[poc] curve-filter

third_party/WebKit/Source/platform/graphics/ImageBufferSurface.cpp

Index: third_party/WebKit/Source/platform/graphics/ImageBufferSurface.cpp
diff --git a/third_party/WebKit/Source/platform/graphics/ImageBufferSurface.cpp b/third_party/WebKit/Source/platform/graphics/ImageBufferSurface.cpp
index 9bf60796d027bd4089bce72b1922b06ad77deb16..a5d67b7c2b0c4f5e7ca2a4ae1127bb2ea4d1e1aa 100644
--- a/third_party/WebKit/Source/platform/graphics/ImageBufferSurface.cpp
+++ b/third_party/WebKit/Source/platform/graphics/ImageBufferSurface.cpp
@@ -33,6 +33,7 @@
 #include "platform/graphics/GraphicsContext.h"
 #include "platform/graphics/ImageBuffer.h"
 #include "platform/graphics/StaticBitmapImage.h"
+#include "third_party/skia/include/core/SkColorFilter.h"
 #include "third_party/skia/include/core/SkImage.h"
 
 class SkPicture;
@@ -60,7 +61,7 @@ void ImageBufferSurface::clear()
     // color. Can we have another way to manage this?
     if (isValid()) {
         if (m_opacityMode == Opaque) {
-            canvas()->clear(SK_ColorBLACK);
+            canvas()->clear(SK_ColorBLACK); // FIXME: not color correct.
         } else {
             canvas()->clear(SK_ColorTRANSPARENT);
         }
@@ -68,12 +69,31 @@ void ImageBufferSurface::clear()
     }
 }
 
-void ImageBufferSurface::draw(GraphicsContext& context, const FloatRect& destRect, const FloatRect& srcRect, SkXfermode::Mode op)
+void ImageBufferSurface::draw(GraphicsContext& context, const FloatRect& destRect, const FloatRect& srcRect, SkXfermode::Mode op, SkColorFilter* transform)
 {
     RefPtr<SkImage> snapshot = newImageSnapshot(PreferNoAcceleration);
     if (!snapshot)
         return;
 
+    if (!transform) {
+        RefPtr<Image> image = StaticBitmapImage::create(snapshot.release());
+        context.drawImage(image.get(), destRect, srcRect, op);
+        return;
+    }
+
+    SkPaint transformPaint;
+    transformPaint.setColorFilter(transform);
+    transformPaint.setXfermodeMode(SkXfermode::kSrc_Mode);
+
+    SkPictureRecorder recorder;
+    FloatRect sourceRect = IntRect(0, 0, width(), height());
+    SkCanvas* canvas = recorder.beginRecording(sourceRect);
+    canvas->drawImage(snapshot.get(), 0, 0, &transformPaint);
+    RefPtr<SkPicture> recorded = adoptRef(recorder.endRecordingAsPicture());
+
+    SkISize size = SkISize::Make(width(), height());
+    snapshot = adoptRef(SkImage::NewFromPicture(recorded.get(), size, nullptr, nullptr));
+
     RefPtr<Image> image = StaticBitmapImage::create(snapshot.release());
     context.drawImage(image.get(), destRect, srcRect, op);
 }