Function get_texels_count

Source/astcenc_entry.cpp:150–167

* @brief Get the total number of texels in an image. * * This function validates that the total size would fit in a size_t and returns * 0 if it does not. * * @param texels_x Number of texels in the X axis. * @param texels_y Number of texels in the Y axis. * @param texels_z Number of texels in the Z axis. * * @return The number of texels in the image, or zero if total size would not

 *         fit into a size_t.
 */
static size_t get_texels_count(
	size_t texels_x,
	size_t texels_y,
	size_t texels_z
) {
	bool overflow { false };

	// Compute texel count
	size_t texels_count = astc::mul_safe(texels_x, texels_y, overflow);
	texels_count = astc::mul_safe(texels_count, texels_z, overflow);

	if (overflow)
	{
		return 0;
	}

	return texels_count;
}

/**
 * @brief Get the total number of blocks in an image.