235 lines
9.1 KiB
C++
235 lines
9.1 KiB
C++
/* -*-c++-*-
|
|
* Copyright (C) 2018 Julien Valentin <mp3butcher@hotmail.com>
|
|
*
|
|
* This library is open source and may be redistributed and/or modified under
|
|
* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
|
|
* (at your option) any later version. The full license is in LICENSE file
|
|
* included with this distribution, and on the openscenegraph.org website.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* OpenSceneGraph Public License for more details.
|
|
*/
|
|
|
|
|
|
#include <osg/Program>
|
|
#include <osg/Sampler>
|
|
#include <osg/Texture2D>
|
|
#include <osg/ShapeDrawable>
|
|
#include <osgViewer/Viewer>
|
|
#include <osgViewer/ViewerEventHandlers>
|
|
#include <osgGA/TrackballManipulator>
|
|
|
|
#include <osgDB/ReadFile>
|
|
#include <osgDB/WriteFile>
|
|
#include <osgUtil/Optimizer>
|
|
|
|
/// add two composite texture color
|
|
static const char* fragSource =
|
|
{
|
|
"uniform sampler2D tex1;\n"
|
|
"uniform sampler2D tex2;\n"
|
|
"void main(){\n"
|
|
" vec4 color1 = texture2D(tex1,gl_TexCoord[0].st);\n"
|
|
" vec4 color2 = texture2D(tex2,gl_TexCoord[0].st);\n"
|
|
" gl_FragColor = vec4(color1.xyz+color2.xyz,1.0);\n"
|
|
"}\n"
|
|
};
|
|
|
|
|
|
class SamplersKeyboardEventHandler : public osgGA::GUIEventHandler
|
|
{
|
|
public:
|
|
SamplersKeyboardEventHandler(osg::Sampler* tessInnerU, osg::Sampler* tessOuterU):
|
|
_sampler1(tessInnerU),
|
|
_sampler2(tessOuterU){}
|
|
|
|
virtual bool handle(const osgGA::GUIEventAdapter& ea,osgGA::GUIActionAdapter& gaa)
|
|
{
|
|
osg::Texture:: FilterMode newone=osg::Texture::NEAREST;
|
|
if(ea.getEventType()==osgGA::GUIEventAdapter::KEYDOWN)
|
|
{
|
|
switch (ea.getKey())
|
|
{
|
|
case osgGA::GUIEventAdapter::KEY_A:
|
|
if(_sampler1->getFilter(osg::Texture::MAG_FILTER)==osg::Texture::NEAREST)
|
|
newone=osg::Texture::LINEAR;
|
|
_sampler1->setFilter(osg::Texture::MAG_FILTER,newone);
|
|
_sampler1->setFilter(osg::Texture::MIN_FILTER,newone);
|
|
return true;
|
|
case osgGA::GUIEventAdapter::KEY_B:
|
|
if(_sampler2->getFilter(osg::Texture::MAG_FILTER)==osg::Texture::NEAREST)
|
|
newone=osg::Texture::LINEAR;
|
|
_sampler2->setFilter(osg::Texture::MAG_FILTER,newone);
|
|
_sampler2->setFilter(osg::Texture::MIN_FILTER,newone);
|
|
return true;
|
|
}
|
|
}
|
|
return osgGA::GUIEventHandler::handle(ea, gaa);
|
|
}
|
|
|
|
private:
|
|
osg::Sampler* _sampler1;
|
|
osg::Sampler* _sampler2;
|
|
|
|
};
|
|
|
|
class StateCollec: public osg::NodeVisitor{
|
|
public:
|
|
StateCollec():osg::NodeVisitor(osg::NodeVisitor::TRAVERSE_ALL_CHILDREN){}
|
|
virtual void apply(osg::Node& node){
|
|
osg::StateSet *ss=node.getStateSet();
|
|
if(ss) _statesets.insert(ss);
|
|
traverse(node);
|
|
}
|
|
