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#include <lcms.h>
#include "pnm.h"
static int
pam_transform(FILE *in_fp, FILE *out_fp,
const struct pnm *in_pnm, cmsHTRANSFORM *hTransform);
int
main(int argc, char **argv) {
int c, i, nProf = 0;
char *in_prof = NULL, *out_prof = NULL;
double gamma = 0.0;
cmsHTRANSFORM hTransform;
cmsHPROFILE profiles[3];
struct pnm in_pnm;
while ((c = getopt(argc, argv, "i:o:g:")) != EOF) {
switch (c) {
case 'i':
in_prof = optarg;
break;
case 'o':
out_prof = optarg;
break;
case 'g':
gamma = atof(optarg);
break;
default:
break;
}
}
if (in_prof) {
profiles[nProf++] = cmsOpenProfileFromFile(in_prof, "r");
} else {
profiles[nProf++] = cmsCreate_sRGBProfile();
}
if (gamma) {
LPGAMMATABLE gTable[3];
gTable[0] = cmsBuildGamma(256, gamma);
gTable[1] = gTable[2] = cmsBuildGamma(256, 1.0);
profiles[nProf++] = cmsCreateLinearizationDeviceLink(
icSigLabData,
gTable);
}
if (out_prof) {
profiles[nProf++] = cmsOpenProfileFromFile(out_prof, "r");
} else {
profiles[nProf++] = cmsCreate_sRGBProfile();
}
hTransform = cmsCreateMultiprofileTransform(
profiles,
nProf,
TYPE_RGB_16_SE,
TYPE_RGB_16_SE,
INTENT_PERCEPTUAL,
0);
if (readPnmHeader(stdin, &in_pnm) != 0) {
exit(1);
}
writePnmHeader(stdout, &in_pnm);
pam_transform(stdin, stdout, &in_pnm, &hTransform);
cmsDeleteTransform(hTransform);
for (i = 0; i < nProf; i++) {
cmsCloseProfile(profiles[i]);
}
return 0;
}
static int
pam_transform(FILE *in_fp, FILE *out_fp,
const struct pnm *in_pnm, cmsHTRANSFORM *hTransform)
{
int row, col;
char *in_buf = malloc(in_pnm->width * 2 * 3);
char *out_buf = malloc(in_pnm->width * 2 * 3);
for (row = 0; row < in_pnm->height; row++) {
fread(in_buf, in_pnm->width, 2 * 3, in_fp);
cmsDoTransform(*hTransform, in_buf, out_buf, in_pnm->width);
fwrite(out_buf, in_pnm->width, 2 * 3, out_fp);
}
free(in_buf);
free(out_buf);
return 0;
}
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