Field containing a 2D image. More...

#include <Inventor/fields/SoSFImage.h>

Inheritance diagram for SoSFImage:

Public Types
enum	DataType { UNSIGNED_BYTE = SbDataType::UNSIGNED_BYTE , UNSIGNED_SHORT = SbDataType::UNSIGNED_SHORT , UNSIGNED_INT32 = SbDataType::UNSIGNED_INT32 , SIGNED_BYTE = SbDataType::SIGNED_BYTE , SIGNED_SHORT = SbDataType::SIGNED_SHORT , SIGNED_INT32 = SbDataType::SIGNED_INT32 , FLOAT = SbDataType::FLOAT }
	Encoding data type. More...

enum	CopyPolicy { COPY = 0 , NO_COPY = 1 , NO_COPY_AND_DELETE = 2 , NO_COPY_AND_FREE = 3 }
	SoSFImage may be manipulating some large amounts of memory. More...

Public Member Functions
virtual SoType	getTypeId () const
	Returns the type identifier for this specific instance.

const SoSFImage &	operator= (const SoSFImage &f)
	Copy from another field of same type.

	SoSFImage ()
	Default constructor.

virtual	~SoSFImage ()
	Destructor.

	SoSFImage (const SoSFImage &obj)
	Copy constructor.

const void *	getValue (SbVec2s &size, int &nc, DataType &dataType) const
	Returns the pixels in the image as an array of values of type <dataType>.

const void *	getValue (SbVec2i32 &size, int &nc, DataType &dataType) const

const unsigned char *	getValue (SbVec2s &size, int &nc) const
	Same as above.

const unsigned char *	getValue (SbVec2i32 &size, int &nc) const

void	setValue (const SbVec2s &size, int nc, DataType dataType, const void *data, CopyPolicy copy=COPY)
	Sets the value of this field to be an image of the given size, with the given number of components, and with the given pixel values.

void	setValue (const SbVec2s &size, int nc, DataType dataType, SoBufferObject *bufferObject, CopyPolicy copy=COPY)

void	setValue (const SbVec2i32 &size, int nc, DataType dataType, const void *data, CopyPolicy copy=COPY)

void	setValue (const SbVec2i32 &size, int nc, DataType dataType, SoBufferObject *bufferObject, CopyPolicy copy=COPY)

void	setValue (const SbVec2s &size, int nc, const unsigned char *bytes, CopyPolicy copy=COPY)
	Same as above.

void	setValue (const SbVec2i32 &size, int nc, const unsigned char *bytes, CopyPolicy copy=COPY)

void	setSubValue (const SbVec2s &subSize, const SbVec2s &offset, void *data)
	This method can be used for subtexturing.

void	setSubValue (const SbVec2i32 &subSize, const SbVec2i32 &offset, void *data)

void	setSubValue (const SbVec2s &subSize, const SbVec2s &offset, unsigned char *bytes)
	Same as above.

void	setSubValue (const SbVec2i32 &subSize, const SbVec2i32 &offset, unsigned char *bytes)

void	setSubValues (const SbVec2s subSizes, const SbVec2s offsets, int num, void **data)
	This method can be used for subtexturing.

void	setSubValues (const SbVec2i32 subSizes, const SbVec2i32 offsets, int num, void **data)

void	setSubValues (const SbVec2s subSizes, const SbVec2s offsets, int num, unsigned char **subBytes)
	Same as above.

void	setSubValues (const SbVec2i32 subSizes, const SbVec2i32 offsets, int num, unsigned char **subBytes)

int	operator== (const SoSFImage &f) const
	Equality test.

int	operator!= (const SoSFImage &f) const
	Inequality test.

void *	startEditing (SbVec2s &size, int &nc, DataType &dataType)
	This method (along with finishEditing()) can be used to efficiently edit the values in an image field.

void *	startEditing (SbVec2i32 &size, int &nc, DataType &dataType)

unsigned char *	startEditing (SbVec2s &size, int &nc)
	Same as above.

unsigned char *	startEditing (SbVec2i32 &size, int &nc)

void	finishEditing ()
	This method (along with startEditing())can be used to efficiently edit the values in an image field.

