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diff --git a/gfx/cairo/cairo/src/cairo-win32-surface.c b/gfx/cairo/cairo/src/cairo-win32-surface.c
--- a/gfx/cairo/cairo/src/cairo-win32-surface.c
+++ b/gfx/cairo/cairo/src/cairo-win32-surface.c
@@ -1709,40 +1709,23 @@ _cairo_win32_surface_show_glyphs (void
}
#else
return CAIRO_INT_STATUS_UNSUPPORTED;
#endif
}
#undef STACK_GLYPH_SIZE
-/**
- * cairo_win32_surface_create:
- * @hdc: the DC to create a surface for
- *
- * Creates a cairo surface that targets the given DC. The DC will be
- * queried for its initial clip extents, and this will be used as the
- * size of the cairo surface. The resulting surface will always be of
- * format %CAIRO_FORMAT_RGB24; should you need another surface format,
- * you will need to create one through
- * cairo_win32_surface_create_with_dib().
- *
- * Return value: the newly created surface
- **/
-cairo_surface_t *
-cairo_win32_surface_create (HDC hdc)
+static cairo_surface_t *
+cairo_win32_surface_create_internal (HDC hdc, cairo_format_t format)
{
cairo_win32_surface_t *surface;
- cairo_format_t format;
RECT rect;
- /* Assume that everything coming in as a HDC is RGB24 */
- format = CAIRO_FORMAT_RGB24;
-
surface = malloc (sizeof (cairo_win32_surface_t));
if (surface == NULL)
return _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_NO_MEMORY));
if (_cairo_win32_save_initial_clip (hdc, surface) != CAIRO_STATUS_SUCCESS) {
free (surface);
return _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_NO_MEMORY));
}
@@ -1765,17 +1748,58 @@ cairo_win32_surface_create (HDC hdc)
surface->extents.width = rect.right - rect.left;
surface->extents.height = rect.bottom - rect.top;
surface->flags = _cairo_win32_flags_for_dc (surface->dc);
_cairo_surface_init (&surface->base, &cairo_win32_surface_backend,
_cairo_content_from_format (format));
- return (cairo_surface_t *)surface;
+ return &surface->base;
+}
+
+/**
+ * cairo_win32_surface_create:
+ * @hdc: the DC to create a surface for
+ *
+ * Creates a cairo surface that targets the given DC. The DC will be
+ * queried for its initial clip extents, and this will be used as the
+ * size of the cairo surface. The resulting surface will always be of
+ * format %CAIRO_FORMAT_RGB24; should you need another surface format,
+ * you will need to create one through
+ * cairo_win32_surface_create_with_dib() or call
+ * cairo_win32_surface_create_with_alpha.
+ *
+ * Return value: the newly created surface
+ **/
+cairo_surface_t *
+cairo_win32_surface_create (HDC hdc)
+{
+ /* Assume everything comes in as RGB24 */
+ return cairo_win32_surface_create_internal(hdc, CAIRO_FORMAT_RGB24);
+}
+
+/**
+ * cairo_win32_surface_create_with_alpha:
+ * @hdc: the DC to create a surface for
+ *
+ * Creates a cairo surface that targets the given DC. The DC will be
+ * queried for its initial clip extents, and this will be used as the
+ * size of the cairo surface. The resulting surface will always be of
+ * format %CAIRO_FORMAT_ARGB32; this format is used when drawing into
+ * transparent windows.
+ *
+ * Return value: the newly created surface
+ *
+ * Since: 1.10
+ **/
+cairo_surface_t *
+cairo_win32_surface_create_with_alpha (HDC hdc)
+{
+ return cairo_win32_surface_create_internal(hdc, CAIRO_FORMAT_ARGB32);
}
/**
* cairo_win32_surface_create_with_dib:
* @format: format of pixels in the surface to create
* @width: width of the surface, in pixels
* @height: height of the surface, in pixels
*
diff --git a/gfx/cairo/cairo/src/cairo-win32.h b/gfx/cairo/cairo/src/cairo-win32.h
--- a/gfx/cairo/cairo/src/cairo-win32.h
+++ b/gfx/cairo/cairo/src/cairo-win32.h
@@ -44,16 +44,19 @@
#include <windows.h>
CAIRO_BEGIN_DECLS
cairo_public cairo_surface_t *
cairo_win32_surface_create (HDC hdc);
cairo_public cairo_surface_t *
+cairo_win32_surface_create_with_alpha (HDC hdc);
+
+cairo_public cairo_surface_t *
cairo_win32_printing_surface_create (HDC hdc);
cairo_public cairo_surface_t *
cairo_win32_surface_create_with_ddb (HDC hdc,
cairo_format_t format,
int width,
int height);
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