kc3-lang/angle

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  • Hash : d0b270e6
    Author : Jamie Madill
    Date : 2020-08-14T21:55:17 

    Feedback Loop Redesign 1/3: Framebuffer Serials.

Currently we track feedback loops by counting the times a Texture is
bound as a sampler or image in a particular context. This is a bit
tricky because Texture bindings change frequently. Relative to the
number of times we need to check for a feedback loop this causes excess
overhead.

Usually Framebuffers have a low number of Textures bound (in many cases
just 1). And Textures aren't usually bound to many different FBOs. So
instead of counting the number of times a Texture is bound as a sampler
or image we will track the Framebuffers that the Texture is bound to.

Because FBOs are unique to a Context, a Texture could be bound to two
different FBOs with the same ID. In this CL we introduce a new Serial
for the FBO which is unique to an EGL Share Group. This way we can
ensure we don't make the wrong call when a Texture is referenced by a
Framebuffer. It also replaces the old FB serial which was again only
unique to a particular Context.

Bug: angleproject:4500
Bug: angleproject:4959
Change-Id: I0a9989d861a4132bd3b7ed85f699a4448ff37a4e
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2358849
Reviewed-by: Jonah Ryan-Davis <jonahr@google.com>
Reviewed-by: Tobin Ehlis <tobine@google.com>
Reviewed-by: Courtney Goeltzenleuchter <courtneygo@google.com>
Commit-Queue: Jamie Madill <jmadill@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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    Description

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

    Homepage

    Github
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    		 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 in progress
    OpenGL ES 3.0 complete complete complete complete
    OpenGL ES 3.1 in progress 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 in progress

    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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