dawn-cmake/src/dawn_native/XlibXcbFunctions.cpp
Corentin Wallez aa0e1be0e8 Reland "Vulkan: Fallback to XCB for Xlib surfaces"
This is a reland of fb0bf70459c44b31419400598b592eaaae85f932

Reland after making libx11-xcb dynamically loaded since it isn't present
on all Linux deployment targets of Chromium. Also includes a couple of
additional cosmetic changes to d3d12/PlatformFunctions noticed while
looking at it for inspiration.

Original change's description:
> Vulkan: Fallback to XCB for Xlib surfaces
>
> Chromium builds the Vulkan loader without support Xlib (because it
> prefers XCB) which caused Xlib wgpu::SwapChain creation to fail on the
> Vulkan backend.
>
> This CL adds a fallback to use VK_KHR_xcb_surface if VK_KHR_xlib_surface
> isn't present.
>
> Bug: dawn:662
> Change-Id: I0e0128ee6b5c75da03998dbae231d17e48bacc81
> Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/41180
> Reviewed-by: Austin Eng <enga@chromium.org>
> Commit-Queue: Austin Eng <enga@chromium.org>
> Auto-Submit: Corentin Wallez <cwallez@chromium.org>

Bug: dawn:662
Change-Id: I617fcd1059dddfa05c29ac20d77f891ca6962342
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/41380
Reviewed-by: Austin Eng <enga@chromium.org>
Reviewed-by: Jiawei Shao <jiawei.shao@intel.com>
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
Auto-Submit: Corentin Wallez <cwallez@chromium.org>
2021-02-11 08:26:38 +00:00

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// Copyright 2021 The Dawn Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "dawn_native/XlibXcbFunctions.h"
namespace dawn_native {
XlibXcbFunctions::XlibXcbFunctions() {
if (!mLib.Open("libX11-xcb.so.1") ||
!mLib.GetProc(&xGetXCBConnection, "XGetXCBConnection")) {
mLib.Close();
}
}
XlibXcbFunctions::~XlibXcbFunctions() = default;
bool XlibXcbFunctions::IsLoaded() const {
return xGetXCBConnection != nullptr;
}
} // namespace dawn_native