| /* |
| * 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/ColorSpace.h" |
| #include "core/platform/graphics/FloatRect.h" |
| #include "core/platform/graphics/GraphicsContext.h" |
| #include "core/platform/graphics/GraphicsTypes.h" |
| #include "core/platform/graphics/GraphicsTypes3D.h" |
| #include "core/platform/graphics/IntSize.h" |
| #include "core/platform/graphics/chromium/Canvas2DLayerBridge.h" |
| #include "core/platform/graphics/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 WebKit { class WebLayer; } |
| |
| namespace WebCore { |
| |
| class Image; |
| class ImageData; |
| 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. |
| Accelerated |
| }; |
| |
| 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) |
| { |
| bool success = false; |
| OwnPtr<ImageBuffer> buf = adoptPtr(new ImageBuffer(size, resolutionScale, renderingMode, opacityMode, success)); |
| if (!success) |
| return nullptr; |
| return buf.release(); |
| } |
| |
| static PassOwnPtr<ImageBuffer> createCompatibleBuffer(const IntSize&, float resolutionScale, const GraphicsContext*, bool hasAlpha); |
| |
| ~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); |
| WebKit::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); |
| |
| private: |
| bool isValid() const; |
| |
| void draw(GraphicsContext*, const FloatRect&, const FloatRect& = FloatRect(0, 0, -1, -1), CompositeOperator = CompositeSourceOver, BlendMode = BlendModeNormal, bool useLowQualityScale = false); |
| void drawPattern(GraphicsContext*, const FloatRect&, const FloatSize&, const FloatPoint&, CompositeOperator, const FloatRect&, BlendMode); |
| static PassRefPtr<SkColorFilter> createColorSpaceFilter(ColorSpace srcColorSpace, ColorSpace dstColorSpace); |
| |
| friend class GraphicsContext; |
| friend class GeneratedImage; |
| friend class CrossfadeGeneratedImage; |
| friend class GeneratorGeneratedImage; |
| 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, bool& success); |
| ImageBuffer(const IntSize&, float resolutionScale, const GraphicsContext*, bool hasAlpha, bool& success); |
| }; |
| |
| String ImageDataToDataURL(const ImageData&, const String& mimeType, const double* quality); |
| |
| } // namespace WebCore |
| |
| #endif // ImageBuffer_h |