// Copyright 2021 yuzu Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <algorithm>
#include <array>
#include <string_view>
#include <fmt/format.h>
#include "common/common_types.h"
#include "common/div_ceil.h"
#include "shader_recompiler/backend/spirv/emit_context.h"
namespace Shader::Backend::SPIRV {
namespace {
Id ImageType(EmitContext& ctx, const TextureDescriptor& desc) {
const spv::ImageFormat format{spv::ImageFormat::Unknown};
const Id type{ctx.F32[1]};
switch (desc.type) {
case TextureType::Color1D:
return ctx.TypeImage(type, spv::Dim::Dim1D, false, false, false, 1, format);
case TextureType::ColorArray1D:
return ctx.TypeImage(type, spv::Dim::Dim1D, false, true, false, 1, format);
case TextureType::Color2D:
return ctx.TypeImage(type, spv::Dim::Dim2D, false, false, false, 1, format);
case TextureType::ColorArray2D:
return ctx.TypeImage(type, spv::Dim::Dim2D, false, true, false, 1, format);
case TextureType::Color3D:
return ctx.TypeImage(type, spv::Dim::Dim3D, false, false, false, 1, format);
case TextureType::ColorCube:
return ctx.TypeImage(type, spv::Dim::Cube, false, false, false, 1, format);
case TextureType::ColorArrayCube:
return ctx.TypeImage(type, spv::Dim::Cube, false, true, false, 1, format);
case TextureType::Shadow1D:
return ctx.TypeImage(type, spv::Dim::Dim1D, true, false, false, 1, format);
case TextureType::ShadowArray1D:
return ctx.TypeImage(type, spv::Dim::Dim1D, true, true, false, 1, format);
case TextureType::Shadow2D:
return ctx.TypeImage(type, spv::Dim::Dim2D, true, false, false, 1, format);
case TextureType::ShadowArray2D:
return ctx.TypeImage(type, spv::Dim::Dim2D, true, true, false, 1, format);
case TextureType::Shadow3D:
return ctx.TypeImage(type, spv::Dim::Dim3D, true, false, false, 1, format);
case TextureType::ShadowCube:
return ctx.TypeImage(type, spv::Dim::Cube, true, false, false, 1, format);
case TextureType::ShadowArrayCube:
return ctx.TypeImage(type, spv::Dim::Cube, true, true, false, 1, format);
}
throw InvalidArgument("Invalid texture type {}", desc.type);
}
Id DefineVariable(EmitContext& ctx, Id type, std::optional<spv::BuiltIn> builtin,
spv::StorageClass storage_class) {
const Id pointer_type{ctx.TypePointer(storage_class, type)};
const Id id{ctx.AddGlobalVariable(pointer_type, storage_class)};
if (builtin) {
ctx.Decorate(id, spv::Decoration::BuiltIn, *builtin);
}
ctx.interfaces.push_back(id);
return id;
}
Id DefineInput(EmitContext& ctx, Id type, std::optional<spv::BuiltIn> builtin = std::nullopt) {
return DefineVariable(ctx, type, builtin, spv::StorageClass::Input);
}
Id DefineOutput(EmitContext& ctx, Id type, std::optional<spv::BuiltIn> builtin = std::nullopt) {
return DefineVariable(ctx, type, builtin, spv::StorageClass::Output);
}
Id GetAttributeType(EmitContext& ctx, AttributeType type) {
switch (type) {
case AttributeType::Float:
return ctx.F32[4];
case AttributeType::SignedInt:
return ctx.TypeVector(ctx.TypeInt(32, true), 4);
case AttributeType::UnsignedInt:
return ctx.U32[4];
case AttributeType::Disabled:
break;
}
throw InvalidArgument("Invalid attribute type {}", type);
}
struct AttrInfo {
Id pointer;
Id id;
bool needs_cast;
};
std::optional<AttrInfo> AttrTypes(EmitContext& ctx, u32 index) {
const AttributeType type{ctx.profile.generic_input_types.at(index)};
switch (type) {
case AttributeType::Float:
return AttrInfo{ctx.input_f32, ctx.F32[1], false};
case AttributeType::UnsignedInt:
return AttrInfo{ctx.input_u32, ctx.U32[1], true};
case AttributeType::SignedInt:
return AttrInfo{ctx.input_s32, ctx.TypeInt(32, true), true};
case AttributeType::Disabled:
