo_new_path (cr);
gtk_style_context_save (context);
gtk_style_context_add_class (context, GTK_STYLE_CLASS_ARROW);
gtk_do_render_arrow (context, cr, angle, x, y, size);
gtk_style_context_restore (context);
cairo_restore (cr);
}
/**
* gtk_render_background:
* @context: a #GtkStyleContext
* @cr: a #cairo_t
* @x: X origin of the rectangle
* @y: Y origin of the rectangle
* @width: rectangle width
* @height: rectangle height
*
* Renders the background of an element.
*
* Typical background rendering, showing the effect of
* `background-image`, `border-width` and `border-radius`:
*
* ![](background.png)
*
* Since: 3.0.
**/
void
gtk_render_background (GtkStyleContext *context,
cairo_t *cr,
gdouble x,
gdouble y,
gdouble width,
gdouble height)
{
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (cr != NULL);
if (width <= 0 || height <= 0)
return;
cairo_save (cr);
cairo_new_path (cr);
gtk_css_style_render_background (gtk_style_context_lookup_style (context),
cr, x, y, width, height,
gtk_style_context_get_junction_sides (context));
cairo_restore (cr);
}
/**
* gtk_render_frame:
* @context: a #GtkStyleContext
* @cr: a #cairo_t
* @x: X origin of the rectangle
* @y: Y origin of the rectangle
* @width: rectangle width
* @height: rectangle height
*
* Renders a frame around the rectangle defined by @x, @y, @width, @height.
*
* Examples of frame rendering, showing the effect of `border-image`,
* `border-color`, `border-width`, `border-radius` and junctions:
*
* ![](frames.png)
*
* Since: 3.0
**/
void
gtk_render_frame (GtkStyleContext *context,
cairo_t *cr,
gdouble x,
gdouble y,
gdouble width,
gdouble height)
{
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (cr != NULL);
if (width <= 0 || height <= 0)
return;
cairo_save (cr);
cairo_new_path (cr);
gtk_css_style_render_border (gtk_style_context_lookup_style (context),
cr,
x, y, width, height,
0,
gtk_style_context_get_junction_sides (context));
cairo_restore (cr);
}
static void
gtk_do_render_expander (GtkStyleContext *context,
cairo_t *cr,
gdouble x,
gdouble y,
gdouble width,
gdouble height)
{
GtkCssImageBuiltinType image_type;
GtkStateFlags state;
state = gtk_style_context_get_state (context);
if (gtk_style_context_has_class (context, "horizontal"))
{
if (state & GTK_STATE_FLAG_DIR_RTL)
image_type = (state & GTK_STATE_FLAG_CHECKED)
? GTK_CSS_IMAGE_BUILTIN_EXPANDER_HORIZONTAL_RIGHT_EXPANDED
: GTK_CSS_IMAGE_BUILTIN_EXPANDER_HORIZONTAL_RIGHT;
else
image_type = (state & GTK_STATE_FLAG_CHECKED)
? GTK_CSS_IMAGE_BUILTIN_EXPANDER_HORIZONTAL_LEFT_EXPANDED
: GTK_CSS_IMAGE_BUILTIN_EXPANDER_HORIZONTAL_LEFT;
}
else
{
if (state & GTK_STATE_FLAG_DIR_RTL)
image_type = (state & GTK_STATE_FLAG_CHECKED)
? GTK_CSS_IMAGE_BUILTIN_EXPANDER_VERTICAL_RIGHT_EXPANDED
: GTK_CSS_IMAGE_BUILTIN_EXPANDER_VERTICAL_RIGHT;
else
image_type = (state & GTK_STATE_FLAG_CHECKED)
? GTK_CSS_IMAGE_BUILTIN_EXPANDER_VERTICAL_LEFT_EXPANDED
: GTK_CSS_IMAGE_BUILTIN_EXPANDER_VERTICAL_LEFT;
}
gtk_css_style_render_icon (gtk_style_context_lookup_style (context), cr, x, y, width, height, image_type);
}
/**
* gtk_render_expander:
* @context: a #GtkStyleContext
* @cr: a #cairo_t
* @x: X origin of the rectangle
* @y: Y origin of the rectangle
* @width: rectangle width
* @height: rectangle height
*
* Renders an expander (as used in #GtkTreeView and #GtkExpander) in the area
* defined by @x, @y, @width, @height. The state %GTK_STATE_FLAG_CHECKED
* determines whether the expander is collapsed or expanded.
