forked from AuroraMiddleware/gtk
651 lines
18 KiB
C
651 lines
18 KiB
C
/* GTK - The GIMP Toolkit
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* Copyright (C) 2010 Carlos Garnacho <carlosg@gnome.org>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "config.h"
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#include "gtkrender.h"
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#include <math.h>
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#include "gtkcsscornervalueprivate.h"
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#include "gtkcssimagebuiltinprivate.h"
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#include "gtkcssimagevalueprivate.h"
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#include "gtkcssnumbervalueprivate.h"
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#include "gtkcssrgbavalueprivate.h"
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#include "gtkcssshadowsvalueprivate.h"
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#include "gtkcsstransformvalueprivate.h"
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#include "gtkhslaprivate.h"
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#include "gtkrendericonprivate.h"
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#include "gtkstylecontextprivate.h"
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#include "gsk/gskroundedrectprivate.h"
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#include <gdk/gdktextureprivate.h>
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#include "fallback-c89.c"
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static void
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gtk_do_render_icon (GtkStyleContext *context,
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cairo_t *cr,
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GtkCssImageBuiltinType image_type,
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gdouble x,
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gdouble y,
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gdouble width,
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gdouble height)
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{
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GtkSnapshot *snapshot;
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GskRenderNode *node;
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snapshot = gtk_snapshot_new ();
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gtk_css_style_snapshot_icon (gtk_style_context_lookup_style (context), snapshot, width, height, image_type);
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node = gtk_snapshot_free_to_node (snapshot);
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if (node == NULL)
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return;
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cairo_save (cr);
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cairo_translate (cr, x, y);
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gsk_render_node_draw (node, cr);
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cairo_restore (cr);
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gsk_render_node_unref (node);
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}
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/**
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* gtk_render_check:
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* @context: a #GtkStyleContext
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* @cr: a #cairo_t
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* @x: X origin of the rectangle
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* @y: Y origin of the rectangle
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* @width: rectangle width
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* @height: rectangle height
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*
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* Renders a checkmark (as in a #GtkCheckButton).
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*
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* The %GTK_STATE_FLAG_CHECKED state determines whether the check is
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* on or off, and %GTK_STATE_FLAG_INCONSISTENT determines whether it
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* should be marked as undefined.
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*
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* Typical checkmark rendering:
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*
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* 
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**/
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void
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gtk_render_check (GtkStyleContext *context,
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cairo_t *cr,
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gdouble x,
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gdouble y,
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gdouble width,
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gdouble height)
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{
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GtkStateFlags state;
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GtkCssImageBuiltinType image_type;
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g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
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g_return_if_fail (cr != NULL);
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if (width <= 0 || height <= 0)
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return;
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state = gtk_style_context_get_state (context);
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if (state & GTK_STATE_FLAG_INCONSISTENT)
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image_type = GTK_CSS_IMAGE_BUILTIN_CHECK_INCONSISTENT;
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else if (state & GTK_STATE_FLAG_CHECKED)
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image_type = GTK_CSS_IMAGE_BUILTIN_CHECK;
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else
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image_type = GTK_CSS_IMAGE_BUILTIN_NONE;
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gtk_do_render_icon (context, cr, image_type, x, y, width, height);
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}
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/**
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* gtk_render_option:
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* @context: a #GtkStyleContext
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* @cr: a #cairo_t
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* @x: X origin of the rectangle
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* @y: Y origin of the rectangle
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* @width: rectangle width
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* @height: rectangle height
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*
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* Renders an option mark (as in a #GtkRadioButton), the %GTK_STATE_FLAG_CHECKED
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* state will determine whether the option is on or off, and
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* %GTK_STATE_FLAG_INCONSISTENT whether it should be marked as undefined.
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*
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* Typical option mark rendering:
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*
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* 
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**/
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void
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gtk_render_option (GtkStyleContext *context,
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cairo_t *cr,
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gdouble x,
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gdouble y,
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gdouble width,
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gdouble height)
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{
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GtkStateFlags state;
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GtkCssImageBuiltinType image_type;
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g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
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g_return_if_fail (cr != NULL);
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if (width <= 0 || height <= 0)
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return;
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state = gtk_style_context_get_state (context);
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if (state & GTK_STATE_FLAG_INCONSISTENT)
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image_type = GTK_CSS_IMAGE_BUILTIN_OPTION_INCONSISTENT;
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else if (state & GTK_STATE_FLAG_CHECKED)
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image_type = GTK_CSS_IMAGE_BUILTIN_OPTION;
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else
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image_type = GTK_CSS_IMAGE_BUILTIN_NONE;
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gtk_do_render_icon (context, cr, image_type, x, y, width, height);
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}
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/**
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* gtk_render_arrow:
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* @context: a #GtkStyleContext
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* @cr: a #cairo_t
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* @angle: arrow angle from 0 to 2 * %G_PI, being 0 the arrow pointing to the north
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* @x: X origin of the render area
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* @y: Y origin of the render area
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* @size: square side for render area
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*
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* Renders an arrow pointing to @angle.
