Merge WebKit at r75315: Initial merge by git.

Change-Id: I570314b346ce101c935ed22a626b48c2af266b84

1 files changed, 319 insertions, 0 deletions

diff --git a/Source/WebCore/platform/graphics/cairo/ImageBufferCairo.cpp b/Source/WebCore/platform/graphics/cairo/ImageBufferCairo.cpp
new file mode 100644
index 0000000..ac5da3d
--- /dev/null
+++ b/Source/WebCore/platform/graphics/cairo/ImageBufferCairo.cpp
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+/*
+ * Copyright (C) 2006 Nikolas Zimmermann <zimmermann@kde.org>
+ * Copyright (C) 2007 Holger Hans Peter Freyther <zecke@selfish.org>
+ * Copyright (C) 2008, 2009 Dirk Schulze <krit@webkit.org>
+ * 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.
+ */
+
+#include "config.h"
+#include "ImageBuffer.h"
+
+#include "Base64.h"
+#include "BitmapImage.h"
+#include "Color.h"
+#include "GraphicsContext.h"
+#include "ImageData.h"
+#include "MIMETypeRegistry.h"
+#include "NotImplemented.h"
+#include "Pattern.h"
+#include "PlatformString.h"
+#include <cairo.h>
+#include <wtf/Vector.h>
+
+using namespace std;
+
+// Cairo doesn't provide a way to copy a cairo_surface_t.
+// See http://lists.cairographics.org/archives/cairo/2007-June/010877.html
+// Once cairo provides the way, use the function instead of this.
+static inline cairo_surface_t* copySurface(cairo_surface_t* surface)
+{
+    cairo_format_t format = cairo_image_surface_get_format(surface);
+    int width = cairo_image_surface_get_width(surface);
+    int height = cairo_image_surface_get_height(surface);
+    cairo_surface_t* newsurface = cairo_image_surface_create(format, width, height);
+
+    cairo_t* cr = cairo_create(newsurface);
+    cairo_set_source_surface(cr, surface, 0, 0);
+    cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
+    cairo_paint(cr);
+    cairo_destroy(cr);
+
+    return newsurface;
+}
+
+namespace WebCore {
+
+ImageBufferData::ImageBufferData(const IntSize& size)
+    : m_surface(0)
+{
+}
+
+ImageBuffer::ImageBuffer(const IntSize& size, ColorSpace, RenderingMode, bool& success)
+    : m_data(size)
+    , m_size(size)
+{
+    success = false;  // Make early return mean error.
+    m_data.m_surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32,
+                                                  size.width(),
+                                                  size.height());
+    if (cairo_surface_status(m_data.m_surface) != CAIRO_STATUS_SUCCESS)
+        return;  // create will notice we didn't set m_initialized and fail.
+
+    cairo_t* cr = cairo_create(m_data.m_surface);
+    m_context.set(new GraphicsContext(cr));
+    cairo_destroy(cr);  // The context is now owned by the GraphicsContext.
+    success = true;
+}
+
+ImageBuffer::~ImageBuffer()
+{
+    cairo_surface_destroy(m_data.m_surface);
+}
+
+GraphicsContext* ImageBuffer::context() const
+{
+    return m_context.get();
+}
+
+bool ImageBuffer::drawsUsingCopy() const
+{
+    return false;
+}
+
+PassRefPtr<Image> ImageBuffer::copyImage() const
+{
+    // BitmapImage will release the passed in surface on destruction
+    return BitmapImage::create(copySurface(m_data.m_surface));
+}
+
+void ImageBuffer::clip(GraphicsContext*, const FloatRect&) const
+{
+    notImplemented();
+    // See https://bugs.webkit.org/show_bug.cgi?id=23526 for why this is unimplemented.
