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// Copyright 2019 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/d3d12/D3D12Info.h"
#include "common/GPUInfo.h"
#include "dawn_native/d3d12/AdapterD3D12.h"
#include "dawn_native/d3d12/BackendD3D12.h"
#include "dawn_native/d3d12/D3D12Error.h"
#include "dawn_native/d3d12/PlatformFunctions.h"
namespace dawn_native { namespace d3d12 {
ResultOrError<D3D12DeviceInfo> GatherDeviceInfo(const Adapter& adapter) {
D3D12DeviceInfo info = {};
// Newer builds replace D3D_FEATURE_DATA_ARCHITECTURE with
// D3D_FEATURE_DATA_ARCHITECTURE1. However, D3D_FEATURE_DATA_ARCHITECTURE can be used
// for backwards compat.
// https://docs.microsoft.com/en-us/windows/desktop/api/d3d12/ne-d3d12-d3d12_feature
D3D12_FEATURE_DATA_ARCHITECTURE arch = {};
DAWN_TRY(CheckHRESULT(adapter.GetDevice()->CheckFeatureSupport(D3D12_FEATURE_ARCHITECTURE,
&arch, sizeof(arch)),
"ID3D12Device::CheckFeatureSupport"));
info.isUMA = arch.UMA;
D3D12_FEATURE_DATA_D3D12_OPTIONS options = {};
DAWN_TRY(CheckHRESULT(adapter.GetDevice()->CheckFeatureSupport(D3D12_FEATURE_D3D12_OPTIONS,
&options, sizeof(options)),
"ID3D12Device::CheckFeatureSupport"));
info.resourceHeapTier = options.ResourceHeapTier;
// Windows builds 1809 and above can use the D3D12 render pass API. If we query
// CheckFeatureSupport for D3D12_FEATURE_D3D12_OPTIONS5 successfully, then we can use
// the render pass API.
info.supportsRenderPass = false;
D3D12_FEATURE_DATA_D3D12_OPTIONS5 featureOptions5 = {};
if (SUCCEEDED(adapter.GetDevice()->CheckFeatureSupport(
D3D12_FEATURE_D3D12_OPTIONS5, &featureOptions5, sizeof(featureOptions5)))) {
// Performance regressions been observed when using a render pass on Intel graphics with
// RENDER_PASS_TIER_1 available, so fall back to a software emulated render pass on
// these platforms.
if (featureOptions5.RenderPassesTier < D3D12_RENDER_PASS_TIER_1 ||
!gpu_info::IsIntel(adapter.GetPCIInfo().vendorId)) {
info.supportsRenderPass = true;
}
}
return info;
}
}} // namespace dawn_native::d3d12
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