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kc3-lang/angle/src/libANGLE/renderer/vulkan/shaders

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  • Author : Shahbaz Youssefi
    Date : 2021-03-05 04:07:21
    Hash : e354ff1a
    Message : Vulkan: Allow DynamicBuffer suballocation in BufferVk When allocations are made from DynamicBuffer, they suballocate from a possibly larger BufferHelper. In BufferVk, the offset of the suballocation was discarded, which limited the use of DynamicBuffer to a pool of small buffers. This change applies any such offset that may arise from suballocations everywhere, and makes BufferVk use a larger buffer size when the GL_DYNAMIC_* buffer usage hints are provided. Bug: angleproject:5719 Change-Id: I3df3317f7acff1b1b06a5e3e2bb707616a7d0512 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2738650 Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org> Reviewed-by: Tim Van Patten <timvp@google.com> Reviewed-by: Jamie Madill <jmadill@chromium.org>

  • README.md

  • Shader Variations

    To build multiple variations of a shader, add a file named X.json corresponding to shader file X. A variation is generated by building the shader with different definitions (a la glslang_validator's -DName=1). These definitions come from flags and enumerations defined in the json file. Without a .json file, the shader is generated as is (1 variation).

    There are multiple possible fields in the json file:

    • "Description": This contains the license and other comments, which will be ignored.
    • "Flags": this is a list of flags. Each flag FLAG defines a shader variation with or without the define FLAG=1.
    • other: any other field is a similar list to flags, except that each entry in this enumeration is a variation. Similar to "flags", every entry ENTRY results in an ENTRY=1 define.

    Flags are shorthand for 2-entry enumerations. Given n flags, there are 2^n variations where every flag is either present or not. For enumerations, only one entry is active in any variation. Thus, an enumeration with n entries generates n variations.

    Example

    Here is an example json file:

    { "Description": [ "Copyright 2018 The ANGLE Project Authors. All rights reserved.", "Use of this source code is governed by a BSD-style license that can be", "found in the LICENSE file.", "", "RayTrace.comp.json: Build parameters for RayTrace.comp." ], "Flags": [ "NanFilter", "WorkaroundIntelBug" ], "RayTraceQuality": [ "IsRTLowRes", "IsRTHighRes", "IsRTAwesome" ], "ImageType": [ "IsR", "IsRG", "IsRGB", "IsRGBA" ] }

    This will generate 2^2 * 3 * 4 shaders.