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shader: Implement tessellation shaders, polygon mode and invocation id

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This commit is contained in:
ReinUsesLisp 2021-04-15 22:46:11 -03:00 • committed by ameerj
parent 34519d3fc6
commit 183855e396
28 changed files with 605 additions and 91 deletions
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147
src/shader_recompiler/backend/spirv/emit_context.cpp
View file

@ -125,19 +125,36 @@ u32 NumVertices(InputTopology input_topology) {
throw InvalidArgument("Invalid input topology {}", input_topology);
}
Id DefineInput(EmitContext& ctx, Id type, std::optional<spv::BuiltIn> builtin = std::nullopt) {
if (ctx.stage == Stage::Geometry) {
const u32 num_vertices{NumVertices(ctx.profile.input_topology)};
type = ctx.TypeArray(type, ctx.Constant(ctx.U32[1], num_vertices));
Id DefineInput(EmitContext& ctx, Id type, bool per_invocation,
std::optional<spv::BuiltIn> builtin = std::nullopt) {
switch (ctx.stage) {
case Stage::TessellationControl:
case Stage::TessellationEval:
if (per_invocation) {
type = ctx.TypeArray(type, ctx.Constant(ctx.U32[1], 32u));
}
break;
case Stage::Geometry:
if (per_invocation) {
const u32 num_vertices{NumVertices(ctx.profile.input_topology)};
type = ctx.TypeArray(type, ctx.Constant(ctx.U32[1], num_vertices));
}
break;
default:
break;
}
return DefineVariable(ctx, type, builtin, spv::StorageClass::Input);
}
Id DefineOutput(EmitContext& ctx, Id type, std::optional<spv::BuiltIn> builtin = std::nullopt) {
Id DefineOutput(EmitContext& ctx, Id type, std::optional<u32> invocations,
std::optional<spv::BuiltIn> builtin = std::nullopt) {
if (invocations && ctx.stage == Stage::TessellationControl) {
type = ctx.TypeArray(type, ctx.Constant(ctx.U32[1], *invocations));
}
return DefineVariable(ctx, type, builtin, spv::StorageClass::Output);
}
void DefineGenericOutput(EmitContext& ctx, size_t index) {
void DefineGenericOutput(EmitContext& ctx, size_t index, std::optional<u32> invocations) {
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};
@ -150,7 +167,7 @@ void DefineGenericOutput(EmitContext& ctx, size_t index) {
}
const u32 num_components{xfb_varying ? xfb_varying->components : remainder};
const Id id{DefineOutput(ctx, ctx.F32[num_components])};
const Id id{DefineOutput(ctx, ctx.F32[num_components], invocations)};
ctx.Decorate(id, spv::Decoration::Location, static_cast<u32>(index));
if (element > 0) {
ctx.Decorate(id, spv::Decoration::Component, element);
@ -161,10 +178,10 @@ void DefineGenericOutput(EmitContext& ctx, size_t index) {
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));
} else {
ctx.Name(id, fmt::format("out_attr{}", index));
}
const GenericElementInfo info{
.id = id,
@ -383,7 +400,7 @@ EmitContext::EmitContext(const Profile& profile_, IR::Program& program, u32& bin
AddCapability(spv::Capability::Shader);
DefineCommonTypes(program.info);
DefineCommonConstants();
DefineInterfaces(program.info);
DefineInterfaces(program);
DefineLocalMemory(program);
DefineSharedMemory(program);
DefineSharedMemoryFunctions(program);
@ -472,9 +489,9 @@ void EmitContext::DefineCommonConstants() {
f32_zero_value = Constant(F32[1], 0.0f);
}
void EmitContext::DefineInterfaces(const Info& info) {
DefineInputs(info);
DefineOutputs(info);
void EmitContext::DefineInterfaces(const IR::Program& program) {
DefineInputs(program.info);
DefineOutputs(program);
}
void EmitContext::DefineLocalMemory(const IR::Program& program) {
@ -972,26 +989,29 @@ void EmitContext::DefineLabels(IR::Program& program) {
