Hi all,
I noticed on an intel laptop that the only supported alpha mode for
any display plane is opaque. Is there a specific reason for this? I'm
trying to draw interfaces and things direct to the display and it
would be really nice to have alpha blending.
>From src/vulkan/wsi/wsi_common_display.c:
721 VkResult
722 wsi_get_display_plane_capabilities(VkPhysicalDevice physical_device,
723 struct wsi_device *wsi_device,
724 VkDisplayModeKHR mode_khr,
725 uint32_t plane_index,
726 VkDisplayPlaneCapabilitiesKHR
*capabilities)
727 {
728 struct wsi_display_mode *mode = wsi_display_mode_from_handle(mode_khr);
729
730 /* XXX use actual values */
731 capabilities->supportedAlpha = VK_DISPLAY_PLANE_ALPHA_OPAQUE_BIT_KHR;
I'm just curious if there is a technical reason why blending isn't
allowed, as the vulkan spec seems to permit it.
Thanks!
Austin Shafer
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