The SoImage class draws a 2D image on the viewport.An image can be specified either by using the image field, or by specifying a filename. If width and or height is specified, the image will be resized to match those values before it is displayed. More...

#include <Inventor/nodes/SoImage.h>

Inheritance diagram for SoImage:

Public Types
enum	VertAlignment { BOTTOM, HALF, TOP }

enum	HorAlignment { LEFT, CENTER, RIGHT }

Public Types inherited from SoShape
enum	TriangleShape { TRIANGLE_STRIP, TRIANGLE_FAN, TRIANGLES, POLYGON, QUADS, QUAD_STRIP, POINTS, LINES, LINE_STRIP }

Public Types inherited from SoNode
enum	NodeType { INVENTOR = 0x0000, VRML1 = 0x0001, VRML2 = 0x0002, INVENTOR_1 = 0x0004, INVENTOR_2_0 = 0x0008, INVENTOR_2_1 = 0x0010, INVENTOR_2_5 = 0x0020, INVENTOR_2_6 = 0x0040, COIN_1_0 = 0x0080, COIN_2_0 = 0x0100, EXTENSION = 0x0200, COIN_2_2 = 0x0400, COIN_2_3 = 0x0800, COIN_2_4 = 0x1000, INVENTOR_5_0 = 0x2000, COIN_2_5 = 0x4000, COIN_3_0 = 0x8000, INVENTOR_6_0 = 0x10000, COIN_4_0 = 0x20000 }

Public Member Functions
virtual SoType	getTypeId (void) const
	Returns the type identification of an object derived from a class inheriting SoBase. This is used for run-time type checking and "downward" casting. More...

	SoImage (void)

virtual void	GLRender (SoGLRenderAction *action)

virtual void	rayPick (SoRayPickAction *action)

virtual void	getPrimitiveCount (SoGetPrimitiveCountAction *action)

Public Member Functions inherited from SoShape
virtual SbBool	affectsState (void) const

virtual void	getBoundingBox (SoGetBoundingBoxAction *action)

virtual void	callback (SoCallbackAction *action)

const SoBoundingBoxCache *	getBoundingBoxCache (void) const

Public Member Functions inherited from SoNode
void	setOverride (const SbBool state)

SbBool	isOverride (void) const

void	setNodeType (const NodeType type)

NodeType	getNodeType (void) const

virtual SoNode *	copy (SbBool copyconnections=FALSE) const

virtual void	doAction (SoAction *action)

virtual void	GLRenderBelowPath (SoGLRenderAction *action)

virtual void	GLRenderInPath (SoGLRenderAction *action)

virtual void	GLRenderOffPath (SoGLRenderAction *action)

virtual void	getMatrix (SoGetMatrixAction *action)

virtual void	handleEvent (SoHandleEventAction *action)

virtual void	pick (SoPickAction *action)

virtual void	search (SoSearchAction *action)

virtual void	write (SoWriteAction *action)

virtual void	audioRender (SoAudioRenderAction *action)

virtual void	grabEventsSetup (void)

virtual void	grabEventsCleanup (void)

virtual void	startNotify (void)

uint32_t	getNodeId (void) const

virtual SoChildList *	getChildren (void) const

virtual void	writeInstance (SoOutput *out)

virtual SoNode *	addToCopyDict (void) const

virtual void	copyContents (const SoFieldContainer *from, SbBool copyconnections)

virtual SoFieldContainer *	copyThroughConnection (void) const

Public Member Functions inherited from SoFieldContainer
void	setToDefaults (void)

SbBool	hasDefaultValues (void) const

SbBool	fieldsAreEqual (const SoFieldContainer *container) const

void	copyFieldValues (const SoFieldContainer *container, SbBool copyconnections=FALSE)

SbBool	set (const char *const fielddata)

void	get (SbString &fielddata)

virtual int	getFields (SoFieldList &l) const

virtual int	getAllFields (SoFieldList &l) const

virtual SoField *	getField (const SbName &name) const

virtual SoField *	getEventIn (const SbName &name) const

virtual SoField *	getEventOut (const SbName &name) const

SbBool	getFieldName (const SoField *const field, SbName &name) const

SbBool	enableNotify (const SbBool flag)

SbBool	isNotifyEnabled (void) const

SbBool	set (const char fielddata, SoInput input)

void	get (SbString &fielddata, SoOutput *out)

virtual SbBool	validateNewFieldValue (SoField field, void newval)

virtual void	addWriteReference (SoOutput *out, SbBool isfromfield=FALSE)