void EmitContext::DefineInputs(const Info& info) {
if (info.uses_workgroup_id) {
workgroup_id = DefineInput(*this, U32[3], spv::BuiltIn::WorkgroupId);
workgroup_id = DefineInput(*this, U32[3], false, spv::BuiltIn::WorkgroupId);
}
if (info.uses_local_invocation_id) {
local_invocation_id = DefineInput(*this, U32[3], spv::BuiltIn::LocalInvocationId);
local_invocation_id = DefineInput(*this, U32[3], false, spv::BuiltIn::LocalInvocationId);
}
if (info.uses_invocation_id) {
invocation_id = DefineInput(*this, U32[1], false, spv::BuiltIn::InvocationId);
}
if (info.uses_is_helper_invocation) {
is_helper_invocation = DefineInput(*this, U1, spv::BuiltIn::HelperInvocation);
is_helper_invocation = DefineInput(*this, U1, false, spv::BuiltIn::HelperInvocation);
}
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);
subgroup_mask_eq = DefineInput(*this, U32[4], false, spv::BuiltIn::SubgroupEqMaskKHR);
subgroup_mask_lt = DefineInput(*this, U32[4], false, spv::BuiltIn::SubgroupLtMaskKHR);
subgroup_mask_le = DefineInput(*this, U32[4], false, spv::BuiltIn::SubgroupLeMaskKHR);
subgroup_mask_gt = DefineInput(*this, U32[4], false, spv::BuiltIn::SubgroupGtMaskKHR);
subgroup_mask_ge = DefineInput(*this, U32[4], false, 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);
DefineInput(*this, U32[1], false, spv::BuiltIn::SubgroupLocalInvocationId);
}
if (info.uses_fswzadd) {
const Id f32_one{Constant(F32[1], 1.0f)};
@ -1004,29 +1024,32 @@ void EmitContext::DefineInputs(const Info& info) {
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);
input_position = DefineInput(*this, F32[4], true, built_in);
}
if (info.loads_instance_id) {
if (profile.support_vertex_instance_id) {
instance_id = DefineInput(*this, U32[1], spv::BuiltIn::InstanceId);
instance_id = DefineInput(*this, U32[1], true, spv::BuiltIn::InstanceId);
} else {
instance_index = DefineInput(*this, U32[1], spv::BuiltIn::InstanceIndex);
base_instance = DefineInput(*this, U32[1], spv::BuiltIn::BaseInstance);
instance_index = DefineInput(*this, U32[1], true, spv::BuiltIn::InstanceIndex);
base_instance = DefineInput(*this, U32[1], true, spv::BuiltIn::BaseInstance);
}
}
if (info.loads_vertex_id) {
if (profile.support_vertex_instance_id) {
vertex_id = DefineInput(*this, U32[1], spv::BuiltIn::VertexId);
vertex_id = DefineInput(*this, U32[1], true, spv::BuiltIn::VertexId);
} else {
vertex_index = DefineInput(*this, U32[1], spv::BuiltIn::VertexIndex);
base_vertex = DefineInput(*this, U32[1], spv::BuiltIn::BaseVertex);
vertex_index = DefineInput(*this, U32[1], true, spv::BuiltIn::VertexIndex);
base_vertex = DefineInput(*this, U32[1], true, spv::BuiltIn::BaseVertex);
}
}
if (info.loads_front_face) {
front_face = DefineInput(*this, U1, spv::BuiltIn::FrontFacing);
front_face = DefineInput(*this, U1, true, spv::BuiltIn::FrontFacing);
}
if (info.loads_point_coord) {
point_coord = DefineInput(*this, F32[2], spv::BuiltIn::PointCoord);
point_coord = DefineInput(*this, F32[2], true, spv::BuiltIn::PointCoord);
}
if (info.loads_tess_coord) {
tess_coord = DefineInput(*this, F32[3], false, spv::BuiltIn::TessCoord);
}
for (size_t index = 0; index < info.input_generics.size(); ++index) {
const InputVarying generic{info.input_generics[index]};
@ -1038,7 +1061,7 @@ void EmitContext::DefineInputs(const Info& info) {
continue;
}
const Id type{GetAttributeType(*this, input_type)};
const Id id{DefineInput(*this, type)};
const Id id{DefineInput(*this, type, true)};
Decorate(id, spv::Decoration::Location, static_cast<u32>(index));
Name(id, fmt::format("in_attr{}", index));
