VTK
Public Types | Public Member Functions | Static Public Member Functions | Protected Member Functions | Protected Attributes
vtkGaussianBlurPass Class Reference

Implement a post-processing Gaussian blur render pass. More...

#include <vtkGaussianBlurPass.h>

Inheritance diagram for vtkGaussianBlurPass:
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Collaboration diagram for vtkGaussianBlurPass:
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List of all members.

Public Types

typedef vtkImageProcessingPass Superclass
- Public Types inherited from vtkImageProcessingPass
- Public Types inherited from vtkRenderPass
- Public Types inherited from vtkObject

Public Member Functions

virtual const char * GetClassName ()
virtual int IsA (const char *type)
void PrintSelf (ostream &os, vtkIndent indent)
void ReleaseGraphicsResources (vtkWindow *w)
virtual void Render (const vtkRenderState *s)
- Public Member Functions inherited from vtkImageProcessingPass
virtual vtkRenderPassGetDelegatePass ()
virtual void SetDelegatePass (vtkRenderPass *delegatePass)
- Public Member Functions inherited from vtkRenderPass
virtual int GetNumberOfRenderedProps ()
- Public Member Functions inherited from vtkObject
virtual void DebugOn ()
virtual void DebugOff ()
unsigned char GetDebug ()
void SetDebug (unsigned char debugFlag)
virtual void Modified ()
virtual unsigned long GetMTime ()
unsigned long AddObserver (unsigned long event, vtkCommand *, float priority=0.0f)
unsigned long AddObserver (const char *event, vtkCommand *, float priority=0.0f)
vtkCommandGetCommand (unsigned long tag)
void RemoveObserver (vtkCommand *)
void RemoveObservers (unsigned long event, vtkCommand *)
void RemoveObservers (const char *event, vtkCommand *)
int HasObserver (unsigned long event, vtkCommand *)
int HasObserver (const char *event, vtkCommand *)
void RemoveObserver (unsigned long tag)
void RemoveObservers (unsigned long event)
void RemoveObservers (const char *event)
void RemoveAllObservers ()
int HasObserver (unsigned long event)
int HasObserver (const char *event)
template<class U , class T >
unsigned long AddObserver (unsigned long event, U observer, void(T::*callback)(), float priority=0.0f)
template<class U , class T >
unsigned long AddObserver (unsigned long event, U observer, void(T::*callback)(vtkObject *, unsigned long, void *), float priority=0.0f)
int InvokeEvent (unsigned long event, void *callData)
int InvokeEvent (const char *event, void *callData)
int InvokeEvent (unsigned long event)
int InvokeEvent (const char *event)
- Public Member Functions inherited from vtkObjectBase
const char * GetClassName () const
virtual void Delete ()
virtual void FastDelete ()
void Print (ostream &os)
virtual void Register (vtkObjectBase *o)
virtual void UnRegister (vtkObjectBase *o)
void SetReferenceCount (int)
void PrintRevisions (ostream &os)
virtual void PrintHeader (ostream &os, vtkIndent indent)
virtual void PrintTrailer (ostream &os, vtkIndent indent)
int GetReferenceCount ()

Static Public Member Functions

static vtkGaussianBlurPassNew ()
static int IsTypeOf (const char *type)
static vtkGaussianBlurPassSafeDownCast (vtkObject *o)

Protected Member Functions

 vtkGaussianBlurPass ()
virtual ~vtkGaussianBlurPass ()
- Protected Member Functions inherited from vtkImageProcessingPass
 vtkImageProcessingPass ()
virtual ~vtkImageProcessingPass ()
void RenderDelegate (const vtkRenderState *s, int width, int height, int newWidth, int newHeight, vtkFrameBufferObject *fbo, vtkTextureObject *target)
- Protected Member Functions inherited from vtkRenderPass
 vtkRenderPass ()
virtual ~vtkRenderPass ()
void UpdateCamera (vtkRenderer *renderer)
void ClearLights (vtkRenderer *renderer)
void UpdateLightGeometry (vtkRenderer *renderer)
void UpdateLights (vtkRenderer *renderer)
void UpdateGeometry (vtkRenderer *renderer)
void SetLastRenderingUsedDepthPeeling (vtkRenderer *renderer, bool value)
- Protected Member Functions inherited from vtkObject
 vtkObject ()
virtual ~vtkObject ()
virtual void RegisterInternal (vtkObjectBase *, int check)
virtual void UnRegisterInternal (vtkObjectBase *, int check)
void InternalGrabFocus (vtkCommand *mouseEvents, vtkCommand *keypressEvents=NULL)
void InternalReleaseFocus ()
- Protected Member Functions inherited from vtkObjectBase
 vtkObjectBase ()
virtual ~vtkObjectBase ()
virtual void CollectRevisions (ostream &os)
virtual void ReportReferences (vtkGarbageCollector *)
 vtkObjectBase (const vtkObjectBase &)
void operator= (const vtkObjectBase &)

Protected Attributes

bool Supported
bool SupportProbed
vtkFrameBufferObjectFrameBufferObject
vtkTextureObjectPass1
vtkTextureObjectPass2
vtkShaderProgram2BlurProgram
- Protected Attributes inherited from vtkImageProcessingPass
vtkRenderPassDelegatePass
- Protected Attributes inherited from vtkRenderPass
int NumberOfRenderedProps
- Protected Attributes inherited from vtkObject
unsigned char Debug
vtkTimeStamp MTime
vtkSubjectHelper * SubjectHelper
- Protected Attributes inherited from vtkObjectBase
int ReferenceCount
vtkWeakPointerBase ** WeakPointers

Detailed Description

Implement a post-processing Gaussian blur render pass.

