forked from AuroraMiddleware/gtk
dc6e831524
The term "hdr" is so overloaded, we shouldn't use them anywhere, except from maybe describing all of this work in blog posts and other marketing materials. So do renames: * hdr => high_depth * request_hdr => prefers_high_depth This more accurately describes what is going on.
129 lines
4.2 KiB
C
129 lines
4.2 KiB
C
/* GDK - The GIMP Drawing Kit
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*
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* gdkcairocontext-x11.c: X11 specific Cairo wrappers
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*
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* Copyright © 2016 Benjamin Otte
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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 Library 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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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library 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 "gdkcairocontext-x11.h"
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#include "gdkprivate-x11.h"
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#include "gdkcairo.h"
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#include "gdksurfaceprivate.h"
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#include <X11/Xlib.h>
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G_DEFINE_TYPE (GdkX11CairoContext, gdk_x11_cairo_context, GDK_TYPE_CAIRO_CONTEXT)
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static cairo_surface_t *
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create_cairo_surface_for_surface (GdkSurface *surface)
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{
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GdkDisplay *display;
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cairo_surface_t *cairo_surface;
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Visual *visual;
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int scale;
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display = gdk_surface_get_display (surface);
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scale = gdk_surface_get_scale_factor (surface);
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visual = gdk_x11_display_get_window_visual (GDK_X11_DISPLAY (display));
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cairo_surface = cairo_xlib_surface_create (gdk_x11_display_get_xdisplay (display),
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GDK_SURFACE_XID (surface),
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visual,
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gdk_surface_get_width (surface) * scale,
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gdk_surface_get_height (surface) * scale);
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cairo_surface_set_device_scale (cairo_surface, scale, scale);
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return cairo_surface;
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}
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static void
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gdk_x11_cairo_context_begin_frame (GdkDrawContext *draw_context,
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gboolean prefers_high_depth,
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cairo_region_t *region)
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{
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GdkX11CairoContext *self = GDK_X11_CAIRO_CONTEXT (draw_context);
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GdkRectangle clip_box;
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GdkSurface *surface;
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double sx, sy;
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surface = gdk_draw_context_get_surface (draw_context);
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cairo_region_get_extents (region, &clip_box);
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self->window_surface = create_cairo_surface_for_surface (surface);
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self->paint_surface = gdk_surface_create_similar_surface (surface,
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cairo_surface_get_content (self->window_surface),
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MAX (clip_box.width, 1),
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MAX (clip_box.height, 1));
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sx = sy = 1;
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cairo_surface_get_device_scale (self->paint_surface, &sx, &sy);
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cairo_surface_set_device_offset (self->paint_surface, -clip_box.x*sx, -clip_box.y*sy);
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}
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static void
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gdk_x11_cairo_context_end_frame (GdkDrawContext *draw_context,
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cairo_region_t *painted)
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{
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GdkX11CairoContext *self = GDK_X11_CAIRO_CONTEXT (draw_context);
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cairo_t *cr;
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cr = cairo_create (self->window_surface);
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cairo_set_source_surface (cr, self->paint_surface, 0, 0);
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gdk_cairo_region (cr, painted);
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cairo_clip (cr);
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cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE);
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cairo_paint (cr);
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cairo_destroy (cr);
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cairo_surface_flush (self->window_surface);
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g_clear_pointer (&self->paint_surface, cairo_surface_destroy);
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g_clear_pointer (&self->window_surface, cairo_surface_destroy);
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}
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static cairo_t *
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gdk_x11_cairo_context_cairo_create (GdkCairoContext *context)
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{
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GdkX11CairoContext *self = GDK_X11_CAIRO_CONTEXT (context);
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return cairo_create (self->paint_surface);
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}
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static void
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gdk_x11_cairo_context_class_init (GdkX11CairoContextClass *klass)
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{
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GdkDrawContextClass *draw_context_class = GDK_DRAW_CONTEXT_CLASS (klass);
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GdkCairoContextClass *cairo_context_class = GDK_CAIRO_CONTEXT_CLASS (klass);
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draw_context_class->begin_frame = gdk_x11_cairo_context_begin_frame;
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draw_context_class->end_frame = gdk_x11_cairo_context_end_frame;
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cairo_context_class->cairo_create = gdk_x11_cairo_context_cairo_create;
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}
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static void
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gdk_x11_cairo_context_init (GdkX11CairoContext *self)
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{
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}
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