std::set<osg::StateSet*> _statesets;
|
|
std::set<osg::StateSet*> & getStateSets(){return _statesets;}
|
|
};
|
|
|
|
int main(int argc, char* argv[])
|
|
{
|
|
osg::ArgumentParser arguments(&argc,argv);
|
|
arguments.getApplicationUsage()->setApplicationName(arguments.getApplicationName());
|
|
arguments.getApplicationUsage()->setDescription(arguments.getApplicationName()+" is the standard OpenSceneGraph example for GL3 sampler.");
|
|
osg::ApplicationUsage::UsageMap kmap;
|
|
kmap["a"]="swap Linear/Nearest filtering on first texture";
|
|
kmap["b"]="swap Linear/Nearest filtering on second texture";
|
|
arguments.getApplicationUsage()->setKeyboardMouseBindings(kmap);
|
|
|
|
osgViewer::Viewer viewer(arguments);
|
|
osg::ref_ptr<osg::Program> program = new osg::Program();
|
|
program->addShader(new osg::Shader(osg::Shader::FRAGMENT,fragSource));
|
|
|
|
osg::ref_ptr<osg::Node> loadedModel = osgDB::readRefNodeFiles(arguments);
|
|
osg::ref_ptr<osg::Node> geode ;
|
|
|
|
osg::ref_ptr<osg::Sampler > sampler1, sampler2;
|
|
if (loadedModel)
|
|
{
|
|
///ensure loaded have Sampler
|
|
geode=loadedModel;
|
|
StateCollec sc;
|
|
geode->accept(sc);
|
|
for(std::set<osg::StateSet*>::iterator it=sc.getStateSets().begin();it != sc.getStateSets().end(); ++it)
|
|
{
|
|
osg::Sampler::generateSamplerObjects(*(*it));
|
|
if(!sampler1.valid())
|
|
sampler1 = sampler2 = (osg::Sampler*)(*it)->getTextureAttribute(0, osg::StateAttribute::SAMPLER);
|
|
else
|
|
sampler2=(osg::Sampler*)(*it)->getTextureAttribute(0, osg::StateAttribute::SAMPLER);
|
|
}
|
|
if(sampler1.valid()&&sampler2.valid()){
|
|
OSG_WARN<<"2samplers manipulator setted"<<std::endl;
|
|
viewer.addEventHandler(new SamplersKeyboardEventHandler(sampler1, sampler2));
|
|
}
|
|
}
|
|
else
|
|
{
|
|
///createQuadWith2TexturesMix
|
|
geode = new osg::Geode;
|
|
((osg::Geode*)geode.get())->addDrawable(osg::createTexturedQuadGeometry(osg::Vec3(0,0,0),osg::Vec3(1,0,0),osg::Vec3(0,0,1) ));
|
|
|
|
osg::ref_ptr< osg::Texture2D> tex1, tex2;
|
|
|
|
tex1=new osg::Texture2D();
|
|
tex2=new osg::Texture2D();
|
|
|
|
sampler1=new osg::Sampler();
|
|
sampler2=new osg::Sampler();
|
|
|
|
osg::Vec2ui resolution(4,4);
|
|
{
|
|
///first texture//NO RED
|
|
unsigned char *data = new unsigned char[(resolution.x()* resolution.y()) * 4];
|
|
unsigned char * ptr=data;
|
|
unsigned int sw=0, cptx=0;
|
|
while (ptr != data + sizeof(unsigned char)*(resolution.x()* resolution.y()) * 4)
|
|
{
|
|
if(sw==1)
|
|
{
|
|
*ptr++=0; *ptr++=0xff; *ptr++=0xff; *ptr++=0xff;
|
|
}
|
|
else
|
|
{
|
|
*ptr++=0; *ptr++=0; *ptr++=0; *ptr++=0xff;
|
|
}
|
|
if(++cptx<resolution.x())sw=sw?0:1;
|
|
else cptx=0;
|
|
}
|
|
osg::ref_ptr<osg::Image >im = new osg::Image();
|
|