SbBool	getIsBuiltIn (void) const

virtual void	getFieldsMemorySize (size_t &managed, size_t &unmanaged) const

void	setUserData (void *userdata) const

void *	getUserData (void) const

Public Member Functions inherited from SoBase
void	ref (void) const

void	unref (void) const

void	unrefNoDelete (void) const

int32_t	getRefCount (void) const

void	touch (void)

SbBool	isOfType (SoType type) const
	Returns `TRUE` if the type of this object is either of the same type or inherited from type. More...

virtual SbName	getName (void) const

virtual void	setName (const SbName &newname)

void	addAuditor (void *const auditor, const SoNotRec::Type type)

void	removeAuditor (void *const auditor, const SoNotRec::Type type)

const SoAuditorList &	getAuditors (void) const

SbBool	shouldWrite (void)

void	assertAlive (void) const

Static Public Member Functions
static SoType	getClassTypeId (void)

static void	initClass (void)

Static Public Member Functions inherited from SoShape
static SoType	getClassTypeId (void)

static void	initClass (void)

static void	getScreenSize (SoState *const state, const SbBox3f &boundingbox, SbVec2s &rectsize)

static float	getDecimatedComplexity (SoState *state, float complexity)

Static Public Member Functions inherited from SoNode
static uint32_t	getCompatibilityTypes (const SoType &nodetype)

static SoType	getClassTypeId (void)

static SoNode *	getByName (const SbName &name)

static int	getByName (const SbName &name, SoNodeList &l)

static void	initClass (void)

static void	initClasses (void)

static uint32_t	getNextNodeId (void)

static int	getActionMethodIndex (const SoType type)

static void	getBoundingBoxS (SoAction action, SoNode node)

static void	GLRenderS (SoAction action, SoNode node)

static void	callbackS (SoAction action, SoNode node)

static void	getMatrixS (SoAction action, SoNode node)

static void	handleEventS (SoAction action, SoNode node)

static void	pickS (SoAction action, SoNode node)

static void	rayPickS (SoAction action, SoNode node)

static void	searchS (SoAction action, SoNode node)

static void	writeS (SoAction action, SoNode node)

static void	audioRenderS (SoAction action, SoNode node)

static void	getPrimitiveCountS (SoAction action, SoNode node)

Static Public Member Functions inherited from SoFieldContainer
static void	initClass (void)

static SoType	getClassTypeId (void)

static void	cleanupClass (void)

static void	initCopyDict (void)

static void	addCopy (const SoFieldContainer orig, const SoFieldContainer copy)

static SoFieldContainer *	checkCopy (const SoFieldContainer *orig)

static SoFieldContainer *	findCopy (const SoFieldContainer *orig, const SbBool copyconnections)

static void	copyDone (void)

Static Public Member Functions inherited from SoBase
static void	initClass (void)
	Sets up initialization for data common to all instances of this class, like submitting necessary information to the Coin type system.

static SoType	getClassTypeId (void)
	This static method returns the SoType object associated with objects of this class.

static void	addName (SoBase const base, const char const name)

static void	removeName (SoBase const base, const char const name)

static void	incrementCurrentWriteCounter (void)

static void	decrementCurrentWriteCounter (void)

static SoBase *	getNamedBase (const SbName &name, SoType type)

static int	getNamedBases (const SbName &name, SoBaseList &baselist, SoType type)

static SbBool	read (SoInput input, SoBase &base, SoType expectedtype)

static void	setInstancePrefix (const SbString &c)

static void	setTraceRefs (SbBool trace)

static SbBool	getTraceRefs (void)

static SbBool	connectRoute (SoInput *input, const SbName &fromnodename, const SbName &fromfieldname, const SbName &tonodename, const SbName &tofieldname)

static SbBool	readRoute (SoInput *input)

Public Attributes
SoSFInt32	width

SoSFInt32	height

SoSFEnum	vertAlignment

SoSFEnum	horAlignment

SoSFImage	image

SoSFString	filename

Protected Member Functions
virtual const SoFieldData *	getFieldData (void) const

virtual	~SoImage ()

virtual void	generatePrimitives (SoAction *action)

virtual void	computeBBox (SoAction *action, SbBox3f &box, SbVec3f &center)

virtual SbBool	readInstance (SoInput *in, unsigned short flags)

virtual void	notify (SoNotList *list)

int	getReadStatus (void)

void	setReadStatus (SbBool flag)

