[poc] curve-filter

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

Index: third_party/WebKit/Source/platform/graphics/GraphicsLayer.cpp
diff --git a/third_party/WebKit/Source/platform/graphics/GraphicsLayer.cpp b/third_party/WebKit/Source/platform/graphics/GraphicsLayer.cpp
index b7b79c3656410450041b3ac09c617307c4f5606a..4a0eda73ca5b9b88cdc2ca8c528b9dc000d520a7 100644
--- a/third_party/WebKit/Source/platform/graphics/GraphicsLayer.cpp
+++ b/third_party/WebKit/Source/platform/graphics/GraphicsLayer.cpp
@@ -35,9 +35,12 @@
 #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/LinkHighlight.h"
 #include "platform/graphics/filters/SkiaImageFilterBuilder.h"
@@ -54,6 +57,7 @@
 #include "public/platform/WebLayer.h"
 #include "public/platform/WebPoint.h"
 #include "public/platform/WebSize.h"
+#include "third_party/skia/include/effects/SkColorFilterImageFilter.h"
 #include "wtf/CurrentTime.h"
 #include "wtf/HashMap.h"
 #include "wtf/HashSet.h"
@@ -1082,8 +1086,23 @@ void GraphicsLayer::setContentsToImage(Image* image, RespectImageOrientationEnum
 {
     RefPtr<SkImage> skImage = image ? image->imageForCurrentFrame() : nullptr;
 
-    if (image && skImage && image->isBitmapImage()) {
-        if (respectImageOrientation == RespectImageOrientation) {
+    RefPtr<SkColorFilter> colorTransform;
+
+    if (skImage && image->isBitmapImage()) {
+        RELEASE_ASSERT(currentScreenId()); // There should be an active graphics screen.
+
+        if (imageColorProfilesEnabled() && toBitmapImage(image)->hasColorProfile()) {
+            // FIXME: In an experiment, I passed a SkColorCubeFilter to the GPU and that works. But note
+            // that a SkColorCurveFilter does not - it gets dropped on floor somewhere after CC sends it
+            // to the GPU process (maybe because SkColorCurveFilter has float-16 (HALF_FLOAT) textures,
+            // whereas SkColorCubeFilter does not?).
+            if (RefPtr<ColorSpaceProfile> source = toBitmapImage(image)->colorProfile()) {
+                RefPtr<ColorSpaceProfile> target = screenColorProfile(currentScreenId());
+                colorTransform = createColorSpaceFilter(source.get(), target.get());
+            }
+        }
+
+        if (skImage && respectImageOrientation == RespectImageOrientation) {
             ImageOrientation imageOrientation = toBitmapImage(image)->currentFrameOrientation();
             skImage = DragImage::resizeAndOrientImage(skImage.release(), imageOrientation);
         }
@@ -1105,6 +1124,14 @@ void GraphicsLayer::setContentsToImage(Image* image, RespectImageOrientationEnum
     }
 
     setContentsTo(m_imageLayer ? m_imageLayer->layer() : 0);
+
+    if (!imageColorProfilesEnabled())
+        return;
+
+    if (colorTransform)
+        setContentsLayerColorTransform(colorSpaceFlattenableFilter(colorTransform.get()));
+    else
+        setContentsLayerColorTransform(nullptr);
 }
 
 bool GraphicsLayer::addAnimation(PassOwnPtr<WebCompositorAnimation> popAnimation)
@@ -1138,6 +1165,21 @@ WebLayer* GraphicsLayer::platformLayer() const
     return m_layer->layer();
 }
 
+void GraphicsLayer::setContentsLayerColorTransform(PassRefPtr<SkColorFilter> filter)
+{
+    if (!m_contentsLayer)
+        return;
+
+    RefPtr<SkImageFilter> colorTransform;
+    if (RefPtr<SkColorFilter> colorFilter = filter)
+        colorTransform = adoptRef(SkColorFilterImageFilter::Create(colorFilter.get()));
+
+    OwnPtr<WebFilterOperations> webFilters = adoptPtr(Platform::current()->compositorSupport()->createFilterOperations());
+    if (colorTransform)
+        webFilters->appendReferenceFilter(colorTransform.get());
+    m_contentsLayer->setFilters(*webFilters);
+}
+
 void GraphicsLayer::setFilters(const FilterOperations& filters)
 {
     SkiaImageFilterBuilder builder;