Performs deferred rendering of a scene. More...

#include <DeferredRenderer.hpp>

Public Member Functions
	DeferredRenderer (const glm::vec2 &resolution, bool ssao, const std::string &name)

void	setScene (const std::shared_ptr< Scene > &scene)

void	draw (const Camera &camera, Texture dstColor, Texture dstDepth, uint layer=0) override

void	resize (uint width, uint height) override

void	interface () override

Texture &	sceneDepth ()

Public Member Functions inherited from Renderer
	Renderer (const std::string &name)

virtual void	draw (const Camera &camera, Texture dstColor, Texture dstDepth, uint layer=0)

virtual void	resize (uint width, uint height)

virtual void	interface ()

virtual	~Renderer ()=default

	Renderer (const Renderer &)=delete

Renderer &	operator= (const Renderer &)=delete

	Renderer (Renderer &&)=delete

Renderer &	operator= (Renderer &&)=delete

Layout	outputColorFormat () const

Layout	outputDepthFormat () const

Private Member Functions
void	renderOpaque (const Culler::List &visibles, const glm::mat4 &view, const glm::mat4 &proj)

void	renderTransparent (const Culler::List &visibles, const glm::mat4 &view, const glm::mat4 &proj)

void	renderBackground (const glm::mat4 &view, const glm::mat4 &proj, const glm::vec3 &pos)

Private Attributes
Texture	_sceneAlbedo
	Scene albedo.

Texture	_sceneNormal
	Scene normals.

Texture	_sceneEffects
	Scene material parameters.

Texture	_sceneDepth
	Scene depth.

Texture	_lighting
	Lighting accumulation.

Texture	_indirectLighting
	Indirect lighting accumulation.

Texture	_depthCopy
	Lighting detph copy.

std::unique_ptr< SSAO >	_ssaoPass
	SSAO processing.

std::unique_ptr< DeferredLight >	_lightRenderer
	The lights renderer.

std::unique_ptr< DeferredProbe >	_probeRenderer
	The probes renderer.

std::unique_ptr< ForwardLight >	_fwdLightsGPU
	The lights forward renderer for transparent objects.

std::unique_ptr< ForwardProbe >	_fwdProbesGPU
	The probes forward renderer for transparent objects.

Program *	_objectProgram
	Basic PBR program.

Program *	_parallaxProgram
	Parallax mapping PBR program.

Program *	_clearCoatProgram
	Basic PBR program with an additional clear coat specular layer.

Program *	_anisotropicProgram
	Basic PBR with anisotropic roughness.

Program *	_sheenProgram
	PBR with sheen BRDF.

Program *	_iridescentProgram
	PBR with iridescent Fresnel.

Program *	_subsurfaceProgram
	PBR with subsurface scattering.

Program *	_emissiveProgram
	Emissive program.

Program *	_transparentProgram
	Transparent PBR program.

Program *	_transpIridProgram
	Transparent PBR with iridescent Fresnel program.

Program *	_probeNormalization
	Indirect lighting normalization program.

Program *	_skyboxProgram
	Skybox program.

Program *	_bgProgram
	Planar background program.

Program *	_atmoProgram
	Atmospheric scattering program.

const Texture *	_textureBrdf
	The BRDF lookup table.

std::shared_ptr< Scene >	_scene
	The scene to render.

std::unique_ptr< Culler >	_culler
	Objects culler.

bool	_applySSAO = true
	Screen space ambient occlusion.

Additional Inherited Members
Protected Attributes inherited from Renderer
std::string	_name
	Debug name.

Layout	_colorFormat = Layout::NONE
	The preferred output format for a given renderer.

Layout	_depthFormat = Layout::NONE
	The preferred output format for a given renderer.

Detailed Description

Performs deferred rendering of a scene.

See also: DeferredLight, DeferredProbe, Material, GPUShaders::Common::Common_pbr

Objects material information is renderer in a G-buffer, packing the various parameters as efficiently as possible in a fixed number of texture channels. As many components as possible are reused between materials, and the precision of some parameters is lowered. See the Material class documentation for all parameter details.

Shared section:

	_______Red‏‏‎_______	______Alpha______
0: RGBA8	Albedo/reflectance/emissive color	Material ID
1: RGB10A2	Normal octahedral XY
2: RGBA8

Standard (& Parallax):

	_______Red‏‏‎_______	______Green______	_______Blue______	______Alpha______
1: RGB10A2
2: RGBA8	Roughness	Metalness(5)	Ambient occlusion

See also: GPUShaders::Frag::Object_gbuffer, GPUShaders::Frag::Object_parallax_gbuffer

Clearcoat:

	_______Red‏‏‎_______	______Green______	_______Blue______	______Alpha______
1: RGB10A2
2: RGBA8	Roughness	Metal(5) Coating(3)	Ambient occlusion	Coat roughness

