ReadResult readNode(const std::string& fileName, const osgDB::ReaderWriter::Options* /*options*/) const
{
std::string ext( osgDB::getLowerCaseFileExtension(fileName) );
if( !acceptsExtension(ext) )
return ReadResult::FILE_NOT_HANDLED;
osg::notify(osg::INFO) << "ReaderWriterGLOBE( \"" << fileName << "\" )" << std::endl;
// strip the ".globe" pseudo-loader extension
std::string tmpName( osgDB::getNameLessExtension(fileName) );
// get the next "extension", which actually contains the globe radius parameter
std::string params( osgDB::getFileExtension(tmpName) );
if( params.empty() )
{
osg::notify(osg::WARN) << "Missing parameters for " EXTENSION_NAME " pseudo-loader" << std::endl;
return ReadResult::FILE_NOT_HANDLED;
}
// strip the "params extension", which must leave an image subfilename.
std::string subFileName( osgDB::getNameLessExtension(tmpName) );
if( subFileName.empty() || subFileName == tmpName )
{
osg::notify(osg::WARN) << "Missing image subfilename for " EXTENSION_NAME " pseudo-loader" << std::endl;
return ReadResult::FILE_NOT_HANDLED;
}
osg::notify(osg::INFO) << EXTENSION_NAME " params = \"" << params << "\"" << std::endl;
int radius;
int count( sscanf( params.c_str(), "%d", &radius ) );
if( count != 1 )
{
osg::notify(osg::WARN) << "Bad parameters for " EXTENSION_NAME " pseudo-loader: \"" << params << "\"" << std::endl;
return ReadResult::FILE_NOT_HANDLED;
}
// recursively load the image subfile.
osg::Image *image( osgDB::readImageFile(subFileName) );
if( !image )
{
// propagate the read failure upwards
osg::notify(osg::WARN) << "Image file \"" << subFileName << "\" could not be loaded" << std::endl;
return ReadResult::FILE_NOT_HANDLED;
}
// create an osg::Sphere for the globe geometry
osg::Geode* geode( new osg::Geode() );
geode->addDrawable(new osg::ShapeDrawable(new osg::Sphere(osg::Vec3(0,0,0), radius)));
// apply the image as a texture to the globe
osg::Texture2D* tex2d( new osg::Texture2D );
tex2d->setImage( image );
tex2d->setWrap( osg::Texture::WRAP_S, osg::Texture::REPEAT );
tex2d->setWrap( osg::Texture::WRAP_T, osg::Texture::REPEAT );
osg::StateSet* stateset( geode->getOrCreateStateSet() );
stateset->setTextureAttributeAndModes( 0, tex2d, osg::StateAttribute::ON );
return geode;
}
osg::ref_ptr<osg::Texture> TextureManager::getTexture(size_t idx, int16_t *xoffset, int16_t *yoffset, float *xscale, float *yscale)
{
auto iter = mTexCache.find(idx);
if(iter != mTexCache.end())
{
osg::ref_ptr<osg::Texture> tex;
if(iter->second.mTexture.lock(tex))
{
*xoffset = iter->second.mXOffset;
*yoffset = iter->second.mYOffset;
*xscale = iter->second.mXScale;
*yscale = iter->second.mYScale;
return tex;
}
}
int16_t x_offset, y_offset, x_scale, y_scale;
std::vector<osg::ref_ptr<osg::Image>> images = DFOSG::TexLoader::get().load(
idx, &x_offset, &y_offset, &x_scale, &y_scale, mCurrentPalette
);
*xoffset = x_offset;
*yoffset = y_offset;
*xscale = 1.0f + x_scale/256.0f;
*yscale = 1.0f + y_scale/256.0f;
if(images.empty())
return osg::ref_ptr<osg::Texture>();
osg::ref_ptr<osg::Texture> tex;
if(images.size() == 1)
{
osg::ref_ptr<osg::Texture2D> tex2d(new osg::Texture2D(images[0]));
tex2d->setTextureSize(images[0]->s(), images[0]->t());
tex = tex2d;
}
else
{
/* Multiframe textures would ideally be loaded as a Texture2DArray and
* animated by offseting the R texture coord. However, they don't work
* in the fixed-function pipeline.
*/
#if 0
osg::ref_ptr<osg::Texture2DArray> tex2darr(new osg::Texture2DArray());
tex2darr->setTextureSize(images[0]->s(), images[0]->t(), images.size());
tex2darr->setResizeNonPowerOfTwoHint(false);
for(size_t i = 0;i < images.size();++i)
tex2darr->setImage(i, images[i]);
tex = tex2darr;
#else
osg::ref_ptr<osg::Texture2D> tex2d(new osg::Texture2D(images[0]));
tex2d->setTextureSize(images[0]->s(), images[0]->t());
tex = tex2d;
#endif
}
tex->setResizeNonPowerOfTwoHint(false);
tex->setWrap(osg::Texture::WRAP_S, osg::Texture::REPEAT);
tex->setWrap(osg::Texture::WRAP_T, osg::Texture::REPEAT);
tex->setUnRefImageDataAfterApply(true);
// Filter should be configurable. Defaults to nearest to retain DF's pixely
// look (with linear mipmapping to reduce aliasing).
tex->setFilter(osg::Texture::MIN_FILTER, osg::Texture::NEAREST_MIPMAP_LINEAR);
tex->setFilter(osg::Texture::MAG_FILTER, osg::Texture::NEAREST);
mTexCache[idx] = TextureInfo{
tex, x_offset, y_offset, 1.0f + x_scale/256.0f, 1.0f + y_scale/256.0f
};
return tex;
}