/*

 * 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);

}