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      1 /*
      2  * Copyright (C) 2009 Dirk Schulze <krit (at) 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
     87