From b84bf176e184db5898ab79a7bcaede4c31c55718 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ricardo=20Lu=C3=ADs=20Vaz=20Silva?= <ricolvs123@gmail.com>
Date: Fri, 17 Feb 2023 16:11:39 -0300
Subject: [PATCH] Fix Software Slope Rendering for non-1.2 pixel ratios

---
 src/rendering/swrenderer/viewport/r_viewport.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/rendering/swrenderer/viewport/r_viewport.cpp b/src/rendering/swrenderer/viewport/r_viewport.cpp
index aa455cf0655..63606d46770 100644
--- a/src/rendering/swrenderer/viewport/r_viewport.cpp
+++ b/src/rendering/swrenderer/viewport/r_viewport.cpp
@@ -172,6 +172,9 @@ namespace swrenderer
 
 		WallTMapScale2 = IYaspectMul / CenterX * 1.2 / ypixelstretch;
 
+		// [RicardoLuis0] adjust IYaspectMul for map stretch -- fixes slope rendering on maps that define pixelratio
+		IYaspectMul *= 1.2 / ypixelstretch;
+
 		// thing clipping
 		fillshort(screenheightarray, viewwidth, (short)viewheight);