Use GL_NEAREST filter in the draw-and-read get_data texture fallback
Use GL_NEAREST filter in the draw-and-read get_data texture fallback

The fallback for when glGetTexImage is not available renders the
texture to the framebuffer to read the data using glReadPixels. This
patch just sets the COGL_MATERIAL_FILTER_NEAREST filter mode on the
material before rendering to avoid linear filtering which would alter
the texture data.

gcampax/cogl,djdeath/cogl-android,gcampax/cogl,collects/cogl,Distrotech/cogl,djdeath/cogl,Distrotech/cogl,djdeath/cogl-android,collects/cogl,spatulasnout/cogl,spatulasnout/cogl,gcampax/cogl,djdeath/cogl-android,djdeath/cogl,Distrotech/cogl,djdeath/cogl,Distrotech/cogl,gcampax/cogl