*
* Typical expander rendering:
*
* ![](expanders.png)
*
* Since: 3.0
**/
void
gtk_render_expander (GtkStyleContext *context,
cairo_t *cr,
gdouble x,
gdouble y,
gdouble width,
gdouble height)
{
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (cr != NULL);
if (width <= 0 || height <= 0)
return;
cairo_save (cr);
cairo_new_path (cr);
gtk_do_render_expander (context, cr, x, y, width, height);
cairo_restore (cr);
}
/**
* gtk_render_focus:
* @context: a #GtkStyleContext
* @cr: a #cairo_t
* @x: X origin of the rectangle
* @y: Y origin of the rectangle
* @width: rectangle width
* @height: rectangle height
*
* Renders a focus indicator on the rectangle determined by @x, @y, @width, @height.
*
* Typical focus rendering:
*
* ![](focus.png)
*
* Since: 3.0
**/
void
gtk_render_focus (GtkStyleContext *context,
cairo_t *cr,
gdouble x,
gdouble y,
gdouble width,
gdouble height)
{
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (cr != NULL);
if (width <= 0 || height <= 0)
return;
cairo_save (cr);
cairo_new_path (cr);
gtk_css_style_render_outline (gtk_style_context_lookup_style (context),
cr,
x, y, width, height);
cairo_restore (cr);
}
static void
prepare_context_for_layout (cairo_t *cr,
gdouble x,
gdouble y,
PangoLayout *layout)
{
const PangoMatrix *matrix;
matrix = pango_context_get_matrix (pango_layout_get_context (layout));
cairo_move_to (cr, x, y);
if (matrix)
{
cairo_matrix_t cairo_matrix;
cairo_matrix_init (&cairo_matrix,
matrix->xx, matrix->yx,
matrix->xy, matrix->yy,
matrix->x0, matrix->y0);
cairo_transform (cr, &cairo_matrix);
}
}
static void
gtk_do_render_layout (GtkStyleContext *context,
cairo_t *cr,
gdouble x,
gdouble y,
PangoLayout *layout)
{
const GdkRGBA *fg_color;
cairo_save (cr);
fg_color = _gtk_css_rgba_value_get_rgba (_gtk_style_context_peek_property (context, GTK_CSS_PROPERTY_COLOR));
prepare_context_for_layout (cr, x, y, layout);
_gtk_css_shadows_value_paint_layout (_gtk_style_context_peek_property (context, GTK_CSS_PROPERTY_TEXT_SHADOW),
cr, layout);
gdk_cairo_set_source_rgba (cr, fg_color);
pango_cairo_show_layout (cr, layout);
cairo_restore (cr);
}
/**
* gtk_render_layout:
* @context: a #GtkStyleContext
* @cr: a #cairo_t
* @x: X origin
* @y: Y origin
* @layout: the #PangoLayout to render
*
* Renders @layout on the coordinates @x, @y
*
* Since: 3.0
**/
void
gtk_render_layout (GtkStyleContext *context,
cairo_t *cr,
gdouble x,
gdouble y,
PangoLayout *layout)
{
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (PANGO_IS_LAYOUT (layout));
g_return_if_fail (cr != NULL);
cairo_save (cr);
cairo_new_path (cr);
gtk_do_render_layout (context, cr, x, y, layout);
cairo_restore (cr);
}
static void
gtk_do_render_line (GtkStyleContext *context,
cairo_t *cr,
gdouble x0,
gdouble y0,
gdouble x1,
gdouble y1)
{
const GdkRGBA *color;
cairo_save (cr);
color = _gtk_css_rgba_value_get_rgba (_gtk_style_context_peek_property (context, GTK_CSS_PROPERTY_COLOR));
cairo_set_line_cap (cr, CAIRO_LINE_CAP_SQUARE);
cairo_set_line_width (cr, 1);
cairo_move_to (cr, x0 + 0.5, y0 + 0.5);
cairo_line_to (cr, x1 + 0.5, y1 + 0.5);
gdk_cairo_set_source_rgba (cr, color);
cairo_stroke (cr);
cairo_restore (cr);
}
/**
* gtk_render_line:
* @context: a #GtkStyleContext
* @cr: a #cairo_t
* @x0: X coordinate for the origin of the line
* @y0: Y coordinate for the origin of the line
* @x1: X coordinate for the end of the line
* @y1: Y coordinate for the end of the line
*
* Renders a line from (x0, y0) to (x1, y1).