return std::nullopt;
}
throw InvalidArgument("Invalid attribute type {}", type);
}
} // Anonymous namespace
void VectorTypes::Define(Sirit::Module& sirit_ctx, Id base_type, std::string_view name) {
defs[0] = sirit_ctx.Name(base_type, name);
std::array<char, 6> def_name;
for (int i = 1; i < 4; ++i) {
const std::string_view def_name_view(
def_name.data(),
fmt::format_to_n(def_name.data(), def_name.size(), "{}x{}", name, i + 1).size);
defs[i] = sirit_ctx.Name(sirit_ctx.TypeVector(base_type, i + 1), def_name_view);
}
}
EmitContext::EmitContext(const Profile& profile_, IR::Program& program, u32& binding)
: Sirit::Module(profile_.supported_spirv), profile{profile_}, stage{program.stage} {
AddCapability(spv::Capability::Shader);
DefineCommonTypes(program.info);
DefineCommonConstants();
DefineInterfaces(program.info);
DefineLocalMemory(program);
DefineSharedMemory(program);
DefineConstantBuffers(program.info, binding);
DefineStorageBuffers(program.info, binding);
DefineTextures(program.info, binding);
DefineAttributeMemAccess(program.info);
DefineLabels(program);
}
EmitContext::~EmitContext() = default;
Id EmitContext::Def(const IR::Value& value) {
if (!value.IsImmediate()) {
return value.InstRecursive()->Definition<Id>();
}
switch (value.Type()) {
case IR::Type::Void:
// Void instructions are used for optional arguments (e.g. texture offsets)
// They are not meant to be used in the SPIR-V module
return Id{};
case IR::Type::U1:
return value.U1() ? true_value : false_value;
case IR::Type::U32:
return Constant(U32[1], value.U32());
case IR::Type::U64:
return Constant(U64, value.U64());
case IR::Type::F32:
return Constant(F32[1], value.F32());
case IR::Type::F64:
return Constant(F64[1], value.F64());
case IR::Type::Label:
return value.Label()->Definition<Id>();
default:
throw NotImplementedException("Immediate type {}", value.Type());
}
}
void EmitContext::DefineCommonTypes(const Info& info) {
void_id = TypeVoid();
U1 = Name(TypeBool(), "u1");
F32.Define(*this, TypeFloat(32), "f32");
U32.Define(*this, TypeInt(32, false), "u32");
private_u32 = Name(TypePointer(spv::StorageClass::Private, U32[1]), "private_u32");
input_f32 = Name(TypePointer(spv::StorageClass::Input, F32[1]), "input_f32");
input_u32 = Name(TypePointer(spv::StorageClass::Input, U32[1]), "input_u32");
input_s32 = Name(TypePointer(spv::StorageClass::Input, TypeInt(32, true)), "input_s32");
output_f32 = Name(TypePointer(spv::StorageClass::Output, F32[1]), "output_f32");
if (info.uses_int8) {
AddCapability(spv::Capability::Int8);
U8 = Name(TypeInt(8, false), "u8");
S8 = Name(TypeInt(8, true), "s8");
}
if (info.uses_int16) {
AddCapability(spv::Capability::Int16);
U16 = Name(TypeInt(16, false), "u16");
S16 = Name(TypeInt(16, true), "s16");
}
if (info.uses_int64) {
AddCapability(spv::Capability::Int64);
U64 = Name(TypeInt(64, false), "u64");
}
if (info.uses_fp16) {
AddCapability(spv::Capability::Float16);
F16.Define(*this, TypeFloat(16), "f16");
}
if (info.uses_fp64) {
AddCapability(spv::Capability::Float64);
F64.Define(*this, TypeFloat(64), "f64");
}
}
void EmitContext::DefineCommonConstants() {
true_value = ConstantTrue(U1);
false_value = ConstantFalse(U1);
u32_zero_value = Constant(U32[1], 0U);
f32_zero_value = Constant(F32[1], 0.0f);
}
void EmitContext::DefineInterfaces(const Info& info) {
DefineInputs(info);
DefineOutputs(info);
}
void EmitContext::DefineLocalMemory(const IR::Program& program) {
if (program.local_memory_size == 0) {
return;
}
const u32 num_elements{Common::DivCeil(program.local_memory_size, 4U)};
const Id type{TypeArray(U32[1], Constant(U32[1], num_elements))};
