[any2ppm] Choose a more appropriate format for the replay content

Actually select a format that matches the request content when replaying
the script to an image.

1 files changed, 14 insertions, 1 deletions

diff --git a/test/any2ppm.c b/test/any2ppm.c
index 31dd0eb4..f35891fb 100644
--- a/test/any2ppm.c
+++ b/test/any2ppm.c
@@ -240,7 +240,20 @@ _create_image (void *closure,
 	       //csi_object_t *dictionary)
 {
     cairo_surface_t **out = closure;
-    *out = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, width, height);
+    cairo_format_t format;
+    switch (content) {
+    case CAIRO_CONTENT_ALPHA:
+	format = CAIRO_FORMAT_A8;
+	break;
+    case CAIRO_CONTENT_COLOR:
+	format = CAIRO_FORMAT_RGB24;
+	break;
+    default:
+    case CAIRO_CONTENT_COLOR_ALPHA:
+	format = CAIRO_FORMAT_ARGB32;
+	break;
+    }
+    *out = cairo_image_surface_create (format, width, height);
     return cairo_surface_reference (*out);
 }