OpenGLFramebufferObject class encapsulates framebuffer OpenGL object. More...

#include <vsn_openglfbo.h>

Public Member Functions
	OpenGLFramebufferObject (int width, int height, int multisample=0, bool depth=false, bool stencil=false)
	Constructor. More...

	OpenGLFramebufferObject (const SizeI &size, int multisample=0, bool depth=false, bool stencil=false)
	Constructor. More...

virtual	~OpenGLFramebufferObject ()
	Destructor.

void	Bind ()
	Binds Framebuffer.

void	Release ()
	Releases Framebuffer.

void	Update (int width, int height)
	Changes sizes.

int	GetWidth () const
	Returns Framebuffer width.

int	GetHeight () const
	Returns Framebuffer height.

bool	IsValid () const
	Checks buffer state.

Image	MakeImage ()
	Saves in image.

Image	MakeImage (int x1, int y1, int x2, int y2)
	Saves in image.

GLuint	MakeTexture () const
	Makes texture from buffer content. Texture doesn't need to be deleted.

GLuint	MakeDepthTexture () const
	Makes depth texture from buffer content. Texture doesn't need to be deleted.

void	RenderImage (float left, float bottom, float width, float height)
	Displays buffer content in given rectangle.

Detailed Description

OpenGLFramebufferObject class encapsulates framebuffer OpenGL object.

OpenGLFramebufferObject class presents some surface of rendering on which you can also render with calling OpenGL functions. This surface can be linked and used as ordinary texture in your own code for rendering OpenGL. OpenGLFramebufferObject class generates by default OpenGL 2D texture and uses GL_TEXTURE_2D used inside rendering. When creating OpenGLFramebufferObject it's necessary to operate with depth and stencil flags to have a correct display. To display primitives antialised, it's necessary to set SetSamples when setting OpenGL format.

Note: When creating OpenGLFramebuffer object, it's important to know the current OpenGL context. Otherwise initialization will fail.

Constructor & Destructor Documentation

◆ OpenGLFramebufferObject() [1/2]

VSN::OpenGLFramebufferObject::OpenGLFramebufferObject	(	int	width,
		int	height,
		int	multisample = `0`,
		bool	depth = `false`,
		bool	stencil = `false`
	)

Constructor.

Parameters

[in]	width	- Width.
[in]	height	- Height.
[in]	multisample	- Level of antialiasing.
[in]	depth	- Creates depth buffer or not.
[in]	stencil	- Creates stencil buffer or not.

◆ OpenGLFramebufferObject() [2/2]

VSN::OpenGLFramebufferObject::OpenGLFramebufferObject	(	const SizeI &	size,
		int	multisample = `0`,
		bool	depth = `false`,
		bool	stencil = `false`
	)