Merge WebKit at r75315: Initial merge by git.

Change-Id: I570314b346ce101c935ed22a626b48c2af266b84

1 files changed, 132 insertions, 0 deletions

diff --git a/Source/WebCore/platform/graphics/ImageBuffer.h b/Source/WebCore/platform/graphics/ImageBuffer.h
new file mode 100644
index 0000000..338e3f8
--- /dev/null
+++ b/Source/WebCore/platform/graphics/ImageBuffer.h
@@ -0,0 +1,132 @@
+/*
+ * 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 "AffineTransform.h"
+#include "ColorSpace.h"
+#include "FloatRect.h"
+#include "Image.h"
+#include "IntSize.h"
+#include "ImageBufferData.h"
+#include <wtf/ByteArray.h>
+#include <wtf/Forward.h>
+#include <wtf/OwnPtr.h>
+#include <wtf/PassOwnPtr.h>
+#include <wtf/PassRefPtr.h>
+
+#if (PLATFORM(MAC) && PLATFORM(CA) && !defined(BUILDING_ON_TIGER) && !defined(BUILDING_ON_LEOPARD) && !defined(BUILDING_ON_SNOW_LEOPARD))
+#define WTF_USE_IOSURFACE_CANVAS_BACKING_STORE 1
+#endif
+
+namespace WebCore {
+
+    class GraphicsContext;
+    class ImageData;
+    class IntPoint;
+    class IntRect;
+
+    enum Multiply {
+        Premultiplied,
+        Unmultiplied
+    };
+
+    enum RenderingMode {
+        Unaccelerated,
+        Accelerated
+    };
+
+    class ImageBuffer : public Noncopyable {
+    public:
+        // Will return a null pointer on allocation failure.
+        static PassOwnPtr<ImageBuffer> create(const IntSize& size, ColorSpace colorSpace = ColorSpaceDeviceRGB, RenderingMode renderingMode = Unaccelerated)
+        {
+            bool success = false;
+            OwnPtr<ImageBuffer> buf(new ImageBuffer(size, colorSpace, renderingMode, success));
+            if (success)
+                return buf.release();
+            return 0;
+        }
+
+        ~ImageBuffer();
+
+        const IntSize& size() const { return m_size; }
+        int width() const { return m_size.width(); }
+        int height() const { return m_size.height(); }
+        
+        GraphicsContext* context() const;
+
+        bool drawsUsingCopy() const; // If the image buffer has to render using a copied image, it will return true.
+        PassRefPtr<Image> copyImage() const; // Return a new image that is a copy of the buffer.
+
+        PassRefPtr<ByteArray> getUnmultipliedImageData(const IntRect&) const;
+        PassRefPtr<ByteArray> getPremultipliedImageData(const IntRect&) const;
+
+        void putUnmultipliedImageData(ByteArray*, const IntSize& sourceSize, const IntRect& sourceRect, const IntPoint& destPoint);
+        void putPremultipliedImageData(ByteArray*, const IntSize& sourceSize, const IntRect& sourceRect, const IntPoint& destPoint);
+        
+        String toDataURL(const String& mimeType, const double* quality = 0) const;
+#if !PLATFORM(CG)
+        AffineTransform baseTransform() const { return AffineTransform(); }
+        void transformColorSpace(ColorSpace srcColorSpace, ColorSpace dstColorSpace);
+        void platformTransformColorSpace(const Vector<int>&);
+#else
+        AffineTransform baseTransform() const { return AffineTransform(1, 0, 0, -1, 0, m_size.height()); }
+#endif
+
+    private:
+        void clip(GraphicsContext*, const FloatRect&) const;
+
+        // The draw method draws the contents of the buffer without copying it.
+        void draw(GraphicsContext*, ColorSpace styleColorSpace, const FloatRect& destRect, const FloatRect& srcRect = FloatRect(0, 0, -1, -1),
+                             CompositeOperator = CompositeSourceOver, bool useLowQualityScale = false);
+        void drawPattern(GraphicsContext*, const FloatRect& srcRect, const AffineTransform& patternTransform,
+                         const FloatPoint& phase, ColorSpace styleColorSpace, CompositeOperator, const FloatRect& destRect);
+        friend class GraphicsContext;
+        friend class GeneratedImage;
+
+    private:
+        ImageBufferData m_data;
+
+        IntSize m_size;
+        bool m_accelerateRendering;
+        OwnPtr<GraphicsContext> m_context;
+
+#if !PLATFORM(CG)
+        Vector<int> m_linearRgbLUT;
+        Vector<int> m_deviceRgbLUT;
+#endif
+
+        // This constructor will place its success into the given out-variable
+        // so that create() knows when it should return failure.
+        ImageBuffer(const IntSize&, ColorSpace colorSpace, RenderingMode renderingMode, bool& success);
+    };
+
+} // namespace WebCore
+
+#endif // ImageBuffer_h