| // 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. |
| |
| #ifndef DAWNNATIVE_SWAPCHAIN_H_ |
| #define DAWNNATIVE_SWAPCHAIN_H_ |
| |
| #include "dawn_native/Error.h" |
| #include "dawn_native/Forward.h" |
| #include "dawn_native/ObjectBase.h" |
| |
| #include "dawn/dawn_wsi.h" |
| #include "dawn_native/dawn_platform.h" |
| |
| namespace dawn_native { |
| |
| MaybeError ValidateSwapChainDescriptor(const DeviceBase* device, |
| const Surface* surface, |
| const SwapChainDescriptor* descriptor); |
| |
| TextureDescriptor GetSwapChainBaseTextureDescriptor(NewSwapChainBase* swapChain); |
| |
| class SwapChainBase : public ObjectBase { |
| public: |
| SwapChainBase(DeviceBase* device); |
| |
| static SwapChainBase* MakeError(DeviceBase* device); |
| |
| // Dawn API |
| virtual void Configure(wgpu::TextureFormat format, |
| wgpu::TextureUsage allowedUsage, |
| uint32_t width, |
| uint32_t height) = 0; |
| virtual TextureViewBase* GetCurrentTextureView() = 0; |
| virtual void Present() = 0; |
| |
| protected: |
| SwapChainBase(DeviceBase* device, ObjectBase::ErrorTag tag); |
| ~SwapChainBase() override; |
| }; |
| |
| // The base class for implementation-based SwapChains that are deprecated. |
| class OldSwapChainBase : public SwapChainBase { |
| public: |
| OldSwapChainBase(DeviceBase* device, const SwapChainDescriptor* descriptor); |
| |
| static SwapChainBase* MakeError(DeviceBase* device); |
| |
| // Dawn API |
| void Configure(wgpu::TextureFormat format, |
| wgpu::TextureUsage allowedUsage, |
| uint32_t width, |
| uint32_t height) override; |
| TextureViewBase* GetCurrentTextureView() override; |
| void Present() override; |
| |
| protected: |
| ~OldSwapChainBase() override; |
| const DawnSwapChainImplementation& GetImplementation(); |
| virtual TextureBase* GetNextTextureImpl(const TextureDescriptor*) = 0; |
| virtual MaybeError OnBeforePresent(TextureBase* texture) = 0; |
| |
| private: |
| MaybeError ValidateConfigure(wgpu::TextureFormat format, |
| wgpu::TextureUsage allowedUsage, |
| uint32_t width, |
| uint32_t height) const; |
| MaybeError ValidateGetCurrentTextureView() const; |
| MaybeError ValidatePresent() const; |
| |
| DawnSwapChainImplementation mImplementation = {}; |
| wgpu::TextureFormat mFormat = {}; |
| wgpu::TextureUsage mAllowedUsage; |
| uint32_t mWidth = 0; |
| uint32_t mHeight = 0; |
| Ref<TextureBase> mCurrentTexture; |
| Ref<TextureViewBase> mCurrentTextureView; |
| }; |
| |
| // The base class for surface-based SwapChains that aren't ready yet. |
| class NewSwapChainBase : public SwapChainBase { |
| public: |
| NewSwapChainBase(DeviceBase* device, |
| Surface* surface, |
| const SwapChainDescriptor* descriptor); |
| |
| // This is called when the swapchain is detached for any reason: |
| // |
| // - The swapchain is being destroyed. |
| // - The surface it is attached to is being destroyed. |
| // - The swapchain is being replaced by another one on the surface. |
| // |
| // The call for the old swapchain being replaced should be called inside the backend |
| // implementation of SwapChains. This is to allow them to acquire any resources before |
| // calling detach to make a seamless transition from the previous swapchain. |
| // |
| // Likewise the call for the swapchain being destroyed must be done in the backend's |
| // swapchain's destructor since C++ says it is UB to call virtual methods in the base class |
| // destructor. |
| void DetachFromSurface(); |
| |
| // Dawn API |
| void Configure(wgpu::TextureFormat format, |
| wgpu::TextureUsage allowedUsage, |
| uint32_t width, |
| uint32_t height) override; |
| TextureViewBase* GetCurrentTextureView() override; |
| void Present() override; |
| |
| uint32_t GetWidth() const; |
| uint32_t GetHeight() const; |
| wgpu::TextureFormat GetFormat() const; |
| wgpu::TextureUsage GetUsage() const; |
| wgpu::PresentMode GetPresentMode() const; |
| Surface* GetSurface() const; |
| bool IsAttached() const; |
| wgpu::BackendType GetBackendType() const; |
| |
| protected: |
| ~NewSwapChainBase() override; |
| |
| private: |
| bool mAttached; |
| uint32_t mWidth; |
| uint32_t mHeight; |
| wgpu::TextureFormat mFormat; |
| wgpu::TextureUsage mUsage; |
| wgpu::PresentMode mPresentMode; |
| |
| // This is a weak reference to the surface. If the surface is destroyed it will call |
| // DetachFromSurface and mSurface will be updated to nullptr. |
| Surface* mSurface = nullptr; |
| Ref<TextureViewBase> mCurrentTextureView; |
| |
| MaybeError ValidatePresent() const; |
| MaybeError ValidateGetCurrentTextureView() const; |
| |
| // GetCurrentTextureViewImpl and PresentImpl are guaranteed to be called in an interleaved |
| // manner, starting with GetCurrentTextureViewImpl. |
| |
| // The returned texture view must match the swapchain descriptor exactly. |
| virtual ResultOrError<TextureViewBase*> GetCurrentTextureViewImpl() = 0; |
| // The call to present must destroy the current view's texture so further access to it are |
| // invalid. |
| virtual MaybeError PresentImpl() = 0; |
| |
| // Guaranteed to be called exactly once during the lifetime of the SwapChain. After it is |
| // called no other virtual method can be called. |
| virtual void DetachFromSurfaceImpl() = 0; |
| }; |
| |
| } // namespace dawn_native |
| |
| #endif // DAWNNATIVE_SWAPCHAIN_H_ |