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1 files changed, 115 insertions, 0 deletions

diff --git a/gen.c b/gen.c
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+/*
+ *  Compface - 48x48x1 image compression and decompression
+ *
+ *  Copyright (c) James Ashton - Sydney University - June 1990.
+ *
+ *  Written 11th November 1989.
+ *
+ *  Permission is given to distribute these sources, as long as the
+ *  copyright messages are not removed, and no monies are exchanged. 
+ *
+ *  No responsibility is taken for any errors on inaccuracies inherent
+ *  either to the comments or the code of this program, but if reported
+ *  to me, then an attempt will be made to fix them.
+ */
+
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "compface.h"
+
+#define GEN(g) F[h] ^= G.g[k]; break
+
+static void Gen P((char *)) ;
+
+static void
+Gen(f)
+register char *f;
+{
+	register int m, l, k, j, i, h;
+
+	for (j = 0; j < HEIGHT;  j++)
+	{
+		for (i = 0; i < WIDTH;  i++)
+		{
+			h = i + j * WIDTH;
+			k = 0;
+			for (l = i - 2; l <= i + 2; l++)
+				for (m = j - 2; m <= j; m++)
+				{
+					if ((l >= i) && (m == j))
+						continue;
+					if ((l > 0) && (l <= WIDTH) && (m > 0))
+						k = *(f + l + m * WIDTH) ? k * 2 + 1 : k * 2;
+				}
+			switch (i)
+			{
+				case 1 :
+					switch (j)
+					{
+						case 1 : GEN(g_22);
+						case 2 : GEN(g_21);
+						default : GEN(g_20);
+					}
+					break;
+				case 2 :
+					switch (j)
+					{
+						case 1 : GEN(g_12);
+						case 2 : GEN(g_11);
+						default : GEN(g_10);
+					}
+					break;
+				case WIDTH - 1 :
+					switch (j)
+					{
+						case 1 : GEN(g_42);
+						case 2 : GEN(g_41);
+						default : GEN(g_40);
+					}
+					break;
+				case WIDTH :
+					switch (j)
+					{
+						case 1 : GEN(g_32);
+						case 2 : GEN(g_31);
+						default : GEN(g_30);
+					}
+					break;
+				default :
+					switch (j)
+					{
+						case 1 : GEN(g_02);
+						case 2 : GEN(g_01);
+						default : GEN(g_00);
+					}
+					break;
+			}
+		}
+	}
+}
+
+void
+GenFace()
+{
+	static char new[PIXELS];
+	register char *f1;
+	register char *f2;
+	register int i;
+
+	f1 = new;
+	f2 = F;
+	i = PIXELS;
+	while (i-- > 0)
+		*(f1++) = *(f2++);
+	Gen(new);
+}
+
+void
+UnGenFace()
+{
+	Gen(F);
+}
+