kc3-lang/angle

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    Commit

  • Hash : 684ff60b
    Author : Amirali Abdolrashidi
    Date : 2022-06-21T10:52:31 

    Vulkan: Add shared ring buffer cmd alloc feature

* Added RingBufferAllocator.cpp with implementation.
  * Main classes:
    * RingBufferAllocator (fast allocation with bulk deallocation)
    * SharedRingBufferAllocator (wrapper to help with shared use and
    multiple threads)

* Implemented "angle_enable_vulkan_shared_ring_buffer_cmd_alloc"
feature. (Disabled by default)
  * Details (from the original CL)
    * The angle::PoolAllocator replaced with
    angle::RingBufferAllocator.

    * Before, there was separate angle::PoolAllocator per each
    CommandBufferHelper. Now, a single angle::RingBufferAllocator
    is shared between multiple CommandBufferHelper objects.

    * Commands data from multiple CommandBufferHelpers is
    tightly packed without fragmentation.

  * Significantly less memory overhead, observed with enabled
    async queue.

* Moved the parts of the code related to the allocators into the
  classes in the new AllocatorHelperPool and AllocatorHelperRing files
  for better management. The allocator can be switched by changing the
  following BUILD flag:
  `angle_enable_vulkan_shared_ring_buffer_cmd_alloc`

    * It is connected to the following macro:
      ANGLE_ENABLE_VULKAN_SHARED_RING_BUFFER_CMD_ALLOC

  * The two main allocator classes in each file are aliased as:
    * SecondaryCommandBlockAllocator (in CommandBufferHelper objects)
    * SecondaryCommandBlockPool (in SecondaryCommandBuffer)

  * Also added placeholder functions for VulkanSecondaryCommandBuffer.

* Added descriptions regarding the two allocators.
  * renderer/vulkan/doc/Allocators.md

Credit: Original CL authored by Igor Nazarov <i.nazarov@samsung.com>

Bug: angleproject:6401
Bug: b/256666069
Change-Id: I0f24793eef6334bf4ff8e327b9665338807dad37
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/3715968
Reviewed-by: Charlie Lao <cclao@google.com>
Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
Commit-Queue: Amirali Abdolrashidi <abdolrashidi@google.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
    		 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 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 in progress
    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 1.5 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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