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// Copyright 2020 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_SURFACE_H_
#define DAWNNATIVE_SURFACE_H_
#include "common/RefCounted.h"
#include "dawn_native/Error.h"
#include "dawn_native/Forward.h"
#include "dawn_native/dawn_platform.h"
namespace dawn_native {
MaybeError ValidateSurfaceDescriptor(const InstanceBase* instance,
const SurfaceDescriptor* descriptor);
// A surface is a sum types of all the kind of windows Dawn supports. The OS-specific types
// aren't used because they would cause compilation errors on other OSes (or require
// ObjectiveC).
// The surface is also used to store the current swapchain so that we can detach it when it is
// replaced.
class Surface final : public RefCounted {
public:
Surface(InstanceBase* instance, const SurfaceDescriptor* descriptor);
void SetAttachedSwapChain(NewSwapChainBase* swapChain);
NewSwapChainBase* GetAttachedSwapChain();
// These are valid to call on all Surfaces.
enum class Type { MetalLayer, WindowsHWND, Xlib };
Type GetType() const;
InstanceBase* GetInstance();
// Valid to call if the type is MetalLayer
void* GetMetalLayer() const;
// Valid to call if the type is WindowsHWND
void* GetHInstance() const;
void* GetHWND() const;
// Valid to call if the type is WindowsXlib
void* GetXDisplay() const;
uint32_t GetXWindow() const;
private:
~Surface() override;
Ref<InstanceBase> mInstance;
Type mType;
// The swapchain will set this to null when it is destroyed.
Ref<NewSwapChainBase> mSwapChain;
// MetalLayer
void* mMetalLayer = nullptr;
// WindowsHwnd
void* mHInstance = nullptr;
void* mHWND = nullptr;
// Xlib
void* mXDisplay = nullptr;
uint32_t mXWindow = 0;
};
} // namespace dawn_native
#endif // DAWNNATIVE_SURFACE_H_