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diff --git a/xicc/specplot.c b/xicc/specplot.c
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+
+/*
+ * International Color Consortium color transform expanded support
+ *
+ * Author: Graeme W. Gill
+ * Date: 2006/5/9
+ * Version: 1.00
+ *
+ * Copyright 2006 Graeme W. Gill
+ * All rights reserved.
+ * This material is licenced under the GNU AFFERO GENERAL PUBLIC LICENSE Version 3 :-
+ * see the License.txt file for licencing details.
+ *
+ */
+
+/*
+ * This is some test code to test the Daylight and Plankian spectra,
+ * Correlated and Visual Color Temperatures, and CRI.
+ * and plot a spectrum, CMF or CCSS.
+ */
+
+#include <stdio.h>
+#include <math.h>
+#include "xspect.h"
+#include "numlib.h"
+#include "plot.h"
+
+#define PLANKIAN
+#define XRES 500
+
+#define MAXGRAPHS 10
+
+#ifdef PLANKIAN
+#define BBTYPE icxIT_Ptemp
+#else
+#define BBTYPE icxIT_Dtemp
+#endif
+
+/* Display a spectrum etc. */
+/* We are guaranteed that the x range/increments are identical, */
+/* and that there is only one spectrum if douv */
+static int do_spec(
+ char name[MAXGRAPHS][200],
+ xspect *sp,
+ int nsp, /* Number of sp */
+ int dozero, /* Include zero in the range */
+ int douv, /* Do variation of added UV test */
+ double uvmin,
+ double uvmax
+) {
+ int n, i, j, k, m;
+ double wl_short, wl_long; /* Common range */
+ double xyz[3]; /* Color temperature */
+ double Yxy[3];
+ double Lab[3]; /* D50 Lab value */
+ double xx[XRES];
+ double yy[10][XRES];
+ double *yp[10];
+ double cct, vct;
+ double cct_xyz[3], vct_xyz[3];
+ double cct_lab[3], vct_lab[3];
+ icmXYZNumber wp;
+ double de;
+ double uv = uvmin;
+ double step = 0.1;
+ xspect tsp; /* Spectrum with possible UV added */
+ char *color[] = {
+ "Black", "Red", "Green", "Blue", "Yellow", "Purple", "Brown", "Orange", "Grey", "Magenta"
+ };
+
+ printf("\n");
+
+ for (j = 0; j < 10; j++)
+ yp[j] = NULL;
+
+ if (nsp > 10)
+ nsp = 10;
+
+ m = 0; /* offset in output array */
+ n = 1;
+
+ wl_short = 1e6;
+ wl_long = -1e6;
+ for (k = 0; k < nsp; k++) {
+ if (sp[k].spec_wl_long > wl_long)
+ wl_long = sp[k].spec_wl_long;
+ if (sp[k].spec_wl_short < wl_short)
+ wl_short = sp[k].spec_wl_short;
+ }
+
+ if (douv) {
+ n = 1 + (int)(0.5 + (uvmax-uvmin)/0.1);
+ if (n > 9)
+ n = 9; /* Don't use white */
+ if (n > 1)
+ step = (uvmax-uvmin)/(n-1.0);
+ }
+
+ for (k = 0; k < nsp; k++) {
+ tsp = sp[k];
+ for (uv = uvmax, j = 0; j < n; j++, uv -= step) {
+
+ if (douv) {
+ printf("UV level = %f\n",uv);
+ xsp_setUV(&tsp, &sp[k], uv);
+ }
+
+ /* Compute XYZ of illuminant */
+ if (icx_ill_sp2XYZ(xyz, icxOT_CIE_1931_2, NULL, icxIT_custom, 0, &tsp) != 0)
+ error ("icx_sp_temp2XYZ returned error");
+
+ icmXYZ2Yxy(Yxy, xyz);
+ icmXYZ2Lab(&icmD50, Lab, xyz);
+
+ printf("Type = %s [%s]\n",name[k], color[k]);
+ printf("XYZ = %f %f %f, x,y = %f %f\n", xyz[0], xyz[1], xyz[2], Yxy[1], Yxy[2]);
