MHWShaderSwatchGenerator Class Reference

#include <MHWShaderSwatchGenerator.h>

Class Description

Hardware shader swatch generator utility class.

Derived from the MSwatchRenderBase class as a utility for generating a swatch for a plugin hardware shader class. This class supports hardware shaders derived from both MPxHardwareShader and the older MPxHwShaderNode base classes.

Inheritance diagram for MHWShaderSwatchGenerator:

Public Member Functions
	MHWShaderSwatchGenerator (MObject obj, MObject renderObj, int res)
	Class constructor. More...
virtual bool	doIteration ()
	This method will be called from the MSwatchRenderRegister for generating a swatch image. More...
Public Member Functions inherited from MSwatchRenderBase
	MSwatchRenderBase (MObject obj, MObject renderObj, int res)
	Class constructor. More...
virtual	~MSwatchRenderBase ()
	Class destructor.
virtual bool	renderParallel ()
	Method indicates if the swatch is rendered parallel. More...
virtual void	cancelParallelRendering ()
	Method to cancel the parallel rendering. More...
MObject	swatchNode () const
	This method returns the node for which the swatch is required to be generated.
MObject	node () const
	This method returns the node that is used to compute the swatch.
int	resolution () const
	This method returns the expected resolution of the swatch.
MImage &	image ()
	This method returns the the render swatch as an image.
void	setRenderQuality (int)
	Method to set the render quality in which the swatch will be rendered. More...
int	renderQuality () const
	Returns the quality in which the swatch will be rendered. More...

Static Public Member Functions
static MSwatchRenderBase *	createObj (MObject obj, MObject renderObj, int res)
	Class constructor. More...
static const MString &	initialize ()
	This method sets a swatch name, and registers a new swatch generator creation function for the swatch name. More...
static void	getSwatchBackgroundColor (float &r, float &g, float &b, float &a)
	This method returns the default background color for the hardware rendered swatch. More...
Static Public Member Functions inherited from MSwatchRenderBase
static void	cancelCurrentSwatchRender ()
	The method cancels the swatch which is being rendered in parallel, and push the swatch render item back to the render queue after. More...
static void	enableSwatchRender (bool enable)
	Enable/disable swatch rendering. More...

Additional Inherited Members
Protected Member Functions inherited from MSwatchRenderBase
void	finishParallelRender ()
	Method to update the swatch image when the parallel rendering is finished. More...

Constructor & Destructor Documentation

OPENMAYA_MAJOR_NAMESPACE_OPEN MHWShaderSwatchGenerator	(	MObject	obj,
		MObject	renderObj,
		int	res
	)

Class constructor.

Initializes base class

Parameters

[in]	obj	The node object for which the swatch needs to be generated.
[in]	renderObj	The node used to actually compute the swatch. In most situations, this can be the same as obj. This parameter can be used to request the computation of the swatch on another node, and display the swatch on the obj node.
[in]	res	The expected resolution of the swatch image.

Member Function Documentation

MSwatchRenderBase * createObj ( MObject  obj, MObject  renderObj, int  resolution  )

static

Class constructor.

Saves the Node object and image resolution as data members for future use.

Parameters

[in]	obj	The node object for which the swatch needs to be generated.
[in]	renderObj	The node used to actually compute the swatch. In most situations, this can be the same as obj. This parameter can be used to request the computation of the swatch on another node, and display the swatch on the obj node.
[in]	resolution	The expected resolution of the swatch image.

Examples:

const MString & initialize ( )

static

This method sets a swatch name, and registers a new swatch generator creation function for the swatch name.

The string returned from this method can be used for node classification purpose.

Examples:

void getSwatchBackgroundColor ( float &  r, float &  g, float &  b, float &  a  )

static

This method returns the default background color for the hardware rendered swatch.

Parameters

[out]	r	Storage variable for red component.
[out]	g	Storage variable for green component.
[out]	b	Storage variable for blue component.
[out]	a	Storage variable for alpha component.

Examples:

bool doIteration ( )

virtual

This method will be called from the MSwatchRenderRegister for generating a swatch image.

This doIteration function is called repeatedly (during idle events) till it returns true.

Reimplemented from MSwatchRenderBase.

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

• MHWShaderSwatchGenerator.h
• MHWShaderSwatchGenerator.cpp