OGRE  2.3
Object-Oriented Graphics Rendering Engine
Ogre::TextureGpuListener Class Referenceabstract

#include <OgreTextureGpuListener.h>

+ Inheritance diagram for Ogre::TextureGpuListener:

Public Types

enum  Reason {
  Unknown , FromStorageToSysRam , FromSysRamToStorage , GainedResidency ,
  LostResidency , PoolTextureSlotChanged , ResidentToSysRamSync , MetadataCacheOutOfDate ,
  ExceptionThrown , FsaaSettingAlteredByApi , ReadyForRendering , Deleted

Public Member Functions

virtual ~TextureGpuListener ()
virtual void notifyTextureChanged (TextureGpu *texture, TextureGpuListener::Reason reason, void *extraData)=0
 Called when a TextureGpu changed in a way that affects how it is displayed: More...
virtual bool shouldStayLoaded (TextureGpu *texture)
 Return true if this TextureGpu should likely stay loaded or else graphical changes could occur. More...

Member Enumeration Documentation

◆ Reason


OnStorage -> OnSystemRam.


OnSystemRam -> OnStorage.


OnStorage -> Resident OnSystemRam -> Resident See ReadyForRendering.


Resident -> OnStorage Resident -> OnSystemRam.


Only called while TextureGpu is still Resident, and strategy is AlwaysKeepSystemRamCopy.

This listener happens when something was done to the TextureGpu that modifies its contents in the GPU, and were thus forced to sync those values back to SystemRam. This listener calls tells that sync is over.


The Metadata cache was out of date and we had to do a ping-pong.

Expect this to be followed by at least LostResidency and GainedResidency calls

This is very important, because if you were expecting certain sequence of calls (e.g. you were expecting a LostResidency soon to arrive), expect that to be changed.

See TextureGpuManager for details about the metadata cache.


Called when the worker thread caught an exception.

This exception has already been logged, and the texture resumed loading normally with a white 2x2 RGBA8 fallback.

This listener will get called from the main thread.

The texture may still have pending residency transitions (e.g. it may still be loading the 2x2 fallback)

Cast Exception e = reinterpret_cast<Exception>( extraData ); to know more info


Requested FSAA (MSAA / CSAA / EQAA / etc) is not supported by the API, and thus the setting had to be downgraded.

Note this may happen on device lost, and a new GPU became in use; thus it's possible for a TextureGpu to initially support certain FSAA but later change.


This Reason is called when TextureGpu::notifyDataIsReady is called.

This normally means worker thread is done loading texture from file and uploading it to GPU; and can now be used for rendering. It does NOT mean that Ogre has finished issueing rendering commands to a RenderTexture and is now ready to be presented to the monitor.


Constructor & Destructor Documentation

◆ ~TextureGpuListener()

virtual Ogre::TextureGpuListener::~TextureGpuListener ( )

Member Function Documentation

◆ notifyTextureChanged()

virtual void Ogre::TextureGpuListener::notifyTextureChanged ( TextureGpu texture,
TextureGpuListener::Reason  reason,
void *  extraData 
pure virtual

Called when a TextureGpu changed in a way that affects how it is displayed:

  1. TextureGpu::notifyDataIsReady got called (texture is ready to be displayed)
  2. Texture changed residency status.
  3. Texture is being deleted. It won't be a valid pointer after this call.

Implemented in Ogre::DefaultTextureGpuManagerListener, Ogre::TextureGpuManager, Ogre::Light, Ogre::HlmsComputeJob, Ogre::Decal, Ogre::AsyncTextureTicket, Ogre::CompositorPassUav, Ogre::Font, Ogre::VctLighting, and Ogre::OGRE_HLMS_TEXTURE_BASE_CLASS.

◆ shouldStayLoaded()

virtual bool Ogre::TextureGpuListener::shouldStayLoaded ( TextureGpu texture)

Return true if this TextureGpu should likely stay loaded or else graphical changes could occur.

Return false if it is certainly safe to unload.

Reimplemented in Ogre::VctLighting, and Ogre::OGRE_HLMS_TEXTURE_BASE_CLASS.

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