1 files changed, 63 insertions, 0 deletions
diff --git a/mpeglib/lib/util/render/dither/dither8Bit.h b/mpeglib/lib/util/render/dither/dither8Bit.h
new file mode 100644
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--- /dev/null
+++ b/mpeglib/lib/util/render/dither/dither8Bit.h
@@ -0,0 +1,63 @@
+/*
+  dither 8 bit depth yuv images
+  Copyright (C) 2000  Martin Vogt
+
+  This program is free software; you can redistribute it and/or modify
+  it under the terms of the GNU Library General Public License as published by
+  the Free Software Foundation.
+
+  For more information look at the file COPYRIGHT in this package
+
+ */
+
+
+
+#ifndef __DITHER_8BIT_H
+#define __DITHER_8BIT_H
+
+
+#include "colorTable8Bit.h"
+
+#define DITH_SIZE 16
+
+
+class Dither8Bit {
+
+  /* Structures used to implement hybrid ordered dither/floyd-steinberg
+     dither algorithm.
+  */
+  
+  unsigned char *l_darrays[DITH_SIZE];
+  unsigned char *cr_darrays[DITH_SIZE];
+  unsigned char *cb_darrays[DITH_SIZE];
+
+  // private colormap
+  unsigned char pixel[256];
+
+  ColorTable8Bit* colorTable8Bit;
+ 
+  // Arrays holding quantized value ranged for lum, cr, and cb. 
+  // (used for 8 Bit)
+  
+  int* lum_values;
+  int* cr_values;
+  int* cb_values;
+  
+
+ public:
+  Dither8Bit(unsigned char pixel[256]);
+  ~Dither8Bit();
+
+  void  ditherImageOrdered (unsigned char* lum,
+			    unsigned char* cr,
+			    unsigned char* cb,
+			    unsigned char* out,
+			    int h,
+			    int w);
+  
+ private:
+  void initOrderedDither();
+};
+
+#endif
+