From a331286b303afd1bfbe73de77aaad5c4de365b18 Mon Sep 17 00:00:00 2001
From: hyzboy <hyzboy@gmail.com>
Date: Tue, 7 Jan 2020 18:14:16 +0800
Subject: [PATCH] add ColorSpace.h

---
 CMCore                                 |  2 +-
 inc/hgl/graph/ColorSpace.h             | 66 ++++++++++++++++++++++++++
 src/RenderDevice/Shader/CMakeLists.txt |  1 -
 3 files changed, 67 insertions(+), 2 deletions(-)
 create mode 100644 inc/hgl/graph/ColorSpace.h

diff --git a/CMCore b/CMCore
index 7152bd67..122c7add 160000
--- a/CMCore
+++ b/CMCore
@@ -1 +1 @@
-Subproject commit 7152bd677cfc4ea0b33b21b49895e5e049e1b0bd
+Subproject commit 122c7addc294daa1d2c8c19ed08b1b50aa47571f
diff --git a/inc/hgl/graph/ColorSpace.h b/inc/hgl/graph/ColorSpace.h
new file mode 100644
index 00000000..319d6186
--- /dev/null
+++ b/inc/hgl/graph/ColorSpace.h
@@ -0,0 +1,66 @@
+#ifndef HGL_GRAPH_COLOR_SPACE_INCLUDE
+#define HGL_GRAPH_COLOR_SPACE_INCLUDE
+
+namespace hgl
+{
+    namespace graph
+    {
+        enum class ColorSpace
+        {
+            Linear=0,
+            sRGB,
+            YCbCr,
+
+            BEGIN_RANGE =Linear,
+            END_RANGE   =YCbCr,
+            RANGE_SIZE  =(END_RANGE-BEGIN_RANGE)+1
+        };//enum class ColorSpace
+
+        template<typename T>
+        inline const T sRGB2Linear(const T &in)
+        {
+            if(in<=0.4045)
+                return in/12.92;
+            else
+                return pow((in+0.55)/1.055,2.4);
+        }
+
+        template<typename T>
+        inline const T Linear2sRGB(const T &in)
+        {
+            if(in<=0.0031308f)
+                return in*12.92f;
+            else
+                return pow((in*1.055f),1.0f/2.4f)-0.055f;
+        }
+
+        template<typename T>
+        inline const T sRGB2LinearApprox(const T &in)
+        {
+            return pow(in,2.2f);
+        }
+
+        template<typename T>
+        inline const T Linear2sRGBApprox(const T &in)
+        {
+            return pow(in,1.0f/2.2f);
+        }
+
+        template<typename T>
+        inline void sRGB2LinearFast(T &x,T &y,T &z,const T &r,const T &g,const T &b)
+        {
+            x=0.4124f*r+0.3576f*g+0.1805f*b;
+            y=0.2126f*r+0.7152f*g+0.0722f*b;
+            z=0.0193f*r+0.1192f*g+0.9505f*b;
+        }
+
+        template<typename T>
+        inline void Linear2sRGBFast(T &r,T &g,T &b,const T &x,const T &y,const T &z)
+        {
+            r= 3.2406f*x-1.5373f*y-0.4986f*z;
+            g=-0.9689f*x+1.8758f*y+0.0416f*z;
+            b= 0.0557f*x-0.2040f*y+1.0570f*z;
+        }
+    }//namespace graph
+}//namespace hgl
+#endif//HGL_GRAPH_COLOR_SPACE_INCLUDE
diff --git a/src/RenderDevice/Shader/CMakeLists.txt b/src/RenderDevice/Shader/CMakeLists.txt
index 594cdb52..7d57490d 100644
--- a/src/RenderDevice/Shader/CMakeLists.txt
+++ b/src/RenderDevice/Shader/CMakeLists.txt
@@ -34,4 +34,3 @@ add_cm_library(ULRE.Shader "ULRE"   ${GRAPH_SHADER_HEADER_PATH}/common.h
                                     ${GRAPH_SHADER_PARAM_FILES}
                                     ${GRAPH_SHADER_MAKER_SOURCE}
                                     ${GRAPH_SPV_SOURCE})
-