const Id pointer{TypePointer(spv::StorageClass::Private, type)};
local_memory = AddGlobalVariable(pointer, spv::StorageClass::Private);
if (profile.supported_spirv >= 0x00010400) {
interfaces.push_back(local_memory);
}
}
void EmitContext::DefineSharedMemory(const IR::Program& program) {
if (program.shared_memory_size == 0) {
return;
}
const auto make{[&](Id element_type, u32 element_size) {
const u32 num_elements{Common::DivCeil(program.shared_memory_size, element_size)};
const Id array_type{TypeArray(element_type, Constant(U32[1], num_elements))};
Decorate(array_type, spv::Decoration::ArrayStride, element_size);
const Id struct_type{TypeStruct(array_type)};
MemberDecorate(struct_type, 0U, spv::Decoration::Offset, 0U);
Decorate(struct_type, spv::Decoration::Block);
const Id pointer{TypePointer(spv::StorageClass::Workgroup, struct_type)};
const Id element_pointer{TypePointer(spv::StorageClass::Workgroup, element_type)};
const Id variable{AddGlobalVariable(pointer, spv::StorageClass::Workgroup)};
Decorate(variable, spv::Decoration::Aliased);
interfaces.push_back(variable);
return std::make_pair(variable, element_pointer);
}};
if (profile.support_explicit_workgroup_layout) {
AddExtension("SPV_KHR_workgroup_memory_explicit_layout");
AddCapability(spv::Capability::WorkgroupMemoryExplicitLayoutKHR);
if (program.info.uses_int8) {
AddCapability(spv::Capability::WorkgroupMemoryExplicitLayout8BitAccessKHR);
std::tie(shared_memory_u8, shared_u8) = make(U8, 1);
}
if (program.info.uses_int16) {
AddCapability(spv::Capability::WorkgroupMemoryExplicitLayout16BitAccessKHR);
std::tie(shared_memory_u16, shared_u16) = make(U16, 2);
}
std::tie(shared_memory_u32, shared_u32) = make(U32[1], 4);
std::tie(shared_memory_u32x2, shared_u32x2) = make(U32[2], 8);
std::tie(shared_memory_u32x4, shared_u32x4) = make(U32[4], 16);
return;
}
const u32 num_elements{Common::DivCeil(program.shared_memory_size, 4U)};
const Id type{TypeArray(U32[1], Constant(U32[1], num_elements))};
const Id pointer_type{TypePointer(spv::StorageClass::Workgroup, type)};
shared_u32 = TypePointer(spv::StorageClass::Workgroup, U32[1]);
shared_memory_u32 = AddGlobalVariable(pointer_type, spv::StorageClass::Workgroup);
interfaces.push_back(shared_memory_u32);
const Id func_type{TypeFunction(void_id, U32[1], U32[1])};
const auto make_function{[&](u32 mask, u32 size) {
const Id loop_header{OpLabel()};
const Id continue_block{OpLabel()};
const Id merge_block{OpLabel()};
const Id func{OpFunction(void_id, spv::FunctionControlMask::MaskNone, func_type)};
const Id offset{OpFunctionParameter(U32[1])};
const Id insert_value{OpFunctionParameter(U32[1])};
AddLabel();
OpBranch(loop_header);
AddLabel(loop_header);
const Id word_offset{OpShiftRightArithmetic(U32[1], offset, Constant(U32[1], 2U))};
const Id shift_offset{OpShiftLeftLogical(U32[1], offset, Constant(U32[1], 3U))};
const Id bit_offset{OpBitwiseAnd(U32[1], shift_offset, Constant(U32[1], mask))};
const Id count{Constant(U32[1], size)};
OpLoopMerge(merge_block, continue_block, spv::LoopControlMask::MaskNone);
OpBranch(continue_block);
AddLabel(continue_block);
const Id word_pointer{OpAccessChain(shared_u32, shared_memory_u32, word_offset)};
const Id old_value{OpLoad(U32[1], word_pointer)};
const Id new_value{OpBitFieldInsert(U32[1], old_value, insert_value, bit_offset, count)};
const Id atomic_res{OpAtomicCompareExchange(U32[1], word_pointer, Constant(U32[1], 1U),
u32_zero_value, u32_zero_value, new_value,
old_value)};
const Id success{OpIEqual(U1, atomic_res, old_value)};
OpBranchConditional(success, merge_block, loop_header);