input_generics[index] = id;
@ -1059,58 +1082,98 @@ void EmitContext::DefineInputs(const Info& info) {
break;
}
}
if (stage == Stage::TessellationEval) {
for (size_t index = 0; index < info.uses_patches.size(); ++index) {
if (!info.uses_patches[index]) {
continue;
}
const Id id{DefineInput(*this, F32[4], false)};
Decorate(id, spv::Decoration::Patch);
Decorate(id, spv::Decoration::Location, static_cast<u32>(index));
patches[index] = id;
}
}
}
void EmitContext::DefineOutputs(const Info& info) {
void EmitContext::DefineOutputs(const IR::Program& program) {
const Info& info{program.info};
const std::optional<u32> invocations{program.invocations};
if (info.stores_position || stage == Stage::VertexB) {
output_position = DefineOutput(*this, F32[4], spv::BuiltIn::Position);
output_position = DefineOutput(*this, F32[4], invocations, 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);
output_point_size = DefineOutput(*this, F32[1], invocations, spv::BuiltIn::PointSize);
}
if (info.stores_clip_distance) {
if (stage == Stage::Fragment) {
throw NotImplementedException("Storing ClipDistance in fragment stage");
}
const Id type{TypeArray(F32[1], Constant(U32[1], 8U))};
clip_distances = DefineOutput(*this, type, spv::BuiltIn::ClipDistance);
clip_distances = DefineOutput(*this, type, invocations, spv::BuiltIn::ClipDistance);
}
if (info.stores_layer &&
(profile.support_viewport_index_layer_non_geometry || stage == Stage::Geometry)) {
if (stage == Stage::Fragment) {
throw NotImplementedException("Storing Layer in fragment stage");
}
layer = DefineOutput(*this, U32[1], spv::BuiltIn::Layer);
layer = DefineOutput(*this, U32[1], invocations, spv::BuiltIn::Layer);
}
if (info.stores_viewport_index &&
(profile.support_viewport_index_layer_non_geometry || stage == Stage::Geometry)) {
if (stage == Stage::Fragment) {
throw NotImplementedException("Storing ViewportIndex in fragment stage");
}
viewport_index = DefineOutput(*this, U32[1], spv::BuiltIn::ViewportIndex);
viewport_index = DefineOutput(*this, U32[1], invocations, spv::BuiltIn::ViewportIndex);
}
for (size_t index = 0; index < info.stores_generics.size(); ++index) {
if (info.stores_generics[index]) {
DefineGenericOutput(*this, index);
DefineGenericOutput(*this, index, invocations);
}
}
if (stage == Stage::Fragment) {
switch (stage) {
case Stage::TessellationControl:
if (info.stores_tess_level_outer) {
const Id type{TypeArray(F32[1], Constant(U32[1], 4))};
output_tess_level_outer =
DefineOutput(*this, type, std::nullopt, spv::BuiltIn::TessLevelOuter);
Decorate(output_tess_level_outer, spv::Decoration::Patch);
}
if (info.stores_tess_level_inner) {
const Id type{TypeArray(F32[1], Constant(U32[1], 2))};
output_tess_level_inner =
DefineOutput(*this, type, std::nullopt, spv::BuiltIn::TessLevelInner);
Decorate(output_tess_level_inner, spv::Decoration::Patch);
}
for (size_t index = 0; index < info.uses_patches.size(); ++index) {
if (!info.uses_patches[index]) {
continue;
}
const Id id{DefineOutput(*this, F32[4], std::nullopt)};
Decorate(id, spv::Decoration::Patch);
Decorate(id, spv::Decoration::Location, static_cast<u32>(index));
patches[index] = id;
}
break;
case Stage::Fragment:
for (u32 index = 0; index < 8; ++index) {
if (!info.stores_frag_color[index]) {
continue;
}
frag_color[index] = DefineOutput(*this, F32[4]);
frag_color[index] = DefineOutput(*this, F32[4], std::nullopt);
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]);
frag_depth = DefineOutput(*this, F32[1], std::nullopt);
Decorate(frag_depth, spv::Decoration::BuiltIn, spv::BuiltIn::FragDepth);
