102 lines
3.1 KiB
C++
102 lines
3.1 KiB
C++
/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2008 Robert Osfield
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*
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* This library is open source and may be redistributed and/or modified under
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* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
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* (at your option) any later version. The full license is in LICENSE file
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* included with this distribution, and on the openscenegraph.org website.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* OpenSceneGraph Public License for more details.
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*/
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#include <osg/Geode>
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#include <osgDB/ReadFile>
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#include <osgViewer/ViewerEventHandlers>
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#include <osgWidget/PdfReader>
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#include <osg/io_utils>
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using namespace osgWidget;
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PdfReader::PdfReader(const std::string& filename, const GeometryHints& hints)
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{
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open(filename, hints);
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}
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bool PdfReader::assign(PdfImage* pdfImage, const GeometryHints& hints)
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{
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if (!pdfImage) return false;
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_pdfImage = pdfImage;
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_pdfImage->setBackgroundColor(hints.backgroundColor);
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bool flip = _pdfImage->getOrigin()==osg::Image::TOP_LEFT;
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float aspectRatio = (_pdfImage->t()>0 && _pdfImage->s()>0) ? float(_pdfImage->t()) / float(_pdfImage->s()) : 1.0;
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osg::Vec3 widthVec(hints.widthVec);
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osg::Vec3 heightVec(hints.heightVec);
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switch(hints.aspectRatioPolicy)
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{
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case(GeometryHints::RESIZE_HEIGHT_TO_MAINTAINCE_ASPECT_RATIO):
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heightVec *= aspectRatio;
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break;
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case(GeometryHints::RESIZE_WIDTH_TO_MAINTAINCE_ASPECT_RATIO):
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widthVec /= aspectRatio;
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break;
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default:
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// no need to adjust aspect ratio
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break;
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}
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osg::Geometry* pictureQuad = osg::createTexturedQuadGeometry(hints.position, widthVec, heightVec,
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0.0f, flip ? 1.0f : 0.0f , 1.0f, flip ? 0.0f : 1.0f);
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osg::Texture2D* texture = new osg::Texture2D(_pdfImage.get());
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texture->setResizeNonPowerOfTwoHint(false);
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texture->setFilter(osg::Texture::MIN_FILTER,osg::Texture::LINEAR);
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texture->setWrap(osg::Texture::WRAP_S, osg::Texture::CLAMP_TO_EDGE);
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texture->setWrap(osg::Texture::WRAP_T, osg::Texture::CLAMP_TO_EDGE);
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pictureQuad->getOrCreateStateSet()->setTextureAttributeAndModes(0,
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texture,
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osg::StateAttribute::ON);
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pictureQuad->setEventCallback(new osgViewer::InteractiveImageHandler(_pdfImage.get()));
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addDrawable(pictureQuad);
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return true;
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}
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bool PdfReader::open(const std::string& filename, const GeometryHints& hints)
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{
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osg::ref_ptr<osg::Image> image = osgDB::readImageFile(filename);
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return assign(dynamic_cast<PdfImage*>(image.get()), hints);
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}
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bool PdfReader::page(int pageNum)
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{
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if (!_pdfImage) return false;
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return _pdfImage->page(pageNum);
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}
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bool PdfReader::previous()
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{
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if (!_pdfImage) return false;
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return _pdfImage->previous();
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}
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bool PdfReader::next()
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{
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if (!_pdfImage) return false;
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return _pdfImage->next();
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}
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