Metal validation layer does not allow indexCount or instanceCount to be 0 in
drawIndexedPrimitives and drawPrimitives, otherwise we should draw nothing
with these operations.
BUG=dawn:76
TEST=dawn_end2end_tests
Change-Id: Ic22be73ac992289d4bc8d7b3d4d30d20c4488776
Reviewed-on: https://dawn-review.googlesource.com/c/3900
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Kai Ninomiya <kainino@chromium.org>
This moves ownership of ObjectAllocators and CommandSerializers
from the Device to the Client. There may be also be multiple
Devices, so New() now takes the Device the object belongs to.
Device allocation specializes New() to take the owning Client so
that we can get a pointer to the Client from any Dawn API object.
Bug: dawn:88
Change-Id: Ie4274d46313884c44a857159e95d236dc1141c0c
Reviewed-on: https://dawn-review.googlesource.com/c/4001
Commit-Queue: Austin Eng <enga@chromium.org>
Reviewed-by: Kai Ninomiya <kainino@chromium.org>
This patch copies methods and classes from WireServer.cpp and
distributes them over multiple files. Headers and forward declarations
are added as necessary, but no functional changes are made.
Bug: dawn:88
Change-Id: I471b8c27804916257eff266a51d087ba1ddbfeb6
Reviewed-on: https://dawn-review.googlesource.com/c/4000
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Kai Ninomiya <kainino@chromium.org>
Commit-Queue: Austin Eng <enga@chromium.org>
Manages a single persistently mapped GPU heap which is sub-allocated
inside of ring-buffer for uploads. To handle larger buffers without additional
unused heaps, ring buffers are created on-demand.
BUG=dawn:28
TEST=dawn_unittests
Change-Id: Ifc5a1b06baf8633f1e133245ac1ee76275431cc5
Reviewed-on: https://dawn-review.googlesource.com/c/3160
Commit-Queue: Bryan Bernhart <bryan.bernhart@intel.com>
Reviewed-by: Kai Ninomiya <kainino@chromium.org>
This changes the dawn_static_and_shared_library template to be a
dawn_component template that mimics the behavior of Chromium's
components.
This helps avoid issues where on non-component builds on Windows the CRT
would get linked statically in both the Dawn shared libraries and the
test executables, causing alloc/deallocs across library boundaries to
crash.
BUG=dawn:29
Change-Id: I69287a523cc0bf5f2e921982ea9c26dcfed82f11
Reviewed-on: https://dawn-review.googlesource.com/c/4040
Reviewed-by: Kai Ninomiya <kainino@chromium.org>
Reviewed-by: Austin Eng <enga@chromium.org>
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
This patch copies methods and classes from WireClient.cpp and
distributes them over multiple files. Headers and forward declarations
are added as necessary, but no logical changes are made.
Bug: dawn:88
Change-Id: I9d0fcaeb67e789c3ad0597eaa3839adefc3ac5f9
Reviewed-on: https://dawn-review.googlesource.com/c/3980
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Austin Eng <enga@chromium.org>
Unify code generation for Client->Server and Server->Client commands.
Methods in dawn.json are converted into command records and additional
commands are specified in dawn_wire.json. This can then be used to
completely generate the command handlers and command struct definitions.
Bug: dawn:88
Change-Id: Ic796796ede0aafe02e14f1f96790324dad92f4c0
Reviewed-on: https://dawn-review.googlesource.com/c/3800
Commit-Queue: Austin Eng <enga@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
This is useful for people using Dawn's standalone build to compile
static libraries to use in other projects. Without this static libraries
will act as source sets as is GN's default.
BUG=dawn:85
Change-Id: I4d99cbbbe67c73f226717651cb12ed0a172409b2
Reviewed-on: https://dawn-review.googlesource.com/c/3840
Reviewed-by: Stephen White <senorblanco@chromium.org>
Reviewed-by: Kai Ninomiya <kainino@chromium.org>
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
Chromium will want to have both static and shared library versions of
Dawn to use in non-component and component builds respectively.
