Texture resource. More...

#include <OpenGl_Texture.hxx>

Inheritance diagram for OpenGl_Texture:

[legend]

Public Member Functions
	OpenGl_Texture (const TCollection_AsciiString &theResourceId=TCollection_AsciiString(), const Handle< Graphic3d_TextureParams > &theParams=Handle< Graphic3d_TextureParams >())
	Create uninitialized texture. More...

virtual	~OpenGl_Texture ()
	Destroy object. More...

bool	IsValid () const

GLenum	GetTarget () const

GLsizei	SizeX () const

GLsizei	SizeY () const

GLuint	TextureId () const

GLenum	GetFormat () const

bool	IsAlpha () const
	Return true for GL_RED and GL_ALPHA formats. More...

void	SetAlpha (const bool theValue)
	Setup to interprete the format as Alpha by Shader Manager (should be GL_ALPHA within compatible context or GL_RED otherwise). More...

bool	Create (const Handle< OpenGl_Context > &theCtx)
	Creates Texture id if not yet generated. Data should be initialized by another method. More...

virtual void	Release (OpenGl_Context *theCtx) override
	Destroy object - will release GPU memory if any. More...

const Handle< OpenGl_Sampler > &	Sampler () const
	Return texture sampler. More...

void	SetSampler (const Handle< OpenGl_Sampler > &theSampler)
	Set texture sampler. More...

bool	InitSamplerObject (const Handle< OpenGl_Context > &theCtx)
	Initialize the Sampler Object (as OpenGL object). More...

void	Bind (const Handle< OpenGl_Context > &theCtx) const
	Bind this Texture to the unit specified in sampler parameters. Also binds Sampler Object if it is allocated. More...

void	Unbind (const Handle< OpenGl_Context > &theCtx) const
	Unbind texture from the unit specified in sampler parameters. Also unbinds Sampler Object if it is allocated. More...

void	Bind (const Handle< OpenGl_Context > &theCtx, const Graphic3d_TextureUnit theTextureUnit) const
	Bind this Texture to specified unit. Also binds Sampler Object if it is allocated. More...

void	Unbind (const Handle< OpenGl_Context > &theCtx, const Graphic3d_TextureUnit theTextureUnit) const
	Unbind texture from specified unit. Also unbinds Sampler Object if it is allocated. More...

Standard_Size	Revision () const
	Revision of associated data source. More...

void	SetRevision (const Standard_Size theRevision)
	Set revision of associated data source. More...

bool	Init (const Handle< OpenGl_Context > &theCtx, const Image_PixMap &theImage, const Graphic3d_TypeOfTexture theType)
	Notice that texture will be unbound after this call. More...

bool	Init (const Handle< OpenGl_Context > &theCtx, const GLint theTextFormat, const GLenum thePixelFormat, const GLenum theDataType, const GLsizei theSizeX, const GLsizei theSizeY, const Graphic3d_TypeOfTexture theType, const Image_PixMap *theImage=NULL)
	Initialize the texture with specified format, size and texture type. If theImage is empty the texture data will contain trash. Notice that texture will be unbound after this call. More...

bool	Init2DMultisample (const Handle< OpenGl_Context > &theCtx, const GLsizei theNbSamples, const GLint theTextFormat, const GLsizei theSizeX, const GLsizei theSizeY)
	Initialize the 2D multisampling texture using glTexImage2DMultisample(). More...

bool	InitRectangle (const Handle< OpenGl_Context > &theCtx, const Standard_Integer theSizeX, const Standard_Integer theSizeY, const OpenGl_TextureFormat &theFormat)
	Allocates texture rectangle with specified format and size. More...

bool	Init3D (const Handle< OpenGl_Context > &theCtx, const GLint theTextFormat, const GLenum thePixelFormat, const GLenum theDataType, const Standard_Integer theSizeX, const Standard_Integer theSizeY, const Standard_Integer theSizeZ, const void *thePixels)
	Initializes 3D texture rectangle with specified format and size. More...

Standard_Boolean	HasMipmaps () const

virtual Standard_Size	EstimatedDataSize () const override
	Returns estimated GPU memory usage for holding data without considering overheads and allocation alignment rules. More...

Public Member Functions inherited from OpenGl_NamedResource
	OpenGl_NamedResource (const TCollection_AsciiString &theId)
	Empty constructor. More...

const TCollection_AsciiString &	ResourceId () const
	Return resource name. More...

Public Member Functions inherited from OpenGl_Resource
	OpenGl_Resource ()
	Empty constructor. More...

virtual	~OpenGl_Resource ()
	Destructor. Inheritors should call Clean (NULL) within it. More...

Public Member Functions inherited from Standard_Transient
	Standard_Transient ()
	Empty constructor. More...

