shader: extract 9-bit NGG primitive vertex indices, leaving the edge flags out

2026-10-25 20:36:54 +01:00 · 2026-10-23 13:28:23 +02:00
parent ecc30a1f2d
commit 706aa030ad
2 changed files with 3 additions and 1 deletions
@@ -11160,6 +11160,8 @@ void TestMeshExportStorage() {
              !SpirvSourceHasInstructionUsing(source, "OpAccessChain",
                                              "vsharp %uint_0 %uint_4294967295"),
          "mesh draw prefix was lost or spilled shader data wrapped into push constants");
+    Check(SpirvSourceHasInstructionUsing(source, "OpBitFieldUExtract", "%uint_10 %uint_9"),
+          "NGG primitive vertex indices must be 9 bits; bit 9 of each field is the edge flag");
    const auto &binary = result.spirv;
    for (const auto builtin : {3u, 4u}) {
      auto expected = builtin == 3u ? std::vector<uint32_t>{0, 3}