This reverts commit 4e17d5c2483b63d4863162d692a1a961d1dcb958.
Reason for revert: broken on chromeos
Original change's description:
> Remove VK_DEFINE_NON_DISPATCHABLE_HANDLE magic, use explicit VkHandle wrapper
>
> Overriding VK_DEFINE_NON_DISPATCHABLE_HANDLE changes the function
> signatures of Vulkan functions, changing their ABI and making us
> incompatible with real drivers. This removes that magic, and replaces it
> with an explicit wrapper, VkHandle, which has much of the same
> functionality as the original VkNonDispatchableHandle.
>
> It adds definitions for dawn_native::vulkan::VkBuffer et al, which
> shadow the native ::VkBuffer et al. This retains type safety throughout
> the Vulkan backend without changing every single usage.
>
> Notably, the following things had to change:
> - An explicit conversion from VkBuffer* to ::VkBuffer* is needed for
> arrays. This is implemented as a reinterpret_cast, which is still
> safe as the new VkHandle still has the same memory layout properties
> as VkNonDispatchableHandle did.
> - When pointing to a VkHandle as an output pointer, it's now necessary
> to explicitly get the native ::VkBuffer (via operator*) and point to it.
>
> Bug: chromium:1046362
> Change-Id: I9c5691b6e295aca1b46d4e3d0203956e4d570285
> Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/15580
> Reviewed-by: Austin Eng <enga@chromium.org>
> Reviewed-by: Kai Ninomiya <kainino@chromium.org>
> Commit-Queue: Kai Ninomiya <kainino@chromium.org>
TBR=cwallez@chromium.org,kainino@chromium.org,enga@chromium.org
Change-Id: I500df2e34fd0f245ad04c517ff028ddd7bb5a2bf
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: chromium:1046362
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/15620
Reviewed-by: Kai Ninomiya <kainino@chromium.org>
Commit-Queue: Kai Ninomiya <kainino@chromium.org>
Overriding VK_DEFINE_NON_DISPATCHABLE_HANDLE changes the function
signatures of Vulkan functions, changing their ABI and making us
incompatible with real drivers. This removes that magic, and replaces it
with an explicit wrapper, VkHandle, which has much of the same
functionality as the original VkNonDispatchableHandle.
It adds definitions for dawn_native::vulkan::VkBuffer et al, which
shadow the native ::VkBuffer et al. This retains type safety throughout
the Vulkan backend without changing every single usage.
Notably, the following things had to change:
- An explicit conversion from VkBuffer* to ::VkBuffer* is needed for
arrays. This is implemented as a reinterpret_cast, which is still
safe as the new VkHandle still has the same memory layout properties
as VkNonDispatchableHandle did.
- When pointing to a VkHandle as an output pointer, it's now necessary
to explicitly get the native ::VkBuffer (via operator*) and point to it.
Bug: chromium:1046362
Change-Id: I9c5691b6e295aca1b46d4e3d0203956e4d570285
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/15580
Reviewed-by: Austin Eng <enga@chromium.org>
Reviewed-by: Kai Ninomiya <kainino@chromium.org>
Commit-Queue: Kai Ninomiya <kainino@chromium.org>
The state-tracking of the webgpu.h swapchain is a bit complicated
because contrary to implementation-based swapchains, they have more
guarantees and a "replacing mechanism". For example instead of hoping
the implementation-based swapchain resize automatically, the
surface-based swapchain needs to be replaced by a new swapchain and
invalidated.
This mechanism of invalidation also needs to be triggered when the last
reference to the surface is lost because we don't want to risk the
application destroying the window from under us.
Adds tests for all the cases of invalidation I could think of apart from
device loss.
Bug: dawn:269
Change-Id: Id515dbb640e13c6e30bb1f1e93b8e54f1e2bba4b
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/15400
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Kai Ninomiya <kainino@chromium.org>
This commit changes wgpu::Device::CreateSwapChain to take an additional
wgpu::Surface argument. Passing nullptr is enough to stay on the
previous swapchain implementation, until the new one is ready.
