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Fix QVulkanWindow on Wayland 

The Wayland backend needs 4 buffers and is failing when
making QVulkanWindow since there was a hardcoded limit at
3.

The Vulkan-backend to RHI already has smarter handling of
this. We want to limit the changes we do to the "legacy"
QVulkanWindow, so we keep the hardcoded max value but
increase it to 4 to accommodate the requirements on
Wayland.

Task-number: QTBUG-91418
Change-Id: I830bc30d1c2eeac1b076c50d35d5d138fd46dace
Reviewed-by: Laszlo Agocs <laszlo.agocs@qt.io>
bb10
Eskil Abrahamsen Blomfeldt 2021-03-01 09:59:33 +01:00
parent f226854d25
commit be14adfdc8
1 changed files with 1 additions and 1 deletions
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2
src/gui/vulkan/qvulkanwindow_p.h
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@ -126,7 +126,7 @@ public:
PFN_vkGetPhysicalDeviceSurfaceCapabilitiesKHR vkGetPhysicalDeviceSurfaceCapabilitiesKHR = nullptr;
PFN_vkGetPhysicalDeviceSurfaceFormatsKHR vkGetPhysicalDeviceSurfaceFormatsKHR;
static const int MAX_SWAPCHAIN_BUFFER_COUNT = 3;
static const int MAX_SWAPCHAIN_BUFFER_COUNT = 4;
static const int MAX_FRAME_LAG = QVulkanWindow::MAX_CONCURRENT_FRAME_COUNT;
// QVulkanWindow only supports the always available FIFO mode. The
// rendering thread will get throttled to the presentation rate (vsync).