void *	getSubTexture (int index, SbVec2s &size, SbVec2s &offset, DataType &dataType)
	Returns a buffer of a given subTexture set by setSubValue(), setSubValues() or a startEditing()/finishEditing() pair.

void *	getSubTexture (int index, SbVec2i32 &size, SbVec2i32 &offset, DataType &dataType)

unsigned char *	getSubTexture (int index, SbVec2s &size, SbVec2s &offset)
	Same as above.

unsigned char *	getSubTexture (int index, SbVec2i32 &size, SbVec2i32 &offset)

SbBool	hasSubTextures (int &numSubTextures)
	Returns TRUE if subTextures have been defined or FALSE if none have been defined.

void	setNeverWrite (SbBool neverWrite)
	Sets the "neverWrite" flag.

SbBool	isNeverWrite ()
	Queries the "neverWrite" flag.

SbBool	hasTransparency () const
	Returns TRUE if the image contains any transparent pixels.

SbRasterImage *	toRasterImage (bool downSample=true) const
	Returns an instance of SbRasterImage filled with the content of this field.

int	getNumComponents () const
	Returns image's number of components.

Public Member Functions inherited from SoField
void	setIgnored (SbBool ig)
	Sets the ignore flag for this field.

SbBool	isIgnored () const
	Gets the ignore flag for this field.

SbBool	isDefault () const
	Gets the state of default flag of the field.

void	enableConnection (SbBool flag)
	Field connections may be enabled and disabled.

SbBool	isConnectionEnabled () const
	Returns FALSE if connections to this field are disabled.

SbBool	connectFrom (SoEngineOutput *engineOutput)
	Connects this field from an engine output.

SbBool	connectFrom (SoField *field)
	Connects this field to another field.

SbBool	connectFrom (SoVRMLInterpOutput *interpOutput)
	Connects this field from an interpOutput.

SbBool	appendConnection (SoEngineOutput *engineOutput)
	Appends this field to the list of connections from another engineOutput.

SbBool	appendConnection (SoField *field)
	Appends this field to the list of connections from another field.

SbBool	appendConnection (SoVRMLInterpOutput *interpOutput)
	Appends this field to the list of connections from another interpOutput.

void	disconnect (SoEngineOutput *engineOutput)
	Disconnect the field from the requested engineOutput.

void	disconnect (SoField *field)
	Disconnect the field from the requested field.

void	disconnect (SoVRMLInterpOutput *interpOutput)
	Disconnect the field from the requested interpOutput.

int	getNumConnections () const
	Returns the number of connections to this field.

int	getConnections (SoFieldList &list)
	Returns a list of the connections to this field.

void	disconnect ()
	Disconnect the field from whatever it was connected to.

SbBool	isConnected () const
	Returns TRUE if the field is connected to anything.

SbBool	isConnectedFromVRMLInterp () const
	Returns TRUE if the field is connected to a VRML interpOutput.

SbBool	isConnectedFromEngine () const
	Returns TRUE if the field is connected to an engine's output.

SbBool	isConnectedFromField () const
	Returns TRUE if the field is connected to another field.

SbBool	getConnectedEngine (SoEngineOutput *&engineOutput) const
	Returns TRUE if this field is being written into by an engine, and returns the engine output it is connected to in engineOutput.

SbBool	getConnectedField (SoField *&writingField) const
	Returns TRUE if this field is being written into by another field, and returns the field it is connected to in writingField.

SbBool	getConnectedVRMLInterp (SoVRMLInterpOutput *&interpOutput) const
	Returns the VRMLInterpolator output field is connected to.

int	getForwardConnections (SoFieldList &list) const
	Adds references to all of the fields that this field is writing into (either fields in nodes, global fields or engine inputs) to the given field list, and returns the number of forward connections.

SoFieldContainer *	getContainer () const
	Returns the object that contains this field.

SoNONUNICODE SbBool	set (const char *valueString)
	Sets the field to the given value, which is an ASCII string in the Open Inventor file format.

