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CMake-only fork of https://dawn.googlesource.com/dawn with cleaned, vendored dependencies
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David Neto a568701d61 spirv-reader: support sample_id builtin variable 
TODO: support sample_id declared with signed integer store
type, and then having the pointer passed to a helper function.

Bug: tint:471
Change-Id: Iac303ff6118b2d2d518e5070a8d589dcd3616f39
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/40020
Commit-Queue: Ben Clayton <bclayton@google.com>
Reviewed-by: Ben Clayton <bclayton@google.com>
Auto-Submit: David Neto <dneto@google.com>
 		2021-02-03 22:01:46 +00:00
build_overrides Remove obsolete GN config 2021-01-18 15:25:23 +00:00
docs Update builtin idx names. 2021-01-18 15:51:13 +00:00
fuzzers Add semantic::Node 2021-01-29 15:17:30 +00:00
include/tint Move tint::ast::type to tint::type 2021-01-21 15:42:10 +00:00
infra/config Restrict Windows to Win10 bots 2021-01-27 19:24:25 +00:00
samples Simplify calls to ast::Node::[to_]str() 2021-01-29 11:22:40 +00:00
src spirv-reader: support sample_id builtin variable 2021-02-03 22:01:46 +00:00
test Update storage_buffer storage class. 2021-01-18 21:06:34 +00:00
third_party CMake: Add a flag to control whether to built tint_unittests 2020-12-09 14:47:30 +00:00
tools Add tool to check the WGSL spec examples compile 2021-01-07 01:44:11 +00:00
.clang-format Initial commit 2020-03-02 15:47:43 -05:00
.gitignore Fix typos in CMakeLists 2021-01-18 21:39:14 +00:00
.gn Fixup gn check. 2020-12-02 16:11:59 +00:00
BUILD.gn Add semantic::Call, IntrinsicCall, TextureIntrinsicCall, use them. 2021-02-03 21:02:25 +00:00
CMakeLists.txt CMake: Add a flag to control whether to built tint_unittests 2020-12-09 14:47:30 +00:00
CODE_OF_CONDUCT.md Initial commit 2020-03-02 15:47:43 -05:00
CONTRIBUTING.md Fixup the contributing file. 2020-04-06 18:43:20 +00:00
CPPLINT.cfg Adding PRESUBMIT.py with a bunch of checks turned on 2020-06-03 13:41:41 +00:00
DEPS Roll gpuweb-cts, spirv-headers, spirv-tools 2021-01-29 22:29:21 +00:00
Doxyfile [wgsl-reader][wgsl-writer] Support new sampled texture syntax. 2020-11-04 19:03:21 +00:00
LICENSE Initial commit 2020-03-02 15:47:43 -05:00
PRESUBMIT.py Add language check 2020-11-16 15:01:27 +00:00
README.md One command per line 2020-10-30 15:03:21 +00:00
standalone.gclient Convert dependency management to using gclient 2020-03-05 15:58:27 +00:00
tint_overrides_with_defaults.gni Change the default for BUILD.gn to build all the modules 2020-07-30 18:44:04 +00:00

README.md

Tint

Tint is a compiler for the WebGPU Shader Language (WGSL).

This is not an officially supported Google product.

Requirements

  • Git
  • CMake (3.10.2 or later)
  • Ninja (or other build tool)
  • Python, for fetching dependencies
  • depot_tools in your path

Build options

  • TINT_BUILD_SPV_READER : enable the SPIR-V input reader (off by default)
  • TINT_BUILD_WGSL_READER : enable the WGSL input reader (on by default)
  • TINT_BUILD_SPV_WRITER : enable the SPIR-V output writer (on by default)
  • TINT_BUILD_WGSL_WRITER : enable the WGSL output writer (on by default)
  • TINT_BUILD_FUZZERS : enable building fuzzzers (off by default)

Building

Tint uses Chromium dependency management so you need to install depot_tools and add it to your PATH.

Getting source & dependencies

# Clone the repo as "tint"
git clone https://dawn.googlesource.com/tint tint
cd tint

# Bootstrap the gclient configuration
cp standalone.gclient .gclient

# Fetch external dependencies and toolchains with gclient
gclient sync

Compiling using CMake + Ninja

mkdir -p out/Debug
cd out/Debug
cmake -GNinja ../..
ninja # or autoninja

Compiling using CMake + make

mkdir -p out/Debug
cd out/Debug
cmake ../..
make # -j N for N-way parallel build

Compiling using gn + ninja

mkdir -p out/Debug
gn gen out/Debug
autoninja -C out/Debug

Fuzzers on MacOS

If you are attempting fuzz, using TINT_BUILD_FUZZERS=ON, the version of llvm in the XCode SDK does not have the needed libfuzzer functionality included.

The build error that you will see from using the XCode SDK will look something like this:

ld: file not found:/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/clang/11.0.0/lib/darwin/libclang_rt.fuzzer_osx.a

The solution to this problem is to use a full version llvm, like what you would get via homebrew, brew install llvm, and use something like CC=<path to full clang> cmake .. to setup a build using that toolchain.

Checking [chromium-style] issues in CMake builds

The gn based work flow uses the Chromium toolchain for building in anticipation of integration of Tint into Chromium based projects. This toolchain has additional plugins for checking for style issues, which are marked with [chromium-style] in log messages. This means that this toolchain is more strict then the default clang toolchain.

In the future we will have a CQ that will build this work flow and flag issues automatically. Until that is in place, to avoid causing breakages you can run the [chromium-style] checks using the CMake based work flows. This requires setting CC to the version of clang checked out by gclient sync and setting the TINT_CHECK_CHROMIUM_STYLE to ON.

mkdir -p out/style
cd out/style
cmake ../..
CC=../../third_party/llvm-build/Release+Asserts/bin/clang cmake -DTINT_CHECK_CHROMIUM_STYLE=ON ../../ # add -GNinja for ninja builds

Issues

Please file any issues or feature requests at https://bugs.chromium.org/p/tint/issues/entry

Contributing

Please see the CONTRIBUTING and CODE_OF_CONDUCT files on how to contribute to Tint.