FGFS-4.1/OpenSceneGraph
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Added basic image sequencing

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This commit is contained in:
Robert Osfield
2008-07-21 17:28:22 +00:00
parent f088d113f6
commit acd7e65687
7 changed files with 119 additions and 60 deletions
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57
examples/osgimagesequence/osgimagesequence.cpp
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@@ -35,46 +35,20 @@
// including using of texture extensions.
//
typedef std::vector< osg::ref_ptr<osg::Image> > ImageList;
class MyGraphicsContext {
public:
MyGraphicsContext()
struct ImageUpdateCallback : public osg::StateAttribute::Callback
{
/** do customized update code.*/
virtual void operator () (osg::StateAttribute* attr, osg::NodeVisitor* nv)
{
const osg::FrameStamp* fs = nv!=0 ? nv->getFrameStamp() : 0;
osg::Texture2D* texture2D = dynamic_cast<osg::Texture2D*>(attr);
if (texture2D && texture2D->getImage() && fs)
{
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();
}
texture2D->getImage()->update(fs);
}
bool valid() const { return _gc.valid() && _gc->isRealized(); }
private:
osg::ref_ptr<osg::GraphicsContext> _gc;
}
};
osg::StateSet* createState()
{
// read 4 2d images
@@ -89,22 +63,19 @@ osg::StateSet* createState()
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());
//texture->setTextureSize(512,512);
texture->setUpdateCallback(new ImageUpdateCallback);
// create the StateSet to store the texture data
osg::StateSet* stateset = new osg::StateSet;
stateset->setTextureAttributeAndModes(0,texture,osg::StateAttribute::ON);
return stateset;