test Convert_24b_bitmap_to_256()

src/tests/testlist.h

@@ -4,3 +4,4 @@
 TEST(MOTO_MAP_pack)
 TEST(CPC_compare_colors)
 TEST(Packbits)
+TEST(Convert_24b_bitmap_to_256)

src/tests/testop_c.c

@@ -0,0 +1,60 @@
+/* vim:expandtab:ts=2 sw=2:
+*/
+/*  Grafx2 - The Ultimate 256-color bitmap paint program
+
+    Copyright 2018-2019 Thomas Bernard
+    Copyright 2011 Pawel Góralski
+    Copyright 2009 Petter Lindquist
+    Copyright 2008 Yves Rizoud
+    Copyright 2008 Franck Charlet
+    Copyright 2007-2011 Adrien Destugues
+    Copyright 1996-2001 Sunset Design (Guillaume Dorme & Karl Maritaud)
+
+    Grafx2 is free software; you can redistribute it and/or
+    modify it under the terms of the GNU General Public License
+    as published by the Free Software Foundation; version 2
+    of the License.
+
+    Grafx2 is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with Grafx2; if not, see <http://www.gnu.org/licenses/>
+*/
+///@file testop_c.c
+/// Unit tests.
+///
+#include <stdio.h>
+#include <string.h>
+#include "../op_c.h"
+#include "../gfx2log.h"
+
+int Test_Convert_24b_bitmap_to_256(void)
+{
+  T_Palette palette;
+  byte dest[256];
+  T_Components source[256];
+  int i;
+
+  // first try if a 256 colors picture is converted OK
+  for (i = 0; i < 256; i++)
+  {
+    source[i].R = i;
+    source[i].G = i;
+    source[i].B = i;
+  }
+  if (Convert_24b_bitmap_to_256(dest, source, 16, 16, palette) != 0)
+  {
+    return 0;
+  }
+  GFX2_LogHexDump(GFX2_DEBUG, "", dest, 0, 256);
+  for (i = 0; i < 256; i++)
+  {
+    if (memcmp(&source[i], &palette[dest[i]], sizeof(T_Components)) != 0)
+      return 0;
+  }
+  // TODO: test a real reduction
+  return 1;
+}