glsl: Implement geometry shaders
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df53046d68
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19247ba4fa
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@ -21,6 +21,15 @@ std::string_view InterpDecorator(Interpolation interp) {
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throw InvalidArgument("Invalid interpolation {}", interp);
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}
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std::string_view ArrayDecorator(Stage stage) {
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switch (stage) {
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case Stage::Geometry:
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return "[1]";
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default:
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return "";
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}
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}
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std::string_view SamplerType(TextureType type, bool is_depth) {
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if (is_depth) {
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switch (type) {
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@ -64,6 +73,33 @@ std::string_view SamplerType(TextureType type, bool is_depth) {
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}
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}
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std::string_view InputPrimitive(InputTopology topology) {
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switch (topology) {
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case InputTopology::Points:
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return "points";
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case InputTopology::Lines:
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return "lines";
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case InputTopology::LinesAdjacency:
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return "lines_adjacency";
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case InputTopology::Triangles:
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return "triangles";
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case InputTopology::TrianglesAdjacency:
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return "triangles_adjacency";
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}
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throw InvalidArgument("Invalid input topology {}", topology);
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}
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std::string_view OutputPrimitive(OutputTopology topology) {
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switch (topology) {
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case OutputTopology::PointList:
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return "points";
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case OutputTopology::LineStrip:
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return "line_strip";
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case OutputTopology::TriangleStrip:
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return "triangle_strip";
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}
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throw InvalidArgument("Invalid output topology {}", topology);
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}
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} // namespace
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EmitContext::EmitContext(IR::Program& program, Bindings& bindings, const Profile& profile_,
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@ -85,6 +121,9 @@ EmitContext::EmitContext(IR::Program& program, Bindings& bindings, const Profile
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break;
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case Stage::Geometry:
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stage_name = "gs";
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header += fmt::format("layout({})in;layout({}, max_vertices={})out;\n",
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InputPrimitive(runtime_info.input_topology),
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OutputPrimitive(program.output_topology), program.output_vertices);
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break;
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case Stage::Fragment:
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stage_name = "fs";
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@ -99,8 +138,9 @@ EmitContext::EmitContext(IR::Program& program, Bindings& bindings, const Profile
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for (size_t index = 0; index < info.input_generics.size(); ++index) {
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const auto& generic{info.input_generics[index]};
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if (generic.used) {
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header += fmt::format("layout(location={}) {} in vec4 in_attr{};", index,
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InterpDecorator(generic.interpolation), index);
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header +=
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fmt::format("layout(location={}){} in vec4 in_attr{}{};", index,
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InterpDecorator(generic.interpolation), index, ArrayDecorator(stage));
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}
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}
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for (size_t index = 0; index < info.stores_frag_color.size(); ++index) {
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@ -126,8 +166,6 @@ EmitContext::EmitContext(IR::Program& program, Bindings& bindings, const Profile
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void EmitContext::SetupExtensions(std::string&) {
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// TODO: track this usage
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header += "#extension GL_ARB_sparse_texture2 : enable\n";
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header += "#extension GL_ARB_shader_viewport_layer_array : enable\n";
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header += "#extension GL_NV_viewport_array2 : enable\n";
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header += "#extension GL_EXT_texture_shadow_lod : enable\n";
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if (info.uses_int64) {
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header += "#extension GL_ARB_gpu_shader_int64 : enable\n";
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@ -157,6 +195,10 @@ void EmitContext::SetupExtensions(std::string&) {
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header += "#extension GL_ARB_gpu_shader_int64 : enable\n";
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}
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}
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if (info.stores_viewport_index) {
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header += "#extension GL_ARB_shader_viewport_layer_array : enable\n";
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header += "#extension GL_NV_viewport_array2 : enable\n";
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}
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}
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void EmitContext::DefineConstantBuffers(Bindings& bindings) {
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@ -162,7 +162,7 @@ void EmitCode(EmitContext& ctx, const IR::Program& program) {
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break;
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default:
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fmt::print("{}", node.type);
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throw NotImplementedException("{}", node.type);
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throw NotImplementedException("AbstractSyntaxNode::Type {}", node.type);
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break;
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}
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}
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@ -19,6 +19,15 @@ u32 CbufIndex(u32 offset) {
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char OffsetSwizzle(u32 offset) {
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return SWIZZLE[CbufIndex(offset)];
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}
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bool IsInputArray(Stage stage) {
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return stage == Stage::Geometry || stage == Stage::TessellationControl ||
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stage == Stage::TessellationEval;
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}
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std::string VertexIndex(EmitContext& ctx, std::string_view vertex) {
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return IsInputArray(ctx.stage) ? fmt::format("[{}]", vertex) : "";
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}
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} // namespace
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void EmitGetCbufU8([[maybe_unused]] EmitContext& ctx, [[maybe_unused]] IR::Inst& inst,
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@ -128,7 +137,7 @@ void EmitGetAttribute(EmitContext& ctx, IR::Inst& inst, IR::Attribute attr,
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const char swizzle{"xyzw"[element]};
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if (IR::IsGeneric(attr)) {
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const u32 index{IR::GenericAttributeIndex(attr)};
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ctx.AddF32("{}=in_attr{}.{};", inst, index, swizzle);
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ctx.AddF32("{}=in_attr{}{}.{};", inst, index, VertexIndex(ctx, vertex), swizzle);
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return;
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}
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switch (attr) {
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@ -139,9 +148,11 @@ void EmitGetAttribute(EmitContext& ctx, IR::Inst& inst, IR::Attribute attr,
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switch (ctx.stage) {
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case Stage::VertexA:
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case Stage::VertexB:
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case Stage::Geometry:
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ctx.AddF32("{}=gl_Position.{};", inst, swizzle);
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break;
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case Stage::Geometry:
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ctx.AddF32("{}=gl_in[{}].gl_Position.{};", inst, vertex, swizzle);
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break;
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case Stage::Fragment:
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ctx.AddF32("{}=gl_FragCoord.{};", inst, swizzle);
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break;
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@ -103,11 +103,11 @@ void EmitEpilogue(EmitContext& ctx) {
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}
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void EmitEmitVertex(EmitContext& ctx, const IR::Value& stream) {
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NotImplemented();
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ctx.Add("EmitStreamVertex(int({}));", ctx.var_alloc.Consume(stream));
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}
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void EmitEndPrimitive(EmitContext& ctx, const IR::Value& stream) {
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NotImplemented();
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ctx.Add("EndStreamPrimitive(int({}));", ctx.var_alloc.Consume(stream));
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}
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void EmitGetRegister(EmitContext& ctx) {
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