/* -*-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_IMAGE #define OSG_IMAGE 1 #include #include #include #include #include #include #ifndef GL_VERSION_1_2 // 1.2 definitions... #define GL_BGR 0x80E0 #define GL_BGRA 0x80E1 #define GL_UNSIGNED_BYTE_3_3_2 0x8032 #define GL_UNSIGNED_BYTE_2_3_3_REV 0x8362 #define GL_UNSIGNED_SHORT_5_6_5 0x8363 #define GL_UNSIGNED_SHORT_5_6_5_REV 0x8364 #define GL_UNSIGNED_SHORT_4_4_4_4 0x8033 #define GL_UNSIGNED_SHORT_4_4_4_4_REV 0x8365 #define GL_UNSIGNED_SHORT_5_5_5_1 0x8034 #define GL_UNSIGNED_SHORT_1_5_5_5_REV 0x8366 #define GL_UNSIGNED_INT_8_8_8_8 0x8035 #define GL_UNSIGNED_INT_8_8_8_8_REV 0x8367 #define GL_UNSIGNED_INT_10_10_10_2 0x8036 #define GL_UNSIGNED_INT_2_10_10_10_REV 0x8368 #endif #ifndef GL_COMPRESSED_ALPHA #define GL_COMPRESSED_ALPHA 0x84E9 #define GL_COMPRESSED_LUMINANCE 0x84EA #define GL_COMPRESSED_LUMINANCE_ALPHA 0x84EB #define GL_COMPRESSED_INTENSITY 0x84EC #define GL_COMPRESSED_RGB 0x84ED #define GL_COMPRESSED_RGBA 0x84EE #endif namespace osg { /** Image class for encapsulating the storage texture image data. */ class OSG_EXPORT Image : public Object { public : Image(); /** Copy constructor using CopyOp to manage deep vs shallow copy. */ Image(const Image& image,const CopyOp& copyop=CopyOp::SHALLOW_COPY); virtual Object* cloneType() const { return new Image(); } virtual Object* clone(const CopyOp& copyop) const { return new Image(*this,copyop); } virtual bool isSameKindAs(const Object* obj) const { return dynamic_cast(obj)!=0; } virtual const char* libraryName() const { return "osg"; } virtual const char* className() const { return "Image"; } /** Return -1 if *this < *rhs, 0 if *this==*rhs, 1 if *this>*rhs. */ virtual int compare(const Image& rhs) const; void setFileName(const std::string& fileName); inline const std::string& getFileName() const { return _fileName; } enum AllocationMode { NO_DELETE, USE_NEW_DELETE, USE_MALLOC_FREE }; /** Set the method used for deleting data once it goes out of scope. */ void setAllocationMode(AllocationMode mode) { _allocationMode = mode; } /** Get the method used for deleting data once it goes out of scope. */ AllocationMode getAllocationMode() const { return _allocationMode; } /** Allocate a pixel block of specified size and type. */ void allocateImage(int s,int t,int r, GLenum pixelFormat,GLenum type, int packing=1); /** Set the image dimensions, format and data. */ void setImage(int s,int t,int r, GLint internalTextureformat, GLenum pixelFormat,GLenum type, unsigned char* data, AllocationMode mode, int packing=1); /** Read pixels from current frame buffer at specified position and size, using glReadPixels. * Create memory for storage if required, reuse existing pixel coords if possible. */ void readPixels(int x,int y,int width,int height, GLenum pixelFormat,GLenum type); /** Read the contents of the current bound texture, handling compressed pixelFormats if present. * Create memory for storage if required, reuse existing pixel coords if possible. */ void readImageFromCurrentTexture(unsigned int contextID, bool copyMipMapsIfAvailable, GLenum type = GL_UNSIGNED_BYTE); /** Scale image to specified size. */ void scaleImage(int s,int t,int r) { scaleImage(s,t,r, getDataType()); } /** Scale image to specified size and with specified data type. */ void scaleImage(int s,int t,int r, GLenum newDataType); /** Copy a source Image into a subpart of this Image at specified position. * Typically used to copy to an already allocated image, such as creating * a 3D image from a stack 2D images. * If this Image is empty then image data is created to * accomodate the source image in its offset position. * If source is NULL then no operation happens, this Image is left unchanged. */ void copySubImage(int s_offset,int t_offset,int r_offset,osg::Image* source); enum Origin { BOTTOM_LEFT, TOP_LEFT }; /** Set the origin of the image. * The default value is BOTTOM_LEFT and is consistent with OpenGL. * TOP_LEFT is used for imagery that follows standard Imagery convention, such as movies, * and hasn't been flipped yet. For such images one much flip the t axis of the tex coords. * to handle this origin position. */ void setOrigin(Origin origin) { _origin = origin; } /** Get the origin of the image.*/ Origin getOrigin() const { return _origin; } /** Width of image. */ inline int s() const { return _s; } /** Height of image. */ inline int t() const { return _t; } /** Depth of image. */ inline int r() const { return _r; } void setInternalTextureFormat(GLint internalFormat); inline GLint getInternalTextureFormat() const { return _internalTextureFormat; } void setPixelFormat(GLenum pixelFormat); inline GLenum getPixelFormat() const { return _pixelFormat; } void setDataType(GLenum dataType); inline GLenum getDataType() const { return _dataType; } void setPacking(unsigned int packing) { _packing = packing; } inline unsigned int getPacking() const { return _packing; } /** Return the number of bits required for each pixel. */ inline unsigned int getPixelSizeInBits() const { return computePixelSizeInBits(_pixelFormat,_dataType); } /** Return the number of bytes each row of pixels occupies once it has been packed. */ inline unsigned int getRowSizeInBytes() const { return computeRowWidthInBytes(_s,_pixelFormat,_dataType,_packing); } /** Return the number of bytes each image (_s*_t) of pixels occupies. */ inline unsigned int getImageSizeInBytes() const { return getRowSizeInBytes()*_t; } /** Return the number of bytes the whole row/image/volume of pixels occupies. */ inline unsigned int getTotalSizeInBytes() const { return getImageSizeInBytes()*_r; } /** Return the number of bytes the whole row/image/volume of pixels occupies, including all mip maps if included. */ unsigned int getTotalSizeInBytesIncludingMipmaps() const; /** Return true if the Image represent a valid and usable imagery.