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glsl: Implement geometry shaders

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This commit is contained in:
ameerj
2021-05-31 13:28:53 -04:00
parent df53046d68
commit 19247ba4fa
4 changed files with 62 additions and 9 deletions
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50
src/shader_recompiler/backend/glsl/emit_context.cpp
View File

@@ -21,6 +21,15 @@ std::string_view InterpDecorator(Interpolation interp) {
throw InvalidArgument("Invalid interpolation {}", interp);
}
std::string_view ArrayDecorator(Stage stage) {
switch (stage) {
case Stage::Geometry:
return "[1]";
default:
return "";
}
}
std::string_view SamplerType(TextureType type, bool is_depth) {
if (is_depth) {
switch (type) {
@@ -64,6 +73,33 @@ std::string_view SamplerType(TextureType type, bool is_depth) {
}
}
std::string_view InputPrimitive(InputTopology topology) {
switch (topology) {
case InputTopology::Points:
return "points";
case InputTopology::Lines:
return "lines";
case InputTopology::LinesAdjacency:
return "lines_adjacency";
case InputTopology::Triangles:
return "triangles";
case InputTopology::TrianglesAdjacency:
return "triangles_adjacency";
}
throw InvalidArgument("Invalid input topology {}", topology);
}
std::string_view OutputPrimitive(OutputTopology topology) {
switch (topology) {
case OutputTopology::PointList:
return "points";
case OutputTopology::LineStrip:
return "line_strip";
case OutputTopology::TriangleStrip:
return "triangle_strip";
}
throw InvalidArgument("Invalid output topology {}", topology);
}
} // namespace
EmitContext::EmitContext(IR::Program& program, Bindings& bindings, const Profile& profile_,
@@ -85,6 +121,9 @@ EmitContext::EmitContext(IR::Program& program, Bindings& bindings, const Profile
break;
case Stage::Geometry:
stage_name = "gs";
header += fmt::format("layout({})in;layout({}, max_vertices={})out;\n",
InputPrimitive(runtime_info.input_topology),
OutputPrimitive(program.output_topology), program.output_vertices);
break;
case Stage::Fragment:
stage_name = "fs";
@@ -99,8 +138,9 @@ EmitContext::EmitContext(IR::Program& program, Bindings& bindings, const Profile
for (size_t index = 0; index < info.input_generics.size(); ++index) {
const auto& generic{info.input_generics[index]};
if (generic.used) {
header += fmt::format("layout(location={}) {} in vec4 in_attr{};", index,
InterpDecorator(generic.interpolation), index);
header +=
fmt::format("layout(location={}){} in vec4 in_attr{}{};", index,
InterpDecorator(generic.interpolation), index, ArrayDecorator(stage));
}
}
for (size_t index = 0; index < info.stores_frag_color.size(); ++index) {
@@ -126,8 +166,6 @@ EmitContext::EmitContext(IR::Program& program, Bindings& bindings, const Profile
void EmitContext::SetupExtensions(std::string&) {
// TODO: track this usage
header += "#extension GL_ARB_sparse_texture2 : enable\n";
header += "#extension GL_ARB_shader_viewport_layer_array : enable\n";
header += "#extension GL_NV_viewport_array2 : enable\n";
header += "#extension GL_EXT_texture_shadow_lod : enable\n";
if (info.uses_int64) {
header += "#extension GL_ARB_gpu_shader_int64 : enable\n";
@@ -157,6 +195,10 @@ void EmitContext::SetupExtensions(std::string&) {
header += "#extension GL_ARB_gpu_shader_int64 : enable\n";
}
}
if (info.stores_viewport_index) {
header += "#extension GL_ARB_shader_viewport_layer_array : enable\n";
header += "#extension GL_NV_viewport_array2 : enable\n";
}
}
void EmitContext::DefineConstantBuffers(Bindings& bindings) {

2
src/shader_recompiler/backend/glsl/emit_glsl.cpp
View File

@@ -162,7 +162,7 @@ void EmitCode(EmitContext& ctx, const IR::Program& program) {
break;
default:
fmt::print("{}", node.type);
throw NotImplementedException("{}", node.type);
throw NotImplementedException("AbstractSyntaxNode::Type {}", node.type);
break;
}
}

15
src/shader_recompiler/backend/glsl/emit_glsl_context_get_set.cpp
View File

@@ -19,6 +19,15 @@ u32 CbufIndex(u32 offset) {
char OffsetSwizzle(u32 offset) {
return SWIZZLE[CbufIndex(offset)];
}
bool IsInputArray(Stage stage) {
return stage == Stage::Geometry || stage == Stage::TessellationControl ||
stage == Stage::TessellationEval;
}
std::string VertexIndex(EmitContext& ctx, std::string_view vertex) {
return IsInputArray(ctx.stage) ? fmt::format("[{}]", vertex) : "";
}
} // namespace
void EmitGetCbufU8([[maybe_unused]] EmitContext& ctx, [[maybe_unused]] IR::Inst& inst,
@@ -128,7 +137,7 @@ void EmitGetAttribute(EmitContext& ctx, IR::Inst& inst, IR::Attribute attr,
const char swizzle{"xyzw"[element]};
if (IR::IsGeneric(attr)) {
const u32 index{IR::GenericAttributeIndex(attr)};
ctx.AddF32("{}=in_attr{}.{};", inst, index, swizzle);
ctx.AddF32("{}=in_attr{}{}.{};", inst, index, VertexIndex(ctx, vertex), swizzle);
return;
}
switch (attr) {
@@ -139,9 +148,11 @@ void EmitGetAttribute(EmitContext& ctx, IR::Inst& inst, IR::Attribute attr,
switch (ctx.stage) {
case Stage::VertexA:
case Stage::VertexB:
case Stage::Geometry:
ctx.AddF32("{}=gl_Position.{};", inst, swizzle);
break;
case Stage::Geometry:
ctx.AddF32("{}=gl_in[{}].gl_Position.{};", inst, vertex, swizzle);
break;
case Stage::Fragment:
ctx.AddF32("{}=gl_FragCoord.{};", inst, swizzle);
break;

4
src/shader_recompiler/backend/glsl/emit_glsl_not_implemented.cpp
View File

@@ -103,11 +103,11 @@ void EmitEpilogue(EmitContext& ctx) {
}
void EmitEmitVertex(EmitContext& ctx, const IR::Value& stream) {
NotImplemented();
ctx.Add("EmitStreamVertex(int({}));", ctx.var_alloc.Consume(stream));
}
void EmitEndPrimitive(EmitContext& ctx, const IR::Value& stream) {
NotImplemented();
ctx.Add("EndStreamPrimitive(int({}));", ctx.var_alloc.Consume(stream));
}
void EmitGetRegister(EmitContext& ctx) {