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shader: Implement transform feedbacks and define file format

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This commit is contained in:
ReinUsesLisp 2021-04-14 01:04:59 -03:00 • committed by ameerj
parent a83579b50a
commit b126987c59
11 changed files with 272 additions and 23 deletions
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29
src/shader_recompiler/backend/spirv/emit_spirv_special.cpp
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@ -22,6 +22,21 @@ void SetFixedPipelinePointSize(EmitContext& ctx) {
ctx.OpStore(ctx.output_point_size, ctx.Constant(ctx.F32[1], point_size));
}
}
Id DefaultVarying(EmitContext& ctx, u32 num_components, u32 element, Id zero, Id one,
Id default_vector) {
switch (num_components) {
case 1:
return element == 3 ? one : zero;
case 2:
return ctx.ConstantComposite(ctx.F32[2], zero, element + 1 == 3 ? one : zero);
case 3:
return ctx.ConstantComposite(ctx.F32[3], zero, zero, element + 2 == 3 ? one : zero);
case 4:
return default_vector;
}
throw InvalidArgument("Bad element");
}
} // Anonymous namespace
void EmitPrologue(EmitContext& ctx) {
@ -30,9 +45,17 @@ void EmitPrologue(EmitContext& ctx) {
const Id one{ctx.Constant(ctx.F32[1], 1.0f)};
const Id default_vector{ctx.ConstantComposite(ctx.F32[4], zero, zero, zero, one)};
ctx.OpStore(ctx.output_position, default_vector);
for (const Id generic_id : ctx.output_generics) {
if (Sirit::ValidId(generic_id)) {
ctx.OpStore(generic_id, default_vector);
for (const auto& info : ctx.output_generics) {
if (info[0].num_components == 0) {
continue;
}
u32 element{0};
while (element < 4) {
const auto& element_info{info[element]};
const u32 num{element_info.num_components};
const Id value{DefaultVarying(ctx, num, element, zero, one, default_vector)};
ctx.OpStore(element_info.id, value);
element += num;
}
}
}