	Standard_Transient (const Standard_Transient &)
	Copy constructor – does nothing. More...

Standard_Transient &	operator= (const Standard_Transient &)
	Assignment operator, needed to avoid copying reference counter. More...

virtual	~Standard_Transient ()
	Destructor must be virtual. More...

virtual void	Delete () const
	Memory deallocator for transient classes. More...

virtual const opencascade::handle< Standard_Type > &	DynamicType () const
	Returns a type descriptor about this object. More...

Standard_Boolean	IsInstance (const opencascade::handle< Standard_Type > &theType) const
	Returns a true value if this is an instance of Type. More...

Standard_Boolean	IsInstance (const Standard_CString theTypeName) const
	Returns a true value if this is an instance of TypeName. More...

Standard_Boolean	IsKind (const opencascade::handle< Standard_Type > &theType) const
	Returns true if this is an instance of Type or an instance of any class that inherits from Type. Note that multiple inheritance is not supported by OCCT RTTI mechanism. More...

Standard_Boolean	IsKind (const Standard_CString theTypeName) const
	Returns true if this is an instance of TypeName or an instance of any class that inherits from TypeName. Note that multiple inheritance is not supported by OCCT RTTI mechanism. More...

Standard_Transient *	This () const
	Returns non-const pointer to this object (like const_cast). For protection against creating handle to objects allocated in stack or call from constructor, it will raise exception Standard_ProgramError if reference counter is zero. More...

Standard_Integer	GetRefCount () const
	Get the reference counter of this object. More...

void	IncrementRefCounter () const
	Increments the reference counter of this object. More...

Standard_Integer	DecrementRefCounter () const
	Decrements the reference counter of this object; returns the decremented value. More...

Static Public Member Functions
static Standard_Size	PixelSizeOfPixelFormat (Standard_Integer theInternalFormat)
	Return pixel size of pixel format in bytes. Note that this method considers that OpenGL natively supports this pixel format, which might be not the case - in the latter case, actual pixel size might differ! More...

static bool	GetDataFormat (const Handle< OpenGl_Context > &theCtx, const Image_PixMap &theData, GLint &theTextFormat, GLenum &thePixelFormat, GLenum &theDataType)
	Return texture type and format by Image_PixMap data format. More...

Static Public Member Functions inherited from Standard_Transient
static const char *	get_type_name ()
	Returns a type descriptor about this object. More...

static const opencascade::handle< Standard_Type > &	get_type_descriptor ()
	Returns type descriptor of Standard_Transient class. More...

Static Public Attributes
static const GLuint	NO_TEXTURE = 0
	Helpful constants. More...

Protected Member Functions
void	applyDefaultSamplerParams (const Handle< OpenGl_Context > &theCtx)
	Apply default sampler parameters after texture creation. More...

Protected Attributes
Handle< OpenGl_Sampler >	mySampler
	texture sampler More...

Standard_Size	myRevision
	revision of associated data source More...

GLuint	myTextureId
	GL resource ID. More...

GLenum	myTarget
	GL_TEXTURE_1D/GL_TEXTURE_2D/GL_TEXTURE_3D. More...

GLsizei	mySizeX
	texture width More...

GLsizei	mySizeY
	texture height More...

GLsizei	mySizeZ
	texture depth More...

GLenum	myTextFormat
	texture format - GL_RGB, GL_RGBA,... More...

GLint	mySizedFormat
	internal (sized) texture format More...

Standard_Integer	myNbSamples
	number of MSAA samples More...

Standard_Boolean	myHasMipmaps
	flag indicates that texture was uploaded with mipmaps More...

bool	myIsAlpha
	indicates alpha format More...

Protected Attributes inherited from OpenGl_NamedResource
TCollection_AsciiString	myResourceId
	resource name More...

Additional Inherited Members
Public Types inherited from Standard_Transient
typedef void	base_type
	Returns a type descriptor about this object. More...

Detailed Description

Texture resource.

Constructor & Destructor Documentation

◆ OpenGl_Texture()

OpenGl_Texture::OpenGl_Texture	(	const TCollection_AsciiString &	theResourceId = `TCollection_AsciiString()`,
		const Handle< Graphic3d_TextureParams > &	theParams = `Handle< Graphic3d_TextureParams >()`
	)

Create uninitialized texture.

◆ ~OpenGl_Texture()

virtual OpenGl_Texture::~OpenGl_Texture ( )

virtual

Destroy object.

Member Function Documentation

◆ applyDefaultSamplerParams()

void OpenGl_Texture::applyDefaultSamplerParams ( const Handle< OpenGl_Context > & theCtx )

protected

Apply default sampler parameters after texture creation.

