[gtk/wip/baedert/for-master] gl renderer: don't pretend all transform nodes support being transformed

[Timm Bäder <baedert src gnome org>]

commit a385a7b2a533b2da6d6b1bb524b0cd89eb38f03e
Author: Timm Bäder <mail baedert org>
Date:   Fri May 22 19:50:29 2020 +0200

    gl renderer: don't pretend all transform nodes support being transformed
    
    It doesn't work in the general case. The transform handling could use a
    general overhaul though.
    
    Fixes #2773

 gsk/gl/gskglrenderer.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)
---
diff --git a/gsk/gl/gskglrenderer.c b/gsk/gl/gskglrenderer.c
index 9780c51d55..592796287f 100644
--- a/gsk/gl/gskglrenderer.c
+++ b/gsk/gl/gskglrenderer.c
@@ -273,13 +273,15 @@ node_supports_transform (GskRenderNode *node)
       case GSK_OPACITY_NODE:
       case GSK_COLOR_MATRIX_NODE:
       case GSK_TEXTURE_NODE:
-      case GSK_TRANSFORM_NODE:
       case GSK_CROSS_FADE_NODE:
       case GSK_LINEAR_GRADIENT_NODE:
       case GSK_DEBUG_NODE:
       case GSK_TEXT_NODE:
         return TRUE;
 
+      case GSK_TRANSFORM_NODE:
+        return node_supports_transform (gsk_transform_node_get_child (node));
+
       default:
         return FALSE;
     }