OGRE  1.12.9
Object-Oriented Graphics Rendering Engine
Ogre::Texture Class Referenceabstract

Abstract class representing a Texture resource. More...

#include <OgreTexture.h>

+ Inheritance diagram for Ogre::Texture:

Public Member Functions

 Texture (ResourceManager *creator, const String &name, ResourceHandle handle, const String &group, bool isManual=false, ManualResourceLoader *loader=0)
 
virtual ~Texture ()
 
void _loadImages (const ConstImagePtrList &images)
 Internal method to load the texture from a set of images. More...
 
void convertToImage (Image &destImage, bool includeMipMaps=false)
 Populate an Image with the contents of this texture. More...
 
virtual void copyToTexture (TexturePtr &target)
 Copies (and maybe scales to fit) the contents of this texture to another texture. More...
 
void createInternalResources (void)
 Creates the internal texture resources for this texture. More...
 
virtual void createShaderAccessPoint (uint bindPoint, TextureAccess access=TA_READ_WRITE, int mipmapLevel=0, int textureArrayIndex=0, PixelFormat format=PF_UNKNOWN)
 Enable read and/or write privileges to the texture from shaders. More...
 
void freeInternalResources (void)
 Frees internal texture resources for this texture. More...
 
virtual const HardwarePixelBufferSharedPtrgetBuffer (size_t face=0, size_t mipmap=0)
 Return hardware pixel buffer for a surface. More...
 
uint getCustomAttribute (const String &name)
 simplified API for bindings More...
 
virtual void getCustomAttribute (const String &name, void *pData)
 Retrieve a platform or API-specific piece of information from this texture. More...
 
uint32 getDepth (void) const
 Returns the depth of the texture (only applicable for 3D textures). More...
 
ushort getDesiredFloatBitDepth (void) const
 gets desired bit depth for float pixel format textures. More...
 
PixelFormat getDesiredFormat (void) const
 Returns the desired pixel format for the texture surface. More...
 
ushort getDesiredIntegerBitDepth (void) const
 gets desired bit depth for integer pixel format textures. More...
 
PixelFormat getFormat () const
 Returns the pixel format for the texture surface. More...
 
uint getFSAA () const
 Get the level of multisample AA to be used if this texture is a rendertarget. More...
 
const StringgetFSAAHint () const
 Get the multisample AA hint if this texture is a rendertarget. More...
 
float getGamma (void) const
 Returns the gamma adjustment factor applied to this texture on loading. More...
 
uint32 getHeight (void) const
 Returns the height of the texture. More...
 
bool getMipmapsHardwareGenerated (void) const
 Are mipmaps hardware generated? More...
 
size_t getNumFaces () const
 Return the number of faces this texture has. More...
 
uint32 getNumMipmaps (void) const
 Gets the number of mipmaps to be used for this texture. More...
 
uint32 getSrcDepth (void) const
 Returns the original depth of the input texture (only applicable for 3D textures). More...
 
PixelFormat getSrcFormat (void) const
 Returns the pixel format of the original input texture (may differ due to hardware requirements and pixel format conversion). More...
 
uint32 getSrcHeight (void) const
 Returns the height of the original input texture (may differ due to hardware requirements). More...
 
uint32 getSrcWidth (void) const
 Returns the width of the original input texture (may differ due to hardware requirements). More...
 
TextureType getTextureType (void) const
 Gets the type of texture. More...
 
bool getTreatLuminanceAsAlpha (void) const
 
int getUsage () const
 Returns the TextureUsage identifier for this Texture. More...
 
uint32 getWidth (void) const
 Returns the width of the texture. More...
 
bool hasAlpha (void) const
 Returns true if the texture has an alpha layer. More...
 
bool isHardwareGammaEnabled () const
 Gets whether this texture will be set up so that on sampling it, hardware gamma correction is applied. More...
 
void loadImage (const Image &img)
 Loads the data from an image. More...
 
void loadRawData (DataStreamPtr &stream, ushort uWidth, ushort uHeight, PixelFormat eFormat)
 Loads the data from a raw stream. More...
 
void setDepth (uint32 d)
 Set the depth of the texture (only applicable for 3D textures); can only do this before load();. More...
 
