third_party/WebKit/Source/platform/graphics/GeneratedImage.cpp

/*
 * Copyright (C) 2012 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.
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 * in the documentation and/or other materials provided with the
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 * 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,
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#include "platform/graphics/GeneratedImage.h"

#include "platform/geometry/FloatRect.h"
#include "platform/graphics/GraphicsContext.h"
#include "platform/graphics/paint/SkPictureBuilder.h"
#include "third_party/skia/include/core/SkImage.h"
#include "third_party/skia/include/core/SkPicture.h"

namespace blink {

void GeneratedImage::drawPattern(GraphicsContext& destContext, const FloatRect& srcRect, const FloatSize& scale,
    const FloatPoint& phase, SkXfermode::Mode compositeOp, const FloatRect& destRect,
    const FloatSize& repeatSpacing)
{
    FloatRect tileRect = srcRect;
    tileRect.expand(FloatSize(repeatSpacing));

    SkPictureBuilder builder(tileRect, nullptr, &destContext);
    builder.context().beginRecording(tileRect);
    drawTile(builder.context(), srcRect);
    RefPtr<SkPicture> tilePicture = builder.endRecording();

    AffineTransform patternTransform;
    patternTransform.translate(phase.x(), phase.y());
    patternTransform.scale(scale.width(), scale.height());
    patternTransform.translate(tileRect.x(), tileRect.y());

    RefPtr<Pattern> picturePattern = Pattern::createPicturePattern(tilePicture.release());
    picturePattern->setPatternSpaceTransform(patternTransform);

    SkPaint fillPaint = destContext.fillPaint();
    picturePattern->applyToPaint(fillPaint);
    fillPaint.setColor(SK_ColorBLACK);
    fillPaint.setXfermodeMode(compositeOp);

    destContext.drawRect(destRect, fillPaint);
}

PassRefPtr<SkImage> GeneratedImage::imageForCurrentFrame()
{
    return nullptr;
}

} // namespace blink