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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
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@ -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) {