+}
+
+void ImageBuffer::draw(GraphicsContext* context, ColorSpace styleColorSpace, const FloatRect& destRect, const FloatRect& srcRect,
+                       CompositeOperator op , bool useLowQualityScale)
+{
+    // BitmapImage will release the passed in surface on destruction
+    RefPtr<Image> image = BitmapImage::create(cairo_surface_reference(m_data.m_surface));
+    context->drawImage(image.get(), styleColorSpace, destRect, srcRect, op, useLowQualityScale);
+}
+
+void ImageBuffer::drawPattern(GraphicsContext* context, const FloatRect& srcRect, const AffineTransform& patternTransform,
+                              const FloatPoint& phase, ColorSpace styleColorSpace, CompositeOperator op, const FloatRect& destRect)
+{
+    // BitmapImage will release the passed in surface on destruction
+    RefPtr<Image> image = BitmapImage::create(cairo_surface_reference(m_data.m_surface));
+    image->drawPattern(context, srcRect, patternTransform, phase, styleColorSpace, op, destRect);
+}
+
+void ImageBuffer::platformTransformColorSpace(const Vector<int>& lookUpTable)
+{
+    ASSERT(cairo_surface_get_type(m_data.m_surface) == CAIRO_SURFACE_TYPE_IMAGE);
+
+    unsigned char* dataSrc = cairo_image_surface_get_data(m_data.m_surface);
+    int stride = cairo_image_surface_get_stride(m_data.m_surface);
+    for (int y = 0; y < m_size.height(); ++y) {
+        unsigned* row = reinterpret_cast<unsigned*>(dataSrc + stride * y);
+        for (int x = 0; x < m_size.width(); x++) {
+            unsigned* pixel = row + x;
+            Color pixelColor = colorFromPremultipliedARGB(*pixel);
+            pixelColor = Color(lookUpTable[pixelColor.red()],
+                               lookUpTable[pixelColor.green()],
+                               lookUpTable[pixelColor.blue()],
+                               pixelColor.alpha());
+            *pixel = premultipliedARGBFromColor(pixelColor);
+        }
+    }
+    cairo_surface_mark_dirty_rectangle (m_data.m_surface, 0, 0, m_size.width(), m_size.height());
+}
+
+template <Multiply multiplied>
+PassRefPtr<ByteArray> getImageData(const IntRect& rect, const ImageBufferData& data, const IntSize& size)
+{
+    ASSERT(cairo_surface_get_type(data.m_surface) == CAIRO_SURFACE_TYPE_IMAGE);
+
+    RefPtr<ByteArray> result = ByteArray::create(rect.width() * rect.height() * 4);
+    unsigned char* dataSrc = cairo_image_surface_get_data(data.m_surface);
+    unsigned char* dataDst = result->data();
+
+    if (rect.x() < 0 || rect.y() < 0 || (rect.x() + rect.width()) > size.width() || (rect.y() + rect.height()) > size.height())
+        memset(dataDst, 0, result->length());
+
+    int originx = rect.x();
+    int destx = 0;
+    if (originx < 0) {
+        destx = -originx;
+        originx = 0;
+    }
+    int endx = rect.right();
+    if (endx > size.width())
+        endx = size.width();
+    int numColumns = endx - originx;
+
+    int originy = rect.y();
+    int desty = 0;
+    if (originy < 0) {
+        desty = -originy;
+        originy = 0;
+    }
+    int endy = rect.bottom();
+    if (endy > size.height())
+        endy = size.height();
+    int numRows = endy - originy;
+
+    int stride = cairo_image_surface_get_stride(data.m_surface);
+    unsigned destBytesPerRow = 4 * rect.width();
+
+    unsigned char* destRows = dataDst + desty * destBytesPerRow + destx * 4;
+    for (int y = 0; y < numRows; ++y) {
+        unsigned* row = reinterpret_cast<unsigned*>(dataSrc + stride * (y + originy));
+        for (int x = 0; x < numColumns; x++) {
+            int basex = x * 4;
+            unsigned* pixel = row + x + originx;
+            Color pixelColor;
+            if (multiplied == Unmultiplied)
+                pixelColor = colorFromPremultipliedARGB(*pixel);
+            else
+                pixelColor = Color(*pixel);
+            destRows[basex]     = pixelColor.red();
+            destRows[basex + 1] = pixelColor.green();
+            destRows[basex + 2] = pixelColor.blue();
+            destRows[basex + 3] = pixelColor.alpha();