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*
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* Typical arrow rendering at 0, 1⁄2 π;, π; and 3⁄2 π:
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*
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* 
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**/
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void
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gtk_render_arrow (GtkStyleContext *context,
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cairo_t *cr,
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gdouble angle,
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gdouble x,
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gdouble y,
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gdouble size)
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{
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GtkCssImageBuiltinType image_type;
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g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
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g_return_if_fail (cr != NULL);
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if (size <= 0)
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return;
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/* map [0, 2 * pi) to [0, 4) */
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angle = round (2 * angle / G_PI);
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switch (((int) angle) & 3)
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{
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case 0:
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image_type = GTK_CSS_IMAGE_BUILTIN_ARROW_UP;
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break;
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case 1:
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image_type = GTK_CSS_IMAGE_BUILTIN_ARROW_RIGHT;
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break;
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case 2:
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image_type = GTK_CSS_IMAGE_BUILTIN_ARROW_DOWN;
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break;
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case 3:
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image_type = GTK_CSS_IMAGE_BUILTIN_ARROW_LEFT;
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break;
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default:
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g_assert_not_reached ();
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image_type = GTK_CSS_IMAGE_BUILTIN_ARROW_UP;
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break;
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}
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gtk_do_render_icon (context, cr, image_type, x, y, size, size);
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}
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/**
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* gtk_render_background:
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* @context: a #GtkStyleContext
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* @cr: a #cairo_t
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* @x: X origin of the rectangle
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* @y: Y origin of the rectangle
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* @width: rectangle width
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* @height: rectangle height
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*
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* Renders the background of an element.
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*
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* Typical background rendering, showing the effect of
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* `background-image`, `border-width` and `border-radius`:
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*
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* 
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**/
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void
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gtk_render_background (GtkStyleContext *context,
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cairo_t *cr,
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gdouble x,
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gdouble y,
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gdouble width,
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gdouble height)
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{
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GtkSnapshot *snapshot;
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GskRenderNode *node;
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g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
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g_return_if_fail (cr != NULL);
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if (width <= 0 || height <= 0)
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return;
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snapshot = gtk_snapshot_new ();
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gtk_snapshot_render_background (snapshot, context, x, y, width, height);
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node = gtk_snapshot_free_to_node (snapshot);
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if (node == NULL)
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return;
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cairo_save (cr);
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gsk_render_node_draw (node, cr);
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cairo_restore (cr);
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gsk_render_node_unref (node);
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}
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/**
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* gtk_render_background_get_clip:
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* @context: a #GtkStyleContext
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* @x: X origin of the rectangle
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* @y: Y origin of the rectangle
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* @width: rectangle width
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* @height: rectangle height
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* @out_clip: (out): return location for the clip
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*
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* Returns the area that will be affected (i.e. drawn to) when
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* calling gtk_render_background() for the given @context and
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* rectangle.
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*/
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void
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gtk_render_background_get_clip (GtkStyleContext *context,
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gdouble x,
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gdouble y,
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gdouble width,
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gdouble height,
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GdkRectangle *out_clip)
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{
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GtkBorder shadow;
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_gtk_css_shadows_value_get_extents (_gtk_style_context_peek_property (context, GTK_CSS_PROPERTY_BOX_SHADOW), &shadow);
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out_clip->x = floor (x) - shadow.left;
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out_clip->y = floor (y) - shadow.top;
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out_clip->width = ceil (width) + shadow.left + shadow.right;
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out_clip->height = ceil (height) + shadow.top + shadow.bottom;
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}
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/**
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* gtk_render_frame:
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* @context: a #GtkStyleContext
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* @cr: a #cairo_t
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* @x: X origin of the rectangle
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* @y: Y origin of the rectangle
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* @width: rectangle width
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* @height: rectangle height
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*
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* Renders a frame around the rectangle defined by @x, @y, @width, @height.
