1 files changed, 129 insertions, 0 deletions
diff --git a/gfx/cairo/win32-transparent-surface.patch b/gfx/cairo/win32-transparent-surface.patch
new file mode 100644
index 000000000..c8765cf28
--- /dev/null
+++ b/gfx/cairo/win32-transparent-surface.patch
@@ -0,0 +1,129 @@
+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);
+