# google/swiftshader

SwiftShader is a high-performance CPU-based implementation of the Vulkan graphics API. Its goal is to provide hardware independence for advanced 3D graphics.

Repository: https://github.com/google/swiftshader
Canonical: https://ross.abutalabs.com/products/swiftshader
Language: C++
License: Apache-2.0
License Family: permissive
Last push: 2026-08-26T18:13:48+00:00

## Health v2 (maintenance only)
Score: 77/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 35, longevity 100
- inputs: {"age_days": 3716, "days_push": 7, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 2533, forks 334 (observed 2026-08-28T04:06:59.040001+00:00)

## What it is
SwiftShader is a high-performance CPU-based implementation of the Vulkan 1.3 graphics API, acting as a drop-in replacement for GPU drivers. It provides hardware independence for advanced 3D graphics, and can be layered with ANGLE to support OpenGL ES 3.1.

## Use cases
- run Vulkan applications on machines without a GPU
- test 3D graphics code in CI without graphics hardware
- render 3D graphics in headless server environments
- provide a software fallback renderer for Vulkan apps
- develop and debug Vulkan drivers or applications
- run Chrome or Android graphics stacks without a GPU

## When to choose
- you need Vulkan support on hardware without a compatible GPU
- you want deterministic, hardware-independent rendering for testing
- you need a drop-in software Vulkan ICD for CI or headless servers

## When to avoid
- you need maximum rendering performance for production games or real-time graphics on capable GPUs
- you need OpenGL or Direct3D support directly without layering through ANGLE
- you need a lightweight 2D-only software rasterizer

## Facets
- artifact type: library
- maturity: active
- function: graphics, simulation
- domain: graphics, developer-tools
- platform: windows, cpp
- tags: vulkan, cpu-rendering, software-renderer, icd, 3d-graphics, gpu-emulation, game-development, linux, macos, android

## Member repositories
- google/swiftshader (main) score 77

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:06:59.040001+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T02:25:16.535618+00:00, confidence not recorded.
  - readme: https://github.com/google/swiftshader (fetched 2026-08-28T04:06:59.040001+00:00, sha 215871b66e56)
- Data as of 2026-08-30T08:39:29.467469+00:00.