--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/WebKitTools/DumpRenderTree/cairo/PixelDumpSupportCairo.cpp	Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,93 @@
+/*
+ * Copyright (C) 2009 Apple Inc. All rights reserved.
+ *           (C) 2009 Brent Fulgham <bfulgham@webkit.org>
+ *           (C) 2010 Igalia S.L
+ *
+ * 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.
+ * 3.  Neither the name of Apple Computer, Inc. ("Apple") 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 APPLE AND ITS 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 APPLE OR ITS 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 "PixelDumpSupportCairo.h"
+
+#include "DumpRenderTree.h"
+#include "PixelDumpSupport.h"
+#include <algorithm>
+#include <ctype.h>
+#include <wtf/Assertions.h>
+#include <wtf/MD5.h>
+#include <wtf/RefPtr.h>
+#include <wtf/StringExtras.h>
+
+using namespace std;
+
+static cairo_status_t writeFunction(void* closure, const unsigned char* data, unsigned int length)
+{
+    Vector<unsigned char>* in = reinterpret_cast<Vector<unsigned char>*>(closure);
+    in->append(data, length);
+    return CAIRO_STATUS_SUCCESS;
+}
+
+static void printPNG(cairo_surface_t* image)
+{
+    Vector<unsigned char> pixelData;
+    // Only PNG output is supported for now.
+    cairo_surface_write_to_png_stream(image, writeFunction, &pixelData);
+
+    const size_t dataLength = pixelData.size();
+    const unsigned char* data = pixelData.data();
+
+    printPNG(data, dataLength);
+}
+
+void computeMD5HashStringForBitmapContext(BitmapContext* context, char hashString[33])
+{
+    cairo_t* bitmapContext = context->cairoContext();
+    cairo_surface_t* surface = cairo_get_target(bitmapContext);
+
+    ASSERT(cairo_image_surface_get_format(surface) == CAIRO_FORMAT_ARGB32); // ImageDiff assumes 32 bit RGBA, we must as well.
+
+    size_t pixelsHigh = cairo_image_surface_get_height(surface);
+    size_t pixelsWide = cairo_image_surface_get_width(surface);
+    size_t bytesPerRow = cairo_image_surface_get_stride(surface);
+
+    MD5 md5Context;
+    unsigned char* bitmapData = static_cast<unsigned char*>(cairo_image_surface_get_data(surface));
+    for (unsigned row = 0; row < pixelsHigh; row++) {
+        md5Context.addBytes(bitmapData, 4 * pixelsWide);
+        bitmapData += bytesPerRow;
+    }
+    Vector<uint8_t, 16> hash;
+    md5Context.checksum(hash);
+
+    snprintf(hashString, 33, "%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
+        hash[0], hash[1], hash[2], hash[3], hash[4], hash[5], hash[6], hash[7],
+        hash[8], hash[9], hash[10], hash[11], hash[12], hash[13], hash[14], hash[15]);
+}
+
+void dumpBitmap(BitmapContext* context)
+{
+    cairo_surface_t* surface = cairo_get_target(context->cairoContext());
+    printPNG(surface);
+}