Neil Roberts a86a1df372 cogl-pipeline-glsl: Generate the alpha test snippet under GLES2
GLES2 has no glAlphaFunc function so we need to simulate the behaviour
in the fragment shader. The alpha test function is simulated with an
if-statement and a discard statement. The reference value is stored as
a uniform.
2010-11-24 18:06:44 +00:00
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