this class encapsulate frame buffers that live on the GPU and can be used as destination for the render process. More...

#include <frame_buffer.h>

Inheritance diagram for cgv::render::frame_buffer:

Public Member Functions
	frame_buffer ()
	constructor just initializes stuff

	~frame_buffer ()
	destructor

void	destruct (const context &ctx)
	destruct the framebuffer objext

bool	create (const context &ctx, int _width=-1, int _height=-1)
	create framebuffer if extension is supported, otherwise return false.

void	set_width (int _width)
	set a different width

void	set_height (int _height)
	set a different height

void	set_size (int _width, int _height)
	set different size

int	get_width () const
	return the width

int	get_height () const
	return the height

bool	attach (const context &ctx, const render_buffer &rb, int i=0)
	attach render buffer to depth buffer if it is a depth buffer, to stencil if it is a stencil buffer or to the i-th color attachment if it is a color buffer

bool	attach (const context &ctx, const texture &tex2d, int level=0, int i=0)
	attach 2d texture to depth buffer if it is a depth texture, to stencil if it is a stencil texture or to the i-th color attachment if it is a color texture

bool	attach (const context &ctx, const texture &tex3d, int z_or_cube_side, int level, int i)
	attach the j-th slice of a 3d texture or the given cube side of a cubemap to the i-th color attachment

bool	is_complete (const context &ctx) const
	check for completeness, if not complete, get the reason in last_error

bool	enable (context &ctx, int i0=-1, int i1=-1, int i2=-1, int i3=-1, int i4=-1, int i5=-1, int i6=-1, int i7=-1, int i8=-1, int i9=-1, int i10=-1, int i11=-1, int i12=-1, int i13=-1, int i14=-1, int i15=-1)
	enable the framebuffer either with all color attachments if no arguments are given or if arguments are given with the indexed color attachments.

bool	enable (context &ctx, std::vector< int > &indices)
	enable the framebuffer either with the color attachments specified in the given vector.

void	push_viewport (context &ctx, const dvec2 &depth_range=dvec2(0, 1))
	push a new window transformation to cover the fbo onto the window transformation stack

void	pop_viewport (context &ctx)
	recover the window transformation array active before the last call to push_viewport

bool	disable (context &ctx)
	disable the framebuffer object

void	blit_to (context &ctx, BufferTypeBits btbs=BTB_ALL_BITS, bool interpolate=false) const
	different variants of blitting rectangle src_rect of this frame buffer into rectangle dest_rect of destination frame buffer

void	blit_to (context &ctx, const ivec4 &src_rect, BufferTypeBits btbs=BTB_ALL_BITS, bool interpolate=false) const

void	blit_to (context &ctx, const ivec4 &src_rect, const ivec4 &dst_rect, BufferTypeBits btbs=BTB_ALL_BITS, bool interpolate=false) const

void	blit_to (context &ctx, frame_buffer &dst_fbo, BufferTypeBits btbs=BTB_ALL_BITS, bool interpolate=false) const

void	blit_to (context &ctx, frame_buffer &dst_fbo, const ivec4 &src_rect, BufferTypeBits btbs=BTB_ALL_BITS, bool interpolate=false) const

void	blit_to (context &ctx, frame_buffer &dst_fbo, const ivec4 &src_rect, const ivec4 &dst_rect, BufferTypeBits btbs=BTB_ALL_BITS, bool interpolate=false) const

void	blit_from (context &ctx, BufferTypeBits btbs=BTB_ALL_BITS, bool interpolate=false)
	different variants of blitting to rectangle dst_rect of this frame buffer from rectangle src_rect of source frame buffer

void	blit_from (context &ctx, const ivec4 &dst_rect, BufferTypeBits btbs=BTB_ALL_BITS, bool interpolate=false)

void	blit_from (context &ctx, const ivec4 &dst_rect, const ivec4 &src_rect, BufferTypeBits btbs=BTB_ALL_BITS, bool interpolate=false)

void	blit_from (context &ctx, frame_buffer &src_fbo, BufferTypeBits btbs=BTB_ALL_BITS, bool interpolate=false)

void	blit_from (context &ctx, frame_buffer &src_fbo, const ivec4 &dst_rect, BufferTypeBits btbs=BTB_ALL_BITS, bool interpolate=false)

void	blit_from (context &ctx, frame_buffer &src_fbo, const ivec4 &dst_rect, const ivec4 &src_rect, BufferTypeBits btbs=BTB_ALL_BITS, bool interpolate=false)

Public Member Functions inherited from cgv::render::frame_buffer_base
	frame_buffer_base ()
	initialize members

Public Member Functions inherited from cgv::render::render_component
	render_component ()
	initialize members

virtual bool	is_created () const
	return whether component has been created

void	put_id_void (void *ptr) const
	copy the rendering api specific id the component to the memory location of the given pointer.

