FGFS-4.1/OpenSceneGraph
4
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Added beginings of PhotoArchive for storing and loading a set of

Browse Source 
photos from an archive.
This commit is contained in:
Robert Osfield 2003-12-22 21:05:10 +00:00
parent 679b2e44b8
commit ca7a80685d
6 changed files with 319 additions and 207 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
examples/osgphotoalbum/GNUmakefile
View File

@ -2,6 +2,8 @@ TOPDIR = ../..
include $(TOPDIR)/Make/makedefs
CXXFILES =\
ImageReaderWriter.cpp\
PhotoArchive.cpp\
osgphotoalbum.cpp\
LIBS += -losgProducer -lProducer -losgText -losgGA -losgDB -losgUtil -losg $(GL_LIBS) $(X_LIBS) $(OTHER_LIBS)

215
examples/osgphotoalbum/ImageReaderWriter.cpp Normal file
View File

@ -0,0 +1,215 @@
/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2003 Robert Osfield
*
* This application is open source and may be redistributed and/or modified under
* the terms of the GNU Public License (GPL) version 1.0 or
* (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* OpenSceneGraph Public License for more details.
*/
#include "ImageReaderWriter.h"
#include <osg/Texture2D>
#include <osg/Geometry>
#include <osg/Geode>
#include <sstream>
ImageReaderWriter::DataReference::DataReference():
_fileName(),
_resolutionX(256),
_resolutionY(256),
_center(0.625f,0.0f,0.0f),
_maximumWidth(1.25f,0.0f,0.0f),
_maximumHeight(0.0f,0.0f,1.0f),
_numPointsAcross(10),
_numPointsUp(10),
_backPage(false) {}
ImageReaderWriter::DataReference::DataReference(const std::string& fileName, unsigned int res, float width, float height,bool backPage):
_fileName(fileName),
_resolutionX(res),
_resolutionY(res),
_center(width*0.5f,0.0f,height*0.5f),
_maximumWidth(width,0.0f,0.0f),
_maximumHeight(0.0f,0.0f,height),
_numPointsAcross(10),
_numPointsUp(10),
_backPage(backPage) {}
ImageReaderWriter::DataReference::DataReference(const DataReference& rhs):
_fileName(rhs._fileName),
_resolutionX(rhs._resolutionX),
_resolutionY(rhs._resolutionY),
_center(rhs._center),
_maximumWidth(rhs._maximumWidth),
_maximumHeight(rhs._maximumHeight),
_numPointsAcross(rhs._numPointsAcross),
_numPointsUp(rhs._numPointsUp),
_backPage(rhs._backPage) {}
ImageReaderWriter::ImageReaderWriter()
{
}
std::string ImageReaderWriter::insertReference(const std::string& fileName, unsigned int res, float width, float height, bool backPage)
{
std::stringstream ostr;
ostr<<"res_"<<res<<"_"<<fileName;
std::string myReference = ostr.str();
_dataReferences[myReference] = DataReference(fileName,res,width,height,backPage);
return myReference;
}
osg::Image* ImageReaderWriter::readImage_Archive(DataReference& dr, float& s,float& t)
{
return 0;
}
osg::Image* ImageReaderWriter::readImage_DynamicSampling(DataReference& dr, float& s,float& t)
{
// record previous options.
osg::ref_ptr<osgDB::ReaderWriter::Options> previousOptions = osgDB::Registry::instance()->getOptions();
osg::ref_ptr<osgDB::ImageOptions> options = new osgDB::ImageOptions;
options->_destinationImageWindowMode = osgDB::ImageOptions::PIXEL_WINDOW;
options->_destinationPixelWindow.set(0,0,dr._resolutionX,dr._resolutionY);
osgDB::Registry::instance()->setOptions(options.get());
osg::Image* image = osgDB::readImageFile(dr._fileName);
// restore previous options.
osgDB::Registry::instance()->setOptions(previousOptions.get());
s = options.valid()?options->_sourcePixelWindow.windowWidth:1.0f;
t = options.valid()?options->_sourcePixelWindow.windowHeight:1.0f;
return image;
}
osgDB::ReaderWriter::ReadResult ImageReaderWriter::readNode(const std::string& fileName, const Options*)
{
std::cout<<"Request to read paged image "<<fileName<<std::endl;
DataReferenceMap::iterator itr = _dataReferences.find(fileName);
if (itr==_dataReferences.end()) return ReaderWriter::ReadResult::FILE_NOT_HANDLED;
DataReference& dr = itr->second;
osg::Image* image = 0;
float s=1.0f,t=1.0f;
if (_photoArchive.valid())
image = readImage_Archive(dr,s,t);
else
image = readImage_DynamicSampling(dr,s,t);
if (image)
{
float photoWidth = 0.0f;
float photoHeight = 0.0f;
float maxWidth = dr._maximumWidth.length();
float maxHeight = dr._maximumHeight.length();
if ((s/t)>(maxWidth/maxHeight))
{
// photo wider than tall relative to the required pictures size.
// so need to clamp the width to the maximum width and then
// set the height to keep the original photo aspect ratio.
photoWidth = maxWidth;
photoHeight = photoWidth*(t/s);
}
else
{
// photo tall than wide relative to the required pictures size.
// so need to clamp the height to the maximum height and then
// set the width to keep the original photo aspect ratio.
photoHeight = maxHeight;
photoWidth = photoHeight*(s/t);
}
photoWidth*=0.95;
photoHeight*=0.95;
osg::Vec3 halfWidthVector(dr._maximumWidth*(photoWidth*0.5f/maxWidth));
osg::Vec3 halfHeightVector(dr._maximumHeight*(photoHeight*0.5f/maxHeight));
// set up the texture.
osg::Texture2D* texture = new osg::Texture2D;
texture->setImage(image);
texture->setFilter(osg::Texture::MIN_FILTER,osg::Texture::LINEAR);
texture->setFilter(osg::Texture::MAG_FILTER,osg::Texture::LINEAR);
// set up the drawstate.
osg::StateSet* dstate = new osg::StateSet;
dstate->setMode(GL_LIGHTING,osg::StateAttribute::OFF);
dstate->setTextureAttributeAndModes(0, texture,osg::StateAttribute::ON);
// set up the geoset.
osg::Geometry* geom = new osg::Geometry;
geom->setStateSet(dstate);
osg::Vec3Array* coords = new osg::Vec3Array(4);
if (!dr._backPage)
{
(*coords)[0] = dr._center - halfWidthVector + halfHeightVector;
(*coords)[1] = dr._center - halfWidthVector - halfHeightVector;
(*coords)[2] = dr._center + halfWidthVector - halfHeightVector;
(*coords)[3] = dr._center + halfWidthVector + halfHeightVector;
}
else
{
(*coords)[3] = dr._center - halfWidthVector + halfHeightVector;
(*coords)[2] = dr._center - halfWidthVector - halfHeightVector;
(*coords)[1] = dr._center + halfWidthVector - halfHeightVector;
(*coords)[0] = dr._center + halfWidthVector + halfHeightVector;
}
geom->setVertexArray(coords);
osg::Vec2Array* tcoords = new osg::Vec2Array(4);
(*tcoords)[0].set(0.0f,1.0f);
(*tcoords)[1].set(0.0f,0.0f);
(*tcoords)[2].set(1.0f,0.0f);
(*tcoords)[3].set(1.0f,1.0f);
geom->setTexCoordArray(0,tcoords);
osg::Vec4Array* colours = new osg::Vec4Array(1);
(*colours)[0].set(1.0f,1.0f,1.0,1.0f);
geom->setColorArray(colours);
geom->setColorBinding(osg::Geometry::BIND_OVERALL);
geom->addPrimitiveSet(new osg::DrawArrays(osg::PrimitiveSet::QUADS,0,4));
// set up the geode.
osg::Geode* geode = new osg::Geode;
geode->addDrawable(geom);
return geode;
}
else
{
return ReaderWriter::ReadResult::FILE_NOT_HANDLED;
}
}

