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Kevin Lubick 262dfbafb4 [experimental] Add WebGPU demo (built with Bazel) 
This uses the Bazel rule wasm_cc_binary, which is defined
in @emsdk [1]

Note that wasm_cc_binary does not have a linkopts argument
defined, so we instead put any emcc options in the cc_binary
target.

This works around a few bugs in the emsdk Bazel rules:
 - https://github.com/emscripten-core/emsdk/issues/907
 - https://github.com/emscripten-core/emsdk/issues/807

Prior to PS 5, this CL tried a different way to bring in
the toolchain, a more manual way outlined in [2].

A similar approach (modifying the .bazelrc and specifying
the toolchain directly) might be necessary at some point,
but can probably still be done using the @emsdk Bazel rules
and --config=wasm.

To update the version of emscripten used, we just need to
update the parameter in the WORKSPACE call to emsdk_emscripten_deps().

The example/index.html file in this CL does exactly the same
as [3], except the WebGPU calls are made from C++ via WASM.
I made heavy use of these examples [4], [5] while exploring
APIs. What was also useful was looking at the emscripten
source headers [6], [7], [8], [9].

I also learned a lot about WebGPU from [10].

[1] 3891e7b04b/bazel/emscripten_toolchain/wasm_cc_binary.bzl
[2] https://hackernoon.com/c-to-webassembly-using-bazel-and-emscripten-4him3ymc
[3] 206c1f3f7e/demos.skia.org/demos/webgpu/index.html
[4] https://github.com/kainino0x/webgpu-cross-platform-demo
[5] https://github.com/Twinklebear/wgpu-cpp-starter
[6] 5e6c74153b/system/include/emscripten/html5_webgpu.h
[7] 5e6c74153b/system/include/webgpu/webgpu.h
[8] 5e6c74153b/system/include/webgpu/webgpu_cpp.h
[9] 5e6c74153b/src/library_html5_webgpu.js (L24)
[10] https://alain.xyz/blog/raw-webgpu