In order to support both the "old" implementation-based swapchains and
the "new" surface-based swapchains. SwapChainBase is now split into
three abstract classes:
- SwapChainBase that has a virtual method for each of the
wgpu::SwapChain methods.
- OldSwapChainBase that corresponds to the implementation-based
swapchains.
- NewSwapChainBase that will contain the surface-based swapchain
implementation and will eventually just be renamed to SwapChainBase.
The interaction of the surface-based swapchains with the Surface objects
aren't implemented yet, neither are the swapchain methods. Only creation
works.
Validation tests for surface-based swapchain creation are added in the
end2end test target because they need to create OS windows.
Bug: dawn:269
Change-Id: I7e07d6c666479867b9a16d7b1b8c181d5dbd69a0
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/15281
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Austin Eng <enga@chromium.org>
This macro is used only for testing texture zero initialization so it
didn't need to be in DawnTest.h
Bug:
Change-Id: Ifb7ed06d93ae1bc275c9fd4650858c9b27117b5e
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/15360
Reviewed-by: Austin Eng <enga@chromium.org>
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
This includes moving the destruction of vkDevice from Destroy to the
Device Destructor since we need vkDevice to destroy child objects.
Bug: dawn:68
Change-Id: Id477206b2e3f80138b3708eedcee073303f1b696
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/15220
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Austin Eng <enga@chromium.org>
Commit-Queue: Natasha Lee <natlee@microsoft.com>
- Fix a warning on 32bit for converting uint64_t to size_t for the
buffer mapped range.
- Fix a macro redifinition caused by including glfw3.h before windows.h
Bug:
Change-Id: I3897af55679d943b1dfc34b93bba7bd25d8fb7d6
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/15320
Reviewed-by: Austin Eng <enga@chromium.org>
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
This test often crashes on first run, but succeeds on retry.
Bug: dawn:145
Change-Id: I44303a01eaceded10ba277a837c5b5e7649df033
Tbr: cwallez@chromium.org
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/15180
Reviewed-by: Austin Eng <enga@chromium.org>
Commit-Queue: Austin Eng <enga@chromium.org>
Handle DeviceLostCallback once DeviceLost error occurs.
Disallow any other commands or actions on device to happen after device
has been lost.
Bug: dawn:68
Change-Id: Icbbbadf278cae5e6213050d00439118789c863dc
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/12801
Commit-Queue: Natasha Lee <natlee@microsoft.com>
Reviewed-by: Austin Eng <enga@chromium.org>
This is a reland of 2b3975f808fd6f5afc5a52e58a3dcd5e73984b17
The previous CL failed to retain autoreleased ObjC objects which
should live longer than the autoreleasepool block. This reland fixes
the issue and adds tests for it.
Original change's description:
> Metal: Add CommandRecordingContext
>
> Introduces the idea of a CommandRecordingContext to the Metal backend,
> similar to other backends. This is a class to track which Metal encoder
> is open on the device-global pending MTLCommandBuffer.
> It will be needed to open/close encoders for lazy clearing.
>
> Bug: dawn:145
> Change-Id: Ief6b71a079d73943677d2b61382d1c36b88a4f87
> Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/14780
> Reviewed-by: Corentin Wallez <cwallez@chromium.org>
> Reviewed-by: Kai Ninomiya <kainino@chromium.org>
> Commit-Queue: Austin Eng <enga@chromium.org>
Bug: dawn:145
Change-Id: I67494b35225ce8f6443a3fa9787d054522e5d422
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/15042
Commit-Queue: Austin Eng <enga@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
This is another step to implement webgpu.h swapchains, Surface is
essentially a union type of all the types of windows that can be used to
create swapchains.
Changes to allow implementing wgpu::Surface and test its creation are:
- Add GLFWUtils.cpp/.h/_metal.mm that contains helpers used to use
WebGPU with GLFW. This deprecates BackendBinding.h that will be removed
when the NXT swapchain is removed.
- Add a `dawn_use_x11` GN variable to factor all the places in BUILD.gn
where we checked whether we should use X11.
- Add a `supports_glfw_for_windowing` GN variable in the main BUILD.gn
file to control which configuration tests and samples using GLFW can be
built.
