Hi Mark,
I don't recall any bug fixes on this topic. The Texture code should
in theory reallocate when the sizes changes, and I'm sure I've
previously added code to do this. Perhaps the awkward usage of the
OSG is what is causing the a crack to appear in the algorithm used.
I must say that your code is pretty perverse (using two viewers single
threaded in the same main loop), is there a reason why you have two
viewers in this code? Can't you just use CompositeViewer to do this,
it's the class written to manage this type of application usage. I
don't know whether this has barring on the problem, but it might.
Robert.
On Mon, Dec 15, 2008 at 5:16 PM, Mark Sciabica <msciab...@itracs.com> wrote:
> Hi Robert,
>
> (I'm replying again for the benefit of those with threaded mail readers, and
> so this thread won't be forgotten...)
>
> I'm using osg version 2.6.0.
>
> Mark
>
> Robert Osfield wrote:
>
> HI Mark,
>
> I've previous used the ability of resizing images and it did have it
> working. I did require a bug fix, but this was done a while back.
>
> Which version of the OSG are you using?
>
> Robert.
>
> On Thu, Dec 11, 2008 at 10:48 PM, Mark Sciabica <msciab...@itracs.com>
> wrote:
>
>
> Hello Robert,
>
> I have found a bug when assigning a new image to an existing texture that
> already has an OpenGL texture object allocated. The problem appears to be
> that Texture2D::apply is passing the wrong dimensions in to
> applyTexImage2D_subload. Since the dimensions of the image don't match the
> dimensions of the existing OpenGL texture object, subloading shouldn't even
> be used. I therefore get the following error printed out on the console:
>
> Warning: detected OpenGL error 'invalid value' after RenderBin::draw(,)
>
> The dimensions of the Texture::TextureObject should be validated against the
> data being loaded before calling subload, probably in the Texture*::apply
> methods.
>
> Mark
>
> #include <osg/Texture2D>
> #include <osg/Geometry>
>
> #include <osgViewer/Viewer>
> #include <osgGA/TrackballManipulator>
>
> int main()
> {
> osg::ref_ptr<osg::Texture2D> texture1 = new osg::Texture2D;
> static unsigned char bytes[16] = {
> 0xff, 0x00, 0x00, 0xff,
> 0x00, 0xff, 0x00, 0xff,
> 0x00, 0x00, 0xff, 0xff,
> 0xff, 0x00, 0xff, 0xff,
> };
> osg::ref_ptr<osg::Image> imageRGB = new osg::Image;
> imageRGB->setImage(3, 1, 1, GL_RGBA8, GL_RGBA, GL_UNSIGNED_BYTE,
> &bytes[0], osg::Image::NO_DELETE, 1);
> osg::ref_ptr<osg::Image> imageRed = new osg::Image;
> imageRed->setImage(1, 1, 1, GL_RGBA8, GL_RGBA, GL_UNSIGNED_BYTE,
> &bytes[0], osg::Image::NO_DELETE, 1);
> osg::ref_ptr<osg::Image> imageGreen = new osg::Image;
> imageGreen->setImage(1, 1, 1, GL_RGBA8, GL_RGBA, GL_UNSIGNED_BYTE,
> &bytes[4], osg::Image::NO_DELETE, 1);
> osg::ref_ptr<osg::Image> imageBlue = new osg::Image;
> imageBlue->setImage(1, 1, 1, GL_RGBA8, GL_RGBA, GL_UNSIGNED_BYTE,
> &bytes[8], osg::Image::NO_DELETE, 1);
>
>
> osg::ref_ptr<osg::Geode> geode = new osg::Geode();
> osg::ref_ptr<osg::Geometry> geom = new osg::Geometry();
> geode->addDrawable(geom.get());
>
> osg::ref_ptr<osg::Vec3Array> pVertices = new osg::Vec3Array;
> pVertices->push_back( osg::Vec3(0, 0, 0) );
> pVertices->push_back( osg::Vec3(0, 0, 1) );
> pVertices->push_back( osg::Vec3(1, 0, 1) );
> pVertices->push_back( osg::Vec3(1, 0, 0) );
> geom->setVertexArray(pVertices.get());
>
> osg::ref_ptr<osg::Vec2Array> pTexCoords = new osg::Vec2Array;
> pTexCoords->push_back( osg::Vec2(0, 0) );
> pTexCoords->push_back( osg::Vec2(0, 1) );
> pTexCoords->push_back( osg::Vec2(1, 1) );
> pTexCoords->push_back( osg::Vec2(1, 0) );
> geom->setTexCoordArray(0, pTexCoords.get());
> osg::ref_ptr<osg::DrawArrays> pDrawArrays = new osg::DrawArrays(GL_QUADS,
> 0, 4);
> geom->addPrimitiveSet(pDrawArrays.get());
>
> osg::StateSet* stateset = new osg::StateSet();
> stateset->setMode(GL_LIGHTING, osg::StateAttribute::OFF);
> stateset->setTextureAttributeAndModes(0, texture1.get(),
> osg::StateAttribute::ON);
> geode->setStateSet( stateset );
> texture1->setImage(imageGreen.get());
> texture1->setWrap(osg::Texture::WRAP_S, osg::Texture::CLAMP_TO_EDGE);
> texture1->setWrap(osg::Texture::WRAP_T, osg::Texture::CLAMP_TO_EDGE);
> texture1->setResizeNonPowerOfTwoHint(false);
> texture1->setFilter( osg::Texture::MAG_FILTER, osg::Texture::NEAREST );
> texture1->setFilter( osg::Texture::MIN_FILTER, osg::Texture::NEAREST );
>
>
> osg::ref_ptr<osgViewer::Viewer> viewer1 = new osgViewer::Viewer;
> osg::ref_ptr<osgViewer::Viewer> viewer2 = new osgViewer::Viewer;
> viewer1->setUpViewInWindow(20, 50, 200, 200);
> viewer2->setUpViewInWindow(240, 300, 200, 200);
> viewer1->setThreadingModel(osgViewer::ViewerBase::SingleThreaded);
> viewer2->setThreadingModel(osgViewer::ViewerBase::SingleThreaded);
>
> viewer1->setSceneData( geode.get() );
> viewer2->setSceneData( geode.get() );
>
> viewer1->setCameraManipulator(new osgGA::TrackballManipulator());
> viewer2->setCameraManipulator(new osgGA::TrackballManipulator());
>
> int nFrame = 0;
> while( viewer1.get() || viewer2.get() )
> {
> if( viewer1.get() )
> {
> if( !viewer1->done() )
> viewer1->frame();
> else
> viewer1 = 0;
> }
>
> texture1->setImage(imageRGB.get());
> if( viewer2.get() )
> {
> if( !viewer2->done() )
> viewer2->frame();
> else
> viewer2 = 0;
> }
>
> ++nFrame;
> }
>
> return 0;
> }
>
>
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