Implement color management for ImageData

third_party/WebKit/Source/core/html/ImageData.h

Index: third_party/WebKit/Source/core/html/ImageData.h
diff --git a/third_party/WebKit/Source/core/html/ImageData.h b/third_party/WebKit/Source/core/html/ImageData.h
index 206671a1b48fba1f7b1937dc4cb78414fcb93f8b..286092d814f72f1f2ca689ec7ede782b27f07420 100644
--- a/third_party/WebKit/Source/core/html/ImageData.h
+++ b/third_party/WebKit/Source/core/html/ImageData.h
@@ -31,18 +31,44 @@
 
 #include "bindings/core/v8/ScriptWrappable.h"
 #include "core/CoreExport.h"
+#include "core/dom/DOMArrayBufferView.h"
 #include "core/dom/DOMTypedArray.h"
 #include "core/imagebitmap/ImageBitmapSource.h"
 #include "platform/geometry/IntRect.h"
 #include "platform/geometry/IntSize.h"
 #include "platform/heap/Handle.h"
+#include "wtf/CheckedNumeric.h"
 #include "wtf/Compiler.h"
+#include "wtf/text/WTFString.h"
 
 namespace blink {
 
 class ExceptionState;
 class ImageBitmapOptions;
 
+enum ConstructorParams {
+  kParamSize = 1,
+  kParamWidth = 1 << 1,
+  kParamHeight = 1 << 2,
+  kParamData = 1 << 3,
+  kParamColorSpace = 1 << 4,
+};
+
+enum ImageDataType {
+  kUint8ClampedImageData,
+  kFloat32ImageData,
+};
+
+enum ImageDataColorSpace {
+  kLegacyImageDataColorSpace,
+  kSRGBImageDataColorSpace,
+  kLinearRGBImageDataColorSpace,
+};
+
+const char* const kLinearRGBImageDataColorSpaceName = "linear-rgb";
+const char* const kSRGBImageDataColorSpaceName = "srgb";
+const char* const kLegacyImageDataColorSpaceName = "legacy-srgb";
+
 class CORE_EXPORT ImageData final : public GarbageCollectedFinalized<ImageData>,
                                     public ScriptWrappable,
                                     public ImageBitmapSource {
@@ -60,9 +86,30 @@ class CORE_EXPORT ImageData final : public GarbageCollectedFinalized<ImageData>,
                            unsigned height,
                            ExceptionState&);
 
+  static ImageData* createForTest(const IntSize&);
+
+  ImageData* createImageData(unsigned width,
+                             unsigned height,
+                             String colorSpace,
+                             ExceptionState&);
+  ImageData* createImageData(DOMUint8ClampedArray*,
+                             unsigned width,
+                             String colorSpace,
+                             ExceptionState&);
+  ImageData* createImageData(DOMUint8ClampedArray*,
+                             unsigned width,
+                             unsigned height,
+                             String colorSpace,
+                             ExceptionState&);
+
+  static ImageDataColorSpace getImageDataColorSpace(String);
+  static String getImageDataColorSpaceName(ImageDataColorSpace);
+
   IntSize size() const { return m_size; }
   int width() const { return m_size.width(); }
   int height() const { return m_size.height(); }
+  String colorSpace() const { return getImageDataColorSpaceName(m_colorSpace); }
+  ImageDataColorSpace imageDataColorSpace() { return m_colorSpace; }
   const DOMUint8ClampedArray* data() const { return m_data.get(); }
   DOMUint8ClampedArray* data() { return m_data.get(); }
 
@@ -81,16 +128,28 @@ class CORE_EXPORT ImageData final : public GarbageCollectedFinalized<ImageData>,
       const WrapperTypeInfo*,
       v8::Local<v8::Object> wrapper) override;
 
- private:
-  ImageData(const IntSize&, DOMUint8ClampedArray*);
+  static bool validateConstructorArguments(
+      const unsigned&,
+      const IntSize* = nullptr,
+      const unsigned& = 0,
+      const unsigned& = 0,
+      const DOMArrayBufferView* = nullptr,
+      const String* = nullptr,
+      ExceptionState* = nullptr,
+      ImageDataType = kUint8ClampedImageData);
 
-  static bool validateConstructorArguments(DOMUint8ClampedArray*,
-                                           unsigned width,
-                                           unsigned&,
-                                           ExceptionState&);
+ private:
+  ImageData(const IntSize&,
+            DOMUint8ClampedArray*,
+            String = kLegacyImageDataColorSpaceName);
 
   IntSize m_size;
+  ImageDataColorSpace m_colorSpace;
   Member<DOMUint8ClampedArray> m_data;
+
+  static DOMUint8ClampedArray* allocateAndValidateUint8ClampedArray(
+      const unsigned&,
+      ExceptionState* = nullptr);
 };
 
 }  // namespace blink