class SG_EXPORT osg::Image

Image class for encapsulating the storage texture image data

Inheritance:

Public Methods

Image()

Image(const Image& image, const CopyOp& copyop=CopyOp::SHALLOW_COPY)

Copy constructor using CopyOp to manage deep vs shallow copy

virtual Object* cloneType() const

virtual Object* clone(const CopyOp& copyop) const

virtual bool isSameKindAs(const Object* obj) const

virtual const char* libraryName() const

virtual const char* className() const

virtual int compare(const Image& rhs) const

return -1 if *this < *rhs, 0 if *this==*rhs, 1 if *this>*rhs

void setFileName(const std::string& fileName)

inline const std::string& getFileName() const

void setAllocationMode(AllocationMode mode)

Set the method used for deleting data once it goes out of scope

AllocationMode setAllocationMode() const

Get the method used for deleting data once it goes out of scope

void allocateImage(int s, int t, int r, GLenum format, GLenum type, int packing=1)

void setImage(int s, int t, int r, GLint internalTextureformat, GLenum format, GLenum type, unsigned char* data, AllocationMode mode, int packing=1)

set the image data and format.

void readPixels(int x, int y, int width, int height, GLenum format, GLenum type)

readPixels from screen at specified position and size, using glReadPixels.

void readImageFromCurrentTexture(unsigned int contextID=0)

read the contents of the current bound texture, handling compressed formats if present.

void scaleImage(int s, int t, int r)

Scale image to specified size.

void copySubImage(int s_offset, int t_offset, int r_offset, osg::Image* source)

Copy a source Image into a subpart of this Image at specified position.

inline int s() const

Width of image

inline int t() const

Height of image

inline int r() const

Depth of image

void setInternalTextureFormat(GLint internalFormat)

inline GLint getInternalTextureFormat() const

void setPixelFormat(GLenum format)

inline GLenum getPixelFormat() const

inline GLenum getDataType() const

inline unsigned int getPacking() const

inline unsigned int getPixelSizeInBits() const

return the numbers of bits required for each pixel

inline unsigned int getRowSizeInBytes() const

return the numbers of bytes each row of pixels occupies once it has been packed

inline unsigned int getImageSizeInBytes() const

return the numbers of bytes each image (_s*_t) of pixels occupies

inline unsigned int getTotalSizeInBytes() const

return the numbers of bytes the whole row/image/volume of pixels occupies

inline unsigned char* data()

raw image data

inline const unsigned char* data() const

raw const image data

inline unsigned char* data(int column, int row=0, int image=0) const

void flipHorizontal(int image=0)

Flip the image horizontally

void flipVertical(int image=0)

Flip the image vertically

void ensureValidSizeForTexturing(GLint maxTextureSize)

Ensure image dimensions are a power of two.

inline void dirty()

Dirty the image, which increments the modified flag, to force osg::Texture to reload the image

inline void setModifiedTag(unsigned int value)

Set the modified tag value, only used by osg::Texture when using texture subloading.

inline unsigned int getModifiedTag() const

Get modified tag value, only used by osg::Texture when using texture subloading.

static bool isPackedType(GLenum type)

static unsigned int computeNumComponents(GLenum format)

static unsigned int computePixelSizeInBits(GLenum format, GLenum type)

static unsigned int computeRowWidthInBytes(int width, GLenum format, GLenum type, int packing)

static int computeNearestPowerOfTwo(int s, float bias=0.5f)

inline bool isMipmap() const

unsigned int getNumMipmapLevels() const

inline void setMipmapData(const MipmapDataType& mipmapDataVector)

inline unsigned char* getMipmapData(unsigned int mipmapNumber) const

void computeMipMaps()

converts a single image into mip mapped version image

bool isImageTranslucent() const

return true of this image is translucent - ie.

Public Members

enum AllocationMode

typedef std::vector< unsigned int > MipmapDataType

Protected Fields

std::string _fileName

int _s

int _t

int _r

GLint _internalTextureFormat

GLenum _pixelFormat

GLenum _dataType

unsigned int _packing

AllocationMode _allocationMode

unsigned char* _data

unsigned int _modifiedTag

MipmapDataType _mipmapData

Protected Methods

virtual ~Image()

Image& operator = (const Image&)

void deallocateData()

void setData(unsigned char* data, AllocationMode allocationMode)

Inherited from Object:

Public Methods

inline void setDataVariance(DataVariance dv)

inline DataVariance getDataVariance() const

inline void setUserData(Referenced* obj)

inline Referenced* getUserData()

inline const Referenced* getUserData() const

Public Members

enum DataVariance

Protected Fields

DataVariance _dataVariance

ref_ptr<Referenced> _userData

Inherited from Referenced:

