simgear/scene/model/model.cxx

   1 // model.cxx - manage a 3D aircraft model.
   2 // Written by David Megginson, started 2002.
   3 //
   4 // This file is in the Public Domain, and comes with no warranty.
   5
   6 #ifdef HAVE_CONFIG_H
   7 #include <simgear_config.h>
   8 #endif
   9
  10 #include <osg/ref_ptr>
  11 #include <osgDB/ReadFile>
  12 #include <osgDB/SharedStateManager>
  13
  14 #include <simgear/scene/util/SGSceneFeatures.hxx>
  15
  16 #include <simgear/structure/exception.hxx>
  17 #include <simgear/props/props.hxx>
  18 #include <simgear/props/props_io.hxx>
  19 #include <simgear/props/condition.hxx>
  20
  21 #include "model.hxx"
  22
  23 SG_USING_STD(vector);
  24
  25 osg::Texture2D*
  26 SGLoadTexture2D(bool staticTexture, const std::string& path,
  27                 const osgDB::ReaderWriter::Options* options,
  28                 bool wrapu, bool wrapv, int)
  29 {
  30   osg::Image* image;
  31   if (options)
  32     image = osgDB::readImageFile(path, options);
  33   else
  34     image = osgDB::readImageFile(path);
  35   osg::ref_ptr<osg::Texture2D> texture = new osg::Texture2D;
  36   texture->setImage(image);
  37   if (staticTexture)
  38     texture->setDataVariance(osg::Object::STATIC);
  39   if (wrapu)
  40     texture->setWrap(osg::Texture::WRAP_S, osg::Texture::REPEAT);
  41   else
  42     texture->setWrap(osg::Texture::WRAP_S, osg::Texture::CLAMP);
  43   if (wrapv)
  44     texture->setWrap(osg::Texture::WRAP_T, osg::Texture::REPEAT);
  45   else
  46     texture->setWrap(osg::Texture::WRAP_T, osg::Texture::CLAMP);
  47
  48   if (image) {
  49     int s = image->s();
  50     int t = image->t();
  51
  52     if (s <= t && 32 <= s) {
  53       SGSceneFeatures::instance()->setTextureCompression(texture.get());
  54     } else if (t < s && 32 <= t) {
  55       SGSceneFeatures::instance()->setTextureCompression(texture.get());
  56     }
  57   }
  58
  59   // Make sure the texture is shared if we already have the same texture
  60   // somewhere ...
  61   {
  62     osg::ref_ptr<osg::Node> tmpNode = new osg::Node;
  63     osg::StateSet* stateSet = tmpNode->getOrCreateStateSet();
  64     stateSet->setTextureAttribute(0, texture.get());
  65
  66     // OSGFIXME: don't forget that mutex here
  67     osgDB::Registry* registry = osgDB::Registry::instance();
  68     registry->getSharedStateManager()->share(tmpNode.get(), 0);
  69
  70     // should be the same, but be paranoid ...
  71     stateSet = tmpNode->getStateSet();
  72     osg::StateAttribute* stateAttr;
  73     stateAttr = stateSet->getTextureAttribute(0, osg::StateAttribute::TEXTURE);
  74     osg::Texture2D* texture2D = dynamic_cast<osg::Texture2D*>(stateAttr);
  75     if (texture2D)
  76       texture = texture2D;
  77   }
  78
  79   return texture.release();
  80 }
  81
  82 // end of model.cxx