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utils/mxtk/mxpcx.cpp

@@ -0,0 +1,98 @@
+//
+//                 mxToolKit (c) 1999 by Mete Ciragan
+//
+// file:           mxPcx.cpp
+// implementation: all
+// last modified:  Apr 15 1999, Mete Ciragan
+// copyright:      The programs and associated files contained in this
+//                 distribution were developed by Mete Ciragan. The programs
+//                 are not in the public domain, but they are freely
+//                 distributable without licensing fees. These programs are
+//                 provided without guarantee or warrantee expressed or
+//                 implied.
+//
+#include "mxtk/mxPcx.h"
+#include <stdio.h>
+#include <stdlib.h>
+
+
+
+mxImage *
+mxPcxRead (const char *filename)
+{
+    FILE *file = fopen (filename, "rb");
+    if (!file)
+        return 0;
+
+	mxPcxHeader header;
+    if (fread (&header, sizeof (mxPcxHeader), 1, file) == -1)
+	{
+        fclose (file);
+        return 0;
+    }
+/*
+    if (header.bitsPerPixel != 8 ||
+		header.version != 5)
+	{
+        fclose (file);
+        return 0;
+    }
+
+    (void) fseek (file, -769, SEEK_END);
+    if (fgetc (file) != 12) {
+        fclose (file);
+        return NULL;
+    }
+*/
+	(void) fseek (file, -768, SEEK_END);
+
+    int w = header.xmax - header.xmin + 1;
+    int h = header.ymax - header.ymin + 1;
+
+	mxImage *image = new mxImage ();
+	if (!image->create (w, h, 8))
+	{
+		delete image;
+		fclose (file);
+		return 0;
+	}
+
+    if (fread ((byte *) image->palette, sizeof (byte), 768, file) == -1)
+	{
+        fclose (file);
+        return 0;
+    }
+
+    (void) fseek(file, sizeof (mxPcxHeader), SEEK_SET);
+    int ptr = 0;
+	int ch, rep;
+	byte *data = (byte *) image->data;
+	int size = w * h;
+    while (ptr < size)
+	{
+        ch = fgetc(file);
+        if (ch >= 192)
+		{
+            rep = ch - 192;
+            ch = fgetc(file);
+        }
+        else {
+            rep = 1;
+        }
+
+        while (rep--)
+			data[ptr++] = (byte)ch;
+    }
+
+    fclose(file);
+
+	return image;
+}
+
+
+
+bool
+mxPcxWrite (const char * /*filename*/, mxImage * /*image*/)
+{
+	return false;
+}