[poc] curve-filter

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

 /*
  * Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
  * Copyright (C) 2004, 2005, 2006 Apple Computer, Inc.  All rights reserved.
  * Copyright (C) 2008-2009 Torch Mobile, Inc.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
@@ skipping 10 matching lines @@
  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef FrameData_h
 #define FrameData_h
 
+#include "platform/graphics/ColorSpaceFilter.h"
 #include "platform/graphics/ImageOrientation.h"
+#include "third_party/skia/include/core/SkColorFilter.h"
 #include "third_party/skia/include/core/SkImage.h"
+#include "third_party/skia/include/core/SkPicture.h"
 #include "wtf/Allocator.h"
+#include "wtf/HashMap.h"
+#include "wtf/MainThread.h"
 #include "wtf/Noncopyable.h"
 #include "wtf/RefPtr.h"
 #include "wtf/VectorTraits.h"
+#include "wtf/text/StringHash.h"
+#include "wtf/text/WTFString.h"
+
+class ColorTransformImageCache {
+    WTF_MAKE_NONCOPYABLE(ColorTransformImageCache);
+public:
+    ColorTransformImageCache() { }
+
+    void set(const String& key, SkImage* image)
+    {
+        m_colorImages.set(key, image);
+    }
+
+    PassRefPtr<SkImage> find(const String& key) const
+    {
+        HashMap<String, RefPtr<SkImage>>::const_iterator it = m_colorImages.find(key);
+        return it != m_colorImages.end() ? it->value : nullptr;
+    }
+
+    void clear()
+    {
+        m_colorImages.clear();
+    }
+
+private:
+    HashMap<String, RefPtr<SkImage>> m_colorImages;
+};
 
 namespace blink {
 
 struct FrameData {
     DISALLOW_NEW_EXCEPT_PLACEMENT_NEW();
     WTF_MAKE_NONCOPYABLE(FrameData);
 public:
     FrameData();
     ~FrameData();
 
+    PassRefPtr<SkImage> find(SkColorFilter* transform)
+    {
+        return cache().find(colorSpaceFilterKey(transform));
+    }
+
+    void cache(SkColorFilter* transform, SkImage* image)
+    {
+        cache().set(colorSpaceFilterKey(transform), image);
+    }
+
+    ColorTransformImageCache& cache()
+    {
+        RELEASE_ASSERT(isMainThread());
+        return m_cache;
+    }
+
     // Clear the cached image data on the frame, and (optionally) the metadata.
     // Returns whether there was cached image data to clear.
     bool clear(bool clearMetadata);
 
     RefPtr<SkImage> m_frame;
+    ColorTransformImageCache m_cache;
     ImageOrientation m_orientation;
     float m_duration;
     bool m_haveMetadata : 1;
     bool m_isComplete : 1;
     bool m_hasAlpha : 1;
     size_t m_frameBytes;
 };
 
 } // namespace blink
 
 namespace WTF {
 template<> struct VectorTraits<blink::FrameData> : public SimpleClassVectorTraits<blink::FrameData> {
     STATIC_ONLY(VectorTraits);
     static const bool canInitializeWithMemset = false; // Not all FrameData members initialize to 0.
 };
 }
 
 #endif // FrameData_h