Abstract class representing a loadable resource (e.g. More...

#include <OgreResource.h>

Inheritance diagram for Ogre::Resource:

Classes
class	Listener

Public Types
enum	LoadingFlags { LF_DEFAULT = 0 , LF_INCLUDE_NON_RELOADABLE = 1 , LF_ONLY_UNREFERENCED = 2 , LF_ONLY_UNREFERENCED_INCLUDE_NON_RELOADABLE = 3 , LF_PRESERVE_STATE = 4 , LF_MARKED_FOR_RELOAD = 8 }
	Enum that allow to choose subset of unloaded/reloaded resources and to adjust reloading behavior. More...

enum	LoadingState { LOADSTATE_UNLOADED , LOADSTATE_LOADING , LOADSTATE_LOADED , LOADSTATE_UNLOADING , LOADSTATE_PREPARED , LOADSTATE_PREPARING , LOADSTATE_UNLOADED_MARKED_FOR_RELOAD }
	Enum identifying the loading state of the resource. More...

Public Member Functions
	Resource (ResourceManager creator, const String &name, ResourceHandle handle, const String &group, bool isManual=false, ManualResourceLoader loader=0)
	Standard constructor. More...

virtual	~Resource ()
	Virtual destructor. More...

virtual void	_dirtyState ()
	Manually mark the state of this resource as having been changed. More...

virtual void	_fireLoadingComplete (bool wasBackgroundLoaded)
	Firing of loading complete event. More...

virtual void	_firePreparingComplete (bool wasBackgroundLoaded)
	Firing of preparing complete event. More...

virtual void	_fireUnloadingComplete ()
	Firing of unloading complete event. More...

virtual void	_notifyOrigin (const String &origin)
	Notify this resource of it's origin. More...

virtual void	addListener (Listener *lis)
	Register a listener on this resource. More...

virtual size_t	calculateSize () const
	Calculate the size of a resource; this will only be called after 'load'. More...

virtual void	changeGroupOwnership (const String &newGroup)
	Change the resource group ownership of a Resource. More...

virtual void	escalateLoading ()
	Escalates the loading of a background loaded resource. More...

virtual ResourceManager *	getCreator ()
	Gets the manager which created this resource. More...

virtual const String &	getGroup () const
	Gets the group which this resource is a member of. More...

virtual ResourceHandle	getHandle () const

virtual LoadingState	getLoadingState () const
	Returns the current loading state. More...

virtual const String &	getName () const
	Gets resource name. More...

virtual const String &	getOrigin () const
	Get the origin of this resource, e.g. More...

virtual size_t	getSize () const
	Retrieves info about the size of the resource. More...

virtual size_t	getStateCount () const
	Returns the number of times this resource has changed state, which generally means the number of times it has been loaded. More...

virtual bool	isBackgroundLoaded () const
	Returns whether this Resource has been earmarked for background loading. More...

virtual bool	isLoaded () const
	Returns true if the Resource has been loaded, false otherwise. More...

virtual bool	isLoading () const
	Returns whether the resource is currently in the process of background loading. More...

virtual bool	isManuallyLoaded () const
	Is this resource manually loaded? More...

virtual bool	isPrepared () const
	Returns true if the Resource has been prepared, false otherwise. More...

virtual bool	isReloadable () const
	Returns true if the Resource is reloadable, false otherwise. More...

virtual void	load (bool backgroundThread=false)
	Loads the resource, if it is not already. More...

bool	markForReload ()

virtual void	prepare (bool backgroundThread=false)
	Prepares the resource for load, if it is not already. More...

virtual void	reload (LoadingFlags flags=LF_DEFAULT)
	Reloads the resource, if it is already loaded. More...

virtual void	removeListener (Listener *lis)
	Remove a listener on this resource. More...

virtual void	setBackgroundLoaded (bool bl)
	Tells the resource whether it is background loaded or not. More...

virtual void	setManuallyLoaded (bool isManual)
	Set "Is this resource manually loaded?". More...

virtual void	setToLoaded ()
	Change the Resource loading state to loaded. More...

virtual void	touch ()
	'Touches' the resource to indicate it has been used. More...

virtual void	unload ()
	Unloads the resource; this is not permanent, the resource can be reloaded later if required. More...

