egl: clear backgrounds black
if 50% translucency used, the application render result can vary depending on the format chosen, such as R10G10B10A2 or RGB24.
Signed-off-by: Jiyu Yang jiyu.yang@nxp.com
if 50% translucency used, the application render result can vary depending on the format chosen, such as R10G10B10A2 or RGB24.
Signed-off-by: Jiyu Yang jiyu.yang@nxp.com