Added Logos loader
This commit is contained in:
Don BURNS
13
src/osgPlugins/logos/Makefile
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13
src/osgPlugins/logos/Makefile
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@@ -0,0 +1,13 @@
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TOPDIR = ../../..
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include $(TOPDIR)/Make/makedefs
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CXXFILES =\
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ReaderWriterLOGO.cpp\
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LIBS += $(OSG_LIBS) $(OTHER_LIBS)
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TARGET_BASENAME = logo
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include $(TOPDIR)/Make/cygwin_plugin_def
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PLUGIN = $(PLUGIN_PREFIX)$(TARGET_BASENAME).$(PLUGIN_EXT)
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include $(TOPDIR)/Make/makerules
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224
src/osgPlugins/logos/ReaderWriterLOGO.cpp
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224
src/osgPlugins/logos/ReaderWriterLOGO.cpp
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@@ -0,0 +1,224 @@
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#include <stdio.h>
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#include <osg/Geode>
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#include <osg/Drawable>
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#include <osg/BlendFunc>
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#include <osg/StateSet>
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#include <osg/Notify>
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#include <osg/Viewport>
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#include <osgDB/ReadFile>
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#include <osgDB/FileUtils>
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#include <osgDB/FileNameUtils>
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#include <osgDB/Registry>
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#include <osgDB/Input>
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#include <osgDB/Output>
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#include <osgUtil/CullVisitor>
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using namespace osg;
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using namespace osgDB;
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class Logos: public osg::Drawable
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{
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public:
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enum RelativePosition{
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Center,
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UpperLeft,
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UpperRight,
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LowerLeft,
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LowerRight,
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UpperCenter,
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LowerCenter,
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last_position
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};
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struct logosCullCallback : public osg::Drawable::CullCallback
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{
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virtual bool cull(osg::NodeVisitor *visitor, osg::Drawable* drawable, osg::State *state=NULL) const
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{
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Logos *logos = dynamic_cast <Logos *>(drawable);
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osgUtil::CullVisitor *cv = dynamic_cast<osgUtil::CullVisitor *>(visitor);
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if( logos != NULL && cv != NULL )
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{
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osg::Viewport *vp = cv->getViewport();
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if( vp != NULL )
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{
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int x, y, aw, ah, bw, bh;
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logos->getViewport()->getViewport( x, y, aw, ah );
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vp->getViewport(x, y, bw, bh );
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if( aw != bw || ah != bh )
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{
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logos->getViewport()->setViewport( x, y, bw, bh );
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logos->dirtyDisplayList();
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}
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}
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}
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return false;
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}
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};
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Logos()
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{
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osg::StateSet *sset = new osg::StateSet;
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osg::BlendFunc *transp = new osg::BlendFunc;
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transp->setFunction(GL_SRC_ALPHA,GL_ONE_MINUS_SRC_ALPHA);
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sset->setAttribute( transp );
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sset->setMode( GL_BLEND, osg::StateAttribute::ON );
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sset->setMode( GL_DEPTH_TEST, osg::StateAttribute::OFF );
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sset->setRenderBinDetails( StateSet::TRANSPARENT_BIN + 1 , "RenderBin" );
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setStateSet( sset );
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viewport = new osg::Viewport;
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setCullCallback( new logosCullCallback );
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}
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Logos(const Logos& logo, const CopyOp& copyop=CopyOp::SHALLOW_COPY) :Drawable( logo, copyop ) {}
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virtual Object* cloneType() const { return new Logos(); }
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virtual Object* clone( const CopyOp& copyop) const { return new Logos(*this, copyop ); }
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virtual bool isSameKindAs(const Object* obj) const { return dynamic_cast<const Logos*>(obj)!=NULL; }
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virtual const char* className() const { return "Logos"; }
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virtual void drawImmediateMode( osg::State &state )
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{
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int x = 0, y = 0, w = 1, h = 1;
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if( viewport != NULL )
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viewport->getViewport( x, y, w, h );
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float vx = x;
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float vy = y;
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float vw = w;
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float vh = h;
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glMatrixMode( GL_PROJECTION );
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glPushMatrix();
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glLoadIdentity();
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glOrtho( 0.0, vw, 0.0, vh, -1.0, 1.0 );
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glMatrixMode( GL_MODELVIEW );
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glPushMatrix();
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glLoadIdentity();
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vector <osg::Image *>::iterator p;
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float th = 0.0;
