15 #ifndef PNMIMAGE_BASE_H
16 #define PNMIMAGE_BASE_H
21 #include "pandabase.h"
33 typedef unsigned short gray;
34 #define PGM_MAXMAXVAL 65535
36 typedef unsigned char gray;
37 #define PGM_MAXMAXVAL 255
38 #endif // PGM_BIGGRAYS
40 #define PNM_MAXMAXVAL PGM_MAXMAXVAL
45 pixel(gray r, gray g, gray b) : r(r), g(g), b(b) { }
46 static int size() {
return 3; }
47 gray operator [](
int i)
const { nassertr(i >= 0 && i < 3, 0);
return *(&r + i); }
48 gray &operator [](
int i) { nassertr(i >= 0 && i < 3, r);
return *(&r + i); }
50 {
return pixel(r + other.r, g + other.g, b + other.b); }
52 {
return pixel(r - other.r, g - other.g, b - other.b); }
53 pixel operator * (
const double mult)
const
54 {
return pixel(r * mult, g * mult, b * mult); }
55 void operator += (
const pixel &other)
56 { r += other.r; g += other.g; b += other.b; }
57 void operator -= (
const pixel &other)
58 { r -= other.r; g -= other.g; b -= other.b; }
59 void operator *= (
const double mult)
60 { r *= mult; g *= mult; b *= mult; }
63 void output(ostream &out) {
64 out <<
"pixel(r=" << r <<
", g=" << g <<
", b=" << b <<
")";
77 #define PPM_GETR(p) ((p).r)
78 #define PPM_GETG(p) ((p).g)
79 #define PPM_GETB(p) ((p).b)
81 #define PPM_PUTR(p,red) ((p).r = (red))
82 #define PPM_PUTG(p,grn) ((p).g = (grn))
83 #define PPM_PUTB(p,blu) ((p).b = (blu))
85 #define PPM_ASSIGN(p,red,grn,blu) { (p).r = (red); (p).g = (grn); (p).b = (blu); }
86 #define PPM_EQUAL(p,q) ( (p).r == (q).r && (p).g == (q).g && (p).b == (q).b )
87 #define PNM_ASSIGN1(x,v) PPM_ASSIGN(x,0,0,v)
89 #define PPM_DEPTH(newp,p,oldmaxval,newmaxval) \
91 ( (int) PPM_GETR(p) * (newmaxval) + (oldmaxval) / 2 ) / (oldmaxval), \
92 ( (int) PPM_GETG(p) * (newmaxval) + (oldmaxval) / 2 ) / (oldmaxval), \
93 ( (int) PPM_GETB(p) * (newmaxval) + (oldmaxval) / 2 ) / (oldmaxval) )
98 EXPCL_PANDA_PNMIMAGE
void pm_message(
const char *format, ...);
99 EXPCL_PANDA_PNMIMAGE
void pm_error(
const char *format, ...);
101 EXPCL_PANDA_PNMIMAGE
int pm_maxvaltobits(
int maxval);
102 EXPCL_PANDA_PNMIMAGE
int pm_bitstomaxval(
int bits);
104 EXPCL_PANDA_PNMIMAGE
char *pm_allocrow(
int cols,
int size);
105 EXPCL_PANDA_PNMIMAGE
void pm_freerow(
char *itrow);
107 EXPCL_PANDA_PNMIMAGE
int pm_readbigshort(istream *in,
short *sP);
108 EXPCL_PANDA_PNMIMAGE
int pm_writebigshort(ostream *out,
short s);
109 EXPCL_PANDA_PNMIMAGE
int pm_readbiglong(istream *in,
long *lP);
110 EXPCL_PANDA_PNMIMAGE
int pm_writebiglong(ostream *out,
long l);
111 EXPCL_PANDA_PNMIMAGE
int pm_readlittleshort(istream *in,
short *sP);
112 EXPCL_PANDA_PNMIMAGE
int pm_writelittleshort(ostream *out,
short s);
113 EXPCL_PANDA_PNMIMAGE
int pm_readlittlelong(istream *in,
long *lP);
114 EXPCL_PANDA_PNMIMAGE
int pm_writelittlelong(ostream *out,
long l);
119 static const float lumin_red = 0.299f;
120 static const float lumin_grn = 0.587f;
121 static const float lumin_blu = 0.114f;