oe::render::Framebuffer Class Reference

#include <OxygenEngine/render/framebuffer.h>

Public Member Functions
	Framebuffer (const glm::ivec2 &dimensions)
	Framebuffer (const uint32_t width, const uint32_t height)
std::shared_ptr< Texture >	addColorAttachment (const uint32_t attachment_level=0, const uint32_t internal_format=0, const uint32_t format=0, const uint32_t type=0, const uint32_t filter=0, const uint8_t max_mips=1)
void	addDepthAttachment (const uint32_t format=0, const uint32_t type=0, const uint32_t filter=0)
void	setDepthAttachment (std::shared_ptr< Texture > texture)
void	setTextureAttachment (const uint32_t attachment_level, std::shared_ptr< Texture > texture, const int32_t mip_level=0)
void	clearContents (const glm::vec4 &color=glm::vec4(0.f), const int &target=0)
void	beginRender (const bool resize_viewport=true)
void	endRender ()
	operator bool ()
const std::shared_ptr< Texture > &	getColorAttachment (const uint32_t attachment_level) const
const std::shared_ptr< Texture > &	getDepthAttachment () const
void	blitFrom (const Framebuffer *src, const glm::ivec4 &src_bounds=glm::ivec4(0), const glm::ivec4 &target_bounds=glm::ivec4(0), const TargetBuffer &type=TargetBuffer::ALL, const uint8_t color_attachment_src=0, const uint8_t color_attachment_dest=0, const bool usefilter=false)
void	blitTo (Framebuffer *target, const glm::ivec4 &src_bounds=glm::ivec4(0), const glm::ivec4 &target_bounds=glm::ivec4(0), const TargetBuffer &type=TargetBuffer::ALL, const uint8_t color_attachment_src=0, const uint8_t color_attachment_dest=0, const bool usefilter=false) const
void	copyFrom (Framebuffer *source, const TargetBuffer &type=TargetBuffer::ALL)
void	blitToDefault (const uint8_t color_attachment_src=0, const bool &usefilter=false) const
glm::ivec2	getDimensions () const noexcept

Detailed Description

Wrapper around framebuffer operations

Example usage:

Framebuffer fb(800, 600);
fb.addColorAttachment(0);
fb.addDepthAttachment();
 
// Ensure framebuffer is valid
assert(fb);
 
fb.beginRender();
    // Clear color and depth buffers (example, set the background to grey)
    fb.clearContents(glm::vec4(glm::vec3(0.5), 1.0));
 
    // Your other OpenGL render calls
    ...
fb.endRender();

Member Function Documentation

addColorAttachment()

std::shared_ptr< Texture > oe::render::Framebuffer::addColorAttachment	(	const uint32_t	attachment_level = 0,
		const uint32_t	internal_format = 0,
		const uint32_t	format = 0,
		const uint32_t	type = 0,
		const uint32_t	filter = 0,
		const uint8_t	max_mips = 1
	)

Generate a color texture to the framebuffer

Parameters

attachment_level

the attachment level to use

addDepthAttachment()

void oe::render::Framebuffer::addDepthAttachment	(	const uint32_t	format = 0,
		const uint32_t	type = 0,
		const uint32_t	filter = 0
	)

Generate a depth attachment to the framebuffer

Note

If no parameters provided, a renderbuffer will be generated instead a texture (the rbo is more optimized but you won't be able to sample it)

beginRender()

void oe::render::Framebuffer::beginRender

(

const bool

resize_viewport = true

)

Begin rendering operations on this framebuffer

blitFrom()

void oe::render::Framebuffer::blitFrom	(	const Framebuffer *	src,
		const glm::ivec4 &	src_bounds = glm::ivec4(0),
		const glm::ivec4 &	target_bounds = glm::ivec4(0),
		const TargetBuffer &	type = TargetBuffer::ALL,
		const uint8_t	color_attachment_src = 0,
		const uint8_t	color_attachment_dest = 0,
		const bool	usefilter = false
	)

Copy a portion of a framebuffer to this one

Parameters

src	source framebuffer to get blit data
src_bounds	blit source bounds (from src)
target_bounds	blit target bounds (on this one)
type	a TargetBuffer target to copy
color_attachment_src	If type contains the color buffer, src attachment layer to fetch
color_attachment_dest	If type contains the color buffer, this framebuffer attachment layer to write
usefilter	If bounds are not the same size, do we need to use a linear filter

blitTo()

void oe::render::Framebuffer::blitTo	(	Framebuffer *	target,
		const glm::ivec4 &	src_bounds = glm::ivec4(0),
		const glm::ivec4 &	target_bounds = glm::ivec4(0),
		const TargetBuffer &	type = TargetBuffer::ALL,
		const uint8_t	color_attachment_src = 0,
		const uint8_t	color_attachment_dest = 0,
		const bool	usefilter = false
	)		const

Copy a portion of this framebuffer to another one

Parameters

target	target framebuffer to blit data
src_bounds	blit source bounds (from this one)
target_bounds	blit target bounds (on target)
type	TargetBuffer target to copy
color_attachment_src	If type contains the color buffer, this attachment layer to fetch
color_attachment_dest	If type contains the color buffer, target framebuffer attachment layer to write
usefilter	If bounds are not the same size, do we need to use a linear filter

blitToDefault()

void oe::render::Framebuffer::blitToDefault	(	const uint8_t	color_attachment_src = 0,
		const bool &	usefilter = false
	)		const

Handy function to copy this framebuffer to default framebuffer

Parameters

color_attachment_src	Attachment layer to fetch
usefilter	If bounds are not the same size, do we need to use a linear filter

clearContents()

void oe::render::Framebuffer::clearContents	(	const glm::vec4 &	color = glm::vec4(0.f),
		const int &	target = 0
	)

Clear the framebuffer contents with a color

copyFrom()

void oe::render::Framebuffer::copyFrom ( Framebuffer *  source, const TargetBuffer &  type = TargetBuffer::ALL  )

inline

Copy all contents from source

Parameters

source	Source framebuffer to get blit data
type	TargetBuffer target to copy

endRender()

void oe::render::Framebuffer::endRender

(

)

End rendering operations on this framebuffer

getColorAttachment()

const std::shared_ptr< Texture > & oe::render::Framebuffer::getColorAttachment ( const uint32_t  attachment_level ) const

inline

Get the color attachment texture

Parameters

attachment_level

the attachment level to fetch (if not multitexturing used, set it to 0)

getDepthAttachment()

const std::shared_ptr< Texture > & oe::render::Framebuffer::getDepthAttachment ( ) const

inline

Get the depth attachment texture

Note

nullptr returned if the framebuffer doesn't have depth or depth created with a renderbuffer

getDimensions()

glm::ivec2 oe::render::Framebuffer::getDimensions ( ) const

inlinenoexcept

Get Framebuffer dimensions

operator bool()

oe::render::Framebuffer::operator bool

(

)

Check if the framebuffer is valid

setDepthAttachment()

void oe::render::Framebuffer::setDepthAttachment

(

std::shared_ptr< Texture >

texture

)

Add a existing texture as the depth framebuffer

setTextureAttachment()

void oe::render::Framebuffer::setTextureAttachment	(	const uint32_t	attachment_level,
		std::shared_ptr< Texture >	texture,
		const int32_t	mip_level = 0
	)

Add a existing texture to the framebuffer

Parameters

attachment_level	the attachment level to use (if not multitexturing used, set it to 0)
texture	the texture to use
mip_level	MIP MAP level of texture

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

• OxygenEngine/render/framebuffer.h