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shader: fix filtering for scaled 8-bit textures

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Co-authored-by: Çağatay Güçlü <33038942+defektu@users.noreply.github.com>
This commit is contained in:
nmzik
2026-10-04 20:55:18 +04:00
parent deb45a8bb2
commit 96c067d0fb
4 changed files with 146 additions and 35 deletions
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src/graphics/shader/recompiler/backend/spirv/spirvEmitterImage.cpp
+58 -27
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@@ -391,28 +391,50 @@ Format::BufferFormatInfo ImageConversionFormat(const EmitterState& state,
const auto format = state.program.info.images[mem.resource].conversion_format;
if (format == Prospero::BufferFormat::kInvalid) return {};
const auto info = Format::GetFormatInfo(format);
EXIT_IF(Prospero::SampledTextureNumericClass(format) != Prospero::TextureNumericClass::Uint ||
Prospero::RemapTextureFormat(format) == format ||
info.type != Format::ComponentType::Uint || !info.packed_bitfield ||
info.byte_size != sizeof(uint32_t) || info.component_count == 0u ||
EXIT_IF(Prospero::RemapTextureFormat(format) == format || info.component_count == 0u ||
info.component_count > 4u);
EXIT_IF(info.type != Format::ComponentType::Uscaled &&
(info.type != Format::ComponentType::Uint || !info.packed_bitfield ||
info.byte_size != sizeof(uint32_t)));
return info;
}
uint32_t ImageGatherSource(const EmitterState& state, const IR::MemoryInfo& mem) {
const auto component = ImageGatherComponent(mem.dmask);
const auto info = ImageConversionFormat(state, mem);
if (info.format == Prospero::BufferFormat::kInvalid) return component;
if (info.packed_bitfield) return 0u;
const auto selector =
(state.program.info.images[mem.resource].shader_swizzle >> (component * 3u)) & 7u;
return selector >= 4u ? (selector - 4u) % info.component_count : 0u;
}
uint32_t UnpackImageTexel(ValueEmitContext& ctx, const IR::MemoryInfo& mem, uint32_t texel) {
const auto info = ImageConversionFormat(ctx.state, mem);
if (info.format == Prospero::BufferFormat::kInvalid) return texel;
const auto packed = ctx.state.builder.AllocateId();
ctx.state.builder.AddFunction(spv::OpCompositeExtract, TypeU32(ctx.state), packed, texel, 0u);
uint32_t components[4] = {ConstantU32(ctx.state, 0), ConstantU32(ctx.state, 0),
ConstantU32(ctx.state, 0), ConstantU32(ctx.state, 0)};
const auto numeric_class = ctx.state.program.info.images[mem.resource].numeric_class;
const auto scalar_type = ImageScalarType(ctx.state, numeric_class);
uint32_t packed = 0;
if (info.packed_bitfield) {
packed = ctx.state.builder.AllocateId();
ctx.state.builder.AddFunction(spv::OpCompositeExtract, scalar_type, packed, texel, 0u);
}
uint32_t components[4] {};
for (uint32_t component = 0; component < info.component_count; component++) {
components[component] = ctx.state.builder.AllocateId();
ctx.state.builder.AddFunction(spv::OpBitFieldUExtract, TypeU32(ctx.state),
components[component], packed,
ConstantU32(ctx.state, info.component_bit_offset[component]),
ConstantU32(ctx.state, info.component_bits[component]));
if (info.packed_bitfield) {
ctx.state.builder.AddFunction(spv::OpBitFieldUExtract, scalar_type,
components[component], packed,
ConstantU32(ctx.state, info.component_bit_offset[component]),
ConstantU32(ctx.state, info.component_bits[component]));
} else {
ctx.state.builder.AddFunction(spv::OpCompositeExtract, scalar_type,
components[component], texel, component);
// UNorm backing preserves the guest's filtering; scaling precedes swizzle constants.
