Remove CSS clients of ImageResource

sky/engine/core/css/CSSCrossfadeValue.cpp

Index: sky/engine/core/css/CSSCrossfadeValue.cpp
diff --git a/sky/engine/core/css/CSSCrossfadeValue.cpp b/sky/engine/core/css/CSSCrossfadeValue.cpp
deleted file mode 100644
index 810867526e67d2e9a7f649c04efdb1e2ac09bcea..0000000000000000000000000000000000000000
--- a/sky/engine/core/css/CSSCrossfadeValue.cpp
+++ /dev/null
@@ -1,211 +0,0 @@
-/*
- * Copyright (C) 2011 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
- *    documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
- * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
- * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
- * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- * 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.
- */
-
-#include "sky/engine/core/css/CSSCrossfadeValue.h"
-
-#include "sky/engine/core/css/CSSImageValue.h"
-#include "sky/engine/core/rendering/RenderObject.h"
-#include "sky/engine/core/rendering/style/StyleFetchedImage.h"
-#include "sky/engine/platform/graphics/CrossfadeGeneratedImage.h"
-#include "sky/engine/wtf/text/StringBuilder.h"
-
-namespace blink {
-
-static bool subimageIsPending(CSSValue* value)
-{
-    if (value->isImageValue())
-        return toCSSImageValue(value)->cachedOrPendingImage()->isPendingImage();
-
-    if (value->isImageGeneratorValue())
-        return toCSSImageGeneratorValue(value)->isPending();
-
-    ASSERT_NOT_REACHED();
-
-    return false;
-}
-
-static bool subimageKnownToBeOpaque(CSSValue* value, const RenderObject* renderer)
-{
-    if (value->isImageValue())
-        return toCSSImageValue(value)->knownToBeOpaque(renderer);
-
-    if (value->isImageGeneratorValue())
-        return toCSSImageGeneratorValue(value)->knownToBeOpaque(renderer);
-
-    ASSERT_NOT_REACHED();
-
-    return false;
-}
-
-static ImageResource* cachedImageForCSSValue(CSSValue* value, ResourceFetcher* fetcher)
-{
-    if (!value)
-        return 0;
-
-    if (value->isImageValue()) {
-        StyleFetchedImage* styleImageResource = toCSSImageValue(value)->cachedImage(fetcher);
-        if (!styleImageResource)
-            return 0;
-
-        return styleImageResource->cachedImage();
-    }
-
-    if (value->isImageGeneratorValue()) {
-        toCSSImageGeneratorValue(value)->loadSubimages(fetcher);
-        // FIXME: Handle CSSImageGeneratorValue (and thus cross-fades with gradients and canvas).
-        return 0;
-    }
-
-    ASSERT_NOT_REACHED();
-
-    return 0;
-}
-
-CSSCrossfadeValue::~CSSCrossfadeValue()
-{
-    if (m_cachedFromImage)
-        m_cachedFromImage->removeClient(&m_crossfadeSubimageObserver);
-    if (m_cachedToImage)
-        m_cachedToImage->removeClient(&m_crossfadeSubimageObserver);
-}
-
-String CSSCrossfadeValue::customCSSText() const
-{
-    StringBuilder result;
-    result.appendLiteral("-webkit-cross-fade(");
-    result.append(m_fromValue->cssText());
-    result.appendLiteral(", ");
-    result.append(m_toValue->cssText());
-    result.appendLiteral(", ");
-    result.append(m_percentageValue->cssText());
-    result.append(')');
-    return result.toString();
-}
-
-IntSize CSSCrossfadeValue::fixedSize(const RenderObject* renderer)
-{
-    float percentage = m_percentageValue->getFloatValue();
-    float inversePercentage = 1 - percentage;
-
-    ResourceFetcher* fetcher = renderer->document().fetcher();
-    ImageResource* cachedFromImage = cachedImageForCSSValue(m_fromValue.get(), fetcher);
-    ImageResource* cachedToImage = cachedImageForCSSValue(m_toValue.get(), fetcher);
-
-    if (!cachedFromImage || !cachedToImage)
-        return IntSize();
-
-    IntSize fromImageSize = cachedFromImage->imageForRenderer(renderer)->size();
-    IntSize toImageSize = cachedToImage->imageForRenderer(renderer)->size();
-
-    // Rounding issues can cause transitions between images of equal size to return
-    // a different fixed size; avoid performing the interpolation if the images are the same size.
