/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield * * This library is open source and may be redistributed and/or modified under * the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or * (at your option) any later version. The full license is in LICENSE file * included with this distribution, and on the openscenegraph.org website. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * OpenSceneGraph Public License for more details. */ #ifndef OSG_TEXTURE3D #define OSG_TEXTURE3D 1 #include #ifndef GL_MAX_3D_TEXTURE_SIZE #define GL_MAX_3D_TEXTURE_SIZE 0x8073 #endif namespace osg { /** Encapsulates OpenGl 2D texture functionality. Doesn't support cube maps, * so ignore \a face parameters. */ class OSG_EXPORT Texture3D : public Texture { public : Texture3D(); Texture3D(Image* image); /** Copy constructor using CopyOp to manage deep vs shallow copy. */ Texture3D(const Texture3D& text,const CopyOp& copyop=CopyOp::SHALLOW_COPY); META_StateAttribute(osg, Texture3D,TEXTURE); /** Return -1 if *this < *rhs, 0 if *this==*rhs, 1 if *this>*rhs. */ virtual int compare(const StateAttribute& rhs) const; virtual GLenum getTextureTarget() const { return GL_TEXTURE_3D; } /** Sets the texture image. */ void setImage(Image* image); /** Gets the texture image. */ Image* getImage() { return _image.get(); } /** Gets the const texture image. */ inline const Image* getImage() const { return _image.get(); } inline unsigned int& getModifiedCount(unsigned int contextID) const { // get the modified count for the current contextID. return _modifiedCount[contextID]; } /** Sets the texture image, ignoring face. */ virtual void setImage(unsigned int, Image* image) { setImage(image); } /** Gets the texture image, ignoring face. */ virtual Image* getImage(unsigned int) { return _image.get(); } /** Gets the const texture image, ignoring face. */ virtual const Image* getImage(unsigned int) const { return _image.get(); } /** Gets the number of images that can be assigned to the Texture. */ virtual unsigned int getNumImages() const { return 1; } /** Sets the texture width, height, and depth. If width, height, or * depth are zero, calculate the respective value from the source * image size. */ inline void setTextureSize(int width, int height, int depth) const { _textureWidth = width; _textureHeight = height; _textureDepth = depth; } /** Gets the texture subload width. */ inline void getTextureSize(int& width, int& height, int& depth) const { width = _textureWidth; height = _textureHeight; depth = _textureDepth; } void setTextureWidth(int width) { _textureWidth=width; } void setTextureHeight(int height) { _textureHeight=height; } void setTextureDepth(int depth) { _textureDepth=depth; } virtual int getTextureWidth() const { return _textureWidth; } virtual int getTextureHeight() const { return _textureHeight; } virtual int getTextureDepth() const { return _textureDepth; } class OSG_EXPORT SubloadCallback : public Referenced { public: virtual void load(const Texture3D& texture,State& state) const = 0; virtual void subload(const Texture3D& texture,State& state) const = 0; }; void setSubloadCallback(SubloadCallback* cb) { _subloadCallback = cb;; } SubloadCallback* getSubloadCallback() { return _subloadCallback.get(); } const SubloadCallback* getSubloadCallback() const { return _subloadCallback.get(); } /** Helper function. Sets the number of mipmap levels created for this * texture. Should only be called within an osg::Texture::apply(), or * during a custom OpenGL texture load. */ void setNumMipmapLevels(unsigned int num) const { _numMipmapLevels=num; } /** Gets the number of mipmap levels created. */ unsigned int getNumMipmapLevels() const { return _numMipmapLevels; } /** Copies a two-dimensional texture subimage, as per * glCopyTexSubImage3D. Updates a portion of an existing OpenGL * texture object from the current OpenGL background framebuffer * contents at position \a x, \a y with width \a width and height * \a height. Loads framebuffer data into the texture using offsets * \a xoffset, \a yoffset, and \a zoffset. \a width and \a height * must be powers of two. */ void copyTexSubImage3D(State& state, int xoffset, int yoffset, int zoffset, int x, int y, int width, int height); /** Bind the texture object. If the texture object hasn't already been * compiled, create the texture mipmap levels. */ virtual void apply(State& state) const; /** Encapsulates queries of extension availability, obtains extension * function pointers, and provides convenience wrappers for * calling extension functions. */ class OSG_EXPORT Extensions : public osg::Referenced { public: Extensions(unsigned int contextID); Extensions(const Extensions& rhs); void lowestCommonDenominator(const Extensions& rhs); void