[5/5] WineD3D: Use GL_ATI_meminfo if available

[Henri Verbeet]

2009/9/5 Stefan Dösinger <stefan at codeweavers.com>:
> +        /* All GL_ATI_meminfo enums return 4 ints, even the (undocumented)
> +         * GL_TOTAL_PHYSICAL_MEMORY_ATI one, which returns {mem, 0, 0, 0} */
> +        GLint mem[4];
> +        /* Returns the vidmem in KB */
> +        glGetIntegerv(GL_TOTAL_PHYSICAL_MEMORY_ATI, mem);
> +        checkGLcall("glGetIntegerv(GL_TOTAL_PHYSICAL_MEMORY_ATI, mem)");
> +
> +        /* The first driver version that supports ATI_meminfo doesn't implement
> +         * GL_TOTAL_PHYSICAL_MEMORY_ATI - catch this situation as adviced by AMD
> +         */
> +        if(mem[0] < 65536)
If the implementation doesn't recognise "GL_TOTAL_PHYSICAL_MEMORY_ATI"
you're testing uninitialized memory here. I hope AMD didn't actually
advice you to code it like that.