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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) {

8
src/shader_recompiler/backend/spirv/emit_context.h
View File

@@ -79,6 +79,12 @@ struct StorageDefinitions {
Id U32x4{};
};
struct GenericElementInfo {
Id id{};
u32 first_element{};
u32 num_components{};
};
class EmitContext final : public Sirit::Module {
public:
explicit EmitContext(const Profile& profile, IR::Program& program, u32& binding);
@@ -189,7 +195,7 @@ public:
Id output_point_size{};
Id output_position{};
std::array<Id, 32> output_generics{};
std::array<std::array<GenericElementInfo, 4>, 32> output_generics{};
std::array<Id, 8> frag_color{};
Id frag_depth{};

3
src/shader_recompiler/backend/spirv/emit_spirv.cpp
View File

@@ -288,6 +288,9 @@ void SetupCapabilities(const Profile& profile, const Info& info, EmitContext& ct
if (info.uses_typeless_image_writes) {
ctx.AddCapability(spv::Capability::StorageImageWriteWithoutFormat);
}
if (!ctx.profile.xfb_varyings.empty()) {
ctx.AddCapability(spv::Capability::TransformFeedback);
}
// TODO: Track this usage
ctx.AddCapability(spv::Capability::ImageGatherExtended);
ctx.AddCapability(spv::Capability::ImageQuery);

19
src/shader_recompiler/backend/spirv/emit_spirv_context_get_set.cpp
View File

@@ -40,11 +40,17 @@ Id AttrPointer(EmitContext& ctx, Id pointer_type, Id vertex, Id base, Args&&...
}
std::optional<Id> OutputAttrPointer(EmitContext& ctx, IR::Attribute attr) {
const u32 element{static_cast<u32>(attr) % 4};
const auto element_id{[&] { return ctx.Constant(ctx.U32[1], element); }};
if (IR::IsGeneric(attr)) {
const u32 index{IR::GenericAttributeIndex(attr)};
return ctx.OpAccessChain(ctx.output_f32, ctx.output_generics.at(index), element_id());
const u32 element{IR::GenericAttributeElement(attr)};
const GenericElementInfo& info{ctx.output_generics.at(index).at(element)};
if (info.num_components == 1) {
return info.id;
} else {
const u32 index_element{element - info.first_element};
const Id index_id{ctx.Constant(ctx.U32[1], index_element)};
return ctx.OpAccessChain(ctx.output_f32, info.id, index_id);
}
}
switch (attr) {
case IR::Attribute::PointSize:
@@ -52,8 +58,11 @@ std::optional<Id> OutputAttrPointer(EmitContext& ctx, IR::Attribute attr) {
case IR::Attribute::PositionX:
case IR::Attribute::PositionY:
case IR::Attribute::PositionZ:
case IR::Attribute::PositionW:
return ctx.OpAccessChain(ctx.output_f32, ctx.output_position, element_id());
case IR::Attribute::PositionW: {
const u32 element{static_cast<u32>(attr) % 4};
const Id element_id{ctx.Constant(ctx.U32[1], element)};
return ctx.OpAccessChain(ctx.output_f32, ctx.output_position, element_id);
}
case IR::Attribute::ClipDistance0:
case IR::Attribute::ClipDistance1:
case IR::Attribute::ClipDistance2:

29
src/shader_recompiler/backend/spirv/emit_spirv_special.cpp
View File

@@ -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;
}
}
}