AddLabel(merge_block);
OpReturn();
OpFunctionEnd();
return func;
}};
if (program.info.uses_int8) {
shared_store_u8_func = make_function(24, 8);
}
if (program.info.uses_int16) {
shared_store_u16_func = make_function(16, 16);
}
}
void EmitContext::DefineAttributeMemAccess(const Info& info) {
const auto make_load{[&] {
const Id end_block{OpLabel()};
const Id default_label{OpLabel()};
const Id func_type_load{TypeFunction(F32[1], U32[1])};
const Id func{OpFunction(F32[1], spv::FunctionControlMask::MaskNone, func_type_load)};
const Id offset{OpFunctionParameter(U32[1])};
AddLabel();
const Id base_index{OpShiftRightArithmetic(U32[1], offset, Constant(U32[1], 2U))};
const Id masked_index{OpBitwiseAnd(U32[1], base_index, Constant(U32[1], 3U))};
const Id compare_index{OpShiftRightArithmetic(U32[1], base_index, Constant(U32[1], 2U))};
std::vector<Sirit::Literal> literals;
std::vector<Id> labels;
if (info.loads_position) {
literals.push_back(static_cast<u32>(IR::Attribute::PositionX) >> 2);
labels.push_back(OpLabel());
}
const u32 base_attribute_value = static_cast<u32>(IR::Attribute::Generic0X) >> 2;
for (u32 i = 0; i < info.input_generics.size(); i++) {
if (!info.input_generics[i].used) {
continue;
}
literals.push_back(base_attribute_value + i);
labels.push_back(OpLabel());
}
OpSelectionMerge(end_block, spv::SelectionControlMask::MaskNone);
OpSwitch(compare_index, default_label, literals, labels);
AddLabel(default_label);
OpReturnValue(Constant(F32[1], 0.0f));
size_t label_index{0};
if (info.loads_position) {
AddLabel(labels[label_index]);
const Id result{OpLoad(F32[1], OpAccessChain(input_f32, input_position, masked_index))};
OpReturnValue(result);
++label_index;
}
for (size_t i = 0; i < info.input_generics.size(); i++) {
if (!info.input_generics[i].used) {
continue;
}
AddLabel(labels[label_index]);
const auto type{AttrTypes(*this, static_cast<u32>(i))};
if (!type) {
OpReturnValue(Constant(F32[1], 0.0f));
++label_index;
continue;
}
const Id generic_id{input_generics.at(i)};
const Id pointer{OpAccessChain(type->pointer, generic_id, masked_index)};
const Id value{OpLoad(type->id, pointer)};
const Id result{type->needs_cast ? OpBitcast(F32[1], value) : value};
OpReturnValue(result);
++label_index;
}
AddLabel(end_block);
OpUnreachable();
OpFunctionEnd();
return func;
}};
const auto make_store{[&] {
const Id end_block{OpLabel()};
const Id default_label{OpLabel()};
const Id func_type_store{TypeFunction(void_id, U32[1], F32[1])};
const Id func{OpFunction(void_id, spv::FunctionControlMask::MaskNone, func_type_store)};
const Id offset{OpFunctionParameter(U32[1])};
const Id store_value{OpFunctionParameter(F32[1])};
AddLabel();
const Id base_index{OpShiftRightArithmetic(U32[1], offset, Constant(U32[1], 2U))};
const Id masked_index{OpBitwiseAnd(U32[1], base_index, Constant(U32[1], 3U))};
const Id compare_index{OpShiftRightArithmetic(U32[1], base_index, Constant(U32[1], 2U))};
std::vector<Sirit::Literal> literals;
std::vector<Id> labels;
if (info.stores_position) {
literals.push_back(static_cast<u32>(IR::Attribute::PositionX) >> 2);
labels.push_back(OpLabel());
}
const u32 base_attribute_value = static_cast<u32>(IR::Attribute::Generic0X) >> 2;
for (size_t i = 0; i < info.stores_generics.size(); i++) {
if (!info.stores_generics[i]) {
continue;
}
literals.push_back(base_attribute_value + static_cast<u32>(i));
labels.push_back(OpLabel());
}
if (info.stores_clip_distance) {
literals.push_back(static_cast<u32>(IR::Attribute::ClipDistance0) >> 2);
labels.push_back(OpLabel());
literals.push_back(static_cast<u32>(IR::Attribute::ClipDistance4) >> 2);
