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graphics: render packed 11-11-10 UNorm targets with exact rounding

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Co-authored-by: fxpw <fxpw@outlook.com>
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nmzikandfxpw committed 2026-10-15 22:28:01 +02:00
1 parent fb213e8ae5
commit b4406b0467
11 files changed
+291 -10
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tests/shaderCfgTests.cpp
+45
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@@ -13526,6 +13526,12 @@ void TestRenderTargetReverseExportMapping() {
2,
{Prospero::ColorMappingRgba, Prospero::ColorMappingRgab,
Prospero::ColorMappingBgra, Prospero::ColorMappingAgbr}},
{Prospero::ChannelLayout::k11_11_10,
Prospero::ChannelType::kUNorm,
vk::Format::eR32Uint,
4,
{Prospero::ColorMappingRgba, Prospero::ColorMappingRgab,
Prospero::ColorMappingBgra, Prospero::ColorMappingAgbr}},
{Prospero::ChannelLayout::k16_16_16_16,
Prospero::ChannelType::kFloat,
vk::Format::eR16G16B16A16Sfloat,
@@ -13664,6 +13670,45 @@ void TestRenderTargetReverseExportMapping() {
PrepareProgram(regs, sh, mappings, compiled_info);
Check(sparse_slot_key == MakeStageStaticKey(compiled_info),
"component-only shader mask changes introduced a duplicate shader variant");
ShaderPixelInputInfo packed_info{};
packed_info.target_output_mode[0] = 9;
const auto unconverted_key = MakeStageStaticKey(packed_info);
packed_info.target_packed_unorm_mask = 1;
const auto half_up_key = MakeStageStaticKey(packed_info);
options.input_info.pixel = &packed_info;
const auto packed = RecompileForTest(shader, options);
const auto packed_source = DisassembleSpirvBinary(packed.spirv);
Check(half_up_key != unconverted_key &&
packed_source.find("OpVariable %_ptr_Output_v4uint Output") != std::string::npos &&
packed_source.find("RoundEven") == std::string::npos &&
packed_source.find("UnpackHalf2x16") == std::string::npos,
"mode9 packed MRT export lost its cache identity, integer backing or FP32 interpretation");
CheckSpirvBinaryValidates(packed.spirv);
packed_info.target_round_mode = 1;
const auto truncate = RecompileForTest(shader, options);
Check(MakeStageStaticKey(packed_info) != half_up_key && truncate.spirv != packed.spirv,
"packed MRT rounding was omitted from shader specialization");
CheckSpirvBinaryValidates(truncate.spirv);
packed_info.target_round_mode = 0;
Check(MakeStageStaticKey(packed_info) == half_up_key,
"restoring packed MRT rounding did not restore the static key");
packed_info.target_export_mapping[0] = Prospero::ColorMappingBgra;
const auto packed_reversed = RecompileForTest(shader, options);
Check(MakeStageStaticKey(packed_info) != half_up_key &&
SpirvContainsVectorShuffle(packed_reversed.spirv, {2u, 1u, 0u, 3u}),
"packed MRT conversion bypassed logical component ordering");
CheckSpirvBinaryValidates(packed_reversed.spirv);
#if KYTY_PLATFORM != KYTY_PLATFORM_WINDOWS
const uint32_t partial_packed[] = {
EncodeExp0(0, 0x3), EncodeExp1(0, 1, 2, 3), 0xbf810000u};
ExpectFatal([&] { (void)RecompileForTest(partial_packed, options); },
"partial packed MRT export was accepted without preserving untouched fields");
const uint32_t compressed_packed[] = {
EncodeExp0(0, 0xf, true, true), EncodeExp1(0, 1, 0, 0), 0xbf810000u};
ExpectFatal([&] { (void)RecompileForTest(compressed_packed, options); },
"packed MRT accepted an unsupported compressed export");
#endif
}
void TestBlendMappingClassification() {