From 3142f1b597436d0bd1de12c1769da897976c6b32 Mon Sep 17 00:00:00 2001
From: ReinUsesLisp <reinuseslisp@airmail.cc>
Date: Mon, 6 Jan 2020 21:11:23 -0300
Subject: fixed_pipeline_state: Add depth clamp

---
 .../renderer_vulkan/fixed_pipeline_state.cpp           | 18 ++++++++++++------
 src/video_core/renderer_vulkan/fixed_pipeline_state.h  | 10 ++++++----
 2 files changed, 18 insertions(+), 10 deletions(-)

(limited to 'src/video_core/renderer_vulkan')

diff --git a/src/video_core/renderer_vulkan/fixed_pipeline_state.cpp b/src/video_core/renderer_vulkan/fixed_pipeline_state.cpp
index 5a490f6ef..4e3ff231e 100644
--- a/src/video_core/renderer_vulkan/fixed_pipeline_state.cpp
+++ b/src/video_core/renderer_vulkan/fixed_pipeline_state.cpp
@@ -109,6 +109,9 @@ constexpr FixedPipelineState::Rasterizer GetRasterizerState(const Maxwell& regs)
     const auto topology = static_cast<std::size_t>(regs.draw.topology.Value());
     const bool depth_bias_enabled = enabled_lut[PolygonOffsetEnableLUT[topology]];
 
+    const auto& clip = regs.view_volume_clip_control;
+    const bool depth_clamp_enabled = clip.depth_clamp_near == 1 || clip.depth_clamp_far == 1;
+
     Maxwell::Cull::FrontFace front_face = regs.cull.front_face;
     if (regs.screen_y_control.triangle_rast_flip != 0 &&
         regs.viewport_transform[0].scale_y > 0.0f) {
@@ -119,8 +122,9 @@ constexpr FixedPipelineState::Rasterizer GetRasterizerState(const Maxwell& regs)
     }
 
     const bool gl_ndc = regs.depth_mode == Maxwell::DepthMode::MinusOneToOne;
-    return FixedPipelineState::Rasterizer(regs.cull.enabled, depth_bias_enabled, gl_ndc,
-                                          regs.cull.cull_face, front_face);
+    return FixedPipelineState::Rasterizer(regs.cull.enabled, depth_bias_enabled,
+                                          depth_clamp_enabled, gl_ndc, regs.cull.cull_face,
+                                          front_face);
 }
 
 } // Anonymous namespace
@@ -222,15 +226,17 @@ bool FixedPipelineState::Tessellation::operator==(const Tessellation& rhs) const
 std::size_t FixedPipelineState::Rasterizer::Hash() const noexcept {
     return static_cast<std::size_t>(cull_enable) ^
            (static_cast<std::size_t>(depth_bias_enable) << 1) ^
-           (static_cast<std::size_t>(ndc_minus_one_to_one) << 2) ^
+           (static_cast<std::size_t>(depth_clamp_enable) << 2) ^
+           (static_cast<std::size_t>(ndc_minus_one_to_one) << 3) ^
            (static_cast<std::size_t>(cull_face) << 24) ^
            (static_cast<std::size_t>(front_face) << 48);
 }
 
 bool FixedPipelineState::Rasterizer::operator==(const Rasterizer& rhs) const noexcept {
-    return std::tie(cull_enable, depth_bias_enable, ndc_minus_one_to_one, cull_face, front_face) ==
-           std::tie(rhs.cull_enable, rhs.depth_bias_enable, rhs.ndc_minus_one_to_one, rhs.cull_face,
-                    rhs.front_face);
+    return std::tie(cull_enable, depth_bias_enable, depth_clamp_enable, ndc_minus_one_to_one,
+                    cull_face, front_face) ==
+           std::tie(rhs.cull_enable, rhs.depth_bias_enable, rhs.depth_clamp_enable,
+                    rhs.ndc_minus_one_to_one, rhs.cull_face, rhs.front_face);
 }
 
 std::size_t FixedPipelineState::DepthStencil::Hash() const noexcept {
diff --git a/src/video_core/renderer_vulkan/fixed_pipeline_state.h b/src/video_core/renderer_vulkan/fixed_pipeline_state.h
index 04152c0d4..87056ef37 100644
--- a/src/video_core/renderer_vulkan/fixed_pipeline_state.h
+++ b/src/video_core/renderer_vulkan/fixed_pipeline_state.h
@@ -170,15 +170,17 @@ struct FixedPipelineState {
     };
 
     struct Rasterizer {
-        constexpr Rasterizer(bool cull_enable, bool depth_bias_enable, bool ndc_minus_one_to_one,
-                             Maxwell::Cull::CullFace cull_face, Maxwell::Cull::FrontFace front_face)
+        constexpr Rasterizer(bool cull_enable, bool depth_bias_enable, bool depth_clamp_enable,
+                             bool ndc_minus_one_to_one, Maxwell::Cull::CullFace cull_face,
+                             Maxwell::Cull::FrontFace front_face)
             : cull_enable{cull_enable}, depth_bias_enable{depth_bias_enable},
-              ndc_minus_one_to_one{ndc_minus_one_to_one}, cull_face{cull_face}, front_face{
-                                                                                    front_face} {}
+              depth_clamp_enable{depth_clamp_enable}, ndc_minus_one_to_one{ndc_minus_one_to_one},
+              cull_face{cull_face}, front_face{front_face} {}
         Rasterizer() = default;
 
         bool cull_enable;
         bool depth_bias_enable;
+        bool depth_clamp_enable;
         bool ndc_minus_one_to_one;
         Maxwell::Cull::CullFace cull_face;
         Maxwell::Cull::FrontFace front_face;
-- 
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