292 lines
8.0 KiB
C++
292 lines
8.0 KiB
C++
/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2008 Robert Osfield
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*
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* This library is open source and may be redistributed and/or modified under
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* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
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* (at your option) any later version. The full license is in LICENSE file
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* included with this distribution, and on the openscenegraph.org website.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* OpenSceneGraph Public License for more details.
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*/
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#include "Exception.h"
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#include "Layer.h"
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#include "Locator.h"
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#include "Object.h"
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#include "Locator.h"
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#include "ImageLayer.h"
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#include "HeightFieldLayer.h"
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#include "CompositeLayer.h"
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#include "SwitchLayer.h"
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#include <osgDB/ReadFile>
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using namespace ive;
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void Layer::write(DataOutputStream* out)
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{
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// Write Layer's identification.
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out->writeInt(IVELAYER);
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// If the osg class is inherited by any other class we should also write this to file.
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osg::Object* object = dynamic_cast<osg::Object*>(this);
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if (object)
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((ive::Object*)(object))->write(out);
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else
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out_THROW_EXCEPTION("Layer::write(): Could not cast this osgLayer::Layer to an osg::Object.");
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if (out->getVersion() >= VERSION_0023)
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{
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out->writeLocator(getLocator());
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if (out->getVersion() >= VERSION_0034)
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{
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out->writeUInt(getMinFilter());
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out->writeUInt(getMagFilter());
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}
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else
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{
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out->writeUInt((getMagFilter()==osg::Texture::LINEAR) ? 1 : 0);
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}
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}
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else
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{
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LayerHelper helper;
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helper.writeLocator(out, getLocator());
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}
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out->writeUInt(getMinLevel());
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out->writeUInt(getMaxLevel());
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if (out->getVersion() >= VERSION_0027)
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{
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writeValidDataOperator(out,getValidDataOperator());
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}
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}
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void Layer::read(DataInputStream* in)
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{
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// Peek on Layer's identification.
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int id = in->peekInt();
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if (id != IVELAYER)
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in_THROW_EXCEPTION("Layer::read(): Expected Layer identification.");
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// Read Layer's identification.
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id = in->readInt();
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// If the osg class is inherited by any other class we should also read this from file.
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osg::Object* object = dynamic_cast<osg::Object*>(this);
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if(object)
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((ive::Object*)(object))->read(in);
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else
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in_THROW_EXCEPTION("Layer::read(): Could not cast this osgLayer::Layer to an osg::Group.");
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if (in->getVersion() >= VERSION_0023)
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{
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setLocator(in->readLocator());
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if (in->getVersion() >= VERSION_0034)
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{
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setMinFilter(osg::Texture::FilterMode(in->readUInt()));
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setMagFilter(osg::Texture::FilterMode(in->readUInt()));
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}
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else
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{
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setMagFilter(in->readUInt()==0 ? osg::Texture::NEAREST : osg::Texture::LINEAR);
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}
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}
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else
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{
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LayerHelper helper;
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setLocator(helper.readLocator(in));
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}
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setMinLevel(in->readUInt());
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setMaxLevel(in->readUInt());
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if (in->getVersion() >= VERSION_0027)
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{
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setValidDataOperator(readValidDataOperator(in));
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}
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}
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void LayerHelper::writeLayer(DataOutputStream* out, osgTerrain::Layer* layer)
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{
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if (layer)
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{
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out->writeBool(true);
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if (dynamic_cast<osgTerrain::HeightFieldLayer*>(layer))
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{
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((ive::HeightFieldLayer*)(layer))->write(out);
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}
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else if (dynamic_cast<osgTerrain::ImageLayer*>(layer))
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{
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((ive::ImageLayer*)(layer))->write(out);
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}
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else if (dynamic_cast<osgTerrain::SwitchLayer*>(layer))
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{
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((ive::SwitchLayer*)(layer))->write(out);
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}
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else if (dynamic_cast<osgTerrain::CompositeLayer*>(layer))
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{
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((ive::CompositeLayer*)(layer))->write(out);
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}
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else if (dynamic_cast<osgTerrain::ProxyLayer*>(layer))
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{
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out->writeInt(IVEPROXYLAYER);
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out->writeString(layer->getFileName());
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osgTerrain::Locator* locator = layer->getLocator();
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bool writeOutLocator = locator && !locator->getDefinedInFile();
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writeLocator(out, writeOutLocator ? locator : 0 );