components[component] = Binary(ctx.state, spv::OpFMul, scalar_type, components[component],
ConstantF32Value(ctx.state, 255.0f));
}
}
for (uint32_t component = info.component_count; component < 4u; component++) {
components[component] = components[component % info.component_count];
@@ -423,16 +445,19 @@ uint32_t UnpackImageTexel(ValueEmitContext& ctx, const IR::MemoryInfo& mem, uint
for (uint32_t component = 0; component < 4u; component++) {
const auto selector = (swizzle >> (component * 3u)) & 7u;
if (selector == 1u) {
selected[component] = ConstantU32(ctx.state, 1u);
selected[component] = info.packed_bitfield ? ConstantU32(ctx.state, 1u)
: ConstantF32Value(ctx.state, 1.0f);
} else if (selector >= 4u) {
selected[component] = components[selector - 4u];
} else {
selected[component] = ConstantU32(ctx.state, 0u);
selected[component] = info.packed_bitfield ? ConstantU32(ctx.state, 0u)
: ZeroF32(ctx.state);
}
}
const auto result = ctx.state.builder.AllocateId();
ctx.state.builder.AddFunction(spv::OpCompositeConstruct, TypeU32Vector(ctx.state, 4), result,
selected[0], selected[1], selected[2], selected[3]);
ctx.state.builder.AddFunction(spv::OpCompositeConstruct,
ImageVectorType(ctx.state, numeric_class, 4), result, selected[0],
selected[1], selected[2], selected[3]);
return result;
}
@@ -443,10 +468,20 @@ uint32_t UnpackImageGather(ValueEmitContext& ctx, const IR::MemoryInfo& mem, uin
const auto component = ImageGatherComponent(mem.dmask);
const auto selector =
(ctx.state.program.info.images[mem.resource].shader_swizzle >> (component * 3u)) & 7u;
const auto numeric_class = ctx.state.program.info.images[mem.resource].numeric_class;
const auto vector_type = ImageVectorType(ctx.state, numeric_class, 4);
if (selector < 4u) {
const auto value = ConstantU32(ctx.state, selector == 1u ? 1u : 0u);
return ctx.state.builder.Constant(spv::OpConstantComposite, TypeU32Vector(ctx.state, 4),
value, value, value, value);
const auto value = info.packed_bitfield
? ConstantU32(ctx.state, selector == 1u ? 1u : 0u)
: ConstantF32Value(ctx.state, selector == 1u ? 1.0f : 0.0f);
return ctx.state.builder.Constant(spv::OpConstantComposite, vector_type, value, value,
value, value);
}
if (!info.packed_bitfield) {
const auto scale = ConstantF32Value(ctx.state, 255.0f);
const auto scales = ctx.state.builder.Constant(spv::OpConstantComposite, vector_type,
scale, scale, scale, scale);
return Binary(ctx.state, spv::OpFMul, vector_type, gathered, scales);
}
uint32_t values[4] {};
@@ -488,10 +523,7 @@ uint32_t EmitOneDimensionalGatherLz(ValueEmitContext& ctx, const IR::MemoryInfo&
LoadSamplerDescriptor(state, mem.sampler));
const auto vector_type = ImageVectorType(state, numeric_class, 4);
const auto scalar_type = ImageScalarType(state, numeric_class);
const auto component =
ImageConversionFormat(state, mem).format == Prospero::BufferFormat::kInvalid
? ImageGatherComponent(mem.dmask)
: 0u;
const auto component = ImageGatherSource(state, mem);
uint32_t values[2] {};
for (uint32_t index = 0; index < 2u; index++) {
const auto sample_coord =
@@ -515,6 +547,7 @@ uint32_t EmitOneDimensionalGatherLz(ValueEmitContext& ctx, const IR::MemoryInfo&
uint32_t PackImageTexel(ValueEmitContext& ctx, const IR::MemoryInfo& mem, uint32_t texel) {
const auto info = ImageConversionFormat(ctx.state, mem);
if (info.format == Prospero::BufferFormat::kInvalid) return texel;
EXIT_IF(info.type != Format::ComponentType::Uint || !info.packed_bitfield);
auto packed = ConstantU32(ctx.state, 0u);
for (uint32_t component = 0; component < info.component_count; component++) {
@@ -669,7 +702,7 @@ void EmitImage(ValueEmitContext& ctx, const IR::Inst& inst) {
const bool dref = HasFlag(mem, Decoder::ImageSampleFlagCompare);
if (dref && state.program.info.images[mem.resource].conversion_format !=
Prospero::BufferFormat::kInvalid) {
ctx.Fail(inst, "uses depth comparison with a packed integer image");
ctx.Fail(inst, "uses depth comparison with a converted image");
return;
}
if (op == IR::ValueOpcode::ImageGatherRaw) {
@@ -700,9 +733,7 @@ void EmitImage(ValueEmitContext& ctx, const IR::Inst& inst) {
? AddressF32(ctx, mem, *address, layout.dref)
: ZeroF32(state);
} else {
component_or_dref = ConstantU32(
state, ImageConversionFormat(state, mem).format == Prospero::BufferFormat::kInvalid
? ImageGatherComponent(mem.dmask) : 0u);
component_or_dref = ConstantU32(state, ImageGatherSource(state, mem));
}
uint32_t operand_mask = 0;
uint32_t offset = 0;