- Add a ObjCUtils.h to contain some ObjC functionality that we'd need
in files that otherwise would be C++ (so that they can be compiled on
all platforms).
Bug: dawn:269
Change-Id: I25548142a1d1d1f05b0f4d71aa3bdc4698d19622
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/15081
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Kai Ninomiya <kainino@chromium.org>
struct WGPUChainedStruct {
WGPUChainedStruct const * nextInChain;
WGPUSType sType;
};
And changes all the nextInChain to point to such structures. This adds
more type safety to extension structs and requires less casting to check
sTypes and friends.
Bug: dawn:269
Change-Id: I443f363cdb55dbec7c7f6e897245d4a7ea0ebe70
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/15080
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Kai Ninomiya <kainino@chromium.org>
This patch adds validations to the texture usage "Storage" when
creating a texture.
1. "Storage" usage cannot be used when SampleCount > 1
2. "Storage" usage can only be used with some texture formats. The
list of the formats can be found through the following link:
https://github.com/gpuweb/gpuweb/issues/513
BUG=dawn:267
TEST=dawn_unittests
Change-Id: Ifc7296d966ac0c600433948a63c3dd6a436c8d8b
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/15040
Reviewed-by: Kai Ninomiya <kainino@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Austin Eng <enga@chromium.org>
Commit-Queue: Jiawei Shao <jiawei.shao@intel.com>
Now ComputeCopyStorageBufferTests.SizedArrayOfStruct can pass on all
backends with the fix in the latest SPIRV-Cross.
BUG=chromium:1037829
TEST=dawn_end2end_tests
Change-Id: I20103c3b0848da394e82912f59548a71a3273ac1
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/15020
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
The way in which the Result class is used in Dawn can be fragile
with respect to memory management because the caller of AcquireError
must know they need to delete the returned pointer or a memory leak
will occur. We've had a couple of instances where developers have
accidentally left out the delete call and managed to get past code
review.
This CL changes the Result class so that it assumes the error is
allocated on the heap and forces the caller to use unique_ptr when
calling AcquireError.
Bug:dawn:320
Change-Id: I13ec953b0c37eaafbd6ce93c2f719b4743676acb
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/14960
Reviewed-by: Austin Eng <enga@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Rafael Cintron <rafael.cintron@microsoft.com>
The padded matrix issue in MSL has been fixed in SPIRV-Cross, and
it's updated in https://dawn-review.googlesource.com/c/dawn/+/13421,
so we can add BindGroupTests.MultipleBindLayouts back.
Bug: dawn:33
Change-Id: I8847ab536ebfd779219a1c6d0e1a9a128adf7e85
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/13560
Commit-Queue: Hao Li <hao.x.li@intel.com>
Reviewed-by: Jiawei Shao <jiawei.shao@intel.com>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
The dawn_native::Adapter::GetPCIInfo/GetBackendType/GetDeviceType
methods are now deprecated in favor of a method returning a webgpu.h
AdapterProperties structure. Deprecated function are still available to
avoid breaking Chromium or Skia compilation.
This reduces the difference between dawn.json and webgpu.h
BUG=dawn:160
Change-Id: Ib68fe1c4d1d87676c01c212c91f80fdd26056c56
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/14541
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Kai Ninomiya <kainino@chromium.org>
This is the first step in making the API before WGPUDevice creation
match webgpu.h and is necessary to implement WGPUSwapChain.
BUG=dawn:269
Change-Id: If92ced42d7683d79e67c02738949ff8b483d22c4
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/14061
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Kai Ninomiya <kainino@chromium.org>
This patch makes GetProcs() a static member function of WireClient so
that we can call it without creating a WireClient object.
BUG=chromium:996713
Change-Id: I499be0cd2c5a5f29c796d3be88ce33c1b70711d6
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/14942
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Austin Eng <enga@chromium.org>
Commit-Queue: Jiawei Shao <jiawei.shao@intel.com>
Due to significant performance regressions on Intel Gen11 Graphics,
temporarily disable use of the D3D12 Render Pass API until a workaround
infrastructure can be implemented.
