114 lines
3.9 KiB
C++
114 lines
3.9 KiB
C++
/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2013 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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// -*-c++-*-
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#ifndef OSG_TEXTUREBUFFEROBJECT
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#define OSG_TEXTUREBUFFEROBJECT 1
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#include <osg/Texture>
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#include <osg/BufferObject>
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namespace osg {
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/** Encapsulates OpenGL texture buffer functionality in a Texture delegating its content to attached BufferObject
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*/
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class OSG_EXPORT TextureBuffer : public Texture
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{
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public :
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TextureBuffer();
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TextureBuffer(BufferData* image);
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/** Copy constructor using CopyOp to manage deep vs shallow copy. */
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TextureBuffer(const TextureBuffer& text,const CopyOp& copyop=CopyOp::SHALLOW_COPY);
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META_StateAttribute(osg, TextureBuffer, TEXTURE);
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/** Return -1 if *this < *rhs, 0 if *this==*rhs, 1 if *this>*rhs. */
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virtual int compare(const StateAttribute& rhs) const;
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virtual GLenum getTextureTarget() const { return GL_TEXTURE_BUFFER; }
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/** Sets the texture image. */
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void setImage(Image* image);
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/** Gets the texture image. */
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Image* getImage() { return dynamic_cast<Image*>(_bufferData.get() ); }
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/** Gets the const texture image. */
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inline const Image* getImage() const { return dynamic_cast<Image*>(_bufferData.get() ); }
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/** return true if the texture image data has been modified and the associated GL texture object needs to be updated.*/
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virtual bool isDirty(unsigned int contextID) const { return (_bufferData.valid() && _bufferData->getModifiedCount()!=_modifiedCount[contextID]); }
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inline unsigned int & getModifiedCount(unsigned int contextID) const
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{
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// get the modified count for the current contextID.
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return _modifiedCount[contextID];
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}
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/** Sets the texture image, ignoring face. */
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virtual void setImage(unsigned int, Image* image) { setImage(image); }
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/** Gets the texture image, ignoring face. */
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virtual Image* getImage(unsigned int) { return getImage(); }
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/** Gets the const texture image, ignoring face. */
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virtual const Image* getImage(unsigned int) const { return getImage(); }
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/** Gets the number of images that can be assigned to the Texture. */
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virtual unsigned int getNumImages() const { return 1; }
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/** Sets the texture width. If width is zero, calculate the value
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* from the source image width. */
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inline void setTextureWidth(int width) { _textureWidth = width; }
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/** Gets the texture width. */
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virtual int getTextureWidth() const { return _textureWidth; }
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virtual int getTextureHeight() const { return 1; }
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virtual int getTextureDepth() const { return 1; }
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virtual void allocateMipmap(State& /*state*/) const {};
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/** Bind the texture buffer.*/
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virtual void apply(State& state) const;
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/** Set setBufferData attached */
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void setBufferData(BufferData *bo);
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/** Set setBufferData attached */
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const BufferData * getBufferData()const {return _bufferData.get();}
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protected :
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virtual ~TextureBuffer();
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virtual void computeInternalFormat() const;
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ref_ptr< BufferData > _bufferData;
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GLsizei _textureWidth;
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typedef buffered_value< unsigned int > BufferDataModifiedCount;
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mutable BufferDataModifiedCount _modifiedCount;
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};
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}
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#endif
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