From 461d9b40529a5e8979965ab998e49e49704e842b Mon Sep 17 00:00:00 2001
From: Benjamin Otte <otte@redhat.com>
Date: Tue, 29 Aug 2023 18:04:28 +0200
Subject: [PATCH] gpu: Set scissor rect before clearing

The render area that restricts clearing on Vulkan needs to be respected
by the GL renderer, too.
---
 gsk/gpu/gskgpurenderpassop.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/gsk/gpu/gskgpurenderpassop.c b/gsk/gpu/gskgpurenderpassop.c
index 899b7c03b7..403e7b661b 100644
--- a/gsk/gpu/gskgpurenderpassop.c
+++ b/gsk/gpu/gskgpurenderpassop.c
@@ -172,6 +172,10 @@ gsk_gpu_render_pass_op_gl_command (GskGpuOp    *op,
               gsk_gpu_image_get_width (self->target),
               gsk_gpu_image_get_height (self->target));
 
+  if (target_flip_y)
+    glScissor (self->area.x, target_flip_y - self->area.y - self->area.height, self->area.width, self->area.height);
+  else
+    glScissor (self->area.x, self->area.y, self->area.width, self->area.height);
   glClearColor (0, 0, 0, 0);
   glClear (GL_COLOR_BUFFER_BIT);