The *_export.h files are modified to noop when *_SHARED_LIBRARY is not
defined so that the static library doesn't export symbols that aren't
imported in dependents (this would break compilation on Windows).
A dawn_library_combo is introduced in BUILD.gn that factors out all the
logic needed to produce shared libraries and handle the _EXPORT macros.
Also contains a fix to dawncpp to export only the methods that aren't
defined in the header (otherwise they get defined multiple times)
BUG=dawn:85
Change-Id: Ib747deb9308e1165dd66002487147ba279d3eac0
Reviewed-on: https://dawn-review.googlesource.com/c/3761
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
This adds a new FooBackend.cpp file for each backend that defines
exactly the symbols that are exported by libdawn_native's headers. THis
will allow factoring most of the compilation of dawn_native between the
shared and static library variants.
BUG=dawn:85
Change-Id: I69c808dac2fe5e8bb08356117e3997677787b08a
Reviewed-on: https://dawn-review.googlesource.com/c/3760
Reviewed-by: Stephen White <senorblanco@chromium.org>
Reviewed-by: Kai Ninomiya <kainino@chromium.org>
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
This removes unnecessary builder and buffer info from server objects that
do not need them.
Bug: dawn:86
Change-Id: I97b11615da763725281495f05c70a4ee7a9c9e5a
Reviewed-on: https://dawn-review.googlesource.com/c/3780
Commit-Queue: Austin Eng <enga@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
The OpenGL backend can't gather discover default adapters because it
needs getProc to do anything so we add DiscoverAdapters method to
Instance that takes backend-specific options.
dawn_native::opengl::CreateDevice is removed in favor of the adapter
path so OpenGLBinding is modified to create an instance locally. This is
only temporary until all backends support adapters, at which point a lot
of *Binding code will be factored.
Also contains a small fix for Result<T, E> with movable types.
BUG=dawn:29
Change-Id: I4eb3d4a14a871af73e1872132aff72b45e5fe566
Reviewed-on: https://dawn-review.googlesource.com/c/3663
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Kai Ninomiya <kainino@chromium.org>
New objects are introduced to control what happens before device
creation in dawn_native:
- Instance: a connection from the application to dawn_native that is
used for dependency injection and to discover adapters.
- Adapters: represents the possibility of device creation for a specific
(GPU, backend) pair.
- BackendConnection: an internal object that standardizes the interface
between the frontend and backends.
The BackendConnection interface is implemented for the Null backend and
stubbed out in other backends. This allows this change to port the
ValidationTests to use the new Instance and Adapters concept and deal
with other backends later.
BUG=dawn:29
Change-Id: I19719a9342b4af091accc0c02fb6b9697eadde7b
Reviewed-on: https://dawn-review.googlesource.com/c/3500
Reviewed-by: Stephen White <senorblanco@chromium.org>
Reviewed-by: Kai Ninomiya <kainino@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
This adds a CheckVkSuccess utility function that adds the VkResult value
to the context lost error message.
Also adds a small fix to dawn_native/Error.h interoperability between
MaybeError and ResultOrError<NonPointer> with tests.
BUG=chromium:917555
BUG=dawn:79
Change-Id: Icc01122d62d83693fc0ea3f26b272f2372fd3087
Reviewed-on: https://dawn-review.googlesource.com/c/3623
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Kai Ninomiya <kainino@chromium.org>
WebGPUSampler is much more complete than Dawn's Sampler.
This patch implement the missing part.
BUG=dawn:47
Change-Id: Ief45cb9710493e9d79ddab60fe3be5a123b76ebd
Reviewed-on: https://dawn-review.googlesource.com/c/3540
Commit-Queue: Shaobo Yan <shaobo.yan@intel.com>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
This change also removes DepthStencilState object.
