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[Fix] (DirectVulkan): round renderbuffer MSAA requests to supported counts

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glRenderbufferStorageMultisample accepts any sample count up to MAX_SAMPLES
(including non-powers-of-two like 3) and promises at-least allocation, but
the renderbuffer path required an exact Vulkan sample-count match and failed
on devices like llvmpipe that expose 1x/4x only. Round the request up to a
power of two and then to the nearest count the device supports for the
format, cached per format so per-draw resolution does not re-query the
physical device.

Un-crashes KHR-GL33.packed_depth_stencil.blit.* (2x/3x MSAA renderbuffers).
This commit is contained in:
BZLZHH
2026-07-31 16:15:50 -04:00
parent 93a3b55907
commit fba26ea169
2 changed files with 54 additions and 21 deletions
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MobileGL/MG_Backend/DirectVulkan/Renderer/VkRenderPassManager.h
+3
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@@ -313,6 +313,9 @@ namespace MobileGL::MG_Backend::DirectVulkan {
UnorderedMap<MG_State::GLState::RenderbufferObject*, RenderbufferResource> m_renderbufferResources;
UnorderedMap<MG_State::GLState::RenderbufferObject*, PendingRenderbufferClear> m_pendingRenderbufferClears;
Vector<DeferredRenderbufferRelease> m_deferredRenderbufferReleases;
// Supported sample counts per attachment format, so per-draw resource lookups
// do not repeat vkGetPhysicalDeviceImageFormatProperties.
UnorderedMap<VkFormat, VkSampleCountFlags> m_attachmentSampleCountsByFormat;
Bool HasPendingRenderbufferClear(
const MG_State::GLState::FramebufferAttachmentObject& attachment) const;