*
* Since: 3.0
**/
void
gtk_render_line (GtkStyleContext *context,
cairo_t *cr,
gdouble x0,
gdouble y0,
gdouble x1,
gdouble y1)
{
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (cr != NULL);
cairo_save (cr);
cairo_new_path (cr);
gtk_do_render_line (context, cr, x0, y0, x1, y1);
cairo_restore (cr);
}
static void
gtk_do_render_slider (GtkStyleContext *context,
cairo_t *cr,
gdouble x,
gdouble y,
gdouble width,
gdouble height,
GtkOrientation orientation)
{
GtkCssStyle *style;
GtkJunctionSides junction;
style = gtk_style_context_lookup_style (context);
junction = gtk_style_context_get_junction_sides (context);
gtk_css_style_render_background (style,
cr,
x, y, width, height,
junction);
gtk_css_style_render_border (style,
cr,
x, y, width, height,
0,
junction);
}
/**
* gtk_render_slider:
* @context: a #GtkStyleContext
* @cr: a #cairo_t
* @x: X origin of the rectangle
* @y: Y origin of the rectangle
* @width: rectangle width
* @height: rectangle height
* @orientation: orientation of the slider
*
* Renders a slider (as in #GtkScale) in the rectangle defined by @x, @y,
* @width, @height. @orientation defines whether the slider is vertical
* or horizontal.
*
* Typical slider rendering:
*
* ![](sliders.png)
*
* Since: 3.0
**/
void
gtk_render_slider (GtkStyleContext *context,
cairo_t *cr,
gdouble x,
gdouble y,
gdouble width,
gdouble height,
GtkOrientation orientation)
{
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (cr != NULL);
if (width <= 0 || height <= 0)
return;
cairo_save (cr);
cairo_new_path (cr);
gtk_do_render_slider (context, cr, x, y, width, height, orientation);
cairo_restore (cr);
}
static void
gtk_css_style_render_frame_gap (GtkCssStyle *style,
cairo_t *cr,
gdouble x,
gdouble y,
gdouble width,
gdouble height,
GtkPositionType gap_side,
gdouble xy0_gap,
gdouble xy1_gap,
GtkJunctionSides junction)
{
gint border_width;
GtkCssValue *corner[4];
gdouble x0, y0, x1, y1, xc = 0.0, yc = 0.0, wc = 0.0, hc = 0.0;
GtkBorder border;
border.top = _gtk_css_number_value_get (gtk_css_style_get_value (style, GTK_CSS_PROPERTY_BORDER_TOP_WIDTH), 100);
border.right = _gtk_css_number_value_get (gtk_css_style_get_value (style, GTK_CSS_PROPERTY_BORDER_RIGHT_WIDTH), 100);
border.bottom = _gtk_css_number_value_get (gtk_css_style_get_value (style, GTK_CSS_PROPERTY_BORDER_BOTTOM_WIDTH), 100);
border.left = _gtk_css_number_value_get (gtk_css_style_get_value (style, GTK_CSS_PROPERTY_BORDER_LEFT_WIDTH), 100);
corner[GTK_CSS_TOP_LEFT] = gtk_css_style_get_value (style, GTK_CSS_PROPERTY_BORDER_TOP_LEFT_RADIUS);
corner[GTK_CSS_TOP_RIGHT] = gtk_css_style_get_value (style, GTK_CSS_PROPERTY_BORDER_TOP_RIGHT_RADIUS);
corner[GTK_CSS_BOTTOM_LEFT] = gtk_css_style_get_value (style, GTK_CSS_PROPERTY_BORDER_BOTTOM_LEFT_RADIUS);
