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Ogre::FontManager Class Reference

Manages Font resources, parsing .fontdef files and generally organising them. More...

#include <OgreFontManager.h>

Inheritance diagram for Ogre::FontManager:

Inheritance graph
[legend]
List of all members.

Public Types

typedef std::pair< ResourcePtr,
bool > 
ResourceCreateOrRetrieveResult
typedef HashMap< String, ResourcePtrResourceMap
typedef std::map< ResourceHandle,
ResourcePtr
ResourceHandleMap
typedef MapIterator< ResourceHandleMapResourceMapIterator

Public Member Functions

 FontManager ()
 ~FontManager ()
void parseScript (DataStreamPtr &stream, const String &groupName)
 
Parameters:
stream Weak reference to a data stream which is the source of the script
groupName The name of a resource group which should be used if any resources are created during the parse of this script.

virtual ResourcePtr create (const String &name, const String &group, bool isManual=false, ManualResourceLoader *loader=0, const NameValuePairList *createParams=0)
 Creates a new blank resource, but does not immediately load it.
virtual ResourceCreateOrRetrieveResult createOrRetrieve (const String &name, const String &group, bool isManual=false, ManualResourceLoader *loader=0, const NameValuePairList *createParams=0)
 Create a new resource, or retrieve an existing one with the same name if it already exists.
virtual void setMemoryBudget (size_t bytes)
 Set a limit on the amount of memory this resource handler may use.
virtual size_t getMemoryBudget (void) const
 Get the limit on the amount of memory this resource handler may use.
virtual size_t getMemoryUsage (void) const
 Gets the current memory usage, in bytes.
virtual void unload (const String &name)
 Unloads a single resource by name.
virtual void unload (ResourceHandle handle)
 Unloads a single resource by handle.
virtual void unloadAll (bool reloadableOnly=true)
 Unloads all resources.
virtual void reloadAll (bool reloadableOnly=true)
 Caused all currently loaded resources to be reloaded.
virtual void unloadUnreferencedResources (bool reloadableOnly=true)
 Unload all resources which are not referenced by any other object.
virtual void reloadUnreferencedResources (bool reloadableOnly=true)
 Caused all currently loaded but not referenced by any other object resources to be reloaded.
virtual void remove (ResourcePtr &r)
 Remove a single resource.
virtual void remove (const String &name)
 Remove a single resource by name.
virtual void remove (ResourceHandle handle)
 Remove a single resource by handle.
virtual void removeAll (void)
 Removes all resources.
virtual ResourcePtr getByName (const String &name)
 Retrieves a pointer to a resource by name, or null if the resource does not exist.
virtual ResourcePtr getByHandle (ResourceHandle handle)
 Retrieves a pointer to a resource by handle, or null if the resource does not exist.
virtual bool resourceExists (const String &name)
 Returns whether the named resource exists in this manager.
virtual bool resourceExists (ResourceHandle handle)
 Returns whether a resource with the given handle exists in this manager.
virtual void _notifyResourceTouched (Resource *res)
 Notify this manager that a resource which it manages has been 'touched', ie used.
virtual void _notifyResourceLoaded (Resource *res)
 Notify this manager that a resource which it manages has been loaded.
virtual void _notifyResourceUnloaded (Resource *res)
 Notify this manager that a resource which it manages has been unloaded.
virtual ResourcePtr load (const String &name, const String &group, bool isManual=false, ManualResourceLoader *loader=0, const NameValuePairList *loadParams=0)
 Generic load method, used to create a Resource specific to this ResourceManager without using one of the specialised 'load' methods (containing per-Resource-type parameters).
virtual const StringVectorgetScriptPatterns (void) const
 Gets the file patterns which should be used to find scripts for this ResourceManager.
virtual Real getLoadingOrder (void) const
 Gets the relative loading order of resources of this type.
const StringgetResourceType (void) const
 Gets a string identifying the type of resource this manager handles.
ResourceMapIterator getResourceIterator (void)
 Returns an iterator over all resources in this manager.

Static Public Member Functions

static FontManagergetSingleton (void)
 Override standard Singleton retrieval.
static FontManagergetSingletonPtr (void)
 Override standard Singleton retrieval.

