eq::util::Texture Class Reference

A wrapper around OpenGL textures. More...

#include <texture.h>

Collaboration diagram for eq::util::Texture:

Public Member Functions
EQ_API	Texture (const unsigned target, const GLEWContext *const glewContext=0)
	Construct a new Texture. More...
virtual EQ_API	~Texture ()
	Destruct the texture. More...
EQ_API const GLEWContext *	glewGetContext () const
EQ_API void	setGLEWContext (const GLEWContext *context)
Data Access.
EQ_API unsigned	getTarget () const
uint32_t	getCompressorTarget () const
EQ_API unsigned	getInternalFormat () const
EQ_API void	setExternalFormat (const uint32_t format, const uint32_t type)
	Set the external data format and type. More...
EQ_API unsigned	getFormat () const
EQ_API unsigned	getType () const
EQ_API unsigned	getName () const
EQ_API int32_t	getWidth () const
EQ_API int32_t	getHeight () const
EQ_API bool	isValid () const
Operations.
EQ_API void	init (const unsigned internalFormat, const int32_t width, const int32_t height)
	Initialize an OpenGL texture. More...
EQ_API void	flush ()
	Clear the texture, including deleting the GL texture name. More...
EQ_API void	applyZoomFilter (const ZoomFilter filter) const
EQ_API void	applyWrap () const
EQ_API void	copyFromFrameBuffer (const unsigned internalFormat, const fabric::PixelViewport &pvp)
	Copy the specified area from the current read buffer to the texture at 0,0. More...
EQ_API void	upload (const int32_t width, const int32_t height, const void *ptr)
	Copy the specified buffer to the texture at 0,0. More...
EQ_API void	download (void *buffer) const
	Copy the texture data from the GPU to the given memory address. More...
EQ_API void	bind () const
	Bind the texture. More...
EQ_API void	bindToFBO (const unsigned target, const int32_t width, const int32_t height, const int32_t samples=1)
	Create and bind a texture to the current FBO. More...
EQ_API void	resize (const int32_t width, const int32_t height)
	Resize the texture. More...
EQ_API void	writeRGB (const std::string &filename) const
	Write the texture data as an rgb image file. More...
Wrap existing GL textures
EQ_API void	flushNoDelete ()
	Flush the texture without deleting the GL texture name. More...
EQ_API void	setGLData (const unsigned id, const unsigned internalFormat, const int32_t width, const int32_t height)
	Use an OpenGL texture created externally. More...

Detailed Description

A wrapper around OpenGL textures.

So far used by the Image and Compositor. The target is assumed to be GL_TEXTURE_RECTANGLE_ARB or GL_TEXTURE_2D.

Definition at line 41 of file texture.h.

Constructor & Destructor Documentation

EQ_API eq::util::Texture::Texture	(	const unsigned	target,
		const GLEWContext *const	glewContext = 0
	)

Construct a new Texture.

A GLEWContext might be provided later using setGLEWContext(). It is needed for operations using OpenGL extensions or version 1.2 or later functions.

Version

1.0

virtual EQ_API eq::util::Texture::~Texture ( )

virtual

Destruct the texture.

Version

1.0

Member Function Documentation

EQ_API void eq::util::Texture::bind

(

)

const

Bind the texture.

Version

1.0

EQ_API void eq::util::Texture::bindToFBO	(	const unsigned	target,
		const int32_t	width,
		const int32_t	height,
		const int32_t	samples = 1
	)

Create and bind a texture to the current FBO.

Version

1.0

EQ_API void eq::util::Texture::copyFromFrameBuffer	(	const unsigned	internalFormat,
		const fabric::PixelViewport &	pvp
	)

Copy the specified area from the current read buffer to the texture at 0,0.

Version

1.0

EQ_API void eq::util::Texture::download

(

void *

buffer

)

const

Copy the texture data from the GPU to the given memory address.

Version

1.0

EQ_API void eq::util::Texture::flush

(

)

Clear the texture, including deleting the GL texture name.

Version

1.0

EQ_API void eq::util::Texture::flushNoDelete

(

)

Flush the texture without deleting the GL texture name.

Version

1.0

EQ_API unsigned eq::util::Texture::getFormat

(

)

const

Returns

the external data format of the texture, e.g., GL_RGBA.

Version

1.0

EQ_API int32_t eq::util::Texture::getHeight

(

)

const

Returns

the current height.

Version

1.0

EQ_API unsigned eq::util::Texture::getInternalFormat

(

)

const

Returns

the internal (GPU) pixel format of the texture.

See also

init()

Version

1.0

EQ_API unsigned eq::util::Texture::getName

(

)

const

Returns

the OpenGL texture name.

Version

1.0

EQ_API unsigned eq::util::Texture::getTarget

(

)

const

Returns

the target of the texture.

Version

1.0

EQ_API unsigned eq::util::Texture::getType

(

)

const

Returns

the external data type of the texture, e.g., GL_HALF_FLOAT.

Version

1.0

EQ_API int32_t eq::util::Texture::getWidth

(

)

const

Returns

the current width.

Version

1.0

EQ_API void eq::util::Texture::init	(	const unsigned	internalFormat,
		const int32_t	width,
		const int32_t	height
	)

Initialize an OpenGL texture.

Parameters

internalFormat	the OpenGL texture internal format.
width	the width of the texture.
height	the height of the texture.

Version

1.0

EQ_API bool eq::util::Texture::isValid

(

)

const

Returns

true if the texture can be bound.

Version

1.0

EQ_API void eq::util::Texture::resize	(	const int32_t	width,
		const int32_t	height
	)

Resize the texture.

Version

1.0

EQ_API void eq::util::Texture::setExternalFormat	(	const uint32_t	format,
		const uint32_t	type
	)

Set the external data format and type.

Parameters

format	the OpenGL format.
type	the OpenGL Type.

Version

1.0

EQ_API void eq::util::Texture::setGLData	(	const unsigned	id,
		const unsigned	internalFormat,
		const int32_t	width,
		const int32_t	height
	)

Use an OpenGL texture created externally.

The previous GL texture, if any, is deallocated using flush(). The new texture has to be of the correct target, size and internal format. The texture is validated by this method.

Parameters

id	The OpenGL texture name.
internalFormat	the OpenGL texture internal format.
width	the width of the texture.
height	the height of the texture.

Version

1.0

EQ_API void eq::util::Texture::upload	(	const int32_t	width,
		const int32_t	height,
		const void *	ptr
	)

Copy the specified buffer to the texture at 0,0.

Version

1.0

EQ_API void eq::util::Texture::writeRGB

(

const std::string &

filename

)

const

Write the texture data as an rgb image file.

Version

1.0

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

• texture.h