Protected Member Functions inherited from SoShape
	SoShape (void)

virtual	~SoShape ()

float	getComplexityValue (SoAction *action)

virtual SbBool	shouldGLRender (SoGLRenderAction *action)

void	beginSolidShape (SoGLRenderAction *action)

void	endSolidShape (SoGLRenderAction *action)

void	GLRenderBoundingBox (SoGLRenderAction *action)

SbBool	shouldPrimitiveCount (SoGetPrimitiveCountAction *action)

SbBool	shouldRayPick (SoRayPickAction *const action)

void	computeObjectSpaceRay (SoRayPickAction *const action)

void	computeObjectSpaceRay (SoRayPickAction *const action, const SbMatrix &matrix)

virtual SoDetail *	createTriangleDetail (SoRayPickAction action, const SoPrimitiveVertex v1, const SoPrimitiveVertex v2, const SoPrimitiveVertex v3, SoPickedPoint *pp)

virtual SoDetail *	createLineSegmentDetail (SoRayPickAction action, const SoPrimitiveVertex v1, const SoPrimitiveVertex v2, SoPickedPoint pp)

virtual SoDetail *	createPointDetail (SoRayPickAction action, const SoPrimitiveVertex v, SoPickedPoint *pp)

void	invokeTriangleCallbacks (SoAction const action, const SoPrimitiveVertex const v1, const SoPrimitiveVertex const v2, const SoPrimitiveVertex const v3)

void	invokeLineSegmentCallbacks (SoAction const action, const SoPrimitiveVertex const v1, const SoPrimitiveVertex *const v2)

void	invokePointCallbacks (SoAction const action, const SoPrimitiveVertex const v)

void	beginShape (SoAction const action, const TriangleShape shapetype, SoDetail const detail=NULL)

void	shapeVertex (const SoPrimitiveVertex *const v)

void	endShape (void)

void	generateVertex (SoPrimitiveVertex const pv, const SbVec3f &point, const SbBool useTexFunc, const SoMultiTextureCoordinateElement const tce, const float s, const float t, const SbVec3f &normal)

void	generateVertex (SoPrimitiveVertex const pv, const SbVec3f &point, const SbBool useTexFunc, const SoMultiTextureCoordinateElement const tce, const float s, const float t, const float r, const SbVec3f &normal)

SbBool	startVertexArray (SoGLRenderAction action, const SoCoordinateElement coords, const SbVec3f *pervertexnormals, const SbBool texpervertex, const SbBool colorpervertex)

void	finishVertexArray (SoGLRenderAction *action, const SbBool vbo, const SbBool normpervertex, const SbBool texpervertex, const SbBool colorpervertex)

Protected Member Functions inherited from SoNode
	SoNode (void)

virtual	~SoNode ()

Protected Member Functions inherited from SoFieldContainer
	SoFieldContainer (void)

virtual	~SoFieldContainer ()

Protected Member Functions inherited from SoBase
	SoBase (void)

virtual	~SoBase ()

virtual void	destroy (void)

SbBool	hasMultipleWriteRefs (void) const

SbBool	writeHeader (SoOutput *out, SbBool isgroup, SbBool isengine) const

void	writeFooter (SoOutput *out) const

virtual const char *	getFileFormatName (void) const

virtual SoNotRec	createNotRec (void)

Static Protected Member Functions
static const SoFieldData **	getFieldDataPtr (void)

Static Protected Member Functions inherited from SoShape
static const SoFieldData **	getFieldDataPtr (void)

Static Protected Member Functions inherited from SoNode
static const SoFieldData **	getFieldDataPtr (void)

static void	setNextActionMethodIndex (int index)

static int	getNextActionMethodIndex (void)

static void	incNextActionMethodIndex (void)

static void	setCompatibilityTypes (const SoType &nodetype, const uint32_t bitmask)

Static Protected Member Functions inherited from SoBase
static uint32_t	getCurrentWriteCounter (void)

static void	staticDataLock (void)

static void	staticDataUnlock (void)

Additional Inherited Members
Protected Types inherited from SoBase
enum	BaseFlags { IS_ENGINE = 0x01, IS_GROUP = 0x02 }

Protected Attributes inherited from SoNode
uint32_t	uniqueId

Protected Attributes inherited from SoFieldContainer
SbBool	isBuiltIn

Static Protected Attributes inherited from SoNode
static uint32_t	nextUniqueId = 1

static int	nextActionMethodIndex = 0

Detailed Description

The SoImage class draws a 2D image on the viewport.

