Function encode_texel_unorm

Source/astcenc_image.cpp:129–139

* @brief Encode a texel that is entirely LDR linear. * * Out-of-range inputs will be clamped to the valid UNORM range. * * @param data The RGBA data to encode. * @param lns_mask The mask for the HDR channels that need LNS encoding. */

 * @param lns_mask   The mask for the HDR channels that need LNS encoding.
 */
static vfloat4 encode_texel_unorm(
	vfloat4 data,
	vmask4 lns_mask
) {
	(void)lns_mask;
	vfloat4 raw_value = data * 65535.0f;

	// Unorm data must be in 0-1 range, so clamp because data can come from an
	// unconstrained float. This will replace NaNs with zero.
	return clamp(0.0f, 65535.0f, raw_value);
}

/**
 * @brief Encode a texel that includes at least some HDR LNS texels.