im->setImage(resolution.x(), resolution.y(), 1,GL_RGBA, GL_RGBA, GL_UNSIGNED_BYTE, data, osg::Image::USE_NEW_DELETE);
|
|
im->dirty();
|
|
tex1->setImage(im);
|
|
}
|
|
{
|
|
///second texture// RED ONLY
|
|
unsigned char *data = new unsigned char[(resolution.x()* resolution.y()) * 4];
|
|
unsigned char * ptr=data;
|
|
unsigned int sw=0,cptx=0;
|
|
while (ptr != data + sizeof(unsigned char)*(resolution.x()* resolution.y()) * 4)
|
|
{
|
|
if(sw==1)
|
|
{
|
|
*ptr++=255; *ptr++=0; *ptr++=0; *ptr++=255;
|
|
}
|
|
else
|
|
{
|
|
*ptr++=0; *ptr++=0; *ptr++=0; *ptr++=255;
|
|
}
|
|
if(++cptx<resolution.x())sw=sw?0:1;
|
|
else cptx=0;
|
|
}
|
|
osg::ref_ptr<osg::Image >im = new osg::Image();
|
|
im->setImage(resolution.x(), resolution.y(), 1,GL_RGBA, GL_RGBA, GL_UNSIGNED_BYTE, data, osg::Image::USE_NEW_DELETE);
|
|
im->dirty();
|
|
tex2->setImage(im);
|
|
}
|
|
///Overrided Filtering setup
|
|
tex1->setFilter(osg::Texture::MAG_FILTER,osg::Texture::NEAREST);
|
|
tex1->setFilter(osg::Texture::MIN_FILTER,osg::Texture::NEAREST);
|
|
|
|
tex2->setFilter(osg::Texture::MAG_FILTER,osg::Texture::NEAREST);
|
|
tex2->setFilter(osg::Texture::MIN_FILTER,osg::Texture::NEAREST);
|
|
|
|
///Filter Override samplers setup
|
|
sampler1->setFilter(osg::Texture::MAG_FILTER,osg::Texture::LINEAR);
|
|
sampler1->setFilter(osg::Texture::MIN_FILTER,osg::Texture::LINEAR);
|
|
|
|
sampler2->setFilter(osg::Texture::MAG_FILTER,osg::Texture::LINEAR);
|
|
sampler2->setFilter(osg::Texture::MIN_FILTER,osg::Texture::LINEAR);
|
|
|
|
|
|
osg::StateSet *ss;
|
|
ss = geode->getOrCreateStateSet();
|
|
|
|
ss->setTextureAttribute(0, tex1,osg::StateAttribute::ON);
|
|
ss->setTextureAttribute(1, tex2,osg::StateAttribute::ON);
|
|
//#define TEST_SAMPLER_OBJECT_AUTO_PORT 1
|
|
#ifdef TEST_SAMPLER_OBJECT_AUTO_PORT
|
|
|
|
osg::Sampler::generateSamplerObjects(*ss)
|
|
if(
|
|
(sampler1= static_cast<osg::Sampler*>(ss->getTextureAttribute(0,osg::StateAttribute::SAMPLER)))&&
|
|
(sampler2= static_cast<osg::Sampler*>(ss->getTextureAttribute(1,osg::StateAttribute::SAMPLER)))
|
|
)
|
|
OSG_WARN<<"both samplers are generated"<<std::endl;
|
|
#else
|
|
ss->setTextureAttribute(0,sampler1,osg::StateAttribute::ON);
|
|
ss->setTextureAttribute(1,sampler2,osg::StateAttribute::ON);
|
|
#endif
|
|
ss->addUniform(new osg::Uniform("tex1",(int)0));
|
|
ss->addUniform(new osg::Uniform("tex2",(int)1));
|
|
ss->setAttribute(program.get());
|
|
|
|
viewer.addEventHandler(new SamplersKeyboardEventHandler(sampler1, sampler2));
|
|
}
|
|
|
|
viewer.addEventHandler(new osgViewer::StatsHandler);
|
|
viewer.addEventHandler(new osgViewer::HelpHandler(arguments.getApplicationUsage()));
|
|
viewer.addEventHandler(new osgViewer::WindowSizeHandler());
|
|
|
|
viewer.setSceneData(geode.get());
|
|
return viewer.run();
|
|
}
|