| 1 |
#ifndef lint
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| 2 |
static const char RCSid[] = "$Id: ra_t16.c,v 2.11 2025/06/06 19:11:21 greg Exp $";
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| 3 |
#endif
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| 4 |
/*
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| 5 |
* ra_t16.c - program to convert between RADIANCE and
|
| 6 |
* Targa 16, 24 and 32-bit images.
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| 7 |
*
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| 8 |
* 11/2/88 Adapted from ra_t8.c
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| 9 |
*/
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| 10 |
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| 11 |
#include <math.h>
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| 12 |
#include "platform.h"
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| 13 |
#include "rtio.h"
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| 14 |
#include "rtmisc.h"
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| 15 |
#include "color.h"
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| 16 |
#include "resolu.h"
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| 17 |
#include "random.h"
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| 18 |
#include "targa.h"
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| 19 |
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| 20 |
#define goodpic(h) (((h)->dataType==IM_RGB || (h)->dataType==IM_CRGB) \
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| 21 |
&& ((h)->dataBits==16 || (h)->dataBits==24))
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| 22 |
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| 23 |
#define taralloc(h) (unsigned char *)emalloc((h)->x*(h)->y*(h)->dataBits/8)
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| 24 |
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| 25 |
#define readtarga(h,d,f) ((h)->dataBits==16 ? \
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readt16(h,(unsigned short*)d,f) : readt24(h,d,f))
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| 27 |
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| 28 |
#define writetarga(h,d,f) ((h)->dataBits==16 ? \
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| 29 |
writet16(h,(unsigned short*)d,f) : writet24(h,d,f))
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| 30 |
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| 31 |
double gamcor = 2.2; /* gamma correction */
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| 32 |
int bradj = 0; /* brightness adjustment */
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| 33 |
char msg[128];
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| 34 |
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| 35 |
static int getint2(FILE *fp);
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| 36 |
static void putint2(int i, FILE *fp);
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| 37 |
static void quiterr(char *err);
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| 38 |
static int getthead(struct hdStruct *hp, char *ip, FILE *fp);
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| 39 |
static int putthead(struct hdStruct *hp, char *ip, FILE *fp);
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| 40 |
static void tg2ra(struct hdStruct *hp);
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| 41 |
static void ra2tg(struct hdStruct *hp);
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| 42 |
static void writet24(struct hdStruct *h, unsigned char *d, FILE *fp);
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| 43 |
static void writet16(struct hdStruct *h, unsigned short *d, FILE *fp);
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static void readt24(struct hdStruct *h, unsigned char *data, FILE *fp);
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static void readt16(struct hdStruct *h, unsigned short *data, FILE *fp);
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| 47 |
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int
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main(int argc, char *argv[])
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{
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struct hdStruct head;
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int reverse = 0;
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int i;
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| 54 |
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SET_DEFAULT_BINARY();
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SET_FILE_BINARY(stdin);
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SET_FILE_BINARY(stdout);
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fixargv0(argv[0]);
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head.dataBits = 16;
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for (i = 1; i < argc; i++)
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if (argv[i][0] == '-')
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switch (argv[i][1]) {
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case 'g':
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gamcor = atof(argv[++i]);
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break;
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case 'r':
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reverse = !reverse;
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break;
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case '2':
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head.dataBits = 16;
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break;
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case '3':
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head.dataBits = 24;
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break;
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case 'e':
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if (argv[i+1][0] != '+' && argv[i+1][0] != '-')
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goto userr;
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bradj = atoi(argv[++i]);
