case BC_YUV101010: return 3;
case BC_RGB_FLOAT: return 3;
case BC_RGBA_FLOAT: return 4;
case BC_RGB_FLOATP: return 3;
case BC_RGBA_FLOATP: return 4;
case BC_YUV101010: return 3;
case BC_RGB_FLOAT: return 3;
case BC_RGBA_FLOAT: return 4;
case BC_RGB_FLOATP: return 3;
case BC_RGBA_FLOATP: return 4;