labels.push_back(OpLabel());
}
OpSelectionMerge(end_block, spv::SelectionControlMask::MaskNone);
OpSwitch(compare_index, default_label, literals, labels);
AddLabel(default_label);
OpReturn();
size_t label_index{0};
if (info.stores_position) {
AddLabel(labels[label_index]);
const Id pointer{OpAccessChain(output_f32, output_position, masked_index)};
OpStore(pointer, store_value);
OpReturn();
++label_index;
}
for (size_t i = 0; i < info.stores_generics.size(); i++) {
if (!info.stores_generics[i]) {
continue;
}
AddLabel(labels[label_index]);
const Id generic_id{output_generics.at(i)};
const Id pointer{OpAccessChain(output_f32, generic_id, masked_index)};
OpStore(pointer, store_value);
OpReturn();
++label_index;
}
if (info.stores_clip_distance) {
AddLabel(labels[label_index]);
const Id pointer{OpAccessChain(output_f32, clip_distances, masked_index)};
OpStore(pointer, store_value);
OpReturn();
++label_index;
AddLabel(labels[label_index]);
const Id fixed_index{OpIAdd(U32[1], masked_index, Constant(U32[1], 4))};
const Id pointer2{OpAccessChain(output_f32, clip_distances, fixed_index)};
OpStore(pointer2, store_value);
OpReturn();
++label_index;
}
AddLabel(end_block);
OpUnreachable();
OpFunctionEnd();
return func;
}};
if (info.loads_indexed_attributes) {
indexed_load_func = make_load();
}
if (info.stores_indexed_attributes) {
indexed_store_func = make_store();
}
}
void EmitContext::DefineConstantBuffers(const Info& info, u32& binding) {
if (info.constant_buffer_descriptors.empty()) {
return;
}
if (True(info.used_constant_buffer_types & IR::Type::U8)) {
DefineConstantBuffers(info, &UniformDefinitions::U8, binding, U8, 'u', sizeof(u8));
DefineConstantBuffers(info, &UniformDefinitions::S8, binding, S8, 's', sizeof(s8));
}
if (True(info.used_constant_buffer_types & IR::Type::U16)) {
DefineConstantBuffers(info, &UniformDefinitions::U16, binding, U16, 'u', sizeof(u16));
DefineConstantBuffers(info, &UniformDefinitions::S16, binding, S16, 's', sizeof(s16));
}
if (True(info.used_constant_buffer_types & IR::Type::U32)) {
DefineConstantBuffers(info, &UniformDefinitions::U32, binding, U32[1], 'u', sizeof(u32));
}
if (True(info.used_constant_buffer_types & IR::Type::F32)) {
DefineConstantBuffers(info, &UniformDefinitions::F32, binding, F32[1], 'f', sizeof(f32));
}
if (True(info.used_constant_buffer_types & IR::Type::U32x2)) {
DefineConstantBuffers(info, &UniformDefinitions::U32x2, binding, U32[2], 'u', sizeof(u64));
}
for (const ConstantBufferDescriptor& desc : info.constant_buffer_descriptors) {
binding += desc.count;
}
}
void EmitContext::DefineStorageBuffers(const Info& info, u32& binding) {
if (info.storage_buffers_descriptors.empty()) {
return;
}
AddExtension("SPV_KHR_storage_buffer_storage_class");
const Id array_type{TypeRuntimeArray(U32[1])};
Decorate(array_type, spv::Decoration::ArrayStride, 4U);
const Id struct_type{TypeStruct(array_type)};
Name(struct_type, "ssbo_block");
Decorate(struct_type, spv::Decoration::Block);
MemberName(struct_type, 0, "data");
MemberDecorate(struct_type, 0, spv::Decoration::Offset, 0U);
const Id storage_type{TypePointer(spv::StorageClass::StorageBuffer, struct_type)};
storage_u32 = TypePointer(spv::StorageClass::StorageBuffer, U32[1]);
u32 index{};
for (const StorageBufferDescriptor& desc : info.storage_buffers_descriptors) {
const Id id{AddGlobalVariable(storage_type, spv::StorageClass::StorageBuffer)};
Decorate(id, spv::Decoration::Binding, binding);
Decorate(id, spv::Decoration::DescriptorSet, 0U);
Name(id, fmt::format("ssbo{}", index));
if (profile.supported_spirv >= 0x00010400) {
