commit | 62742f9e39e3fbd9bb4f9c3a49f04f7ac6db7080 | [log] [tgz] |
---|---|---|
author | Shahbaz Youssefi <syoussefi@chromium.org> | Wed May 01 20:14:50 2019 |
committer | Commit Bot <commit-bot@chromium.org> | Sat May 04 03:46:47 2019 |
tree | 31900e011ed509a3b12f53411ada0768f324dac9 | |
parent | be394bada84e08e28aa208ef9c9368ab1d676682 [diff] |
Vulkan: Optimize shader source macro replacement @@ LAYOUT-xx @@ and @@ QUALIFIER-xx @@ macros are generated by the compiler when emitting Vulkan GLSL. These macros are replaced at link time in the Vulkan backend. Previously, this replacement was done through calls to angle::ReplaceSubstring, reiterating over the whole source on every replacement. This CL does a prepass on the input source and chunks it up in blocks. Search is optimized as only blocks of a certain type are string-compared (skipping large chunks of shader text). Replace is optimized as the whole shader is not shifted left or right on every replacement. Additionally, this CL modifies the layout macro to the following format: @@ LAYOUT-xx(extra, args) @@ This is used in a follow up CL to have the compiler provide additional layout qualifiers. Bug: angleproject:3220 Change-Id: I6367e781c3304d5f2e0a406e4fb4e6feb4c45f1d Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1592070 Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org> Reviewed-by: Jamie Madill <jmadill@chromium.org> Reviewed-by: Yuly Novikov <ynovikov@chromium.org>
The goal of ANGLE is to allow users of multiple operating systems to seamlessly run WebGL and other OpenGL ES content by translating OpenGL ES API calls to one of the hardware-supported APIs available for that platform. ANGLE currently provides translation from OpenGL ES 2.0 and 3.0 to desktop OpenGL, OpenGL ES, Direct3D 9, and Direct3D 11. Support for translation from OpenGL ES to Vulkan is underway, and future plans include compute shader support (ES 3.1) and MacOS support.
Direct3D 9 | Direct3D 11 | Desktop GL | GL ES | Vulkan | |
---|---|---|---|---|---|
OpenGL ES 2.0 | complete | complete | complete | complete | in progress |
OpenGL ES 3.0 | complete | complete | in progress | not started | |
OpenGL ES 3.1 | not started | in progress | in progress | not started |
Direct3D 9 | Direct3D 11 | Desktop GL | GL ES | Vulkan | |
---|---|---|---|---|---|
Windows | complete | complete | complete | complete | in progress |
Linux | complete | in progress | |||
Mac OS X | in progress | ||||
Chrome OS | complete | planned | |||
Android | complete | in progress |
ANGLE v1.0.772 was certified compliant by passing the ES 2.0.3 conformance tests in October 2011. ANGLE also provides an implementation of the EGL 1.4 specification.
ANGLE is used as the default WebGL backend for both Google Chrome and Mozilla Firefox on Windows platforms. Chrome uses ANGLE for all graphics rendering on Windows, including the accelerated Canvas2D implementation and the Native Client sandbox environment.
Portions of the ANGLE shader compiler are used as a shader validator and translator by WebGL implementations across multiple platforms. It is used on Mac OS X, Linux, and in mobile variants of the browsers. Having one shader validator helps to ensure that a consistent set of GLSL ES shaders are accepted across browsers and platforms. The shader translator can be used to translate shaders to other shading languages, and to optionally apply shader modifications to work around bugs or quirks in the native graphics drivers. The translator targets Desktop GLSL, Direct3D HLSL, and even ESSL for native GLES2 platforms.
ANGLE repository is hosted by Chromium project and can be browsed online or cloned with
git clone https://chromium.googlesource.com/angle/angle
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