From: Benjamin Otte <otte@redhat.com>
Date: Sat, 25 Dec 2021 13:43:33 +0000 (+0100)
Subject: gles: GLES 2 doesn't have glDrawBuffers()
X-Git-Tag: archive/raspbian/4.6.5+ds-1+rpi1~1^2~19^2~5^2~15^2~2
X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=6a310b50690258eca29c0e291aa26c9d9c3c94d4;p=gtk4.git

gles: GLES 2 doesn't have glDrawBuffers()

So don't call it.
---

diff --git a/gdk/gdkglcontext.c b/gdk/gdkglcontext.c
index 042c30a41d..62b60f5ebc 100644
--- a/gdk/gdkglcontext.c
+++ b/gdk/gdkglcontext.c
@@ -580,8 +580,8 @@ gdk_gl_context_real_begin_frame (GdkDrawContext *draw_context,
   glViewport (0, 0, ww, wh);
 
 #ifdef HAVE_EGL
-  if (priv->egl_context)
-    glDrawBuffers (1, (GLenum[1]) { GL_BACK_LEFT });
+  if (priv->egl_context && gdk_gl_context_check_version (context, 0, 0, 3, 0))
+    glDrawBuffers (1, (GLenum[1]) { gdk_gl_context_get_use_es (context) ? GL_BACK : GL_BACK_LEFT });
 #endif
 }