corner[GTK_CSS_BOTTOM_RIGHT] = gtk_css_style_get_value (style, GTK_CSS_PROPERTY_BORDER_BOTTOM_RIGHT_RADIUS);
border_width = MIN (MIN (border.top, border.bottom),
MIN (border.left, border.right));
cairo_save (cr);
switch (gap_side)
{
case GTK_POS_TOP:
xc = x + xy0_gap + border_width;
yc = y;
wc = MAX (xy1_gap - xy0_gap - 2 * border_width, 0);
hc = border_width;
if (xy0_gap < _gtk_css_corner_value_get_x (corner[GTK_CSS_TOP_LEFT], width))
junction |= GTK_JUNCTION_CORNER_TOPLEFT;
if (xy1_gap > width - _gtk_css_corner_value_get_x (corner[GTK_CSS_TOP_RIGHT], width))
junction |= GTK_JUNCTION_CORNER_TOPRIGHT;
break;
case GTK_POS_BOTTOM:
xc = x + xy0_gap + border_width;
yc = y + height - border_width;
wc = MAX (xy1_gap - xy0_gap - 2 * border_width, 0);
hc = border_width;
if (xy0_gap < _gtk_css_corner_value_get_x (corner[GTK_CSS_BOTTOM_LEFT], width))
junction |= GTK_JUNCTION_CORNER_BOTTOMLEFT;
if (xy1_gap > width - _gtk_css_corner_value_get_x (corner[GTK_CSS_BOTTOM_RIGHT], width))
junction |= GTK_JUNCTION_CORNER_BOTTOMRIGHT;
break;
case GTK_POS_LEFT:
xc = x;
yc = y + xy0_gap + border_width;
wc = border_width;
hc = MAX (xy1_gap - xy0_gap - 2 * border_width, 0);
if (xy0_gap < _gtk_css_corner_value_get_y (corner[GTK_CSS_TOP_LEFT], height))
junction |= GTK_JUNCTION_CORNER_TOPLEFT;
if (xy1_gap > height - _gtk_css_corner_value_get_y (corner[GTK_CSS_BOTTOM_LEFT], height))
junction |= GTK_JUNCTION_CORNER_BOTTOMLEFT;
break;
case GTK_POS_RIGHT:
xc = x + width - border_width;
yc = y + xy0_gap + border_width;
wc = border_width;
hc = MAX (xy1_gap - xy0_gap - 2 * border_width, 0);
if (xy0_gap < _gtk_css_corner_value_get_y (corner[GTK_CSS_TOP_RIGHT], height))
junction |= GTK_JUNCTION_CORNER_TOPRIGHT;
if (xy1_gap > height - _gtk_css_corner_value_get_y (corner[GTK_CSS_BOTTOM_RIGHT], height))
junction |= GTK_JUNCTION_CORNER_BOTTOMRIGHT;
break;
}
cairo_clip_extents (cr, &x0, &y0, &x1, &y1);
cairo_rectangle (cr, x0, y0, x1 - x0, yc - y0);
cairo_rectangle (cr, x0, yc, xc - x0, hc);
cairo_rectangle (cr, xc + wc, yc, x1 - (xc + wc), hc);
cairo_rectangle (cr, x0, yc + hc, x1 - x0, y1 - (yc + hc));
cairo_clip (cr);
gtk_css_style_render_border (style, cr,
x, y, width, height,
0, junction);
cairo_restore (cr);
}
/**
* gtk_render_frame_gap:
* @context: a #GtkStyleContext
* @cr: a #cairo_t
* @x: X origin of the rectangle
* @y: Y origin of the rectangle
* @width: rectangle width
* @height: rectangle height
* @gap_side: side where the gap is
* @xy0_gap: initial coordinate (X or Y depending on @gap_side) for the gap
* @xy1_gap: end coordinate (X or Y depending on @gap_side) for the gap
*
* Renders a frame around the rectangle defined by (@x, @y, @width, @height),
* leaving a gap on one side. @xy0_gap and @xy1_gap will mean X coordinates
* for %GTK_POS_TOP and %GTK_POS_BOTTOM gap sides, and Y coordinates for
* %GTK_POS_LEFT and %GTK_POS_RIGHT.
