[gtk/wip/chergert/glproto] use single glDeleteTextures() call when freeing pool

[Christian Hergert <chergert src gnome org>]

commit 5fdd7dcf058228bb0e91173f3261c6b0808ca205
Author: Christian Hergert <chergert redhat com>
Date:   Mon Feb 8 14:04:12 2021 -0800

    use single glDeleteTextures() call when freeing pool

 gsk/next/gskgltexturepool.c | 9 +++++++++
 1 file changed, 9 insertions(+)
---
diff --git a/gsk/next/gskgltexturepool.c b/gsk/next/gskgltexturepool.c
index 198cb963c8..6c8b26669b 100644
--- a/gsk/next/gskgltexturepool.c
+++ b/gsk/next/gskgltexturepool.c
@@ -68,6 +68,9 @@ gsk_gl_texture_pool_init (GskGLTexturePool *self)
 void
 gsk_gl_texture_pool_clear (GskGLTexturePool *self)
 {
+  guint *texture_ids = g_newa (guint, self->by_width.length);
+  guint i = 0;
+
   while (self->by_width.length > 0)
     {
       GskGLTexture *head = g_queue_peek_head (&self->by_width);
@@ -75,11 +78,17 @@ gsk_gl_texture_pool_clear (GskGLTexturePool *self)
       g_queue_unlink (&self->by_width, &head->width_link);
       g_queue_unlink (&self->by_height, &head->height_link);
 
+      texture_ids[i++] = head->texture_id;
+      head->texture_id = 0;
+
       gsk_gl_texture_free (head);
     }
 
   g_assert (self->by_width.length == 0);
   g_assert (self->by_height.length == 0);
+
+  if (i > 0)
+    glDeleteTextures (i, texture_ids);
 }
 
 void