void setDesiredBitDepths (ushort integerBits, ushort floatBits)
 Sets desired bit depth for integer and float pixel format. More...
 
void setDesiredFloatBitDepth (ushort bits)
 Sets desired bit depth for float pixel format textures. More...
 
void setDesiredIntegerBitDepth (ushort bits)
 Sets desired bit depth for integer pixel format textures. More...
 
void setFormat (PixelFormat pf)
 Sets the desired pixel format for the texture surface; can only be set before load(). More...
 
void setFSAA (uint fsaa, const String &fsaaHint)
 Set the level of multisample AA to be used if this texture is a rendertarget. More...
 
void setGamma (float g)
 Sets the gamma adjustment factor applied to this texture on loading the data. More...
 
void setHardwareGammaEnabled (bool enabled)
 Sets whether this texture will be set up so that on sampling it, hardware gamma correction is applied. More...
 
void setHeight (uint32 h)
 Set the height of the texture; can only do this before load();. More...
 
void setLayerNames (const std::vector< String > &names)
 Set image names to be loaded as layers (3d & texture array) or cubemap faces. More...
 
void setNumMipmaps (uint32 num)
 Sets the number of mipmaps to be used for this texture. More...
 
void setTextureType (TextureType ttype)
 Sets the type of texture; can only be changed before load() More...
 
void setTreatLuminanceAsAlpha (bool asAlpha)
 
void setUsage (int u)
 Sets the TextureUsage identifier for this Texture; only useful before load() More...
 
void setWidth (uint32 w)
 Set the width of the texture; can only do this before load();. More...
 
- Public Member Functions inherited from Ogre::Resource
 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...
 
void _fireLoadingComplete (bool wasBackgroundLoaded)
 Firing of loading complete event. More...
 
void _firePreparingComplete (bool wasBackgroundLoaded)
 Firing of preparing complete event. More...
 
void _fireUnloadingComplete (void)
 Firing of unloading complete event. More...
 
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 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...
 
ResourceManagergetCreator (void)
 Gets the manager which created this resource. More...
 
const StringgetGroup (void) const
 Gets the group which this resource is a member of. More...
 
ResourceHandle getHandle (void) const
 
LoadingState getLoadingState () const
 Returns the current loading state. More...
 
const StringgetName (void) const
 Gets resource name. More...
 
const StringgetOrigin (void) const
 Get the origin of this resource, e.g. More...
 
size_t getSize (void) 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...
 
bool isBackgroundLoaded (void) const
 Returns whether this Resource has been earmarked for background loading. More...
 
bool isLoaded (void) const
 Returns true if the Resource has been loaded, false otherwise. More...
 
bool isLoading () const
 Returns whether the resource is currently in the process of background loading. More...
 
bool isManuallyLoaded (void) const
 Is this resource manually loaded? More...
 
bool isPrepared (void) const
 Returns true if the Resource has been prepared, false otherwise. More...
 
bool isReloadable (void) 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...
 
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...
 
void setBackgroundLoaded (bool bl)
 Tells the resource whether it is background loaded or not. More...
 
virtual void touch (void)
 'Touches' the resource to indicate it has been used. More...
 
virtual void unload (void)
 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...
 
void copyParametersTo (StringInterface *dest) const
 Method for copying this object's parameters to another object. More...
 
ParamDictionarygetParamDictionary (void)
 Retrieves the parameter dictionary for this class. More...
 
const ParamDictionarygetParamDictionary (void) const
 
String getParameter (const String &name) const
 Generic parameter retrieval method. More...
 
const ParameterListgetParameters (void) const
 Retrieves a list of parameters valid for this object. More...
 
bool setParameter (const String &name, const String &value)
 Generic parameter setting method. More...
 
void setParameterList (const NameValuePairList &paramList)
 Generic multiple parameter setting method. More...
 

Additional Inherited Members

- Public Types inherited from Ogre::Resource
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
}
 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
}
 Enum identifying the loading state of the resource. More...
 
- 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 Texture resource.

Remarks
The actual concrete subclass which will exist for a texture is dependent on the rendering system in use (Direct3D, OpenGL etc). This class represents the commonalities, and is the one 'used' by programmers even though the real implementation could be different in reality. Texture objects are created through the 'create' method of the TextureManager concrete subclass.