+ printf("D50 L*a*b* = %f %f %f\n", Lab[0], Lab[1], Lab[2]);
+
+#ifndef NEVER
+ /* Test density */
+ {
+ double dens[4];
+
+ xsp_Tdensity(dens, &tsp);
+
+ printf("CMYV density = %f %f %f %f\n", dens[0], dens[1], dens[2], dens[3]);
+ }
+#endif
+
+ /* Compute CCT */
+ if ((cct = icx_XYZ2ill_ct(cct_xyz, BBTYPE, icxOT_CIE_1931_2, NULL, xyz, NULL, 0)) < 0)
+ error ("Got bad cct\n");
+
+ /* Compute VCT */
+ if ((vct = icx_XYZ2ill_ct(vct_xyz, BBTYPE, icxOT_CIE_1931_2, NULL, xyz, NULL, 1)) < 0)
+ error ("Got bad vct\n");
+
+#ifdef PLANKIAN
+ printf("CCT = %f, VCT = %f\n",cct, vct);
+#else
+ printf("CDT = %f, VDT = %f\n",cct, vct);
+#endif
+
+ {
+ int invalid = 0;
+ double cri;
+ cri = icx_CIE1995_CRI(&invalid, &tsp);
+ printf("CRI = %.1f%s\n",cri,invalid ? " (Invalid)" : "");
+ }
+
+ /* Use modern color difference - gives a better visual match */
+ icmAry2XYZ(wp, vct_xyz);
+ icmXYZ2Lab(&wp, cct_lab, cct_xyz);
+ icmXYZ2Lab(&wp, vct_lab, vct_xyz);
+ de = icmCIE2K(cct_lab, vct_lab);
+ printf("CIEDE2000 Delta E = %f\n",de);
+
+ /* Plot spectrum out */
+ for (i = 0; i < XRES; i++) {
+ double ww;
+
+ ww = (wl_long - wl_short)
+ * ((double)i/(XRES-1.0)) + wl_short;
+
+ xx[i] = ww;
+ yy[(m + k + j) % 10][i] = value_xspect(&tsp, ww);
+ }
+ yp[(m + k + j) % 10] = &yy[(m + k + j) % 10][0];
+ }
+ }
+ do_plot10(xx, yp[0], yp[1], yp[2], yp[3], yp[4], yp[5], yp[6], yp[7], yp[8], yp[9], XRES, dozero);
+
+
+ return 0;
+}
+
+
+void usage(void) {
+ fprintf(stderr,"Plot spectrum and calculate CCT and VCT\n");
+ fprintf(stderr,"Author: Graeme W. Gill\n");
+ fprintf(stderr,"usage: specplot [infile.sp]\n");
+ fprintf(stderr," -v verbose\n");
+ fprintf(stderr," -c combine multiple files into one plot\n");
+ fprintf(stderr," -z don't make range cover zero\n");
+ fprintf(stderr," -u level plot effect of adding estimated UV level\n");
+ fprintf(stderr," -U plot effect of adding range of estimated UV level\n");
+ fprintf(stderr," [infile.sp ...] spectrum files to plot\n");
+ fprintf(stderr," default is all built in illuminants\n");
+ exit(1);
+}
+
+int
+main(
+ int argc,
+ char *argv[]
+) {
+ int fa, nfa; /* argument we're looking at */
+ int k;
+ int verb = 0;
+ int comb = 0;
+ int zero = 1;
+ double temp;
+ xspect sp[MAXGRAPHS];
+ icxIllumeType ilType;
+ int douv = 0;
+ double uvmin = -1.0, uvmax = 1.0;
+ char buf[MAXGRAPHS][200];
+
+ error_program = argv[0];
+
+ /* Process the arguments */
+ for(fa = 1;fa < argc;fa++) {
+ nfa = fa; /* skip to nfa if next argument is used */
+ if (argv[fa][0] == '-') { /* Look for any flags */
+ char *na = NULL; /* next argument after flag, null if none */
+
+ if (argv[fa][2] != '\000')
+ na = &argv[fa][2]; /* next is directly after flag */
+ else {
+ if ((fa+1) < argc) {
+ if (argv[fa+1][0] != '-') {
+ nfa = fa + 1;
+ na = argv[nfa]; /* next is seperate non-flag argument */
+ }
+ }
+ }
+
+ /* Show added UV */
