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Vulkan: Don't use FIFO_RELAXED present mode for vsync.

This commit is contained in:
Stenzek 2016-11-07 19:22:27 +10:00
parent 136a10482f
commit c09ce029df
1 changed files with 6 additions and 18 deletions
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24
Source/Core/VideoBackends/Vulkan/SwapChain.cpp
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@ -198,25 +198,13 @@ bool SwapChain::SelectPresentMode()
return it != present_modes.end();
};
// If vsync is enabled, prefer VK_PRESENT_MODE_FIFO_KHR.
if (m_vsync_enabled)
// If vsync is enabled, use VK_PRESENT_MODE_FIFO_KHR.
// This check should not fail with conforming drivers, as the FIFO present mode is mandated by
// the specification (VK_KHR_swapchain). In case it isn't though, fall through to any other mode.
if (m_vsync_enabled && CheckForMode(VK_PRESENT_MODE_FIFO_KHR))
{
// Try for relaxed vsync first, since it's likely the VI won't line up with
// the refresh rate of the system exactly, so tearing once is better than
// waiting for the next vblank.
if (CheckForMode(VK_PRESENT_MODE_FIFO_RELAXED_KHR))
{
m_present_mode = VK_PRESENT_MODE_FIFO_RELAXED_KHR;
return true;
}
// Fall back to strict vsync.
if (CheckForMode(VK_PRESENT_MODE_FIFO_KHR))
{
WARN_LOG(VIDEO, "Vulkan: FIFO_RELAXED not available, falling back to FIFO.");
m_present_mode = VK_PRESENT_MODE_FIFO_KHR;
return true;
}
m_present_mode = VK_PRESENT_MODE_FIFO_KHR;
return true;
}
// Prefer screen-tearing, if possible, for lowest latency.