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GPU: Clarify VK_KHR_maintenance9 comment

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cosmonaut
2026-05-07 09:58:56 -07:00
parent 2949a0d6d5
commit c8feb29746
1 changed files with 4 additions and 2 deletions
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6
src/gpu/vulkan/SDL_gpu_vulkan.c
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@@ -2744,8 +2744,10 @@ static void VULKAN_INTERNAL_TextureSubresourceMemoryBarrier(
memoryBarrier.subresourceRange.baseArrayLayer = textureSubresource->layer;
memoryBarrier.subresourceRange.layerCount = 1;
// VK_KHR_maintenance9 adds the ability to independently transition arbitrary subsets of slices in a 3D texture,
// we need to extend the barrier layer count in order to preserve intended behaviour when that extension is enabled.
// VK_KHR_maintenance9 adds the ability to independently transition arbitrary subsets of slices in a 3D texture
// but otherwise it is not necessarily supported by the driver.
// As a workaround we have to transition the whole texture instead of just the subresource.
// If VK_KHR_maintenance9 becomes widely supported, this can be removed.
// See https://docs.vulkan.org/features/latest/features/proposals/VK_KHR_maintenance9.html#_barriers_with_2d_array_compatible_3d_images
if (textureSubresource->parent->container->header.info.type == SDL_GPU_TEXTURETYPE_3D) {
memoryBarrier.subresourceRange.layerCount = VK_REMAINING_ARRAY_LAYERS;