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kc3-lang/angle

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  • Author : Shahbaz Youssefi
    Date : 2021-07-29 11:19:33
    Hash : ebe943e2
    Message : Vulkan: SPIR-V Gen: Fix gl_Clip/CullDistance These built-ins can be redeclared in the shader. The translator took these redeclarations (and gl_LastFragData) as UserDefined symbols. There were a number of hacks such as in name generation and CollectVariables, to special-case these redeclarations. This change instead makes sure that these variables continue to be considered built-ins with the appropriate qualifiers. A number of fixes are made accordingly: - Hacks are removed. - In fragment shaders, ANGLEClipDistance was initialized with gl_ClipDistance for further use by the shader. The code generation however mistakenly produced `gl_ClipDistance[0] = ANGLEClipDistance[0];`, which caused compilation failures by glslang, but passed the tests accidentally because they expected link failures (see next item). - CollectVariables is fixed to correctly collect gl_Clip/CullDistance in fragment shaders; previously they were collected as output varyings, and therefore the aforementioned link error was not produced in the tests after the compilation error was fixed. Additional fixes: - The transformation of gl_Clip/CullDistance was always ever done on one of them due to misplaced breaks in the loop that detected their presence. - The transformation of gl_CullDistance was skipped when it was not redeclared. Validation is added to make sure these built-ins always have the correct qualifier even when redeclared. SPIR-V gen support for these variables have been fixed as well. Bug: angleproject:4889 Change-Id: Ic8bf2c508357035cb937ef41a28ae22ffc533ebe Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/3059921 Reviewed-by: Tim Van Patten <timvp@google.com> Reviewed-by: Jamie Madill <jmadill@chromium.org> Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>

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  • Git HTTP https://git.kmx.io/kc3-lang/angle.git
    Git SSH git@git.kmx.io:kc3-lang/angle.git
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    A conformant OpenGL ES implementation for Windows, Mac, Linux, iOS and Android.

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    Github
    Users thodg git_deploy kc3_lang_org thodg_l thodg_m thodg_w www_kmx_io
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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