GL-specific implementation of a TextureManager. More...

#include <OgreGLTextureManager.h>

Inheritance diagram for Ogre::GLTextureManager:

Public Member Functions
	GLTextureManager (GLRenderSystem *renderSystem)

virtual	~GLTextureManager ()

PixelFormat	getNativeFormat (TextureType ttype, PixelFormat format, int usage)
	Gets the format which will be natively used for a requested format given the constraints of the current device. More...

bool	isHardwareFilteringSupported (TextureType ttype, PixelFormat format, int usage, bool preciseFormatOnly=false)
	Returns whether this render system has hardware filtering supported for the texture format requested with the given usage options. More...

Public Member Functions inherited from Ogre::TextureManager
	TextureManager (void)

virtual	~TextureManager ()

const TexturePtr &	_getWarningTexture ()
	Internal method to create a warning texture (bound when a texture unit is blank) More...

TexturePtr	create (const String &name, const String &group, bool isManual=false, ManualResourceLoader loader=0, const NameValuePairList createParams=0)
	Create a new texture. More...

TexturePtr	createManual (const String &name, const String &group, TextureType texType, uint width, uint height, int numMipmaps, PixelFormat format, int usage=TU_DEFAULT, ManualResourceLoader *loader=0, bool hwGammaCorrection=false, uint fsaa=0, const String &fsaaHint=BLANKSTRING)
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. More...

virtual TexturePtr	createManual (const String &name, const String &group, TextureType texType, uint width, uint height, uint depth, int numMipmaps, PixelFormat format, int usage=TU_DEFAULT, ManualResourceLoader *loader=0, bool hwGammaCorrection=false, uint fsaa=0, const String &fsaaHint=BLANKSTRING)
	Create a manual texture with specified width, height and depth (not loaded from a file). More...

ResourceCreateOrRetrieveResult	createOrRetrieve (const String &name, const String &group, bool isManual, ManualResourceLoader loader, const NameValuePairList createParams, TextureType texType, int numMipmaps=MIP_DEFAULT, Real gamma=1.0f, bool isAlpha=false, PixelFormat desiredFormat=PF_UNKNOWN, bool hwGammaCorrection=false)

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. More...

SamplerPtr	createSampler (const String &name=BLANKSTRING)
	create a new sampler More...

TexturePtr	getByName (const String &name, const String &groupName=RGN_DEFAULT)
	Retrieves a pointer to a resource by name, or null if the resource does not exist. More...

virtual uint32	getDefaultNumMipmaps ()
	Gets the default number of mipmaps to be used for loaded textures. More...

const SamplerPtr &	getDefaultSampler ()
	get the default sampler More...

virtual ushort	getPreferredFloatBitDepth (void) const
	Gets preferred bit depth for float pixel format textures. More...

virtual ushort	getPreferredIntegerBitDepth (void) const
	Gets preferred bit depth for integer pixel format textures. More...

const SamplerPtr &	getSampler (const String &name) const
	retrieve an named sampler More...

virtual bool	isEquivalentFormatSupported (TextureType ttype, PixelFormat format, int usage)
	Returns whether this render system can support the texture format requested with the given usage options, or another format with no quality reduction. More...

virtual bool	isFormatSupported (TextureType ttype, PixelFormat format, int usage)
	Returns whether this render system can natively support the precise texture format requested with the given usage options. More...

TexturePtr	load (const String &name, const String &group, TextureType texType, int numMipmaps, Real gamma, bool isAlpha, PixelFormat desiredFormat=PF_UNKNOWN, bool hwGammaCorrection=false)

TexturePtr	load (const String &name, const String &group, TextureType texType=TEX_TYPE_2D, int numMipmaps=MIP_DEFAULT, Real gamma=1.0f, PixelFormat desiredFormat=PF_UNKNOWN, bool hwGammaCorrection=false)
	Loads a texture from a file. More...

virtual TexturePtr	loadImage (const String &name, const String &group, const Image &img, TextureType texType=TEX_TYPE_2D, int numMipmaps=MIP_DEFAULT, Real gamma=1.0f, bool isAlpha=false, PixelFormat desiredFormat=PF_UNKNOWN, bool hwGammaCorrection=false)
	Loads a texture from an Image object. More...

virtual TexturePtr	loadRawData (const String &name, const String &group, DataStreamPtr &stream, ushort width, ushort height, PixelFormat format, TextureType texType=TEX_TYPE_2D, int numMipmaps=MIP_DEFAULT, Real gamma=1.0f, bool hwGammaCorrection=false)
	Loads a texture from a raw data stream. More...