Protected Member Functions

ResourcecreateImpl (const String &name, ResourceHandle handle, const String &group, bool isManual, ManualResourceLoader *loader, const NameValuePairList *params)
 Internal methods.
void parseAttribute (const String &line, FontPtr &pFont)
void logBadAttrib (const String &line, FontPtr &pFont)
ResourceHandle getNextHandle (void)
 Allocates the next handle.
virtual void addImpl (ResourcePtr &res)
 Add a newly created resource to the manager (note weak reference).
virtual void removeImpl (ResourcePtr &res)
 Remove a resource from this manager; remove it from the lists.
virtual void checkUsage (void)
 Checks memory usage and pages out if required.

Protected Attributes

ResourceHandleMap mResourcesByHandle
ResourceMap mResources
ResourceHandle mNextHandle
size_t mMemoryBudget
size_t mMemoryUsage
StringVector mScriptPatterns
 Patterns to use to look for scripts if supported (e.g. *.overlay).
Real mLoadOrder
 Loading order relative to other managers, higher is later.
String mResourceType
 String identifying the resource type this manager handles.

Static Protected Attributes

static FontManagerms_Singleton

Detailed Description

Manages Font resources, parsing .fontdef files and generally organising them.

Definition at line 37 of file OgreFontManager.h.


Member Typedef Documentation

typedef std::pair<ResourcePtr, bool> Ogre::ResourceManager::ResourceCreateOrRetrieveResult [inherited]
 

Definition at line 98 of file OgreResourceManager.h.

typedef std::map<ResourceHandle, ResourcePtr> Ogre::ResourceManager::ResourceHandleMap [inherited]
 

Definition at line 412 of file OgreResourceManager.h.

typedef HashMap< String, ResourcePtr > Ogre::ResourceManager::ResourceMap [inherited]
 

Definition at line 411 of file OgreResourceManager.h.

typedef MapIterator<ResourceHandleMap> Ogre::ResourceManager::ResourceMapIterator [inherited]
 

Definition at line 430 of file OgreResourceManager.h.


Constructor & Destructor Documentation

Ogre::FontManager::FontManager  ) 
 

Ogre::FontManager::~FontManager  ) 
 


Member Function Documentation

virtual void Ogre::ResourceManager::_notifyResourceLoaded Resource res  )  [virtual, inherited]
 

Notify this manager that a resource which it manages has been loaded.

virtual void Ogre::ResourceManager::_notifyResourceTouched Resource res  )  [virtual, inherited]
 

Notify this manager that a resource which it manages has been 'touched', ie used.

virtual void Ogre::ResourceManager::_notifyResourceUnloaded Resource res  )  [virtual, inherited]
 

Notify this manager that a resource which it manages has been unloaded.

virtual void Ogre::ResourceManager::addImpl ResourcePtr res  )  [protected, virtual, inherited]
 

Add a newly created resource to the manager (note weak reference).

virtual void Ogre::ResourceManager::checkUsage void   )  [protected, virtual, inherited]
 

Checks memory usage and pages out if required.

virtual ResourcePtr Ogre::ResourceManager::create const String name,
const String group,
bool  isManual = false,
ManualResourceLoader loader = 0,
const NameValuePairList createParams = 0
[virtual, inherited]
 

Creates a new blank resource, but does not immediately load it.

Remarks:
Resource managers handle disparate types of resources, so if you want to get at the detailed interface of this resource, you'll have to cast the result to the subclass you know you're creating.
Parameters:
name The unique name of the resource
group The name of the resource group to attach this new resource to
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 ManualLoader 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 ManualLoader instance is strongly recommended.
createParams If any parameters are required to create an instance, they should be supplied here as name / value pairs

Resource* Ogre::FontManager::createImpl const String name,
ResourceHandle  handle,
const String group,
bool  isManual,
ManualResourceLoader loader,
const NameValuePairList params
[protected, virtual]
 

Internal methods.

Implements Ogre::ResourceManager.

virtual ResourceCreateOrRetrieveResult Ogre::ResourceManager::createOrRetrieve const String name,
const String group,
bool  isManual = false,
ManualResourceLoader loader = 0,
const NameValuePairList createParams = 0
[virtual, inherited]
 

Create a new resource, or retrieve an existing one with the same name if it already exists.

