kc3-lang/angle

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  • Hash : 29bb612e
    Author : Charlie Lao
    Date : 2020-05-28T10:32:26 

    Add egl::ShareGroup class to abstract the share context group

Vulkan backend has a barrier tracker that tracks memory barrier needs of
all shared resources. Because the buffer/texture objects are shared
resources within a shared group, the tracker can not live in a context.
Putting it in a device/renderer requires locks. It fits perfectly in a
shareGroup object. The work is already done at API level to handle the
mutex lock for shared context access so that no extra lock needs to be
taken in the backend. This CL adds egl::ShareGroup class that represents
the object that are shared among all share context group. At the front
end this usually will include all the shared resource managers (not done
in this CL). The ShareGroup object is accessible from gl::State object.
This CL also adds ability for backend driver to allocate implementation
specific ShareGroupImpl object. Vulkan backend will then use it to keeps
the barrier tracker and other things that naturally fits the share group
concept.

Bug: angleproject:4664
Change-Id: Ifcd975cbdf5130022e21c41397894afc28f572e7
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2217252
Reviewed-by: Courtney Goeltzenleuchter <courtneygo@google.com>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Charlie Lao <cclao@google.com>

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    Git SSH git@git.kmx.io:kc3-lang/angle.git
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    Description

    A conformant OpenGL ES implementation for Windows, Mac, Linux, iOS and Android.

    Homepage

    Github
    Users
    		 kc3_lang_org thodg_w www_kmx_io thodg_l thodg thodg_m
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  • README.md

  • ANGLE - Almost Native Graphics Layer Engine

    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, 3.0 and 3.1 to Vulkan, desktop OpenGL, OpenGL ES, Direct3D 9, and Direct3D 11. Future plans include ES 3.2, translation to Metal and MacOS, Chrome OS, and Fuchsia support.

    Level of OpenGL ES support via backing renderers

    Direct3D 9 Direct3D 11 Desktop GL GL ES Vulkan Metal
    OpenGL ES 2.0 complete complete complete complete complete in progress
    OpenGL ES 3.0 complete complete complete complete
    OpenGL ES 3.1 in progress complete complete in progress
    OpenGL ES 3.2 in progress in progress in progress

    Platform support via backing renderers

    Direct3D 9 Direct3D 11 Desktop GL GL ES Vulkan Metal
    Windows complete complete complete complete complete
    Linux complete complete
    Mac OS X complete in progress
    iOS planned
    Chrome OS complete planned
    Android complete complete
    Fuchsia in progress

    ANGLE v1.0.772 was certified compliant by passing the ES 2.0.3 conformance tests in October 2011. With the Vulkan backend, ANGLE 2.1.0.d46e2fb1e341 was certified compliant to ES 2.0 in Nov 2019, and ANGLE 2.1.0.f18ff947360d to ES 3.0 in Feb 2020. 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, Vulkan GLSL, Direct3D HLSL, and even ESSL for native GLES2 platforms.

    Sources

    ANGLE repository is hosted by Chromium project and can be browsed online or cloned with

    git clone https://chromium.googlesource.com/angle/angle

    Building

    View the Dev setup instructions.

    Contributing

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