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shader: select indirect texture descriptors for image gathers

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This commit is contained in:
netwarex
2026-10-11 17:55:37 +02:00
committed by nmzik
parent 16a7fe689a
commit 4c87dbebb2
3 changed files with 92 additions and 42 deletions
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src/graphics/shader/recompiler/backend/spirv/spirvEmitterImage.cpp
+35 -27
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@@ -800,15 +800,16 @@ void EmitImage(ValueEmitContext& ctx, const IR::Inst& inst) {
return;
}
if (op == IR::ValueOpcode::ImageGatherRaw) {
const auto coord = CoordF32(ctx, mem, *address, layout.coord,
dimension_info.coordinate_components, image.cube);
if (dimension == ImageDimension::Dim1D) {
if (dref || !HasFlag(mem, Decoder::ImageSampleFlagLevelZero) ||
if (image.indirect_root == mem.resource || dref ||
!HasFlag(mem, Decoder::ImageSampleFlagLevelZero) ||
HasFlag(mem, Decoder::ImageSampleFlagOffset) ||
HasFlag(mem, Decoder::ImageSampleFlagGatherHorizontal)) {
ctx.Fail(inst, "has an unsupported 1D gather variant");
return;
}
const auto coord = CoordF32(ctx, mem, *address, layout.coord,
dimension_info.coordinate_components, image.cube);
const auto sample = EmitOneDimensionalGatherLz(ctx, mem, coord, numeric_class);
ctx.Define(inst, ResultVector(ctx, UnpackImageGather(ctx, mem, sample),
numeric_class, false, mem, true));
@@ -829,32 +830,39 @@ void EmitImage(ValueEmitContext& ctx, const IR::Inst& inst) {
} else {
component_or_dref = ConstantU32(state, ImageGatherSource(state, mem));
}
uint32_t operand_mask = 0;
uint32_t offset = 0;
if (HasFlag(mem, Decoder::ImageSampleFlagGatherHorizontal)) {
operand_mask = spv::ImageOperandsConstOffsetsMask;
offset = HorizontalOffsets(state, dimension);
} else if (layout.offset != NoImageComponent) {
operand_mask = spv::ImageOperandsOffsetMask;
offset = PackedOffset(ctx, mem, *address, layout, dimension);
}
const auto sampler_id = LoadSamplerDescriptor(state, mem.sampler);
const auto EmitGather = [&](uint32_t mip) {
const auto sampled = MakeSampledImage(state, mem.resource, sampler_id, mip);
const auto sample = state.builder.AllocateId();
const std::array operands {operand_mask, offset};
state.builder.AddFunction(
dref ? spv::OpImageDrefGather : spv::OpImageGather, result_type,
sample, sampled, coord, component_or_dref,
std::span(operands).first(operand_mask != 0u ? 2u : 0u));
return sample;
const auto EmitGather = [&](uint32_t resource, uint32_t array_index) {
const auto& candidate = state.program.info.images[resource];
const auto dimension = candidate.dimension;
const auto coord = CoordF32(
ctx, mem, *address, layout.coord,
ImageDimensionInfoFor(dimension).coordinate_components, candidate.cube);
uint32_t operand_mask = 0;
uint32_t offset = 0;
if (HasFlag(mem, Decoder::ImageSampleFlagGatherHorizontal)) {
operand_mask = spv::ImageOperandsConstOffsetsMask;
offset = HorizontalOffsets(state, dimension);
} else if (layout.offset != NoImageComponent) {
operand_mask = spv::ImageOperandsOffsetMask;
offset = PackedOffset(ctx, mem, *address, layout, dimension);
}
const auto EmitMip = [&](uint32_t mip) {
const auto sampled = MakeSampledImage(state, resource, sampler_id, mip, array_index);
const auto sample = state.builder.AllocateId();
const std::array operands {operand_mask, offset};
state.builder.AddFunction(
dref ? spv::OpImageDrefGather : spv::OpImageGather, result_type,
sample, sampled, coord, component_or_dref,
std::span(operands).first(operand_mask != 0u ? 2u : 0u));
return sample;
};
return candidate.mip_mode == IR::ImageMipMode::Dynamic && candidate.mip_count > 1u
? EmitIndexSwitch(
state, GatherMip(ctx, inst, mem, *address, layout, candidate.mip_count),
candidate.mip_count, result_type, EmitMip)
: EmitMip(0u);
};
const auto sample = image.mip_mode == IR::ImageMipMode::Dynamic && image.mip_count > 1u
? EmitIndexSwitch(
state, GatherMip(ctx, inst, mem, *address, layout,
image.mip_count),
image.mip_count, result_type, EmitGather)
: EmitGather(0);
const auto sample = EmitImageAccess(ctx, inst, result_type, EmitGather);
ctx.Define(inst, ResultVector(ctx, UnpackImageGather(ctx, mem, sample),
result_numeric_class, false, mem, true));
return;