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break;
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default:
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goto userr;
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}
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else
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break;
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if (i < argc-2)
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goto userr;
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/* open input file */
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if (i <= argc-1 && freopen(argv[i], "r", stdin) == NULL) {
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sprintf(msg, "can't open input \"%s\"", argv[i]);
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quiterr(msg);
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}
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/* open output file */
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if (i == argc-2 && freopen(argv[i+1], "w", stdout) == NULL) {
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sprintf(msg, "can't open output \"%s\"", argv[i+1]);
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quiterr(msg);
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}
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/* set gamma */
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setcolrgam(gamcor);
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/* convert */
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if (reverse) {
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/* get header */
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if (getthead(&head, NULL, stdin) < 0)
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quiterr("bad targa file");
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if (!goodpic(&head))
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quiterr("incompatible format");
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/* put header */
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newheader("RADIANCE", stdout);
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printargs(i, argv, stdout);
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fputformat(COLRFMT, stdout);
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putchar('\n');
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fprtresolu(head.x, head.y, stdout);
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/* convert file */
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tg2ra(&head);
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} else {
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if (checkheader(stdin, COLRFMT, NULL) < 0 ||
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fgetresolu(&head.x, &head.y, stdin) < 0)
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quiterr("bad picture file");
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/* assign header */
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head.textSize = 0;
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head.mapType = CM_NOMAP;
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head.dataType = IM_RGB;
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head.XOffset = 0;
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head.YOffset = 0;
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head.imType = 0;
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/* write header */
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putthead(&head, NULL, stdout);
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/* convert file */
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ra2tg(&head);
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}
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exit(0);
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userr:
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fprintf(stderr, "Usage: %s [-2|-3|-r][-g gamma][-e +/-stops] [input [output]]\n",
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progname);
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exit(1);
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}
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static int
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getint2( /* get a 2-byte positive integer */
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register FILE *fp
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| 143 |
)
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{
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register int b1, b2;
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| 146 |
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if ((b1 = getc(fp)) == EOF || (b2 = getc(fp)) == EOF)
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quiterr("read error");
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return(b1 | b2<<8);
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}
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static void
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putint2( /* put a 2-byte positive integer */
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register int i,
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register FILE *fp
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)
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{
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putc(i&0xff, fp);
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putc(i>>8&0xff, fp);
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}
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static void
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quiterr( /* print message and exit */
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char *err
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)
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{
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fprintf(stderr, "%s: %s\n", progname, err);
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exit(1);
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}
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void
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eputs(