71
examples/osgphotoalbum/ImageReaderWriter.h Normal file
View File

@ -0,0 +1,71 @@
/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2003 Robert Osfield
*
* This application is open source and may be redistributed and/or modified under
* the terms of the GNU Public License (GPL) version 1.0 or
* (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* OpenSceneGraph Public License for more details.
*/
#ifndef IMAGEREADERWRITER_H
#define IMAGEREADERWRITER_H
#include <osgDB/ReadFile>
#include <osgDB/WriteFile>
#include <osgDB/ImageOptions>
#include "PhotoArchive.h"
class ImageReaderWriter : public osgDB::ReaderWriter
{
public:
ImageReaderWriter();
virtual const char* className() { return "ImageReader"; }
void setPhotoArchive(PhotoArchive* archive) { _photoArchive = archive; }
PhotoArchive* getPhotoArchive() { return _photoArchive.get(); }
const PhotoArchive* getPhotoArchive() const { return _photoArchive.get(); }
std::string insertReference(const std::string& fileName, unsigned int res, float width, float height, bool backPage);
virtual ReadResult readNode(const std::string& fileName, const Options*);
protected:
struct DataReference
{
DataReference();
DataReference(const std::string& fileName, unsigned int res, float width, float height,bool backPage);
DataReference(const DataReference& rhs);
std::string _fileName;
unsigned int _resolutionX;
unsigned int _resolutionY;
osg::Vec3 _center;
osg::Vec3 _maximumWidth;
osg::Vec3 _maximumHeight;
unsigned int _numPointsAcross;
unsigned int _numPointsUp;
bool _backPage;
};
osg::Image* readImage_Archive(DataReference& dr, float& s,float& t);
osg::Image* readImage_DynamicSampling(DataReference& dr, float& s,float& t);
typedef std::map<std::string,DataReference> DataReferenceMap;
DataReferenceMap _dataReferences;
osg::ref_ptr<PhotoArchive> _photoArchive;
};
#endif

