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Examples: Emscripten+WebGPU: Align WebGPU setup with other examples
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SlowRiot
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@ -38,101 +38,6 @@ static int wgpu_surface_height = 800;
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static bool InitWGPU();
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static void GetFramebufferSizeFromDisplaySize(int width, int height, int* framebuffer_width, int* framebuffer_height);
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static void ResizeSurface(int width, int height);
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static WGPUAdapter RequestAdapter(wgpu::Instance& instance);
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static WGPUDevice RequestDevice(wgpu::Instance& instance, wgpu::Adapter& adapter);
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static WGPUAdapter RequestAdapter(wgpu::Instance& instance)
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{
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wgpu::Adapter acquired_adapter;
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wgpu::RequestAdapterOptions adapter_options;
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auto onRequestAdapter = [&](wgpu::RequestAdapterStatus status, wgpu::Adapter adapter, wgpu::StringView message)
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{
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if (status != wgpu::RequestAdapterStatus::Success)
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{
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printf("Failed to get an adapter: %s\n", message.data);
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return;
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}
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acquired_adapter = std::move(adapter);
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};
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// Synchronously (wait until) acquire Adapter
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wgpu::Future wait_adapter_func { instance.RequestAdapter(&adapter_options, wgpu::CallbackMode::WaitAnyOnly, onRequestAdapter) };
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wgpu::WaitStatus wait_status_adapter = instance.WaitAny(wait_adapter_func, UINT64_MAX);
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IM_ASSERT(acquired_adapter != nullptr && wait_status_adapter == wgpu::WaitStatus::Success && "Error on Adapter request");
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return acquired_adapter.MoveToCHandle();
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}
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static WGPUDevice RequestDevice(wgpu::Instance& instance, wgpu::Adapter& adapter)
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{
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// Set device callback functions
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wgpu::DeviceDescriptor device_desc;
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device_desc.SetDeviceLostCallback(wgpu::CallbackMode::AllowSpontaneous,
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[](const wgpu::Device&, wgpu::DeviceLostReason type, wgpu::StringView msg) { fprintf(stderr, "%s error: %s\n", ImGui_ImplWGPU_GetDeviceLostReasonName((WGPUDeviceLostReason)type), msg.data); }
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);
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device_desc.SetUncapturedErrorCallback(
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[](const wgpu::Device&, wgpu::ErrorType type, wgpu::StringView msg) { fprintf(stderr, "%s error: %s\n", ImGui_ImplWGPU_GetErrorTypeName((WGPUErrorType)type), msg.data); }
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);
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wgpu::Device acquired_device;
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auto onRequestDevice = [&](wgpu::RequestDeviceStatus status, wgpu::Device local_device, wgpu::StringView message)
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{
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if (status != wgpu::RequestDeviceStatus::Success)
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{
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printf("Failed to get a device: %s\n", message.data);
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return;
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}
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acquired_device = std::move(local_device);
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};
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// Synchronously (wait until) get Device
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wgpu::Future wait_device_func { adapter.RequestDevice(&device_desc, wgpu::CallbackMode::WaitAnyOnly, onRequestDevice) };
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wgpu::WaitStatus wait_status_device = instance.WaitAny(wait_device_func, UINT64_MAX);
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IM_ASSERT(acquired_device != nullptr && wait_status_device == wgpu::WaitStatus::Success && "Error on Device request");
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return acquired_device.MoveToCHandle();
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}
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static bool InitWGPU()
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{
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WGPUTextureFormat preferred_fmt = WGPUTextureFormat_Undefined;
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wgpu::InstanceDescriptor instance_desc = {};
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static constexpr wgpu::InstanceFeatureName timedWaitAny = wgpu::InstanceFeatureName::TimedWaitAny;
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instance_desc.requiredFeatureCount = 1;
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instance_desc.requiredFeatures = &timedWaitAny;
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wgpu::Instance instance = wgpu::CreateInstance(&instance_desc);
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wgpu::Adapter adapter = RequestAdapter(instance);
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ImGui_ImplWGPU_DebugPrintAdapterInfo(adapter.Get());
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wgpu_device = RequestDevice(instance, adapter);
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wgpu::EmscriptenSurfaceSourceCanvasHTMLSelector canvas_desc = {};
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canvas_desc.selector = "#canvas";
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wgpu::SurfaceDescriptor surface_desc = {};
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surface_desc.nextInChain = &canvas_desc;
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wgpu_surface = instance.CreateSurface(&surface_desc).MoveToCHandle();
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if (!wgpu_surface) return false;
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wgpu_instance = instance.MoveToCHandle();
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WGPUSurfaceCapabilities surface_capabilities = {};
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wgpuSurfaceGetCapabilities(wgpu_surface, adapter.Get(), &surface_capabilities);
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preferred_fmt = surface_capabilities.formats[0];
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wgpu_surface_configuration.presentMode = WGPUPresentMode_Fifo;
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wgpu_surface_configuration.alphaMode = WGPUCompositeAlphaMode_Auto;
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wgpu_surface_configuration.usage = WGPUTextureUsage_RenderAttachment;
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wgpu_surface_configuration.width = wgpu_surface_width;
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wgpu_surface_configuration.height = wgpu_surface_height;
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wgpu_surface_configuration.device = wgpu_device;
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wgpu_surface_configuration.format = preferred_fmt;
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wgpuSurfaceConfigure(wgpu_surface, &wgpu_surface_configuration);
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wgpu_queue = wgpuDeviceGetQueue(wgpu_device);
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return true;
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}
