CMake-only fork of https://dawn.googlesource.com/dawn with cleaned, vendored dependencies
1c4a7f780f
This patch fixes the issues on the initialization of buffers with MapRead usage and mappedAtCreation == true. 1. The buffers with MapRead usage and mappedAtCreation == true can be read from the CPU side just after the creation of the buffer, however at that time the internal pending command buffers may not be executed, thus causing the buffer is not cleared as is expected. 2. On D3D12 the buffer with MapRead and mappedAtCreation == true is created on the READBACK heap, so all the data written in the CPU side cannot be uploaded to the GPU memory. When the buffer is mapped again all the original data written through the CPU pointer will be overwritten by the data in the GPU memory (which means it is also cleared to 0). This patch fixes this issue by: 1. clearing the buffers with mappedAtCreation == true on the CPU side. 2. on D3D12 making the buffer with MapRead and mappedAtCreation == true use the staging buffer instead of mapping itself. Note that this change is only related to the code path with Toggle "nonzero_clear_resources_on_creation_for_testing" enabled, currently we don't plan to do the similar change when we enable Dawn wire. BUG=dawn:414 TEST=dawn_end2end_tests Change-Id: I2b3d0840333e8d99759800ab9fc141d0a7cf2f8d Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/27220 Reviewed-by: Corentin Wallez <cwallez@chromium.org> Commit-Queue: Jiawei Shao <jiawei.shao@intel.com> |
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| CONTRIBUTING.md | ||
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| README.chromium | ||
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| dawn.json | ||
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README.md
Dawn, a WebGPU implementation
Dawn is an open-source and cross-platform implementation of the work-in-progress WebGPU standard.
More precisely it implements webgpu.h that is a one-to-one mapping with the WebGPU IDL.
Dawn is meant to be integrated as part of a larger system and is the underlying implementation of WebGPU in Chromium.
Dawn provides several WebGPU building blocks:
- WebGPU C/C++ headers that applications and other building blocks use.
- The
webgpu.hversion that Dawn implements. - A C++ wrapper for the
webgpu.h.
- The
- A "native" implementation of WebGPU using platforms' GPU APIs:
- D3D12 on Windows 10
- Metal on macOS and iOS
- Vulkan on Windows, Linux, ChromeOS, Android and Fuchsia
- OpenGL as best effort where available
- A client-server implementation of WebGPU for applications that are in a sandbox without access to native drivers
Helpful links:
- Dawn's bug tracker if you find issues with Dawn.
- Dawn's mailing list for other discussions related to Dawn.
- Dawn's source code
- Dawm's Matrix chatroom for live discussion around contributing or using Dawn.
- WebGPU's Matrix chatroom
Documentation table of content
Developer documentation:
User documentation: (TODO, figure out what overlaps with webgpu.h docs)
Status
(TODO)
License
Apache 2.0 Public License, please see LICENSE.
Disclaimer
This is not an officially supported Google product.