From f263760c5a3aff771123b32b15677e1f7a089640 Mon Sep 17 00:00:00 2001
From: ReinUsesLisp <reinuseslisp@airmail.cc>
Date: Mon, 12 Apr 2021 19:41:22 -0300
Subject: shader: Implement geometry shaders

---
 .../renderer_vulkan/vk_pipeline_cache.cpp          | 56 +++++++++++++++++++---
 src/video_core/renderer_vulkan/vk_pipeline_cache.h |  7 ++-
 2 files changed, 56 insertions(+), 7 deletions(-)

(limited to 'src/video_core')

diff --git a/src/video_core/renderer_vulkan/vk_pipeline_cache.cpp b/src/video_core/renderer_vulkan/vk_pipeline_cache.cpp
index b953d694b..f49add208 100644
--- a/src/video_core/renderer_vulkan/vk_pipeline_cache.cpp
+++ b/src/video_core/renderer_vulkan/vk_pipeline_cache.cpp
@@ -769,7 +769,7 @@ std::unique_ptr<GraphicsPipeline> PipelineCache::CreateGraphicsPipeline(
         const size_t stage_index{index - 1};
         infos[stage_index] = &program.info;
 
-        const Shader::Profile profile{MakeProfile(key, program.stage)};
+        const Shader::Profile profile{MakeProfile(key, program)};
         const std::vector<u32> code{EmitSPIRV(profile, program, binding)};
         device.SaveShader(code);
         modules[stage_index] = BuildShader(device, code);
@@ -880,15 +880,59 @@ static Shader::AttributeType CastAttributeType(const FixedPipelineState::VertexA
 }
 
 Shader::Profile PipelineCache::MakeProfile(const GraphicsPipelineCacheKey& key,
-                                           Shader::Stage stage) {
+                                           const Shader::IR::Program& program) {
     Shader::Profile profile{base_profile};
-    if (stage == Shader::Stage::VertexB) {
-        profile.convert_depth_mode = key.state.ndc_minus_one_to_one != 0;
-        if (key.state.topology == Maxwell::PrimitiveTopology::Points) {
-            profile.fixed_state_point_size = Common::BitCast<float>(key.state.point_size);
+
+    const Shader::Stage stage{program.stage};
+    const bool has_geometry{key.unique_hashes[4] != u128{}};
+    const bool gl_ndc{key.state.ndc_minus_one_to_one != 0};
+    const float point_size{Common::BitCast<float>(key.state.point_size)};
+    switch (stage) {
+    case Shader::Stage::VertexB:
+        if (!has_geometry) {
+            if (key.state.topology == Maxwell::PrimitiveTopology::Points) {
+                profile.fixed_state_point_size = point_size;
+            }
+            profile.convert_depth_mode = gl_ndc;
         }
         std::ranges::transform(key.state.attributes, profile.generic_input_types.begin(),
                                &CastAttributeType);
+        break;
+    case Shader::Stage::Geometry:
+        if (program.output_topology == Shader::OutputTopology::PointList) {
+            profile.fixed_state_point_size = point_size;
+        }
+        profile.convert_depth_mode = gl_ndc;
+        break;
+    default:
+        break;
+    }
+    switch (key.state.topology) {
+    case Maxwell::PrimitiveTopology::Points:
+        profile.input_topology = Shader::InputTopology::Points;
+        break;
+    case Maxwell::PrimitiveTopology::Lines:
+    case Maxwell::PrimitiveTopology::LineLoop:
+    case Maxwell::PrimitiveTopology::LineStrip:
+        profile.input_topology = Shader::InputTopology::Lines;
+        break;
+    case Maxwell::PrimitiveTopology::Triangles:
+    case Maxwell::PrimitiveTopology::TriangleStrip:
+    case Maxwell::PrimitiveTopology::TriangleFan:
+    case Maxwell::PrimitiveTopology::Quads:
+    case Maxwell::PrimitiveTopology::QuadStrip:
+    case Maxwell::PrimitiveTopology::Polygon:
+    case Maxwell::PrimitiveTopology::Patches:
+        profile.input_topology = Shader::InputTopology::Triangles;
+        break;
+    case Maxwell::PrimitiveTopology::LinesAdjacency:
+    case Maxwell::PrimitiveTopology::LineStripAdjacency:
+        profile.input_topology = Shader::InputTopology::LinesAdjacency;
+        break;
+    case Maxwell::PrimitiveTopology::TrianglesAdjacency:
+    case Maxwell::PrimitiveTopology::TriangleStripAdjacency:
+        profile.input_topology = Shader::InputTopology::TrianglesAdjacency;
+        break;
     }
     return profile;
 }
diff --git a/src/video_core/renderer_vulkan/vk_pipeline_cache.h b/src/video_core/renderer_vulkan/vk_pipeline_cache.h
index 343ea1554..8b6839966 100644
--- a/src/video_core/renderer_vulkan/vk_pipeline_cache.h
+++ b/src/video_core/renderer_vulkan/vk_pipeline_cache.h
@@ -33,6 +33,10 @@ namespace Core {
 class System;
 }
 
+namespace Shader::IR {
+struct Program;
+}
+
 namespace Vulkan {
 
 using Maxwell = Tegra::Engines::Maxwell3D::Regs;
@@ -160,7 +164,8 @@ private:
                                                            Shader::Environment& env,
                                                            bool build_in_parallel);
 
-    Shader::Profile MakeProfile(const GraphicsPipelineCacheKey& key, Shader::Stage stage);
+    Shader::Profile MakeProfile(const GraphicsPipelineCacheKey& key,
+                                const Shader::IR::Program& program);
 
     Tegra::GPU& gpu;
     Tegra::Engines::Maxwell3D& maxwell3d;
-- 
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