donner::geode::GeodeDevice::SceneBatchBindGroupKey Struct Reference

Key identifying a scene-batch bind group by its exact buffer bindings: the shared batch uniform allocation, the geometry slab chunk, and the record span. More...

#include "donner/svg/renderer/geode/GeodeDevice.h"

Public Attributes
uint64_t	uniformBufferId = 0
	Identity of the batch uniform buffer.
uint64_t	uniformOffset = 0
	Byte offset of the uniform binding.
uint64_t	uniformSize = 0
	Byte length of the uniform binding.
uint64_t	chunkBufferId = 0
	Identity of the encoded geometry chunk buffer.
uint64_t	chunkBytes = 0
	Byte length of the bound geometry chunks.
uint64_t	recordBufferId = 0
	Identity of the scene-record buffer.
uint64_t	recordOffset = 0
	Byte offset of the scene-record binding.
uint64_t	recordBytes = 0
	Byte length of the scene-record binding.

Friends
bool	operator== (const SceneBatchBindGroupKey &a, const SceneBatchBindGroupKey &b)=default
	Compare all members for value equality.
bool	operator< (const SceneBatchBindGroupKey &a, const SceneBatchBindGroupKey &b)
	Order binding keys lexicographically for cache lookup.

Detailed Description

Key identifying a scene-batch bind group by its exact buffer bindings: the shared batch uniform allocation, the geometry slab chunk, and the record span.

The dummy texture/sampler bindings are device-owned singletons, so they never contribute to the key.

Scene batches bind pooled arena and slab buffers whose identities and offsets are stable across steady-state frames, so a cached bind group keyed this way is reusable frame over frame (keeping the per-frame bind-group create count flat; the GeodePerf ceilings pin this).

Buffers are identified by the process-unique ids handed out by AllocateBufferId(), rather than a backend handle address that may be recycled when a document releases its slab. A device outlives the documents drawn on it, so an address reused by another document must never retrieve the previous document's cached bind group.

Friends And Related Symbol Documentation

operator<

bool operator< ( const SceneBatchBindGroupKey & a, const SceneBatchBindGroupKey & b )

friend

Order binding keys lexicographically for cache lookup.

Parameters

a	Value to compare.
b	Value to compare.

operator==

bool operator== ( const SceneBatchBindGroupKey & a, const SceneBatchBindGroupKey & b )

friend

Compare all members for value equality.

Parameters

a	Value to compare.
b	Value to compare.

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

• donner/svg/renderer/geode/GeodeDevice.h