Bug=dawn:31
Change-Id: I7bb54ef4da527184bb2726c77d93d411d44c3956
Reviewed-on: https://dawn-review.googlesource.com/c/3541
Reviewed-by: Kai Ninomiya <kainino@chromium.org>
Commit-Queue: Yunchao He <yunchao.he@intel.com>
This change also removes BlendState object.
Bug=dawn:32
Change-Id: I8bf4ff7531e7504efb17b6bae3ca01f1f2b4131e
Reviewed-on: https://dawn-review.googlesource.com/c/3042
Reviewed-by: Kai Ninomiya <kainino@chromium.org>
Commit-Queue: Yunchao He <yunchao.he@intel.com>
This patch adds the support of the parameter 'baseVertex' of drawIndexed
on D3D12, Metal and Vulkan back-ends.
BUG=dawn:51
TEST=dawn_end2end_tests
Change-Id: Ibd25884ad2abceaaed744d74c4ee6b0ae6b3fa1b
Reviewed-on: https://dawn-review.googlesource.com/c/3221
Commit-Queue: Jiawei Shao <jiawei.shao@intel.com>
Reviewed-by: Kai Ninomiya <kainino@chromium.org>
This patch updates the definition of TextureDescriptor to make it match
WebGPU IDL:
1. Rename 'arrayLayer' to 'arraySize'
2. Add the missing member "sampleCount" and check that currently
sampleCount can only be 1.
BUG=dawn:56
TEST=dawn_unittests
Change-Id: I642186529f045865ae344cb5545ac80e14445c59
Reviewed-on: https://dawn-review.googlesource.com/c/3180
Reviewed-by: Kai Ninomiya <kainino@chromium.org>
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
This patch remove render pipeline builder and use descriptor to create render pipeline.
Sub-objects in descriptor will be removed in future.
Bug: dawn:4
Change-Id: I58dd569c7be42c2648311847b939c681189c2854
Reviewed-on: https://dawn-review.googlesource.com/c/2180
Reviewed-by: Kai Ninomiya <kainino@chromium.org>
Commit-Queue: Kai Ninomiya <kainino@chromium.org>
This will allow use to update gn_isolate_map_pyl to point to the groups
instead of the targets, while we move the actual targets in a different
file.
BUG=chromium:913171
Change-Id: Ic681fb12d9cbc99557b742784f5b1bf779b76ed1
Reviewed-on: https://dawn-review.googlesource.com/c/3100
Reviewed-by: Stephen White <senorblanco@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
This reverts commit 672d29d14c.
Reason for revert: https://bugs.chromium.org/p/chromium/issues/detail?id=913171
Original change's description:
> Create new src/tests BUILD.gn file.
>
> Move all test-related build stuff into its own BUILD.gn file. This
> required moving the dawn_generator template into a common file, so it
> can be called by both BUILD.gn and src/tests/BUILD.gn.
>
> [This is a reland of https://dawn-review.googlesource.com/c/dawn/+/2940
> with a fix for mock_dawn.]
>
> Bug: dawn:61
> Change-Id: Id1e6d0c2b07caa2610cebe206511e972ac18fe8d
> Reviewed-on: https://dawn-review.googlesource.com/c/3020
> Reviewed-by: Kai Ninomiya <kainino@chromium.org>
> Reviewed-by: Corentin Wallez <cwallez@chromium.org>
> Commit-Queue: Stephen White <senorblanco@chromium.org>
TBR=cwallez@chromium.org,kainino@chromium.org,senorblanco@chromium.org
Change-Id: I54cdc558b128935dc8a8d22ec2b5e879271c35ae
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: dawn:61
Reviewed-on: https://dawn-review.googlesource.com/c/3080
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
Move all test-related build stuff into its own BUILD.gn file. This
required moving the dawn_generator template into a common file, so it
can be called by both BUILD.gn and src/tests/BUILD.gn.