Bug: dawn:310
Change-Id: I994a2c2a0f6a3b61c48b083c73d6e0d3f8910dfa
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/14663
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Brandon Jones <brandon1.jones@intel.com>
jsoncpp causes some flaky failures because of inconsistencies in nested
DEPS. We barely use it for JSON serialization so the simplest solution
is to just manually write the serialization for perf test tracing data.
Bug: dawn:208
Change-Id: Ie5e4b5436e2c9e32e6817d64c6e95c774cb8751f
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/14720
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Kai Ninomiya <kainino@chromium.org>
Commit-Queue: Austin Eng <enga@chromium.org>
Results should be printed METRIC: STORY, not the other way around.
Also, story names shouldn't have slashes as it will parse as separate
chart segments and won't be allowed when we switch to using histograms.
Bug: dawn:208, dawn:311
Change-Id: Ifc893e5aa94eddcb3a08c0d4aff66b7a0f41620b
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/14740
Commit-Queue: Austin Eng <enga@chromium.org>
Reviewed-by: Kai Ninomiya <kainino@chromium.org>
Writable storage buffer in vertex shader is an optional feature.
It is not supported in many devices/OSes. WebGPU doesn't support
writable storage buffer in vertex shader. This change generates an
error for storage buffer binding for vertex shader stage, in order
to disallow writable storage buffer in vertex shader.
This change also adds a validation test and revises existing
end2end tests and validation tests accordingly.
BUG=dawn:180
Change-Id: I9def918d19f65aab45a31acb985c1a0a09c97ca8
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/14521
Commit-Queue: Yunchao He <yunchao.he@intel.com>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Austin Eng <enga@chromium.org>
This is a cleanup patch which changes the WireServer interface to
a CommandHandler interface in the DawnTest tracing layer. It also fixes
the opening mode flags on the output stream which was missing an output
usage.
Bug: dawn:295
Change-Id: I5b154e5201f8215b4dafc6389ebf1ec977a09c05
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/14620
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Kai Ninomiya <kainino@chromium.org>
Commit-Queue: Austin Eng <enga@chromium.org>
BUG=dawn:291
Change-Id: I3e76749bcff8d7635d9dc02de0a9a66b686cd9d8
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/14622
Commit-Queue: Ryan Harrison <rharrison@chromium.org>
Reviewed-by: Austin Eng <enga@chromium.org>
Allocating buffers with sizes close to UINT64_MAX caused issues in all
Vulkan drivers. See https://gitlab.khronos.org/vulkan/vulkan/issues/1904
for more context. Do early validation to prevent such cases from
reaching the driver.
Bug: dawn:241
Fixed: dawn:241
Change-Id: I7edbb25999b4c11767047518b69edc1fa624cd3b
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/14641
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Austin Eng <enga@chromium.org>
This will enable fuzzing the Vulkan backend with randomly injected
errors to help ensure the backend properly handles all errors. It also
redefines VkResult in the dawn_native::vulkan namespace such that a
VkResult cannot be used unless it is explicitly wrapped.
Bug: dawn:295
Change-Id: I3ab2f98702a67a61afe06315658a9ab76ed4ccc3
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/14520
Commit-Queue: Austin Eng <enga@chromium.org>
Reviewed-by: Kai Ninomiya <kainino@chromium.org>
As part of moving to webgpu.h's version of the Instance, the setters
will be replaced with a descriptor, and getters don't usually exists for
things set with descriptors (except getBindGroupLayout).
BUG=dawn:22
Change-Id: I05be8ebf241b33d019d521e40bfef8e49cdab07d
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/14540
Reviewed-by: Austin Eng <enga@chromium.org>
Reviewed-by: Kai Ninomiya <kainino@chromium.org>
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
BUG=dawn:303
Change-Id: Iff1903aecae4c043b222208b3eab5efdf9774b52
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/14501
Commit-Queue: Ryan Harrison <rharrison@chromium.org>
Reviewed-by: Austin Eng <enga@chromium.org>
Also changes the sampler validation to allow INFINITY and only check for
NaN.