Remarks:
This method performs the same task as calling getByName() followed by create() if that returns null. The advantage is that it does it in one call so there are no race conditions if using multiple threads that could cause getByName() to return null, but create() to fail because another thread created a resource in between.
See also:
ResourceManager::create

ResourceManager::getByName

Returns:
A pair, the first element being the pointer, and the second being an indicator specifying whether the resource was newly created.

virtual ResourcePtr Ogre::ResourceManager::getByHandle ResourceHandle  handle  )  [virtual, inherited]
 

Retrieves a pointer to a resource by handle, or null if the resource does not exist.

virtual ResourcePtr Ogre::ResourceManager::getByName const String name  )  [virtual, inherited]
 

Retrieves a pointer to a resource by name, or null if the resource does not exist.

virtual Real Ogre::ResourceManager::getLoadingOrder void   )  const [virtual, inherited]
 

Gets the relative loading order of resources of this type.

Remarks:
There are dependencies between some kinds of resource in terms of loading order, and this value enumerates that. Higher values load later during bulk loading tasks.

Implements Ogre::ScriptLoader.

Definition at line 367 of file OgreResourceManager.h.

virtual size_t Ogre::ResourceManager::getMemoryBudget void   )  const [virtual, inherited]
 

Get the limit on the amount of memory this resource handler may use.

virtual size_t Ogre::ResourceManager::getMemoryUsage void   )  const [virtual, inherited]
 

Gets the current memory usage, in bytes.

Definition at line 131 of file OgreResourceManager.h.

ResourceHandle Ogre::ResourceManager::getNextHandle void   )  [protected, inherited]
 

Allocates the next handle.

ResourceMapIterator Ogre::ResourceManager::getResourceIterator void   )  [inherited]
 

Returns an iterator over all resources in this manager.

Note:
Use of this iterator is NOT thread safe!

Definition at line 435 of file OgreResourceManager.h.

const String& Ogre::ResourceManager::getResourceType void   )  const [inherited]
 

Gets a string identifying the type of resource this manager handles.

Definition at line 370 of file OgreResourceManager.h.

virtual const StringVector& Ogre::ResourceManager::getScriptPatterns void   )  const [virtual, inherited]
 

Gets the file patterns which should be used to find scripts for this ResourceManager.

Remarks:
Some resource managers can read script files in order to define resources ahead of time. These resources are added to the available list inside the manager, but none are loaded initially. This allows you to load the items that are used on demand, or to load them all as a group if you wish (through ResourceGroupManager).
This method lets you determine the file pattern which will be used to identify scripts intended for this manager.
Returns:
A list of file patterns, in the order they should be searched in.
See also:
isScriptingSupported, parseScript

Implements Ogre::ScriptLoader.

Definition at line 344 of file OgreResourceManager.h.

static FontManager& Ogre::FontManager::getSingleton void   )  [static]
 

Override standard Singleton retrieval.

Remarks:
Why do we do this? Well, it's because the Singleton implementation is in a .h file, which means it gets compiled into anybody who includes it. This is needed for the Singleton template to work, but we actually only want it compiled into the implementation of the class based on the Singleton, not all of them. If we don't change this, we get link errors when trying to use the Singleton-based class from an outside dll.
This method just delegates to the template version anyway, but the implementation stays in this single compilation unit, preventing link errors.

Reimplemented from Ogre::Singleton< FontManager >.

static FontManager* Ogre::FontManager::getSingletonPtr void   )  [static]
 

Override standard Singleton retrieval.

Remarks:
Why do we do this? Well, it's because the Singleton implementation is in a .h file, which means it gets compiled into anybody who includes it. This is needed for the Singleton template to work, but we actually only want it compiled into the implementation of the class based on the Singleton, not all of them. If we don't change this, we get link errors when trying to use the Singleton-based class from an outside dll.
This method just delegates to the template version anyway, but the implementation stays in this single compilation unit, preventing link errors.

Reimplemented from Ogre::Singleton< FontManager >.

virtual ResourcePtr Ogre::ResourceManager::load const String name,
const String group,
bool  isManual = false,
ManualResourceLoader loader = 0,
const NameValuePairList loadParams = 0
[virtual, inherited]
 

Generic load method, used to create a Resource specific to this ResourceManager without using one of the specialised 'load' methods (containing per-Resource-type parameters).

Parameters:
name The name of the Resource
group The resource group to which this resource will belong
isManual Is the resource to be manually loaded? If so, you should provide a value for the loader parameter
loader The manual loader which is to perform the required actions when this resource is loaded; only applicable when you specify true for the previous parameter
loadParams Optional pointer to a list of name/value pairs containing loading parameters for this type of resource.

void Ogre::FontManager::logBadAttrib const String line,
FontPtr pFont
[protected]
 

void Ogre::FontManager::parseAttribute const String line,
FontPtr pFont
[protected]
 

void Ogre::FontManager::parseScript DataStreamPtr stream,
const String groupName
[virtual]
 

Parameters:
stream Weak reference to a data stream which is the source of the script
groupName The name of a resource group which should be used if any resources are created during the parse of this script.