Constructor & Destructor Documentation

◆ Texture()

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

◆ ~Texture()

virtual Ogre::Texture::~Texture ( )
inlinevirtual

Member Function Documentation

◆ setTextureType()

void Ogre::Texture::setTextureType ( TextureType  ttype)
inline

Sets the type of texture; can only be changed before load()

◆ getTextureType()

TextureType Ogre::Texture::getTextureType ( void  ) const
inline

Gets the type of texture.

◆ getNumMipmaps()

uint32 Ogre::Texture::getNumMipmaps ( void  ) const
inline

Gets the number of mipmaps to be used for this texture.

◆ setNumMipmaps()

void Ogre::Texture::setNumMipmaps ( uint32  num)
inline

Sets the number of mipmaps to be used for this texture.

Note
Must be set before calling any 'load' method.

References Ogre::TU_AUTOMIPMAP.

◆ getMipmapsHardwareGenerated()

bool Ogre::Texture::getMipmapsHardwareGenerated ( void  ) const
inline

Are mipmaps hardware generated?

Remarks
Will only be accurate after texture load, or createInternalResources

◆ getGamma()

float Ogre::Texture::getGamma ( void  ) const
inline

Returns the gamma adjustment factor applied to this texture on loading.

◆ setGamma()

void Ogre::Texture::setGamma ( float  g)
inline

Sets the gamma adjustment factor applied to this texture on loading the data.

Note
Must be called before any 'load' method. This gamma factor will be premultiplied in and may reduce the precision of your textures. You can use setHardwareGamma if supported to apply gamma on sampling the texture instead.

◆ setHardwareGammaEnabled()

void Ogre::Texture::setHardwareGammaEnabled ( bool  enabled)
inline

Sets whether this texture will be set up so that on sampling it, hardware gamma correction is applied.

Remarks
24-bit textures are often saved in gamma colour space; this preserves precision in the 'darks'. However, if you're performing blending on the sampled colours, you really want to be doing it in linear space. One way is to apply a gamma correction value on loading (see setGamma), but this means you lose precision in those dark colours. An alternative is to get the hardware to do the gamma correction when reading the texture and converting it to a floating point value for the rest of the pipeline. This option allows you to do that; it's only supported in relatively recent hardware (others will ignore it) but can improve the quality of colour reproduction.
Note
Must be called before any 'load' method since it may affect the construction of the underlying hardware resources. Also note this only useful on textures using 8-bit colour channels.

◆ isHardwareGammaEnabled()

bool Ogre::Texture::isHardwareGammaEnabled ( ) const
inline

Gets whether this texture will be set up so that on sampling it, hardware gamma correction is applied.

◆ setFSAA()

void Ogre::Texture::setFSAA ( uint  fsaa,
const String fsaaHint 
)
inline

Set the level of multisample AA to be used if this texture is a rendertarget.

Note
This option will be ignored if TU_RENDERTARGET is not part of the usage options on this texture, or if the hardware does not support it.
Parameters
fsaaThe number of samples
fsaaHintAny hinting text (see Root::createRenderWindow)

◆ getFSAA()

uint Ogre::Texture::getFSAA ( ) const
inline

Get the level of multisample AA to be used if this texture is a rendertarget.

◆ getFSAAHint()

const String& Ogre::Texture::getFSAAHint ( ) const
inline

Get the multisample AA hint if this texture is a rendertarget.

◆ getHeight()

uint32 Ogre::Texture::getHeight ( void  ) const
inline

Returns the height of the texture.

◆ getWidth()

uint32 Ogre::Texture::getWidth ( void  ) const
inline

Returns the width of the texture.

◆ getDepth()

uint32 Ogre::Texture::getDepth ( void  ) const
inline

Returns the depth of the texture (only applicable for 3D textures).

◆ getSrcHeight()

uint32 Ogre::Texture::getSrcHeight ( void  ) const
inline

Returns the height of the original input texture (may differ due to hardware requirements).

◆ getSrcWidth()

uint32 Ogre::Texture::getSrcWidth ( void  ) const
inline

Returns the width of the original input texture (may differ due to hardware requirements).

◆ getSrcDepth()

uint32 Ogre::Texture::getSrcDepth ( void  ) const
inline

Returns the original depth of the input texture (only applicable for 3D textures).