Blur the image renderered by its delegate. Blurring uses a Gaussian low-pass filter with a 5x5 kernel.

This pass expects an initialized depth buffer and color buffer. Initialized buffers means they have been cleared with farest z-value and background color/gradient/transparent color. An opaque pass may have been performed right after the initialization.

The delegate is used once.

Its delegate is usually set to a vtkCameraPass or to a post-processing pass.

This pass requires a OpenGL context that supports texture objects (TO), framebuffer objects (FBO) and GLSL. If not, it will emit an error message and will render its delegate and return.

Implementation:
As the filter is separable, it first blurs the image horizontally and then vertically. This reduces the number of texture sampling to 5 per pass. In addition, as texture sampling can already blend texel values in linear mode, by adjusting the texture coordinate accordingly, only 3 texture sampling are actually necessary. Reference: OpenGL Bloom Toturial by Philip Rideout, section Exploit Hardware Filtering http://prideout.net/bloom/index.php#Sneaky
See also:
vtkRenderPass
Tests:
vtkGaussianBlurPass (Tests)

Definition at line 63 of file vtkGaussianBlurPass.h.


Member Typedef Documentation

Reimplemented from vtkImageProcessingPass.

Definition at line 67 of file vtkGaussianBlurPass.h.


Constructor & Destructor Documentation

vtkGaussianBlurPass::vtkGaussianBlurPass ( )
protected

Default constructor. DelegatePass is set to NULL.

virtual vtkGaussianBlurPass::~vtkGaussianBlurPass ( )
protectedvirtual

Destructor.


Member Function Documentation

static vtkGaussianBlurPass* vtkGaussianBlurPass::New ( )
static

Create an object with Debug turned off, modified time initialized to zero, and reference counting on.

Reimplemented from vtkObject.

virtual const char* vtkGaussianBlurPass::GetClassName ( )
virtual

Reimplemented from vtkImageProcessingPass.

static int vtkGaussianBlurPass::IsTypeOf ( const char *  name)
static

Return 1 if this class type is the same type of (or a subclass of) the named class. Returns 0 otherwise. This method works in combination with vtkTypeMacro found in vtkSetGet.h.

Reimplemented from vtkImageProcessingPass.

virtual int vtkGaussianBlurPass::IsA ( const char *  name)
virtual

Return 1 if this class is the same type of (or a subclass of) the named class. Returns 0 otherwise. This method works in combination with vtkTypeMacro found in vtkSetGet.h.

Reimplemented from vtkImageProcessingPass.

static vtkGaussianBlurPass* vtkGaussianBlurPass::SafeDownCast ( vtkObject o)
static

Reimplemented from vtkImageProcessingPass.

void vtkGaussianBlurPass::PrintSelf ( ostream &  os,
vtkIndent  indent 
)
virtual

Methods invoked by print to print information about the object including superclasses. Typically not called by the user (use Print() instead) but used in the hierarchical print process to combine the output of several classes.

Reimplemented from vtkImageProcessingPass.

virtual void vtkGaussianBlurPass::Render ( const vtkRenderState s)
virtual

Perform rendering according to a render state s.

Precondition:
s_exists: s!=0

Implements vtkRenderPass.

void vtkGaussianBlurPass::ReleaseGraphicsResources ( vtkWindow w)
virtual

Release graphics resources and ask components to release their own resources.

Precondition:
w_exists: w!=0

Reimplemented from vtkImageProcessingPass.


Member Data Documentation

vtkFrameBufferObject* vtkGaussianBlurPass::FrameBufferObject
protected

Graphics resources.

Definition at line 91 of file vtkGaussianBlurPass.h.

vtkTextureObject* vtkGaussianBlurPass::Pass1
protected

Graphics resources.

Definition at line 92 of file vtkGaussianBlurPass.h.

vtkTextureObject* vtkGaussianBlurPass::Pass2
protected

Graphics resources.

Definition at line 93 of file vtkGaussianBlurPass.h.

vtkShaderProgram2* vtkGaussianBlurPass::BlurProgram
protected

Graphics resources.

Definition at line 94 of file vtkGaussianBlurPass.h.

bool vtkGaussianBlurPass::Supported
protected

Definition at line 97 of file vtkGaussianBlurPass.h.

bool vtkGaussianBlurPass::SupportProbed
protected

Definition at line 98 of file vtkGaussianBlurPass.h.


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