88 lines
2.0 KiB
C++
88 lines
2.0 KiB
C++
// Copyright (c) 2012-2020 Wojciech Figat. All rights reserved.
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#include "GPUSwapChain.h"
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#include "GPUDevice.h"
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#include "Textures/GPUTexture.h"
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#include "Engine/Core/Log.h"
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class GPUSwapChainDownloadTask : public Task
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{
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friend GPUSwapChain;
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public:
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GPUSwapChain* SwapChain;
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GPUTexture* Texture;
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~GPUSwapChainDownloadTask()
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{
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if (Texture)
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Texture->DeleteObject(5);
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}
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String ToString() const override
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{
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return TEXT("GPUSwapChainDownloadTask");
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}
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bool Run() override
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{
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return false;
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}
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void Enqueue() override
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{
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}
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};
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Task* GPUSwapChain::DownloadDataAsync(TextureData& result)
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{
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if (_downloadTask)
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{
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LOG(Warning, "Can download window backuffer data ony once at the time.");
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return nullptr;
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}
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auto texture = GPUDevice::Instance->CreateTexture(String::Empty);
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if (texture->Init(GPUTextureDescription::New2D(GetWidth(), GetHeight(), GetFormat(), GPUTextureFlags::None, 1).ToStagingReadback()))
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{
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LOG(Warning, "Failed to create staging texture for the window swapchain backuffer download.");
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return nullptr;
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}
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auto task = New<GPUSwapChainDownloadTask>();
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task->SwapChain = this;
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task->Texture = texture;
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const auto downloadTask = texture->DownloadDataAsync(result);
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task->ContinueWith(downloadTask);
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_downloadTask = task;
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return task;
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}
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void GPUSwapChain::End(RenderTask* task)
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{
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if (_downloadTask)
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{
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auto downloadTask = (GPUSwapChainDownloadTask*)_downloadTask;
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auto context = GPUDevice::Instance->GetMainContext();
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CopyBackbuffer(context, downloadTask->Texture);
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downloadTask->Execute();
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_downloadTask = nullptr;
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}
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}
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void GPUSwapChain::Present(bool vsync)
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{
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// Check if need to show the window after the 1st paint
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if (_window->_showAfterFirstPaint)
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{
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_window->_showAfterFirstPaint = false;
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_window->Show();
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}
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// Count amount of present calls
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_presentCount++;
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}
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