console: add qemu_pixelformat_from_pixman

Function to convert pixman format codes to qemu PixelFormat.

[ Benjamin Herrenschmidt: fix BGRA+RGBA shifts ]

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
diff --git a/include/ui/qemu-pixman.h b/include/ui/qemu-pixman.h
index ba970f8..090a3e2 100644
--- a/include/ui/qemu-pixman.h
+++ b/include/ui/qemu-pixman.h
@@ -33,6 +33,7 @@
 
 /* -------------------------------------------------------------------- */
 
+PixelFormat qemu_pixelformat_from_pixman(pixman_format_code_t format);
 int qemu_pixman_get_type(int rshift, int gshift, int bshift);
 pixman_format_code_t qemu_pixman_get_format(PixelFormat *pf);