14
examples/osgphotoalbum/PhotoArchive.cpp Normal file
View File

@ -0,0 +1,14 @@
/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2003 Robert Osfield
*
* This application is open source and may be redistributed and/or modified under
* the terms of the GNU Public License (GPL) version 1.0 or
* (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* OpenSceneGraph Public License for more details.
*/
#include "PhotoArchive.h"

10
examples/osgphotoalbum/PhotoArchive.h Normal file
View File

@ -0,0 +1,10 @@
#ifndef PHOTOARCHIVE_H
#define PHOTOARCHIVE_H
#include <osg/Image>
class PhotoArchive : public osg::Referenced
{
};
#endif

214
examples/osgphotoalbum/osgphotoalbum.cpp
View File

@ -1,9 +1,8 @@
/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2003 Robert Osfield
*
* This library is open source and may be redistributed and/or modified under
* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
* (at your option) any later version. The full license is in LICENSE file
* included with this distribution, and on the openscenegraph.org website.
* This application is open source and may be redistributed and/or modified under
* the terms of the GNU Public License (GPL) version 1.0 or
* (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
@ -11,222 +10,23 @@
* OpenSceneGraph Public License for more details.
*/
#include <osg/Geode>
#include <osg/Notify>
#include <osg/MatrixTransform>
#include <osg/Switch>
#include <osg/TexMat>
#include <osg/Texture2D>
#include <osg/PolygonOffset>
#include <osg/CullFace>
#include <osgUtil/Optimizer>
#include <osgDB/ReadFile>
#include <osgDB/WriteFile>
#include <osgDB/ImageOptions>
#include <osgText/Text>
#include <osgProducer/Viewer>
#include <sstream>
#include "ImageReaderWriter.h"
class ImageReaderWriter : public osgDB::ReaderWriter
{
public:
virtual const char* className() { return "Image Reader"; }
struct DataReference
{
DataReference():
_fileName(),
_resolutionX(256),
_resolutionY(256),
_center(0.625f,0.0f,0.0f),
_maximumWidth(1.25f,0.0f,0.0f),
_maximumHeight(0.0f,0.0f,1.0f),
_numPointsAcross(10),
_numPointsUp(10),
_backPage(false) {}
DataReference(const std::string& fileName, unsigned int res, float width, float height,bool backPage):
_fileName(fileName),
_resolutionX(res),
_resolutionY(res),
_center(width*0.5f,0.0f,height*0.5f),
_maximumWidth(width,0.0f,0.0f),
_maximumHeight(0.0f,0.0f,height),
_numPointsAcross(10),
_numPointsUp(10),
_backPage(backPage) {}
DataReference(const DataReference& rhs):
_fileName(rhs._fileName),
_resolutionX(rhs._resolutionX),
_resolutionY(rhs._resolutionY),
_center(rhs._center),
_maximumWidth(rhs._maximumWidth),
_maximumHeight(rhs._maximumHeight),
_numPointsAcross(rhs._numPointsAcross),
_numPointsUp(rhs._numPointsUp),
_backPage(rhs._backPage) {}
std::string _fileName;
unsigned int _resolutionX;
unsigned int _resolutionY;
osg::Vec3 _center;
osg::Vec3 _maximumWidth;
osg::Vec3 _maximumHeight;
unsigned int _numPointsAcross;
unsigned int _numPointsUp;
bool _backPage;
};
typedef std::map<std::string,DataReference> DataReferenceMap;
DataReferenceMap _dataReferences;
std::string insertReference(const std::string& fileName, unsigned int res, float width, float height, bool backPage)
{
std::stringstream ostr;
ostr<<"res_"<<res<<"_"<<fileName;
std::string myReference = ostr.str();
_dataReferences[myReference] = DataReference(fileName,res,width,height,backPage);
return myReference;
}
virtual ReadResult readNode(const std::string& fileName, const Options*)
{
std::cout<<"Trying to read paged image "<<fileName<<std::endl;
DataReferenceMap::iterator itr = _dataReferences.find(fileName);
if (itr==_dataReferences.end()) return ReaderWriter::ReadResult::FILE_NOT_HANDLED;
