[Cogl] [PATCH 0/8] Flip rendering from cogl-gles2-context

[Neil Roberts]

When using a CoglGLES2Context to render to a CoglOffscreen the image
will end up so that the top is near the texture coordinates 0,1
whereas Cogl expects them to be at 0,0. Here is a series of patches to
try and force the rendering to be flipped when rendering to a Cogl
offscreen so that Cogl applications don't have to be aware of this
mismatch.