From ba5d791a32a572b6bf2c6ed59f595c300c5fc584 Mon Sep 17 00:00:00 2001
From: Marcus Ramse <marcus@ramse.se>
Date: Mon, 13 May 2024 13:26:18 +0000
Subject: [PATCH] sim: fix rect boundscheck

---
 simulator/src/framebuffer.ts | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/simulator/src/framebuffer.ts b/simulator/src/framebuffer.ts
index a6c68dc..3eaa169 100644
--- a/simulator/src/framebuffer.ts
+++ b/simulator/src/framebuffer.ts
@@ -72,8 +72,8 @@ export class Framebuffer {
         const startY = Math.max(0, y);
         const endXUnclamped = x + width;
         const endYUnclamped = y + height;
-        const endX = Math.min(endXUnclamped, WIDTH);
-        const endY = Math.min(endYUnclamped, HEIGHT);
+        const endX = Math.max(0, Math.min(endXUnclamped, WIDTH));
+        const endY = Math.max(0, Math.min(endYUnclamped, HEIGHT));
 
         if (fillColor !== OPTIONAL_COLOR_NONE) {
             for (let yy = startY; yy < endY; ++yy) {