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/*
* Copyright 2019-2021 Diligent Graphics LLC
* Copyright 2015-2019 Egor Yusov
*
* 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.
*
* In no event and under no legal theory, whether in tort (including negligence),
* contract, or otherwise, unless required by applicable law (such as deliberate
* and grossly negligent acts) or agreed to in writing, shall any Contributor be
* liable for any damages, including any direct, indirect, special, incidental,
* or consequential damages of any character arising as a result of this License or
* out of the use or inability to use the software (including but not limited to damages
* for loss of goodwill, work stoppage, computer failure or malfunction, or any and
* all other commercial damages or losses), even if such Contributor has been advised
* of the possibility of such damages.
*/
#include "ScreenCapture.hpp"
namespace Diligent
{
ScreenCapture::ScreenCapture(IRenderDevice* pDevice) :
m_pDevice{pDevice}
{
FenceDesc fenceDesc;
fenceDesc.Name = "Screen capture fence";
m_pDevice->CreateFence(fenceDesc, &m_pFence);
}
void ScreenCapture::Capture(ISwapChain* pSwapChain, IDeviceContext* pContext, Uint32 FrameId)
{
auto* pCurrentRTV = pSwapChain->GetCurrentBackBufferRTV();
auto* pCurrentBackBuffer = pCurrentRTV->GetTexture();
const auto& SCDesc = pSwapChain->GetDesc();
RefCntAutoPtr<ITexture> pStagingTexture;
{
std::lock_guard<std::mutex> Lock{m_AvailableTexturesMtx};
while (!m_AvailableTextures.empty() && !pStagingTexture)
{
pStagingTexture = std::move(m_AvailableTextures.back());
m_AvailableTextures.pop_back();
const auto& TexDesc = pStagingTexture->GetDesc();
if (!(TexDesc.Width == SCDesc.Width &&
TexDesc.Height == SCDesc.Height &&
TexDesc.Format == SCDesc.ColorBufferFormat))
{
pStagingTexture.Release();
}
}
}
if (!pStagingTexture)
{
TextureDesc TexDesc;
TexDesc.Name = "Staging texture for screen capture";
TexDesc.Type = RESOURCE_DIM_TEX_2D;
TexDesc.Width = SCDesc.Width;
TexDesc.Height = SCDesc.Height;
TexDesc.Format = SCDesc.ColorBufferFormat;
TexDesc.Usage = USAGE_STAGING;
TexDesc.CPUAccessFlags = CPU_ACCESS_READ;
m_pDevice->CreateTexture(TexDesc, nullptr, &pStagingTexture);
}
CopyTextureAttribs CopyAttribs(pCurrentBackBuffer, RESOURCE_STATE_TRANSITION_MODE_TRANSITION, pStagingTexture, RESOURCE_STATE_TRANSITION_MODE_TRANSITION);
pContext->CopyTexture(CopyAttribs);
pContext->SignalFence(m_pFence, m_CurrentFenceValue);
{
std::lock_guard<std::mutex> Lock{m_PendingTexturesMtx};
m_PendingTextures.emplace_back(std::move(pStagingTexture), FrameId, m_CurrentFenceValue);
}
++m_CurrentFenceValue;
}
ScreenCapture::CaptureInfo ScreenCapture::GetCapture()
{
CaptureInfo Capture;
std::lock_guard<std::mutex> Lock{m_PendingTexturesMtx};
if (!m_PendingTextures.empty())
{
auto& OldestCapture = m_PendingTextures.front();
auto CompletedFenceValue = m_pFence->GetCompletedValue();
if (OldestCapture.Fence <= CompletedFenceValue)
{
Capture.pTexture = std::move(OldestCapture.pTex);
Capture.Id = OldestCapture.Id;
m_PendingTextures.pop_front();
}
}
return Capture;
}
bool ScreenCapture::HasCapture()
{
std::lock_guard<std::mutex> Lock{m_PendingTexturesMtx};
if (!m_PendingTextures.empty())
{
const auto& OldestCapture = m_PendingTextures.front();
auto CompletedFenceValue = m_pFence->GetCompletedValue();
return OldestCapture.Fence <= CompletedFenceValue;
}
else
{
return false;
}
}
void ScreenCapture::RecycleStagingTexture(RefCntAutoPtr<ITexture>&& pTexture)
{
std::lock_guard<std::mutex> Lock{m_AvailableTexturesMtx};
m_AvailableTextures.emplace_back(std::move(pTexture));
}
} // namespace Diligent
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