*/ bool valid() const { return _s!=0 && _t!=0 && _r!=0 && _data!=0 && _dataType!=0; } /** Raw image data. */ inline unsigned char* data() { return _data; } /** Raw const image data. */ inline const unsigned char* data() const { return _data; } inline unsigned char* data(int column, int row=0,int image=0) { if (!_data) return NULL; return _data+(column*getPixelSizeInBits())/8+row*getRowSizeInBytes()+image*getImageSizeInBytes(); } inline const unsigned char* data(int column, int row=0,int image=0) const { if (!_data) return NULL; return _data+(column*getPixelSizeInBits())/8+row*getRowSizeInBytes()+image*getImageSizeInBytes(); } /** Get the color value for specified texcoord.*/ Vec4 getColor(unsigned int s,unsigned t=0,unsigned r=0) const; /** Get the color value for specified texcoord.*/ Vec4 getColor(const Vec2& texcoord) const { return getColor(Vec3(texcoord.x(),texcoord.y(),0.0f)); } /** Get the color value for specified texcoord.*/ Vec4 getColor(const Vec3& texcoord) const; /** Flip the image horizontally. */ void flipHorizontal(); /** Flip the image vertically. */ void flipVertical(); /** Ensure image dimensions are a power of two. * Mipmapped textures require the image dimensions to be * power of two and are within the maxiumum texture size for * the host machine. */ void ensureValidSizeForTexturing(GLint maxTextureSize); /** Dirty the image, which increments the modified count, to force osg::Texture to reload the image. */ inline void dirty() { ++_modifiedCount; if (_bufferObject.valid()) _bufferObject->dirty(); } /** Set the modified count value. Used by osg::Texture when using texture subloading. */ inline void setModifiedCount(unsigned int value) { _modifiedCount=value; } /** Get modified count value. Used by osg::Texture when using texture subloading. */ inline unsigned int getModifiedCount() const { return _modifiedCount; } static bool isPackedType(GLenum type); static GLenum computePixelFormat(GLenum pixelFormat); static unsigned int computeNumComponents(GLenum pixelFormat); static unsigned int computePixelSizeInBits(GLenum pixelFormat,GLenum type); static unsigned int computeRowWidthInBytes(int width,GLenum pixelFormat,GLenum type,int packing); static int computeNearestPowerOfTwo(int s,float bias=0.5f); static int computeNumberOfMipmapLevels(int s,int t = 1, int r = 1); /** Precomputed mipmaps stuff. */ typedef std::vector< unsigned int > MipmapDataType; inline bool isMipmap() const {return !_mipmapData.empty();}; unsigned int getNumMipmapLevels() const { return _mipmapData.size()+1; }; /** Send offsets into data. It is assumed that first mipmap offset (index 0) is 0.*/ inline void setMipmapLevels(const MipmapDataType& mipmapDataVector) { _mipmapData = mipmapDataVector; } inline const MipmapDataType& getMipmapLevels() const { return _mipmapData; } inline unsigned int getMipmapOffset(unsigned int mipmapLevel) const { if(mipmapLevel == 0) return 0; else if (mipmapLevel < getNumMipmapLevels()) return _mipmapData[mipmapLevel-1]; return 0; }; inline unsigned char* getMipmapData(unsigned int mipmapLevel) { return _data+getMipmapOffset(mipmapLevel); } inline const unsigned char* getMipmapData(unsigned int mipmapLevel) const { return _data+getMipmapOffset(mipmapLevel); } /** Return true if this image is translucent - i.e. it has alpha values that are less 1.0 (when normalized). */ bool isImageTranslucent() const; /** Set the optional PixelBufferObject used to map the image memory efficiently to graphics memory. */ void setPixelBufferObject(PixelBufferObject* buffer) { _bufferObject = buffer; if (_bufferObject.valid()) _bufferObject->setImage(this); } /** Get the PixelBufferObject.*/ PixelBufferObject* getPixelBufferObject() { return _bufferObject.get(); } /** Get the const PixelBufferObject.*/ const PixelBufferObject* getPixelBufferObject() const { return _bufferObject.get(); } protected : virtual ~Image(); Image& operator = (const Image&) { return *this; } std::string _fileName; Origin _origin; int _s, _t, _r; GLint _internalTextureFormat; GLenum _pixelFormat; GLenum _dataType; unsigned int _packing; AllocationMode _allocationMode; unsigned char* _data; void deallocateData(); void setData(unsigned char* data,AllocationMode allocationMode); unsigned int _modifiedCount; MipmapDataType _mipmapData; ref_ptr _bufferObject; }; class Geode; /** Convenience function to be used by image loaders to generate a valid geode * to return for readNode(). * Use the image's s and t values to scale the dimensions of the image. */ extern OSG_EXPORT Geode* createGeodeForImage(Image* image); /** Convenience function to be used by image loaders to generate a valid geode * to return for readNode(). * Use the specified s and t values to scale the dimensions of the image. */ extern OSG_EXPORT Geode* createGeodeForImage(Image* image,float s,float t); } #endif // __SG_IMAGE_H