[This is a reland of https://dawn-review.googlesource.com/c/dawn/+/2940
with a fix for mock_dawn.]
Bug: dawn:61
Change-Id: Id1e6d0c2b07caa2610cebe206511e972ac18fe8d
Reviewed-on: https://dawn-review.googlesource.com/c/3020
Reviewed-by: Kai Ninomiya <kainino@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Stephen White <senorblanco@chromium.org>
This reverts commit 0a7ddd43d7.
Reason for revert: Broke compile in https://ci.chromium.org/p/chromium/builders/luci.chromium.ci/linux-rel/12314
See also: https://chromium-review.googlesource.com/c/chromium/src/+/1364694
Original change's description:
> Create new src/tests BUILD.gn file.
>
> Move all test-related build stuff into its own BUILD.gn file. This
> required moving the dawn_generator template into a common file, so it
> can be called by both BUILD.gn and src/tests/BUILD.gn.
>
> Bug: dawn:61
>
> Change-Id: Icaa459270bdaa60306e053b93835812e70dba6f5
> Reviewed-on: https://dawn-review.googlesource.com/c/2940
> Reviewed-by: Kai Ninomiya <kainino@chromium.org>
> Reviewed-by: Stephen White <senorblanco@chromium.org>
TBR=cwallez@chromium.org,kainino@chromium.org,senorblanco@chromium.org
Change-Id: If6d8c759f63c12b244471016f10e92c07299303f
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: dawn:61
Reviewed-on: https://dawn-review.googlesource.com/c/3000
Reviewed-by: Kai Ninomiya <kainino@chromium.org>
Commit-Queue: Kai Ninomiya <kainino@chromium.org>
Move all test-related build stuff into its own BUILD.gn file. This
required moving the dawn_generator template into a common file, so it
can be called by both BUILD.gn and src/tests/BUILD.gn.
Bug: dawn:61
Change-Id: Icaa459270bdaa60306e053b93835812e70dba6f5
Reviewed-on: https://dawn-review.googlesource.com/c/2940
Reviewed-by: Kai Ninomiya <kainino@chromium.org>
Reviewed-by: Stephen White <senorblanco@chromium.org>
This change implements timeline fences in Dawn.
It includes methods and descriptor members to eventually
support multi-queue, but does not implement them.
Bug: dawn:26
Change-Id: I81d5fee6acef402fe099227a034d9669a89ab6c3
Reviewed-on: https://dawn-review.googlesource.com/c/2460
Commit-Queue: Austin Eng <enga@chromium.org>
Reviewed-by: Kai Ninomiya <kainino@chromium.org>
This will make GPU tests running on Chromium-based builders respect this
configuration, which is important to have the same code run in Release
and Debug builds on the GPU FYI waterfall.
BUG=chromium:901830
Change-Id: Ia2f6f3585c4b6213fe7f55203c69d0ef4a620a67
Reviewed-on: https://dawn-review.googlesource.com/c/2708
Reviewed-by: Stephen White <senorblanco@chromium.org>
Reviewed-by: Kenneth Russell <kbr@google.com>
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
Becuase CGDisplayIOServicePort is deprecated in OSX >= 10.9, we create
an alternative function which manually finding a service port with
matching vendor and product IDs.
BUG=dawn:10
TEST=dawn_end2end_tests
Change-Id: I94ff65911e159c2b7075209d8902c1551560ed47
Reviewed-on: https://dawn-review.googlesource.com/c/2541
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Kai Ninomiya <kainino@chromium.org>
This change moves most of SerialQueue into SerialStorage
and factors it to make SerialMap and SerialQueue. SerialMap
does not enforce that items are Enqueue'd in monotonically
increasing order. This is useful for implement timeline fences
because OnCompletion callbacks may be added in an arbitrary order.