An image can be specified either by using the image field, or by specifying a filename. If width and or height is specified, the image will be resized to match those values before it is displayed.

The current modelview matrix will be used to find the viewport position, and the image is rendered in that position, with z-buffer testing activated.

Here's a simple, stand-alone example on how to set up and show an SoImage:

#include <stdlib.h>
#include <Inventor/Qt/SoQt.h>
#include <Inventor/Qt/viewers/SoQtExaminerViewer.h>
#include <Inventor/nodes/SoSeparator.h>
#include <Inventor/nodes/SoCamera.h>
#include <Inventor/nodes/SoCube.h>
#include <Inventor/nodes/SoImage.h>
static void
mandel(double sr, double si, double width, double height,
       int bwidth, int bheight, int mult, unsigned char * bmp, int n)
{
  double zr, zr_old, zi, cr, ci;
  int w;
  for (int y=0; y<bheight; y++)
    for (int x=0; x<bwidth; x++) {
      cr = ((double)(x)/(double)(bwidth))*width+sr;
      ci = ((double)(y)/(double)(bheight))*height+si;
      zr = zi = 0.0;
      for (w = 0; (w < n) && (zr*zr + zi*zi)<n; w++) {
        zr_old = zr;
        zr = zr*zr - zi*zi + cr;
        zi = 2*zr_old*zi + ci;
      }
      bmp[y*bwidth+x] = w*mult;
    }
}
int
main(int argc, char ** argv)
{
  QWidget * mainwin = SoQt::init(argv[0]);
  SoSeparator * root = new SoSeparator;
  root->ref();
  const int IMGWIDTH = 256;
  const int IMGHEIGHT = 256;
  unsigned char * img = new unsigned char[IMGWIDTH * IMGHEIGHT];
  mandel(-0.5, 0.6, 0.025, 0.025, IMGWIDTH, IMGHEIGHT, 1, img, 256);
  SoImage * nimage = new SoImage;
  nimage->vertAlignment = SoImage::HALF;
  nimage->horAlignment = SoImage::CENTER;
  nimage->image.setValue(SbVec2s(IMGWIDTH, IMGHEIGHT), 1, img);
  SoCube * cube = new SoCube;
  root->addChild(cube);
  root->addChild(nimage);
  SoQtExaminerViewer * viewer = new SoQtExaminerViewer(mainwin);
  viewer->setSceneGraph(root);
  viewer->setTitle("SoImage use");
  viewer->show();
  SoCamera * cam = viewer->getCamera();
  cam->position = SbVec3f(0, 0, 50);
  cam->focalDistance = 50;
  SoQt::show(mainwin);
  SoQt::mainLoop();
  delete viewer;
  root->unref();
  delete img;
  return 0;
}

Note that an SoImage node in the scene graph will have it's positioning / rendering influenced by the current viewport and camera. This has important implications for how to layout your scene graph for the best possible rendering performance. See the note about this issue in the SoText2 class documentation.

SoScale nodes can not be used to influence the dimensions of the rendering output of SoImage nodes.

FILE FORMAT/DEFAULTS:

Image {
    width -1
    height -1
    vertAlignment BOTTOM
    horAlignment LEFT
    image 0 0 0
    filename ""
}

Since: TGS Inventor 2.5; Coin 1.0

Member Enumeration Documentation

enum SoImage::VertAlignment

Vertical alignment for image.

Enumerator
BOTTOM	Vertical alignment at bottom of image.
HALF	Vertical alignment at center of image.
TOP	Vertical alignment at top of image.

enum SoImage::HorAlignment

Horizontal alignment for image.

Enumerator
LEFT	Horizontal alignment at left border.
CENTER	Horizontal alignment at center of image.
RIGHT	Horizontal alignment ar right border.

Constructor & Destructor Documentation

SoImage::SoImage ( void )

Constructor.

SoImage::~SoImage ( )

protectedvirtual

Destructor.

Member Function Documentation

SoType SoImage::getTypeId ( void ) const

virtual

Returns the type identification of an object derived from a class inheriting SoBase. This is used for run-time type checking and "downward" casting.

