_mesa_get_format_block_size(mesa_format format, GLuint *bw, GLuint *bh)
{
const struct gl_format_info *info = _mesa_get_format_info(format);
+ /* Use _mesa_get_format_block_size_3d() for 3D blocks. */
+ assert(info->BlockDepth == 1);
+
*bw = info->BlockWidth;
*bh = info->BlockHeight;
}