template<typename T >
void	put_id (T &id) const
	cast the refence to rendering api specific representation of component id to the specified type

Static Public Member Functions
static int	get_max_nr_color_attachments (const context &ctx)
	return the maximum number of color attachments supported by the GPU

static int	get_max_nr_draw_buffers (const context &ctx)
	return the maximum number of simultaneous draw buffers supported by the GPU

Public Attributes
std::string	last_error
	a string that contains the last error, which is only set by the init method

Public Attributes inherited from cgv::render::render_component
void *	handle

void *	internal_format

void *	user_data

const context *	ctx_ptr
	keep pointer to my context

std::string	last_error
	a string that contains the last error

Additional Inherited Members
Protected Attributes inherited from cgv::render::frame_buffer_base
bool	is_enabled

std::vector< int >	enabled_color_attachments

bool	depth_attached

bool	attached [16]

int	width

int	height

Detailed Description

this class encapsulate frame buffers that live on the GPU and can be used as destination for the render process.

The GPU must support frame buffer objects for this to work.

Definition at line 16 of file frame_buffer.h.

Constructor & Destructor Documentation

◆ frame_buffer()

cgv::render::frame_buffer::frame_buffer ( )

constructor just initializes stuff

Definition at line 6 of file frame_buffer.cxx.

◆ ~frame_buffer()

cgv::render::frame_buffer::~frame_buffer ( )

destructor

Definition at line 33 of file frame_buffer.cxx.

References cgv::render::render_component::ctx_ptr, and destruct().

Member Function Documentation

◆ attach() [1/3]

bool cgv::render::frame_buffer::attach	(	const context &	ctx,
		const render_buffer &	rb,
		int	i = `0`
	)

attach render buffer to depth buffer if it is a depth buffer, to stencil if it is a stencil buffer or to the i-th color attachment if it is a color buffer

Definition at line 82 of file frame_buffer.cxx.

References cgv::render::render_buffer::is_depth_buffer().

Referenced by cgv::render::gl::gl_transparent_renderer::create_and_attach_texture(), vr_test::init_frame(), cgv::render::gl::render_to_texture3D(), and cgv::render::texture::write_to_file().

◆ attach() [2/3]

bool cgv::render::frame_buffer::attach	(	const context &	ctx,
		const texture &	tex2d,
		int	level = `0`,
		int	i = `0`
	)

attach 2d texture to depth buffer if it is a depth texture, to stencil if it is a stencil texture or to the i-th color attachment if it is a color texture

Definition at line 88 of file frame_buffer.cxx.

References cgv::data::CF_D, cgv::render::texture::ensure_state(), cgv::data::data_format::get_nr_dimensions(), cgv::data::component_format::get_standard_component_format(), and last_error.

◆ attach() [3/3]

bool cgv::render::frame_buffer::attach	(	const context &	ctx,
		const texture &	tex3d,
		int	z_or_cube_side,
		int	level,
		int	i
	)

attach the j-th slice of a 3d texture or the given cube side of a cubemap to the i-th color attachment

attach the j-th slice of a 3d texture to the i-th color attachment

Definition at line 99 of file frame_buffer.cxx.

References cgv::data::CF_D, cgv::render::texture::ensure_state(), cgv::data::data_format::get_nr_dimensions(), cgv::data::component_format::get_standard_component_format(), and last_error.

◆ blit_from() [1/6]

void cgv::render::frame_buffer::blit_from	(	context &	ctx,
		BufferTypeBits	btbs = `BTB_ALL_BITS`,
		bool	interpolate = `false`
	)

inline

different variants of blitting to rectangle dst_rect of this frame buffer from rectangle src_rect of source frame buffer

Definition at line 78 of file frame_buffer.h.

References blit_from().

Referenced by blit_from().

◆ blit_from() [2/6]

void cgv::render::frame_buffer::blit_from	(	context &	ctx,
		const ivec4 &	dst_rect,
		BufferTypeBits	btbs = `BTB_ALL_BITS`,
		bool	interpolate = `false`
	)

inline

Definition at line 79 of file frame_buffer.h.

◆ blit_from() [3/6]

void cgv::render::frame_buffer::blit_from	(	context &	ctx,
		const ivec4 &	dst_rect,
		const ivec4 &	src_rect,
		BufferTypeBits	btbs = `BTB_ALL_BITS`,
		bool	interpolate = `false`
	)

Definition at line 22 of file frame_buffer.cxx.

◆ blit_from() [4/6]

void cgv::render::frame_buffer::blit_from	(	context &	ctx,
		frame_buffer &	src_fbo,
		BufferTypeBits	btbs = `BTB_ALL_BITS`,
		bool	interpolate = `false`
	)

inline

Definition at line 81 of file frame_buffer.h.

