Implement proper BGRA extension support on D3D11. See GL_EXT_texture_format_BGRA8888. TRAC #22410 Signed-off-by: Geoff Lang Signed-off-by: Daniel Koch Author: Jamie Madill git-svn-id: https://angleproject.googlecode.com/svn/branches/dx11proto@1771 736b8ea6-26fd-11df-bfd4-992fa37f6226