2d084d4ec4
This is caused by a driver bug that prevent us from rendering to (or even binding) a texture mip level that is below GL_TEXTURE_MAX_LEVEL of the target texture. This is fine in most drivers (and legal AFAIK) but not on thoses Intels HDXXX + Windows. As a fix we just put GL_TEXTURE_MAX_LEVEL lower (which is illegal because it is undefined behaviour), but in practice it works ok and does not trigger any warnings or errors. This commit fixes most of the problems encountered on these GPUs (T56668).