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

   1 /*
   2  * Copyright (C) 2012 Google Inc. All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions are
   6  * met:
   7  *
   8  *     * Redistributions of source code must retain the above copyright
   9  * notice, this list of conditions and the following disclaimer.
  10  *     * Redistributions in binary form must reproduce the above
  11  * copyright notice, this list of conditions and the following disclaimer
  12  * in the documentation and/or other materials provided with the
  13  * distribution.
  14  *     * Neither the name of Google Inc. nor the names of its
  15  * contributors may be used to endorse or promote products derived from
  16  * this software without specific prior written permission.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  21  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  22  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  23  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  24  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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  28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  29  */
  30
  31 #include "config.h"
  32 #include "platform/graphics/GeneratedImage.h"
  33
  34 #include "platform/geometry/FloatRect.h"
  35 #include "platform/graphics/paint/SkPictureBuilder.h"
  36 #include "third_party/skia/include/core/SkImage.h"
  37 #include "third_party/skia/include/core/SkPicture.h"
  38
  39 namespace blink {
  40
  41 void GeneratedImage::computeIntrinsicDimensions(Length& intrinsicWidth, Length& intrinsicHeight, FloatSize& intrinsicRatio)
  42 {
  43     Image::computeIntrinsicDimensions(intrinsicWidth, intrinsicHeight, intrinsicRatio);
  44     intrinsicRatio = FloatSize();
  45 }
  46
  47 void GeneratedImage::drawPattern(GraphicsContext* destContext, const FloatRect& srcRect, const FloatSize& scale,
  48     const FloatPoint& phase, SkXfermode::Mode compositeOp, const FloatRect& destRect,
  49     const IntSize& repeatSpacing)
  50 {
  51     FloatRect tileRect = srcRect;
  52     tileRect.expand(repeatSpacing);
  53
  54     SkPictureBuilder builder(tileRect, nullptr, destContext);
  55     builder.context().beginRecording(tileRect);
  56     drawTile(&builder.context(), srcRect);
  57     RefPtr<const SkPicture> tilePicture = builder.endRecording();
  58
  59     AffineTransform patternTransform;
  60     patternTransform.translate(phase.x(), phase.y());
  61     patternTransform.scale(scale.width(), scale.height());
  62     patternTransform.translate(tileRect.x(), tileRect.y());
  63
  64     RefPtr<Pattern> picturePattern = Pattern::createPicturePattern(tilePicture);
  65     picturePattern->setPatternSpaceTransform(patternTransform);
  66
  67     SkPaint fillPaint = destContext->fillPaint();
  68     fillPaint.setShader(picturePattern->shader());
  69     fillPaint.setColor(SK_ColorBLACK);
  70     fillPaint.setXfermodeMode(compositeOp);
  71
  72     destContext->drawRect(destRect, fillPaint);
  73 }
  74
  75 PassRefPtr<SkImage> GeneratedImage::imageForCurrentFrame()
  76 {
  77     return nullptr;
  78 }
  79
  80 } // namespace blink