interfaces.push_back(id);
}
std::fill_n(ssbos.data() + index, desc.count, id);
index += desc.count;
binding += desc.count;
}
}
void EmitContext::DefineTextures(const Info& info, u32& binding) {
textures.reserve(info.texture_descriptors.size());
for (const TextureDescriptor& desc : info.texture_descriptors) {
if (desc.count != 1) {
throw NotImplementedException("Array of textures");
}
const Id image_type{ImageType(*this, desc)};
const Id sampled_type{TypeSampledImage(image_type)};
const Id pointer_type{TypePointer(spv::StorageClass::UniformConstant, sampled_type)};
const Id id{AddGlobalVariable(pointer_type, spv::StorageClass::UniformConstant)};
Decorate(id, spv::Decoration::Binding, binding);
Decorate(id, spv::Decoration::DescriptorSet, 0U);
Name(id, fmt::format("tex{}_{:02x}", desc.cbuf_index, desc.cbuf_offset));
for (u32 index = 0; index < desc.count; ++index) {
// TODO: Pass count info
textures.push_back(TextureDefinition{
.id{id},
.sampled_type{sampled_type},
.image_type{image_type},
});
}
if (profile.supported_spirv >= 0x00010400) {
interfaces.push_back(id);
}
binding += desc.count;
}
}
void EmitContext::DefineLabels(IR::Program& program) {
for (IR::Block* const block : program.blocks) {
block->SetDefinition(OpLabel());
}
}
void EmitContext::DefineInputs(const Info& info) {
if (info.uses_workgroup_id) {
workgroup_id = DefineInput(*this, U32[3], spv::BuiltIn::WorkgroupId);
}
if (info.uses_local_invocation_id) {
local_invocation_id = DefineInput(*this, U32[3], spv::BuiltIn::LocalInvocationId);
}
if (info.uses_subgroup_mask) {
subgroup_mask_eq = DefineInput(*this, U32[4], spv::BuiltIn::SubgroupEqMaskKHR);
subgroup_mask_lt = DefineInput(*this, U32[4], spv::BuiltIn::SubgroupLtMaskKHR);
subgroup_mask_le = DefineInput(*this, U32[4], spv::BuiltIn::SubgroupLeMaskKHR);
subgroup_mask_gt = DefineInput(*this, U32[4], spv::BuiltIn::SubgroupGtMaskKHR);
subgroup_mask_ge = DefineInput(*this, U32[4], spv::BuiltIn::SubgroupGeMaskKHR);
}
if (info.uses_subgroup_invocation_id ||
(profile.warp_size_potentially_larger_than_guest &&
(info.uses_subgroup_vote || info.uses_subgroup_mask))) {
subgroup_local_invocation_id =
DefineInput(*this, U32[1], spv::BuiltIn::SubgroupLocalInvocationId);
}
if (info.uses_fswzadd) {
const Id f32_one{Constant(F32[1], 1.0f)};
const Id f32_minus_one{Constant(F32[1], -1.0f)};
const Id f32_zero{Constant(F32[1], 0.0f)};
fswzadd_lut_a = ConstantComposite(F32[4], f32_minus_one, f32_one, f32_minus_one, f32_zero);
fswzadd_lut_b =
ConstantComposite(F32[4], f32_minus_one, f32_minus_one, f32_one, f32_minus_one);
}
if (info.loads_position) {
const bool is_fragment{stage != Stage::Fragment};
const spv::BuiltIn built_in{is_fragment ? spv::BuiltIn::Position : spv::BuiltIn::FragCoord};
input_position = DefineInput(*this, F32[4], built_in);
}
if (info.loads_instance_id) {
if (profile.support_vertex_instance_id) {
instance_id = DefineInput(*this, U32[1], spv::BuiltIn::InstanceId);
} else {
instance_index = DefineInput(*this, U32[1], spv::BuiltIn::InstanceIndex);
base_instance = DefineInput(*this, U32[1], spv::BuiltIn::BaseInstance);
}
}
if (info.loads_vertex_id) {
if (profile.support_vertex_instance_id) {
vertex_id = DefineInput(*this, U32[1], spv::BuiltIn::VertexId);
} else {
vertex_index = DefineInput(*this, U32[1], spv::BuiltIn::VertexIndex);
base_vertex = DefineInput(*this, U32[1], spv::BuiltIn::BaseVertex);
}
}
if (info.loads_front_face) {
front_face = DefineInput(*this, U1, spv::BuiltIn::FrontFacing);
}
if (info.loads_point_coord) {
point_coord = DefineInput(*this, F32[2], spv::BuiltIn::PointCoord);
}
