kc3-lang/angle

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  • Hash : 56aee5d6
    Author : Lubosz Sarnecki
    Date : 2021-12-10T12:32:58 

    Reland "system_utils: Add memory protection functionality."

This is a reland of b1c703e5f5e44514e8db958a5fb39ff16e514fd8
that was reverted in 663831aa676c59829cc3d822340812f016bf77f6.

Skip PageFaultHandlerProtect and PageFaultHandlerDefaultHandler on macOS
and Fuchsia.

Original change's description:
> Reland "system_utils: Add memory protection functionality."
>
> This is a reland of ab75a90ff4ecb9d99b5c72bde92222b07c285401
> that was reverted in b007e667a8f94b47788a5ba0b2e61c9ac2d1285f.
>
> Implement PageFaultHandler and memory protection functions.
> Uses mprotect and sigaction on POSIX and equivalent Win API functions on
> win32.
>
> Add tests to system_utils_unittests.
>
> Add stubs for winuwp.
>
> Replace ASSERT with ASSERT_TRUE in the PageFaultHandlerDefaultHandler
> test to make it succeed on release builds, as the code was optimized
> out. Furthermore the test did not correctly remove protection from the
> whole area it protected, which caused a hang after deinitialization on
> some build configurations, since the custom page fault handler was also
> still in place. The test now correclty removes protection from the whole
> area and sets back the original page fault handler.
>
> Test: angle_unittests --gtest_filter="SystemUtils.PageFaultHandler*"
> Bug: angleproject:5857
> Change-Id: Ibb0acfefd9a09c3360c04c812a2a8346b951e1da
> Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/3322992
> Reviewed-by: Jamie Madill <jmadill@chromium.org>
> Commit-Queue: Lubosz Sarnecki <lubosz.sarnecki@collabora.com>

Test: angle_unittests --gtest_filter="SystemUtils.PageFaultHandler*"
Bug: angleproject:5857
Change-Id: Ifaa966a7c569aa9ff0112897a02fa8f873cd52dd
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/3329610
Reviewed-by: Cody Northrop <cnorthrop@google.com>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Lubosz Sarnecki <lubosz.sarnecki@collabora.com>

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  • Git HTTP https://git.kmx.io/kc3-lang/angle.git
    Git SSH git@git.kmx.io:kc3-lang/angle.git
    Public access ? public
    Description

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

    Homepage

    Github
    Users
    		 thodg_m kc3_lang_org thodg_w www_kmx_io thodg thodg_l
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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 complete
    OpenGL ES 3.0 complete complete complete complete in progress
    OpenGL ES 3.1 incomplete complete complete complete
    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
    GGP (Stadia) complete
    Fuchsia complete

    ANGLE v1.0.772 was certified compliant by passing the OpenGL ES 2.0.3 conformance tests in October 2011.

    ANGLE has received the following certifications with the Vulkan backend:

    • OpenGL ES 2.0: ANGLE 2.1.0.d46e2fb1e341 (Nov, 2019)
    • OpenGL ES 3.0: ANGLE 2.1.0.f18ff947360d (Feb, 2020)
    • OpenGL ES 3.1: ANGLE 2.1.0.f5dace0f1e57 (Jul, 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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