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Support triangle fans in PS5 geometry shaders

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Keep the fan center across subgroups and reuse the existing index fetch.
This commit is contained in:
nmzik
2026-09-16 08:42:47 +04:00
parent 957452d6f9
commit 7c9148dd47
4 changed files with 47 additions and 16 deletions
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src/graphics/shader/shader.h
+5 -2
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@@ -97,8 +97,11 @@ struct ShaderMeshInputInfo: ShaderWorkgroupInputInfo {
}
}
[[nodiscard]] constexpr uint32_t InputPrimitiveStep() const {
return input_primitive == static_cast<uint32_t>(Prospero::PrimitiveType::kTriStrip)
? 1u : InputPrimitiveSize();
switch (static_cast<Prospero::PrimitiveType>(input_primitive)) {
case Prospero::PrimitiveType::kTriFan:
case Prospero::PrimitiveType::kTriStrip: return 1u;
default: return InputPrimitiveSize();
}
}
[[nodiscard]] constexpr uint32_t InputPrimitiveCount(uint32_t vertices) const {
const auto size = InputPrimitiveSize();