Public Member Functions inherited from Ogre::StringInterface
	StringInterface ()

virtual	~StringInterface ()
	Virtual destructor, see Effective C++. More...

virtual void	copyParametersTo (StringInterface *dest) const
	Method for copying this object's parameters to another object. More...

ParamDictionary *	getParamDictionary ()
	Retrieves the parameter dictionary for this class. More...

const ParamDictionary *	getParamDictionary () const

virtual String	getParameter (const String &name) const
	Generic parameter retrieval method. More...

const ParameterList &	getParameters () const
	Retrieves a list of parameters valid for this object. More...

virtual bool	setParameter (const String &name, const String &value)
	Generic parameter setting method. More...

virtual void	setParameterList (const NameValuePairList &paramList)
	Generic multiple parameter setting method. More...

Public Attributes
	OGRE_AUTO_MUTEX

Additional Inherited Members
Static Public Member Functions inherited from Ogre::StringInterface
static void	cleanupDictionary ()
	Cleans up the static 'msDictionary' required to reset Ogre, otherwise the containers are left with invalid pointers, which will lead to a crash as soon as one of the ResourceManager implementers (e.g. More...

Detailed Description

Abstract class representing a loadable resource (e.g.

textures, sounds etc)

Remarks: Resources are data objects that must be loaded and managed throughout an application. A resource might be a mesh, a texture, or any other piece of data - the key thing is that they must be identified by a name which is unique, must be loaded only once, must be managed efficiently in terms of retrieval, and they may also be unloadable to free memory up when they have not been used for a while and the memory budget is under stress.

: All Resource instances must be a member of a resource group; see ResourceGroupManager for full details.

Subclasses must implement:

A constructor, overriding the same parameters as the constructor defined by this class. Subclasses are not allowed to define constructors with other parameters; other settings must be settable through accessor methods before loading.
The loadImpl() and unloadImpl() methods - mSize must be set after loadImpl()
StringInterface ParamCommand and ParamDictionary setups in order to allow setting of core parameters (prior to load) through a generic interface.

Member Enumeration Documentation

◆ LoadingFlags

enum Ogre::Resource::LoadingFlags

Enum that allow to choose subset of unloaded/reloaded resources and to adjust reloading behavior.

Enumerator
LF_DEFAULT	Only reloadable resources are processed, reload restores initial state.
LF_INCLUDE_NON_RELOADABLE	Process non-reloadable resources too.
LF_ONLY_UNREFERENCED	Process only resources which are not referenced by any other object. Usefull to reduce resource consumption.
LF_ONLY_UNREFERENCED_INCLUDE_NON_RELOADABLE	Combination of LF_ONLY_UNREFERENCED and LF_INCLUDE_NON_RELOADABLE.
LF_PRESERVE_STATE	Preserve some states during reloading, for example stencil shadows prepareness for Meshes.
LF_MARKED_FOR_RELOAD	Resources are marked for reload on unloading, and only marked ones are processed on reloading.

◆ LoadingState

enum Ogre::Resource::LoadingState

Enum identifying the loading state of the resource.

Enumerator
LOADSTATE_UNLOADED	Not loaded.
LOADSTATE_LOADING	Loading is in progress.
LOADSTATE_LOADED	Fully loaded.
LOADSTATE_UNLOADING	Currently unloading.
LOADSTATE_PREPARED	Fully prepared.
LOADSTATE_PREPARING	Preparing is in progress.
LOADSTATE_UNLOADED_MARKED_FOR_RELOAD	Unloaded and marked for reload.

Constructor & Destructor Documentation

◆ Resource()

Ogre::Resource::Resource	(	ResourceManager *	creator,
		const String &	name,
		ResourceHandle	handle,
		const String &	group,
		bool	isManual = `false`,
		ManualResourceLoader *	loader = `0`
	)

Standard constructor.

