From 0bbe8c54cd9dcd0b78bd17092dabe78235500bfc Mon Sep 17 00:00:00 2001
From: Jannik Vogel <email@jannikvogel.de>
Date: Mon, 14 Mar 2016 15:38:16 +0100
Subject: [PATCH] SWRasterizer: Don't draw outside of framebuffer

---
 src/video_core/rasterizer.cpp | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/video_core/rasterizer.cpp b/src/video_core/rasterizer.cpp
index fd02aa652..6a335483e 100644
--- a/src/video_core/rasterizer.cpp
+++ b/src/video_core/rasterizer.cpp
@@ -380,6 +380,12 @@ static void ProcessTriangleInternal(const Shader::OutputVertex& v0,
     for (u16 y = min_y + 8; y < max_y; y += 0x10) {
         for (u16 x = min_x + 8; x < max_x; x += 0x10) {
 
+            // Don't draw pixels outside of framebuffer
+            // framebuffer.height is actually "framebuffer height - 1"
+            const auto& framebuffer = g_state.regs.framebuffer;
+            if (x >> 4 >= framebuffer.width || y >> 4 > framebuffer.height)
+                continue;
+
             // Calculate the barycentric coordinates w0, w1 and w2
             int w0 = bias0 + SignedArea(vtxpos[1].xy(), vtxpos[2].xy(), {x, y});
             int w1 = bias1 + SignedArea(vtxpos[2].xy(), vtxpos[0].xy(), {x, y});