◆ Bind() [1/2]

void OpenGl_Texture::Bind ( const Handle< OpenGl_Context > & theCtx ) const

inline

Bind this Texture to the unit specified in sampler parameters. Also binds Sampler Object if it is allocated.

◆ Bind() [2/2]

void OpenGl_Texture::Bind	(	const Handle< OpenGl_Context > &	theCtx,
		const Graphic3d_TextureUnit	theTextureUnit
	)		const

Bind this Texture to specified unit. Also binds Sampler Object if it is allocated.

◆ Create()

bool OpenGl_Texture::Create ( const Handle< OpenGl_Context > & theCtx )

Creates Texture id if not yet generated. Data should be initialized by another method.

◆ EstimatedDataSize()

virtual Standard_Size OpenGl_Texture::EstimatedDataSize ( ) const

overridevirtual

Returns estimated GPU memory usage for holding data without considering overheads and allocation alignment rules.

Implements OpenGl_Resource.

◆ GetDataFormat()

static bool OpenGl_Texture::GetDataFormat	(	const Handle< OpenGl_Context > &	theCtx,
		const Image_PixMap &	theData,
		GLint &	theTextFormat,
		GLenum &	thePixelFormat,
		GLenum &	theDataType
	)

static

Return texture type and format by Image_PixMap data format.

◆ GetFormat()

GLenum OpenGl_Texture::GetFormat ( ) const

inline

Returns: texture format (not sized)

◆ GetTarget()

GLenum OpenGl_Texture::GetTarget ( ) const

inline

Returns: target to which the texture is bound (GL_TEXTURE_1D, GL_TEXTURE_2D)

◆ HasMipmaps()

Standard_Boolean OpenGl_Texture::HasMipmaps ( ) const

inline

Returns: true if texture was generated within mipmaps

◆ Init() [1/2]

bool OpenGl_Texture::Init	(	const Handle< OpenGl_Context > &	theCtx,
		const Image_PixMap &	theImage,
		const Graphic3d_TypeOfTexture	theType
	)

Notice that texture will be unbound after this call.

◆ Init() [2/2]

bool OpenGl_Texture::Init	(	const Handle< OpenGl_Context > &	theCtx,
		const GLint	theTextFormat,
		const GLenum	thePixelFormat,
		const GLenum	theDataType,
		const GLsizei	theSizeX,
		const GLsizei	theSizeY,
		const Graphic3d_TypeOfTexture	theType,
		const Image_PixMap *	theImage = `NULL`
	)

Initialize the texture with specified format, size and texture type. If theImage is empty the texture data will contain trash. Notice that texture will be unbound after this call.

◆ Init2DMultisample()

bool OpenGl_Texture::Init2DMultisample	(	const Handle< OpenGl_Context > &	theCtx,
		const GLsizei	theNbSamples,
		const GLint	theTextFormat,
		const GLsizei	theSizeX,
		const GLsizei	theSizeY
	)

Initialize the 2D multisampling texture using glTexImage2DMultisample().

◆ Init3D()

bool OpenGl_Texture::Init3D	(	const Handle< OpenGl_Context > &	theCtx,
		const GLint	theTextFormat,
		const GLenum	thePixelFormat,
		const GLenum	theDataType,
		const Standard_Integer	theSizeX,
		const Standard_Integer	theSizeY,
		const Standard_Integer	theSizeZ,
		const void *	thePixels
	)

Initializes 3D texture rectangle with specified format and size.

◆ InitRectangle()

bool OpenGl_Texture::InitRectangle	(	const Handle< OpenGl_Context > &	theCtx,
		const Standard_Integer	theSizeX,
		const Standard_Integer	theSizeY,
		const OpenGl_TextureFormat &	theFormat
	)

Allocates texture rectangle with specified format and size.

Note: Texture data is not initialized (will contain trash).

◆ InitSamplerObject()

bool OpenGl_Texture::InitSamplerObject ( const Handle< OpenGl_Context > & theCtx )

Initialize the Sampler Object (as OpenGL object).

Parameters

theCtx currently bound OpenGL context

◆ IsAlpha()

bool OpenGl_Texture::IsAlpha ( ) const

inline

Return true for GL_RED and GL_ALPHA formats.

◆ IsValid()

bool OpenGl_Texture::IsValid ( ) const

inline

Returns: true if current object was initialized

◆ PixelSizeOfPixelFormat()

static Standard_Size OpenGl_Texture::PixelSizeOfPixelFormat ( Standard_Integer theInternalFormat )

static

Return pixel size of pixel format in bytes. Note that this method considers that OpenGL natively supports this pixel format, which might be not the case - in the latter case, actual pixel size might differ!

◆ Release()

virtual void OpenGl_Texture::Release ( OpenGl_Context * theCtx )

overridevirtual

Destroy object - will release GPU memory if any.