*
* Typical rendering of a frame with a gap:
*
* ![](frame-gap.png)
*
* Since: 3.0
**/
void
gtk_render_frame_gap (GtkStyleContext *context,
cairo_t *cr,
gdouble x,
gdouble y,
gdouble width,
gdouble height,
GtkPositionType gap_side,
gdouble xy0_gap,
gdouble xy1_gap)
{
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (cr != NULL);
g_return_if_fail (xy0_gap <= xy1_gap);
g_return_if_fail (xy0_gap >= 0);
if (width <= 0 || height <= 0)
return;
if (gap_side == GTK_POS_LEFT ||
gap_side == GTK_POS_RIGHT)
g_return_if_fail (xy1_gap <= height);
else
g_return_if_fail (xy1_gap <= width);
cairo_save (cr);
cairo_new_path (cr);
gtk_css_style_render_frame_gap (gtk_style_context_lookup_style (context),
cr,
x, y, width, height, gap_side,
xy0_gap, xy1_gap,
gtk_style_context_get_junction_sides (context));
cairo_restore (cr);
}
static void
gtk_css_style_render_extension (GtkCssStyle *style,
cairo_t *cr,
gdouble x,
gdouble y,
gdouble width,
gdouble height,
GtkPositionType gap_side)
{
GtkJunctionSides junction = 0;
guint hidden_side = 0;
switch (gap_side)
{
case GTK_POS_LEFT:
junction = GTK_JUNCTION_LEFT;
hidden_side = (1 << GTK_CSS_LEFT);
break;
case GTK_POS_RIGHT:
junction = GTK_JUNCTION_RIGHT;
hidden_side = (1 << GTK_CSS_RIGHT);
break;
case GTK_POS_TOP:
junction = GTK_JUNCTION_TOP;
hidden_side = (1 << GTK_CSS_TOP);
break;
case GTK_POS_BOTTOM:
junction = GTK_JUNCTION_BOTTOM;
hidden_side = (1 << GTK_CSS_BOTTOM);
break;
}
gtk_css_style_render_background (style,
cr,
x, y,
width, height,
junction);
gtk_css_style_render_border (style, cr,
x, y, width, height,
hidden_side, junction);
}
/**
* gtk_render_extension:
* @context: a #GtkStyleContext
* @cr: a #cairo_t
* @x: X origin of the rectangle
* @y: Y origin of the rectangle
* @width: rectangle width
* @height: rectangle height
* @gap_side: side where the gap is
*
* Renders a extension (as in a #GtkNotebook tab) in the rectangle
* defined by @x, @y, @width, @height. The side where the extension
* connects to is defined by @gap_side.
*
* Typical extension rendering:
*
* ![](extensions.png)
*
* Since: 3.0
**/
void
gtk_render_extension (GtkStyleContext *context,
cairo_t *cr,
gdouble x,
gdouble y,
gdouble width,
gdouble height,
GtkPositionType gap_side)
{
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (cr != NULL);
if (width <= 0 || height <= 0)
return;
cairo_save (cr);
cairo_new_path (cr);
gtk_css_style_render_extension (gtk_style_context_lookup_style (context),
cr,
x, y, width, height,
gap_side);
cairo_restore (cr);
}
static void
gtk_do_render_handle (GtkStyleContext *context,
cairo_t *cr,
gdouble x,
gdouble y,
gdouble width,
gdouble height)
{
GtkCssImageBuiltinType type;
gtk_render_background (context, cr, x, y, width, height);
gtk_render_frame (context, cr, x, y, width, height);
if (gtk_style_context_has_class (context, GTK_STYLE_CLASS_GRIP))
{
GtkJunctionSides sides = gtk_style_context_get_junction_sides (context);
/* order is important here for when too many (or too few) sides are set */
if ((sides & GTK_JUNCTION_CORNER_BOTTOMRIGHT) == GTK_JUNCTION_CORNER_BOTTOMRIGHT)
type = GTK_CSS_IMAGE_BUILTIN_GRIP_BOTTOMRIGHT;
else if ((sides & GTK_JUNCTION_CORNER_TOPRIGHT) == GTK_JUNCTION_CORNER_TOPRIGHT)
type = GTK_CSS_IMAGE_BUILTIN_GRIP_TOPRIGHT;
else if ((sides & GTK_JUNCTION_CORNER_BOTTOMLEFT) == GTK_JUNCTION_CORNER_BOTTOMLEFT)
type = GTK_CSS_IMAGE_BUILTIN_GRIP_BOTTOMLEFT;
else if ((sides & GTK_JUNCTION_CORNER_TOPLEFT) == GTK_JUNCTION_CORNER_TOPLEFT)
type = GTK_CSS_IMAGE_BUILTIN_GRIP_TOPLEFT;
else if (sides & GTK_JUNCTION_RIGHT)