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*
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* Examples of frame rendering, showing the effect of `border-image`,
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* `border-color`, `border-width`, `border-radius` and junctions:
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*
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* 
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**/
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void
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gtk_render_frame (GtkStyleContext *context,
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cairo_t *cr,
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gdouble x,
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gdouble y,
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gdouble width,
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gdouble height)
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{
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GtkSnapshot *snapshot;
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GskRenderNode *node;
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g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
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g_return_if_fail (cr != NULL);
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if (width <= 0 || height <= 0)
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return;
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snapshot = gtk_snapshot_new ();
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gtk_snapshot_render_frame (snapshot, context, x, y, width, height);
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node = gtk_snapshot_free_to_node (snapshot);
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if (node == NULL)
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return;
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cairo_save (cr);
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gsk_render_node_draw (node, cr);
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cairo_restore (cr);
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gsk_render_node_unref (node);
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}
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/**
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* gtk_render_expander:
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* @context: a #GtkStyleContext
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* @cr: a #cairo_t
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* @x: X origin of the rectangle
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* @y: Y origin of the rectangle
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* @width: rectangle width
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* @height: rectangle height
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*
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* Renders an expander (as used in #GtkTreeView and #GtkExpander) in the area
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* defined by @x, @y, @width, @height. The state %GTK_STATE_FLAG_CHECKED
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* determines whether the expander is collapsed or expanded.
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*
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* Typical expander rendering:
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*
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* 
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**/
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void
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gtk_render_expander (GtkStyleContext *context,
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cairo_t *cr,
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gdouble x,
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gdouble y,
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gdouble width,
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gdouble height)
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{
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GtkCssImageBuiltinType image_type;
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GtkStateFlags state;
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g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
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g_return_if_fail (cr != NULL);
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if (width <= 0 || height <= 0)
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return;
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state = gtk_style_context_get_state (context);
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if (gtk_style_context_has_class (context, "horizontal"))
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{
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if (state & GTK_STATE_FLAG_DIR_RTL)
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image_type = (state & GTK_STATE_FLAG_CHECKED)
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? GTK_CSS_IMAGE_BUILTIN_EXPANDER_HORIZONTAL_RIGHT_EXPANDED
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: GTK_CSS_IMAGE_BUILTIN_EXPANDER_HORIZONTAL_RIGHT;
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else
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image_type = (state & GTK_STATE_FLAG_CHECKED)
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? GTK_CSS_IMAGE_BUILTIN_EXPANDER_HORIZONTAL_LEFT_EXPANDED
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: GTK_CSS_IMAGE_BUILTIN_EXPANDER_HORIZONTAL_LEFT;
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}
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else
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{
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if (state & GTK_STATE_FLAG_DIR_RTL)
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image_type = (state & GTK_STATE_FLAG_CHECKED)
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? GTK_CSS_IMAGE_BUILTIN_EXPANDER_VERTICAL_RIGHT_EXPANDED
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: GTK_CSS_IMAGE_BUILTIN_EXPANDER_VERTICAL_RIGHT;
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else
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image_type = (state & GTK_STATE_FLAG_CHECKED)
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? GTK_CSS_IMAGE_BUILTIN_EXPANDER_VERTICAL_LEFT_EXPANDED
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: GTK_CSS_IMAGE_BUILTIN_EXPANDER_VERTICAL_LEFT;
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}
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gtk_do_render_icon (context, cr, image_type, x, y, width, height);
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}
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/**
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* gtk_render_focus:
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* @context: a #GtkStyleContext
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* @cr: a #cairo_t
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* @x: X origin of the rectangle
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* @y: Y origin of the rectangle
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* @width: rectangle width
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* @height: rectangle height
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*
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* Renders a focus indicator on the rectangle determined by @x, @y, @width, @height.
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*
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* Typical focus rendering:
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*
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* 
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**/
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void
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gtk_render_focus (GtkStyleContext *context,
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cairo_t *cr,
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gdouble x,
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gdouble y,
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gdouble width,
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gdouble height)
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{
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GtkSnapshot *snapshot;
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GskRenderNode *node;
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g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
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g_return_if_fail (cr != NULL);
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if (width <= 0 || height <= 0)
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return;
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snapshot = gtk_snapshot_new ();
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gtk_snapshot_render_frame (snapshot, context, x, y, width, height);
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node = gtk_snapshot_free_to_node (snapshot);
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if (node == NULL)
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return;
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cairo_save (cr);
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gsk_render_node_draw (node, cr);
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cairo_restore (cr);
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gsk_render_node_unref (node);
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}
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/**
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* gtk_render_layout:
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* @context: a #GtkStyleContext
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* @cr: a #cairo_t
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* @x: X origin
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* @y: Y origin
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* @layout: the #PangoLayout to render
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*
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* Renders @layout on the coordinates @x, @y
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**/
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void
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gtk_render_layout (GtkStyleContext *context,
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cairo_t *cr,
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gdouble x,
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gdouble y,
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PangoLayout *layout)
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{
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GtkSnapshot *snapshot;
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GskRenderNode *node;
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g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
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g_return_if_fail (PANGO_IS_LAYOUT (layout));
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g_return_if_fail (cr != NULL);
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snapshot = gtk_snapshot_new ();
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gtk_snapshot_render_layout (snapshot, context, x, y, layout);
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node = gtk_snapshot_free_to_node (snapshot);
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if (node == NULL)
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return;
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cairo_save (cr);
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gsk_render_node_draw (node, cr);
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cairo_restore (cr);
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gsk_render_node_unref (node);
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}
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static void
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gtk_do_render_line (GtkStyleContext *context,
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cairo_t *cr,
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gdouble x0,
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gdouble y0,
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gdouble x1,
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gdouble y1)
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{
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const GdkRGBA *color;
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cairo_save (cr);
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color = _gtk_css_rgba_value_get_rgba (_gtk_style_context_peek_property (context, GTK_CSS_PROPERTY_COLOR));
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cairo_set_line_cap (cr, CAIRO_LINE_CAP_SQUARE);
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cairo_set_line_width (cr, 1);
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cairo_move_to (cr, x0 + 0.5, y0 + 0.5);
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cairo_line_to (cr, x1 + 0.5, y1 + 0.5);
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gdk_cairo_set_source_rgba (cr, color);
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cairo_stroke (cr);
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cairo_restore (cr);
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}
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/**
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* gtk_render_line:
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* @context: a #GtkStyleContext
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* @cr: a #cairo_t
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* @x0: X coordinate for the origin of the line
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* @y0: Y coordinate for the origin of the line
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* @x1: X coordinate for the end of the line
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* @y1: Y coordinate for the end of the line
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*
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* Renders a line from (x0, y0) to (x1, y1).
