6a67be2e32
forcing users to use osgDB::readRef*File() methods. The later is preferable as it closes a potential threading bug when using paging databases in conjunction
with the osgDB::Registry Object Cache. This threading bug occurs when one thread gets an object from the Cache via an osgDB::read*File() call where only
a pointer to the object is passed back, so taking a reference to the object is delayed till it gets reassigned to a ref_ptr<>, but at the same time another
thread calls a flush of the Object Cache deleting this object as it's referenceCount is now zero. Using osgDB::readREf*File() makes sure the a ref_ptr<> is
passed back and the referenceCount never goes to zero.
To ensure the OSG builds when OSG_PROVIDE_READFILE is to OFF the many cases of osgDB::read*File() usage had to be replaced with a ref_ptr<> osgDB::readRef*File()
usage. The avoid this change causing lots of other client code to be rewritten to handle the use of ref_ptr<> in place of C pointer I introduced a serious of
templte methods in various class to adapt ref_ptr<> to the underly C pointer to be passed to old OSG API's, example of this is found in include/osg/Group:
bool addChild(Node* child); // old method which can only be used with a Node*
tempalte<class T> bool addChild(const osg::ref_ptr<T>& child) { return addChild(child.get()); } // adapter template method
These changes together cover 149 modified files, so it's a large submission. This extent of changes are warrent to make use of the Object Cache
and multi-threaded loaded more robust.
git-svn-id: http://svn.openscenegraph.org/osg/OpenSceneGraph/branches/OpenSceneGraph-3.4@15165 16af8721-9629-0410-8352-f15c8da7e697
290 lines
11 KiB
C++
290 lines
11 KiB
C++
/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2009 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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#ifndef OSGVOLUME_LAYER
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#define OSGVOLUME_LAYER 1
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#include <osg/Image>
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#include <osg/TransferFunction>
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#include <osgVolume/Locator>
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#include <osgVolume/Property>
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namespace osgVolume {
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/** Data strucutre for passing details about the loading imagery on to osgVolume for use when setting up dimensions etc.*/
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class OSGVOLUME_EXPORT ImageDetails : public osg::Object
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{
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public:
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ImageDetails();
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/** Copy constructor using CopyOp to manage deep vs shallow copy.*/
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ImageDetails(const ImageDetails&,const osg::CopyOp& copyop=osg::CopyOp::SHALLOW_COPY);
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META_Object(osgVolume, ImageDetails);
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void setTexelOffset(const osg::Vec4& offset) { _texelOffset = offset; }
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const osg::Vec4& getTexelOffset() const { return _texelOffset; }
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void setTexelScale(const osg::Vec4& scale) { _texelScale = scale; }
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const osg::Vec4& getTexelScale() const { return _texelScale; }
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void setMatrix(osg::RefMatrix* matrix) { _matrix = matrix; }
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osg::RefMatrix* getMatrix() { return _matrix.get(); }
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const osg::RefMatrix* getMatrix() const { return _matrix.get(); }
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protected:
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osg::Vec4 _texelOffset;
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osg::Vec4 _texelScale;
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osg::ref_ptr<osg::RefMatrix> _matrix;
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};
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/** Base class for representing a single layer of volume data.*/
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class OSGVOLUME_EXPORT Layer : public osg::Object
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{
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public:
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Layer();
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/** Copy constructor using CopyOp to manage deep vs shallow copy.*/
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Layer(const Layer&,const osg::CopyOp& copyop=osg::CopyOp::SHALLOW_COPY);
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META_Object(osgVolume, Layer);
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/** Set the file name of the data associated with this layer. */
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virtual void setFileName(const std::string& filename) { _filename = filename; }
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/** Get the file name of the layer. */
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virtual const std::string& getFileName() const { return _filename; }
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void setLocator(Locator* locator) { _locator = locator; }
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template<class T> void setLocator(const osg::ref_ptr<T>& locator) { setLocator(locator.get()); }
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Locator* getLocator() { return _locator.get(); }
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const Locator* getLocator() const { return _locator.get(); }
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void setDefaultValue(const osg::Vec4& value) { _defaultValue = value; }
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const osg::Vec4& getDefaultValue() const { return _defaultValue; }
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/** Set the minification texture filter to use when do texture associated with this layer.*/
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void setMinFilter(osg::Texture::FilterMode filter) { _minFilter = filter; }
