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* Copyright (C) 2009 Apple Inc. All rights reserved.
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* (C) 2009 Brent Fulgham <bfulgham@webkit.org>
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of
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* its contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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* THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#include "PixelDumpSupportCairo.h"
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#include "DumpRenderTree.h"
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#include "PixelDumpSupport.h"
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#include <wtf/Assertions.h>
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#include <wtf/RefPtr.h>
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#include <wtf/StringExtras.h>
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static cairo_status_t writeFunction(void* closure, const unsigned char* data, unsigned int length)
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Vector<unsigned char>* in = reinterpret_cast<Vector<unsigned char>*>(closure);
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in->append(data, length);
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return CAIRO_STATUS_SUCCESS;
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static void printPNG(cairo_surface_t* image, const char* checksum)
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Vector<unsigned char> pixelData;
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// Only PNG output is supported for now.
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cairo_surface_write_to_png_stream(image, writeFunction, &pixelData);
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const size_t dataLength = pixelData.size();
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const unsigned char* data = pixelData.data();
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printPNG(data, dataLength, checksum);
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void computeMD5HashStringForBitmapContext(BitmapContext* context, char hashString[33])
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cairo_t* bitmapContext = context->cairoContext();
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cairo_surface_t* surface = cairo_get_target(bitmapContext);
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ASSERT(cairo_image_surface_get_format(surface) == CAIRO_FORMAT_ARGB32); // ImageDiff assumes 32 bit RGBA, we must as well.
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size_t pixelsHigh = cairo_image_surface_get_height(surface);
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size_t pixelsWide = cairo_image_surface_get_width(surface);
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size_t bytesPerRow = cairo_image_surface_get_stride(surface);
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unsigned char* bitmapData = static_cast<unsigned char*>(cairo_image_surface_get_data(surface));
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for (unsigned row = 0; row < pixelsHigh; row++) {
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md5Context.addBytes(bitmapData, 4 * pixelsWide);
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bitmapData += bytesPerRow;
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Vector<uint8_t, 16> hash;
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md5Context.checksum(hash);
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snprintf(hashString, 33, "%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
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hash[0], hash[1], hash[2], hash[3], hash[4], hash[5], hash[6], hash[7],
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hash[8], hash[9], hash[10], hash[11], hash[12], hash[13], hash[14], hash[15]);
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void dumpBitmap(BitmapContext* context, const char* checksum)
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cairo_surface_t* surface = cairo_get_target(context->cairoContext());
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printPNG(surface, checksum);