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diff --git a/WebCore/platform/graphics/skia/ImageBufferSkia.cpp b/WebCore/platform/graphics/skia/ImageBufferSkia.cpp
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+++ b/WebCore/platform/graphics/skia/ImageBufferSkia.cpp
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+/*
+ * Copyright (c) 2008, Google 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:
+ * 
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * 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.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "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 THE COPYRIGHT
+ * OWNER 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 "ImageBuffer.h"
+
+#include "BitmapImage.h"
+#include "BitmapImageSingleFrameSkia.h"
+#include "GraphicsContext.h"
+#include "ImageData.h"
+#include "NotImplemented.h"
+#include "PlatformContextSkia.h"
+#include "SkiaUtils.h"
+
+using namespace std;
+
+namespace WebCore {
+
+// We pass a technically-uninitialized canvas to the platform context here since
+// the canvas initialization completes in ImageBuffer::ImageBuffer. But
+// PlatformContext doesn't actually need to use the object, and this makes all
+// the ownership easier to manage.
+ImageBufferData::ImageBufferData(const IntSize& size)
+    : m_platformContext(0)  // Canvas is set in ImageBuffer constructor.
+{
+}
+
+ImageBuffer::ImageBuffer(const IntSize& size, bool grayScale, bool& success)
+    : m_data(size)
+    , m_size(size)
+{
+    if (!m_data.m_canvas.initialize(size.width(), size.height(), false)) {
+        success = false;
+        return;
+    }
+
+    m_data.m_platformContext.setCanvas(&m_data.m_canvas);
+    m_context.set(new GraphicsContext(&m_data.m_platformContext));
+
+    // Make the background transparent. It would be nice if this wasn't
+    // required, but the canvas is currently filled with the magic transparency
+    // color. Can we have another way to manage this?
+    m_data.m_canvas.drawARGB(0, 0, 0, 0, SkPorterDuff::kClear_Mode);
+    success = true;
+}
+
+ImageBuffer::~ImageBuffer()
+{
+}
+
+GraphicsContext* ImageBuffer::context() const
+{
+    return m_context.get();
+}
+
+Image* ImageBuffer::image() const
+{
+    if (!m_image) {
+        // This creates a COPY of the image and will cache that copy. This means
+        // that if subsequent operations take place on the context, neither the
+        // currently-returned image, nor the results of future image() calls,
+        // will contain that operation.
+        //
+        // This seems silly, but is the way the CG port works: image() is
+        // intended to be used only when rendering is "complete."
+        m_image = BitmapImageSingleFrameSkia::create(
+            *m_data.m_platformContext.bitmap());
+    }
+    return m_image.get();
+}
+
+PassRefPtr<ImageData> ImageBuffer::getImageData(const IntRect& rect) const
+{
+    ASSERT(context());
+
+    RefPtr<ImageData> result = ImageData::create(rect.width(), rect.height());
+    unsigned char* data = result->data()->data();
+
+    if (rect.x() < 0 || rect.y() < 0 ||
+        (rect.x() + rect.width()) > m_size.width() ||
+        (rect.y() + rect.height()) > m_size.height())
+        memset(data, 0, result->data()->length());
+
+    int originX = rect.x();
+    int destX = 0;
+    if (originX < 0) {
+        destX = -originX;
+        originX = 0;
+    }
+    int endX = rect.x() + rect.width();
+    if (endX > m_size.width())
+        endX = m_size.width();
+    int numColumns = endX - originX;
+
+    int originY = rect.y();
+    int destY = 0;
+    if (originY < 0) {
+        destY = -originY;
+        originY = 0;
+    }
+    int endY = rect.y() + rect.height();
+    if (endY > m_size.height())
+        endY = m_size.height();
+    int numRows = endY - originY;
+
+    const SkBitmap& bitmap = *context()->platformContext()->bitmap();
+    ASSERT(bitmap.config() == SkBitmap::kARGB_8888_Config);
+    SkAutoLockPixels bitmapLock(bitmap);
+
+    unsigned destBytesPerRow = 4 * rect.width();
+    unsigned char* destRow = data + destY * destBytesPerRow + destX * 4;
+
+    for (int y = 0; y < numRows; ++y) {
+        uint32_t* srcRow = bitmap.getAddr32(originX, originY + y);
+        for (int x = 0; x < numColumns; ++x) {
+            SkColor color = SkPMColorToColor(srcRow[x]);
+            unsigned char* destPixel = &destRow[x * 4];
+            destPixel[0] = SkColorGetR(color);
+            destPixel[1] = SkColorGetG(color);
+            destPixel[2] = SkColorGetB(color);
+            destPixel[3] = SkColorGetA(color);
+        }
+        destRow += destBytesPerRow;
+    }
+
+    return result;
+}
+
+void ImageBuffer::putImageData(ImageData* source, const IntRect& sourceRect,
+                               const IntPoint& destPoint)
+{
+    ASSERT(sourceRect.width() > 0);
+    ASSERT(sourceRect.height() > 0);
+
+    int originX = sourceRect.x();
+    int destX = destPoint.x() + sourceRect.x();
+    ASSERT(destX >= 0);
+    ASSERT(destX < m_size.width());
+    ASSERT(originX >= 0);
+    ASSERT(originX < sourceRect.right());
+
+    int endX = destPoint.x() + sourceRect.right();
+    ASSERT(endX <= m_size.width());
+
+    int numColumns = endX - destX;
+
+    int originY = sourceRect.y();
+    int destY = destPoint.y() + sourceRect.y();
+    ASSERT(destY >= 0);
+    ASSERT(destY < m_size.height());
+    ASSERT(originY >= 0);
+    ASSERT(originY < sourceRect.bottom());
+
+    int endY = destPoint.y() + sourceRect.bottom();
+    ASSERT(endY <= m_size.height());
+    int numRows = endY - destY;
+
+    const SkBitmap& bitmap = *context()->platformContext()->bitmap();
+    ASSERT(bitmap.config() == SkBitmap::kARGB_8888_Config);
+    SkAutoLockPixels bitmapLock(bitmap);
+
+    unsigned srcBytesPerRow = 4 * source->width();
+
+    const unsigned char* srcRow = source->data()->data() + originY * srcBytesPerRow + originX * 4;
+
+    for (int y = 0; y < numRows; ++y) {
+        uint32_t* destRow = bitmap.getAddr32(destX, destY + y);
+        for (int x = 0; x < numColumns; ++x) {
+            const unsigned char* srcPixel = &srcRow[x * 4];
+            destRow[x] = SkPreMultiplyARGB(srcPixel[3], srcPixel[0],
+                                           srcPixel[1], srcPixel[2]);
+        }
+        srcRow += srcBytesPerRow;
+    }
+}
+
+String ImageBuffer::toDataURL(const String&) const
+{
+    notImplemented();
+    return String();
+}
+
+} // namespace WebCore