Parameters

creator	Pointer to the ResourceManager that is creating this resource
name	The unique name of the resource
group	The name of the resource group to which this resource belongs
isManual	Is this resource manually loaded? If so, you should really populate the loader parameter in order that the load process can call the loader back when loading is required.
loader	Pointer to a ManualResourceLoader implementation which will be called when the Resource wishes to load (should be supplied if you set isManual to true). You can in fact leave this parameter null if you wish, but the Resource will never be able to reload if anything ever causes it to unload. Therefore provision of a proper ManualResourceLoader instance is strongly recommended.

◆ ~Resource()

virtual Ogre::Resource::~Resource ( )

virtual

Virtual destructor.

Shouldn't need to be overloaded, as the resource deallocation code should reside in unload()

See also: Resource::unload()

Member Function Documentation

◆ _dirtyState()

virtual void Ogre::Resource::_dirtyState ( )

virtual

Manually mark the state of this resource as having been changed.

Remarks: You only need to call this from outside if you explicitly want derived objects to think this object has changed.

See also: getStateCount.

◆ _fireLoadingComplete()

virtual void Ogre::Resource::_fireLoadingComplete ( bool wasBackgroundLoaded )

virtual

Firing of loading complete event.

Remarks: You should call this from the thread that runs the main frame loop to avoid having to make the receivers of this event thread-safe. If you use Ogre's built in frame loop you don't need to call this yourself.

Parameters

wasBackgroundLoaded Whether this was a background loaded event

◆ _firePreparingComplete()

virtual void Ogre::Resource::_firePreparingComplete ( bool wasBackgroundLoaded )

virtual

Firing of preparing complete event.

Remarks: You should call this from the thread that runs the main frame loop to avoid having to make the receivers of this event thread-safe. If you use Ogre's built in frame loop you don't need to call this yourself.

Parameters

wasBackgroundLoaded Whether this was a background loaded event

◆ _fireUnloadingComplete()

virtual void Ogre::Resource::_fireUnloadingComplete ( )

virtual

Firing of unloading complete event.

Remarks: You should call this from the thread that runs the main frame loop to avoid having to make the receivers of this event thread-safe. If you use Ogre's built in frame loop you don't need to call this yourself.

◆ _notifyOrigin()

virtual void Ogre::Resource::_notifyOrigin ( const String & origin )

inlinevirtual

Notify this resource of it's origin.

◆ addListener()

virtual void Ogre::Resource::addListener ( Listener * lis )

virtual

Register a listener on this resource.

See also: Resource::Listener

Reimplemented in Ogre::UnifiedHighLevelGpuProgram.

◆ calculateSize()

virtual size_t Ogre::Resource::calculateSize ( ) const

virtual

Calculate the size of a resource; this will only be called after 'load'.

Reimplemented in Ogre::GLSLShader, Ogre::UnifiedHighLevelGpuProgram, Ogre::HighLevelGpuProgram, and Ogre::GpuProgram.

◆ changeGroupOwnership()

virtual void Ogre::Resource::changeGroupOwnership ( const String & newGroup )

virtual

Change the resource group ownership of a Resource.

Remarks: This method is generally reserved for internal use, although if you really know what you're doing you can use it to move this resource from one group to another.

Parameters

newGroup Name of the new group

◆ escalateLoading()

virtual void Ogre::Resource::escalateLoading ( )

virtual

Escalates the loading of a background loaded resource.

Remarks: If a resource is set to load in the background, but something needs it before it's been loaded, there could be a problem. If the user of this resource really can't wait, they can escalate the loading which basically pulls the loading into the current thread immediately. If the resource is already being loaded but just hasn't quite finished then this method will simply wait until the background load is complete.

Reimplemented in Ogre::UnifiedHighLevelGpuProgram.

◆ getCreator()

virtual ResourceManager* Ogre::Resource::getCreator ( )

inlinevirtual

Gets the manager which created this resource.

◆ getGroup()

virtual const String& Ogre::Resource::getGroup ( ) const

inlinevirtual

Gets the group which this resource is a member of.

Reimplemented in Ogre::v1::OldSkeletonInstance.

