Moving GraphicsContext and dependencies from core to platform.

Source/core/platform/graphics/ImageBuffer.h

-/*
- * Copyright (C) 2006 Nikolas Zimmermann <zimmermann@kde.org>
- * Copyright (C) 2007, 2008, 2009 Apple Inc. All rights reserved.
- * Copyright (C) 2010 Torch Mobile (Beijing) Co. Ltd. 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.
- */
-
-#ifndef ImageBuffer_h
-#define ImageBuffer_h
-
-#include "core/platform/graphics/GraphicsContext.h"
-#include "core/platform/graphics/Canvas2DLayerBridge.h"
-#include "platform/geometry/FloatRect.h"
-#include "platform/geometry/IntSize.h"
-#include "platform/graphics/ColorSpace.h"
-#include "platform/graphics/GraphicsTypes.h"
-#include "platform/graphics/GraphicsTypes3D.h"
-#include "platform/transforms/AffineTransform.h"
-#include "wtf/Forward.h"
-#include "wtf/OwnPtr.h"
-#include "wtf/PassOwnPtr.h"
-#include "wtf/PassRefPtr.h"
-#include "wtf/Uint8ClampedArray.h"
-#include "wtf/Vector.h"
-
-class SkCanvas;
-
-namespace blink { class WebLayer; }
-
-namespace WebCore {
-
-class Image;
-class IntPoint;
-class IntRect;
-class GraphicsContext3D;
-
-enum Multiply {
-    Premultiplied,
-    Unmultiplied
-};
-
-enum RenderingMode {
-    Unaccelerated,
-    UnacceleratedNonPlatformBuffer, // Use plain memory allocation rather than platform API to allocate backing store.
-    TextureBacked, // Allocate a texture-based SkBitmap for the backing store.
-    Accelerated, // Besides a texture-based SkBitmap for the backing store, allocate Canvas2DLayerBridge, etc as well for 2D Canvas drawing.
-};
-
-enum BackingStoreCopy {
-    CopyBackingStore, // Guarantee subsequent draws don't affect the copy.
-    DontCopyBackingStore // Subsequent draws may affect the copy.
-};
-
-enum ScaleBehavior {
-    Scaled,
-    Unscaled
-};
-
-enum OpacityMode {
-    NonOpaque,
-    Opaque,
-};
-
-class ImageBuffer {
-    WTF_MAKE_NONCOPYABLE(ImageBuffer); WTF_MAKE_FAST_ALLOCATED;
-public:
-    // Will return a null pointer on allocation failure.
-    static PassOwnPtr<ImageBuffer> create(const IntSize& size, float resolutionScale = 1, RenderingMode renderingMode = Unaccelerated, OpacityMode opacityMode = NonOpaque, int acceleratedMSAASampleCount = 0)
-    {
-        bool success = false;
-        OwnPtr<ImageBuffer> buf = adoptPtr(new ImageBuffer(size, resolutionScale, renderingMode, opacityMode, acceleratedMSAASampleCount, success));
-        if (!success)
-            return nullptr;
-        return buf.release();
-    }
-
-    static PassOwnPtr<ImageBuffer> createCompatibleBuffer(const IntSize&, float resolutionScale, const GraphicsContext*, bool hasAlpha);
-
-    // Tiles may need float-to-integer coordinate mapping.
-    static PassOwnPtr<ImageBuffer> createBufferForTile(const FloatSize& tileSize, const FloatSize& clampedTileSize, RenderingMode);
-
-    ~ImageBuffer();
-
-    // The actual resolution of the backing store
-    const IntSize& internalSize() const { return m_size; }
-    const IntSize& logicalSize() const { return m_logicalSize; }
-
-    GraphicsContext* context() const;
-
-    PassRefPtr<Image> copyImage(BackingStoreCopy = CopyBackingStore, ScaleBehavior = Scaled) const;
-    // Give hints on the faster copyImage Mode, return DontCopyBackingStore if it supports the DontCopyBackingStore behavior
-    // or return CopyBackingStore if it doesn't.
