GL_ATI_texture_float http://oss.sgi.com/projects/ogl-sample/registry/ATI/texture_float.txt GL_RGBA_FLOAT32_ATI 0x8814 GL_RGB_FLOAT32_ATI 0x8815 GL_ALPHA_FLOAT32_ATI 0x8816 GL_INTENSITY_FLOAT32_ATI 0x8817 GL_LUMINANCE_FLOAT32_ATI 0x8818 GL_LUMINANCE_ALPHA_FLOAT32_ATI 0x8819 GL_RGBA_FLOAT16_ATI 0x881A GL_RGB_FLOAT16_ATI 0x881B GL_ALPHA_FLOAT16_ATI 0x881C GL_INTENSITY_FLOAT16_ATI 0x881D GL_LUMINANCE_FLOAT16_ATI 0x881E GL_LUMINANCE_ALPHA_FLOAT16_ATI 0x881F