Reimplemented from Ogre::ResourceManager.

virtual void Ogre::ResourceManager::reloadAll bool  reloadableOnly = true  )  [virtual, inherited]
 

Caused all currently loaded resources to be reloaded.

Remarks:
All resources currently being held in this manager which are also marked as currently loaded will be unloaded, then loaded again.
Parameters:
reloadableOnly If true (the default), only reload the resource that is reloadable. Because some resources isn't reloadable, they will be unloaded but can't loaded again. Thus, you might not want to them unloaded. Or, you might unload all of them, and then populate them manually later.
See also:
Resource::isReloadable for resource is reloadable.

virtual void Ogre::ResourceManager::reloadUnreferencedResources bool  reloadableOnly = true  )  [virtual, inherited]
 

Caused all currently loaded but not referenced by any other object resources to be reloaded.

Remarks:
This method behaves like reloadAll, except that it only reloads resources which are not in use, ie not referenced by other objects.
Some referenced resource may exists 'weak' pointer to their sub-components (e.g. Entity held pointer to SubMesh), in this case, unload or reload that resource will cause dangerous pointer access. Use this function instead of reloadAll allows you avoid fail in those situations.
Parameters:
reloadableOnly If true (the default), only reloads resources which can be subsequently automatically reloaded.

virtual void Ogre::ResourceManager::remove ResourceHandle  handle  )  [virtual, inherited]
 

Remove a single resource by handle.

Remarks:
Removes a single resource, meaning it will be removed from the list of valid resources in this manager, also causing it to be unloaded.
Note:
The word 'Destroy' is not used here, since if any other pointers are referring to this resource, it will persist until they have finished with it; however to all intents and purposes it no longer exists and will likely get destroyed imminently.

If you do have shared pointers to resources hanging around after the ResourceManager is destroyed, you may get problems on destruction of these resources if they were relying on the manager (especially if it is a plugin). If you find you get problems on shutdown in the destruction of resources, try making sure you release all your shared pointers before you shutdown OGRE.

virtual void Ogre::ResourceManager::remove const String name  )  [virtual, inherited]
 

Remove a single resource by name.

Remarks:
Removes a single resource, meaning it will be removed from the list of valid resources in this manager, also causing it to be unloaded.
Note:
The word 'Destroy' is not used here, since if any other pointers are referring to this resource, it will persist until they have finished with it; however to all intents and purposes it no longer exists and will likely get destroyed imminently.

If you do have shared pointers to resources hanging around after the ResourceManager is destroyed, you may get problems on destruction of these resources if they were relying on the manager (especially if it is a plugin). If you find you get problems on shutdown in the destruction of resources, try making sure you release all your shared pointers before you shutdown OGRE.

virtual void Ogre::ResourceManager::remove ResourcePtr r  )  [virtual, inherited]
 

Remove a single resource.

Remarks:
Removes a single resource, meaning it will be removed from the list of valid resources in this manager, also causing it to be unloaded.
Note:
The word 'Destroy' is not used here, since if any other pointers are referring to this resource, it will persist until they have finished with it; however to all intents and purposes it no longer exists and will likely get destroyed imminently.

If you do have shared pointers to resources hanging around after the ResourceManager is destroyed, you may get problems on destruction of these resources if they were relying on the manager (especially if it is a plugin). If you find you get problems on shutdown in the destruction of resources, try making sure you release all your shared pointers before you shutdown OGRE.

virtual void Ogre::ResourceManager::removeAll void   )  [virtual, inherited]
 

Removes all resources.

Note:
The word 'Destroy' is not used here, since if any other pointers are referring to these resources, they will persist until they have been finished with; however to all intents and purposes the resources no longer exist and will get destroyed imminently.

If you do have shared pointers to resources hanging around after the ResourceManager is destroyed, you may get problems on destruction of these resources if they were relying on the manager (especially if it is a plugin). If you find you get problems on shutdown in the destruction of resources, try making sure you release all your shared pointers before you shutdown OGRE.

Reimplemented in Ogre::CompositorManager.

virtual void Ogre::ResourceManager::removeImpl ResourcePtr res  )  [protected, virtual, inherited]
 

Remove a resource from this manager; remove it from the lists.

virtual bool Ogre::ResourceManager::resourceExists ResourceHandle  handle  )  [virtual, inherited]
 

Returns whether a resource with the given handle exists in this manager.