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out->writeUInt(layer->getMinLevel());
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out->writeUInt(layer->getMaxLevel());
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}
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}
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else
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{
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out->writeBool(false);
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}
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}
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osgTerrain::Layer* LayerHelper::readLayer(DataInputStream* in)
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{
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bool layerExist = in->readBool();
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if (!layerExist) return 0;
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int id = in->peekInt();
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if (id==IVEHEIGHTFIELDLAYER)
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{
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osgTerrain::HeightFieldLayer* layer = new osgTerrain::HeightFieldLayer;
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((ive::HeightFieldLayer*)(layer))->read(in);
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return layer;
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}
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else if (id==IVEIMAGELAYER)
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{
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osgTerrain::ImageLayer* layer = new osgTerrain::ImageLayer;
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((ive::ImageLayer*)(layer))->read(in);
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return layer;
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}
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else if (id==IVESWITCHLAYER)
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{
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osgTerrain::SwitchLayer* layer = new osgTerrain::SwitchLayer;
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((ive::SwitchLayer*)(layer))->read(in);
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return layer;
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}
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else if (id==IVECOMPOSITELAYER)
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{
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osgTerrain::CompositeLayer* layer = new osgTerrain::CompositeLayer;
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((ive::CompositeLayer*)(layer))->read(in);
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return layer;
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}
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else if (id==IVEPROXYLAYER)
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{
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std::string filename = in->readString();
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osg::ref_ptr<osg::Object> object = osgDB::readObjectFile(filename+".gdal");
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osgTerrain::ProxyLayer* proxyLayer = dynamic_cast<osgTerrain::ProxyLayer*>(object.get());
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osg::ref_ptr<osgTerrain::Locator> locator = readLocator(in);
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unsigned int minLevel = in->readUInt();
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unsigned int maxLevel = in->readUInt();
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if (proxyLayer)
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{
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if (locator.valid()) proxyLayer->setLocator(locator.get());
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proxyLayer->setMinLevel(minLevel);
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proxyLayer->setMaxLevel(maxLevel);
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}
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return proxyLayer;
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}
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return new osgTerrain::ImageLayer;
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}
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void LayerHelper::writeLocator(DataOutputStream* out, osgTerrain::Locator* locator)
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{
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if (locator)
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{
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out->writeBool(true);
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((ive::Locator*)(locator))->write(out);
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}
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else
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{
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out->writeBool(false);
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}
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}
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osgTerrain::Locator* LayerHelper::readLocator(DataInputStream* in)
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{
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bool locatorExist = in->readBool();
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if (!locatorExist) return 0;
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osgTerrain::Locator* locator = new osgTerrain::Locator;
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((ive::Locator*)(locator))->read(in);
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return locator;
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}
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void Layer::writeValidDataOperator(DataOutputStream* out, osgTerrain::ValidDataOperator* validDataOperator)
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{
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if (validDataOperator)
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{
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out->writeBool(true);
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osgTerrain::ValidRange* validRange = dynamic_cast<osgTerrain::ValidRange*>(validDataOperator);
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if (validRange)
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{
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out->writeInt(IVEVALIDRANGE);
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out->writeFloat(validRange->getMinValue());
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out->writeFloat(validRange->getMaxValue());
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}
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else
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{
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osgTerrain::NoDataValue* noDataValue = dynamic_cast<osgTerrain::NoDataValue*>(validDataOperator);
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if (noDataValue)
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{
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out->writeInt(IVENODATAVALUE);
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out->writeFloat(noDataValue->getValue());
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}
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}
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}
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else
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{
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out->writeBool(false);
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}
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}
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osgTerrain::ValidDataOperator* Layer::readValidDataOperator(DataInputStream* in)
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{
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bool hasOperator = in->readBool();
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if (!hasOperator) return 0;
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int id = in->peekInt();
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if (id==IVEVALIDRANGE)
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{
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id = in->readInt();
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float minValue = in->readFloat();
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float maxValue = in->readFloat();
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return new osgTerrain::ValidRange(minValue,maxValue);
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}
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else if (id==IVENODATAVALUE)
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{
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id = in->readInt();
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float value = in->readFloat();
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return new osgTerrain::NoDataValue(value);
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}
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else
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{
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return 0;
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}
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}
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