-    static BackingStoreCopy fastCopyImageMode();
-
-    enum CoordinateSystem { LogicalCoordinateSystem, BackingStoreCoordinateSystem };
-
-    PassRefPtr<Uint8ClampedArray> getUnmultipliedImageData(const IntRect&, CoordinateSystem = LogicalCoordinateSystem) const;
-    PassRefPtr<Uint8ClampedArray> getPremultipliedImageData(const IntRect&, CoordinateSystem = LogicalCoordinateSystem) const;
-
-    void putByteArray(Multiply multiplied, Uint8ClampedArray*, const IntSize& sourceSize, const IntRect& sourceRect, const IntPoint& destPoint, CoordinateSystem = LogicalCoordinateSystem);
-
-    String toDataURL(const String& mimeType, const double* quality = 0, CoordinateSystem = LogicalCoordinateSystem) const;
-    AffineTransform baseTransform() const { return AffineTransform(); }
-    void transformColorSpace(ColorSpace srcColorSpace, ColorSpace dstColorSpace);
-    blink::WebLayer* platformLayer() const;
-
-    // FIXME: current implementations of this method have the restriction that they only work
-    // with textures that are RGB or RGBA format, UNSIGNED_BYTE type and level 0, as specified in
-    // Extensions3D::canUseCopyTextureCHROMIUM().
-    bool copyToPlatformTexture(GraphicsContext3D&, Platform3DObject, GC3Denum, GC3Denum, GC3Dint, bool, bool);
-
-    Platform3DObject getBackingTexture();
-    bool copyRenderingResultsFromDrawingBuffer(DrawingBuffer*);
-
-private:
-    bool isValid() const;
-
-    void draw(GraphicsContext*, const FloatRect&, const FloatRect& = FloatRect(0, 0, -1, -1), CompositeOperator = CompositeSourceOver, blink::WebBlendMode = blink::WebBlendModeNormal, bool useLowQualityScale = false);
-    void drawPattern(GraphicsContext*, const FloatRect&, const FloatSize&, const FloatPoint&, CompositeOperator, const FloatRect&, blink::WebBlendMode, const IntSize& repeatSpacing = IntSize());
-    static PassRefPtr<SkColorFilter> createColorSpaceFilter(ColorSpace srcColorSpace, ColorSpace dstColorSpace);
-
-    friend class GraphicsContext;
-    friend class GeneratedImage;
-    friend class CrossfadeGeneratedImage;
-    friend class GradientGeneratedImage;
-    friend class SkiaImageFilterBuilder;
-
-    IntSize m_size;
-    IntSize m_logicalSize;
-    float m_resolutionScale;
-    RefPtr<SkCanvas> m_canvas;
-    OwnPtr<GraphicsContext> m_context;
-    Canvas2DLayerBridgePtr m_layerBridge;
-
-    // This constructor will place its success into the given out-variable
-    // so that create() knows when it should return failure.
-    ImageBuffer(const IntSize&, float resolutionScale, RenderingMode, OpacityMode, int acceleratedSampleCount, bool& success);
-    ImageBuffer(const IntSize&, float resolutionScale, const GraphicsContext*, bool hasAlpha, bool& success);
-};
-
-struct ImageDataBuffer {
-    ImageDataBuffer(const IntSize& size, PassRefPtr<Uint8ClampedArray> data) : m_size(size), m_data(data) { }
-    IntSize size() const { return m_size; }
-    unsigned char* data() const { return m_data->data(); }
-
-    IntSize m_size;
-    RefPtr<Uint8ClampedArray> m_data;
-};
-
-String ImageDataToDataURL(const ImageDataBuffer&, const String& mimeType, const double* quality);
-
-} // namespace WebCore
-
-#endif // ImageBuffer_h