Moving GraphicsContext and dependencies from core to platform.

Source/core/platform/graphics/Image.cpp

Index: Source/core/platform/graphics/Image.cpp
diff --git a/Source/core/platform/graphics/Image.cpp b/Source/core/platform/graphics/Image.cpp
deleted file mode 100644
index 1720b6d8b4f3ec71ae9624f68d793a0f5aa7dca3..0000000000000000000000000000000000000000
--- a/Source/core/platform/graphics/Image.cpp
+++ /dev/null
@@ -1,240 +0,0 @@
-/*
- * Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
- * Copyright (C) 2004, 2005, 2006 Apple Computer, 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 "config.h"
-#include "core/platform/graphics/Image.h"
-
-#include "core/platform/graphics/BitmapImage.h"
-#include "core/platform/graphics/GraphicsContext.h"
-#include "core/platform/graphics/GraphicsContextStateSaver.h"
-#include "platform/Length.h"
-#include "platform/MIMETypeRegistry.h"
-#include "platform/SharedBuffer.h"
-#include "platform/TraceEvent.h"
-#include "platform/geometry/FloatPoint.h"
-#include "platform/geometry/FloatRect.h"
-#include "platform/geometry/FloatSize.h"
-#include "public/platform/Platform.h"
-#include "public/platform/WebData.h"
-#include "wtf/MainThread.h"
-#include "wtf/StdLibExtras.h"
-
-#include <math.h>
-
-namespace WebCore {
-
-Image::Image(ImageObserver* observer)
-    : m_imageObserver(observer)
-{
-}
-
-Image::~Image()
-{
-}
-
-Image* Image::nullImage()
-{
-    ASSERT(isMainThread());
-    DEFINE_STATIC_REF(Image, nullImage, (BitmapImage::create()));
-    return nullImage;
-}
-
-PassRefPtr<Image> Image::loadPlatformResource(const char *name)
-{
-    const blink::WebData& resource = blink::Platform::current()->loadResource(name);
-    if (resource.isEmpty())
-        return Image::nullImage();
-
-    RefPtr<Image> image = BitmapImage::create();
-    image->setData(resource, true);
-    return image.release();
-}
-
-bool Image::supportsType(const String& type)
-{
-    return MIMETypeRegistry::isSupportedImageResourceMIMEType(type);
-}
-
-bool Image::setData(PassRefPtr<SharedBuffer> data, bool allDataReceived)
-{
-    m_encodedImageData = data;
-    if (!m_encodedImageData.get())
-        return true;
-
-    int length = m_encodedImageData->size();
-    if (!length)
-        return true;
-
-    return dataChanged(allDataReceived);
-}
-
-void Image::fillWithSolidColor(GraphicsContext* ctxt, const FloatRect& dstRect, const Color& color, CompositeOperator op)
-{
-    if (!color.alpha())
-        return;
-
-    CompositeOperator previousOperator = ctxt->compositeOperation();
-    ctxt->setCompositeOperation(!color.hasAlpha() && op == CompositeSourceOver ? CompositeCopy : op);
-    ctxt->fillRect(dstRect, color);
-    ctxt->setCompositeOperation(previousOperator);
-}
-
-FloatRect Image::adjustForNegativeSize(const FloatRect& rect)
-{
-    FloatRect norm = rect;
-    if (norm.width() < 0) {
-        norm.setX(norm.x() + norm.width());
-        norm.setWidth(-norm.width());
-    }
-    if (norm.height() < 0) {
-        norm.setY(norm.y() + norm.height());
-        norm.setHeight(-norm.height());
-    }
-    return norm;
-}
-
-void Image::draw(GraphicsContext* ctx, const FloatRect& dstRect, const FloatRect& srcRect, CompositeOperator op, blink::WebBlendMode blendMode, RespectImageOrientationEnum)
-{
-    draw(ctx, dstRect, srcRect, op, blendMode);
-}
-
-void Image::drawTiled(GraphicsContext* ctxt, const FloatRect& destRect, const FloatPoint& srcPoint, const FloatSize& scaledTileSize, CompositeOperator op, blink::WebBlendMode blendMode, const IntSize& repeatSpacing)
-{
-    if (mayFillWithSolidColor()) {
-        fillWithSolidColor(ctxt, destRect, solidColor(), op);
-        return;
-    }
-
-    // See <https://webkit.org/b/59043>.
-    ASSERT(!isBitmapImage() || notSolidColor());
-
-    FloatSize intrinsicTileSize = size();
-    if (hasRelativeWidth())
-        intrinsicTileSize.setWidth(scaledTileSize.width());
-    if (hasRelativeHeight())
-        intrinsicTileSize.setHeight(scaledTileSize.height());
-
-    FloatSize scale(scaledTileSize.width() / intrinsicTileSize.width(),
-                    scaledTileSize.height() / intrinsicTileSize.height());
-
-    FloatSize actualTileSize(scaledTileSize.width() + repeatSpacing.width(), scaledTileSize.height() + repeatSpacing.height());
-    FloatRect oneTileRect;
-    oneTileRect.setX(destRect.x() + fmodf(fmodf(-srcPoint.x(), actualTileSize.width()) - actualTileSize.width(), actualTileSize.width()));
-    oneTileRect.setY(destRect.y() + fmodf(fmodf(-srcPoint.y(), actualTileSize.height()) - actualTileSize.height(), actualTileSize.height()));
-    oneTileRect.setSize(scaledTileSize);
-
-    // Check and see if a single draw of the image can cover the entire area we are supposed to tile.
