From 63709d7d298968d62c754c5f6a114316de3bec61 Mon Sep 17 00:00:00 2001
From: Alexey 'Cluster' Avdyukhin <clusterrr@clusterrr.com>
Date: Thu, 27 Oct 2022 17:40:26 +0400
Subject: Crop overflow check.

---
 NesTiler/FastBitmap.cs | 2 ++
 NesTiler/Program.cs    | 2 +-
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/NesTiler/FastBitmap.cs b/NesTiler/FastBitmap.cs
index fb92468..5910f43 100644
--- a/NesTiler/FastBitmap.cs
+++ b/NesTiler/FastBitmap.cs
@@ -1,4 +1,5 @@
 using SkiaSharp;
+using System;
 using System.Collections.Generic;
 using System.Drawing;
 using System.Linq;
@@ -17,6 +18,7 @@ namespace com.clusterrr.Famicom.NesTiler
         {
             Width = skBitmap.Width;
             Height = height <= 0 ? skBitmap.Height - verticalOffset : height;
+            if (skBitmap.Height - verticalOffset - Height <= 0) throw new InvalidOperationException("Invalid image height.");
             var pixels = skBitmap.Pixels;
             colors = skBitmap.Pixels.Skip(verticalOffset * Width).Take(Width * Height).Select(p => Color.FromArgb(p.Alpha, p.Red, p.Green, p.Blue)).ToArray();
         }
diff --git a/NesTiler/Program.cs b/NesTiler/Program.cs
index 09e6519..852cbc1 100644
--- a/NesTiler/Program.cs
+++ b/NesTiler/Program.cs
@@ -225,7 +225,7 @@ namespace com.clusterrr.Famicom.NesTiler
 
                 if (calculatedPalettes.Count > maxCalculatedPaletteCount && !c.Lossy)
                 {
-                    throw new ArgumentOutOfRangeException($"Can't fit {calculatedPalettes.Count} palettes, {maxCalculatedPaletteCount} is maximum.");
+                    throw new InvalidOperationException($"Can't fit {calculatedPalettes.Count} palettes, {maxCalculatedPaletteCount} is maximum.");
                 }
 
                 // Select palettes
-- 
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