root/OpenSceneGraph/trunk/examples/osgimagesequence/osgimagesequence.cpp @ 8637

/* OpenSceneGraph example, osgtexture3D.
*
*  Permission is hereby granted, free of charge, to any person obtaining a copy
*  of this software and associated documentation files (the "Software"), to deal
*  in the Software without restriction, including without limitation the rights
*  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
*  copies of the Software, and to permit persons to whom the Software is
*  furnished to do so, subject to the following conditions:
*
*  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
*  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
*  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
*  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
*  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
*  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
*  THE SOFTWARE.
*/

#include <osg/Node>
#include <osg/Geometry>
#include <osg/Notify>
#include <osg/Texture2D>
#include <osg/ImageSequence>
#include <osg/Geode>

#include <osgDB/Registry>
#include <osgDB/ReadFile>

#include <osgViewer/Viewer>

#include <iostream>

//
// A simple demo demonstrating different texturing modes, 
// including using of texture extensions.
//


typedef std::vector< osg::ref_ptr<osg::Image> > ImageList;


class MyGraphicsContext {
    public:
        MyGraphicsContext()
        {
            osg::ref_ptr<osg::GraphicsContext::Traits> traits = new osg::GraphicsContext::Traits;
            traits->x = 0;
            traits->y = 0;
            traits->width = 1;
            traits->height = 1;
            traits->windowDecoration = false;
            traits->doubleBuffer = false;
            traits->sharedContext = 0;
            traits->pbuffer = true;

            _gc = osg::GraphicsContext::createGraphicsContext(traits.get());

            if (!_gc)
            {
                traits->pbuffer = false;
                _gc = osg::GraphicsContext::createGraphicsContext(traits.get());
            }

            if (_gc.valid()) 
            {
                _gc->realize();
                _gc->makeCurrent();
            }
        }
        
        bool valid() const { return _gc.valid() && _gc->isRealized(); }
        
    private:
        osg::ref_ptr<osg::GraphicsContext> _gc;
};


osg::StateSet* createState()
{
    // read 4 2d images
    osg::ref_ptr<osg::Image> image_0 = osgDB::readImageFile("Images/lz.rgb");
    osg::ref_ptr<osg::Image> image_1 = osgDB::readImageFile("Images/reflect.rgb");
    osg::ref_ptr<osg::Image> image_2 = osgDB::readImageFile("Images/tank.rgb");
    osg::ref_ptr<osg::Image> image_3 = osgDB::readImageFile("Images/skymap.jpg");

    osg::ref_ptr<osg::ImageSequence> imageSequence = new osg::ImageSequence;
    imageSequence->addImage(image_0.get(), 0.25);
    imageSequence->addImage(image_1.get(), 0.25);
    imageSequence->addImage(image_2.get(), 0.25);
    imageSequence->addImage(image_3.get(), 0.25);

    imageSequence->setImage(image_0->s(),image_0->t(),image_0->r(),
                  image_0->getInternalTextureFormat(),
                  image_0->getPixelFormat(),image_0->getDataType(),
                  image_0->data(),
                  osg::Image::NO_DELETE,
                  image_0->getPacking());

    osg::Texture2D* texture = new osg::Texture2D;
    texture->setFilter(osg::Texture2D::MIN_FILTER,osg::Texture2D::LINEAR);
    texture->setFilter(osg::Texture2D::MAG_FILTER,osg::Texture2D::LINEAR);
    texture->setWrap(osg::Texture2D::WRAP_R,osg::Texture2D::REPEAT);
    texture->setResizeNonPowerOfTwoHint(false);
    texture->setImage(imageSequence.get());

    // create the StateSet to store the texture data
    osg::StateSet* stateset = new osg::StateSet;
    stateset->setTextureAttributeAndModes(0,texture,osg::StateAttribute::ON);

    return stateset;
}

osg::Node* createModel()
{

    // create the geometry of the model, just a simple 2d quad right now.    
    osg::Geode* geode = new osg::Geode;
    geode->addDrawable(osg::createTexturedQuadGeometry(osg::Vec3(0.0f,0.0f,0.0), osg::Vec3(1.0f,0.0f,0.0), osg::Vec3(0.0f,0.0f,1.0f)));

    geode->setStateSet(createState());
    
    return geode;

}


int main(int , char **)
{
    // construct the viewer.
    osgViewer::Viewer viewer;

    // create a model from the images and pass it to the viewer.
    viewer.setSceneData(createModel());

    return viewer.run();
}