Definition at line 292 of file OgreResourceManager.h.

virtual bool Ogre::ResourceManager::resourceExists const String name  )  [virtual, inherited]
 

Returns whether the named resource exists in this manager.

Definition at line 287 of file OgreResourceManager.h.

virtual void Ogre::ResourceManager::setMemoryBudget size_t  bytes  )  [virtual, inherited]
 

Set a limit on the amount of memory this resource handler may use.

Remarks:
If, when asked to load a new resource, the manager believes it will exceed this memory budget, it will temporarily unload a resource to make room for the new one. This unloading is not permanent and the Resource is not destroyed; it simply needs to be reloaded when next used.

virtual void Ogre::ResourceManager::unload ResourceHandle  handle  )  [virtual, inherited]
 

Unloads a single resource by handle.

Remarks:
Unloaded resources are not removed, they simply free up their memory as much as they can and wait to be reloaded.
See also:
ResourceGroupManager for unloading of resource groups.

virtual void Ogre::ResourceManager::unload const String name  )  [virtual, inherited]
 

Unloads a single resource by name.

Remarks:
Unloaded resources are not removed, they simply free up their memory as much as they can and wait to be reloaded.
See also:
ResourceGroupManager for unloading of resource groups.

virtual void Ogre::ResourceManager::unloadAll bool  reloadableOnly = true  )  [virtual, inherited]
 

Unloads all resources.

Remarks:
Unloaded resources are not removed, they simply free up their memory as much as they can and wait to be reloaded.
See also:
ResourceGroupManager for unloading of resource groups.
Parameters:
reloadableOnly If true (the default), only unload the resource that is reloadable. Because some resources isn't reloadable, they will be unloaded but can't load them later. Thus, you might not want to them unloaded. Or, you might unload all of them, and then populate them manually later.
See also:
Resource::isReloadable for resource is reloadable.

virtual void Ogre::ResourceManager::unloadUnreferencedResources bool  reloadableOnly = true  )  [virtual, inherited]
 

Unload all resources which are not referenced by any other object.

Remarks:
This method behaves like unloadAll, except that it only unloads resources which are not in use, ie not referenced by other objects. This allows you to free up some memory selectively whilst still keeping the group around (and the resources present, just not using much memory).
Some referenced resource may exists 'weak' pointer to their sub-components (e.g. Entity held pointer to SubMesh), in this case, unload or reload that resource will cause dangerous pointer access. Use this function instead of unloadAll allows you avoid fail in those situations.
Parameters:
reloadableOnly If true (the default), only unloads resources which can be subsequently automatically reloaded.


Member Data Documentation

Real Ogre::ResourceManager::mLoadOrder [protected, inherited]
 

Loading order relative to other managers, higher is later.

Definition at line 425 of file OgreResourceManager.h.

size_t Ogre::ResourceManager::mMemoryBudget [protected, inherited]
 

Definition at line 417 of file OgreResourceManager.h.

size_t Ogre::ResourceManager::mMemoryUsage [protected, inherited]
 

Definition at line 418 of file OgreResourceManager.h.

ResourceHandle Ogre::ResourceManager::mNextHandle [protected, inherited]
 

Definition at line 416 of file OgreResourceManager.h.

ResourceMap Ogre::ResourceManager::mResources [protected, inherited]
 

Definition at line 415 of file OgreResourceManager.h.

ResourceHandleMap Ogre::ResourceManager::mResourcesByHandle [protected, inherited]
 

Definition at line 414 of file OgreResourceManager.h.

String Ogre::ResourceManager::mResourceType [protected, inherited]
 

String identifying the resource type this manager handles.

Definition at line 427 of file OgreResourceManager.h.

FontManager * Ogre::Singleton< FontManager >::ms_Singleton [static, protected, inherited]
 

Definition at line 61 of file OgreSingleton.h.

StringVector Ogre::ResourceManager::mScriptPatterns [protected, inherited]
 

Patterns to use to look for scripts if supported (e.g. *.overlay).

Definition at line 423 of file OgreResourceManager.h.


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

Copyright © 2000-2005 by The OGRE Team
Creative Commons License
This work is licensed under a Creative Commons Attribution-ShareAlike 2.5 License.
Last modified Sun Sep 30 10:51:16 2007