cv::ogl::Texture2D Class Reference

Smart pointer for OpenGL 2D texture memory with reference counting. More...

#include <opencv2/core/opengl.hpp>

Public Types
enum	Format {   NONE = 0,   DEPTH_COMPONENT = 0x1902,   RGB = 0x1907,   RGBA = 0x1908 }
	An Image Format describes the way that the images in Textures store their data. More...

Public Member Functions
	Texture2D ()
	The constructors. More...
	Texture2D (int arows, int acols, Format aformat, unsigned int atexId, bool autoRelease=false)
	Texture2D (Size asize, Format aformat, unsigned int atexId, bool autoRelease=false)
	Texture2D (int arows, int acols, Format aformat, bool autoRelease=false)
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. More...
	Texture2D (Size asize, Format aformat, bool autoRelease=false)
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. More...
	Texture2D (InputArray arr, bool autoRelease=false)
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. More...
void	bind () const
	Binds texture to current active texture unit for GL_TEXTURE_2D target. More...
int	cols () const
void	copyFrom (InputArray arr, bool autoRelease=false)
	Copies from host/device memory to OpenGL texture. More...
void	copyTo (OutputArray arr, int ddepth=CV_32F, bool autoRelease=false) const
	Copies from OpenGL texture to host/device memory or another OpenGL texture object. More...
void	create (int arows, int acols, Format aformat, bool autoRelease=false)
	Allocates memory for ogl::Texture2D object. More...
void	create (Size asize, Format aformat, bool autoRelease=false)
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. More...
bool	empty () const
Format	format () const
void	release ()
	Decrements the reference counter and destroys the texture object if needed. More...
int	rows () const
void	setAutoRelease (bool flag)
	Sets auto release mode. More...
Size	size () const
unsigned int	texId () const
	get OpenGL opject id More...

Detailed Description

Smart pointer for OpenGL 2D texture memory with reference counting.

Member Enumeration Documentation

Format

enum cv::ogl::Texture2D::Format

An Image Format describes the way that the images in Textures store their data.

Enumerator
NONE
DEPTH_COMPONENT	Depth.
RGB	Red, Green, Blue.
RGBA	Red, Green, Blue, Alpha.

Constructor & Destructor Documentation

Texture2D() [1/6]

cv::ogl::Texture2D::Texture2D

(

)

The constructors.

Creates empty ogl::Texture2D object, allocates memory for ogl::Texture2D object or copies from host/device memory.

Texture2D() [2/6]

cv::ogl::Texture2D::Texture2D	(	int	arows,
		int	acols,
		Format	aformat,
		unsigned int	atexId,
		bool	autoRelease = false
	)

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

Texture2D() [3/6]

cv::ogl::Texture2D::Texture2D	(	Size	asize,
		Format	aformat,
		unsigned int	atexId,
		bool	autoRelease = false
	)

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

Texture2D() [4/6]

cv::ogl::Texture2D::Texture2D	(	int	arows,
		int	acols,
		Format	aformat,
		bool	autoRelease = false
	)

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

Parameters

arows	Number of rows.
acols	Number of columns.
aformat	Image format. See cv::ogl::Texture2D::Format .
autoRelease	Auto release mode (if true, release will be called in object's destructor).

Texture2D() [5/6]

cv::ogl::Texture2D::Texture2D	(	Size	asize,
		Format	aformat,
		bool	autoRelease = false
	)

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

Parameters

asize	2D array size.
aformat	Image format. See cv::ogl::Texture2D::Format .
autoRelease	Auto release mode (if true, release will be called in object's destructor).

Texture2D() [6/6]

cv::ogl::Texture2D::Texture2D ( InputArray  arr, bool  autoRelease = false  )

explicit

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

Parameters

arr	Input array (host or device memory, it can be Mat , cuda::GpuMat or ogl::Buffer ).
autoRelease	Auto release mode (if true, release will be called in object's destructor).

Member Function Documentation

bind()

void cv::ogl::Texture2D::bind

(

)

const

Binds texture to current active texture unit for GL_TEXTURE_2D target.

cols()

int cv::ogl::Texture2D::cols

(

)

const

copyFrom()

void cv::ogl::Texture2D::copyFrom	(	InputArray	arr,
		bool	autoRelease = false
	)

Copies from host/device memory to OpenGL texture.

Parameters

arr	Input array (host or device memory, it can be Mat , cuda::GpuMat or ogl::Buffer ).
autoRelease	Auto release mode (if true, release will be called in object's destructor).

copyTo()

void cv::ogl::Texture2D::copyTo	(	OutputArray	arr,
		int	ddepth = CV_32F,
		bool	autoRelease = false
	)		const

Copies from OpenGL texture to host/device memory or another OpenGL texture object.

Parameters

arr	Destination array (host or device memory, can be Mat , cuda::GpuMat , ogl::Buffer or ogl::Texture2D ).
ddepth	Destination depth.
autoRelease	Auto release mode for destination buffer (if arr is OpenGL buffer or texture).

create() [1/2]

void cv::ogl::Texture2D::create	(	int	arows,
		int	acols,
		Format	aformat,
		bool	autoRelease = false
	)

Allocates memory for ogl::Texture2D object.

Parameters

arows	Number of rows.
acols	Number of columns.
aformat	Image format. See cv::ogl::Texture2D::Format .
autoRelease	Auto release mode (if true, release will be called in object's destructor).

create() [2/2]

void cv::ogl::Texture2D::create	(	Size	asize,
		Format	aformat,
		bool	autoRelease = false
	)

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

Parameters

asize	2D array size.
aformat	Image format. See cv::ogl::Texture2D::Format .
autoRelease	Auto release mode (if true, release will be called in object's destructor).

empty()

bool cv::ogl::Texture2D::empty

(

)

const

format()

Format cv::ogl::Texture2D::format

(

)

const

release()

void cv::ogl::Texture2D::release

(

)

Decrements the reference counter and destroys the texture object if needed.

The function will call setAutoRelease(true) .

rows()

int cv::ogl::Texture2D::rows

(

)

const

setAutoRelease()

void cv::ogl::Texture2D::setAutoRelease

(

bool

flag

)

Sets auto release mode.

Parameters

flag	Auto release mode (if true, release will be called in object's destructor).

The lifetime of the OpenGL object is tied to the lifetime of the context. If OpenGL context was bound to a window it could be released at any time (user can close a window). If object's destructor is called after destruction of the context it will cause an error. Thus ogl::Texture2D doesn't destroy OpenGL object in destructor by default (all OpenGL resources will be released with OpenGL context). This function can force ogl::Texture2D destructor to destroy OpenGL object.

size()

Size cv::ogl::Texture2D::size

(

)

const

texId()

unsigned int cv::ogl::Texture2D::texId

(

)

const

get OpenGL opject id

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

• opencv2/core/opengl.hpp