1GL_ARB_depth_texture 2https://www.khronos.org/registry/OpenGL/extensions/ARB/ARB_depth_texture.txt 3GL_ARB_depth_texture 4 5 GL_DEPTH_COMPONENT16_ARB 0x81A5 6 GL_DEPTH_COMPONENT24_ARB 0x81A6 7 GL_DEPTH_COMPONENT32_ARB 0x81A7 8 GL_TEXTURE_DEPTH_SIZE_ARB 0x884A 9 GL_DEPTH_TEXTURE_MODE_ARB 0x884B 10