◆ blit_from() [5/6]

void cgv::render::frame_buffer::blit_from	(	context &	ctx,
		frame_buffer &	src_fbo,
		const ivec4 &	dst_rect,
		BufferTypeBits	btbs = `BTB_ALL_BITS`,
		bool	interpolate = `false`
	)

inline

Definition at line 82 of file frame_buffer.h.

◆ blit_from() [6/6]

void cgv::render::frame_buffer::blit_from	(	context &	ctx,
		frame_buffer &	src_fbo,
		const ivec4 &	dst_rect,
		const ivec4 &	src_rect,
		BufferTypeBits	btbs = `BTB_ALL_BITS`,
		bool	interpolate = `false`
	)

Definition at line 27 of file frame_buffer.cxx.

◆ blit_to() [1/6]

void cgv::render::frame_buffer::blit_to	(	context &	ctx,
		BufferTypeBits	btbs = `BTB_ALL_BITS`,
		bool	interpolate = `false`
	)		const

inline

different variants of blitting rectangle src_rect of this frame buffer into rectangle dest_rect of destination frame buffer

Definition at line 71 of file frame_buffer.h.

References blit_to().

Referenced by blit_to().

◆ blit_to() [2/6]

void cgv::render::frame_buffer::blit_to	(	context &	ctx,
		const ivec4 &	src_rect,
		BufferTypeBits	btbs = `BTB_ALL_BITS`,
		bool	interpolate = `false`
	)		const

inline

Definition at line 72 of file frame_buffer.h.

◆ blit_to() [3/6]

void cgv::render::frame_buffer::blit_to	(	context &	ctx,
		const ivec4 &	src_rect,
		const ivec4 &	dst_rect,
		BufferTypeBits	btbs = `BTB_ALL_BITS`,
		bool	interpolate = `false`
	)		const

Definition at line 12 of file frame_buffer.cxx.

◆ blit_to() [4/6]

void cgv::render::frame_buffer::blit_to	(	context &	ctx,
		frame_buffer &	dst_fbo,
		BufferTypeBits	btbs = `BTB_ALL_BITS`,
		bool	interpolate = `false`
	)		const

inline

Definition at line 74 of file frame_buffer.h.

◆ blit_to() [5/6]

void cgv::render::frame_buffer::blit_to	(	context &	ctx,
		frame_buffer &	dst_fbo,
		const ivec4 &	src_rect,
		BufferTypeBits	btbs = `BTB_ALL_BITS`,
		bool	interpolate = `false`
	)		const

inline

Definition at line 75 of file frame_buffer.h.

◆ blit_to() [6/6]

void cgv::render::frame_buffer::blit_to	(	context &	ctx,
		frame_buffer &	dst_fbo,
		const ivec4 &	src_rect,
		const ivec4 &	dst_rect,
		BufferTypeBits	btbs = `BTB_ALL_BITS`,
		bool	interpolate = `false`
	)		const

Definition at line 17 of file frame_buffer.cxx.

◆ create()

bool cgv::render::frame_buffer::create	(	const context &	ctx,
		int	_width = `-1`,
		int	_height = `-1`
	)

create framebuffer if extension is supported, otherwise return false.

create framebuffer of extension is supported, otherwise return false.

The set extent is used to set the viewport in the enable method. If no extent is specified it is copied from glViewport.

Definition at line 51 of file frame_buffer.cxx.

References cgv::render::render_component::ctx_ptr, and destruct().

Referenced by vr_test::init_frame(), cgv::render::gl::gl_transparent_renderer::init_frame(), cgv::render::gl::render_to_texture3D(), and cgv::render::texture::write_to_file().

◆ destruct()

void cgv::render::frame_buffer::destruct ( const context & ctx )

destruct the framebuffer objext

Definition at line 44 of file frame_buffer.cxx.

Referenced by create(), cgv::render::gl::gl_transparent_renderer::destruct(), vr_test::init_frame(), cgv::render::gl::gl_transparent_renderer::init_frame(), and ~frame_buffer().

◆ disable()

bool cgv::render::frame_buffer::disable ( context & ctx )

disable the framebuffer object

Definition at line 183 of file frame_buffer.cxx.

Referenced by vr_test::init_frame(), cgv::render::gl::render_to_texture3D(), cgv::render::gl::gl_transparent_renderer::render_transparent(), and cgv::render::texture::write_to_file().

◆ enable() [1/2]

bool cgv::render::frame_buffer::enable	(	context &	ctx,
		int	i0 = `-1`,
		int	i1 = `-1`,
		int	i2 = `-1`,
		int	i3 = `-1`,
		int	i4 = `-1`,
		int	i5 = `-1`,
		int	i6 = `-1`,
		int	i7 = `-1`,
		int	i8 = `-1`,
		int	i9 = `-1`,
		int	i10 = `-1`,
		int	i11 = `-1`,
		int	i12 = `-1`,
		int	i13 = `-1`,
		int	i14 = `-1`,
		int	i15 = `-1`
	)

enable the framebuffer either with all color attachments if no arguments are given or if arguments are given with the indexed color attachments.

