I am using Intel 945GM Express chipset graphics card with maximum supported OpenGL version 1.4. Is this because of the hardware or OpenGL version which may prevents running occlusion query extension or am I missing something else?
The Mac driver for i945 supports a bunch of GL1.5/2.0/2.1/3.0 features like shadow funcs, GLSL, sRGB, PBO, FBO, etc. But it can still only claim GL1.4, because occlusion query is not supported.
Thank you Simon and Arekkusu for your answers I was looking to get the pixel count with occlusion query, think I have no choice but to use glReadPixel()