SbBool	set (const SbString &valueString)
	Sets the field to the given value, which is an ASCII string in the Open Inventor file format.

void	get (SbString &valueString)
	Returns the value of the field in the Open Inventor file format, even if the field has its default value.

virtual size_t	getValueSize () const
	Gets the size of the value.

virtual void	touch ()
	Simulates a change to the field, causing attached sensors to fire, connected fields and engines to be marked as needing evaluation, and so forth.

int	operator== (const SoField &f) const
	Return TRUE if this field is of the same type and has the same value as f.

int	operator!= (const SoField &f) const
	Return FALSE if this field is of the same type and has the same value as f.

Public Member Functions inherited from SoTypedObject
SbBool	isOfType (const SoType &type) const
	Returns TRUE if this object is of the type specified in type or is derived from that type.

template<typename TypedObjectClass >
SbBool	isOfType () const
	Returns TRUE if this object is of the type of class TypedObjectClass or is derived from that class.

Static Public Member Functions
static SoType	getClassTypeId ()
	Returns the type identifier for this class.

Static Public Member Functions inherited from SoSField
static SoType	getClassTypeId ()
	Return the type identifier for this field class.

Static Public Member Functions inherited from SoField
static SoType	getClassTypeId ()
	Return the type identifier for this field class.

Static Public Member Functions inherited from SoTypedObject
static SoType	getClassTypeId ()
	Returns the type identifier for this class.

Detailed Description

Field containing a 2D image.

A field containing a two-dimensional image. Images can be grayscale (intensity), grayscale with transparency information, RGB, or RGB with transparency. Each component of the image (intensity, red, green, blue or transparency (alpha)) can have an unsigned one-byte value from 0 to 255.

Values are returned as arrays of unsigned chars. The image is stored in this array starting at the bottom left corner of the image with the intensity or red component of that pixel, followed by either the alpha, the green and blue, or the green, blue and alpha components (depending on the number of components in the image). The next value is the first component of the next pixel to the right.

SoSFImages are written to file as three integers representing the width, height and number of components in the image, followed by width*height hexadecimal values representing the pixels in the image, separated by whitespace. A one-component image will have one-byte hexadecimal values representing the intensity of the image. For example, 0xFF is full intensity, 0x00 is no intensity. A two-component image puts the intensity in the first (high) byte and the transparency in the second (low) byte. Pixels in a three-component image have the red component in the first (high) byte, followed by the green and blue components (so 0xFF0000 is red). Four-component images put the transparency byte after red/green/blue (so 0x0000FF80 is semi-transparent blue). Note: each pixel is actually read as a single unsigned number, so a 3-component pixel with value "0x0000FF" can also be written as "0xFF" or "255" (decimal).

For example,

   1 2 1 0xFF 0x00

is a 1 pixel wide by 2 pixel high grayscale image, with the bottom pixel white and the top pixel black. And:

   2 4 3 0xFF0000 0xFF00 0 0 0 0 0xFFFFFF 0xFFFF00

is a 2 pixel wide by 4 pixel high RGB image, with the bottom left pixel red, the bottom right pixel green, the two middle rows of pixels black, the top left pixel white, and the top right pixel yellow.

Member Enumeration Documentation

◆ CopyPolicy

enum SoSFImage::CopyPolicy

SoSFImage may be manipulating some large amounts of memory.

It is therefore convienent to be able to set the memory usage policy dynamically. By default, the memory policy is COPY, which is consistent with other OIV fields. The most likely to be efficient is NO_COPY. See also setNeverWrite.

Enumerator
COPY	Open Inventor will make a copy of the data (default)
NO_COPY	Passed buffer used , user will delete.
NO_COPY_AND_DELETE	Passed buffer used, SoSFImage will delete. Use this if memory is allocated with "new".
NO_COPY_AND_FREE	Passed buffer used, SoSFImage will free. Use this if memory is allocated with "malloc".

Definition at line 173 of file SoSFImage.h.

◆ DataType

enum SoSFImage::DataType

Encoding data type.

UNSIGNED_BYTE by default.

