From 47378716ab03d6b39ee959c949df551c643942f1 Mon Sep 17 00:00:00 2001
From: Peter Szabo <pts@fazekas.hu>
Date: Tue, 27 Feb 2018 15:13:02 +0100
Subject: [PATCH] bugfix: added error reporting on invalid BMP bpp value; this
 fixes https://github.com/pts/sam2p/issues/21

---
 input-bmp.ci | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/input-bmp.ci b/input-bmp.ci
index 61bc56d..48fd5f6 100644
--- a/input-bmp.ci
+++ b/input-bmp.ci
@@ -172,6 +172,12 @@ bitmap_type bmp_load_image (at_string filename)
 
   if (Maps != 3 && Maps != 4) FATALP("BMP: Bad color_size.");
 
+  switch (Bitmap_Head.biBitCnt) {
+   case 32: case 24: case 16: case 8: case 4: case 2: case 1: break;
+   default:
+    FATALP ("BMP: Invalid bpp.");
+  }
+
   /* Valid options 1, 4, 8, 16, 24, 32 */
   /* 16 is awful, we should probably shoot whoever invented it */