// 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 INCLUDE_DAWN_DAWN_WSI_H_ #define INCLUDE_DAWN_DAWN_WSI_H_ #include "dawn/webgpu.h" // Error message (or nullptr if there was no error) typedef const char* DawnSwapChainError; constexpr DawnSwapChainError DAWN_SWAP_CHAIN_NO_ERROR = nullptr; typedef struct { /// Backend-specific texture id/name/pointer union { void* ptr; uint64_t u64; uint32_t u32; } texture; } DawnSwapChainNextTexture; typedef struct { /// Initialize the swap chain implementation. /// (*wsiContext) is one of DawnWSIContext{D3D12,Metal,GL} void (*Init)(void* userData, void* wsiContext); /// Destroy the swap chain implementation. void (*Destroy)(void* userData); /// Configure/reconfigure the swap chain. DawnSwapChainError (*Configure)(void* userData, WGPUTextureFormat format, WGPUTextureUsage allowedUsage, uint32_t width, uint32_t height); /// Acquire the next texture from the swap chain. DawnSwapChainError (*GetNextTexture)(void* userData, DawnSwapChainNextTexture* nextTexture); /// Present the last acquired texture to the screen. DawnSwapChainError (*Present)(void* userData); /// Each function is called with userData as its first argument. void* userData; /// For use by the D3D12 and Vulkan backends: how the swapchain will use the texture. WGPUTextureUsage textureUsage; } DawnSwapChainImplementation; #if defined(DAWN_ENABLE_BACKEND_D3D12) && defined(__cplusplus) struct DawnWSIContextD3D12 { WGPUDevice device = nullptr; }; #endif #if defined(DAWN_ENABLE_BACKEND_METAL) && defined(__OBJC__) #import <Metal/Metal.h> struct DawnWSIContextMetal { id<MTLDevice> device = nil; id<MTLCommandQueue> queue = nil; }; #endif #ifdef DAWN_ENABLE_BACKEND_OPENGL typedef struct { } DawnWSIContextGL; #endif #ifdef DAWN_ENABLE_BACKEND_VULKAN typedef struct { } DawnWSIContextVulkan; #endif #endif // INCLUDE_DAWN_DAWN_WSI_H_