Enumerator
UNSIGNED_BYTE	UNSIGNED_BYTE.
UNSIGNED_SHORT	UNSIGNED_SHORT.
UNSIGNED_INT32	UNSIGNED_INT32.
SIGNED_BYTE	SIGNED_BYTE.
SIGNED_SHORT	SIGNED_SHORT.
SIGNED_INT32	SIGNED_INT32.
FLOAT	FLOAT.

Definition at line 147 of file SoSFImage.h.

Constructor & Destructor Documentation

◆ SoSFImage() [1/2]

SoSFImage::SoSFImage ( )

Default constructor.

◆ ~SoSFImage()

virtual SoSFImage::~SoSFImage ( )

virtual

Destructor.

◆ SoSFImage() [2/2]

SoSFImage::SoSFImage ( const SoSFImage & obj )

Copy constructor.

Member Function Documentation

◆ finishEditing()

void SoSFImage::finishEditing ( )

This method (along with startEditing())can be used to efficiently edit the values in an image field.

Doing a start/finishEditing is the same as doing a call to setSubValues on the whole texture. The getSubTexture will return one more updated regions when called after finishEditing.

◆ getClassTypeId()

static SoType SoSFImage::getClassTypeId ( )

static

Returns the type identifier for this class.

◆ getNumComponents()

int SoSFImage::getNumComponents ( ) const

inline

Returns image's number of components.

Definition at line 492 of file SoSFImage.h.

◆ getSubTexture() [1/4]

unsigned char * SoSFImage::getSubTexture	(	int	index,
		SbVec2i32 &	size,
		SbVec2i32 &	offset
	)

◆ getSubTexture() [2/4]

void * SoSFImage::getSubTexture	(	int	index,
		SbVec2i32 &	size,
		SbVec2i32 &	offset,
		DataType &	dataType
	)

◆ getSubTexture() [3/4]

unsigned char * SoSFImage::getSubTexture	(	int	index,
		SbVec2s &	size,
		SbVec2s &	offset
	)

Same as above.

Convenience method for the unsigned char datatype.

◆ getSubTexture() [4/4]

void * SoSFImage::getSubTexture	(	int	index,
		SbVec2s &	size,
		SbVec2s &	offset,
		DataType &	dataType
	)

Returns a buffer of a given subTexture set by setSubValue(), setSubValues() or a startEditing()/finishEditing() pair.

These methods append subTextures to a list. Also returns the size of the subtexture, the offset from the beginning of the image and the data type of the requested subImage.

◆ getTypeId()

virtual SoType SoSFImage::getTypeId ( ) const

virtual

Returns the type identifier for this specific instance.

Implements SoTypedObject.

◆ getValue() [1/4]

const unsigned char * SoSFImage::getValue	(	SbVec2i32 &	size,
		int &	nc
	)		const

◆ getValue() [2/4]

const void * SoSFImage::getValue	(	SbVec2i32 &	size,
		int &	nc,
		DataType &	dataType
	)		const

◆ getValue() [3/4]

const unsigned char * SoSFImage::getValue	(	SbVec2s &	size,
		int &	nc
	)		const

Same as above.

Convenience method for the unsigned char datatype.

◆ getValue() [4/4]

const void * SoSFImage::getValue	(	SbVec2s &	size,
		int &	nc,
		DataType &	dataType
	)		const

Returns the pixels in the image as an array of values of type <dataType>.

The size and nc arguments are filled in with the dimensions of the image and the number of components in the image. The number of bytes in the array returned will be size[0]*size[1]*nc*sizeof(<dataType>)*nc.

◆ hasSubTextures()

SbBool SoSFImage::hasSubTextures ( int & numSubTextures )

Returns TRUE if subTextures have been defined or FALSE if none have been defined.

Also returns the number of subTextures defined.

◆ hasTransparency()

SbBool SoSFImage::hasTransparency ( ) const

Returns TRUE if the image contains any transparent pixels.

Specifically if the image has 2 or 4 components and at least one pixel has an alpha value less then 255.

◆ isNeverWrite()

SbBool SoSFImage::isNeverWrite ( )

inline

Queries the "neverWrite" flag.

