Source/platform/graphics/GeneratedImage.cpp

/*
 * Copyright (C) 2012 Google Inc. All rights reserved.
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 * modification, are permitted provided that the following conditions are
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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#include "config.h"
#include "platform/graphics/GeneratedImage.h"

#include "platform/geometry/FloatRect.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::computeIntrinsicDimensions(Length& intrinsicWidth, Length& intrinsicHeight, FloatSize& intrinsicRatio)
{
    Image::computeIntrinsicDimensions(intrinsicWidth, intrinsicHeight, intrinsicRatio);
    intrinsicRatio = FloatSize();
}

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

    SkPictureBuilder builder(tileRect, nullptr, destContext);
    builder.context().beginRecording(tileRect);
    drawTile(&builder.context(), srcRect);
    RefPtr<const 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);
    picturePattern->setPatternSpaceTransform(patternTransform);

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

    destContext->drawRect(destRect, fillPaint);
}

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

} // namespace blink