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c/main: pick composite alpha from surface caps in swapchain creation

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Part-of: <https://gitlab.freedesktop.org/monado/monado/-/merge_requests/2332>
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Simon Zeni 2024-10-17 11:01:27 -04:00 committed by Rylie Pavlik
parent a944cfdcf4
commit c6c7a0047c
1 changed files with 15 additions and 1 deletions
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16
src/xrt/compositor/main/comp_target_swapchain.c
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@ -731,6 +731,20 @@ comp_target_swapchain_create_images(struct comp_target *ct, const struct comp_ta
// Get the image count.
uint32_t image_count = select_image_count(cts, surface_caps, preferred_at_least_image_count);
/*
* VUID-VkSwapchainCreateInfoKHR-compositeAlpha-01280
* compositeAlpha must be one of the bits present in the supportedCompositeAlpha member of the
* VkSurfaceCapabilitiesKHR structure returned by vkGetPhysicalDeviceSurfaceCapabilitiesKHR for the surface.
*/
VkCompositeAlphaFlagsKHR composite_alpha = 0;
if (surface_caps.supportedCompositeAlpha & VK_COMPOSITE_ALPHA_OPAQUE_BIT_KHR) {
composite_alpha = VK_COMPOSITE_ALPHA_OPAQUE_BIT_KHR;
} else if (surface_caps.supportedCompositeAlpha & VK_COMPOSITE_ALPHA_INHERIT_BIT_KHR) {
composite_alpha = VK_COMPOSITE_ALPHA_INHERIT_BIT_KHR;
} else {
COMP_ERROR(ct->c, "Unsupported composite alpha");
goto error_print_and_free;
}
/*
* Do the creation.
@ -753,7 +767,7 @@ comp_target_swapchain_create_images(struct comp_target *ct, const struct comp_ta
.imageSharingMode = VK_SHARING_MODE_EXCLUSIVE,
.queueFamilyIndexCount = 0,
.preTransform = surface_caps.currentTransform,
.compositeAlpha = VK_COMPOSITE_ALPHA_OPAQUE_BIT_KHR,
.compositeAlpha = composite_alpha,
.presentMode = cts->present_mode,
.clipped = VK_TRUE,
.oldSwapchain = old_swapchain_handle,