8c54b0b7e3
Legacy SwiftShader GL is deprecated, so remove it from existing documentation, so that only SwANGLE related documentation remains. Bug: chromium:1060139 Change-Id: I1a59d7b4a57f80cbe627df0a77430450296df607 Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3452836 Reviewed-by: Kenneth Russell <kbr@chromium.org> Commit-Queue: Alexis Hétu <sugoi@google.com> Cr-Commit-Position: refs/heads/main@{#969936}
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Using Chromium with SwiftShader
SwiftShader is an open-source high-performance implementation of the Vulkan and OpenGL ES graphics APIs which runs purely on the CPU. Thus no graphics processor (GPU) is required for advanced (3D) graphics.
Chromium uses SwiftShader in two different ways:
- As the OpenGL ES driver
When Chromium uses SwiftShader as the OpenGL ES driver, Chromium behaves as if it was running a on regular GPU, while actually running on SwiftShader. This allows Chromium to exercise hardware only code paths on GPU-less bots.
- As the WebGL fallback
When Chromium uses SwiftShader as the WebGL fallback, Chromium runs in all software mode and only uses SwiftShader to render WebGL content.
Relevant Chromium command line switches
When running the chrome executable from the command line, SwiftShader can be enabled using the following Switches:
- As the OpenGL ES driver, SwANGLE (ANGLE + SwiftShader Vulkan)
--use-gl=angle --use-angle=swiftshader
- As the WebGL fallback, SwANGLE (ANGLE + SwiftShader Vulkan)
--use-gl=angle --use-angle=swiftshader-webgl
- As the Vulkan driver (requires the enable_swiftshader_vulkan feature)
--use-vulkan=swiftshader