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kc3-lang/angle

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  • Author : Nico Weber
    Date : 2018-02-09 10:01:32
    Hash : 41b072b6
    Message : Prepare for -Wimplicit-fallthrough in ANGLE. Disable the warning for flex-generated output, which contains lots of intentional fallthrough. Fixes a bug where GL_SAMPLE_ALPHA_TO_ONE_EXT would fall through to GL_COVERAGE_MODULATION_CHROMIUM and hence behave like that. Fixes a bug in the D3D9 state management where invalidating DIRTY_BIT_POLYGON_OFFSET would also invalidate the stencil bits. One somewhat common incorrect pattern in ANGLE is nested switch statements that look like so: switch (a) { case a1: switch (b) { case b1: ... break; } case a2: ... } The assumption here seems to be that the breakk exits the outer case (here a1), while it in fact only exits the inner switch, so that we fall through to a2. In most places, I fixed this by adding an explicit `break` after the inner switch. This fixes a bug wher GL_PATH_JOIN_STYLE_CHROMIUM would fall through to GL_PATH_MITER_LIMIT_CHROMIUM in validation (but since the join style enum is always > 0, this happened to not have an effect in practice). This also fixes 87 bugs in GetLoadFunctionsMap() where invalid values would previously return an unrelated function map instead of the empty load function map. Bug: chromium:810767 Change-Id: Ib51388c73fbfc229160e2c10f8fb9364cc7c996c Reviewed-on: https://chromium-review.googlesource.com/911529 Commit-Queue: Nico Weber <thakis@chromium.org> Reviewed-by: Geoff Lang <geofflang@chromium.org>

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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.

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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 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.

    Level of OpenGL ES support via backing renderers

    | | 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 |

    Platform support via backing renderers

    | | Direct3D 9 | Direct3D 11 | Desktop GL | GL ES | Vulkan | |------------:|:--------------:|:--------------:|:-------------:|:-----------:|:-----------:| | Windows | complete | complete | complete | complete | in progress | | Linux | | | complete | | planned | | Mac OS X | | | in progress | | | | Chrome OS | | | | complete | planned | | Android | | | | complete | planned |

    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.

    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. For generating a Windows Store version of ANGLE view the Windows Store instructions

    Contributing