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/** Get the minification texture filter to use when do texture associated with this layer.*/
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osg::Texture::FilterMode getMinFilter() const { return _minFilter; }
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/** Set the magniification texture filter to use when do texture associated with this layer.*/
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void setMagFilter(osg::Texture::FilterMode filter) { _magFilter = filter; }
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/** Get the magnification texture filter to use when do texture associated with this layer.*/
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osg::Texture::FilterMode getMagFilter() const { return _magFilter; }
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/** Return image associated with layer if supported. */
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virtual osg::Image* getImage() { return 0; }
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/** Return const image associated with layer if supported. */
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virtual const osg::Image* getImage() const { return 0; }
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/** Set the Property (or Properties via the CompositeProperty) that informs the VolumeTechnique how this layer should be rendered.*/
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void setProperty(Property* property) { _property = property; }
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template<class T> void setProperty(const osg::ref_ptr<T>& p) { setProperty(p.get()); }
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/** Get the Property that informs the VolumeTechnique how this layer should be rendered.*/
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Property* getProperty() { return _property.get(); }
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/** Get the const Property that informs the VolumeTechnique how this layer should be rendered.*/
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const Property* getProperty() const { return _property.get(); }
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/** Add a property, automatically creating a CompositePorperty if one isn't already assigned.*/
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void addProperty(Property* property);
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template<class T> void addProperty(const osg::ref_ptr<T>& p) { addProperty(p.get()); }
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/** Specify whether ImageLayer requires update traversal. */
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virtual bool requiresUpdateTraversal() const { return false; }
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/** Call update on the Layer.*/
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virtual void update(osg::NodeVisitor& /*nv*/) {}
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/** increment the modified count."*/
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virtual void dirty() {};
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/** Set the modified count value. */
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virtual void setModifiedCount(unsigned int /*value*/) {};
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/** Get modified count value. */
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virtual unsigned int getModifiedCount() const { return 0; }
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virtual osg::BoundingSphere computeBound() const;
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protected:
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virtual ~Layer();
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std::string _filename;
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osg::ref_ptr<Locator> _locator;
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osg::Vec4 _defaultValue;
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osg::Texture::FilterMode _minFilter;
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osg::Texture::FilterMode _magFilter;
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osg::ref_ptr<Property> _property;
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};
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class OSGVOLUME_EXPORT ImageLayer : public Layer
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{
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public:
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ImageLayer(osg::Image* image=0);
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/** Copy constructor using CopyOp to manage deep vs shallow copy.*/
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ImageLayer(const ImageLayer& imageLayer,const osg::CopyOp& copyop=osg::CopyOp::SHALLOW_COPY);
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META_Object(osgVolume, ImageLayer);
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void setFileName(const std::string& filename) { _filename = filename; if (_image.valid()) _image->setFileName(filename); }
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virtual const std::string& getFileName() const { return _image.get() ? _image->getFileName() : _filename; }
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void setImage(osg::Image* image);
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template<class T> void setImage(const osg::ref_ptr<T>& image) { setImage(image.get()); }
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/** Return image associated with layer. */
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virtual osg::Image* getImage() { return _image.get(); }
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/** Return const image associated with layer. */
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virtual const osg::Image* getImage() const { return _image.get(); }
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void setTexelOffset(const osg::Vec4& offset) { _texelOffset = offset; }
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const osg::Vec4& getTexelOffset() const { return _texelOffset; }
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void setTexelScale(const osg::Vec4& scale) { _texelScale = scale; }
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const osg::Vec4& getTexelScale() const { return _texelScale; }
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/** Compute the min and max pixel colors.*/
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bool computeMinMax(osg::Vec4& min, osg::Vec4& max);