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**/
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void
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gtk_render_line (GtkStyleContext *context,
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cairo_t *cr,
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gdouble x0,
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gdouble y0,
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gdouble x1,
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gdouble y1)
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{
|
||
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
|
||
g_return_if_fail (cr != NULL);
|
||
|
||
gtk_do_render_line (context, cr, x0, y0, x1, y1);
|
||
}
|
||
|
||
/**
|
||
* 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 #GtkPaned and
|
||
* #GtkWindow’s resize grip), in the rectangle
|
||
* determined by @x, @y, @width, @height.
|
||
*
|
||
* Handles rendered for the paned and grip classes:
|
||
*
|
||
* 
|
||
**/
|
||
void
|
||
gtk_render_handle (GtkStyleContext *context,
|
||
cairo_t *cr,
|
||
gdouble x,
|
||
gdouble y,
|
||
gdouble width,
|
||
gdouble height)
|
||
{
|
||
GtkCssImageBuiltinType type;
|
||
|
||
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
|
||
g_return_if_fail (cr != NULL);
|
||
|
||
if (width <= 0 || height <= 0)
|
||
return;
|
||
|
||
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_PANE_SEPARATOR))
|
||
{
|
||
type = GTK_CSS_IMAGE_BUILTIN_PANE_SEPARATOR;
|
||
}
|
||
else
|
||
{
|
||
type = GTK_CSS_IMAGE_BUILTIN_HANDLE;
|
||
}
|
||
|
||
gtk_do_render_icon (context, cr, x, y, width, height, type);
|
||
}
|
||
|
||
/**
|
||
* 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.
|
||
**/
|
||
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;
|
||
|
||
gtk_do_render_icon (context, cr, x, y, width, height, GTK_CSS_IMAGE_BUILTIN_SPINNER);
|
||
}
|
||
|
||
/**
|
||
* gtk_render_icon:
|
||
* @context: a #GtkStyleContext
|
||
* @cr: a #cairo_t
|
||
* @texture: a #GdkTexture containing the icon to draw
|
||
* @x: X position for the @texture
|
||
* @y: Y position for the @texture
|
||
*
|
||
* Renders the icon in @texture at the specified @x and @y coordinates.
|
||
*
|
||
* This function will render the icon in @texture at exactly its size,
|
||
* regardless of scaling factors, which may not be appropriate when
|
||
* drawing on displays with high pixel densities.
|
||
*
|
||
**/
|
||
void
|
||
gtk_render_icon (GtkStyleContext *context,
|
||
cairo_t *cr,
|
||
GdkTexture *texture,
|
||
gdouble x,
|
||
gdouble y)
|
||
{
|
||
GtkSnapshot *snapshot;
|
||
GskRenderNode *node;
|
||
|
||
snapshot = gtk_snapshot_new ();
|
||
gtk_css_style_snapshot_icon_paintable (gtk_style_context_lookup_style (context),
|
||
snapshot,
|
||
GDK_PAINTABLE (texture),
|
||
gdk_texture_get_width (texture),
|
||
gdk_texture_get_height (texture),
|
||
FALSE);
|
||
node = gtk_snapshot_free_to_node (snapshot);
|
||
if (node == NULL)
|
||
return;
|
||
|
||
cairo_save (cr);
|
||
cairo_translate (cr, x, y);
|
||
gsk_render_node_draw (node, cr);
|
||
cairo_restore (cr);
|
||
}
|