From 28a20218d29c1b7f1a49a22d7e3d7540f51d623a Mon Sep 17 00:00:00 2001
From: Luke Krasnoff <luke.krasnoff@gmail.com>
Date: Sat, 20 Nov 2021 12:32:21 +1030
Subject: [PATCH] Fix BeginScissorMode for high DPI. Add comment to set
 FLAG_WINDOW_HIGHDPI flag.

---
 examples/core/core_scissor_test.c | 3 +++
 src/rcore.c                       | 3 ++-
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/examples/core/core_scissor_test.c b/examples/core/core_scissor_test.c
index 56eb84f80..278deec51 100644
--- a/examples/core/core_scissor_test.c
+++ b/examples/core/core_scissor_test.c
@@ -20,6 +20,9 @@ int main(void)
     const int screenWidth = 800;
     const int screenHeight = 450;
 
+    // If you have a high DPI screen you'll have to set the High DPI flag.
+    // SetConfigFlags(FLAG_WINDOW_HIGHDPI);
+
     InitWindow(screenWidth, screenHeight, "raylib [core] example - scissor test");
 
     Rectangle scissorArea = { 0, 0, 300, 300 };
diff --git a/src/rcore.c b/src/rcore.c
index ec1601ca1..3b573a928 100644
--- a/src/rcore.c
+++ b/src/rcore.c
@@ -2188,7 +2188,8 @@ void BeginScissorMode(int x, int y, int width, int height)
     {
         Vector2 scale = GetWindowScaleDPI();
 
-        rlScissor((int)(x*scale.x), (int)(CORE.Window.currentFbo.height - (y + height)*scale.y), (int)(width*scale.x), (int)(height*scale.y));
+        rlScissor((int)(x*scale.x), (int)(CORE.Window.currentFbo.height - y*scale.y - height/scale.y),
+                  (int)(width*scale.x), (int)(height*scale.y));
     }
     else
     {