+ if (argv[fa][1] == 'u') {
+ douv = 1;
+
+ fa = nfa;
+ if (na == NULL)
+ usage();
+
+ uvmin = uvmax = atof(na);
+ if (uvmin < -10.0 || uvmax > 10.0)
+ usage();
+ }
+
+ else if (argv[fa][1] == 'U') {
+ douv = 1;
+ }
+
+ /* Verbosity */
+ else if (argv[fa][1] == 'v' || argv[fa][1] == 'V') {
+ verb = 1;
+
+ } else if (argv[fa][1] == 'c' || argv[fa][1] == 'C') {
+ comb = 1;
+
+ } else if (argv[fa][1] == 'z' || argv[fa][1] == 'Z') {
+ zero = 0;
+
+ } else {
+ usage();
+ }
+ }
+ else
+ break;
+ }
+
+ if (fa < argc && argv[fa][0] != '-') { /* Got file arguments */
+ int nsp = 0; /* Current number in sp[] */
+ int soff = 0; /* Offset within file */
+ int maxgraphs = MAXGRAPHS;
+ int eof;
+
+ if (douv)
+ maxgraphs = 1;
+
+ nsp = 0;
+
+ /* Until we run out */
+ for (;;) {
+ int i, nret, nreq;
+
+ /* If we've got to the limit of each plot, */
+ /* or at least one and there are no more files, */
+ /* or at least one and we're not combining files and at start of a new file */
+ if (nsp >= MAXGRAPHS || (nsp > 0 && ((!comb && soff == 0) || fa >= argc))) {
+ /* Plot what we've got */
+ do_spec(buf, sp, nsp, zero, douv, uvmin, uvmax);
+ nsp = 0;
+ }
+
+ if (fa >= argc) /* No more files */
+ break;
+
+ /* Read as many spectra from the file as possible */
+ nreq = MAXGRAPHS - nsp;
+ if (read_nxspect(&sp[nsp], argv[fa], &nret, soff, nreq, 0) != 0) {
+ error ("Unable to read custom spectrum, CMF or CCSS '%s'",argv[fa]);
+ }
+ for (i = 0; i < nret; i++) {
+ xspect_denorm(&sp[nsp + i]);
+ sprintf(buf[nsp + i],"File '%s' spect %d",argv[fa], soff + i);
+ }
+ nsp += nret;
+ soff += nret;
+ if (nret < nreq) { /* We're done with this file */
+ fa++;
+ soff = 0;
+ }
+ }
+
+ } else {
+
+ /* For each standard illuminant */
+ for (ilType = icxIT_A; ilType <= icxIT_F10; ilType++) {
+ char *inm = NULL;
+
+ switch (ilType) {
+ case icxIT_A:
+ inm = "A"; break;
+ case icxIT_C:
+ inm = "C"; break;
+ case icxIT_D50:
+ inm = "D50"; break;
+ case icxIT_D50M2:
+ inm = "D50M2"; break;
+ case icxIT_D65:
+ inm = "D65"; break;
+ case icxIT_E:
+ inm = "E"; break;
+ case icxIT_F5:
+ inm = "F5"; break;
+ case icxIT_F8:
+ inm = "F8"; break;
+ case icxIT_F10:
+ inm = "F10"; break;
+ default:
+ inm = "Unknown"; break;
+ break;
+ }
+
+ if (standardIlluminant(&sp[0], ilType, 0) != 0)
+ error ("standardIlluminant returned error");
+
+ strcpy(buf[0],inm);
+ do_spec(buf, sp, 1, zero, douv, uvmin, uvmax);
+ }
+
+ /* For each material and illuminant */
+ for (temp = 2500; temp <= 9000; temp += 500) {
+
+ for (k = 0; k < 2; k++) {
+
+ ilType = k == 0 ? icxIT_Dtemp : icxIT_Ptemp;
+
+ if (standardIlluminant(&sp[0], ilType, temp) != 0)
+ error ("standardIlluminant returned error");
+
+ sprintf(buf[0], "%s at %f", k == 0 ? "Daylight" : "Black body", temp);
+
+ do_spec(buf, sp, 1, zero, douv, uvmin, uvmax);
+ }
+ }
+
+ }
+ return 0;
+}
+
+
+
+
+
+
+
+
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