1 files changed, 84 insertions, 0 deletions
diff --git a/src/include/glm/gtc/color_space.inl b/src/include/glm/gtc/color_space.inl
new file mode 100644
index 0000000..2b72d70
--- /dev/null
+++ b/src/include/glm/gtc/color_space.inl
@@ -0,0 +1,84 @@
+/// @ref gtc_color_space
+
+namespace glm{
+namespace detail
+{
+	template<length_t L, typename T, qualifier Q>
+	struct compute_rgbToSrgb
+	{
+		GLM_FUNC_QUALIFIER static vec<L, T, Q> call(vec<L, T, Q> const& ColorRGB, T GammaCorrection)
+		{
+			vec<L, T, Q> const ClampedColor(clamp(ColorRGB, static_cast<T>(0), static_cast<T>(1)));
+
+			return mix(
+				pow(ClampedColor, vec<L, T, Q>(GammaCorrection)) * static_cast<T>(1.055) - static_cast<T>(0.055),
+				ClampedColor * static_cast<T>(12.92),
+				lessThan(ClampedColor, vec<L, T, Q>(static_cast<T>(0.0031308))));
+		}
+	};
+
+	template<typename T, qualifier Q>
+	struct compute_rgbToSrgb<4, T, Q>
+	{
+		GLM_FUNC_QUALIFIER static vec<4, T, Q> call(vec<4, T, Q> const& ColorRGB, T GammaCorrection)
+		{
+			return vec<4, T, Q>(compute_rgbToSrgb<3, T, Q>::call(vec<3, T, Q>(ColorRGB), GammaCorrection), ColorRGB.w);
+		}
+	};
+
+	template<length_t L, typename T, qualifier Q>
+	struct compute_srgbToRgb
+	{
+		GLM_FUNC_QUALIFIER static vec<L, T, Q> call(vec<L, T, Q> const& ColorSRGB, T Gamma)
+		{
+			return mix(
+				pow((ColorSRGB + static_cast<T>(0.055)) * static_cast<T>(0.94786729857819905213270142180095), vec<L, T, Q>(Gamma)),
+				ColorSRGB * static_cast<T>(0.07739938080495356037151702786378),
+				lessThanEqual(ColorSRGB, vec<L, T, Q>(static_cast<T>(0.04045))));
+		}
+	};
+
+	template<typename T, qualifier Q>
+	struct compute_srgbToRgb<4, T, Q>
+	{
+		GLM_FUNC_QUALIFIER static vec<4, T, Q> call(vec<4, T, Q> const& ColorSRGB, T Gamma)
+		{
+			return vec<4, T, Q>(compute_srgbToRgb<3, T, Q>::call(vec<3, T, Q>(ColorSRGB), Gamma), ColorSRGB.w);
+		}
+	};
+}//namespace detail
+
+	template<length_t L, typename T, qualifier Q>
+	GLM_FUNC_QUALIFIER vec<L, T, Q> convertLinearToSRGB(vec<L, T, Q> const& ColorLinear)
+	{
+		return detail::compute_rgbToSrgb<L, T, Q>::call(ColorLinear, static_cast<T>(0.41666));
+	}
+
+	// Based on Ian Taylor http://chilliant.blogspot.fr/2012/08/srgb-approximations-for-hlsl.html
+	template<>
+	GLM_FUNC_QUALIFIER vec<3, float, lowp> convertLinearToSRGB(vec<3, float, lowp> const& ColorLinear)
+	{
+		vec<3, float, lowp> S1 = sqrt(ColorLinear);
+		vec<3, float, lowp> S2 = sqrt(S1);
+		vec<3, float, lowp> S3 = sqrt(S2);
+		return 0.662002687f * S1 + 0.684122060f * S2 - 0.323583601f * S3 - 0.0225411470f * ColorLinear;
+	}
+
+	template<length_t L, typename T, qualifier Q>
+	GLM_FUNC_QUALIFIER vec<L, T, Q> convertLinearToSRGB(vec<L, T, Q> const& ColorLinear, T Gamma)
+	{
+		return detail::compute_rgbToSrgb<L, T, Q>::call(ColorLinear, static_cast<T>(1) / Gamma);
+	}
+
+	template<length_t L, typename T, qualifier Q>
+	GLM_FUNC_QUALIFIER vec<L, T, Q> convertSRGBToLinear(vec<L, T, Q> const& ColorSRGB)
+	{
+		return detail::compute_srgbToRgb<L, T, Q>::call(ColorSRGB, static_cast<T>(2.4));
+	}
+
+	template<length_t L, typename T, qualifier Q>
+	GLM_FUNC_QUALIFIER vec<L, T, Q> convertSRGBToLinear(vec<L, T, Q> const& ColorSRGB, T Gamma)
+	{
+		return detail::compute_srgbToRgb<L, T, Q>::call(ColorSRGB, Gamma);
+	}
+}//namespace glm