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
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 * in the documentation and/or other materials provided with the
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 *
 * 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
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#include "platform/graphics/GeneratedImage.h"

#include "platform/geometry/FloatRect.h"
#include "platform/graphics/GraphicsContext.h"
#include "platform/graphics/paint/PaintController.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,
                                 SkBlendMode compositeOp,
                                 const FloatRect& destRect,
                                 const FloatSize& repeatSpacing) {
  FloatRect tileRect = srcRect;
  tileRect.expand(FloatSize(repeatSpacing));

  std::unique_ptr<PaintController> paintController = PaintController::create();
  GraphicsContext context(*paintController);
  context.beginRecording(tileRect);
  drawTile(context, srcRect);
  sk_sp<SkPicture> tilePicture = context.endRecording();

  SkMatrix patternMatrix = SkMatrix::MakeTrans(phase.x(), phase.y());
  patternMatrix.preScale(scale.width(), scale.height());
  patternMatrix.preTranslate(tileRect.x(), tileRect.y());

  RefPtr<Pattern> picturePattern =
      Pattern::createPicturePattern(std::move(tilePicture));

  SkPaint fillPaint = destContext.fillPaint();
  picturePattern->applyToPaint(fillPaint, patternMatrix);
  fillPaint.setColor(SK_ColorBLACK);
  fillPaint.setBlendMode(compositeOp);

  destContext.drawRect(destRect, fillPaint);
}

sk_sp<SkImage> GeneratedImage::imageForCurrentFrame(
    const ColorBehavior& colorBehavior) {
  return nullptr;
}

}  // namespace blink