Return whether this was successful.

Definition at line 121 of file frame_buffer.cxx.

Referenced by vr_test::init_frame(), cgv::render::gl::render_to_texture3D(), cgv::render::gl::gl_transparent_renderer::render_transparent(), and cgv::render::texture::write_to_file().

◆ enable() [2/2]

bool cgv::render::frame_buffer::enable	(	context &	ctx,
		std::vector< int > &	indices
	)

enable the framebuffer either with the color attachments specified in the given vector.

Definition at line 162 of file frame_buffer.cxx.

◆ get_height()

int cgv::render::frame_buffer::get_height ( ) const

inline

return the height

Definition at line 44 of file frame_buffer.h.

Referenced by cgv::render::gl::gl_transparent_renderer::init_frame(), and push_viewport().

◆ get_max_nr_color_attachments()

int cgv::render::frame_buffer::get_max_nr_color_attachments ( const context & ctx )

static

return the maximum number of color attachments supported by the GPU

Definition at line 188 of file frame_buffer.cxx.

◆ get_max_nr_draw_buffers()

int cgv::render::frame_buffer::get_max_nr_draw_buffers ( const context & ctx )

static

return the maximum number of simultaneous draw buffers supported by the GPU

Definition at line 193 of file frame_buffer.cxx.

◆ get_width()

int cgv::render::frame_buffer::get_width ( ) const

inline

return the width

Definition at line 42 of file frame_buffer.h.

Referenced by vr_test::init_frame(), cgv::render::gl::gl_transparent_renderer::init_frame(), and push_viewport().

◆ is_complete()

bool cgv::render::frame_buffer::is_complete ( const context & ctx ) const

check for completeness, if not complete, get the reason in last_error

Definition at line 113 of file frame_buffer.cxx.

Referenced by vr_test::init_frame(), cgv::render::gl::gl_transparent_renderer::init_frame(), cgv::render::gl::render_to_texture3D(), and cgv::render::texture::write_to_file().

◆ pop_viewport()

void cgv::render::frame_buffer::pop_viewport ( context & ctx )

recover the window transformation array active before the last call to push_viewport

Definition at line 177 of file frame_buffer.cxx.

References cgv::render::context::pop_window_transformation_array().

Referenced by vr_test::init_frame().

◆ push_viewport()

void cgv::render::frame_buffer::push_viewport	(	context &	ctx,
		const dvec2 &	depth_range = `dvec2(0,1)`
	)

push a new window transformation to cover the fbo onto the window transformation stack

Definition at line 169 of file frame_buffer.cxx.

References get_height(), get_width(), cgv::render::context::push_window_transformation_array(), cgv::render::context::set_depth_range(), and cgv::render::context::set_viewport().

Referenced by vr_test::init_frame().

◆ set_height()

void cgv::render::frame_buffer::set_height ( int _height )

set a different height

Definition at line 69 of file frame_buffer.cxx.

◆ set_size()

void cgv::render::frame_buffer::set_size	(	int	_width,
		int	_height
	)

set different size

Definition at line 75 of file frame_buffer.cxx.

◆ set_width()

void cgv::render::frame_buffer::set_width ( int _width )

set a different width

Definition at line 64 of file frame_buffer.cxx.

Member Data Documentation

◆ last_error

std::string cgv::render::frame_buffer::last_error

mutable

a string that contains the last error, which is only set by the init method

Definition at line 24 of file frame_buffer.h.

Referenced by attach(), attach(), and cgv::render::texture::write_to_file().

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

cgv/render/frame_buffer.h
cgv/render/frame_buffer.cxx

Public Member Functions

Static Public Member Functions

Public Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ frame_buffer()

◆ ~frame_buffer()

Member Function Documentation

◆ attach() [1/3]

◆ attach() [2/3]

◆ attach() [3/3]

◆ blit_from() [1/6]

◆ blit_from() [2/6]

◆ blit_from() [3/6]

◆ blit_from() [4/6]

◆ blit_from() [5/6]

◆ blit_from() [6/6]

◆ blit_to() [1/6]

◆ blit_to() [2/6]

◆ blit_to() [3/6]

◆ blit_to() [4/6]

◆ blit_to() [5/6]

◆ blit_to() [6/6]

◆ create()

◆ destruct()

◆ disable()

◆ enable() [1/2]

◆ enable() [2/2]

◆ get_height()

◆ get_max_nr_color_attachments()

◆ get_max_nr_draw_buffers()

◆ get_width()

◆ is_complete()

◆ pop_viewport()

◆ push_viewport()

◆ set_height()

◆ set_size()

◆ set_width()

Member Data Documentation

◆ last_error