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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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54
src/shader_recompiler/backend/spirv/emit_context.cpp
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@ -135,6 +135,45 @@ Id DefineOutput(EmitContext& ctx, Id type, std::optional<spv::BuiltIn> builtin =
return DefineVariable(ctx, type, builtin, spv::StorageClass::Output);
}
void DefineGenericOutput(EmitContext& ctx, size_t index) {
static constexpr std::string_view swizzle{"xyzw"};
const size_t base_attr_index{static_cast<size_t>(IR::Attribute::Generic0X) + index * 4};
u32 element{0};
while (element < 4) {
const u32 remainder{4 - element};
const TransformFeedbackVarying* xfb_varying{};
if (!ctx.profile.xfb_varyings.empty()) {
xfb_varying = &ctx.profile.xfb_varyings[base_attr_index + element];
xfb_varying = xfb_varying && xfb_varying->components > 0 ? xfb_varying : nullptr;
}
const u32 num_components{xfb_varying ? xfb_varying->components : remainder};
const Id id{DefineOutput(ctx, ctx.F32[num_components])};
ctx.Decorate(id, spv::Decoration::Location, static_cast<u32>(index));
if (element > 0) {
ctx.Decorate(id, spv::Decoration::Component, element);
}
if (xfb_varying) {
ctx.Decorate(id, spv::Decoration::XfbBuffer, xfb_varying->buffer);
ctx.Decorate(id, spv::Decoration::XfbStride, xfb_varying->stride);
ctx.Decorate(id, spv::Decoration::Offset, xfb_varying->offset);
}
if (num_components < 4 || element > 0) {
ctx.Name(id, fmt::format("out_attr{}", index));
} else {
const std::string_view subswizzle{swizzle.substr(element, num_components)};
ctx.Name(id, fmt::format("out_attr{}_{}", index, subswizzle));
}
const GenericElementInfo info{
.id = id,
.first_element = element,
.num_components = num_components,
};
std::fill_n(ctx.output_generics[index].begin(), num_components, info);
element += num_components;
}
}
Id GetAttributeType(EmitContext& ctx, AttributeType type) {
switch (type) {
case AttributeType::Float:
@ -663,12 +702,15 @@ void EmitContext::DefineAttributeMemAccess(const Info& info) {
OpReturn();
++label_index;
}
for (size_t i = 0; i < info.stores_generics.size(); i++) {
for (size_t i = 0; i < info.stores_generics.size(); ++i) {
if (!info.stores_generics[i]) {
continue;
}
if (output_generics[i][0].num_components != 4) {
throw NotImplementedException("Physical stores and transform feedbacks");
}
AddLabel(labels[label_index]);
const Id generic_id{output_generics.at(i)};
const Id generic_id{output_generics[i][0].id};
const Id pointer{OpAccessChain(output_f32, generic_id, masked_index)};
OpStore(pointer, store_value);
OpReturn();
@ -1015,11 +1057,9 @@ void EmitContext::DefineOutputs(const Info& info) {
}
viewport_index = DefineOutput(*this, U32[1], spv::BuiltIn::ViewportIndex);
}
for (size_t i = 0; i < info.stores_generics.size(); ++i) {
if (info.stores_generics[i]) {
output_generics[i] = DefineOutput(*this, F32[4]);
Decorate(output_generics[i], spv::Decoration::Location, static_cast<u32>(i));
Name(output_generics[i], fmt::format("out_attr{}", i));
for (size_t index = 0; index < info.stores_generics.size(); ++index) {
if (info.stores_generics[index]) {
DefineGenericOutput(*this, index);
}
}
if (stage == Stage::Fragment) {