DataReference& dr = itr->second;
// record previous options.
osg::ref_ptr<osgDB::ReaderWriter::Options> previousOptions = osgDB::Registry::instance()->getOptions();
osg::ref_ptr<osgDB::ImageOptions> options = new osgDB::ImageOptions;
options->_destinationImageWindowMode = osgDB::ImageOptions::PIXEL_WINDOW;
options->_destinationPixelWindow.set(0,0,dr._resolutionX,dr._resolutionY);
osgDB::Registry::instance()->setOptions(options.get());
osg::Image* image = osgDB::readImageFile(dr._fileName);
// restore previous options.
osgDB::Registry::instance()->setOptions(previousOptions.get());
if (image)
{
float s = options.valid()?options->_sourcePixelWindow.windowWidth:1.0f;
float t = options.valid()?options->_sourcePixelWindow.windowHeight:1.0f;
float photoWidth = 0.0f;
float photoHeight = 0.0f;
float maxWidth = dr._maximumWidth.length();
float maxHeight = dr._maximumHeight.length();
if ((s/t)>(maxWidth/maxHeight))
{
// photo wider than tall relative to the required pictures size.
// so need to clamp the width to the maximum width and then
// set the height to keep the original photo aspect ratio.
photoWidth = maxWidth;
photoHeight = photoWidth*(t/s);
}
else
{
// photo tall than wide relative to the required pictures size.
// so need to clamp the height to the maximum height and then
// set the width to keep the original photo aspect ratio.
photoHeight = maxHeight;
photoWidth = photoHeight*(s/t);
}
photoWidth*=0.95;
photoHeight*=0.95;
osg::Vec3 halfWidthVector(dr._maximumWidth*(photoWidth*0.5f/maxWidth));
osg::Vec3 halfHeightVector(dr._maximumHeight*(photoHeight*0.5f/maxHeight));
// set up the texture.
osg::Texture2D* texture = new osg::Texture2D;
texture->setImage(image);
texture->setFilter(osg::Texture::MIN_FILTER,osg::Texture::LINEAR);
texture->setFilter(osg::Texture::MAG_FILTER,osg::Texture::LINEAR);
// set up the drawstate.
osg::StateSet* dstate = new osg::StateSet;
dstate->setMode(GL_LIGHTING,osg::StateAttribute::OFF);
dstate->setTextureAttributeAndModes(0, texture,osg::StateAttribute::ON);
// set up the geoset.
osg::Geometry* geom = new osg::Geometry;
geom->setStateSet(dstate);
osg::Vec3Array* coords = new osg::Vec3Array(4);
if (!dr._backPage)
{
(*coords)[0] = dr._center - halfWidthVector + halfHeightVector;
(*coords)[1] = dr._center - halfWidthVector - halfHeightVector;
(*coords)[2] = dr._center + halfWidthVector - halfHeightVector;
(*coords)[3] = dr._center + halfWidthVector + halfHeightVector;
}
else
{
(*coords)[3] = dr._center - halfWidthVector + halfHeightVector;
(*coords)[2] = dr._center - halfWidthVector - halfHeightVector;
(*coords)[1] = dr._center + halfWidthVector - halfHeightVector;
(*coords)[0] = dr._center + halfWidthVector + halfHeightVector;
}
geom->setVertexArray(coords);
osg::Vec2Array* tcoords = new osg::Vec2Array(4);
(*tcoords)[0].set(0.0f,1.0f);
(*tcoords)[1].set(0.0f,0.0f);
(*tcoords)[2].set(1.0f,0.0f);
(*tcoords)[3].set(1.0f,1.0f);
geom->setTexCoordArray(0,tcoords);
osg::Vec4Array* colours = new osg::Vec4Array(1);
(*colours)[0].set(1.0f,1.0f,1.0,1.0f);
geom->setColorArray(colours);
geom->setColorBinding(osg::Geometry::BIND_OVERALL);
geom->addPrimitiveSet(new osg::DrawArrays(osg::PrimitiveSet::QUADS,0,4));
// set up the geode.
osg::Geode* geode = new osg::Geode;
geode->addDrawable(geom);
return geode;
}
else
{
return ReaderWriter::ReadResult::FILE_NOT_HANDLED;
}
}
};
// now register with Registry to instantiate the above
// reader/writer.
// now register with Registry to instantiate the above reader/writer,
// declaring in main so that the code to set up PagedLOD can get a handle
// to the ImageReaderWriter's
osgDB::RegisterReaderWriterProxy<ImageReaderWriter> g_ImageReaderWriter;
class Album;