From 9a0129a0e4c99a618d775108622b8f19cd381a9d Mon Sep 17 00:00:00 2001
From: Matthew Waters <ystreet00@gmail.com>
Date: Fri, 23 May 2014 10:59:05 +1000
Subject: [PATCH] gl/memory: RGBA/UNSIGNED_BYTE only format supported by
 ReadPixels GLES2

Error out in case we attempt to read with any other invalid format.
---
 gst-libs/gst/gl/gstglmemory.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/gst-libs/gst/gl/gstglmemory.c b/gst-libs/gst/gl/gstglmemory.c
index fedd28f8e8..a5c60d7405 100644
--- a/gst-libs/gst/gl/gstglmemory.c
+++ b/gst-libs/gst/gl/gstglmemory.c
@@ -758,6 +758,14 @@ _gl_mem_copy_thread (GstGLContext * context, gpointer data)
       goto fbo_error;
     }
 
+    if (gst_gl_context_get_gl_api (context) & GST_GL_API_GLES2
+        && (in_gl_format != GL_RGBA || in_gl_type != GL_UNSIGNED_BYTE)) {
+      gst_gl_context_set_error (context, "Cannot copy non RGBA/UNSIGNED_BYTE "
+          "textures on GLES2");
+      gl->BindTexture (GL_TEXTURE_2D, 0);
+      goto fbo_error;
+    }
+
     if (!src->pbo)
       gl->GenBuffers (1, &src->pbo);