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char *s
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)
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{
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fputs(s, stderr);
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}
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void
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quit(
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int code
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)
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{
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exit(code);
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}
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| 192 |
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static int
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getthead( /* read header from input */
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struct hdStruct *hp,
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char *ip,
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register FILE *fp
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| 198 |
)
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| 199 |
{
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| 200 |
int nidbytes;
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| 201 |
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| 202 |
if ((nidbytes = getc(fp)) == EOF)
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return(-1);
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hp->mapType = getc(fp);
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hp->dataType = getc(fp);
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hp->mapOrig = getint2(fp);
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hp->mapLength = getint2(fp);
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hp->CMapBits = getc(fp);
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hp->XOffset = getint2(fp);
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hp->YOffset = getint2(fp);
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hp->x = getint2(fp);
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hp->y = getint2(fp);
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hp->dataBits = getc(fp);
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hp->imType = getc(fp);
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| 215 |
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| 216 |
if (ip != NULL)
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if (nidbytes)
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fread((char *)ip, nidbytes, 1, fp);
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else
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*ip = '\0';
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else if (nidbytes)
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fseek(fp, (long)nidbytes, 1);
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| 223 |
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return(feof(fp) || ferror(fp) ? -1 : 0);
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}
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| 227 |
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static int
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putthead( /* write header to output */
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| 230 |
struct hdStruct *hp,
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| 231 |
char *ip,
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| 232 |
register FILE *fp
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| 233 |
)
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| 234 |
{
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| 235 |
if (ip != NULL)
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| 236 |
putc(strlen(ip), fp);
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else
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putc(0, fp);
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| 239 |
putc(hp->mapType, fp);
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| 240 |
putc(hp->dataType, fp);
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| 241 |
putint2(hp->mapOrig, fp);
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| 242 |
putint2(hp->mapLength, fp);
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| 243 |
putc(hp->CMapBits, fp);
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| 244 |
putint2(hp->XOffset, fp);
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| 245 |
putint2(hp->YOffset, fp);
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| 246 |
putint2(hp->x, fp);
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| 247 |
putint2(hp->y, fp);
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| 248 |
putc(hp->dataBits, fp);
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| 249 |
putc(hp->imType, fp);
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| 250 |
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| 251 |
if (ip != NULL)
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| 252 |
fputs(ip, fp);
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| 253 |
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| 254 |
return(ferror(fp) ? -1 : 0);
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| 255 |
}
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| 256 |
|
| 257 |
|
| 258 |
static void
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| 259 |
tg2ra( /* targa file to RADIANCE file */
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| 260 |
struct hdStruct *hp
|
| 261 |
)
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| 262 |
{
|
| 263 |
COLR *scanline;
|
| 264 |
unsigned char *tarData;
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| 265 |
register int i, j;
|
| 266 |
/* skip color table */
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| 267 |
if (hp->mapType == CM_HASMAP)
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| 268 |
fseek(stdin, (long)hp->mapLength*hp->CMapBits/8, 1);
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| 269 |
/* allocate targa data */
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| 270 |