+        }
+        destRows += destBytesPerRow;
+    }
+
+    return result.release();
+}
+
+PassRefPtr<ByteArray> ImageBuffer::getUnmultipliedImageData(const IntRect& rect) const
+{
+    return getImageData<Unmultiplied>(rect, m_data, m_size);
+}
+
+PassRefPtr<ByteArray> ImageBuffer::getPremultipliedImageData(const IntRect& rect) const
+{
+    return getImageData<Premultiplied>(rect, m_data, m_size);
+}
+
+template <Multiply multiplied>
+void putImageData(ByteArray*& source, const IntSize& sourceSize, const IntRect& sourceRect, const IntPoint& destPoint, ImageBufferData& data, const IntSize& size)
+{
+    ASSERT(cairo_surface_get_type(data.m_surface) == CAIRO_SURFACE_TYPE_IMAGE);
+
+    unsigned char* dataDst = cairo_image_surface_get_data(data.m_surface);
+
+    ASSERT(sourceRect.width() > 0);
+    ASSERT(sourceRect.height() > 0);
+
+    int originx = sourceRect.x();
+    int destx = destPoint.x() + sourceRect.x();
+    ASSERT(destx >= 0);
+    ASSERT(destx < size.width());
+    ASSERT(originx >= 0);
+    ASSERT(originx <= sourceRect.right());
+
+    int endx = destPoint.x() + sourceRect.right();
+    ASSERT(endx <= size.width());
+
+    int numColumns = endx - destx;
+
+    int originy = sourceRect.y();
+    int desty = destPoint.y() + sourceRect.y();
+    ASSERT(desty >= 0);
+    ASSERT(desty < size.height());
+    ASSERT(originy >= 0);
+    ASSERT(originy <= sourceRect.bottom());
+
+    int endy = destPoint.y() + sourceRect.bottom();
+    ASSERT(endy <= size.height());
+    int numRows = endy - desty;
+
+    unsigned srcBytesPerRow = 4 * sourceSize.width();
+    int stride = cairo_image_surface_get_stride(data.m_surface);
+
+    unsigned char* srcRows = source->data() + originy * srcBytesPerRow + originx * 4;
+    for (int y = 0; y < numRows; ++y) {
+        unsigned* row = reinterpret_cast<unsigned*>(dataDst + stride * (y + desty));
+        for (int x = 0; x < numColumns; x++) {
+            int basex = x * 4;
+            unsigned* pixel = row + x + destx;
+            Color pixelColor(srcRows[basex],
+                    srcRows[basex + 1],
+                    srcRows[basex + 2],
+                    srcRows[basex + 3]);
+            if (multiplied == Unmultiplied)
+                *pixel = premultipliedARGBFromColor(pixelColor);
+            else
+                *pixel = pixelColor.rgb();
+        }
+        srcRows += srcBytesPerRow;
+    }
+    cairo_surface_mark_dirty_rectangle (data.m_surface,
+                                        destx, desty,
+                                        numColumns, numRows);
+}
+
+void ImageBuffer::putUnmultipliedImageData(ByteArray* source, const IntSize& sourceSize, const IntRect& sourceRect, const IntPoint& destPoint)
+{
+    putImageData<Unmultiplied>(source, sourceSize, sourceRect, destPoint, m_data, m_size);
+}
+
+void ImageBuffer::putPremultipliedImageData(ByteArray* source, const IntSize& sourceSize, const IntRect& sourceRect, const IntPoint& destPoint)
+{
+    putImageData<Premultiplied>(source, sourceSize, sourceRect, destPoint, m_data, m_size);
+}
+
+#if !PLATFORM(GTK)
+static cairo_status_t writeFunction(void* closure, const unsigned char* data, unsigned int length)
+{
+    Vector<char>* in = reinterpret_cast<Vector<char>*>(closure);
+    in->append(data, length);
+    return CAIRO_STATUS_SUCCESS;
+}
+
+String ImageBuffer::toDataURL(const String& mimeType, const double*) const
+{
+    cairo_surface_t* image = cairo_get_target(context()->platformContext());
+    if (!image)
+        return "data:,";
+
+    String actualMimeType("image/png");
+    if (MIMETypeRegistry::isSupportedImageMIMETypeForEncoding(mimeType))
+        actualMimeType = mimeType;
+
+    Vector<char> in;
+    // Only PNG output is supported for now.
+    cairo_surface_write_to_png_stream(image, writeFunction, &in);
+
+    Vector<char> out;
+    base64Encode(in, out);
+
+    return "data:" + actualMimeType + ";base64," + String(out.data(), out.size());
+}
+#endif
+
+} // namespace WebCore