-    if (oneTileRect.contains(destRect)) {
-        FloatRect visibleSrcRect;
-        visibleSrcRect.setX((destRect.x() - oneTileRect.x()) / scale.width());
-        visibleSrcRect.setY((destRect.y() - oneTileRect.y()) / scale.height());
-        visibleSrcRect.setWidth(destRect.width() / scale.width());
-        visibleSrcRect.setHeight(destRect.height() / scale.height());
-        draw(ctxt, destRect, visibleSrcRect, op, blendMode);
-        return;
-    }
-
-    FloatRect tileRect(FloatPoint(), intrinsicTileSize);
-    drawPattern(ctxt, tileRect, scale, oneTileRect.location(), op, destRect, blendMode, repeatSpacing);
-
-    startAnimation();
-}
-
-// FIXME: Merge with the other drawTiled eventually, since we need a combination of both for some things.
-void Image::drawTiled(GraphicsContext* ctxt, const FloatRect& dstRect, const FloatRect& srcRect,
-    const FloatSize& providedTileScaleFactor, TileRule hRule, TileRule vRule, CompositeOperator op)
-{
-    if (mayFillWithSolidColor()) {
-        fillWithSolidColor(ctxt, dstRect, solidColor(), op);
-        return;
-    }
-
-    // FIXME: We do not support 'space' yet. For now just map it to 'repeat'.
-    if (hRule == SpaceTile)
-        hRule = RepeatTile;
-    if (vRule == SpaceTile)
-        vRule = RepeatTile;
-
-    // FIXME: if this code is used for background-repeat: round (in addition to
-    // border-image-repeat), then add logic to deal with the background-size: auto
-    // special case. The aspect ratio should be maintained in this case.
-    FloatSize tileScaleFactor = providedTileScaleFactor;
-    bool useLowInterpolationQuality = false;
-    if (hRule == RoundTile) {
-        float hRepetitions = std::max(1.0f, roundf(dstRect.width() / (tileScaleFactor.width() * srcRect.width())));
-        tileScaleFactor.setWidth(dstRect.width() / (srcRect.width() * hRepetitions));
-    }
-    if (vRule == RoundTile) {
-        float vRepetitions = std::max(1.0f, roundf(dstRect.height() / (tileScaleFactor.height() * srcRect.height())));
-        tileScaleFactor.setHeight(dstRect.height() / (srcRect.height() * vRepetitions));
-    }
-    if (hRule == RoundTile || vRule == RoundTile) {
-        // High interpolation quality rounds the scaled tile to an integer size (see Image::drawPattern).
-        // To avoid causing a visual problem, linear interpolation must be used instead.
-        // FIXME: Allow using high-quality interpolation in this case, too.
-        useLowInterpolationQuality = true;
-    }
-
-    // We want to construct the phase such that the pattern is centered (when stretch is not
-    // set for a particular rule).
-    float hPhase = tileScaleFactor.width() * srcRect.x();
-    float vPhase = tileScaleFactor.height() * srcRect.y();
-    float scaledTileWidth = tileScaleFactor.width() * srcRect.width();
-    float scaledTileHeight = tileScaleFactor.height() * srcRect.height();
-    if (hRule == Image::RepeatTile)
-        hPhase -= (dstRect.width() - scaledTileWidth) / 2;
-    if (vRule == Image::RepeatTile)
-        vPhase -= (dstRect.height() - scaledTileHeight) / 2;
-    FloatPoint patternPhase(dstRect.x() - hPhase, dstRect.y() - vPhase);
-
-    if (useLowInterpolationQuality) {
-        InterpolationQuality previousInterpolationQuality = ctxt->imageInterpolationQuality();
-        ctxt->setImageInterpolationQuality(InterpolationLow);
-        drawPattern(ctxt, srcRect, tileScaleFactor, patternPhase, op, dstRect);
-        ctxt->setImageInterpolationQuality(previousInterpolationQuality);
-    } else {
-        drawPattern(ctxt, srcRect, tileScaleFactor, patternPhase, op, dstRect);
-    }
-
-    startAnimation();
-}
-
-void Image::drawPattern(GraphicsContext* context, const FloatRect& floatSrcRect, const FloatSize& scale,
-    const FloatPoint& phase, CompositeOperator compositeOp, const FloatRect& destRect, blink::WebBlendMode blendMode, const IntSize& repeatSpacing)
-{
-    TRACE_EVENT0("skia", "Image::drawPattern");
-    if (RefPtr<NativeImageSkia> bitmap = nativeImageForCurrentFrame())
-        bitmap->drawPattern(context, adjustForNegativeSize(floatSrcRect), scale, phase, compositeOp, destRect, blendMode, repeatSpacing);
-}
-
-void Image::computeIntrinsicDimensions(Length& intrinsicWidth, Length& intrinsicHeight, FloatSize& intrinsicRatio)
-{
-    intrinsicRatio = size();
-    intrinsicWidth = Length(intrinsicRatio.width(), Fixed);
-    intrinsicHeight = Length(intrinsicRatio.height(), Fixed);
-}
-
-}