setupGLExtensions(unsigned int contextID); void setTexture3DSupported(bool flag) { _isTexture3DSupported=flag; } bool isTexture3DSupported() const { return _isTexture3DSupported; } void setTexture3DFast(bool flag) { _isTexture3DFast=flag; } bool isTexture3DFast() const { return _isTexture3DFast; } void setMaxTexture3DSize(GLint maxsize) { _maxTexture3DSize=maxsize; } GLint maxTexture3DSize() const { return _maxTexture3DSize; } void glTexImage3D( GLenum target, GLint level, GLenum internalFormat, GLsizei width, GLsizei height, GLsizei depth, GLint border, GLenum format, GLenum type, const GLvoid *pixels) const; void glTexSubImage3D( GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLsizei width, GLsizei height, GLsizei depth, GLenum format, GLenum type, const GLvoid *pixels) const; void glCopyTexSubImage3D( GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLint x, GLint y, GLsizei width, GLsizei height ) const; bool isCompressedTexImage3DSupported() const { return _glCompressedTexImage3D!=0; } void glCompressedTexImage3D(GLenum target, GLint level, GLenum internalformat, GLsizei width, GLsizei height, GLsizei depth, GLint border, GLsizei imageSize, const GLvoid *data) const; bool isCompressedTexSubImage3DSupported() const { return _glCompressedTexSubImage3D!=0; } void glCompressedTexSubImage3D( GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLsizei width, GLsizei height, GLsizei depth, GLenum format, GLsizei imageSize, const GLvoid *data ) const; void gluBuild3DMipmaps( GLenum target, GLint internalFormat, GLsizei width, GLsizei height, GLsizei depth, GLenum format, GLenum type, const GLvoid *data) const; protected: ~Extensions() {} bool _isTexture3DSupported; bool _isTexture3DFast; GLint _maxTexture3DSize; typedef void (GL_APIENTRY * GLTexImage3DProc) ( GLenum target, GLint level, GLenum internalFormat, GLsizei width, GLsizei height, GLsizei depth, GLint border, GLenum format, GLenum type, const GLvoid *pixels); typedef void (GL_APIENTRY * GLTexSubImage3DProc) ( GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLsizei width, GLsizei height, GLsizei depth, GLenum format, GLenum type, const GLvoid *pixels); typedef void (GL_APIENTRY * CompressedTexImage3DArbProc) (GLenum target, GLint level, GLenum internalformat, GLsizei width, GLsizei height, GLsizei depth, GLint border, GLsizei imageSize, const GLvoid *data); typedef void (GL_APIENTRY * CompressedTexSubImage3DArbProc) (GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLsizei width, GLsizei height, GLsizei depth, GLenum format, GLsizei imageSize, const GLvoid *data); typedef void (GL_APIENTRY * GLCopyTexSubImageProc) ( GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLint x, GLint y, GLsizei width, GLsizei height ); typedef void (GL_APIENTRY * GLUBuild3DMipMapsProc) ( GLenum target, GLint internalFormat, GLsizei width, GLsizei height, GLsizei depth, GLenum format, GLenum type, const GLvoid *data); GLTexImage3DProc _glTexImage3D; GLTexSubImage3DProc _glTexSubImage3D; CompressedTexImage3DArbProc _glCompressedTexImage3D; CompressedTexSubImage3DArbProc _glCompressedTexSubImage3D; GLCopyTexSubImageProc _glCopyTexSubImage3D; GLUBuild3DMipMapsProc _gluBuild3DMipmaps; }; /** Encapsulates queries of extension availability, obtains extension * function pointers, and provides convenience wrappers for * calling extension functions. */ static Extensions* getExtensions(unsigned int contextID,bool createIfNotInitalized); /** Overrides Extensions objects across graphics contexts. Typically * used to ensure the same lowest common denominator of extensions * on systems with different graphics pipes. */ static void setExtensions(unsigned int contextID,Extensions* extensions); protected : virtual ~Texture3D(); void computeRequiredTextureDimensions(State& state, const osg::Image& image,GLsizei& width, GLsizei& height,GLsizei& depth, GLsizei& numMipmapLevels) const; virtual void computeInternalFormat() const; void allocateMipmap(State& state) const; void applyTexImage3D(GLenum target, Image* image, State& state, GLsizei& inwidth, GLsizei& inheight, GLsizei& indepth, GLsizei& numMipmapLevels) const; /** It's not ideal that _image is mutable, but it's required since * Image::ensureDimensionsArePowerOfTwo() can only be called in a * valid OpenGL context, and therefore within Texture::apply, which * is const. */ mutable ref_ptr _image; /** Subloaded images can have different texture and image sizes. */ mutable GLsizei _textureWidth, _textureHeight, _textureDepth; /** Number of mip map levels the the texture has been created with, */ mutable GLsizei _numMipmapLevels; ref_ptr _subloadCallback; typedef buffered_value ImageModifiedCount; mutable ImageModifiedCount _modifiedCount; }; } #endif