BUG=dawn:296
Change-Id: I2a61df807d37dcaf280b12a1ffe56dc670d0f455
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/14480
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Austin Eng <enga@chromium.org>
Reviewed-by: Kai Ninomiya <kainino@chromium.org>
This patch adds two missing checks on the render pass descriptor:
1. NaN is not allowed to be a value of clearColor and clearDepth.
2. Ensure only valid values can be used as loadOp and storeOp.
This patch also adds the unit tests to ensure INFINITY is a valid
value for both clearColor and clearDepth.
BUG=dawn:299
Change-Id: Ia5500701ccd99abf488a80c87adb809521d7873f
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/14460
Reviewed-by: Austin Eng <enga@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Jiawei Shao <jiawei.shao@intel.com>
On Android printing to stdout doesn't show in logcat. Use InfoLog
instead of fprintf(stdout) so that the message get routed to
android_log.
BUG=dawn:286
Change-Id: I067a12d8a790e42d75617c760a2693a3d94ebda6
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/14481
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Kai Ninomiya <kainino@chromium.org>
This adds an argument to Dawn tests to use an intermediate
command handler which dumps command traces. In the near term, this will
be useful to generate a seed corpus for fuzzing. In the future, we may
be able to use the layer to produce reproducible traces of real
applications.
Bug: dawn:295
Change-Id: Ie36d10f4b46f4b16a3ad3ea34961fd38ba8041aa
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/14241
Commit-Queue: Austin Eng <enga@chromium.org>
Reviewed-by: Kai Ninomiya <kainino@chromium.org>
Note that storage buffer and readonly storage buffer may not be
supported in vertex shader on OpenGL backend. In OpenGL Spec 4.6,
the minimum value of MAX_VERTEX_SHADER_STORAGE_BLOCKS is 0.
BUG=dawn:180, dawn:284
Change-Id: Ib637a61e4eee0a0996c0da33f492e075fd94e1e7
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/14380
Commit-Queue: Yunchao He <yunchao.he@intel.com>
Reviewed-by: Austin Eng <enga@chromium.org>
This change implements D3D12 backend for readonly storage buffer.
It uses SRV in root signature at API side and ByteAddressBuffer at
shader side (has already been done in spirv-cross) for readonly
storage buffer.
BUG=dawn:180, dawn:284
Change-Id: Iafcd24835a75349ce719e9735752de50210a846f
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/14300
Reviewed-by: Austin Eng <enga@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Yunchao He <yunchao.he@intel.com>
The LogMessage::LogMessage constructor was redefining a symbol that
exists in re2 inside of Chromium. So we namespace Log inside dawn:: to
avoid the conflict.
BUG=dawn:302
Change-Id: Ida349208e2c6fe9ac032e1bd8cd442dff0b3f6bc
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/14320
Commit-Queue: Austin Eng <enga@chromium.org>
Reviewed-by: Austin Eng <enga@chromium.org>
This change implements Vulkan backend for readonly storage buffer. It
also adds a few end2end tests to verify the implementation.
BUG=dawn:180
Change-Id: I0d680654fa490192c357eccdcdce8e56a8037bce
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/14200
Commit-Queue: Yunchao He <yunchao.he@intel.com>
Reviewed-by: Austin Eng <enga@chromium.org>
Reviewed-by: Kai Ninomiya <kainino@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
The Vulkan spec mandates support for only one or the other, which is
why we have the concept of a depth24plus format. This also adds a Toggle
to test both formats in DepthStencilStateTests.
Finally this renames ForceWorkarounds to ForceToggles because toggles
can be more than just workarounds.
BUG=dawn:286
Change-Id: I5b5dc582ffd4ee61c51e3e75563aec815c580511
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/14103
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: David Turner <digit@google.com>
On Android iostream doesn't appear in logcat, the system log that's
often used for printf debugging. Introduce Chromium/ANGLE like logging
that looks like the following:
InfoLog() << stuff << stuff;
This makes sure the message is put in logcat on Android and removes
static initializers from <iostream>
BUG=dawn:286
Change-Id: Ie0d018f49bcac1a7b740739a6e59d45ae6728638
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/14102
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: David Turner <digit@google.com>
Reviewed-by: Austin Eng <enga@chromium.org>
