| // 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 "dawn/utils/BackendBinding.h" |
| |
| #include "dawn/common/Assert.h" |
| #include "dawn/common/SwapChainUtils.h" |
| #include "dawn/native/MetalBackend.h" |
| |
| #define GLFW_EXPOSE_NATIVE_COCOA |
| #include "GLFW/glfw3.h" |
| #include "GLFW/glfw3native.h" |
| |
| #import <QuartzCore/CAMetalLayer.h> |
| |
| namespace utils { |
| class SwapChainImplMTL { |
| public: |
| using WSIContext = DawnWSIContextMetal; |
| |
| SwapChainImplMTL(id nsWindow) : mNsWindow(nsWindow) {} |
| |
| ~SwapChainImplMTL() { |
| [mCurrentTexture release]; |
| [mCurrentDrawable release]; |
| } |
| |
| void Init(DawnWSIContextMetal* ctx) { |
| mMtlDevice = ctx->device; |
| mCommandQueue = ctx->queue; |
| } |
| |
| DawnSwapChainError Configure(WGPUTextureFormat format, |
| WGPUTextureUsage usage, |
| uint32_t width, |
| uint32_t height) { |
| if (format != WGPUTextureFormat_BGRA8Unorm) { |
| return "unsupported format"; |
| } |
| ASSERT(width > 0); |
| ASSERT(height > 0); |
| |
| NSView* contentView = [mNsWindow contentView]; |
| [contentView setWantsLayer:YES]; |
| |
| CGSize size = {}; |
| size.width = width; |
| size.height = height; |
| |
| mLayer = [CAMetalLayer layer]; |
| [mLayer setDevice:mMtlDevice]; |
| [mLayer setPixelFormat:MTLPixelFormatBGRA8Unorm]; |
| [mLayer setDrawableSize:size]; |
| |
| constexpr uint32_t kFramebufferOnlyTextureUsages = |
| WGPUTextureUsage_RenderAttachment | WGPUTextureUsage_Present; |
| bool hasOnlyFramebufferUsages = !(usage & (~kFramebufferOnlyTextureUsages)); |
| if (hasOnlyFramebufferUsages) { |
| [mLayer setFramebufferOnly:YES]; |
| } |
| |
| [contentView setLayer:mLayer]; |
| |
| return DAWN_SWAP_CHAIN_NO_ERROR; |
| } |
| |
| DawnSwapChainError GetNextTexture(DawnSwapChainNextTexture* nextTexture) { |
| [mCurrentDrawable release]; |
| mCurrentDrawable = [mLayer nextDrawable]; |
| [mCurrentDrawable retain]; |
| |
| [mCurrentTexture release]; |
| mCurrentTexture = mCurrentDrawable.texture; |
| [mCurrentTexture retain]; |
| |
| nextTexture->texture.ptr = reinterpret_cast<void*>(mCurrentTexture); |
| |
| return DAWN_SWAP_CHAIN_NO_ERROR; |
| } |
| |
| DawnSwapChainError Present() { |
| id<MTLCommandBuffer> commandBuffer = [mCommandQueue commandBuffer]; |
| [commandBuffer presentDrawable:mCurrentDrawable]; |
| [commandBuffer commit]; |
| |
| return DAWN_SWAP_CHAIN_NO_ERROR; |
| } |
| |
| private: |
| id mNsWindow = nil; |
| id<MTLDevice> mMtlDevice = nil; |
| id<MTLCommandQueue> mCommandQueue = nil; |
| |
| CAMetalLayer* mLayer = nullptr; |
| id<CAMetalDrawable> mCurrentDrawable = nil; |
| id<MTLTexture> mCurrentTexture = nil; |
| }; |
| |
| class MetalBinding : public BackendBinding { |
| public: |
| MetalBinding(GLFWwindow* window, WGPUDevice device) : BackendBinding(window, device) {} |
| |
| uint64_t GetSwapChainImplementation() override { |
| if (mSwapchainImpl.userData == nullptr) { |
| mSwapchainImpl = |
| CreateSwapChainImplementation(new SwapChainImplMTL(glfwGetCocoaWindow(mWindow))); |
| } |
| return reinterpret_cast<uint64_t>(&mSwapchainImpl); |
| } |
| |
| WGPUTextureFormat GetPreferredSwapChainTextureFormat() override { |
| return WGPUTextureFormat_BGRA8Unorm; |
| } |
| |
| private: |
| DawnSwapChainImplementation mSwapchainImpl = {}; |
| }; |
| |
| BackendBinding* CreateMetalBinding(GLFWwindow* window, WGPUDevice device) { |
| return new MetalBinding(window, device); |
| } |
| } // namespace utils |