[poc] curve-filter

third_party/WebKit/Source/platform/graphics/Color.h

Index: third_party/WebKit/Source/platform/graphics/Color.h
diff --git a/third_party/WebKit/Source/platform/graphics/Color.h b/third_party/WebKit/Source/platform/graphics/Color.h
index 681000ace876648888670752e0a358e47ee66b09..782b1ce90e4974a1492233969eab335e5037d44e 100644
--- a/third_party/WebKit/Source/platform/graphics/Color.h
+++ b/third_party/WebKit/Source/platform/graphics/Color.h
@@ -62,20 +62,23 @@ PLATFORM_EXPORT const NamedColor* findColor(register const char* str, register u
 class PLATFORM_EXPORT Color {
     DISALLOW_NEW_EXCEPT_PLACEMENT_NEW();
 public:
-    Color() : m_color(Color::transparent) { }
-    Color(RGBA32 color) : m_color(color) { }
-    Color(int r, int g, int b) : m_color(makeRGB(r, g, b)) { }
-    Color(int r, int g, int b, int a) : m_color(makeRGBA(r, g, b, a)) { }
+    Color() : m_color(Color::transparent), m_device(false) { }
+    Color(RGBA32 color) : m_color(color), m_device(false) { }
+    Color(int r, int g, int b) : m_color(makeRGB(r, g, b)), m_device(false) { }
+    Color(int r, int g, int b, int a) : m_color(makeRGBA(r, g, b, a)), m_device(false) { }
     // Color is currently limited to 32bit RGBA, perhaps some day we'll support better colors
-    Color(float r, float g, float b, float a) : m_color(makeRGBA32FromFloats(r, g, b, a)) { }
+    Color(float r, float g, float b, float a) : m_color(makeRGBA32FromFloats(r, g, b, a)), m_device(false) { }
     // Creates a new color from the specific CMYK and alpha values.
-    Color(float c, float m, float y, float k, float a) : m_color(makeRGBAFromCMYKA(c, m, y, k, a)) { }
+    Color(float c, float m, float y, float k, float a) : m_color(makeRGBAFromCMYKA(c, m, y, k, a)), m_device(false) { }
+
+    bool isDeviceColor() const { return m_device; }
 
     static Color createUnchecked(int r, int g, int b)
     {
         RGBA32 color = 0xFF000000 | r << 16 | g << 8 | b;
         return Color(color);
     }
+
     static Color createUnchecked(int r, int g, int b, int a)
     {
         RGBA32 color = a << 24 | r << 16 | g << 8 | b;
@@ -133,8 +136,18 @@ public:
     static const RGBA32 lightGray = 0xFFC0C0C0;
     static const RGBA32 transparent = 0x00000000;
 
+    static Color toDeviceColor(const Color&);
+
 private:
+    Color(RGBA32 color, bool device) : m_color(color), m_device(device) { }
+
+    static Color asDeviceColor(const Color& color)
+    {
+        return Color(color.rgb(), true);
+    }
+
     RGBA32 m_color;
+    bool m_device;
 };
 
 inline bool operator==(const Color& a, const Color& b)
@@ -171,6 +184,7 @@ inline Color blend(const Color& from, const Color& to, double progress, bool ble
                  blend(from.blue(), to.blue(), progress),
                  blend(from.alpha(), to.alpha(), progress));
 }
+
 } // namespace blink
 
 #endif // Color_h