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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 "wtf/StdLibExtras.h"
     28 #include "wtf/text/WTFString.h"
     29 
     30 namespace WebCore {
     31 
     32 PassRefPtr<SourceGraphic> SourceGraphic::create(Filter* filter)
     33 {
     34     return adoptRef(new SourceGraphic(filter));
     35 }
     36 
     37 const AtomicString& SourceGraphic::effectName()
     38 {
     39     DEFINE_STATIC_LOCAL(const AtomicString, s_effectName, ("SourceGraphic", AtomicString::ConstructFromLiteral));
     40     return s_effectName;
     41 }
     42 
     43 FloatRect SourceGraphic::determineAbsolutePaintRect(const FloatRect& requestedRect)
     44 {
     45     FloatRect srcRect = filter()->sourceImageRect();
     46     srcRect.intersect(requestedRect);
     47     addAbsolutePaintRect(srcRect);
     48     return srcRect;
     49 }
     50 
     51 void SourceGraphic::applySoftware()
     52 {
     53     ImageBuffer* resultImage = createImageBufferResult();
     54     Filter* filter = this->filter();
     55     if (!resultImage || !filter->sourceImage())
     56         return;
     57 
     58     IntRect srcRect = filter->sourceImageRect();
     59     if (ImageBuffer* sourceImageBuffer = filter->sourceImage()) {
     60         resultImage->context()->drawImageBuffer(sourceImageBuffer,
     61             FloatRect(IntPoint(srcRect.location() - absolutePaintRect().location()), sourceImageBuffer->size()));
     62     }
     63 }
     64 
     65 TextStream& SourceGraphic::externalRepresentation(TextStream& ts, int indent) const
     66 {
     67     writeIndent(ts, indent);
     68     ts << "[SourceGraphic]\n";
     69     return ts;
     70 }
     71 
     72 } // namespace WebCore
     73