Function validate_decompression_swz

Source/astcenc_entry.cpp:379–397

* @brief Validate single channel decompression swizzle. * * @param swizzle The swizzle to check. * * @return Return @c ASTCENC_SUCCESS if validated, otherwise an error on failure. */

 * @return Return @c ASTCENC_SUCCESS if validated, otherwise an error on failure.
 */
static astcenc_error validate_decompression_swz(
	astcenc_swz swizzle
) {
	// Values in this enum are from an external user, so not guaranteed to be
	// bounded to the enum values
	switch (static_cast<int>(swizzle))
	{
	case ASTCENC_SWZ_R:
	case ASTCENC_SWZ_G:
	case ASTCENC_SWZ_B:
	case ASTCENC_SWZ_A:
	case ASTCENC_SWZ_0:
	case ASTCENC_SWZ_1:
	case ASTCENC_SWZ_Z:
		return ASTCENC_SUCCESS;
	default:
		return ASTCENC_ERR_BAD_SWIZZLE;
	}
}

/**
 * @brief Validate overall decompression swizzle.