commit | 72508d6d0634bdb28353c2ec26bbe79307ab916a | [log] [tgz] |
---|---|---|
author | Jiawei Shao <jiawei.shao@intel.com> | Tue Jul 02 23:55:55 2019 +0000 |
committer | Commit Bot service account <commit-bot@chromium.org> | Tue Jul 02 23:55:55 2019 +0000 |
tree | b4b519564a9b5dbb998270aaeca3c56f53a49922 | |
parent | c246494dbf47cb1a10f9b308f6d4bbb745164ed5 [diff] |
Support BC5 formats on Vulkan This patch supports BC5 formats on Vulkan backends and adds related Dawn end2end tests. For the textures with BC formats, they could have non-multiple-of-4 sizes on the non-zero mipmap levels in sampling, but we are still required to provide texture data in complete 4x4 blocks in texture copies because that is the size of which they are stored in GPU memory. In this patch, we refer the term "physical memory size" as the memory size of the texture subresource in GPU memory, and the term "virtual memory size" as the size used in texture sampling. As Dawn requires the Extent3D in texture copies must fit in the physical memory size, while Vulkan requires it must fit in the virtual memory size, this patch recalculates the imageExtent to ensure it always follow this Vulkan validation rules. For Dawn end2end tests, note that we use pure green and pure red for the textures because BC5 does not support SRGB formats. Furthermore, "CopyPartofTextureSubResourceIntoNonZeroMipmapLevel" is skipped in this patch because there is an issue on the T2T copies from a region within the virtual size of one texture to another one that exceeds the virtual size of another texture in Vulkan SPEC. BUG=dawn:42 TEST=dawn_end2end_tests Change-Id: I17518cd335fb13125cb753bbf879bc06eb20e426 Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/8260 Reviewed-by: Corentin Wallez <cwallez@chromium.org> Reviewed-by: Austin Eng <enga@chromium.org> Commit-Queue: Jiawei Shao <jiawei.shao@intel.com>
Dawn (formerly NXT) is an open-source and cross-platform implementation of the work-in-progress WebGPU standard. It exposes a C/C++ API that maps almost one-to-one to the WebGPU IDL and can be managed as part of a larger system such as a Web browser.
Dawn provides several WebGPU building blocks:
dawn.json
: description of the API used to drive code generators.examples
: examples showing how Dawn is used.generator
: code generator for files produces from dawn.json
templates
: Jinja2 templates for the generatorscripts
: scripts to support things like continuous testing, build files, etc.src
:common
: helper code shared between core Dawn libraries and tests/samplesdawn_native
: native implementation of WebGPU, one subfolder per backenddawn_wire
: client-server implementation of WebGPUinclude
: public headers for Dawntests
: internal Dawn testsend2end
: WebGPU tests performing GPU operationsunittests
: unittests and by extension tests not using the GPUvalidation
: WebGPU validation tests not using the GPU (frontend tests)utils
: helper code to use Dawn used by tests and samplesthird_party
: directory where dependencies live as well as their buildfiles.Dawn uses the Chromium build system and dependency management so you need to install depot_tools and add it to the PATH.
On Linux you need to have the pkg-config
command:
# Install pkg-config on Ubuntu sudo apt-get install pkg-config
Then get the source as follows:
# Clone the repo as "dawn" git clone https://dawn.googlesource.com/dawn dawn && cd dawn # Bootstrap the gclient configuration cp scripts/standalone.gclient .gclient # Fetch external dependencies and toolchains with gclient gclient sync
Then generate build files using gn args out/Debug
or gn args out/Release
. A text editor will appear asking build options, the most common option is is_debug=true/false
; otherwise gn args out/Release --list
shows all the possible options.
Then use ninja -C out/Release
to build dawn and for example ./out/Release/dawn_end2end_tests
to run the tests.
Please read and follow CONTRIBUTING.md. Dawn doesn‘t have a formal coding style yet, except what’s defined by our clang format style. Overall try to use the same style and convention as code around your change.
If you find issues with Dawn, please feel free to report them on the bug tracker. For other discussions, please post to Dawn's mailing list.
Please see LICENSE.
This is not an officially supported Google product.