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[Perf] (Magma): the wire vertex-input layout is kept on its vertex-elements record and buffer handles resolve through a slot-indexed front.

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swung0x48
2026-10-07 14:58:22 -04:00
parent c1497bb83e
commit 032dcd240e
5 changed files with 101 additions and 21 deletions
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MobileGL/MG_Backend/DirectVulkan/Renderer/VertexInputStateFactory.cpp
+58
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@@ -18,6 +18,64 @@
#include <utility>
namespace MobileGL::MG_Backend::DirectVulkan {
namespace {
struct WireVertexInputMemo {
struct Key {
Uint64 Offset;
Uint32 Stride;
Uint32 Divisor;
};
Bool Valid = false;
Uint64 ContentSerial = 0;
Uint32 ActiveMask = 0;
Uint32 Start = 0;
Uint32 Count = 0;
Uint32 KeyCount = 0;
Array<Key, MG_Pipe::kMGPipeMaxVertexAttribs> Keys{};
VertexInputStateFactory::BackendVertexInputState State;
};
} // namespace
const VertexInputStateFactory::BackendVertexInputState* VertexInputStateFactory::ResolveWireVertexInput(
const MG_Pipe::MGPipeVertexElementsRecord& elements, const MG_Pipe::MGPipeApplierState& state,
Uint32 activeMask) const {
auto* memo = static_cast<WireVertexInputMemo*>(elements.BackendMemo.get());
if (memo == nullptr) {
auto created = std::make_shared<WireVertexInputMemo>();
memo = created.get();
elements.BackendMemo = Move(created);
}
// The window first: a location outside it is BuildWireVertexInput's refusal, and the
// keys below index the window.
Bool hit = memo->Valid && memo->ContentSerial == elements.ContentSerial && memo->ActiveMask == activeMask &&
memo->Start == state.VertexBufferStart && memo->Count == state.VertexBufferCount;
if (hit) {
Uint32 n = 0;
for (Uint32 location = 0; location < elements.AttributeCount && hit; ++location) {
if (!elements.Attributes[location].Enabled || !(activeMask & (1u << location))) continue;
const auto& buffer = state.VertexBuffers[location];
const auto& key = memo->Keys[n++];
hit = key.Offset == buffer.Offset && key.Stride == buffer.Stride && key.Divisor == buffer.Divisor;
}
if (hit) return &memo->State;
}
memo->Valid = false;
if (!BuildWireVertexInput(elements, state, activeMask, memo->State)) return nullptr;
Uint32 n = 0;
for (Uint32 location = 0; location < elements.AttributeCount; ++location) {
if (!elements.Attributes[location].Enabled || !(activeMask & (1u << location))) continue;
const auto& buffer = state.VertexBuffers[location];
memo->Keys[n++] = {buffer.Offset, buffer.Stride, buffer.Divisor};
}
memo->KeyCount = n;
memo->ContentSerial = elements.ContentSerial;
memo->ActiveMask = activeMask;
memo->Start = state.VertexBufferStart;
memo->Count = state.VertexBufferCount;
memo->Valid = true;
return &memo->State;
}
Bool VertexInputStateFactory::BuildWireVertexInput(const MG_Pipe::MGPipeVertexElementsRecord& elements,
const MG_Pipe::MGPipeApplierState& state, Uint32 activeMask, BackendVertexInputState& out) const {
// The caller's state is a per-draw scratch (WireDraw.inc): reset it without freeing.