Implements OpenGl_Resource.

Reimplemented in OpenGl_PointSprite.

◆ Revision()

Standard_Size OpenGl_Texture::Revision ( ) const

inline

Revision of associated data source.

◆ Sampler()

const Handle< OpenGl_Sampler >& OpenGl_Texture::Sampler ( ) const

inline

Return texture sampler.

◆ SetAlpha()

void OpenGl_Texture::SetAlpha ( const bool theValue )

inline

Setup to interprete the format as Alpha by Shader Manager (should be GL_ALPHA within compatible context or GL_RED otherwise).

◆ SetRevision()

void OpenGl_Texture::SetRevision ( const Standard_Size theRevision )

inline

Set revision of associated data source.

◆ SetSampler()

void OpenGl_Texture::SetSampler ( const Handle< OpenGl_Sampler > & theSampler )

inline

Set texture sampler.

◆ SizeX()

GLsizei OpenGl_Texture::SizeX ( ) const

inline

Returns: texture width (0 LOD)

◆ SizeY()

GLsizei OpenGl_Texture::SizeY ( ) const

inline

Returns: texture height (0 LOD)

◆ TextureId()

GLuint OpenGl_Texture::TextureId ( ) const

inline

Returns: texture ID

◆ Unbind() [1/2]

void OpenGl_Texture::Unbind ( const Handle< OpenGl_Context > & theCtx ) const

inline

Unbind texture from the unit specified in sampler parameters. Also unbinds Sampler Object if it is allocated.

◆ Unbind() [2/2]

void OpenGl_Texture::Unbind	(	const Handle< OpenGl_Context > &	theCtx,
		const Graphic3d_TextureUnit	theTextureUnit
	)		const

Unbind texture from specified unit. Also unbinds Sampler Object if it is allocated.

Field Documentation

◆ myHasMipmaps

Standard_Boolean OpenGl_Texture::myHasMipmaps

protected

flag indicates that texture was uploaded with mipmaps

◆ myIsAlpha

bool OpenGl_Texture::myIsAlpha

protected

indicates alpha format

◆ myNbSamples

Standard_Integer OpenGl_Texture::myNbSamples

protected

number of MSAA samples

◆ myRevision

Standard_Size OpenGl_Texture::myRevision

protected

revision of associated data source

◆ mySampler

Handle< OpenGl_Sampler > OpenGl_Texture::mySampler

protected

texture sampler

◆ mySizedFormat

GLint OpenGl_Texture::mySizedFormat

protected

internal (sized) texture format

◆ mySizeX

GLsizei OpenGl_Texture::mySizeX

protected

texture width

◆ mySizeY

GLsizei OpenGl_Texture::mySizeY

protected

texture height

◆ mySizeZ

GLsizei OpenGl_Texture::mySizeZ

protected

texture depth

◆ myTarget

GLenum OpenGl_Texture::myTarget

protected

GL_TEXTURE_1D/GL_TEXTURE_2D/GL_TEXTURE_3D.

◆ myTextFormat

GLenum OpenGl_Texture::myTextFormat

protected

texture format - GL_RGB, GL_RGBA,...

◆ myTextureId

GLuint OpenGl_Texture::myTextureId

protected

GL resource ID.

◆ NO_TEXTURE

const GLuint OpenGl_Texture::NO_TEXTURE = 0

static

Helpful constants.

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

OpenGl_Texture.hxx

Public Member Functions

Static Public Member Functions

Static Public Attributes

Protected Member Functions

Protected Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ OpenGl_Texture()

◆ ~OpenGl_Texture()

Member Function Documentation

◆ applyDefaultSamplerParams()

◆ Bind() [1/2]

◆ Bind() [2/2]

◆ Create()

◆ EstimatedDataSize()

◆ GetDataFormat()

◆ GetFormat()

◆ GetTarget()

◆ HasMipmaps()

◆ Init() [1/2]

◆ Init() [2/2]

◆ Init2DMultisample()

◆ Init3D()

◆ InitRectangle()

◆ InitSamplerObject()

◆ IsAlpha()

◆ IsValid()

◆ PixelSizeOfPixelFormat()

◆ Release()

◆ Revision()

◆ Sampler()

◆ SetAlpha()

◆ SetRevision()

◆ SetSampler()

◆ SizeX()

◆ SizeY()

◆ TextureId()

◆ Unbind() [1/2]

◆ Unbind() [2/2]

Field Documentation

◆ myHasMipmaps

◆ myIsAlpha

◆ myNbSamples

◆ myRevision

◆ mySampler

◆ mySizedFormat

◆ mySizeX

◆ mySizeY

◆ mySizeZ

◆ myTarget

◆ myTextFormat

◆ myTextureId

◆ NO_TEXTURE