type = GTK_CSS_IMAGE_BUILTIN_GRIP_RIGHT;
else if (sides & GTK_JUNCTION_BOTTOM)
type = GTK_CSS_IMAGE_BUILTIN_GRIP_BOTTOM;
else if (sides & GTK_JUNCTION_TOP)
type = GTK_CSS_IMAGE_BUILTIN_GRIP_TOP;
else if (sides & GTK_JUNCTION_LEFT)
type = GTK_CSS_IMAGE_BUILTIN_GRIP_LEFT;
else
type = GTK_CSS_IMAGE_BUILTIN_GRIP_BOTTOMRIGHT;
}
else if (gtk_style_context_has_class (context, GTK_STYLE_CLASS_PANE_SEPARATOR))
{
type = GTK_CSS_IMAGE_BUILTIN_PANE_SEPARATOR;
}
else
{
type = GTK_CSS_IMAGE_BUILTIN_HANDLE;
}
gtk_css_style_render_icon (gtk_style_context_lookup_style (context), cr, x, y, width, height, type);
}
/**
* gtk_render_handle:
* @context: a #GtkStyleContext
* @cr: a #cairo_t
* @x: X origin of the rectangle
* @y: Y origin of the rectangle
* @width: rectangle width
* @height: rectangle height
*
* Renders a handle (as in #GtkHandleBox, #GtkPaned and
* #GtkWindow’s resize grip), in the rectangle
* determined by @x, @y, @width, @height.
*
* Handles rendered for the paned and grip classes:
*
* ![](handles.png)
*
* Since: 3.0
**/
void
gtk_render_handle (GtkStyleContext *context,
cairo_t *cr,
gdouble x,
gdouble y,
gdouble width,
gdouble height)
{
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (cr != NULL);
if (width <= 0 || height <= 0)
return;
cairo_save (cr);
cairo_new_path (cr);
gtk_do_render_handle (context, cr, x, y, width, height);
cairo_restore (cr);
}
/**
* gtk_render_activity:
* @context: a #GtkStyleContext
* @cr: a #cairo_t
* @x: X origin of the rectangle
* @y: Y origin of the rectangle
* @width: rectangle width
* @height: rectangle height
*
* Renders an activity indicator (such as in #GtkSpinner).
* The state %GTK_STATE_FLAG_CHECKED determines whether there is
* activity going on.
*
* Since: 3.0
**/
void
gtk_render_activity (GtkStyleContext *context,
cairo_t *cr,
gdouble x,
gdouble y,
gdouble width,
gdouble height)
{
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (cr != NULL);
if (width <= 0 || height <= 0)
return;
cairo_save (cr);
cairo_new_path (cr);
gtk_css_style_render_icon (gtk_style_context_lookup_style (context), cr, x, y, width, height, GTK_CSS_IMAGE_BUILTIN_SPINNER);
cairo_restore (cr);
}
static void
colorshift_source (cairo_t *cr,
gdouble shift)
{
cairo_pattern_t *source;
cairo_save (cr);
cairo_paint (cr);
source = cairo_pattern_reference (cairo_get_source (cr));
cairo_set_source_rgb (cr, shift, shift, shift);
cairo_set_operator (cr, CAIRO_OPERATOR_COLOR_DODGE);
cairo_mask (cr, source);
cairo_pattern_destroy (source);
cairo_restore (cr);
}
static GdkPixbuf *
scale_or_ref (GdkPixbuf *src,
gint width,
gint height)
{
if (width == gdk_pixbuf_get_width (src) &&
height == gdk_pixbuf_get_height (src))
return g_object_ref (src);
else
return gdk_pixbuf_scale_simple (src,
width, height,
GDK_INTERP_BILINEAR);
}
static GdkPixbuf *
gtk_do_render_icon_pixbuf (GtkStyleContext *context,
const GtkIconSource *source,
GtkIconSize size)
{
GdkPixbuf *scaled;
GdkPixbuf *stated;
GdkPixbuf *base_pixbuf;
gint width = 1;
gint height = 1;
cairo_t *cr;
cairo_surface_t *surface;
gboolean wildcarded;
GtkCssImageEffect image_effect;
G_GNUC_BEGIN_IGNORE_DEPRECATIONS;
base_pixbuf = gtk_icon_source_get_pixbuf (source);
G_GNUC_END_IGNORE_DEPRECATIONS;
g_return_val_if_fail (base_pixbuf != NULL, NULL);
if (size != (GtkIconSize) -1 &&
!gtk_icon_size_lookup (size, &width, &height))
{
g_warning (G_STRLOC ": invalid icon size '%d'", size);
return NULL;
}
/* If the size was wildcarded, and we're allowed to scale, then scale; otherwise,
* leave it alone.