Usage example:

void foo(SoNode * node)
{
  if (node->getTypeId() == SoFile::getClassTypeId()) {
    SoFile * filenode = (SoFile *)node;  // safe downward cast, knows the type
  }
}

For application programmers wanting to extend the library with new nodes, engines, nodekits, draggers or others: this method needs to be overridden in all subclasses. This is typically done as part of setting up the full type system for extension classes, which is usually accomplished by using the pre-defined macros available through for instance Inventor/nodes/SoSubNode.h (SO_NODE_INIT_CLASS and SO_NODE_CONSTRUCTOR for node classes), Inventor/engines/SoSubEngine.h (for engine classes) and so on.

For more information on writing Coin extensions, see the class documentation of the toplevel superclasses for the various class groups.

Reimplemented from SoShape.

const SoFieldData * SoImage::getFieldData ( void ) const

protectedvirtual

Returns a pointer to the class-wide field data storage object for this instance. If no fields are present, returns NULL.

Reimplemented from SoShape.

void SoImage::GLRender ( SoGLRenderAction * action )

virtual

Action method for the SoGLRenderAction.

This is called during rendering traversals. Nodes influencing the rendering state in any way or who wants to throw geometry primitives at OpenGL overrides this method.

Reimplemented from SoShape.

void SoImage::rayPick ( SoRayPickAction * action )

virtual

Calculates picked point based on primitives generated by subclasses.

Reimplemented from SoShape.

void SoImage::getPrimitiveCount ( SoGetPrimitiveCountAction * action )

virtual

Action method for the SoGetPrimitiveCountAction.

Calculates the number of triangle, line segment and point primitives for the node and adds these to the counters of the action.

Nodes influencing how geometry nodes calculates their primitive count also overrides this method to change the relevant state variables.

Reimplemented from SoShape.

void SoImage::generatePrimitives ( SoAction * action )

protectedvirtual

Will generate a textured quad, representing the image in 3D.

Implements SoShape.

void SoImage::computeBBox	(	SoAction *	action,
		SbBox3f &	box,
		SbVec3f &	center
	)

protectedvirtual

Implemented by SoShape subclasses to let the SoShape superclass know the exact size and weighted center point of the shape's bounding box.

The bounding box and center point should be calculated and returned in the local coordinate system.

The method implements action behavior for shape nodes for SoGetBoundingBoxAction. It is invoked from SoShape::getBoundingBox(). (Subclasses should not override SoNode::getBoundingBox().)

The box parameter sent in is guaranteed to be an empty box, while center is undefined upon function entry.

Implements SoShape.

SbBool SoImage::readInstance	(	SoInput *	in,
		unsigned short	flags
	)

protectedvirtual

This method is mainly intended for internal use during file import operations.

It reads a definition of an instance from the input stream in. The input stream state points to the start of a serialized / persistant representation of an instance of this class type.

TRUE or FALSE is returned, depending on if the instantiation and configuration of the new object of this class type went ok or not. The import process should be robust and handle corrupted input streams by returning FALSE.

flags is used internally during binary import when reading user extension nodes, group nodes or engines.

Reimplemented from SoNode.

void SoImage::notify ( SoNotList * l )

protectedvirtual

Notifies all auditors for this instance when changes are made.

Reimplemented from SoShape.

int SoImage::getReadStatus ( void )

protected

Returns TRUE if node was read ok.

void SoImage::setReadStatus ( SbBool flag )

protected

Set read status for this node.

Member Data Documentation

SoSFInt32 SoImage::width

If bigger than 0, resize image to this width before rendering. Default value is -1 (ie "don't resize").

SoSFInt32 SoImage::height

If bigger than 0, resize image to this height before rendering. Default value is -1 (ie "don't resize").

SoSFEnum SoImage::vertAlignment

Vertical alignment. Default value is SoImage::BOTTOM.

SoSFEnum SoImage::horAlignment

Horizontal alignment. Default value is SoImage::LEFT.

SoSFImage SoImage::image

Inline image data. Default empty.

SoSFString SoImage::filename

Image filename. Default empty.

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

SoImage.h
SoImage.cpp

Public Types

Public Member Functions

Static Public Member Functions

Public Attributes

Protected Member Functions

Static Protected Member Functions

Additional Inherited Members

Detailed Description

Member Enumeration Documentation

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation