[poc] curve-filter

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

 /*
  * Copyright (C) 2009 Apple Inc. All rights reserved.
  *
  * 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.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 18 matching lines @@
 #include "SkImageFilter.h"
 #include "SkMatrix44.h"
 #include "base/trace_event/trace_event_argument.h"
 #include "cc/layers/layer.h"
 #include "platform/DragImage.h"
 #include "platform/JSONValues.h"
 #include "platform/TraceEvent.h"
 #include "platform/geometry/FloatRect.h"
 #include "platform/geometry/LayoutRect.h"
 #include "platform/graphics/BitmapImage.h"
+#include "platform/graphics/ColorSpaceFilter.h"
+#include "platform/graphics/ColorSpaceProfile.h"
 #include "platform/graphics/FirstPaintInvalidationTracking.h"
 #include "platform/graphics/GraphicsContext.h"
 #include "platform/graphics/GraphicsLayerFactory.h"
+#include "platform/graphics/GraphicsScreen.h"
 #include "platform/graphics/Image.h"
+#include "platform/graphics/ImageBuffer.h"
 #include "platform/graphics/LinkHighlight.h"
 #include "platform/graphics/filters/SkiaImageFilterBuilder.h"
 #include "platform/graphics/paint/DrawingRecorder.h"
 #include "platform/graphics/paint/PaintController.h"
 #include "platform/scroll/ScrollableArea.h"
 #include "platform/text/TextStream.h"
 #include "public/platform/Platform.h"
 #include "public/platform/WebCompositorAnimation.h"
 #include "public/platform/WebCompositorSupport.h"
 #include "public/platform/WebFilterOperations.h"
@@ skipping 1005 matching lines @@
 
     m_contentsRect = rect;
     updateContentsRect();
 }
 
 void GraphicsLayer::setContentsToImage(Image* image, RespectImageOrientationEnum respectImageOrientation)
 {
     RefPtr<SkImage> skImage = image ? image->imageForCurrentFrame() : nullptr;
 
     if (image && skImage && image->isBitmapImage()) {
-        if (respectImageOrientation == RespectImageOrientation) {
+        RELEASE_ASSERT(currentScreenId()); // There should be an active graphics screen.
+
+        if (imageColorProfilesEnabled() && toBitmapImage(image)->hasColorProfile()) {
+            // FIXME: maybe pass the color transform filter to the layer so it gets applied on the GPU.
+            // FIXME: alternative is to somehow cache this local drawing on this GraphicsLayer, which would
+            // save having to plumb transform SkColorFilters through to the GPU process, or else have BitmapImage
+            // cache color corrected images and provide the appropriate image here.
+            // FIXME: In an experiment, I passed a SkColorCubeFilter to the GPU and that works. But note that
+            // SkColorCurveFilter does not: it gets dropped on floor somewhere after CC sends it to the GPU process
+            // (maybe because SkColorCurveFilter has float-16 textures, whereas SkColorCubeFilter does not?).
+
+            /*
+            bool opaque = image->currentFrameKnownToBeOpaque();
+            OwnPtr<ImageBuffer> buffer = ImageBuffer::create(image->size(), opaque ? Opaque : NonOpaque);
+            IntRect source = IntRect(IntPoint(), image->size());
+            image->draw(buffer->canvas(), SkPaint(), source, source, DoNotRespectImageOrientation, Image::ClampImageToSourceRect);
+            skImage = buffer->newSkImageSnapshot(PreferNoAcceleration);
+            */
+
+            OwnPtr<PaintController> paintController = PaintController::create();
+            GraphicsContext context(*paintController);
+
+            FloatRect bounds(0, 0, image->size().width(), image->size().width());
+            context.beginRecording(bounds);
+            context.drawImage(image, IntRect(0, 0, image->size().width(), image->size().width()));
+            RefPtr<const SkPicture> picture = context.endRecording();
+
+            SkISize skISize = SkISize::Make(image->size().width(), image->size().width());
+            skImage = SkImage::NewFromPicture(picture.get(), skISize, nullptr, nullptr);
+
+            /*
+            FIXME: SkRef counting on the SkImage counting ASSERTs on the Mac Release try: find out why.

[Noel Gordon, 2015/12/01 03:15:47]

Need an adoptRef at the end: 
  skImage = adoptRef(SkImage::NewFromPicture(picture.get(), skISize, nullptr,
&transformPaint));

[Noel Gordon, 2015/12/01 03:18:09]

And similarly for the skImage created @ line 1100 right.

+            SkPictureRecorder recorder;
+            SkRect bounds = SkRect::MakeIWH(skImage->width(), skImage->height());
+            SkCanvas* canvas = recorder.beginRecording(bounds, nullptr, 0);
+
+            SkPaint defaultPaint;
+            canvas->drawImageRect(skImage.get(), bounds, bounds, &defaultPaint, SkCanvas::kStrict_SrcRectConstraint);
+            RefPtr<SkPicture> picture = adoptRef(recorder.endRecording());
+
+            SkPaint transformPaint;
+            RefPtr<ColorSpaceProfile> screen = screenColorProfile(currentScreenId());
+            RefPtr<ColorSpaceProfile> source = toBitmapImage(image)->colorProfile();
+            if (RefPtr<SkColorFilter> colorTransform = createColorSpaceFilter(source.get(), screen.get()))
+                transformPaint.setColorFilter(colorTransform.get());
+
+            SkISize skISize = SkISize::Make(skImage->width(), skImage->height());
+            skImage = SkImage::NewFromPicture(picture.get(), skISize, nullptr, &transformPaint);
+            */
+        }
+
+        if (skImage && respectImageOrientation == RespectImageOrientation) {
             ImageOrientation imageOrientation = toBitmapImage(image)->currentFrameOrientation();
             skImage = DragImage::resizeAndOrientImage(skImage.release(), imageOrientation);
         }
     }
 
     if (image && skImage) {
         if (!m_imageLayer) {
             m_imageLayer = adoptPtr(Platform::current()->compositorSupport()->createImageLayer());
             registerContentsLayer(m_imageLayer->layer());
         }
@@ skipping 143 matching lines @@
 {
     if (!layer) {
         fprintf(stderr, "Cannot showGraphicsLayerTree for (nil).\n");
         return;
     }
 
     String output = layer->layerTreeAsText(blink::LayerTreeIncludesDebugInfo);
     fprintf(stderr, "%s\n", output.utf8().data());
 }
 #endif