layer: Force bypass when requested format is unsupported on fallback#2183
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matte-schwartz wants to merge 1 commit into
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layer: Force bypass when requested format is unsupported on fallback#2183matte-schwartz wants to merge 1 commit into
matte-schwartz wants to merge 1 commit into
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When canBypassXWayland returns false at swapchain creation and the requested format isn't on the fallback surface, refusing the swapchain leaves the app with no recovery path. Instead, prefer bypass over INITIALIZATION_FAILED. Star Citizen reproduces this during the game's launch process: it recreates its swapchain exactly when its X11 toplevel and inner window are mid-resize, so canBypass returns false (geometry mismatch) and the create lands on the XCB fallback surface. The XCB fallback only advertises B8G8R8A8 family formats, which means the recreate is refused for any other format. Without HDR exposed SC asks for VK_FORMAT_R8G8B8A8_UNORM, and with HDR exposed it instead tries to use VK_FORMAT_R16G16B16A16_SFLOAT. Either way, the game stalls on an infinite black screen after gamescope refuses the swapchain recreate. Track the bypass override on the swapchain so QueuePresentKHR doesn't ask the app to recreate when the live canBypass disagrees.
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When canBypassXWayland returns false at swapchain creation and the requested format isn't on the fallback surface, refusing the swapchain leaves the app with no recovery path. Instead, prefer bypass over INITIALIZATION_FAILED.
Star Citizen reproduces this during the game's launch process: it recreates its swapchain exactly when its X11 toplevel and inner window are mid-resize, so canBypass returns false (geometry mismatch) and the create lands on the XCB fallback surface. The XCB fallback only advertises B8G8R8A8 family formats, which means the recreate is refused for any other format. Without HDR exposed SC asks for VK_FORMAT_R8G8B8A8_UNORM, and with HDR exposed it instead tries to use VK_FORMAT_R16G16B16A16_SFLOAT. Either way, the game stalls on an infinite black screen after gamescope refuses the swapchain recreate.
Track the bypass override on the swapchain so QueuePresentKHR doesn't ask the app to recreate when the live canBypass disagrees.