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gdkwindow: Respect cairo surfaces with device scale

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If a cairo_surface for a window has a device scale set we need
to respect this when creating a similar window. I.e. we want
to then automatically create a larger window which inherits
the scale from the original.

We also need to calculate a different device_offset if there
is a device_scale set.
This commit is contained in:
Alexander Larsson 2013-06-04 10:41:44 +02:00
parent 1b1f2b4b52
commit 56bec0c70c
1 changed files with 19 additions and 2 deletions
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21
gdk/gdkwindow.c
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@ -2757,6 +2757,7 @@ gdk_window_begin_paint_region (GdkWindow *window,
GdkWindowImplClass *impl_class;
GdkWindowPaint *paint;
GSList *list;
double sx, sy;
gboolean needs_surface;
g_return_if_fail (GDK_IS_WINDOW (window));
@ -2783,7 +2784,11 @@ gdk_window_begin_paint_region (GdkWindow *window,
gdk_window_get_content (window),
MAX (clip_box.width, 1),
MAX (clip_box.height, 1));
cairo_surface_set_device_offset (paint->surface, -clip_box.x, -clip_box.y);
sx = sy = 1;
#ifdef HAVE_CAIRO_SURFACE_SET_DEVICE_SCALE
cairo_surface_get_device_scale (paint->surface, &sx, &sy);
#endif
cairo_surface_set_device_offset (paint->surface, -clip_box.x*sx, -clip_box.y*sy);
}
for (list = window->paint_stack; list != NULL; list = list->next)
@ -9198,10 +9203,18 @@ gdk_window_create_similar_surface (GdkWindow * window,
int height)
{
cairo_surface_t *window_surface, *surface;
double sx, sy;
g_return_val_if_fail (GDK_IS_WINDOW (window), NULL);
window_surface = gdk_window_ref_impl_surface (window);
sx = sy = 1;
#ifdef HAVE_CAIRO_SURFACE_SET_DEVICE_SCALE
cairo_surface_get_device_scale (window_surface, &sx, &sy);
#endif
width = width * sx;
height = height * sy;
switch (_gdk_rendering_mode)
{
@ -9224,6 +9237,10 @@ gdk_window_create_similar_surface (GdkWindow * window,
break;
}
#ifdef HAVE_CAIRO_SURFACE_SET_DEVICE_SCALE
cairo_surface_set_device_scale (surface, sx, sy);
#endif
cairo_surface_destroy (window_surface);
return surface;