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[Perf] (MG_Backend/DirectVulkan): zero-copy UBO bind - point descriptor at the app's persistent VkBuffer instead of a per-draw transient copy; fps 127->166

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swung0x48
2026-07-12 10:11:49 -04:00
parent 375f2df694
commit acaa9f6dc7
2 changed files with 61 additions and 19 deletions
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MobileGL/MG_Backend/DirectVulkan/Renderer/UniformManager.h
+11 -1
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@@ -89,9 +89,19 @@ namespace MobileGL::MG_Backend::DirectVulkan {
const MG_State::GLState::ProgramObject& program,
const ProgramFactory::VkProgramObject& programObj, Uint32 binding,
VkDescriptorImageInfo& outImageInfo) const;
// Result of resolving a UBO binding: either a zero-copy direct bind to the app's resident
// VkBuffer (the GLES backend's approach - no per-draw copy) or the CPU payload to upload.
struct UboBindResult {
Bool directBindable = false;
VkBuffer buffer = VK_NULL_HANDLE;
VkDeviceSize range = 0; // reflected block size; constant across draws (hashed)
VkDeviceSize dynamicOffset = 0; // block range start; moves per draw (NOT hashed)
const void* payload = nullptr; // fallback UploadTransient path
VkDeviceSize payloadSize = 0;
};
Bool ResolveUniformBufferPayload(const MG_State::GLState::ProgramObject& program,
const ProgramFactory::VkProgramObject& programObj, Uint32 binding,
const void*& outData, VkDeviceSize& outSize) const;
UboBindResult& out) const;
Bool CreateDescriptorPool(Uint32 maxSets, VkDescriptorPool& outPool) const;
Bool GrowFrameDescriptorPool(FrameResources& frame, Uint32 frameIndex);
VkResult AllocateDescriptorSetsFromActivePool(