SwRasterizer: implement custom clip plane

1 files changed, 13 insertions, 2 deletions

diff --git a/src/video_core/swrasterizer/clipper.cpp b/src/video_core/swrasterizer/clipper.cpp
index cdbc71502..cc76ba555 100644
--- a/src/video_core/swrasterizer/clipper.cpp
+++ b/src/video_core/swrasterizer/clipper.cpp
@@ -127,8 +127,7 @@ void ProcessTriangle(const OutputVertex& v0, const OutputVertex& v1, const Outpu
 
     // Simple implementation of the Sutherland-Hodgman clipping algorithm.
     // TODO: Make this less inefficient (currently lots of useless buffering overhead happens here)
-    for (auto edge : clipping_edges) {
-
+    auto Clip = [&](const ClippingEdge& edge) {
         std::swap(input_list, output_list);
         output_list->clear();
 
@@ -147,12 +146,24 @@ void ProcessTriangle(const OutputVertex& v0, const OutputVertex& v1, const Outpu
             }
             reference_vertex = &vertex;
         }
+    };
+
+    for (auto edge : clipping_edges) {
+        Clip(edge);
 
         // Need to have at least a full triangle to continue...
         if (output_list->size() < 3)
             return;
     }
 
+    if (g_state.regs.rasterizer.clip_enable) {
+        ClippingEdge custom_edge{-g_state.regs.rasterizer.GetClipCoef()};
+        Clip(custom_edge);
+
+        if (output_list->size() < 3)
+            return;
+    }
+
     InitScreenCoordinates((*output_list)[0]);
     InitScreenCoordinates((*output_list)[1]);