Definition at line 469 of file SoSFImage.h.

◆ operator!=()

int SoSFImage::operator!= ( const SoSFImage & f ) const

inline

Inequality test.

Definition at line 376 of file SoSFImage.h.

◆ operator=()

const SoSFImage & SoSFImage::operator= ( const SoSFImage & f )

Copy from another field of same type.

◆ operator==()

int SoSFImage::operator== ( const SoSFImage & f ) const

Equality test.

◆ setNeverWrite()

void SoSFImage::setNeverWrite ( SbBool neverWrite )

Sets the "neverWrite" flag.

As this field may have to handle large amounts of data and its representation in an .iv file is not very efficient, it is often a good idea not to allow that data to be written out when required by a write action. By default, the "neverWrite" condition is FALSE.

◆ setSubValue() [1/4]

void SoSFImage::setSubValue	(	const SbVec2i32 &	subSize,
		const SbVec2i32 &	offset,
		unsigned char *	bytes
	)

◆ setSubValue() [2/4]

void SoSFImage::setSubValue	(	const SbVec2i32 &	subSize,
		const SbVec2i32 &	offset,
		void *	data
	)

◆ setSubValue() [3/4]

void SoSFImage::setSubValue	(	const SbVec2s &	subSize,
		const SbVec2s &	offset,
		unsigned char *	bytes
	)

Same as above.

Convenience method for the unsigned char datatype.

◆ setSubValue() [4/4]

void SoSFImage::setSubValue	(	const SbVec2s &	subSize,
		const SbVec2s &	offset,
		void *	data
	)

This method can be used for subtexturing.

Instead of replacing the texture in texture memory, only parts of it are replaced. This is much faster and uses less memory. In any case this method affects the texture in processor memory. Note that the sub-image must have the same number of components as the one contained in this object. The texture in texture memory will not actually be modified until the next render traversal. See also startEditing(), finishEditing().

◆ setSubValues() [1/4]

void SoSFImage::setSubValues	(	const SbVec2i32 *	subSizes,
		const SbVec2i32 *	offsets,
		int	num,
		unsigned char **	subBytes
	)

◆ setSubValues() [2/4]

void SoSFImage::setSubValues	(	const SbVec2i32 *	subSizes,
		const SbVec2i32 *	offsets,
		int	num,
		void **	data
	)

◆ setSubValues() [3/4]

void SoSFImage::setSubValues	(	const SbVec2s *	subSizes,
		const SbVec2s *	offsets,
		int	num,
		unsigned char **	subBytes
	)

Same as above.

Convenience method for the unsigned char datatype.

◆ setSubValues() [4/4]

void SoSFImage::setSubValues	(	const SbVec2s *	subSizes,
		const SbVec2s *	offsets,
		int	num,
		void **	data
	)

This method can be used for subtexturing.

Instead of replacing the texture in texture memory, only parts of it are replaced. This is much faster and uses less memory. In any case this method affects the texture in processor memory. Note that the sub-images must have the same number of components as the one contained in this object. The texture in texture memory will not actually be modified until the next render traversal. See also startEditing(), finishEditing().

◆ setValue() [1/6]

void SoSFImage::setValue	(	const SbVec2i32 &	size,
		int	nc,
		const unsigned char *	bytes,
		CopyPolicy	copy = `COPY`
	)

◆ setValue() [2/6]

void SoSFImage::setValue	(	const SbVec2i32 &	size,
		int	nc,
		DataType	dataType,
		const void *	data,
		CopyPolicy	copy = `COPY`
	)

◆ setValue() [3/6]

void SoSFImage::setValue	(	const SbVec2i32 &	size,
		int	nc,
		DataType	dataType,
		SoBufferObject *	bufferObject,
		CopyPolicy	copy = `COPY`
	)

◆ setValue() [4/6]

void SoSFImage::setValue	(	const SbVec2s &	size,
		int	nc,
		const unsigned char *	bytes,
		CopyPolicy	copy = `COPY`
	)

Same as above.

Convenience method for the unsigned char datatype.