Bug: dawn:26
Change-Id: I03376117311112b0b94ed887a31974f36c4a5464
Reviewed-on: https://dawn-review.googlesource.com/c/2720
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
Otherwise UBSan complains that C++ types are different between the
shared libraries because libc++ is linked statically.
BUG=chromium:904736
Change-Id: I51ef40d1f7910fd693a4585c74ff404812472d2e
Reviewed-on: https://dawn-review.googlesource.com/c/2380
Reviewed-by: Dan Sinclair <dsinclair@google.com>
Reviewed-by: Kai Ninomiya <kainino@chromium.org>
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
This will avoid compilation to break, and adds standalone reproducers
for the fuzzer_tests.
BUG=chromium:903380
BUG=dawn:34
Change-Id: I9995a852076d9f6d1ebdee5b999989c2d74d4709
Reviewed-on: https://dawn-review.googlesource.com/c/2321
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Ryan Harrison <rharrison@chromium.org>
Reviewed-by: Dan Sinclair <dsinclair@google.com>
This CL adds in fuzzers for SPIRV-Cross for HLSL, GLSL, and MSL
outputs. These fuzzers live in Dawn because there is not appropriate
location in the Chromium source repo for them and it is unlikely they
would be land-able in the SPIRV-Cross repo, because it is not coupled
with Chromium's build system and thus Clusterfuzz so would be
effectively dead code. Dawn depends on this code, but it is also
integrated into the Chromium build system, so this was the best place
I could find for them
The code under fuzz unfortunately uses exceptions/aborting as its
error reporting mechanism. This is an acknowledge short coming and
there are efforts to remove this behaviour. To work around this and
reduce the number of false positives found by the fuzzers, a signal
trap has been implemented which will be removed once the code under
fuzz has been updated.
The trap replaces the existing signal handler and silencing signals
while running the code under test. This allows the code under test to
call abort() and not crash the fuzzing process. Theoretically, only
SIGABRT should need to be trapped, but something is causing the signal
from abort() to be converted to SIGSEGV when running under ASAN.
This signal trap has been tested with the fuzzing/sanitizers by
intentionally inserting bad calls that will occur after a few thousand
test cases. It was confirmed that the fuzzer detected the issue and
stops fuzzing.
The alternate to implementing this signal trap would be to turn on
exceptions for the fuzzer. This was attempted, but proved to be
fruitless due to what was reported as an ODR issue, but couldn't
couldn't be silenced. The likely underlying issue was a pre-built
library or other object being built without exceptions was causing
different versions of symbols or the exception version of the standard
library not being instrumented by ASAN. Given the majority of Chromium
eco-system turns off exceptions, fixing this issue would not be
helpful to the larger community and was looking like it would require
significant effort.
BUG=chromium:903380
Change-Id: I63a5595383f99b7a0e150d72bb04c89b8d722631
Reviewed-on: https://dawn-review.googlesource.com/c/2260
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Max Moroz <mmoroz@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Likewise "presented" textures won't be available for use in submits so
this sets up state-tracking and validation for textures too.
Command buffer resource usage is now stored in the frontend instead of
done per-backend because it is used to validate resources are allowed in
the submits.
Also adds a test.
BUG=dawn:9
Change-Id: I0537c5113bb33a089509b4f2af4ddf4eff8051ea
Reviewed-on: https://dawn-review.googlesource.com/c/2142
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
Running test in a Chromium build requires using their gtest and gmock
targets as well as a harness that is in //base. Since we want to run
Dawn tests on the Chromium GPU bots, we need to support two
configurations both building tests standalone and in Chromium.
BUG=chromium:870747
Change-Id: I862e62a607e193a27562ece0f1f6d46d8728e446
Reviewed-on: https://dawn-review.googlesource.com/c/2080
Reviewed-by: Kai Ninomiya <kainino@chromium.org>
Reviewed-by: Stephen White <senorblanco@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
ObjectBase will contain data that all WebGPU objects have such as a
pointer back to the device, a refcount (via inheriting from RefCounted),
a name, an error status etc.
