Ogre::GpuProgramUsage Class Reference

This class makes the usage of a vertex and fragment programs (low-level or high-level), with a given set of parameters, explicit. More...

#include <OgreGpuProgramUsage.h>

List of all members.

Public Member Functions
	GpuProgramUsage (GpuProgramType gptype)
	Default constructor.
	GpuProgramUsage (const GpuProgramUsage &rhs)
	Copy constructor.
GpuProgramType	getType (void) const
	Gets the type of program we're trying to link to.
void	setProgramName (const String &name, bool resetParams=true)
	Sets the name of the program to use.
void	setProgram (GpuProgramPtr &prog)
	Sets the program to use.
const GpuProgramPtr &	getProgram () const
	Gets the program being used.
const String &	getProgramName (void) const
	Gets the program being used.
void	setParameters (GpuProgramParametersSharedPtr params)
	Sets the program parameters that should be used; because parameters can be shared between multiple usages for efficiency, this method is here for you to register externally created parameter objects.
GpuProgramParametersSharedPtr	getParameters (void)
	Gets the parameters being used here.
void	_load (void)
	Load this usage (and ensure program is loaded).
void	_unload (void)
	Unload this usage.
Protected Attributes
GpuProgramType	mType
GpuProgramPtr	mProgram
GpuProgramParametersSharedPtr	mParameters
	program parameters

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Detailed Description

This class makes the usage of a vertex and fragment programs (low-level or high-level), with a given set of parameters, explicit.

Remarks:

Using a vertex or fragment program can get fairly complex; besides the fairly rudimentary process of binding a program to the GPU for rendering, managing usage has few complications, such as:

• Programs can be high level (e.g. Cg, RenderMonkey) or low level (assembler). Using either should be relatively seamless, although high-level programs give you the advantage of being able to use named parameters, instead of just indexed registers
• Programs and parameters can be shared between multiple usages, in order to save memory
• When you define a user of a program, such as a material, you often want to be able to set up the definition but not load / compile / assemble the program at that stage, because it is not needed just yet. The program should be loaded when it is first needed, or earlier if specifically requested. The program may not be defined at this time, you may want to have scripts that can set up the definitions independent of the order in which those scripts are loaded.

This class packages up those details so you don't have to worry about them. For example, this class lets you define a high-level program and set up the parameters for it, without having loaded the program (which you normally could not do). When the program is loaded and compiled, this class will then validate the parameters you supplied earlier and turn them into runtime parameters.

Just incase it wasn't clear from the above, this class provides linkage to both GpuProgram and HighLevelGpuProgram, despite its name.

Definition at line 62 of file OgreGpuProgramUsage.h.

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Constructor & Destructor Documentation

Ogre::GpuProgramUsage::GpuProgramUsage (  GpuProgramType  gptype  )

Default constructor. Parameters: gptype  The type of program to link to

Ogre::GpuProgramUsage::GpuProgramUsage (  const GpuProgramUsage &  rhs  )

Copy constructor.

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Member Function Documentation

void Ogre::GpuProgramUsage::_load (  void   )

Load this usage (and ensure program is loaded).

void Ogre::GpuProgramUsage::_unload (  void   )

Unload this usage.

GpuProgramParametersSharedPtr Ogre::GpuProgramUsage::getParameters (  void   )

Gets the parameters being used here.

const GpuProgramPtr& Ogre::GpuProgramUsage::getProgram (   )  const

Gets the program being used. Definition at line 104 of file OgreGpuProgramUsage.h.

const String& Ogre::GpuProgramUsage::getProgramName (  void   )  const

Gets the program being used. Definition at line 106 of file OgreGpuProgramUsage.h. References Ogre::String.

GpuProgramType Ogre::GpuProgramUsage::getType (  void   )  const

Gets the type of program we're trying to link to. Definition at line 83 of file OgreGpuProgramUsage.h. References Ogre::GpuProgramType.

void Ogre::GpuProgramUsage::setParameters (  GpuProgramParametersSharedPtr  params  )

Sets the program parameters that should be used; because parameters can be shared between multiple usages for efficiency, this method is here for you to register externally created parameter objects. Otherwise, the parameters will be created for you when a program is linked.

void Ogre::GpuProgramUsage::setProgram (  GpuProgramPtr &  prog  )

Sets the program to use. Remarks: Note that this will create a fresh set of parameters from the new program being linked, so if you had previously set parameters you will have to set them again.

void Ogre::GpuProgramUsage::setProgramName (  const String &  name, bool  resetParams = true )

Sets the name of the program to use. Parameters: name  The name of the program to use resetParams  If true, this will create a fresh set of parameters from the new program being linked, so if you had previously set parameters you will have to set them again. If you set this to false, you must be absolutely sure that the parameters match perfectly, and in the case of named parameters refers to the indexes underlying them, not just the names.

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Member Data Documentation

GpuProgramParametersSharedPtr Ogre::GpuProgramUsage::mParameters [protected]

program parameters Definition at line 70 of file OgreGpuProgramUsage.h.

GpuProgramPtr Ogre::GpuProgramUsage::mProgram [protected]

Definition at line 67 of file OgreGpuProgramUsage.h.

GpuProgramType Ogre::GpuProgramUsage::mType [protected]

Definition at line 65 of file OgreGpuProgramUsage.h.

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

• OgreGpuProgramUsage.h

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Copyright © 2000-2005 by The OGRE Team

This work is licensed under a Creative Commons Attribution-ShareAlike 2.5 License.
Last modified Sun Mar 12 14:39:08 2006