FGFS-4.1/OpenSceneGraph
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Added support for setting up VisualChoose with destination alpha, stencil and

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quad buffers attributes from DisplaySettings values.
This commit is contained in:
Robert Osfield
2003-03-20 14:07:03 +00:00
parent 38a2408847
commit 0476348a0c
5 changed files with 64 additions and 10 deletions
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4
src/osg/DisplaySettings.cpp
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@@ -99,11 +99,7 @@ void DisplaySettings::setDefaults()
_minimumNumberAlphaBits = 0;
_minimumNumberStencilBits = 0;
#ifdef __sgi
_maxNumOfGraphicsContexts = 4;
#else
_maxNumOfGraphicsContexts = 1;
#endif
}
ApplicationUsageProxy e0(ApplicationUsage::ENVIRONMENTAL_VARIABLE,"OSG_STEREO_MODE <mode>","QUAD_BUFFER | ANAGLYPHIC | HORIZONTAL_SPLIT | VERTICAL_SPLIT | LEFT_EYE | RIGHT_EYE");

10
src/osg/Image.cpp
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@@ -95,10 +95,12 @@ int Image::compare(const Image& rhs) const
COMPARE_StateAttribute_Parameter(_packing)
COMPARE_StateAttribute_Parameter(_modifiedTag)
// still need implement checks for
// _data
// _mipmapData
if (_data<rhs._data) return -1;
if (_data>rhs._data) return 1;
if (_mipmapData<rhs._mipmapData) return -1;
if (_mipmapData>rhs._mipmapData) return 1;
return 0;
}

56
src/osgProducer/OsgCameraGroup.cpp
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@@ -12,6 +12,7 @@
*/
#include <osg/ApplicationUsage>
#include <osgUtil/DisplayRequirementsVisitor>
#include <osgDB/FileUtils>
#include <osgProducer/OsgCameraGroup>
@@ -224,16 +225,71 @@ void OsgCameraGroup::realize( ThreadingModel thread_model)
_ds->setMaxNumberOfGraphicsContexts( _cfg->getNumberOfCameras() );
_shvec.clear();
osg::Node* node = getTopMostSceneData();
if (node)
{
// traverse the scene graphs gathering the requirements of the OpenGL buffers.
osgUtil::DisplayRequirementsVisitor drv;
drv.setDisplaySettings(_ds.get());
node->accept(drv);
}
unsigned int numMultiSamples = 0;
#ifdef __sgi
// switch on anti-aliasing by default, just in case we have an Onyx :-)
numMultiSamples = 4;
#endif
// set up each render stage to clear the appropriate buffers.
GLbitfield clear_mask=0;
if (_ds->getRGB()) clear_mask |= GL_COLOR_BUFFER_BIT;
if (_ds->getDepthBuffer()) clear_mask |= GL_DEPTH_BUFFER_BIT;
if (_ds->getStencilBuffer()) clear_mask |= GL_STENCIL_BUFFER_BIT;
for( unsigned int i = 0; i < _cfg->getNumberOfCameras(); i++ )
{
Producer::Camera *cam = _cfg->getCamera(i);
// create the scene handler.
osgProducer::OsgSceneHandler *sh = new osgProducer::OsgSceneHandler(_ds.get());
sh->setDefaults();
_shvec.push_back( sh );
cam->setSceneHandler( sh );
// set up the clear mask.
osgUtil::RenderStage *stage = sh->getRenderStage();
if (stage) stage->setClearMask(clear_mask);
// set the realize callback.
Producer::RenderSurface* rs = cam->getRenderSurface();
rs->setRealizeCallback( new RenderSurfaceRealizeCallback(this, sh));
// set up the visual chooser.
if (_ds.valid() || numMultiSamples!=0)
{
Producer::VisualChooser* rs_vc = rs->getVisualChooser();
if (!rs_vc)
{
rs_vc = new Producer::VisualChooser;
rs_vc->setSimpleConfiguration();
rs->setVisualChooser(rs_vc);
}
if (_ds->getStereo() && _ds->getStereoMode()==osg::DisplaySettings::QUAD_BUFFER) rs_vc->useStereo();
if (_ds->getStencilBuffer()) rs_vc->setStencilSize(_ds->getMinimumNumStencilBits());
if (_ds->getAlphaBuffer()) rs_vc->setAlphaSize(_ds->getMinimumNumAlphaBits());
if (numMultiSamples)
{
#if defined( GLX_SAMPLES_SGIS )
rs_vc->addExtendedAttribute( GLX_SAMPLES_SGIS, numMultiSamples);
#endif
#if defined( GLX_SAMPLES_BUFFER_SGIS )
rs_vc->addExtendedAttribute( GLX_SAMPLES_BUFFER_SGIS, 1);
#endif
}
}
}
if( _global_stateset == NULL && _shvec.size() > 0 )