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vulkan: Don't set the opaque bit on transparent windows

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If window transparency was requested via the SDL_WINDOW_TRANSPARENT flag, don't set the opaque bit on the swapchain composite alpha value. Fixes transparent windows when using the Vulkan renderer (e.g. testsprite --transparent).
This commit is contained in:
Frank Praznik 2024-06-28 13:53:37 -04:00
parent 339d83bdfa
commit 44ec57626f
1 changed files with 1 additions and 1 deletions
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2
src/render/vulkan/SDL_render_vulkan.c
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@ -2150,7 +2150,7 @@ static VkResult VULKAN_CreateSwapChain(SDL_Renderer *renderer, int w, int h)
swapchainCreateInfo.imageUsage = VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT | VK_IMAGE_USAGE_TRANSFER_DST_BIT;
swapchainCreateInfo.imageSharingMode = VK_SHARING_MODE_EXCLUSIVE;
swapchainCreateInfo.preTransform = rendererData->surfaceCapabilities.currentTransform;
swapchainCreateInfo.compositeAlpha = VK_COMPOSITE_ALPHA_OPAQUE_BIT_KHR;
swapchainCreateInfo.compositeAlpha = (renderer->window->flags & SDL_WINDOW_TRANSPARENT) ? 0 : VK_COMPOSITE_ALPHA_OPAQUE_BIT_KHR;
swapchainCreateInfo.presentMode = presentMode;
swapchainCreateInfo.clipped = VK_TRUE;
swapchainCreateInfo.oldSwapchain = rendererData->swapchain;