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for( p = logos[Center].begin(); p != logos[Center].end(); p++ )
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th += (*p)->t();
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float place[][4] = {
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{ vw*0.5, ((vh*0.5) + th*0.5), -0.5, -1.0 },
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{ vx, vh, 0.0, -1.0 },
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{ vw, vh, -1.0, -1.0 },
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{ vx, vy, 0.0, 1.0 },
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{ vw, vy, -1.0, 1.0 },
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{ vw*0.5, vh , -0.5, -1.0 },
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{ vw*0.5, 0.0 , -0.5, 1.0 },
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};
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for( int i = Center; i < last_position; i++ )
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{
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if( logos[i].size() != 0 )
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{
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float x = place[i][0];
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float y = place[i][1];
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float xi = place[i][2];
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float yi = place[i][3];
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for( p = logos[i].begin(); p != logos[i].end(); p++ )
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{
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osg::Image *img = *p;
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x = place[i][0] + xi * img->s();
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if( i == Center || i == UpperLeft || i == UpperRight || i == UpperCenter)
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y += yi * img->t();
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glRasterPos2f( x, y );
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glDrawPixels( img->s(), img->t(), img->getPixelFormat(), img->getDataType(), img->data() );
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if( i == LowerLeft || i == LowerRight || i == LowerCenter)
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y += yi * img->t();
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}
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}
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}
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glPopMatrix();
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glMatrixMode( GL_PROJECTION );
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glPopMatrix();
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glMatrixMode( GL_MODELVIEW );
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}
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void addLogo( RelativePosition pos, std::string name )
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{
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osg::Image *image = osgDB::readImageFile( name.c_str() );
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if( image != NULL )
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logos[pos].push_back( image );
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}
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osg::Viewport *getViewport() { return viewport; }
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protected:
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Logos(const Logos&):Drawable() {}
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Logos& operator = (const Logos&) { return *this;}
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virtual ~Logos() {}
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virtual const bool computeBound() const
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{
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_bbox.set( -1, -1, -1, 1, 1, 1 );
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return true;
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}
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private :
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vector <osg::Image *> logos[last_position];
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osg::Viewport *viewport;
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};
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class LOGOReaderWriter : public osgDB::ReaderWriter
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{
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public:
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virtual const char* className() { return "Logo Database Reader/Writer"; }
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virtual bool acceptsExtension(const std::string& extension)
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{
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return osgDB::equalCaseInsensitive(extension,"logo");
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}
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virtual ReadResult readNode(const std::string& fileName, const osgDB::ReaderWriter::Options*)
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{
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std::string ext = osgDB::getLowerCaseFileExtension(fileName);
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if (!acceptsExtension(ext)) return ReadResult::FILE_NOT_HANDLED;
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osg::notify(osg::INFO)<< "ReaderWriterLOGO::readNode( "<<fileName.c_str()<<" )\n";
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osg::Geode *geode = new osg::Geode;
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Logos* ld = new Logos;
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geode->addDrawable( ld );
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Logos::RelativePosition pos = Logos::LowerRight;
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filebuf fb;
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fb.open( fileName.c_str(), "r");
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istream in(&fb);
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while( !in.eof() )
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{
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std::string str;
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in>> str;
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if( str == "Center" )
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pos = Logos::Center;
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else if( str == "UpperLeft" )
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pos = Logos::UpperLeft;
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else if( str == "UpperRight" )
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pos = Logos::UpperRight;
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else if( str == "LowerLeft" )
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pos = Logos::LowerLeft;
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else if( str == "LowerRight" )
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pos = Logos::LowerRight;
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else if( str == "UpperCenter" )
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pos = Logos::UpperCenter;
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else if( str == "LowerCenter" )
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pos = Logos::LowerCenter;
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else
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ld->addLogo( pos, str );
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}
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return geode;
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}
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};
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// now register with Registry to instantiate the above
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// reader/writer.
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osgDB::RegisterReaderWriterProxy<LOGOReaderWriter> g_LOGOReaderWriterProxy;
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