See also: GPUShaders::Frag::Object_clearcoat_gbuffer

Anisotropic:

	_______Red‏‏‎_______	______Green______	_______Blue______	______Alpha______
1: RGB10A2			Anisotropy angle	Anisotropy signs
2: RGBA8	Roughness	Metalness(5)	Ambient occlusion	Anisotropy

See also: GPUShaders::Frag::Object_anisotropic_gbuffer

Sheen:

	_______Red‏‏‎_______	______Green______	_______Blue______	______Alpha______
1: RGB10A2			Sheen color (3*4)
2: RGBA8	Roughness	Sheeness(5)	Ambient occlusion	Sheen roughness

See also: GPUShaders::Frag::Object_sheen_gbuffer

Iridescent:

	_______Red‏‏‎_______	______Green______	_______Blue______	______Alpha______
1: RGB10A2			Index of refraction
2: RGBA8	Roughness	Metalness(5)	Ambient occlusion	Thickness

See also: GPUShaders::Frag::Object_iridescent_gbuffer

Subsurface:

	_______Red‏‏‎_______	______Green______	_______Blue______	______Alpha______
1: RGB10A2			Subsurface color (3*4)
2: RGBA8	Roughness	Subsurf rough(5)	Ambient occlusion	Thickness

See also: GPUShaders::Frag::Object_subsurface_gbuffer

Emissive:

	_______Red‏‏‎_______	______Green______	_______Blue______	______Alpha______
1: RGB10A2			Roughness
2: RGBA8	Emissive intensity

See also: GPUShaders::Frag::Object_emissive_gbuffer

The G-buffer is then read by each light, rendered as a geometric proxy onto the scene depth buffer and writing its lighting contribution to a lighting buffer. Ambient probes are processed similarly. Direct and ambient lighting are finally merged to generate the final image.

Transparent objects are rendered in a forward pass.

See also: GPUShaders::Frag::Object_transparent_forward, GPUShaders::Frag::Object_transparent_irid_forward

Inherits Renderer.

Constructor & Destructor Documentation

◆ DeferredRenderer()

DeferredRenderer::DeferredRenderer	(	const glm::vec2 &	resolution,
		bool	ssao,
		const std::string &	name
	)

explicit

Constructor.

Parameters

resolution	the initial rendering resolution
ssao	should screen space ambient occlusion be computed
name	the debug name

Member Function Documentation

◆ draw()

void DeferredRenderer::draw	(	const Camera &	camera,
		Texture *	dstColor,
		Texture *	dstDepth,
		uint	layer = `0`
	)

overridevirtual

Draw from a given viewpoint.

Parameters

camera	the rendering viewpoint
dstColor	the destination color texture (optional, see outputColorFormat)
dstDepth	the destination depth texture (optional, see outputDepthFormat)
layer	the layer to write to in the target

Reimplemented from Renderer.

◆ interface()

void DeferredRenderer::interface ( )

overridevirtual

Display GUI exposing renderer options.

Note: The renderer can assume that a GUI window is currently open.

Reimplemented from Renderer.

◆ renderBackground()

void DeferredRenderer::renderBackground	(	const glm::mat4 &	view,
		const glm::mat4 &	proj,
		const glm::vec3 &	pos
	)

private

Render the scene background to the G-buffer.

Parameters

view	the camera view matrix
proj	the camera projection matrix
pos	the camera position

◆ renderOpaque()

void DeferredRenderer::renderOpaque	(	const Culler::List &	visibles,
		const glm::mat4 &	view,
		const glm::mat4 &	proj
	)

private

Render the scene opaque objects.

Parameters

visibles	list of indices of visible objects
view	the camera view matrix
proj	the camera projection matrix

◆ renderTransparent()

void DeferredRenderer::renderTransparent	(	const Culler::List &	visibles,
		const glm::mat4 &	view,
		const glm::mat4 &	proj
	)

private

Render the scene transparent objects.

Parameters

visibles	list of indices of visible objects
view	the camera view matrix
proj	the camera projection matrix

◆ resize()

void DeferredRenderer::resize	(	uint	width,
		uint	height
	)

overridevirtual

Handle a window resize event.

Parameters

width	the new width
height	the new height

Reimplemented from Renderer.

◆ sceneDepth()

Texture & DeferredRenderer::sceneDepth ( )

Returns: the texture containing the scene depth information

◆ setScene()

void DeferredRenderer::setScene ( const std::shared_ptr< Scene > & scene )

Set the scene to render.

Parameters

scene the new scene

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

src/apps/pbrdemo/DeferredRenderer.hpp
src/apps/pbrdemo/DeferredRenderer.cpp

Public Member Functions

Private Member Functions

Private Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ DeferredRenderer()

Member Function Documentation

◆ draw()

◆ interface()

◆ renderBackground()

◆ renderOpaque()

◆ renderTransparent()

◆ resize()

◆ sceneDepth()

◆ setScene()