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[Fix] (MG_Util, MG_Backend/DirectVulkan): GL reads gl_BaseVertex as zero on a non-indexed draw where Vulkan's builtin hands over firstVertex

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swung0x48
2026-08-12 04:18:07 -04:00
parent 7625cf450d
commit 7311251f30
9 changed files with 318 additions and 2 deletions
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MobileGL/MG_Util/ShaderTranspiler/ShaderCompiler.cpp
+10
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@@ -21,6 +21,7 @@
#include "SpirvPasses/LowerDrawParametersPass.h"
#include "SpirvPasses/PackDoubleVertexInputsPass.h"
#include "SpirvPasses/RebaseInstanceIndexPass.h"
#include "SpirvPasses/ZeroBaseVertexPass.h"
#include "SpirvPasses/NormalizeRectCoordinatesPass.h"
#include "SpirvPasses/PrivateToEntryLocalPass.h"
#include "SpirvPasses/StripUniformLocationsPass.h"
@@ -758,6 +759,15 @@ namespace MobileGL {
outputBinary);
}
bool ShaderCompiler::ZeroBaseVertexForVulkan(const Vector<Uint32>& inputBinary,
Vector<uint32_t>& outputBinary) {
using namespace spvtools;
Optimizer optimizer(SPV_ENV_VULKAN_1_1);
optimizer.RegisterPass(ZeroBaseVertexPass::CreateZeroBaseVertexPass());
return RunOptimizerChecked("ZeroBaseVertexForVulkan", optimizer, inputBinary, outputBinary);
}
bool ShaderCompiler::DecoratePositionInvariantForVulkan(const Vector<Uint32>& inputBinary,
Vector<uint32_t>& outputBinary) {
using namespace spvtools;