Name(frag_depth, "frag_depth");
}
break;
default:
break;
}
}

10
src/shader_recompiler/backend/spirv/emit_context.h
View file

@ -147,6 +147,7 @@ public:
Id workgroup_id{};
Id local_invocation_id{};
Id invocation_id{};
Id is_helper_invocation{};
Id subgroup_local_invocation_id{};
Id subgroup_mask_eq{};
@ -162,6 +163,7 @@ public:
Id base_vertex{};
Id front_face{};
Id point_coord{};
Id tess_coord{};
Id clip_distances{};
Id layer{};
Id viewport_index{};
@ -204,6 +206,10 @@ public:
Id output_position{};
std::array<std::array<GenericElementInfo, 4>, 32> output_generics{};
Id output_tess_level_outer{};
Id output_tess_level_inner{};
std::array<Id, 30> patches{};
std::array<Id, 8> frag_color{};
Id frag_depth{};
@ -212,7 +218,7 @@ public:
private:
void DefineCommonTypes(const Info& info);
void DefineCommonConstants();
void DefineInterfaces(const Info& info);
void DefineInterfaces(const IR::Program& program);
void DefineLocalMemory(const IR::Program& program);
void DefineSharedMemory(const IR::Program& program);
void DefineSharedMemoryFunctions(const IR::Program& program);
@ -226,7 +232,7 @@ private:
void DefineLabels(IR::Program& program);
void DefineInputs(const Info& info);
void DefineOutputs(const Info& info);
void DefineOutputs(const IR::Program& program);
};
} // namespace Shader::Backend::SPIRV

39
src/shader_recompiler/backend/spirv/emit_spirv.cpp
View file

@ -45,6 +45,8 @@ ArgType Arg(EmitContext& ctx, const IR::Value& arg) {
return arg.Label();
} else if constexpr (std::is_same_v<ArgType, IR::Attribute>) {
return arg.Attribute();
} else if constexpr (std::is_same_v<ArgType, IR::Patch>) {
return arg.Patch();
} else if constexpr (std::is_same_v<ArgType, IR::Reg>) {
return arg.Reg();
}
@ -120,6 +122,30 @@ Id DefineMain(EmitContext& ctx, IR::Program& program) {
return main;
}
spv::ExecutionMode ExecutionMode(TessPrimitive primitive) {
switch (primitive) {
case TessPrimitive::Isolines:
return spv::ExecutionMode::Isolines;
case TessPrimitive::Triangles:
return spv::ExecutionMode::Triangles;
case TessPrimitive::Quads:
return spv::ExecutionMode::Quads;
}
throw InvalidArgument("Tessellation primitive {}", primitive);
}
spv::ExecutionMode ExecutionMode(TessSpacing spacing) {
switch (spacing) {
case TessSpacing::Equal:
return spv::ExecutionMode::SpacingEqual;
case TessSpacing::FractionalOdd:
return spv::ExecutionMode::SpacingFractionalOdd;
case TessSpacing::FractionalEven:
return spv::ExecutionMode::SpacingFractionalEven;
}
throw InvalidArgument("Tessellation spacing {}", spacing);
}
void DefineEntryPoint(const IR::Program& program, EmitContext& ctx, Id main) {
const std::span interfaces(ctx.interfaces.data(), ctx.interfaces.size());
spv::ExecutionModel execution_model{};
@ -134,6 +160,19 @@ void DefineEntryPoint(const IR::Program& program, EmitContext& ctx, Id main) {
case Stage::VertexB:
execution_model = spv::ExecutionModel::Vertex;
break;
case Stage::TessellationControl:
execution_model = spv::ExecutionModel::TessellationControl;
ctx.AddCapability(spv::Capability::Tessellation);
ctx.AddExecutionMode(main, spv::ExecutionMode::OutputVertices, program.invocations);
break;
case Stage::TessellationEval:
execution_model = spv::ExecutionModel::TessellationEvaluation;
ctx.AddCapability(spv::Capability::Tessellation);
ctx.AddExecutionMode(main, ExecutionMode(ctx.profile.tess_primitive));
ctx.AddExecutionMode(main, ExecutionMode(ctx.profile.tess_spacing));
ctx.AddExecutionMode(main, ctx.profile.tess_clockwise ? spv::ExecutionMode::VertexOrderCw
: spv::ExecutionMode::VertexOrderCcw);
