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shader: Implement ImageGradient

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This commit is contained in:
FernandoS27 2021-03-29 02:00:43 +02:00 • committed by ameerj
parent be3e94ae55
commit d5bfc63088
8 changed files with 84 additions and 2 deletions
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51
src/shader_recompiler/backend/spirv/emit_spirv_image.cpp
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@ -69,12 +69,44 @@ public:
}
}
explicit ImageOperands(EmitContext& ctx, bool has_lod_clamp, Id derivates, u32 num_derivates,
Id offset, Id lod_clamp) {
if (Sirit::ValidId(derivates)) {
boost::container::static_vector<Id, 3> deriv_x_accum;
boost::container::static_vector<Id, 3> deriv_y_accum;
for (size_t i = 0; i < num_derivates; i++) {
deriv_x_accum.push_back(ctx.OpCompositeExtract(ctx.F32[1], derivates, i * 2));
deriv_y_accum.push_back(ctx.OpCompositeExtract(ctx.F32[1], derivates, i * 2 + 1));
}
Id derivates_X = ctx.OpCompositeConstruct(
ctx.F32[num_derivates], std::span{deriv_x_accum.data(), deriv_x_accum.size()});
Id derivates_Y = ctx.OpCompositeConstruct(
ctx.F32[num_derivates], std::span{deriv_y_accum.data(), deriv_y_accum.size()});
Add(spv::ImageOperandsMask::Grad, derivates_X, derivates_Y);
} else {
throw LogicError("Derivates must be present");
}
if (Sirit::ValidId(offset)) {
Add(spv::ImageOperandsMask::Offset, offset);
}
if (has_lod_clamp) {
Add(spv::ImageOperandsMask::MinLod, lod_clamp);
}
}
void Add(spv::ImageOperandsMask new_mask, Id value) {
mask = static_cast<spv::ImageOperandsMask>(static_cast<unsigned>(mask) |
static_cast<unsigned>(new_mask));
operands.push_back(value);
}
void Add(spv::ImageOperandsMask new_mask, Id value, Id value_2) {
mask = static_cast<spv::ImageOperandsMask>(static_cast<unsigned>(mask) |
static_cast<unsigned>(new_mask));
operands.push_back(value);
operands.push_back(value_2);
}
std::span<const Id> Span() const noexcept {
return std::span{operands.data(), operands.size()};
}
@ -84,7 +116,7 @@ public:
}
private:
boost::container::static_vector<Id, 3> operands;
boost::container::static_vector<Id, 4> operands;
spv::ImageOperandsMask mask{};
};
@ -165,6 +197,10 @@ Id EmitBindlessImageQueryLod(EmitContext&) {
throw LogicError("Unreachable instruction");
}
Id EmitBindlessImageGradient(EmitContext&) {
throw LogicError("Unreachable instruction");
}
Id EmitBoundImageSampleImplicitLod(EmitContext&) {
throw LogicError("Unreachable instruction");
}
@ -201,6 +237,10 @@ Id EmitBoundImageQueryLod(EmitContext&) {
throw LogicError("Unreachable instruction");
}
Id EmitBoundImageGradient(EmitContext&) {
throw LogicError("Unreachable instruction");
}
Id EmitImageSampleImplicitLod(EmitContext& ctx, IR::Inst* inst, const IR::Value& index, Id coords,
Id bias_lc, Id offset) {
const auto info{inst->Flags<IR::TextureInstInfo>()};
@ -302,4 +342,13 @@ Id EmitImageQueryLod(EmitContext& ctx, IR::Inst*, const IR::Value& index, Id coo
zero, zero);
}
Id EmitImageGradient(EmitContext& ctx, IR::Inst* inst, const IR::Value& index, Id coords,
Id derivates, Id offset, Id lod_clamp) {
const auto info{inst->Flags<IR::TextureInstInfo>()};
const ImageOperands operands(ctx, info.has_lod_clamp != 0, derivates, info.num_derivates, offset, lod_clamp);
return Emit(&EmitContext::OpImageSparseSampleExplicitLod,
&EmitContext::OpImageSampleExplicitLod, ctx, inst, ctx.F32[4], Texture(ctx, index),
coords, operands.Mask(), operands.Span());
}
} // namespace Shader::Backend::SPIRV