◆ setHeight()

void Ogre::Texture::setHeight ( uint32  h)
inline

Set the height of the texture; can only do this before load();.

◆ setWidth()

void Ogre::Texture::setWidth ( uint32  w)
inline

Set the width of the texture; can only do this before load();.

◆ setDepth()

void Ogre::Texture::setDepth ( uint32  d)
inline

Set the depth of the texture (only applicable for 3D textures); can only do this before load();.

◆ getUsage()

int Ogre::Texture::getUsage ( ) const
inline

Returns the TextureUsage identifier for this Texture.

◆ setUsage()

void Ogre::Texture::setUsage ( int  u)
inline

Sets the TextureUsage identifier for this Texture; only useful before load()

Parameters
uis a combination of TU_STATIC, TU_DYNAMIC, TU_WRITE_ONLY TU_AUTOMIPMAP and TU_RENDERTARGET (see TextureUsage enum). You are strongly advised to use HBU_STATIC_WRITE_ONLY wherever possible, if you need to update regularly, consider HBU_DYNAMIC_WRITE_ONLY.

◆ createInternalResources()

void Ogre::Texture::createInternalResources ( void  )

Creates the internal texture resources for this texture.

Remarks
This method creates the internal texture resources (pixel buffers, texture surfaces etc) required to begin using this texture. You do not need to call this method directly unless you are manually creating a texture, in which case something must call it, after having set the size and format of the texture (e.g. the ManualResourceLoader might be the best one to call it). If you are not defining a manual texture, or if you use one of the self-contained load...() methods, then it will be called for you.

◆ freeInternalResources()

void Ogre::Texture::freeInternalResources ( void  )

Frees internal texture resources for this texture.

◆ copyToTexture()

virtual void Ogre::Texture::copyToTexture ( TexturePtr target)
virtual

Copies (and maybe scales to fit) the contents of this texture to another texture.

Reimplemented in Ogre::D3D9Texture, and Ogre::D3D11Texture.

◆ loadImage()

void Ogre::Texture::loadImage ( const Image img)

Loads the data from an image.

Attention
only call this from outside the load() routine of a Resource. Don't call it within (including ManualResourceLoader) - use _loadImages() instead. This method is designed to be external, performs locking and checks the load status before loading.

◆ loadRawData()

void Ogre::Texture::loadRawData ( DataStreamPtr stream,
ushort  uWidth,
ushort  uHeight,
PixelFormat  eFormat 
)

Loads the data from a raw stream.

Attention
only call this from outside the load() routine of a Resource. Don't call it within (including ManualResourceLoader) - use _loadImages() instead. This method is designed to be external, performs locking and checks the load status before loading.
Parameters
streamData stream containing the raw pixel data
uWidthWidth of the image
uHeightHeight of the image
eFormatThe format of the pixel data

◆ _loadImages()

void Ogre::Texture::_loadImages ( const ConstImagePtrList images)

Internal method to load the texture from a set of images.

Attention
Do NOT call this method unless you are inside the load() routine already, e.g. a ManualResourceLoader. It is not threadsafe and does not check or update resource loading status.

◆ getFormat()

PixelFormat Ogre::Texture::getFormat ( ) const
inline

Returns the pixel format for the texture surface.

◆ getDesiredFormat()

PixelFormat Ogre::Texture::getDesiredFormat ( void  ) const
inline

Returns the desired pixel format for the texture surface.

◆ getSrcFormat()

PixelFormat Ogre::Texture::getSrcFormat ( void  ) const
inline

Returns the pixel format of the original input texture (may differ due to hardware requirements and pixel format conversion).

◆ setFormat()

void Ogre::Texture::setFormat ( PixelFormat  pf)

Sets the desired pixel format for the texture surface; can only be set before load().

◆ hasAlpha()

bool Ogre::Texture::hasAlpha ( void  ) const

Returns true if the texture has an alpha layer.

◆ setDesiredIntegerBitDepth()

void Ogre::Texture::setDesiredIntegerBitDepth ( ushort  bits)

Sets desired bit depth for integer pixel format textures.

Available values: 0, 16 and 32, where 0 (the default) means keep original format as it is. This value is number of bits for the pixel.

