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GPUDevice: Make vsync actually tear-free

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Apparently users prefer stutter over tearing...
This commit is contained in:
Stenzek
2024-05-23 13:52:24 +10:00
parent dd98b630ea
commit 6cad97b404
17 changed files with 178 additions and 87 deletions
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45
src/util/d3d12_device.cpp
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@ -797,6 +797,13 @@ bool D3D12Device::HasSurface() const
return static_cast<bool>(m_swap_chain);
}
u32 D3D12Device::GetSwapChainBufferCount() const
{
// With vsync off, we only need two buffers. Same for blocking vsync.
// With triple buffering, we need three.
return (m_vsync_enabled && m_vsync_prefer_triple_buffer) ? 3 : 2;
}
bool D3D12Device::CreateSwapChain()
{
if (m_window_info.type != WindowInfo::Type::Win32)
@ -830,7 +837,7 @@ bool D3D12Device::CreateSwapChain()
swap_chain_desc.Height = static_cast<u32>(client_rc.bottom - client_rc.top);
swap_chain_desc.Format = fm.resource_format;
swap_chain_desc.SampleDesc.Count = 1;
swap_chain_desc.BufferCount = 3;
swap_chain_desc.BufferCount = GetSwapChainBufferCount();
swap_chain_desc.BufferUsage = DXGI_USAGE_RENDER_TARGET_OUTPUT;
swap_chain_desc.SwapEffect = DXGI_SWAP_EFFECT_FLIP_DISCARD;
@ -1081,6 +1088,42 @@ std::string D3D12Device::GetDriverInfo() const
return ret;
}
std::optional<float> D3D12Device::GetHostRefreshRate()
{
if (m_swap_chain && m_is_exclusive_fullscreen)
{
DXGI_SWAP_CHAIN_DESC desc;
if (SUCCEEDED(m_swap_chain->GetDesc(&desc)) && desc.BufferDesc.RefreshRate.Numerator > 0 &&
desc.BufferDesc.RefreshRate.Denominator > 0)
{
Log_DevFmt("using fs rr: {} {}", desc.BufferDesc.RefreshRate.Numerator, desc.BufferDesc.RefreshRate.Denominator);
return static_cast<float>(desc.BufferDesc.RefreshRate.Numerator) /
static_cast<float>(desc.BufferDesc.RefreshRate.Denominator);
}
}
return GPUDevice::GetHostRefreshRate();
}
void D3D12Device::SetVSyncEnabled(bool enabled, bool prefer_triple_buffer)
{
if (m_vsync_enabled == enabled && m_vsync_prefer_triple_buffer == prefer_triple_buffer)
return;
const u32 old_buffer_count = GetSwapChainBufferCount();
m_vsync_enabled = enabled;
m_vsync_prefer_triple_buffer = prefer_triple_buffer;
if (!m_swap_chain)
return;
if (GetSwapChainBufferCount() != old_buffer_count)
{
DestroySwapChain();
if (!CreateSwapChain())
Panic("Failed to recreate swap chain after vsync change.");
}
}
bool D3D12Device::BeginPresent(bool frame_skip)
{
if (InRenderPass())