*/
G_GNUC_BEGIN_IGNORE_DEPRECATIONS;
wildcarded = gtk_icon_source_get_size_wildcarded (source);
G_GNUC_END_IGNORE_DEPRECATIONS;
if (size != (GtkIconSize) -1 && wildcarded)
scaled = scale_or_ref (base_pixbuf, width, height);
else
scaled = g_object_ref (base_pixbuf);
/* If the state was wildcarded, then generate a state. */
G_GNUC_BEGIN_IGNORE_DEPRECATIONS;
wildcarded = gtk_icon_source_get_state_wildcarded (source);
G_GNUC_END_IGNORE_DEPRECATIONS;
if (!wildcarded)
return scaled;
image_effect = _gtk_css_image_effect_value_get
(_gtk_style_context_peek_property (context, GTK_CSS_PROPERTY_GTK_IMAGE_EFFECT));
switch (image_effect)
{
case GTK_CSS_IMAGE_EFFECT_DIM:
surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32,
gdk_pixbuf_get_width (scaled),
gdk_pixbuf_get_height (scaled));
cr = cairo_create (surface);
gdk_cairo_set_source_pixbuf (cr, scaled, 0, 0);
cairo_paint_with_alpha (cr, 0.5);
cairo_destroy (cr);
g_object_unref (scaled);
stated = gdk_pixbuf_get_from_surface (surface, 0, 0,
cairo_image_surface_get_width (surface),
cairo_image_surface_get_height (surface));
cairo_surface_destroy (surface);
break;
case GTK_CSS_IMAGE_EFFECT_HIGHLIGHT:
surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32,
gdk_pixbuf_get_width (scaled),
gdk_pixbuf_get_height (scaled));
cr = cairo_create (surface);
gdk_cairo_set_source_pixbuf (cr, scaled, 0, 0);
colorshift_source (cr, 0.10);
cairo_destroy (cr);
g_object_unref (scaled);
stated = gdk_pixbuf_get_from_surface (surface, 0, 0,
cairo_image_surface_get_width (surface),
cairo_image_surface_get_height (surface));
cairo_surface_destroy (surface);
break;
default:
g_warn_if_reached ();
/* fall through */
case GTK_CSS_IMAGE_EFFECT_NONE:
stated = scaled;
break;
}
return stated;
}
/**
* gtk_render_icon_pixbuf:
* @context: a #GtkStyleContext
* @source: the #GtkIconSource specifying the icon to render
* @size: (type int): the size to render the icon at. A size of (GtkIconSize) -1
* means render at the size of the source and don’t scale.
*
* Renders the icon specified by @source at the given @size, returning the result
* in a pixbuf.
*
* Returns: (transfer full): a newly-created #GdkPixbuf containing the rendered icon
*
* Since: 3.0
*
* Deprecated: 3.10: Use gtk_icon_theme_load_icon() instead.
