1GL_ARB_compressed_texture_pixel_storage 2https://www.khronos.org/registry/OpenGL/extensions/ARB/ARB_compressed_texture_pixel_storage.txt 3GL_ARB_compressed_texture_pixel_storage 4 5 GL_UNPACK_COMPRESSED_BLOCK_WIDTH 0x9127 6 GL_UNPACK_COMPRESSED_BLOCK_HEIGHT 0x9128 7 GL_UNPACK_COMPRESSED_BLOCK_DEPTH 0x9129 8 GL_UNPACK_COMPRESSED_BLOCK_SIZE 0x912A 9 GL_PACK_COMPRESSED_BLOCK_WIDTH 0x912B 10 GL_PACK_COMPRESSED_BLOCK_HEIGHT 0x912C 11 GL_PACK_COMPRESSED_BLOCK_DEPTH 0x912D 12 GL_PACK_COMPRESSED_BLOCK_SIZE 0x912E 13