◆ setValue() [5/6]

void SoSFImage::setValue	(	const SbVec2s &	size,
		int	nc,
		DataType	dataType,
		const void *	data,
		CopyPolicy	copy = `COPY`
	)

Sets the value of this field to be an image of the given size, with the given number of components, and with the given pixel values.

size[0]*sizeof(<dataType>)*size[1]*sizeof(<dataType>)*nc bytes from the given array will be copied into internal storage maintained by the SoSFImage field.

At times, SoSFImage may need to manipulate large amounts of memory. Therefore, it is useful to be able to specify the memory usage policy dynamically. By default, the memory policy is COPY, which is consistent with other Open Inventor fields. The most likely to be efficient is NO_COPY. See also setNeverWrite().

◆ setValue() [6/6]

void SoSFImage::setValue	(	const SbVec2s &	size,
		int	nc,
		DataType	dataType,
		SoBufferObject *	bufferObject,
		CopyPolicy	copy = `COPY`
	)

◆ startEditing() [1/4]

unsigned char * SoSFImage::startEditing	(	SbVec2i32 &	size,
		int &	nc
	)

◆ startEditing() [2/4]

void * SoSFImage::startEditing	(	SbVec2i32 &	size,
		int &	nc,
		DataType &	dataType
	)

◆ startEditing() [3/4]

unsigned char * SoSFImage::startEditing	(	SbVec2s &	size,
		int &	nc
	)

Same as above.

Convenience method for the unsigned char datatype.

◆ startEditing() [4/4]

void * SoSFImage::startEditing	(	SbVec2s &	size,
		int &	nc,
		DataType &	dataType
	)

This method (along with finishEditing()) can be used to efficiently edit the values in an image field.

It returns the size of the image in the size and nc arguments; writing past the end of the array returned is a good way to cause hard-to-find core dumps.

Calling this method is the same as doing a call to setSubValues on the whole texture. The getSubTexture will return one more updated regions when called after finishEditing.

◆ toRasterImage()

SbRasterImage * SoSFImage::toRasterImage ( bool downSample = true ) const

Returns an instance of SbRasterImage filled with the content of this field.

It is useful to save the result of an SoRenderToTexture operation in feedback mode. The caller is responsible of the release of the returned raster image.

When the content is not of type UNSIGNED_BYTE the data is downsampled to UNSIGNED_BYTE unless the downSample parameter is set to false.

Returns NULL if the content cannot be converted to an SbRasterImage.

The documentation for this class was generated from the following file:

Inventor/fields/SoSFImage.h

Open Inventor Release 2024.2.1

Public Types

Public Member Functions

Static Public Member Functions

Detailed Description

SEE ALSO

Member Enumeration Documentation

◆ CopyPolicy

◆ DataType

Constructor & Destructor Documentation

◆ SoSFImage() [1/2]

◆ ~SoSFImage()

◆ SoSFImage() [2/2]

Member Function Documentation

◆ finishEditing()

◆ getClassTypeId()

◆ getNumComponents()

◆ getSubTexture() [1/4]

◆ getSubTexture() [2/4]

◆ getSubTexture() [3/4]

◆ getSubTexture() [4/4]

◆ getTypeId()

◆ getValue() [1/4]

◆ getValue() [2/4]

◆ getValue() [3/4]

◆ getValue() [4/4]

◆ hasSubTextures()

◆ hasTransparency()

◆ isNeverWrite()

◆ operator!=()

◆ operator=()

◆ operator==()

◆ setNeverWrite()

◆ setSubValue() [1/4]

◆ setSubValue() [2/4]

◆ setSubValue() [3/4]

◆ setSubValue() [4/4]

◆ setSubValues() [1/4]

◆ setSubValues() [2/4]

◆ setSubValues() [3/4]

◆ setSubValues() [4/4]

◆ setValue() [1/6]

◆ setValue() [2/6]

◆ setValue() [3/6]

◆ setValue() [4/6]

◆ setValue() [5/6]

◆ setValue() [6/6]

◆ startEditing() [1/4]

◆ startEditing() [2/4]

◆ startEditing() [3/4]

◆ startEditing() [4/4]

◆ toRasterImage()