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static void GetFramebufferSizeFromDisplaySize(int width, int height, int* framebuffer_width, int* framebuffer_height)
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{
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@ -339,3 +244,102 @@ int main(int, char**)
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return 0;
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}
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static WGPUAdapter RequestAdapter(wgpu::Instance& instance)
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{
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wgpu::Adapter acquired_adapter;
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wgpu::RequestAdapterOptions adapter_options;
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auto onRequestAdapter = [&](wgpu::RequestAdapterStatus status, wgpu::Adapter adapter, wgpu::StringView message)
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{
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if (status != wgpu::RequestAdapterStatus::Success)
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{
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printf("Failed to get an adapter: %s\n", message.data);
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return;
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}
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acquired_adapter = std::move(adapter);
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};
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// Synchronously (wait until) acquire Adapter
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wgpu::Future waitAdapterFunc { instance.RequestAdapter(&adapter_options, wgpu::CallbackMode::WaitAnyOnly, onRequestAdapter) };
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wgpu::WaitStatus waitStatusAdapter = instance.WaitAny(waitAdapterFunc, UINT64_MAX);
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IM_ASSERT(acquired_adapter != nullptr && waitStatusAdapter == wgpu::WaitStatus::Success && "Error on Adapter request");
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return acquired_adapter.MoveToCHandle();
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}
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static WGPUDevice RequestDevice(wgpu::Instance& instance, wgpu::Adapter& adapter)
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{
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// Set device callback functions
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wgpu::DeviceDescriptor device_desc;
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device_desc.SetDeviceLostCallback(wgpu::CallbackMode::AllowSpontaneous,
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[](const wgpu::Device&, wgpu::DeviceLostReason type, wgpu::StringView msg) { fprintf(stderr, "%s error: %s\n", ImGui_ImplWGPU_GetDeviceLostReasonName((WGPUDeviceLostReason)type), msg.data); }
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);
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device_desc.SetUncapturedErrorCallback(
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[](const wgpu::Device&, wgpu::ErrorType type, wgpu::StringView msg) { fprintf(stderr, "%s error: %s\n", ImGui_ImplWGPU_GetErrorTypeName((WGPUErrorType)type), msg.data); }
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);
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wgpu::Device acquired_device;
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auto onRequestDevice = [&](wgpu::RequestDeviceStatus status, wgpu::Device local_device, wgpu::StringView message)
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{
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if (status != wgpu::RequestDeviceStatus::Success)
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{
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printf("Failed to get a device: %s\n", message.data);
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return;
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}
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acquired_device = std::move(local_device);
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};
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// Synchronously (wait until) get Device
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wgpu::Future waitDeviceFunc { adapter.RequestDevice(&device_desc, wgpu::CallbackMode::WaitAnyOnly, onRequestDevice) };
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wgpu::WaitStatus waitStatusDevice = instance.WaitAny(waitDeviceFunc, UINT64_MAX);
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IM_ASSERT(acquired_device != nullptr && waitStatusDevice == wgpu::WaitStatus::Success && "Error on Device request");
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return acquired_device.MoveToCHandle();
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}
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static bool InitWGPU()
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{
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WGPUTextureFormat preferred_fmt = WGPUTextureFormat_Undefined; // acquired from SurfaceCapabilities
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// Google DAWN backend: Adapter and Device acquisition, Surface creation
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wgpu::InstanceDescriptor instance_desc = {};
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static constexpr wgpu::InstanceFeatureName timedWaitAny = wgpu::InstanceFeatureName::TimedWaitAny;
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instance_desc.requiredFeatureCount = 1;
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instance_desc.requiredFeatures = &timedWaitAny;
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wgpu::Instance instance = wgpu::CreateInstance(&instance_desc);
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wgpu::Adapter adapter = RequestAdapter(instance);
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ImGui_ImplWGPU_DebugPrintAdapterInfo(adapter.Get());
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wgpu_device = RequestDevice(instance, adapter);
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// Create the surface.
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wgpu::EmscriptenSurfaceSourceCanvasHTMLSelector canvas_desc = {};
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canvas_desc.selector = "#canvas";
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wgpu::SurfaceDescriptor surface_desc = {};
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surface_desc.nextInChain = &canvas_desc;
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wgpu::Surface surface = instance.CreateSurface(&surface_desc);
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if (!surface)
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return false;
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// Moving Dawn objects into WGPU handles
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wgpu_instance = instance.MoveToCHandle();
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wgpu_surface = surface.MoveToCHandle();
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WGPUSurfaceCapabilities surface_capabilities = {};
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wgpuSurfaceGetCapabilities(wgpu_surface, adapter.Get(), &surface_capabilities);
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preferred_fmt = surface_capabilities.formats[0];
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wgpu_surface_configuration.presentMode = WGPUPresentMode_Fifo;
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wgpu_surface_configuration.alphaMode = WGPUCompositeAlphaMode_Auto;
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wgpu_surface_configuration.usage = WGPUTextureUsage_RenderAttachment;
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wgpu_surface_configuration.width = wgpu_surface_width;
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wgpu_surface_configuration.height = wgpu_surface_height;
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wgpu_surface_configuration.device = wgpu_device;
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wgpu_surface_configuration.format = preferred_fmt;
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wgpuSurfaceConfigure(wgpu_surface, &wgpu_surface_configuration);
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wgpu_queue = wgpuDeviceGetQueue(wgpu_device);
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return true;
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}
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