tarData = taralloc(hp);
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| 271 |
/* get data */
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| 272 |
readtarga(hp, tarData, stdin);
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| 273 |
/* allocate input scanline */
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| 274 |
scanline = (COLR *)emalloc(hp->x*sizeof(COLR));
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| 275 |
/* convert file */
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| 276 |
for (i = hp->y-1; i >= 0; i--) {
|
| 277 |
if (hp->dataBits == 16) {
|
| 278 |
register unsigned short *dp;
|
| 279 |
dp = (unsigned short *)tarData + i*hp->x;
|
| 280 |
for (j = 0; j < hp->x; j++) {
|
| 281 |
scanline[j][RED] = *dp>>7 & 0xf8;
|
| 282 |
scanline[j][GRN] = *dp>>2 & 0xf8;
|
| 283 |
scanline[j][BLU] = *dp<<3 & 0xf8;
|
| 284 |
dp++;
|
| 285 |
}
|
| 286 |
} else { /* hp->dataBits == 24 */
|
| 287 |
register unsigned char *dp;
|
| 288 |
dp = (unsigned char *)tarData + i*3*hp->x;
|
| 289 |
for (j = 0; j < hp->x; j++) {
|
| 290 |
scanline[j][RED] = dp[2];
|
| 291 |
scanline[j][GRN] = dp[1];
|
| 292 |
scanline[j][BLU] = dp[0];
|
| 293 |
dp += 3;
|
| 294 |
}
|
| 295 |
}
|
| 296 |
gambs_colrs(scanline, hp->x);
|
| 297 |
if (bradj)
|
| 298 |
shiftcolrs(scanline, hp->x, bradj);
|
| 299 |
if (fwritecolrs(scanline, hp->x, stdout) < 0)
|
| 300 |
quiterr("error writing RADIANCE file");
|
| 301 |
}
|
| 302 |
free((void *)scanline);
|
| 303 |
free((void *)tarData);
|
| 304 |
}
|
| 305 |
|
| 306 |
|
| 307 |
static void
|
| 308 |
ra2tg( /* convert radiance to targa file */
|
| 309 |
struct hdStruct *hp
|
| 310 |
)
|
| 311 |
{
|
| 312 |
register int i, j;
|
| 313 |
unsigned char *tarData;
|
| 314 |
COLR *inl;
|
| 315 |
/* allocate space for data */
|
| 316 |
inl = (COLR *)emalloc(hp->x*sizeof(COLR));
|
| 317 |
tarData = taralloc(hp);
|
| 318 |
/* convert file */
|
| 319 |
for (j = hp->y-1; j >= 0; j--) {
|
| 320 |
if (freadcolrs(inl, hp->x, stdin) < 0)
|
| 321 |
quiterr("error reading RADIANCE file");
|
| 322 |
if (bradj)
|
| 323 |
shiftcolrs(inl, hp->x, bradj);
|
| 324 |
colrs_gambs(inl, hp->x);
|
| 325 |
if (hp->dataBits == 16) {
|
| 326 |
register unsigned short *dp;
|
| 327 |
register int v;
|
| 328 |
dp = (unsigned short *)tarData + j*hp->x;
|
| 329 |
for (i = 0; i < hp->x; i++) {
|
| 330 |
v = inl[i][RED] + (random()&7);
|
| 331 |
if (v > 255) v = 255;
|
| 332 |
*dp = (v&0xf8)<<7;
|
| 333 |
v = inl[i][GRN] + (random()&7);
|
| 334 |
if (v > 255) v = 255;
|
| 335 |
*dp |= (v&0xf8)<<2;
|
| 336 |
v = inl[i][BLU] + (random()&7);
|
| 337 |
if (v > 255) v = 255;
|
| 338 |
*dp++ |= v>>3;
|
| 339 |
}
|
| 340 |
} else { /* hp->dataBits == 24 */
|
| 341 |
register unsigned char *dp;
|
| 342 |
dp = (unsigned char *)tarData + j*3*hp->x;
|
| 343 |
for (i = 0; i < hp->x; i++) {
|
| 344 |
*dp++ = inl[i][BLU];
|
| 345 |
*dp++ = inl[i][GRN];
|
| 346 |
*dp++ = inl[i][RED];
|
| 347 |
}
|
| 348 |
}
|
| 349 |
}
|
| 350 |
/* write out targa data */
|
| 351 |
writetarga(hp, tarData, stdout);
|
| 352 |
|
| 353 |
free((void *)inl);
|
| 354 |
free((void *)tarData);
|
| 355 |
}
|
| 356 |
|
| 357 |
|
| 358 |
static void
|
| 359 |
writet24( /* write out 24-bit targa data */
|
| 360 |
struct hdStruct *h,
|
| 361 |
unsigned char *d,
|
| 362 |
FILE *fp
|
| 363 |
)
|
| 364 |
{
|
| 365 |
if (h->dataType == IM_RGB) { /* uncompressed */
|
| 366 |
if (fwrite((char *)d, 3*h->x, h->y, fp) != h->y)
|
| 367 |
quiterr("error writing targa file");
|
| 368 |
return;
|
| 369 |
}
|
| 370 |
quiterr("unsupported output type");
|
| 371 |
}
|
| 372 |
|
| 373 |
|
| 374 |
static void
|
| 375 |
writet16( /* write out 16-bit targa data */
|
| 376 |
struct hdStruct *h,
|
| 377 |
register unsigned short *d,
|
| 378 |
FILE *fp
|
| 379 |
)
|
| 380 |
{
|
| 381 |
register int cnt;
|
| 382 |
|
| 383 |
if (h->dataType == IM_RGB) { /* uncompressed */
|
| 384 |
for (cnt = h->x*h->y; cnt-- > 0; )
|
| 385 |
putint2(*d++, fp);
|
| 386 |
if (ferror(fp))
|
| 387 |
quiterr("error writing targa file");
|
| 388 |
return;
|
| 389 |
}
|
| 390 |
quiterr("unsupported output type");
|
| 391 |
}
|
| 392 |
|
| 393 |
|
| 394 |
static void
|
| 395 |
readt24( /* read in 24-bit targa data */
|
| 396 |
register struct hdStruct *h,
|
| 397 |
unsigned char *data,
|
| 398 |
FILE *fp
|
| 399 |
)
|
| 400 |
{
|
| 401 |
register int cnt, c;
|
| 402 |
register unsigned char *dp;
|
| 403 |
int r, g, b;
|
| 404 |
|
| 405 |
if (h->dataType == IM_RGB) { /* uncompressed */
|
| 406 |
if (fread((char *)data, 3*h->x, h->y, fp) != h->y)
|
| 407 |
goto readerr;
|
| 408 |
return;
|
| 409 |
}
|
| 410 |
for (dp = data; dp < data+3*h->x*h->y; ) {
|
| 411 |
if ((c = getc(fp)) == EOF)
|
| 412 |
goto readerr;
|
| 413 |
cnt = (c & 0x7f) + 1;
|
| 414 |
if (c & 0x80) { /* repeated pixel */
|
| 415 |
b = getc(fp); g = getc(fp);
|
| 416 |
if ((r = getc(fp)) == EOF)
|
| 417 |
goto readerr;
|
| 418 |
while (cnt--) {
|
| 419 |
*dp++ = b;
|
| 420 |
*dp++ = g;
|
| 421 |
*dp++ = r;
|
| 422 |
}
|
| 423 |
} else /* non-repeating pixels */
|
| 424 |
while (cnt--) {
|
| 425 |
*dp++ = getc(fp); *dp++ = getc(fp);
|
| 426 |
if ((r = getc(fp)) == EOF)
|
| 427 |
goto readerr;
|
| 428 |
*dp++ = r;
|
| 429 |
}
|
| 430 |
}
|
| 431 |
return;
|
| 432 |
readerr:
|
| 433 |
quiterr("error reading targa file");
|
| 434 |
}
|
| 435 |
|
| 436 |
|
| 437 |
static void
|
| 438 |
readt16( /* read in 16-bit targa data */
|
| 439 |
register struct hdStruct *h,
|
| 440 |
unsigned short *data,
|
| 441 |
FILE *fp
|
| 442 |
)
|
| 443 |
{
|
| 444 |
register int cnt, c;
|
| 445 |
register unsigned short *dp;
|
| 446 |
|
| 447 |
if (h->dataType == IM_RGB) { /* uncompressed */
|
| 448 |
dp = data;
|
| 449 |
for (cnt = h->x*h->y; cnt-- > 0; )
|
| 450 |
*dp++ = getint2(fp);
|
| 451 |
return;
|
| 452 |
}
|
| 453 |
for (dp = data; dp < data+h->x*h->y; ) {
|
| 454 |
if ((c = getc(fp)) == EOF)
|
| 455 |
goto readerr;
|
| 456 |
cnt = (c & 0x7f) + 1;
|
| 457 |
if (c & 0x80) { /* repeated pixel */
|
| 458 |
c = getint2(fp);
|
| 459 |
while (cnt--)
|
| 460 |
*dp++ = c;
|
| 461 |
} else /* non-repeating pixels */
|
| 462 |
while (cnt--)
|
| 463 |
*dp++ = getint2(fp);
|
| 464 |
}
|
| 465 |
return;
|
| 466 |
readerr:
|
| 467 |
quiterr("error reading targa file");
|
| 468 |
}
|
