#include <GaussianSplatRenderer.h>

Data Structures
class	Backend
	GPU backend for geometry + composite compute (OpenGL or Metal). More...

struct	OutputTargets

struct	RenderConfig
	Tunable knobs for the compute pipeline, set once at construction. More...

struct	ViewRenderData
	Camera and viewport state extracted per-view each geometry pass. More...

Public Member Functions
	GaussianSplatRenderer (filament::Engine &engine, FilamentResourceManager &resource_mgr)

	~GaussianSplatRenderer ()

void	BeginFrame ()

void	RenderGeometryStage (FilamentView &view, const FilamentScene &scene)

bool	RenderCompositeStage (FilamentView &view)
	Returns true if the composite pass ran and the backend reported success. More...

void	PruneOutputs (const std::unordered_set< const FilamentView * > &live_views)

void	InvalidateOutputForView (FilamentView &view)

void	RequestRedrawForView (const FilamentView &view)

bool	IsEnabled () const

void	SetEnabled (bool enabled)

bool	IsSupported () const

bool	HasOutput (const FilamentView &view) const

TextureHandle	GetColorTexture (const FilamentView &view) const

TextureHandle	GetDepthTexture (const FilamentView &view) const

RenderTargetHandle	GetColorReadbackRT (const FilamentView &view) const

bool	ReadMergedDepthToUint16Cpu (const FilamentView &view, std::vector< std::uint16_t > &out, std::uint32_t width, std::uint32_t height)

bool	ReadCompositeDepthToFloatCpu (const FilamentView &view, std::vector< float > &out, std::uint32_t width, std::uint32_t height)

void	RequestDepthReadbackForView (const FilamentView &view, bool wanted=true)

std::uint32_t	GetSceneDepthGLHandle (const FilamentView &view) const

const ViewRenderData *	GetViewRenderData (const FilamentView &view) const

const RenderConfig &	GetRenderConfig () const

void	SetRenderConfig (const RenderConfig &config)

const char *	GetBackendName () const

Detailed Description

Manages per-view GPU output targets, backend lifetime, and frame orchestration for the Gaussian splat compute pipeline. One instance lives inside FilamentRenderer and FilamentRenderToBuffer.

Constructor & Destructor Documentation

◆ GaussianSplatRenderer()

open3d::visualization::rendering::GaussianSplatRenderer::GaussianSplatRenderer	(	filament::Engine &	engine,
		FilamentResourceManager &	resource_mgr
	)

◆ ~GaussianSplatRenderer()

open3d::visualization::rendering::GaussianSplatRenderer::~GaussianSplatRenderer ( )

Member Function Documentation

◆ BeginFrame()

void open3d::visualization::rendering::GaussianSplatRenderer::BeginFrame ( )

◆ GetBackendName()

const char * open3d::visualization::rendering::GaussianSplatRenderer::GetBackendName ( ) const

◆ GetColorReadbackRT()

RenderTargetHandle open3d::visualization::rendering::GaussianSplatRenderer::GetColorReadbackRT ( const FilamentView & view ) const

Returns a color-only render target suitable for readPixels readback. Only valid after RenderCompositeStage has been called for this view.

◆ GetColorTexture()

TextureHandle open3d::visualization::rendering::GaussianSplatRenderer::GetColorTexture ( const FilamentView & view ) const

◆ GetDepthTexture()

TextureHandle open3d::visualization::rendering::GaussianSplatRenderer::GetDepthTexture ( const FilamentView & view ) const

◆ GetRenderConfig()

const GaussianSplatRenderer::RenderConfig & open3d::visualization::rendering::GaussianSplatRenderer::GetRenderConfig ( ) const

◆ GetSceneDepthGLHandle()

std::uint32_t open3d::visualization::rendering::GaussianSplatRenderer::GetSceneDepthGLHandle ( const FilamentView & view ) const

Returns the GL texture handle for the scene depth texture that Filament should render into (shared via import).

◆ GetViewRenderData()

const GaussianSplatRenderer::ViewRenderData * open3d::visualization::rendering::GaussianSplatRenderer::GetViewRenderData ( const FilamentView & view ) const

◆ HasOutput()

bool open3d::visualization::rendering::GaussianSplatRenderer::HasOutput ( const FilamentView & view ) const

◆ InvalidateOutputForView()

void open3d::visualization::rendering::GaussianSplatRenderer::InvalidateOutputForView ( FilamentView & view )

Destroys GS output targets for a specific view immediately, clearing the view's render target first. Must be called before any Filament texture used as an attachment is freed (e.g. on window resize before FilamentView::color_buffer_ is destroyed) to prevent a use-after-free crash in Filament's handle validation.

◆ IsEnabled()

bool open3d::visualization::rendering::GaussianSplatRenderer::IsEnabled ( ) const

◆ IsSupported()

bool open3d::visualization::rendering::GaussianSplatRenderer::IsSupported ( ) const

◆ PruneOutputs()

void open3d::visualization::rendering::GaussianSplatRenderer::PruneOutputs ( const std::unordered_set< const FilamentView * > & live_views )

◆ ReadCompositeDepthToFloatCpu()

bool open3d::visualization::rendering::GaussianSplatRenderer::ReadCompositeDepthToFloatCpu	(	const FilamentView &	view,
		std::vector< float > &	out,
		std::uint32_t	width,
		std::uint32_t	height
	)

Read the GS composite depth (R32F, linear eye-space) into out when no scene depth (mesh) is present and the merge pass was skipped.

◆ ReadMergedDepthToUint16Cpu()

bool open3d::visualization::rendering::GaussianSplatRenderer::ReadMergedDepthToUint16Cpu	(	const FilamentView &	view,
		std::vector< std::uint16_t > &	out,
		std::uint32_t	width,
		std::uint32_t	height
	)

Read the GPU-merged GS+Filament depth (R16UI, [0,65535]) into out for offscreen RenderToDepthImage. Returns false when no merged depth texture exists for this view.

◆ RenderCompositeStage()

bool open3d::visualization::rendering::GaussianSplatRenderer::RenderCompositeStage ( FilamentView & view )

Returns true if the composite pass ran and the backend reported success.

◆ RenderGeometryStage()

void open3d::visualization::rendering::GaussianSplatRenderer::RenderGeometryStage	(	FilamentView &	view,
		const FilamentScene &	scene
	)

◆ RequestDepthReadbackForView()

void open3d::visualization::rendering::GaussianSplatRenderer::RequestDepthReadbackForView	(	const FilamentView &	view,
		bool	wanted = `true`
	)

Signal that an offscreen depth readback is needed for view in the next composite pass. Causes the merged_depth_u16_tex to be allocated only when a scene-depth texture is also available.

◆ RequestRedrawForView()

void open3d::visualization::rendering::GaussianSplatRenderer::RequestRedrawForView ( const FilamentView & view )

Marks the view so the next geometry + composite passes run even if the scene and camera are unchanged. Used by offscreen FilamentRenderToBuffer captures: without this, needs_render stays false after the first composite and subsequent RenderToImage calls would skip the GS pipeline and read only the Filament swapchain (no splats).

◆ SetEnabled()

void open3d::visualization::rendering::GaussianSplatRenderer::SetEnabled ( bool enabled )

◆ SetRenderConfig()

void open3d::visualization::rendering::GaussianSplatRenderer::SetRenderConfig ( const RenderConfig & config )

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

/root/Open3D/cpp/open3d/visualization/rendering/gaussian_splat/GaussianSplatRenderer.h
/root/Open3D/cpp/open3d/visualization/rendering/gaussian_splat/GaussianSplatRenderer.cpp

Data Structures

Public Member Functions