Change-Id: Iff33b72e7265200b2caacbc03e5fcc06a650b56b
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/457396
Reviewed-by: Leandro Lovisolo <lovisolo@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>
2021-10-12 18:34:55 +00:00
animations first cut at a checkbox 2009-10-21 19:41:10 +00:00
bazel bazel baby steps 2020-09-14 15:18:32 +00:00
bench Make class members that are static constexpr also be inline. 2021-10-11 16:22:59 +00:00
bin [sk] Update asset download references to use SK 2021-09-17 16:55:53 +00:00
build/fuchsia [fuchsia] Fix fidlc command. 2020-06-10 03:29:24 +00:00
build_overrides Add Abseil dependency for Dawn 2021-09-22 22:05:32 +00:00
client_utils/android Make class members that are static constexpr also be inline. 2021-10-11 16:22:59 +00:00
demos.skia.org [demos] Add WebGPU demo using origin trial 2021-10-08 16:35:34 +00:00
dm Fix G3 build 2021-10-11 21:26:37 +00:00
docker [infra] Update cmake docker image to be Debian 10 2021-07-23 11:21:31 +00:00
docs/examples Reland "Add sRGB 8888 colortype" 2021-08-24 12:56:32 +00:00
example Remove SDL from DEPS (and SDL example that used it) 2021-05-27 21:37:57 +00:00
experimental [experimental] Add WebGPU demo (built with Bazel) 2021-10-12 18:34:55 +00:00
fuzz Add support for function prototypes in Pipeline stage. 2021-09-30 20:02:19 +00:00
gm Add test slide that mirrors the Chrome fillrect_gradient test. 2021-10-12 00:43:58 +00:00
gn Support building on clang with -std=c++14 but no C++17 extension warning. 2021-10-12 16:34:30 +00:00
include Revert "add a scaled uint32x4_t divided by uint32_t to SkVx" 2021-10-12 18:14:18 +00:00
infra [graphite] Run the tests on the Graphite bots 2021-10-12 00:24:12 +00:00
modules Support building on clang with -std=c++14 but no C++17 extension warning. 2021-10-12 16:34:30 +00:00
platform_tools [JetSki] bind drawGlyphs to JetSki for Text rendering 2021-09-22 19:38:13 +00:00
resources Fix ES2 conformance test 'in_vs_no_in'. 2021-10-11 22:27:37 +00:00
samplecode Make class members that are static constexpr also be inline. 2021-10-11 16:22:59 +00:00
site Update instructions for running debugger locally 2021-10-11 21:45:31 +00:00
specs [infra] Port serve.py from Python2 to 3 2021-08-31 15:28:19 +00:00
src Support building on clang with -std=c++14 but no C++17 extension warning. 2021-10-12 16:34:30 +00:00
tests Revert "add a scaled uint32x4_t divided by uint32_t to SkVx" 2021-10-12 18:14:18 +00:00
third_party Roll skcms from b5aafce0db45 to 0d5496480324 (1 revision) 2021-10-06 21:51:25 +00:00
tools Support building on clang with -std=c++14 but no C++17 extension warning. 2021-10-12 16:34:30 +00:00
.bazelignore bazel baby steps 2020-09-14 15:18:32 +00:00
.clang-format no more bin packing in .clang-format 2021-03-04 17:22:50 +00:00
.clang-tidy Disable ClangTidy namespace comments for short blocks. 2020-08-24 14:01:22 +00:00
.gitignore add mskps/ to .gitignore 2021-07-06 21:04:55 +00:00
.gn Pre-emptive fix for upcoming ANGLE change. 2021-01-08 17:23:52 +00:00
AUTHORS Add trusted service accounts to AUTHORS file 2021-09-29 20:18:40 +00:00
BUILD.bazel bazel baby steps 2020-09-14 15:18:32 +00:00
BUILD.gn [graphite] Set up unit testing system 2021-10-11 16:18:05 +00:00
codereview.settings Make uploading to Gerrit the default for Skia 2016-11-09 19:07:56 +00:00
CONTRIBUTING Fix references to https://sites.google.com/site/skiadocs/. 2015-02-03 13:12:54 -02:00
CQ_COMMITTERS Moved committer list to chrome-infra-auth and deleted it from the repo 2015-09-02 13:37:54 -07:00
DEPS Roll SwiftShader from eacf0cd26b0a to b0f8eb113c65 (1 revision) 2021-10-12 05:58:29 +00:00
DIR_METADATA Move metadata in OWNERS files to DIR_METADATA files 2021-02-02 23:41:54 +00:00
go.mod [infra] Roll infra to update vpython 2021-09-10 17:41:28 +00:00
go.sum [infra] Roll infra to update vpython 2021-09-10 17:41:28 +00:00
LICENSE LICENSE file: clean up 2019-11-22 21:59:03 +00:00
OWNERS [infra] Add wildcard OWNERS 2021-08-30 19:19:34 +00:00
PRESUBMIT.py Remove AUTHORS check from PRESUBMIT.py 2021-09-30 14:12:18 +00:00
public.bzl Separate SkUnicode bazel source sets 2021-08-09 18:23:15 +00:00
README Fix references to https://sites.google.com/site/skiadocs/. 2015-02-03 13:12:54 -02:00
README.chromium Update README.chromium. 2015-06-11 13:19:24 -07:00
RELEASE_NOTES.txt Add release note for SkRuntimeEffect change in Milestone 96. 2021-10-08 13:55:15 +00:00
whitespace.txt Test SkCQ 2021-07-24 21:07:28 +00:00
WORKSPACE.bazel bazel baby steps 2020-09-14 15:18:32 +00:00

README 

Skia is a complete 2D graphic library for drawing Text, Geometries, and Images.

See full details, and build instructions, at https://skia.org.