1 files changed, 108 insertions, 0 deletions

diff --git a/external/include/glm/gtx/color_space_YCoCg.inl b/external/include/glm/gtx/color_space_YCoCg.inl
new file mode 100644
index 0000000..1ca2e5b
--- /dev/null
+++ b/external/include/glm/gtx/color_space_YCoCg.inl
@@ -0,0 +1,108 @@
+/// @ref gtx_color_space_YCoCg
+/// @file glm/gtx/color_space_YCoCg.inl
+
+namespace glm
+{
+	template <typename T, precision P>
+	GLM_FUNC_QUALIFIER tvec3<T, P> rgb2YCoCg
+	(
+		tvec3<T, P> const & rgbColor
+	)
+	{
+		tvec3<T, P> result;
+		result.x/*Y */ =   rgbColor.r / T(4) + rgbColor.g / T(2) + rgbColor.b / T(4);
+		result.y/*Co*/ =   rgbColor.r / T(2) + rgbColor.g * T(0) - rgbColor.b / T(2);
+		result.z/*Cg*/ = - rgbColor.r / T(4) + rgbColor.g / T(2) - rgbColor.b / T(4);
+		return result;
+	}
+
+	template <typename T, precision P>
+	GLM_FUNC_QUALIFIER tvec3<T, P> YCoCg2rgb
+	(
+		tvec3<T, P> const & YCoCgColor
+	)
+	{
+		tvec3<T, P> result;
+		result.r = YCoCgColor.x + YCoCgColor.y - YCoCgColor.z;
+		result.g = YCoCgColor.x				   + YCoCgColor.z;
+		result.b = YCoCgColor.x - YCoCgColor.y - YCoCgColor.z;
+		return result;
+	}
+
+	template <typename T, precision P, bool isInteger>
+	class compute_YCoCgR {
+	public:
+		static GLM_FUNC_QUALIFIER tvec3<T, P> rgb2YCoCgR
+		(
+			tvec3<T, P> const & rgbColor
+		)
+		{
+			tvec3<T, P> result;
+			result.x/*Y */ = rgbColor.g / T(2) + (rgbColor.r + rgbColor.b) / T(4);
+			result.y/*Co*/ = rgbColor.r - rgbColor.b;
+			result.z/*Cg*/ = rgbColor.g - (rgbColor.r + rgbColor.b) / T(2);
+			return result;
+		}
+
+		static GLM_FUNC_QUALIFIER tvec3<T, P> YCoCgR2rgb
+		(
+			tvec3<T, P> const & YCoCgRColor
+		)
+		{
+			tvec3<T, P> result;
+			T tmp = YCoCgRColor.x - (YCoCgRColor.z / T(2));
+			result.g = YCoCgRColor.z + tmp;
+			result.b = tmp - (YCoCgRColor.y / T(2));
+			result.r = result.b + YCoCgRColor.y;
+			return result;
+		}
+	};
+
+	template <typename T, precision P>
+	class compute_YCoCgR<T, P, true> {
+	public:
+		static GLM_FUNC_QUALIFIER tvec3<T, P> rgb2YCoCgR
+		(
+			tvec3<T, P> const & rgbColor
+		)
+		{
+			tvec3<T, P> result;
+			result.y/*Co*/ = rgbColor.r - rgbColor.b;
+			T tmp = rgbColor.b + (result.y >> 1);
+			result.z/*Cg*/ = rgbColor.g - tmp;
+			result.x/*Y */ = tmp + (result.z >> 1);
+			return result;
+		}
+
+		static GLM_FUNC_QUALIFIER tvec3<T, P> YCoCgR2rgb
+		(
+			tvec3<T, P> const & YCoCgRColor
+		)
+		{
+			tvec3<T, P> result;
+			T tmp = YCoCgRColor.x - (YCoCgRColor.z >> 1);
+			result.g = YCoCgRColor.z + tmp;
+			result.b = tmp - (YCoCgRColor.y >> 1);
+			result.r = result.b + YCoCgRColor.y;
+			return result;
+		}
+	};
+
+	template <typename T, precision P>
+	GLM_FUNC_QUALIFIER tvec3<T, P> rgb2YCoCgR
+	(
+		tvec3<T, P> const & rgbColor
+	)
+	{
+		return compute_YCoCgR<T, P, std::numeric_limits<T>::is_integer>::rgb2YCoCgR(rgbColor);
+	}
+
+	template <typename T, precision P>
+	GLM_FUNC_QUALIFIER tvec3<T, P> YCoCgR2rgb
+	(
+		tvec3<T, P> const & YCoCgRColor
+	)
+	{
+		return compute_YCoCgR<T, P, std::numeric_limits<T>::is_integer>::YCoCgR2rgb(YCoCgRColor);
+	}
+}//namespace glm