From 76fdec30ebef505d23c9d71df00ceb95947ee761 Mon Sep 17 00:00:00 2001
From: gdkchan <gab.dark.100@gmail.com>
Date: Sun, 21 Oct 2018 19:56:39 -0300
Subject: [PATCH] Add depth range support on the GPU

---
 Ryujinx.Graphics/Gal/GalPipelineState.cs   | 2 ++
 Ryujinx.Graphics/Gal/OpenGL/OGLPipeline.cs | 8 ++++++++
 Ryujinx.Graphics/NvGpuEngine3d.cs          | 3 +++
 Ryujinx.Graphics/NvGpuEngine3dReg.cs       | 2 ++
 4 files changed, 15 insertions(+)

diff --git a/Ryujinx.Graphics/Gal/GalPipelineState.cs b/Ryujinx.Graphics/Gal/GalPipelineState.cs
index 56b0fbde33..17f52dd6c4 100644
--- a/Ryujinx.Graphics/Gal/GalPipelineState.cs
+++ b/Ryujinx.Graphics/Gal/GalPipelineState.cs
@@ -43,6 +43,8 @@
         public bool DepthTestEnabled;
         public bool DepthWriteEnabled;
         public GalComparisonOp DepthFunc;
+        public float DepthRangeNear;
+        public float DepthRangeFar;
 
         public bool StencilTestEnabled;
         public bool StencilTwoSideEnabled;
diff --git a/Ryujinx.Graphics/Gal/OpenGL/OGLPipeline.cs b/Ryujinx.Graphics/Gal/OpenGL/OGLPipeline.cs
index 00699641fd..170a83c325 100644
--- a/Ryujinx.Graphics/Gal/OpenGL/OGLPipeline.cs
+++ b/Ryujinx.Graphics/Gal/OpenGL/OGLPipeline.cs
@@ -100,6 +100,8 @@ namespace Ryujinx.Graphics.Gal.OpenGL
                 DepthTestEnabled = false,
                 DepthWriteEnabled = true,
                 DepthFunc = GalComparisonOp.Less,
+                DepthRangeNear = 0,
+                DepthRangeFar = 1,
 
                 StencilTestEnabled = false,
 
@@ -195,6 +197,12 @@ namespace Ryujinx.Graphics.Gal.OpenGL
                 }
             }
 
+            if (New.DepthRangeNear != Old.DepthRangeNear ||
+                New.DepthRangeFar  != Old.DepthRangeFar)
+            {
+                GL.DepthRange(New.DepthRangeNear, New.DepthRangeFar);
+            }
+
             if (New.StencilTestEnabled != Old.StencilTestEnabled)
             {
                 Enable(EnableCap.StencilTest, New.StencilTestEnabled);
diff --git a/Ryujinx.Graphics/NvGpuEngine3d.cs b/Ryujinx.Graphics/NvGpuEngine3d.cs
index fd15d0b6a2..e8ded8898b 100644
--- a/Ryujinx.Graphics/NvGpuEngine3d.cs
+++ b/Ryujinx.Graphics/NvGpuEngine3d.cs
@@ -371,6 +371,9 @@ namespace Ryujinx.Graphics
             {
                 State.DepthFunc = (GalComparisonOp)ReadRegister(NvGpuEngine3dReg.DepthTestFunction);
             }
+
+            State.DepthRangeNear = ReadRegisterFloat(NvGpuEngine3dReg.DepthRangeNNear);
+            State.DepthRangeFar  = ReadRegisterFloat(NvGpuEngine3dReg.DepthRangeNFar);
         }
 
         private void SetStencil(GalPipelineState State)
diff --git a/Ryujinx.Graphics/NvGpuEngine3dReg.cs b/Ryujinx.Graphics/NvGpuEngine3dReg.cs
index ef74e4f675..6ea2265423 100644
--- a/Ryujinx.Graphics/NvGpuEngine3dReg.cs
+++ b/Ryujinx.Graphics/NvGpuEngine3dReg.cs
@@ -15,6 +15,8 @@ namespace Ryujinx.Graphics
         ViewportNTranslateZ  = 0x285,
         ViewportNHoriz       = 0x300,
         ViewportNVert        = 0x301,
+        DepthRangeNNear      = 0x302,
+        DepthRangeNFar       = 0x303,
         VertexArrayFirst     = 0x35d,
         VertexArrayCount     = 0x35e,
         ClearNColor          = 0x360,