| // Copyright 2017 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 "utils/BackendBinding.h" |
| |
| #include "common/Assert.h" |
| #include "dawn_native/NullBackend.h" |
| |
| namespace utils { |
| |
| class NullBinding : public BackendBinding { |
| public: |
| void SetupGLFWWindowHints() override { |
| } |
| dawnDevice CreateDevice() override { |
| // Make an instance and find the null adapter |
| mInstance = std::make_unique<dawn_native::Instance>(); |
| mInstance->DiscoverDefaultAdapters(); |
| |
| std::vector<dawn_native::Adapter> adapters = mInstance->GetAdapters(); |
| for (dawn_native::Adapter adapter : adapters) { |
| if (adapter.GetBackendType() == dawn_native::BackendType::Null) { |
| return adapter.CreateDevice(); |
| } |
| } |
| |
| UNREACHABLE(); |
| return {}; |
| } |
| uint64_t GetSwapChainImplementation() override { |
| if (mSwapchainImpl.userData == nullptr) { |
| mSwapchainImpl = dawn_native::null::CreateNativeSwapChainImpl(); |
| } |
| return reinterpret_cast<uint64_t>(&mSwapchainImpl); |
| } |
| dawnTextureFormat GetPreferredSwapChainTextureFormat() override { |
| return DAWN_TEXTURE_FORMAT_R8_G8_B8_A8_UNORM; |
| } |
| |
| private: |
| std::unique_ptr<dawn_native::Instance> mInstance; |
| dawnSwapChainImplementation mSwapchainImpl = {}; |
| }; |
| |
| BackendBinding* CreateNullBinding() { |
| return new NullBinding; |
| } |
| |
| } // namespace utils |