diff options
| -rw-r--r-- | src/win32/cairo-win32-display-surface.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/src/win32/cairo-win32-display-surface.c b/src/win32/cairo-win32-display-surface.c index b0c2f903..ccd285d7 100644 --- a/src/win32/cairo-win32-display-surface.c +++ b/src/win32/cairo-win32-display-surface.c @@ -392,6 +392,7 @@ _cairo_win32_display_surface_create_similar_image (void *abstract_other, int height) { cairo_win32_display_surface_t *surface = abstract_other; + cairo_image_surface_t *image; surface = (cairo_win32_display_surface_t *) _cairo_win32_display_surface_create_for_dc (surface->win32.dc, @@ -399,7 +400,14 @@ _cairo_win32_display_surface_create_similar_image (void *abstract_other, if (surface->win32.base.status) return &surface->win32.base; - return surface->image; + /* And clear in order to comply with our user API semantics */ + image = (cairo_image_surface_t *) surface->image; + if (! image->base.is_clear) { + memset (image->data, 0, image->stride * height); + image->base.is_clear = TRUE; + } + + return &image->base; } static cairo_status_t |