Hi,
I've done the same a few weeks ago :
- a customer low-level OpenGL API is creating some ressources (like textures)
- my OSG applicatino have to use these ressources
So I created a "MyTexture" class :
Code:
class MyTexture : public osg::StateAttribute
{
private:
CustomerGL::Texture
p_CustomerTexture;
public:
Texture();
Texture(CustomerGL::Texture* p_CustomerTexture);
Texture(const MyTexture& texture,const osg::CopyOp&
copyop=osg::CopyOp::SHALLOW_COPY);
virtual osg::Object*
cloneType() const;
virtual osg::Object*
clone(const osg::CopyOp& copyop) const;
virtual bool
isSameKindAs(const osg::Object* pObj) const;
virtual const char*
libraryName() const;
virtual const char*
className() const;
private:
Texture &operator=(constMyTexture& other); // No copy
protected:
virtual ~Texture();
public:
CustomerGL::Texture*
CustomerGLTexture() const;
void
setCustomerGLTexture(CustomerGL* pGLBoxTexture);
virtual osg::StateAttribute::Type
getType() const;
virtual bool
isTextureAttribute() const;
virtual int
compare(const osg::StateAttribute&
stateAttribute) const;
virtual bool
getModeUsage(osg::StateAttribute::ModeUsage& modeUsage)
const;
virtual void
apply(osg::State& state) const;
virtual void
compileGLObjects(osg::State& state) const;
virtual void
resizeGLObjectBuffers(unsigned int maxSize);
virtual void
releaseGLObjects(osg::State* pState=NULL) const;
};
The virtual methods are pretty simple to implement : have a look to
osg::Texture2D implementations.
By subclassing "osg::StateAttribute" and not "osg::Texture", I'm sure that all
OSG algorithms (such as texture resizing) will not be applied to MyTexture
class.
Cheers,
Aurelien
------------------
Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=56673#56673
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