[gtk/wip/chergert/glproto: 341/526] only reset changed textures

[Christian Hergert <chergert src gnome org>]

commit a3914550d6bd23d08788344de779822e8498421a
Author: Christian Hergert <chergert redhat com>
Date:   Wed Jan 27 21:50:39 2021 -0800

    only reset changed textures

 gsk/next/gskglcommandqueue.c | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)
---
diff --git a/gsk/next/gskglcommandqueue.c b/gsk/next/gskglcommandqueue.c
index 8ac3c97522..1f27ee8d08 100644
--- a/gsk/next/gskglcommandqueue.c
+++ b/gsk/next/gskglcommandqueue.c
@@ -914,9 +914,15 @@ gsk_gl_command_queue_end_frame (GskGLCommandQueue *self)
    */
   for (guint i = 0; i < G_N_ELEMENTS (self->attachments->textures); i++)
     {
-      glActiveTexture (GL_TEXTURE0 + i);
-      glBindTexture (GL_TEXTURE_2D, 0);
-      self->attachments->textures[i].id = 0;
+      if (self->attachments->textures[i].id != 0)
+        {
+          glActiveTexture (GL_TEXTURE0 + i);
+          glBindTexture (GL_TEXTURE_2D, 0);
+
+          self->attachments->textures[i].id = 0;
+          self->attachments->textures[i].changed = FALSE;
+          self->attachments->textures[i].initial = TRUE;
+        }
     }
 
   g_string_chunk_clear (self->debug_groups);