◆ getHandle()

virtual ResourceHandle Ogre::Resource::getHandle ( ) const

inlinevirtual

Reimplemented in Ogre::v1::OldSkeletonInstance.

◆ getLoadingState()

virtual LoadingState Ogre::Resource::getLoadingState ( ) const

inlinevirtual

Returns the current loading state.

Reimplemented in Ogre::UnifiedHighLevelGpuProgram.

References Ogre::AtomicScalar< T >::get().

◆ getName()

virtual const String& Ogre::Resource::getName ( ) const

inlinevirtual

Gets resource name.

Reimplemented in Ogre::v1::OldSkeletonInstance.

Referenced by Ogre::GpuProgramUsage::getProgramName().

◆ getOrigin()

virtual const String& Ogre::Resource::getOrigin ( ) const

inlinevirtual

Get the origin of this resource, e.g.

a script file name.

Remarks: This property will only contain something if the creator of this resource chose to populate it. Script loaders are advised to populate it.

◆ getSize()

virtual size_t Ogre::Resource::getSize ( ) const

inlinevirtual

Retrieves info about the size of the resource.

Reimplemented in Ogre::UnifiedHighLevelGpuProgram.

◆ getStateCount()

virtual size_t Ogre::Resource::getStateCount ( ) const

inlinevirtual

Returns the number of times this resource has changed state, which generally means the number of times it has been loaded.

Objects that build derived data based on the resource can check this value against a copy they kept last time they built this derived data, in order to know whether it needs rebuilding. This is a nice way of monitoring changes without having a tightly-bound callback.

◆ isBackgroundLoaded()

virtual bool Ogre::Resource::isBackgroundLoaded ( ) const

inlinevirtual

Returns whether this Resource has been earmarked for background loading.

Remarks: This option only makes sense when you have built Ogre with thread support (OGRE_THREAD_SUPPORT). If a resource has been marked for background loading, then it won't load on demand like normal when load() is called. Instead, it will ignore request to load() except if the caller indicates it is the background loader. Any other users of this resource should check isLoaded(), and if that returns false, don't use the resource and come back later.

Reimplemented in Ogre::UnifiedHighLevelGpuProgram.

◆ isLoaded()

virtual bool Ogre::Resource::isLoaded ( ) const

inlinevirtual

Returns true if the Resource has been loaded, false otherwise.

Reimplemented in Ogre::UnifiedHighLevelGpuProgram.

References Ogre::AtomicScalar< T >::get().

◆ isLoading()

virtual bool Ogre::Resource::isLoading ( ) const

inlinevirtual

Returns whether the resource is currently in the process of background loading.

Reimplemented in Ogre::UnifiedHighLevelGpuProgram.

References Ogre::AtomicScalar< T >::get().

◆ isManuallyLoaded()

virtual bool Ogre::Resource::isManuallyLoaded ( ) const

inlinevirtual

Is this resource manually loaded?

◆ isPrepared()

virtual bool Ogre::Resource::isPrepared ( ) const

inlinevirtual

Returns true if the Resource has been prepared, false otherwise.

References Ogre::AtomicScalar< T >::get().

◆ isReloadable()

virtual bool Ogre::Resource::isReloadable ( ) const

inlinevirtual

Returns true if the Resource is reloadable, false otherwise.

Reimplemented in Ogre::UnifiedHighLevelGpuProgram.

◆ load()

virtual void Ogre::Resource::load ( bool backgroundThread = false )

virtual

Loads the resource, if it is not already.

Remarks: If the resource is loaded from a file, loading is automatic. If not, if for example this resource gained it's data from procedural calls rather than loading from a file, then this resource will not reload on it's own.

Parameters

backgroundThread Indicates whether the caller of this method is the background resource loading thread.

Reimplemented in Ogre::UnifiedHighLevelGpuProgram.

◆ markForReload()

bool Ogre::Resource::markForReload ( )

inline

References Ogre::AtomicScalar< T >::cas().

◆ prepare()

virtual void Ogre::Resource::prepare ( bool backgroundThread = false )

virtual

Prepares the resource for load, if it is not already.