break;
case Stage::Geometry:
execution_model = spv::ExecutionModel::Geometry;
ctx.AddCapability(spv::Capability::Geometry);

3
src/shader_recompiler/backend/spirv/emit_spirv.h
View file

@ -55,6 +55,8 @@ Id EmitGetAttribute(EmitContext& ctx, IR::Attribute attr, Id vertex);
void EmitSetAttribute(EmitContext& ctx, IR::Attribute attr, Id value, Id vertex);
Id EmitGetAttributeIndexed(EmitContext& ctx, Id offset, Id vertex);
void EmitSetAttributeIndexed(EmitContext& ctx, Id offset, Id value, Id vertex);
Id EmitGetPatch(EmitContext& ctx, IR::Patch patch);
void EmitSetPatch(EmitContext& ctx, IR::Patch patch, Id value);
void EmitSetFragColor(EmitContext& ctx, u32 index, u32 component, Id value);
void EmitSetFragDepth(EmitContext& ctx, Id value);
void EmitGetZFlag(EmitContext& ctx);
@ -67,6 +69,7 @@ void EmitSetCFlag(EmitContext& ctx);
void EmitSetOFlag(EmitContext& ctx);
Id EmitWorkgroupId(EmitContext& ctx);
Id EmitLocalInvocationId(EmitContext& ctx);
Id EmitInvocationId(EmitContext& ctx);
Id EmitIsHelperInvocation(EmitContext& ctx);
Id EmitLoadLocal(EmitContext& ctx, Id word_offset);
void EmitWriteLocal(EmitContext& ctx, Id word_offset, Id value);

88
src/shader_recompiler/backend/spirv/emit_spirv_context_get_set.cpp
View file

@ -32,13 +32,26 @@ std::optional<AttrInfo> AttrTypes(EmitContext& ctx, u32 index) {
template <typename... Args>
Id AttrPointer(EmitContext& ctx, Id pointer_type, Id vertex, Id base, Args&&... args) {
if (ctx.stage == Stage::Geometry) {
switch (ctx.stage) {
case Stage::TessellationControl:
case Stage::TessellationEval:
case Stage::Geometry:
return ctx.OpAccessChain(pointer_type, base, vertex, std::forward<Args>(args)...);
} else {
default:
return ctx.OpAccessChain(pointer_type, base, std::forward<Args>(args)...);
}
}
template <typename... Args>
Id OutputAccessChain(EmitContext& ctx, Id result_type, Id base, Args&&... args) {
if (ctx.stage == Stage::TessellationControl) {
const Id invocation_id{ctx.OpLoad(ctx.U32[1], ctx.invocation_id)};
return ctx.OpAccessChain(result_type, base, invocation_id, std::forward<Args>(args)...);
} else {
return ctx.OpAccessChain(result_type, base, std::forward<Args>(args)...);
}
}
std::optional<Id> OutputAttrPointer(EmitContext& ctx, IR::Attribute attr) {
if (IR::IsGeneric(attr)) {
const u32 index{IR::GenericAttributeIndex(attr)};
@ -49,7 +62,7 @@ std::optional<Id> OutputAttrPointer(EmitContext& ctx, IR::Attribute attr) {
} 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);
return OutputAccessChain(ctx, ctx.output_f32, info.id, index_id);
}
}
switch (attr) {
@ -61,7 +74,7 @@ std::optional<Id> OutputAttrPointer(EmitContext& ctx, IR::Attribute attr) {
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);
return OutputAccessChain(ctx, ctx.output_f32, ctx.output_position, element_id);
}
case IR::Attribute::ClipDistance0:
case IR::Attribute::ClipDistance1:
@ -74,7 +87,7 @@ std::optional<Id> OutputAttrPointer(EmitContext& ctx, IR::Attribute attr) {
const u32 base{static_cast<u32>(IR::Attribute::ClipDistance0)};
const u32 index{static_cast<u32>(attr) - base};
const Id clip_num{ctx.Constant(ctx.U32[1], index)};
return ctx.OpAccessChain(ctx.output_f32, ctx.clip_distances, clip_num);
return OutputAccessChain(ctx, ctx.output_f32, ctx.clip_distances, clip_num);
}
case IR::Attribute::Layer:
return ctx.profile.support_viewport_index_layer_non_geometry ||
@ -222,11 +235,18 @@ Id EmitGetAttribute(EmitContext& ctx, IR::Attribute attr, Id vertex) {
ctx.Constant(ctx.U32[1], std::numeric_limits<u32>::max()),
ctx.u32_zero_value);
