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0494e70955
The GLES2 spec only guarantees calling glReadPixels with GL_RGBA and an implementation specific format. Mesa seems to now reject reading with GL_RGB so the test had started failing. This fixes it to just read using GL_RGBA. Reviewed-by: Robert Bragg <robert@linux.intel.com> (cherry picked from commit 745cbcbdee0f5b4df4c6a735b03709248a551884)