Public Methods

static void setDeleteHandler(DeleteHandler* handler)

static DeleteHandler* getDeleteHandler()

inline void ref() const

inline void unref_nodelete() const

inline int referenceCount() const

inline void unref() const

Protected Fields

mutable int _refCount

Documentation

Image class for encapsulating the storage texture image data

Image()

Image(const Image& image, const CopyOp& copyop=CopyOp::SHALLOW_COPY)

Copy constructor using CopyOp to manage deep vs shallow copy

virtual Object* cloneType() const

virtual Object* clone(const CopyOp& copyop) const

virtual bool isSameKindAs(const Object* obj) const

virtual const char* libraryName() const

virtual const char* className() const

virtual int compare(const Image& rhs) const

return -1 if *this < *rhs, 0 if *this==*rhs, 1 if *this>*rhs

void setFileName(const std::string& fileName)

inline const std::string& getFileName() const

enum AllocationMode

NO_DELETE

USE_NEW_DELETE

USE_MALLOC_FREE

void setAllocationMode(AllocationMode mode)

Set the method used for deleting data once it goes out of scope

AllocationMode setAllocationMode() const

Get the method used for deleting data once it goes out of scope

void allocateImage(int s, int t, int r, GLenum format, GLenum type, int packing=1)

void setImage(int s, int t, int r, GLint internalTextureformat, GLenum format, GLenum type, unsigned char* data, AllocationMode mode, int packing=1)

set the image data and format. note, when the packing value is negative (the default is -1) this method assumes a _packing width of 1 if the width is not a multiple of 4, otherwise automatically sets to _packing to 4. If a positive value of packing is supplied than _packing is simply set to that value.

void readPixels(int x, int y, int width, int height, GLenum format, GLenum type)

readPixels from screen at specified position and size, using glReadPixels. Create memory for storage if required, reuse existing pixel coords if possible.

void readImageFromCurrentTexture(unsigned int contextID=0)

read the contents of the current bound texture, handling compressed formats if present. Create memory for storage if required, reuse existing pixel coords if possible.

void scaleImage(int s, int t, int r)

Scale image to specified size.

void copySubImage(int s_offset, int t_offset, int r_offset, osg::Image* source)

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 the this Image is empty then image data is created to accomodate the imaging image in its offset position. If source is NULL then no operation happens, this Image is left unchanged.

inline int s() const

Width of image

inline int t() const

Height of image

inline int r() const

Depth of image

void setInternalTextureFormat(GLint internalFormat)

inline GLint getInternalTextureFormat() const

void setPixelFormat(GLenum format)

inline GLenum getPixelFormat() const

inline GLenum getDataType() const

inline unsigned int getPacking() const

inline unsigned int getPixelSizeInBits() const

return the numbers of bits required for each pixel

inline unsigned int getRowSizeInBytes() const

return the numbers of bytes each row of pixels occupies once it has been packed

inline unsigned int getImageSizeInBytes() const

return the numbers of bytes each image (_s*_t) of pixels occupies

inline unsigned int getTotalSizeInBytes() const

return the numbers of bytes the whole row/image/volume of pixels occupies

inline unsigned char* data()

raw image data

inline const unsigned char* data() const

raw const image data

inline unsigned char* data(int column, int row=0, int image=0) const

void flipHorizontal(int image=0)

Flip the image horizontally

void flipVertical(int image=0)

Flip the image vertically

void ensureValidSizeForTexturing(GLint maxTextureSize)

Ensure image dimensions are a power of two. Mip Mapped texture require the image dimensions to be power of two and are within the maxiumum texture size for the host machine.

inline void dirty()

Dirty the image, which increments the modified flag, to force osg::Texture to reload the image

inline void setModifiedTag(unsigned int value)

Set the modified tag value, only used by osg::Texture when using texture subloading.

inline unsigned int getModifiedTag() const

Get modified tag value, only used by osg::Texture when using texture subloading.

static bool isPackedType(GLenum type)

static unsigned int computeNumComponents(GLenum format)

static unsigned int computePixelSizeInBits(GLenum format, GLenum type)

static unsigned int computeRowWidthInBytes(int width, GLenum format, GLenum type, int packing)

static int computeNearestPowerOfTwo(int s, float bias=0.5f)

typedef std::vector< unsigned int > MipmapDataType

inline bool isMipmap() const

unsigned int getNumMipmapLevels() const

inline void setMipmapData(const MipmapDataType& mipmapDataVector)

inline unsigned char* getMipmapData(unsigned int mipmapNumber) const

void computeMipMaps()

converts a single image into mip mapped version image

bool isImageTranslucent() const

return true of this image is translucent - ie. it has alpha values that are less 1.0 (when normalized).

virtual ~Image()

Image& operator = (const Image&)

std::string _fileName

int _s

int _t

int _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 _modifiedTag

MipmapDataType _mipmapData

This class has no child classes.

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