Merge pull request #4085 from Armada651/vertex-depth

VideoCommon: Implement depth range equation in vertex shader.

1 files changed, 15 insertions, 0 deletions

diff --git a/Source/Core/VideoCommon/GeometryShaderGen.cpp b/Source/Core/VideoCommon/GeometryShaderGen.cpp
index 4d90e6f10d..83b30943bc 100644
--- a/Source/Core/VideoCommon/GeometryShaderGen.cpp
+++ b/Source/Core/VideoCommon/GeometryShaderGen.cpp
@@ -7,6 +7,7 @@
 
 #include "Common/CommonTypes.h"
 #include "VideoCommon/BPMemory.h"
+#include "VideoCommon/DriverDetails.h"
 #include "VideoCommon/GeometryShaderGen.h"
 #include "VideoCommon/LightingShaderGen.h"
 #include "VideoCommon/VideoCommon.h"
@@ -211,6 +212,15 @@ ShaderCode GenerateGeometryShaderCode(APIType ApiType, const geometry_shader_uid
   {
     out.Write("\tVS_OUTPUT f;\n");
     AssignVSOutputMembers(out, "f", "vs[i]", uid_data->numTexGens, uid_data->pixel_lighting);
+
+    if (g_ActiveConfig.backend_info.bSupportsDepthClamp &&
+        DriverDetails::HasBug(DriverDetails::BUG_BROKENCLIPDISTANCE))
+    {
+      // On certain GPUs we have to consume the clip distance from the vertex shader
+      // or else the other vertex shader outputs will get corrupted.
+      out.Write("\tf.clipDist0 = gl_in[i].gl_ClipDistance[0];\n");
+      out.Write("\tf.clipDist1 = gl_in[i].gl_ClipDistance[1];\n");
+    }
   }
   else
   {
@@ -312,6 +322,11 @@ static void EmitVertex(ShaderCode& out, const geometry_shader_uid_data* uid_data
   if (ApiType == APIType::OpenGL)
   {
     out.Write("\tgl_Position = %s.pos;\n", vertex);
+    if (g_ActiveConfig.backend_info.bSupportsDepthClamp)
+    {
+      out.Write("\tgl_ClipDistance[0] = %s.clipDist0;\n", vertex);
+      out.Write("\tgl_ClipDistance[1] = %s.clipDist1;\n", vertex);
+    }
     AssignVSOutputMembers(out, "ps", vertex, uid_data->numTexGens, uid_data->pixel_lighting);
   }
   else