diff options
Diffstat (limited to 'ff2png.c')
| -rw-r--r-- | ff2png.c | 23 |
1 files changed, 13 insertions, 10 deletions
@@ -14,7 +14,7 @@ static char *argv0; -/* ProPhoto RGB */ +/* ROMM RGB primaries (ISO 22028-2:2013) */ static cmsCIExyYTRIPLE primaries = { /* x, y, Y */ { 0.7347, 0.2653, 0.288040 }, /* red */ @@ -34,8 +34,8 @@ main(int argc, char *argv[]) { cmsContext icc_context; cmsHPROFILE out_prof; - cmsMLU *mlu1, *mlu2; - cmsToneCurve *gamma18, *out_curve[3]; + cmsMLU *mlu1, *mlu2, *mlu3; + cmsToneCurve *gamma10, *out_curve[3]; png_structp pngs; png_infop pngi; size_t png_row_len, j; @@ -62,25 +62,27 @@ main(int argc, char *argv[]) width = ntohl(*((uint32_t *)(hdr + 8))); height = ntohl(*((uint32_t *)(hdr + 12))); - /* icc profile (ProPhoto RGB) */ + /* icc profile (linear ROMM RGB (ISO 22028-2:2013)) */ if (!(icc_context = cmsCreateContext(NULL, NULL))) goto lcmserr; - if (!(gamma18 = cmsBuildGamma(icc_context, 1.8))) + if (!(gamma10 = cmsBuildGamma(icc_context, 1.0))) goto lcmserr; - out_curve[0] = out_curve[1] = out_curve[2] = gamma18; + out_curve[0] = out_curve[1] = out_curve[2] = gamma10; if (!(out_prof = cmsCreateRGBProfileTHR(icc_context, cmsD50_xyY(), &primaries, out_curve))) goto lcmserr; cmsSetHeaderFlags(out_prof, cmsEmbeddedProfileTrue | cmsUseAnywhere); cmsSetHeaderRenderingIntent(out_prof, INTENT_RELATIVE_COLORIMETRIC); cmsSetDeviceClass(out_prof, cmsSigColorSpaceClass); - if (!(mlu1 = cmsMLUalloc(NULL, 1)) || !(mlu2 = cmsMLUalloc(NULL, 1))) + if (!(mlu1 = cmsMLUalloc(NULL, 1)) || !(mlu2 = cmsMLUalloc(NULL, 1)) || + !(mlu3 = cmsMLUalloc(NULL, 1))) goto lcmserr; cmsMLUsetASCII(mlu1, "en", "US", "Public Domain"); cmsWriteTag(out_prof, cmsSigCopyrightTag, mlu1); - cmsMLUsetASCII(mlu2, "en", "US", "ProPhoto RGB"); - cmsWriteTag(out_prof, cmsSigProfileDescriptionTag, mlu2); + cmsMLUsetASCII(mlu2, "en", "US", "aka Linear ProPhoto RGB, Melissa RGB"); cmsWriteTag(out_prof, cmsSigDeviceModelDescTag, mlu2); + cmsMLUsetASCII(mlu3, "en", "US", "Linear ROMM RGB (ISO 22028-2:2013)"); + cmsWriteTag(out_prof, cmsSigProfileDescriptionTag, mlu3); cmsSaveProfileToMem(out_prof, NULL, &icclen); if (!(icc = malloc(icclen))) { fprintf(stderr, "%s: malloc: out of memory\n", argv0); @@ -101,7 +103,8 @@ main(int argc, char *argv[]) png_set_IHDR(pngs, pngi, width, height, 16, PNG_COLOR_TYPE_RGB_ALPHA, PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE); - png_set_iCCP(pngs, pngi, "ProPhoto RGB", 0, icc, icclen); + png_set_iCCP(pngs, pngi, "Linear ROMM RGB (ISO 22028-2:2013)", 0, + icc, icclen); png_write_info(pngs, pngi); /* write rows */ |