case IR::Attribute::PointSpriteS:
return ctx.OpLoad(ctx.F32[1], AttrPointer(ctx, ctx.input_f32, vertex, ctx.point_coord,
ctx.u32_zero_value));
return ctx.OpLoad(ctx.F32[1],
ctx.OpAccessChain(ctx.input_f32, ctx.point_coord, ctx.u32_zero_value));
case IR::Attribute::PointSpriteT:
return ctx.OpLoad(ctx.F32[1], AttrPointer(ctx, ctx.input_f32, vertex, ctx.point_coord,
ctx.Constant(ctx.U32[1], 1U)));
return ctx.OpLoad(ctx.F32[1], ctx.OpAccessChain(ctx.input_f32, ctx.point_coord,
ctx.Constant(ctx.U32[1], 1U)));
case IR::Attribute::TessellationEvaluationPointU:
return ctx.OpLoad(ctx.F32[1],
ctx.OpAccessChain(ctx.input_f32, ctx.tess_coord, ctx.u32_zero_value));
case IR::Attribute::TessellationEvaluationPointV:
return ctx.OpLoad(ctx.F32[1], ctx.OpAccessChain(ctx.input_f32, ctx.tess_coord,
ctx.Constant(ctx.U32[1], 1U)));
default:
throw NotImplementedException("Read attribute {}", attr);
}
@ -240,9 +260,12 @@ void EmitSetAttribute(EmitContext& ctx, IR::Attribute attr, Id value, [[maybe_un
}
Id EmitGetAttributeIndexed(EmitContext& ctx, Id offset, Id vertex) {
if (ctx.stage == Stage::Geometry) {
switch (ctx.stage) {
case Stage::TessellationControl:
case Stage::TessellationEval:
case Stage::Geometry:
return ctx.OpFunctionCall(ctx.F32[1], ctx.indexed_load_func, offset, vertex);
} else {
default:
return ctx.OpFunctionCall(ctx.F32[1], ctx.indexed_load_func, offset);
}
}
@ -251,6 +274,45 @@ void EmitSetAttributeIndexed(EmitContext& ctx, Id offset, Id value, [[maybe_unus
ctx.OpFunctionCall(ctx.void_id, ctx.indexed_store_func, offset, value);
}
Id EmitGetPatch(EmitContext& ctx, IR::Patch patch) {
if (!IR::IsGeneric(patch)) {
throw NotImplementedException("Non-generic patch load");
}
const u32 index{IR::GenericPatchIndex(patch)};
const Id element{ctx.Constant(ctx.U32[1], IR::GenericPatchElement(patch))};
const Id pointer{ctx.OpAccessChain(ctx.input_f32, ctx.patches.at(index), element)};
return ctx.OpLoad(ctx.F32[1], pointer);
}
void EmitSetPatch(EmitContext& ctx, IR::Patch patch, Id value) {
const Id pointer{[&] {
if (IR::IsGeneric(patch)) {
const u32 index{IR::GenericPatchIndex(patch)};
const Id element{ctx.Constant(ctx.U32[1], IR::GenericPatchElement(patch))};
return ctx.OpAccessChain(ctx.output_f32, ctx.patches.at(index), element);
}
switch (patch) {
case IR::Patch::TessellationLodLeft:
case IR::Patch::TessellationLodRight:
case IR::Patch::TessellationLodTop:
case IR::Patch::TessellationLodBottom: {
const u32 index{static_cast<u32>(patch) - u32(IR::Patch::TessellationLodLeft)};
const Id index_id{ctx.Constant(ctx.U32[1], index)};
return ctx.OpAccessChain(ctx.output_f32, ctx.output_tess_level_outer, index_id);
}
case IR::Patch::TessellationLodInteriorU:
return ctx.OpAccessChain(ctx.output_f32, ctx.output_tess_level_inner,
ctx.u32_zero_value);
case IR::Patch::TessellationLodInteriorV:
return ctx.OpAccessChain(ctx.output_f32, ctx.output_tess_level_inner,
ctx.Constant(ctx.U32[1], 1u));
default:
throw NotImplementedException("Patch {}", patch);
}
}()};
ctx.OpStore(pointer, value);
}
void EmitSetFragColor(EmitContext& ctx, u32 index, u32 component, Id value) {
const Id component_id{ctx.Constant(ctx.U32[1], component)};
const Id pointer{ctx.OpAccessChain(ctx.output_f32, ctx.frag_color.at(index), component_id)};
@ -301,6 +363,10 @@ Id EmitLocalInvocationId(EmitContext& ctx) {
return ctx.OpLoad(ctx.U32[3], ctx.local_invocation_id);
}
Id EmitInvocationId(EmitContext& ctx) {
return ctx.OpLoad(ctx.U32[1], ctx.invocation_id);
}
Id EmitIsHelperInvocation(EmitContext& ctx) {
return ctx.OpLoad(ctx.U1, ctx.is_helper_invocation);
}