src/third_party/WebKit/Source/platform/graphics/filters/SourceGraphic.cpp

   1 /*
   2  * Copyright (C) 2009 Dirk Schulze <krit@webkit.org>
   3  * Copyright (C) 2013 Google Inc. All rights reserved.
   4  *
   5  * This library is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU Library General Public
   7  * License as published by the Free Software Foundation; either
   8  * version 2 of the License, or (at your option) any later version.
   9  *
  10  * This library is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * Library General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Library General Public License
  16  * along with this library; see the file COPYING.LIB.  If not, write to
  17  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  18  * Boston, MA 02110-1301, USA.
  19  */
  20
  21 #include "config.h"
  22
  23 #include "platform/graphics/filters/SourceGraphic.h"
  24
  25 #include "platform/graphics/GraphicsContext.h"
  26 #include "platform/text/TextStream.h"
  27 #include "third_party/skia/include/effects/SkPictureImageFilter.h"
  28 #include "wtf/StdLibExtras.h"
  29 #include "wtf/text/WTFString.h"
  30
  31 namespace blink {
  32
  33 PassRefPtr<SourceGraphic> SourceGraphic::create(Filter* filter)
  34 {
  35     return adoptRef(new SourceGraphic(filter));
  36 }
  37
  38 const AtomicString& SourceGraphic::effectName()
  39 {
  40     DEFINE_STATIC_LOCAL(const AtomicString, s_effectName, ("SourceGraphic", AtomicString::ConstructFromLiteral));
  41     return s_effectName;
  42 }
  43
  44 FloatRect SourceGraphic::determineAbsolutePaintRect(const FloatRect& requestedRect)
  45 {
  46     FloatRect srcRect = filter()->sourceImageRect();
  47     srcRect.intersect(requestedRect);
  48     addAbsolutePaintRect(srcRect);
  49     return srcRect;
  50 }
  51
  52 void SourceGraphic::applySoftware()
  53 {
  54     ImageBuffer* resultImage = createImageBufferResult();
  55     Filter* filter = this->filter();
  56     if (!resultImage || !filter->sourceImage())
  57         return;
  58
  59     IntRect srcRect = filter->sourceImageRect();
  60     if (ImageBuffer* sourceImageBuffer = filter->sourceImage()) {
  61         resultImage->context()->drawImageBuffer(sourceImageBuffer,
  62             FloatRect(IntPoint(srcRect.location() - absolutePaintRect().location()), sourceImageBuffer->size()));
  63     }
  64 }
  65
  66 void SourceGraphic::setDisplayList(PassRefPtr<DisplayList> displayList)
  67 {
  68     m_displayList = displayList;
  69 }
  70
  71 PassRefPtr<SkImageFilter> SourceGraphic::createImageFilter(SkiaImageFilterBuilder*)
  72 {
  73     if (!m_displayList)
  74         return nullptr;
  75
  76     return adoptRef(SkPictureImageFilter::Create(m_displayList->picture(), m_displayList->bounds()));
  77 }
  78
  79 TextStream& SourceGraphic::externalRepresentation(TextStream& ts, int indent) const
  80 {
  81     writeIndent(ts, indent);
  82     ts << "[SourceGraphic]\n";
  83     return ts;
  84 }
  85
  86 } // namespace blink