shader: Don't emit gl_FragCoord layout qualifier on GLES and emulate pixel_center_integer
Fixes a number of piglitson GLES hosts. e.g. : texelFetch * sampler2DMS * *
Signed-off-by: Gert Wollny gert.wollny@collabora.com
Fixes a number of piglitson GLES hosts. e.g. : texelFetch * sampler2DMS * *
Signed-off-by: Gert Wollny gert.wollny@collabora.com