for (size_t index = 0; index < info.input_generics.size(); ++index) {
const InputVarying generic{info.input_generics[index]};
if (!generic.used) {
continue;
}
const AttributeType input_type{profile.generic_input_types[index]};
if (input_type == AttributeType::Disabled) {
continue;
}
const Id type{GetAttributeType(*this, input_type)};
const Id id{DefineInput(*this, type)};
Decorate(id, spv::Decoration::Location, static_cast<u32>(index));
Name(id, fmt::format("in_attr{}", index));
input_generics[index] = id;
if (stage != Stage::Fragment) {
continue;
}
switch (generic.interpolation) {
case Interpolation::Smooth:
// Default
// Decorate(id, spv::Decoration::Smooth);
break;
case Interpolation::NoPerspective:
Decorate(id, spv::Decoration::NoPerspective);
break;
case Interpolation::Flat:
Decorate(id, spv::Decoration::Flat);
break;
}
}
}
void EmitContext::DefineConstantBuffers(const Info& info, Id UniformDefinitions::*member_type,
u32 binding, Id type, char type_char, u32 element_size) {
const Id array_type{TypeArray(type, Constant(U32[1], 65536U / element_size))};
Decorate(array_type, spv::Decoration::ArrayStride, element_size);
const Id struct_type{TypeStruct(array_type)};
Name(struct_type, fmt::format("cbuf_block_{}{}", type_char, element_size * CHAR_BIT));
Decorate(struct_type, spv::Decoration::Block);
MemberName(struct_type, 0, "data");
MemberDecorate(struct_type, 0, spv::Decoration::Offset, 0U);
const Id struct_pointer_type{TypePointer(spv::StorageClass::Uniform, struct_type)};
const Id uniform_type{TypePointer(spv::StorageClass::Uniform, type)};
uniform_types.*member_type = uniform_type;
for (const ConstantBufferDescriptor& desc : info.constant_buffer_descriptors) {
const Id id{AddGlobalVariable(struct_pointer_type, spv::StorageClass::Uniform)};
Decorate(id, spv::Decoration::Binding, binding);
Decorate(id, spv::Decoration::DescriptorSet, 0U);
Name(id, fmt::format("c{}", desc.index));
for (size_t i = 0; i < desc.count; ++i) {
cbufs[desc.index + i].*member_type = id;
}
if (profile.supported_spirv >= 0x00010400) {
interfaces.push_back(id);
}
binding += desc.count;
}
}
void EmitContext::DefineOutputs(const Info& info) {
if (info.stores_position || stage == Stage::VertexB) {
output_position = DefineOutput(*this, F32[4], spv::BuiltIn::Position);
}
if (info.stores_point_size || profile.fixed_state_point_size) {
if (stage == Stage::Fragment) {
throw NotImplementedException("Storing PointSize in Fragment stage");
}
output_point_size = DefineOutput(*this, F32[1], spv::BuiltIn::PointSize);
}
if (info.stores_clip_distance) {
if (stage == Stage::Fragment) {
throw NotImplementedException("Storing PointSize in Fragment stage");
}
const Id type{TypeArray(F32[1], Constant(U32[1], 8U))};
clip_distances = DefineOutput(*this, type, spv::BuiltIn::ClipDistance);
}
if (info.stores_viewport_index &&
(profile.support_viewport_index_layer_non_geometry || stage == Shader::Stage::Geometry)) {
if (stage == Stage::Fragment) {
throw NotImplementedException("Storing ViewportIndex in Fragment stage");
}
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));
}
}
if (stage == Stage::Fragment) {
for (u32 index = 0; index < 8; ++index) {
if (!info.stores_frag_color[index]) {
continue;
}
frag_color[index] = DefineOutput(*this, F32[4]);
Decorate(frag_color[index], spv::Decoration::Location, index);
Name(frag_color[index], fmt::format("frag_color{}", index));
}
if (info.stores_frag_depth) {
frag_depth = DefineOutput(*this, F32[1]);
Decorate(frag_depth, spv::Decoration::BuiltIn, spv::BuiltIn::FragDepth);
Name(frag_depth, "frag_depth");
}
}
}
} // namespace Shader::Backend::SPIRV