◆ getDesiredIntegerBitDepth()

ushort Ogre::Texture::getDesiredIntegerBitDepth ( void  ) const

gets desired bit depth for integer pixel format textures.

◆ setDesiredFloatBitDepth()

void Ogre::Texture::setDesiredFloatBitDepth ( ushort  bits)

Sets desired bit depth for float pixel format textures.

Available values: 0, 16 and 32, where 0 (the default) means keep original format as it is. This value is number of bits for a channel of the pixel.

◆ getDesiredFloatBitDepth()

ushort Ogre::Texture::getDesiredFloatBitDepth ( void  ) const

gets desired bit depth for float pixel format textures.

◆ setDesiredBitDepths()

void Ogre::Texture::setDesiredBitDepths ( ushort  integerBits,
ushort  floatBits 
)

Sets desired bit depth for integer and float pixel format.

◆ setTreatLuminanceAsAlpha()

void Ogre::Texture::setTreatLuminanceAsAlpha ( bool  asAlpha)
Deprecated:
use setFormat(PF_A8)

◆ getTreatLuminanceAsAlpha()

bool Ogre::Texture::getTreatLuminanceAsAlpha ( void  ) const
Deprecated:
do not use

◆ getNumFaces()

size_t Ogre::Texture::getNumFaces ( ) const

Return the number of faces this texture has.

This will be 6 for a cubemap texture and 1 for a 1D, 2D or 3D one.

◆ getBuffer()

virtual const HardwarePixelBufferSharedPtr& Ogre::Texture::getBuffer ( size_t  face = 0,
size_t  mipmap = 0 
)
virtual

Return hardware pixel buffer for a surface.

This buffer can then be used to copy data from and to a particular level of the texture.

Parameters
faceFace number, in case of a cubemap texture. Must be 0 for other types of textures. For cubemaps, this is one of +X (0), -X (1), +Y (2), -Y (3), +Z (4), -Z (5)
mipmapMipmap level. This goes from 0 for the first, largest mipmap level to getNumMipmaps()-1 for the smallest.
Returns
A shared pointer to a hardware pixel buffer.
Remarks
The buffer is invalidated when the resource is unloaded or destroyed. Do not use it after the lifetime of the containing texture.

Reimplemented in Ogre::D3D9Texture.

◆ convertToImage()

void Ogre::Texture::convertToImage ( Image destImage,
bool  includeMipMaps = false 
)

Populate an Image with the contents of this texture.

Parameters
destImageThe target image (contents will be overwritten)
includeMipMapsWhether to embed mipmaps in the image

◆ getCustomAttribute() [1/2]

virtual void Ogre::Texture::getCustomAttribute ( const String name,
void *  pData 
)
virtual

Retrieve a platform or API-specific piece of information from this texture.

This method of retrieving information should only be used if you know what you're doing.

Name Description
GLID The OpenGL texture object id
Parameters
nameThe name of the attribute to retrieve.
pDataPointer to memory matching the type of data you want to retrieve.

Reimplemented in Ogre::GLTextureCommon.

◆ getCustomAttribute() [2/2]

uint Ogre::Texture::getCustomAttribute ( const String name)
inline

simplified API for bindings

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

◆ createShaderAccessPoint()

virtual void Ogre::Texture::createShaderAccessPoint ( uint  bindPoint,
TextureAccess  access = TA_READ_WRITE,
int  mipmapLevel = 0,
int  textureArrayIndex = 0,
PixelFormat  format = PF_UNKNOWN 
)
inlinevirtual

Enable read and/or write privileges to the texture from shaders.

Parameters
bindPointThe buffer binding location for shader access. For OpenGL this must be unique and is not related to the texture binding point.
accessThe texture access privileges given to the shader.
mipmapLevelThe texture mipmap level to use.
textureArrayIndexThe index of the texture array to use. If texture is not a texture array, set to 0.
formatTexture format to be read in by shader. For OpenGL this may be different than the bound texture format.

Reimplemented in Ogre::GL3PlusTexture.

◆ setLayerNames()

void Ogre::Texture::setLayerNames ( const std::vector< String > &  names)
inline

Set image names to be loaded as layers (3d & texture array) or cubemap faces.


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