BUG=dawn:24
Change-Id: I919e1a6d4a68811ceb6e503b2a793815c92f2528
Reviewed-on: https://dawn-review.googlesource.com/c/1620
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Kai Ninomiya <kainino@chromium.org>
This patch adds the entry point creating texture view with a
TextureViewDescriptor and all the validations on the parameters
according to https://github.com/gpuweb/gpuweb/issues/79.
BUG=dawn:16
TEST=dawn_unittests
Change-Id: Ibc04a0f7b9f334c57da191606313ab156e18af1f
Reviewed-on: https://dawn-review.googlesource.com/c/1800
Commit-Queue: Jiawei Shao <jiawei.shao@intel.com>
Reviewed-by: Kai Ninomiya <kainino@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
This rolls glslang and shaderc to be able to use their BUILD.gn files,
and also rolls SPIRV-Tools and spirv-headers to have compatible
versions.
BUG=chromium:870747
Change-Id: I13c615f6f3d148c9b69f06547992bf5910e04e62
Reviewed-on: https://dawn-review.googlesource.com/c/1680
Reviewed-by: Kai Ninomiya <kainino@chromium.org>
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
If a bindgroup was re-used in multiple command buffers in a single call
to queue.Submit(), it was skipping the creation of the corresponding
descriptor heap for that bind group in the second command buffer.
The fix is to use the command buffer's index into the submit command as
part of the key for the bind group's descriptor heap.
Change-Id: Ie66a0e772b10cc72bf040f090dac4c4a10f24266
Reviewed-on: https://dawn-review.googlesource.com/c/1740
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Stephen White <senorblanco@chromium.org>
This splits off part of CommandBufferBuilder in separate
RenderPassEncoder and ComputePassEncoder objects. To match the WebGPU
IDL and factor some code, both these encoders inherit from
ProgrammablePassEncoder.
These encoders are pure frontend objects and record into the
CommandBufferBuilder command allocator objects, so no changes to the
backends were needed.
Error handling is still ew, because the "builder" mechanism we had
doesn't allow for "split builders". Nicer error handling will have to
wait on Dawn matching WebGPU.
All the tests and samples were updated to the new structure.
BUG=dawn:5
Change-Id: I5f5d4ad866e2c07fedd1ba7a122258c6610941f1
Reviewed-on: https://dawn-review.googlesource.com/1543
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
This integrates spirv-val in dawn_native so that regular and
WebGPU-specific validation of shaders is done.
Also adds tests to check OpUndef is correctly rejected so we know
WebGPU-specific validation is working.
Change-Id: If49d276c98bca8cd3c6c1a420903fe34923a2942
Linking against their .lib makes loading Dawn fail on systems that don't
have the DLLs. This happens for example on Windows7 that doesn't have
d3d12.dll. Instead we dynamically load functions pointers from these
DLLs at d3d12::Device startup.
Change-Id: I4d01a12d0f91bec45bf125450d2c08aaa9ff9fac
Chromium's BUILD files try to avoid uses of exec_script when possible
because they slow down every GN invocation. In preparation for building
Dawn inside Chromium, the calls to exec_script for the code generator
are removed.
In GN, the generator now outputs a "JSON tarball", a dictionnary mapping
filenames to content. This allows us to use the "depfile" feature of GN
to avoid the exec_script call to gather the script's inputs.
Outputs of the generator are now listed in the BUILD.gn files. To keep
it in sync with the generator, GN outputs a file containing "expected
outputs" that is checked by the code generator.
Finally the dawn_generator GN template doesn't create a target anymore,
but users are expected to gather outputs using get_target_outputs.
Corentin Wallez
Li Hao
Austin Eng
Bryan Bernhart
Yan, Shaobo
Yunchao He
Jiawei Shao
Stephen White
Kai Ninomiya
Ryan Harrison