One can call prepare() before load(), but this is not required as load() will call prepare() itself, if needed. When OGRE_THREAD_SUPPORT==1 both load() and prepare() are thread-safe. When OGRE_THREAD_SUPPORT==2 however, only prepare() is thread-safe. The reason for this function is to allow a background thread to do some of the loading work, without requiring the whole render system to be thread-safe. The background thread would call prepare() while the main render loop would later call load(). So long as prepare() remains thread-safe, subclasses can arbitrarily split the work of loading a resource between load() and prepare(). It is best to try and do as much work in prepare(), however, since this will leave less work for the main render thread to do and thus increase FPS.

Parameters

backgroundThread Whether this is occurring in a background thread

◆ reload()

virtual void Ogre::Resource::reload ( LoadingFlags flags = LF_DEFAULT )

virtual

Reloads the resource, if it is already loaded.

Remarks: Calls unload() and then load() again, if the resource is already loaded. If it is not loaded already, then nothing happens.

Reimplemented in Ogre::UnifiedHighLevelGpuProgram, and Ogre::v1::Mesh.

◆ removeListener()

virtual void Ogre::Resource::removeListener ( Listener * lis )

virtual

Remove a listener on this resource.

See also: Resource::Listener

Reimplemented in Ogre::UnifiedHighLevelGpuProgram.

◆ setBackgroundLoaded()

virtual void Ogre::Resource::setBackgroundLoaded ( bool bl )

inlinevirtual

Tells the resource whether it is background loaded or not.

Remarks

See also: Resource::isBackgroundLoaded . Note that calling this only defers the normal on-demand loading behaviour of a resource, it does not actually set up a thread to make sure the resource gets loaded in the background. You should use ResourceBackgroundLoadingQueue to manage the actual loading (which will call this method itself).

Reimplemented in Ogre::UnifiedHighLevelGpuProgram.

◆ setManuallyLoaded()

virtual void Ogre::Resource::setManuallyLoaded ( bool isManual )

inlinevirtual

Set "Is this resource manually loaded?".

◆ setToLoaded()

virtual void Ogre::Resource::setToLoaded ( )

inlinevirtual

Change the Resource loading state to loaded.

References Ogre::AtomicScalar< T >::set().

◆ touch()

virtual void Ogre::Resource::touch ( )

virtual

'Touches' the resource to indicate it has been used.

Reimplemented in Ogre::UnifiedHighLevelGpuProgram, and Ogre::Material.

Referenced by Ogre::Material::touch().

◆ unload()

virtual void Ogre::Resource::unload ( )

virtual

Unloads the resource; this is not permanent, the resource can be reloaded later if required.

Reimplemented in Ogre::UnifiedHighLevelGpuProgram.

Member Data Documentation

◆ OGRE_AUTO_MUTEX

Ogre::Resource::OGRE_AUTO_MUTEX

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

OgreResource.h

Classes

Public Types

Public Member Functions

Public Attributes

Additional Inherited Members

Detailed Description

Member Enumeration Documentation

◆ LoadingFlags

◆ LoadingState

Constructor & Destructor Documentation

◆ Resource()

◆ ~Resource()

Member Function Documentation

◆ _dirtyState()

◆ _fireLoadingComplete()

◆ _firePreparingComplete()

◆ _fireUnloadingComplete()

◆ _notifyOrigin()

◆ addListener()

◆ calculateSize()

◆ changeGroupOwnership()

◆ escalateLoading()

◆ getCreator()

◆ getGroup()

◆ getHandle()

◆ getLoadingState()

◆ getName()

◆ getOrigin()

◆ getSize()

◆ getStateCount()

◆ isBackgroundLoaded()

◆ isLoaded()

◆ isLoading()

◆ isManuallyLoaded()

◆ isPrepared()

◆ isReloadable()

◆ load()

◆ markForReload()

◆ prepare()

◆ reload()

◆ removeListener()

◆ setBackgroundLoaded()

◆ setManuallyLoaded()

◆ setToLoaded()

◆ touch()

◆ unload()

Member Data Documentation

◆ OGRE_AUTO_MUTEX