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gtk-demo: Blit backing pixmap using Cairo

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This commit is contained in:
Benjamin Otte 2010-07-19 12:15:58 +02:00
parent 831afa2159
commit 188884a9b1
1 changed files with 8 additions and 13 deletions
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21
demos/gtk-demo/drawingarea.c
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@ -53,18 +53,15 @@ scribble_expose_event (GtkWidget *widget,
GdkEventExpose *event, GdkEventExpose *event,
gpointer data) gpointer data)
{ {
/* We use the "foreground GC" for the widget since it already exists, cairo_t *cr;
* but honestly any GC would work. The only thing to worry about
* is whether the GC has an inappropriate clip region set.
*/
gdk_draw_drawable (widget->window, cr = gdk_cairo_create (widget->window);
widget->style->fg_gc[gtk_widget_get_state (widget)],
pixmap, gdk_cairo_set_source_pixmap (cr, pixmap, 0, 0);
/* Only copy the area that was exposed. */ gdk_cairo_rectangle (cr, &event->area);
event->area.x, event->area.y, cairo_fill (cr);
event->area.x, event->area.y,
event->area.width, event->area.height); cairo_destroy (cr);
return FALSE; return FALSE;
} }
@ -172,8 +169,6 @@ checkerboard_expose (GtkWidget *da,
ycount = xcount % 2; /* start with even/odd depending on row */ ycount = xcount % 2; /* start with even/odd depending on row */
while (j < da->allocation.height) while (j < da->allocation.height)
{ {
GdkGC *gc;
if (ycount % 2) if (ycount % 2)
cairo_set_source_rgb (cr, 0.45777, 0, 0.45777); cairo_set_source_rgb (cr, 0.45777, 0, 0.45777);
else else