**/
GdkPixbuf *
gtk_render_icon_pixbuf (GtkStyleContext *context,
const GtkIconSource *source,
GtkIconSize size)
{
g_return_val_if_fail (GTK_IS_STYLE_CONTEXT (context), NULL);
g_return_val_if_fail (size > GTK_ICON_SIZE_INVALID || size == (GtkIconSize)-1, NULL);
g_return_val_if_fail (source != NULL, NULL);
return gtk_do_render_icon_pixbuf (context, source, size);
}
/**
* gtk_render_icon:
* @context: a #GtkStyleContext
* @cr: a #cairo_t
* @pixbuf: a #GdkPixbuf containing the icon to draw
* @x: X position for the @pixbuf
* @y: Y position for the @pixbuf
*
* Renders the icon in @pixbuf at the specified @x and @y coordinates.
*
* Since: 3.2
**/
void
gtk_render_icon (GtkStyleContext *context,
cairo_t *cr,
GdkPixbuf *pixbuf,
gdouble x,
gdouble y)
{
cairo_surface_t *surface;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (cr != NULL);
cairo_save (cr);
cairo_new_path (cr);
surface = gdk_cairo_surface_create_from_pixbuf (pixbuf, 1, NULL);
gtk_css_style_render_icon_surface (gtk_style_context_lookup_style (context),
cr,
surface,
x, y);
cairo_surface_destroy (surface);
cairo_restore (cr);
}
/**
* gtk_render_icon_surface:
* @context: a #GtkStyleContext
* @cr: a #cairo_t
* @surface: a #cairo_surface_t containing the icon to draw
* @x: X position for the @icon
* @y: Y position for the @incon
*
* Renders the icon in @surface at the specified @x and @y coordinates.
*
* Since: 3.10
**/
void
gtk_render_icon_surface (GtkStyleContext *context,
cairo_t *cr,
cairo_surface_t *surface,
gdouble x,
gdouble y)
{
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (cr != NULL);
cairo_save (cr);
cairo_new_path (cr);
gtk_css_style_render_icon_surface (gtk_style_context_lookup_style (context),
cr,
surface,
x, y);
cairo_restore (cr);
}
/*
* gtk_render_content_path:
* @context: style context to get style information from
* @cr: cairo context to add path to
* @x: x coordinate of CSS box
* @y: y coordinate of CSS box
* @width: width of CSS box
* @height: height of CSS box
*
* Adds the path of the content box to @cr for a given border box.
* This function respects rounded corners.
*
* This is useful if you are drawing content that is supposed to
* fill the whole content area, like the color buttons in
* #GtkColorChooserDialog.
**/
void
gtk_render_content_path (GtkStyleContext *context,
cairo_t *cr,
double x,
double y,
double width,
double height)
{
GtkRoundedBox box;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (cr != NULL);
_gtk_rounded_box_init_rect (&box, x, y, width, height);
_gtk_rounded_box_apply_border_radius_for_style (&box, gtk_style_context_lookup_style (context), 0);
_gtk_rounded_box_shrink (&box,
_gtk_css_number_value_get (_gtk_style_context_peek_property (context, GTK_CSS_PROPERTY_BORDER_TOP_WIDTH), 100)
+ _gtk_css_number_value_get (_gtk_style_context_peek_property (context, GTK_CSS_PROPERTY_PADDING_TOP), 100),
_gtk_css_number_value_get (_gtk_style_context_peek_property (context, GTK_CSS_PROPERTY_BORDER_RIGHT_WIDTH), 100)
+ _gtk_css_number_value_get (_gtk_style_context_peek_property (context, GTK_CSS_PROPERTY_PADDING_RIGHT), 100),
_gtk_css_number_value_get (_gtk_style_context_peek_property (context, GTK_CSS_PROPERTY_BORDER_BOTTOM_WIDTH), 100)
+ _gtk_css_number_value_get (_gtk_style_context_peek_property (context, GTK_CSS_PROPERTY_PADDING_BOTTOM), 100),
_gtk_css_number_value_get (_gtk_style_context_peek_property (context, GTK_CSS_PROPERTY_BORDER_LEFT_WIDTH), 100)
+ _gtk_css_number_value_get (_gtk_style_context_peek_property (context, GTK_CSS_PROPERTY_PADDING_LEFT), 100));
_gtk_rounded_box_path (&box, cr);
}
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