http://www.ousob.com --- Legacy Redefined OuSob - File: /wwwroot/clipx/usr/include/ppm.h

/* Interface header file for PPM-related functions in libnetpbm */ #ifndef _PPM_H_ #define _PPM_H_ #include "pgm.h" typedef gray pixval; #ifdef PPM_PACKCOLORS #define PPM_MAXMAXVAL 1023 typedef unsigned long pixel; #define PPM_GETR(p) (((p) & 0x3ff00000) >> 20) #define PPM_GETG(p) (((p) & 0xffc00) >> 10) #define PPM_GETB(p) ((p) & 0x3ff) /************* added definitions *****************/ #define PPM_PUTR(p, red) ((p) |= (((red) & 0x3ff) << 20)) #define PPM_PUTG(p, grn) ((p) |= (((grn) & 0x3ff) << 10)) #define PPM_PUTB(p, blu) ((p) |= ( (blu) & 0x3ff)) /**************************************************/ #define PPM_ASSIGN(p,red,grn,blu) (p) = ((pixel) (red) << 20) | ((pixel) (grn) << 10) | (pixel) (blu) #define PPM_EQUAL(p,q) ((p) == (q)) #else /*PPM_PACKCOLORS*/ #define PPM_OVERALLMAXVAL PGM_OVERALLMAXVAL #define PPM_MAXMAXVAL PGM_MAXMAXVAL typedef struct { pixval r, g, b; } pixel; #define PPM_GETR(p) ((p).r) #define PPM_GETG(p) ((p).g) #define PPM_GETB(p) ((p).b) /************* added definitions *****************/ #define PPM_PUTR(p,red) ((p).r = (red)) #define PPM_PUTG(p,grn) ((p).g = (grn)) #define PPM_PUTB(p,blu) ((p).b = (blu)) /**************************************************/ #define PPM_ASSIGN(p,red,grn,blu) do { (p).r = (red); (p).g = (grn); (p).b = (blu); } while ( 0 ) #define PPM_EQUAL(p,q) ( (p).r == (q).r && (p).g == (q).g && (p).b == (q).b ) #endif /*PPM_PACKCOLORS*/ /* Magic constants. */ #define PPM_MAGIC1 'P' #define PPM_MAGIC2 '3' #define RPPM_MAGIC2 '6' #define PPM_FORMAT (PPM_MAGIC1 * 256 + PPM_MAGIC2) #define RPPM_FORMAT (PPM_MAGIC1 * 256 + RPPM_MAGIC2) #define PPM_TYPE PPM_FORMAT #include "ppmcmap.h" /* Macro for turning a format number into a type number. */ #define PPM_FORMAT_TYPE(f) ((f) == PPM_FORMAT || (f) == RPPM_FORMAT ? PPM_TYPE : PGM_FORMAT_TYPE(f)) /* Declarations of routines. */ void ppm_init(int * argcP, char* argv[]); #define ppm_allocarray( cols, rows ) ((pixel**) pm_allocarray( cols, rows, sizeof(pixel) )) #define ppm_allocrow( cols ) ((pixel*) pm_allocrow( cols, sizeof(pixel) )) #define ppm_freearray( pixels, rows ) pm_freearray( (char**) pixels, rows ) #define ppm_freerow( pixelrow ) pm_freerow( (char*) pixelrow ) pixel** ppm_readppm(FILE * const fileP, int * const colsP, int * const rowsP, pixval * const maxvalP); void ppm_readppminit(FILE * const fileP, int * const colsP, int * const rowsP, pixval * const maxvalP, int * const formatP); void ppm_readppmrow(FILE* const fileP, pixel* const pixelrow, int const cols, pixval const maxval, int const format); void ppm_writeppm(FILE * const fileP, pixel** const pixels, int const cols, int const rows, pixval const maxval, int const forceplain); void ppm_writeppminit(FILE* const fileP, int const cols, int const rows, pixval const maxval, int const forceplain); void ppm_writeppmrow(FILE * const fileP, pixel * const pixelrow, int const cols, pixval const maxval, int const forceplain); void ppm_check(FILE * const fileP, enum pm_check_type const check_type, int const format, int const cols, int const rows, pixval const maxval, enum pm_check_code * const retval_p); void ppm_nextimage(FILE * const fileP, int * const eofP); pixel ppm_parsecolor(const char* colorname, pixval maxval); pixel ppm_parsecolor2(const char * const colorname, pixval const maxval, int const closeOk); char* ppm_colorname(const pixel* const colorP, pixval const maxval, int const hexok); void ppm_readcolordict(const char * const fileName, int const mustOpen, unsigned int * const nColorsP, const char *** const colornamesP, pixel ** const colorsP, colorhash_table * const chtP); void ppm_readcolornamefile(const char * const fileName, int const mustOpen, colorhash_table * const chtP, const char *** const colornamesP); void ppm_freecolornames(const char ** colornames); #define PPM_ISGRAY(pixel) \ (PPM_GETR(pixel) == PPM_GETG(pixel) && PPM_GETR(pixel) == PPM_GETB(pixel)) /* Color scaling macro -- to make writing ppmtowhatever easier. */ #define PPM_DEPTH(newp,p,oldmaxval,newmaxval) \ PPM_ASSIGN( (newp), \ ( (int) PPM_GETR(p) * (newmaxval) + (oldmaxval) / 2 ) / (oldmaxval), \ ( (int) PPM_GETG(p) * (newmaxval) + (oldmaxval) / 2 ) / (oldmaxval), \ ( (int) PPM_GETB(p) * (newmaxval) + (oldmaxval) / 2 ) / (oldmaxval) ) #define PPM_DISTANCE(p1,p2) ( \ SQR(PPM_GETR(p1)-PPM_GETR(p2)) + \ SQR(PPM_GETG(p1)-PPM_GETG(p2)) + \ SQR(PPM_GETB(p1)-PPM_GETB(p2)) ) /* Luminance, Chrominance macros. */ /* The following are weights of the red, green, and blue components respectively in the luminosity of a color */ #define PPM_LUMINR (0.2989) #define PPM_LUMING (0.5866) #define PPM_LUMINB (0.1145) #define PPM_LUMIN(p) ( PPM_LUMINR * PPM_GETR(p) \ + PPM_LUMING * PPM_GETG(p) \ + PPM_LUMINB * PPM_GETB(p) ) #define PPM_CHROM_B(p) ( -0.16874 * PPM_GETR(p) \ - 0.33126 * PPM_GETG(p) \ + 0.5 * PPM_GETB(p) ) #define PPM_CHROM_R(p) ( 0.5 * PPM_GETR(p) \ - 0.41869 * PPM_GETG(p) \ - 0.08131 * PPM_GETB(p) ) pixel color_from_ycbcr(unsigned int const y, int const cb, int const cr); #endif /*_PPM_H_*/