TexturePtr	prepare (const String &name, const String &group, TextureType texType=TEX_TYPE_2D, int numMipmaps=MIP_DEFAULT, Real gamma=1.0f, bool isAlpha=false, PixelFormat desiredFormat=PF_UNKNOWN, bool hwGammaCorrection=false)
	Prepares to loads a texture from a file. More...

void	removeAllNamedSamplers ()
	clear the list of named samplers More...

virtual void	setDefaultNumMipmaps (uint32 num)
	Sets the default number of mipmaps to be used for loaded textures, for when textures are loaded automatically (e.g. More...

virtual void	setPreferredBitDepths (ushort integerBits, ushort floatBits, bool reloadTextures=true)
	Sets preferred bit depth for integer and float pixel format. More...

virtual void	setPreferredFloatBitDepth (ushort bits, bool reloadTextures=true)
	Sets preferred bit depth for float pixel format textures. More...

virtual void	setPreferredIntegerBitDepth (ushort bits, bool reloadTextures=true)
	Sets preferred bit depth for integer pixel format textures. More...

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

virtual	~ResourceManager ()

virtual void	_notifyResourceLoaded (Resource *res)
	Notify this manager that a resource which it manages has been loaded. More...

virtual void	_notifyResourceTouched (Resource *res)
	Notify this manager that a resource which it manages has been 'touched', i.e. More...

virtual void	_notifyResourceUnloaded (Resource *res)
	Notify this manager that a resource which it manages has been unloaded. More...

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. More...

ResourcePtr	createResource (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. More...

void	destroyAllResourcePools ()
	destroy all pools More...

void	destroyResourcePool (const String &name)
	Destroy a resource pool. More...

void	destroyResourcePool (ResourcePool *pool)
	Destroy a resource pool. More...

virtual ResourcePtr	getByHandle (ResourceHandle handle)
	Retrieves a pointer to a resource by handle, or null if the resource does not exist. More...

Real	getLoadingOrder (void) const
	Gets the relative loading order of resources of this type. More...

size_t	getMemoryBudget (void) const
	Get the limit on the amount of memory this resource handler may use. More...

size_t	getMemoryUsage (void) const
	Gets the current memory usage, in bytes. More...

virtual ResourcePtr	getResourceByName (const String &name, const String &groupName=RGN_DEFAULT)
	Retrieves a pointer to a resource by name, or null if the resource does not exist. More...

ResourceMapIterator	getResourceIterator (void)
	Returns an iterator over all resources in this manager. More...

ResourcePool *	getResourcePool (const String &name)
	Create a resource pool, or reuse one that already exists. More...

const String &	getResourceType (void) const
	Gets a string identifying the type of resource this manager handles. More...

const StringVector &	getScriptPatterns (void) const
	Gets the file patterns which should be used to find scripts for this ResourceManager. More...

bool	getVerbose (void)
	Gets whether this manager and its resources habitually produce log output. More...

ResourcePtr	load (const String &name, const String &group, bool isManual=false, ManualResourceLoader loader=0, const NameValuePairList loadParams=0, bool backgroundThread=false)
	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). More...

void	parseScript (DataStreamPtr &stream, const String &groupName)
	Parse the definition of a set of resources from a script file. More...

ResourcePtr	prepare (const String &name, const String &group, bool isManual=false, ManualResourceLoader loader=0, const NameValuePairList loadParams=0, bool backgroundThread=false)
	Generic prepare method, used to create a Resource specific to this ResourceManager without using one of the specialised 'prepare' methods (containing per-Resource-type parameters). More...

void	reloadAll (bool reloadableOnly=true)
	Caused all currently loaded resources to be reloaded. More...

virtual void	reloadAll (Resource::LoadingFlags flags)
	Caused all currently loaded resources to be reloaded. More...

void	reloadUnreferencedResources (bool reloadableOnly=true)
	Caused all currently loaded but not referenced by any other object resources to be reloaded. More...

void	remove (const ResourcePtr &r)
	Remove a single resource. More...

void	remove (const String &name, const String &group=RGN_DEFAULT)
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. More...

void	remove (ResourceHandle handle)
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. More...

virtual void	removeAll (void)
	Removes all resources. More...

virtual void	removeUnreferencedResources (bool reloadableOnly=true)
	Remove all resources which are not referenced by any other object. More...

bool	resourceExists (const String &name, const String &group=RGN_DEFAULT)
	Returns whether the named resource exists in this manager. More...

bool	resourceExists (ResourceHandle handle)
	Returns whether a resource with the given handle exists in this manager. More...

void	setMemoryBudget (size_t bytes)
	Set a limit on the amount of memory this resource handler may use. More...

void	setVerbose (bool v)
	Sets whether this manager and its resources habitually produce log output. More...

void	unload (const String &name, const String &group=RGN_DEFAULT)
	Unloads a single resource by name. More...

void	unload (ResourceHandle handle)
	Unloads a single resource by handle. More...

void	unloadAll (bool reloadableOnly=true)
	Unloads all resources. More...

virtual void	unloadAll (Resource::LoadingFlags flags)
	Unloads all resources. More...

void	unloadUnreferencedResources (bool reloadableOnly=true)
	Unload all resources which are not referenced by any other object. More...

