Andy Hovingh
c95f9ed7e0
Initial groundwork in creating WebGPU backend components, namely the instance, adapter, device, and queue. If configured to do so, the backend will print out details about these components. The samples/hellotriangle.cpp was slightly modified to include a webgpu option which allows for exercising the above, but does not yet draw anything to the screen/window. NOTE: This has only been sanity tested with hello triangle on Mac OS and the Android emulator at this time, NOT IOS, Windows, or Linux yet.
54 lines
2.2 KiB
C++
54 lines
2.2 KiB
C++
/*
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* Copyright (C) 2025 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <backend/platforms/WebGPUPlatform.h>
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#include <utils/Panic.h>
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#include <webgpu/webgpu_cpp.h>
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#include <cstdint>
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/**
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* Windows OS specific implementation aspects of the WebGPU backend
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*/
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namespace filament::backend {
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wgpu::Surface WebGPUPlatform::createSurface(void* nativeWindow, uint64_t /*flags*/) {
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// TODO verify this is necessary for Dawn implementation as well:
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// On (at least) NVIDIA drivers, the Vulkan implementation (specifically the call to
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// vkGetPhysicalDeviceSurfaceCapabilitiesKHR()) does not correctly handle the fact that
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// each native window has its own DPI_AWARENESS_CONTEXT, and erroneously uses the context
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// of the calling thread. As a workaround, we set the current thread's DPI_AWARENESS_CONTEXT
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// to that of the native window we've been given. This isn't a perfect solution, because an
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// application could create swap chains on multiple native windows with varying DPI-awareness,
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// but even then, at least one of the windows would be guaranteed to work correctly.
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SetThreadDpiAwarenessContext(GetWindowDpiAwarenessContext((HWND) nativeWindow));
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wgpu::SurfaceSourceWindowsHWND surfaceSourceWin{};
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surfaceSourceWin.hinstance = GetModuleHandle(nullptr);
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surfaceSourceWin.hwnd = nativeWindow;
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wgpu::SurfaceDescriptor surfaceDescriptor{
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.nextInChain = &surfaceSourceWin,
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.label = "windows_surface"
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};
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wgpu::Surface surface = mInstance.CreateSurface(&surfaceDescriptor);
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FILAMENT_CHECK_POSTCONDITION(surface != nullptr) << "Unable to create Windows-backed surface.";
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return surface;
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}
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}// namespace filament::backend
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