158 lines
5.4 KiB
Plaintext
158 lines
5.4 KiB
Plaintext
//C++ header - Open Scene Graph - Copyright (C) 1998-2002 Robert Osfield
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//Distributed under the terms of the GNU Library General Public License (LGPL)
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//as published by the Free Software Foundation.
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#ifndef OSG_TEXTURECUBEMAP
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#define OSG_TEXTURECUBEMAP 1
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#include <osg/Texture>
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#ifndef GL_TEXTURE_CUBE_MAP
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#define GL_TEXTURE_CUBE_MAP 0x8513
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#endif
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namespace osg {
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/** TextureCubeMap state class which encapsulates OpenGl texture cubemap functionality.*/
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class SG_EXPORT TextureCubeMap : public Texture
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{
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public :
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TextureCubeMap();
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/** Copy constructor using CopyOp to manage deep vs shallow copy.*/
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TextureCubeMap(const TextureCubeMap& cm,const CopyOp& copyop=CopyOp::SHALLOW_COPY);
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META_StateAttribute(osg, TextureCubeMap,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 void getAssociatedModes(std::vector<GLMode>& modes) const
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{
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modes.push_back(GL_TEXTURE_CUBE_MAP);
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}
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enum Face {
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POSITIVE_X=0,
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NEGATIVE_X=1,
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POSITIVE_Y=2,
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NEGATIVE_Y=3,
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POSITIVE_Z=4,
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NEGATIVE_Z=5
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};
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/** Set the texture image for specified face. */
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void setImage(Face, Image* image);
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/** Get the texture image for specified face. */
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Image* getImage(Face);
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/** Get the const texture image for specified face. */
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const Image* getImage(Face) const;
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/** Set the texture width and height. If width or height are zero then
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* the repsective size value is calculated from the source image sizes. */
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inline void setTextureSize(int width, int height) const
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{
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_textureWidth = width;
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_textureHeight = height;
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}
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/** Get the texture subload width. */
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inline void getTextureSize(int& width, int& height) const
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{
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width = _textureWidth;
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height = _textureHeight;
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}
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class SubloadCallback : public Referenced
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{
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public:
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virtual void load(const TextureCubeMap& texture,State& state) const = 0;
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virtual void subload(const TextureCubeMap& texture,State& state) const = 0;
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};
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void setSubloadCallback(SubloadCallback* cb) { _subloadCallback = cb;; }
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SubloadCallback* getSubloadCallback() { return _subloadCallback.get(); }
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const SubloadCallback* getSubloadCallback() const { return _subloadCallback.get(); }
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/** Set the number of mip map levels the the texture has been created with,
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should only be called within an osg::Texuture::apply() and custom OpenGL texture load.*/
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void setNumMipmapLevels(unsigned int num) const { _numMimpmapLevels=num; }
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/** Get the number of mip map levels the the texture has been created with.*/
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unsigned int getNumMipmapLevels() const { return _numMimpmapLevels; }
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/** On first apply (unless already compiled), create the minmapped
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* texture and bind it, subsequent apply will simple bind to texture.*/
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virtual void apply(State& state) const;
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/** Extensions class which encapsulates the querring of extensions and
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* associated function pointers, and provide convinience wrappers to
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* check for the extensions or use the associated functions.*/
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class Extensions : public osg::Referenced
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{
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public:
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Extensions();
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Extensions(const Extensions& rhs);
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void lowestCommonDenominator(const Extensions& rhs);
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void setupGLExtenions();
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bool isCubeMapSupported() const { return _isCubeMapSupported; }
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protected:
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~Extensions() {}
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bool _isCubeMapSupported;
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};
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/** Function to call to get the extension of a specified context.
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* If the Exentsion object for that context has not yet been created then
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* and the 'createIfNotInitalized' flag been set to false then returns NULL.
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* If 'createIfNotInitalized' is true then the Extensions object is
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* automatically created. However, in this case the extension object
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* only be created with the graphics context associated with ContextID..*/
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static const Extensions* getExtensions(uint contextID,bool createIfNotInitalized);
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/** setExtensions allows users to override the extensions across graphics contexts.
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* typically used when you have different extensions supported across graphics pipes
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* but need to ensure that they all use the same low common denominator extensions.*/
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static void setExtensions(uint contextID,Extensions* extensions);
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protected :
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virtual ~TextureCubeMap();
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bool imagesValid() const;
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virtual void computeInternalFormat() const;
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mutable ref_ptr<Image> _images[6];
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// subloaded images can have different texture and image sizes.
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mutable GLsizei _textureWidth, _textureHeight;
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// number of mip map levels the the texture has been created with,
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mutable GLsizei _numMimpmapLevels;
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ref_ptr<SubloadCallback> _subloadCallback;
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};
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}
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#endif
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