pixman: add qemu_pixman_color()

Helper function to map qemu colors (32bit integer + matching PixelFormat)
into pixman_color_t.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

2 files changed, 13 insertions, 0 deletions

diff --git a/include/ui/qemu-pixman.h b/include/ui/qemu-pixman.h
index b032f529aa..b0f09b587f 100644
--- a/include/ui/qemu-pixman.h
+++ b/include/ui/qemu-pixman.h
@@ -43,4 +43,6 @@ pixman_image_t *qemu_pixman_mirror_create(pixman_format_code_t format,
                                           pixman_image_t *image);
 void qemu_pixman_image_unref(pixman_image_t *image);
 
+pixman_color_t qemu_pixman_color(PixelFormat *pf, uint32_t color);
+
 #endif /* QEMU_PIXMAN_H */
diff --git a/ui/qemu-pixman.c b/ui/qemu-pixman.c
index 6dcbe90546..be551e09ed 100644
--- a/ui/qemu-pixman.c
+++ b/ui/qemu-pixman.c
@@ -79,3 +79,14 @@ void qemu_pixman_image_unref(pixman_image_t *image)
     }
     pixman_image_unref(image);
 }
+
+pixman_color_t qemu_pixman_color(PixelFormat *pf, uint32_t color)
+{
+    pixman_color_t c;
+
+    c.red   = ((color & pf->rmask) >> pf->rshift) << (16 - pf->rbits);
+    c.green = ((color & pf->gmask) >> pf->gshift) << (16 - pf->gbits);
+    c.blue  = ((color & pf->bmask) >> pf->bshift) << (16 - pf->bbits);
+    c.alpha = ((color & pf->amask) >> pf->ashift) << (16 - pf->abits);
+    return c;
+}