[Mesa-dev] [RFC] intel: add support for EGL_KHR_gl_image

[Abdiel Janulgue]

This patch set adds support for KHR_gl_texture_2D_image, KHR_gl_texture_cubemap_image
and KHR_gl_texture_3D_image for Gen 4 -> Gen7 HW. The extension enables us to be a bit 
more conformant to the spec in Android at least. I've tested it on SandyBridge and IvyBridge.

The approach is to export a mipmap level to a DRIImage accounting for the level's
offset from the surface base address including the x and y offsets on cubemap face or 3D texture
slices.

I've pushed it in git at gitorious.org/mesa3d/mesa.git KHR_gl_image branch. I'll submit a 
a separate piglit test to soon to piglit-dev.