-    if (fromImageSize == toImageSize)
-        return fromImageSize;
-
-    return IntSize(fromImageSize.width() * inversePercentage + toImageSize.width() * percentage,
-        fromImageSize.height() * inversePercentage + toImageSize.height() * percentage);
-}
-
-bool CSSCrossfadeValue::isPending() const
-{
-    return subimageIsPending(m_fromValue.get()) || subimageIsPending(m_toValue.get());
-}
-
-bool CSSCrossfadeValue::knownToBeOpaque(const RenderObject* renderer) const
-{
-    return subimageKnownToBeOpaque(m_fromValue.get(), renderer) && subimageKnownToBeOpaque(m_toValue.get(), renderer);
-}
-
-void CSSCrossfadeValue::loadSubimages(ResourceFetcher* fetcher)
-{
-    ResourcePtr<ImageResource> oldCachedFromImage = m_cachedFromImage;
-    ResourcePtr<ImageResource> oldCachedToImage = m_cachedToImage;
-
-    m_cachedFromImage = cachedImageForCSSValue(m_fromValue.get(), fetcher);
-    m_cachedToImage = cachedImageForCSSValue(m_toValue.get(), fetcher);
-
-    if (m_cachedFromImage != oldCachedFromImage) {
-        if (oldCachedFromImage)
-            oldCachedFromImage->removeClient(&m_crossfadeSubimageObserver);
-        if (m_cachedFromImage)
-            m_cachedFromImage->addClient(&m_crossfadeSubimageObserver);
-    }
-
-    if (m_cachedToImage != oldCachedToImage) {
-        if (oldCachedToImage)
-            oldCachedToImage->removeClient(&m_crossfadeSubimageObserver);
-        if (m_cachedToImage)
-            m_cachedToImage->addClient(&m_crossfadeSubimageObserver);
-    }
-
-    m_crossfadeSubimageObserver.setReady(true);
-}
-
-PassRefPtr<Image> CSSCrossfadeValue::image(RenderObject* renderer, const IntSize& size)
-{
-    if (size.isEmpty())
-        return nullptr;
-
-    ResourceFetcher* fetcher = renderer->document().fetcher();
-    ImageResource* cachedFromImage = cachedImageForCSSValue(m_fromValue.get(), fetcher);
-    ImageResource* cachedToImage = cachedImageForCSSValue(m_toValue.get(), fetcher);
-
-    if (!cachedFromImage || !cachedToImage)
-        return Image::nullImage();
-
-    Image* fromImage = cachedFromImage->imageForRenderer(renderer);
-    Image* toImage = cachedToImage->imageForRenderer(renderer);
-
-    if (!fromImage || !toImage)
-        return Image::nullImage();
-
-    m_generatedImage = CrossfadeGeneratedImage::create(fromImage, toImage, m_percentageValue->getFloatValue(), fixedSize(renderer), size);
-
-    return m_generatedImage.release();
-}
-
-void CSSCrossfadeValue::crossfadeChanged(const IntRect&)
-{
-    RenderObjectSizeCountMap::const_iterator end = clients().end();
-    for (RenderObjectSizeCountMap::const_iterator curr = clients().begin(); curr != end; ++curr) {
-        RenderObject* client = const_cast<RenderObject*>(curr->key);
-        client->imageChanged(static_cast<WrappedImagePtr>(this));
-    }
-}
-
-void CSSCrossfadeValue::CrossfadeSubimageObserverProxy::imageChanged(ImageResource*, const IntRect* rect)
-{
-    if (m_ready)
-        m_ownerValue->crossfadeChanged(*rect);
-}
-
-bool CSSCrossfadeValue::equals(const CSSCrossfadeValue& other) const
-{
-    return compareCSSValuePtr(m_fromValue, other.m_fromValue)
-        && compareCSSValuePtr(m_toValue, other.m_toValue)
-        && compareCSSValuePtr(m_percentageValue, other.m_percentageValue);
-}
-
-} // namespace blink