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shader: read sample IDs from pixel ancillary input

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This commit is contained in:
nmzik
2026-09-06 06:54:38 +04:00
parent ace877ce28
commit b346f58b73
8 changed files with 91 additions and 20 deletions
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tests/shaderCfgTests.cpp
+15 -1
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@@ -6011,8 +6011,22 @@ void TestPixelAncillaryLayerInput() {
unused_result.spirv[1] == 0x00010300u &&
!SpirvContainsCapability(unused_result.spirv, 69u),
"unused ancillary input changed the module requirements");
#if KYTY_PLATFORM != KYTY_PLATFORM_WINDOWS
shader[1] = EncodeVop3Word1(5 + 256, 128 + 8, 128 + 4);
auto sample_result = RecompileForTest(shader, options);
Check(ProgramHasInput(sample_result.program, StageInputKind::SampleId) &&
ProgramHasInput(sample_result.program, StageInputKind::Layer) &&
!ProgramHasInput(sample_result.program, StageInputKind::PackedAncillary),
"sample index extraction discarded another live ancillary field");
Check(SpirvHasDecorationValueWithDecoration(sample_result.spirv, 11u, 18u, 14u) &&
SpirvContainsCapability(sample_result.spirv, 35u),
"sample index lacks its flat builtin or sample-rate capability");
const auto sample_source = DisassembleSpirvBinary(sample_result.spirv);
Check(SpirvSourceHasInstructionUsing(sample_source, "OpLoad", "%int %gl_SampleID"),
"sample index was not loaded from its scalar integer input");
CheckSpirvBinaryValidates(sample_result.spirv);
#if KYTY_PLATFORM != KYTY_PLATFORM_WINDOWS
shader[1] = EncodeVop3Word1(5 + 256, 128 + 12, 128 + 4);
ExpectFatal([&] { (void)RecompileForTest(shader, options); },
"unsupported live ancillary field was silently replaced");
#endif