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/* RCSid: $Id: pic.h,v 2.3 2003/07/14 22:24:00 schorsch Exp $ */
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/* the following three structures are used by ciq */
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#ifndef _RAD_PIC_H_
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#define _RAD_PIC_H_
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#ifdef __cplusplus
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extern "C" {
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#endif
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typedef int colormap[3][256];
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typedef unsigned char pixel;
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typedef struct {
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pixel r,g,b;
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} rgbpixel;
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#define rgb_bright(p) (int)((77L*(p)->r+151L*(p)->g+28L*(p)->b)/256)
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/* image resolution */
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extern int xmax,ymax;
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/* defined in closest.c */
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extern void initializeclosest(void);
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extern int closest(int r, int g, int b);
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/* defined in cut.c */
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extern int makecm(int nw, int *na);
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/* defined in ciq.c */
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extern void ciq(int dith, int nw, int synth, colormap cm);
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/* defined in biq.c */
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extern void biq(int dith, int nw, int synth, colormap cm);
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/* defined in in the calling program */
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extern void picreadcm(colormap map);
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extern void picwritecm(colormap cm);
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extern void picwriteline(int y, pixel *l);
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extern void picreadline3(int y, rgbpixel *l3);
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#ifdef __cplusplus
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}
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#endif
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#endif /* _RAD_PIC_H_ */
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