Public Member Functions inherited from Ogre::ScriptLoader
virtual	~ScriptLoader ()

Public Member Functions inherited from Ogre::Singleton< TextureManager >
	Singleton (void)

	~Singleton (void)

Additional Inherited Members
Public Types inherited from Ogre::ResourceManager
typedef std::pair< ResourcePtr, bool >	ResourceCreateOrRetrieveResult

typedef std::map< ResourceHandle, ResourcePtr >	ResourceHandleMap

typedef std::unordered_map< String, ResourcePtr >	ResourceMap

typedef MapIterator< ResourceHandleMap >	ResourceMapIterator

typedef std::unordered_map< String, ResourceMap >	ResourceWithGroupMap

Static Public Member Functions inherited from Ogre::TextureManager
static TextureManager &	getSingleton (void)
	Get the singleton instance. More...

static TextureManager *	getSingletonPtr (void)
	Get the singleton instance. More...

Static Public Member Functions inherited from Ogre::Singleton< TextureManager >
static TextureManager &	getSingleton (void)
	Get the singleton instance. More...

static TextureManager *	getSingletonPtr (void)
	Get the singleton instance. More...

Detailed Description

GL-specific implementation of a TextureManager.

Constructor & Destructor Documentation

◆ GLTextureManager()

Ogre::GLTextureManager::GLTextureManager ( GLRenderSystem * renderSystem )

◆ ~GLTextureManager()

virtual Ogre::GLTextureManager::~GLTextureManager ( )

virtual

Member Function Documentation

◆ getNativeFormat()

PixelFormat Ogre::GLTextureManager::getNativeFormat	(	TextureType	ttype,
		PixelFormat	format,
		int	usage
	)

virtual

Gets the format which will be natively used for a requested format given the constraints of the current device.

Implements Ogre::TextureManager.

◆ isHardwareFilteringSupported()

bool Ogre::GLTextureManager::isHardwareFilteringSupported	(	TextureType	ttype,
		PixelFormat	format,
		int	usage,
		bool	preciseFormatOnly = `false`
	)

virtual

Returns whether this render system has hardware filtering supported for the texture format requested with the given usage options.

Remarks: Not all texture format are supports filtering by the hardware, i.e. some cards support floating point format, but it doesn't supports filtering on the floating point texture at all, or only a subset floating point formats have flitering supported.

: In the case you want to write shader to work with floating point texture, and you want to produce better visual quality, it's necessary to flitering the texture manually in shader (potential requires four or more texture fetch instructions, plus several arithmetic instructions) if filtering doesn't supported by hardware. But in case on the hardware that supports floating point filtering natively, it had better to adopt this capability for performance (because only one texture fetch instruction are required) and doesn't loss visual quality.

: This method allow you queries hardware texture filtering capability to deciding which verion of the shader to be used. Note it's up to you to write multi-version shaders for support various hardware, internal engine can't do that for you automatically.

Note: Under GL, texture filtering are always supported by driver, but if it's not supported by hardware natively, software simulation will be used, and you will end up with very slow speed (less than 0.1 fps for example). To slove this performance problem, you must disable filtering manually (by use filtering none in the material script's texture_unit section, or call TextureUnitState::setTextureFiltering with TFO_NONE if populate material in code).

Parameters

ttype	The texture type requested
format	The pixel format requested
usage	The kind of usage this texture is intended for, a combination of the TextureUsage flags.
preciseFormatOnly	Whether precise or fallback format mode is used to detecting. In case the pixel format doesn't supported by device, false will be returned if in precise mode, and natively used pixel format will be actually use to check if in fallback mode.

Returns: true if the texture filtering is supported.

Reimplemented from Ogre::TextureManager.

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

OgreGLTextureManager.h

Public Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ GLTextureManager()

◆ ~GLTextureManager()

Member Function Documentation

◆ getNativeFormat()

◆ isHardwareFilteringSupported()