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/** Apply color transformation to pixels using c' = offset + c * scale .*/
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void offsetAndScaleImage(const osg::Vec4& offset, const osg::Vec4& scale);
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/** Compute the min max range of the image, and then remap this to a 0 to 1 range.*/
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void rescaleToZeroToOneRange();
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/** Compute the min color component of the image and then translate and pixels by this offset to make the new min component 0.*/
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void translateMinToZero();
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virtual bool requiresUpdateTraversal() const;
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virtual void update(osg::NodeVisitor& /*nv*/);
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virtual void dirty();
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virtual void setModifiedCount(unsigned int value);
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virtual unsigned int getModifiedCount() const;
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protected:
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virtual ~ImageLayer() {}
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osg::Vec4 _texelOffset;
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osg::Vec4 _texelScale;
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osg::ref_ptr<osg::Image> _image;
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};
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class OSGVOLUME_EXPORT CompositeLayer : public Layer
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{
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public:
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CompositeLayer();
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/** Copy constructor using CopyOp to manage deep vs shallow copy.*/
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CompositeLayer(const CompositeLayer& compositeLayer,const osg::CopyOp& copyop=osg::CopyOp::SHALLOW_COPY);
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META_Object(osgVolume, CompositeLayer);
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void clear();
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void setFileName(unsigned int i, const std::string& filename) { if (i>=_layers.size()) _layers.resize(i+1); _layers[i].filename = filename; if (_layers[i].layer.valid()) _layers[i].layer->setFileName(filename); }
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const std::string& getFileName(unsigned int i) const { return _layers[i].layer.valid() ? _layers[i].layer->getFileName() : _layers[i].filename; }
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void setLayer(unsigned int i, Layer* layer) { if (i>=_layers.size()) _layers.resize(i+1); _layers[i].layer = layer; }
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template<class T> void setLayer(unsigned int i, const osg::ref_ptr<T>& layer) { setLayer(i, layer.get()); }
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Layer* getLayer(unsigned int i) { return i<_layers.size() ? _layers[i].layer.get() : 0; }
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const Layer* getLayer(unsigned int i) const { return i<_layers.size() ? _layers[i].layer.get() : 0; }
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void addLayer(Layer* layer) { _layers.push_back(NameLayer(layer->getFileName(),layer)); }
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template<class T> void addLayer(const osg::ref_ptr<T>& layer) { addLayer(layer.get()); }
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void removeLayer(unsigned int i) { _layers.erase(_layers.begin()+i); }
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unsigned int getNumLayers() const { return _layers.size(); }
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bool requiresUpdateTraversal() const;
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virtual void update(osg::NodeVisitor& /*nv*/);
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protected:
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virtual ~CompositeLayer() {}
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struct NameLayer
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{
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NameLayer() {}
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NameLayer(const NameLayer& cnl):
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filename(cnl.filename),
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layer(cnl.layer) {}
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NameLayer(const std::string& fn, Layer* l):
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filename(fn),
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layer(l) {}
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NameLayer& operator = (const NameLayer& cnl)
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{
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if (&cnl==this) return *this;
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filename = cnl.filename;
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layer = cnl.layer;
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return *this;
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}
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std::string filename;
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osg::ref_ptr<Layer> layer;
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};
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typedef std::vector< NameLayer > Layers;
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Layers _layers;
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};
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/** Compute a 3d image that represent the normal map of the specified 3d image.*/
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extern OSGVOLUME_EXPORT osg::Image* createNormalMapTexture(osg::Image* image_3d);
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/** Create an image that has a transfer function applied specified Image.*/
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extern OSGVOLUME_EXPORT osg::Image* applyTransferFunction(osg::Image* image, osg::TransferFunction1D* transferFunction);
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}
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#endif
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