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+
+/*
+ * nearsmth test code. Test the smoothed nearpoint routine.
+ *
+ * Author: Graeme W. Gill
+ * Date: 17/1/2002
+ * Version: 1.00
+ *
+ * Copyright 2002, 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.
+ */
+
+/* TTBD:
+ *
+ */
+
+#undef DEBUG /* test a single value out */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdarg.h>
+#include <fcntl.h>
+#include <string.h>
+#include <math.h>
+#if defined(__IBMC__) && defined(_M_IX86)
+#include <float.h>
+#endif
+
+#include "copyright.h"
+#include "aconfig.h"
+#include "numlib.h"
+#include "rspl.h"
+#include "gamut.h"
+#include "nearsmth.h"
+
+double m21po[3] = { 2.0, 1.0, 2.0 }; /* Many to 1 filter mixing power LCh (theoretically 2) */
+
+/* Mapping weights */
+gammapweights weights[] = {
+ {
+ gmm_default, /* Non hue specific defaults */
+ { /* Cusp alignment control */
+ {
+ 0.0, /* Cusp luminance alignment weighting 0 = none, 1 = full */
+ 0.0, /* Cusp chroma alignment weighting 0 = none, 1 = full */
+ 0.2 /* Cusp hue alignment weighting 0 = none, 1 = full */
+ },
+ 1.00 /* Chroma expansion 1 = none */
+ },
+ { /* Radial weighting */
+ 0.0, /* Radial error overall weight, 0 + */
+ 0.5, /* Radial hue dominance vs l+c, 0 - 1 */
+ 0.5 /* Radial l dominance vs, c, 0 - 1 */
+ },
+ { /* Weighting of absolute error of destination from source */
+ 1.0, /* Absolute error overall weight */
+ 0.5, /* Hue dominance vs l+c, 0 - 1 */
+
+ 0.9, /* Light l dominance vs, c, 0 - 1 */
+ 0.9, /* Medium l dominance vs, c, 0 - 1 */
+ 0.9, /* Dark l dominance vs, c, 0 - 1 */
+
+ 0.5, /* l/c dominance breakpoint, 0 - 1 */
+ 0.0, /* l dominance exageration, 0+ */
+ 0.0 /* c dominance exageration, 0+ */
+ },
+ { /* Relative vector smoothing */
+ 30.0, 20.0 /* Relative Smoothing radius L* H* */
+ },
+ { /* Weighting of excessive compression error, which is */
+ /* the src->dst vector length over the available dst depth. */
+ /* The depth is half the distance to the intersection of the */
+ /* vector to the other side of the gamut. (doesn't get triggered much ?) */
+ 100.0, /* Compression depth weight */
+ 100.0 /* Expansion depth weight */
+ }
+ }
+};
+
+#define OVERSHOOT 1.0
+
+void usage(void) {
+ fprintf(stderr,"Create smoothed near mapping between two gamuts, Version %s\n",ARGYLL_VERSION_STR);
+ fprintf(stderr,"Author: Graeme W. Gill, licensed under the AGPL Version 3\n");
+ fprintf(stderr,"usage: smthtest [options] ingamut outgamut diag_vrml\n");
+ fprintf(stderr," -v Verbose\n");
+// fprintf(stderr," -s nearf Absolute delta E weighting\n");
+ exit(1);
+}
+
+FILE *start_vrml(char *name, int doaxes);
+void start_line_set(FILE *wrl);
+void add_vertex(FILE *wrl, double pp[3]);
+void make_lines(FILE *wrl, int ppset);
+void end_vrml(FILE *wrl);
+
+int
+main(int argc, char *argv[]) {
+ int fa,nfa; /* argument we're looking at */
+ char *xl;
+ char in_name[100];
+ char out_name[100];
+ char diag_name[100];
+ int verb = 0;
+ double nearf = 1.0; /* Absolute delta E weightign */
+ datai il, ih; /* rspl input range */
+ datao ol, oh; /* rspl output range */
+
+ gamut *gin, *gout; /* Input and Output gamuts */
+ nearsmth *nsm; /* Returned list of near smooth points */
+ int nnsm; /* Number of near smoothed points */
+ FILE *wrl; /* VRML output file */
+
+ gammapweights xweights[14];
+
+ int i;
+
+#if defined(__IBMC__) && defined(_M_IX86)
+ _control87(EM_UNDERFLOW, EM_UNDERFLOW);
+#endif
+
+ error_program = argv[0];
+
+ if (argc < 3)
+ usage();
+
+ /* 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 */
+ }
+ }
+ }
+
+ if (argv[fa][1] == '?')
+ usage();
+
+ /* Verbosity */
+ else if (argv[fa][1] == 'v' || argv[fa][1] == 'V') {
+ verb = 1;
+ }
+
+ /* Smoothing factor */
+ else if (argv[fa][1] == 's' || argv[fa][1] == 'S') {
+ fa = nfa;
+ if (na == NULL) usage();
+ nearf = atof(na);
+ }
+ else
+ usage();
+ } else
+ break;
+ }
+
+ if (fa >= argc || argv[fa][0] == '-') usage();
+ strcpy(in_name,argv[fa++]);
+
+ if (fa >= argc || argv[fa][0] == '-') usage();
+ strcpy(out_name,argv[fa++]);
+
+ if (fa >= argc || argv[fa][0] == '-') usage();
+ strcpy(diag_name,argv[fa++]);
+
+ /* - - - - - - - - - - - - - - - - - - - */
+ /* read the input device gamut */
+
+ gin = new_gamut(0.0, 0, 0);
+
+ if ((xl = strrchr(in_name, '.')) == NULL) { /* Add .gam extention if there isn't one */
+ xl = in_name + strlen(in_name);
+ strcpy(xl,".gam");
+ }
+
+ if (gin->read_gam(gin, in_name))
+ error("Reading input gamut failed");
+
+ /* - - - - - - - - - - - - - - - - - - - */
+ /* read the output device gamut */
+
+ gout = new_gamut(0.0, 0, 0);
+
+ if ((xl = strrchr(out_name, '.')) == NULL) { /* Add .gam extention if there isn't one */
+ xl = out_name + strlen(out_name);
+ strcpy(xl,".gam");
+ }
+
+ if (gout->read_gam(gout, out_name))
+ error("Reading output gamut failed");
+
+ /* - - - - - - - - - - - - - - - - - - - */
+
+ il[0] = ol[0] = 0.0;
+ il[1] = ol[1] = -128.0;
+ il[2] = ol[2] = -128.0;
+ ih[0] = oh[0] = 100.0;
+ ih[1] = oh[1] = 128.0;
+ ih[2] = oh[2] = 128.0;
+
+ /* Convert from compact to explicit hextant weightings */
+ expand_weights(xweights, weights);
+
+ /* Create the near point mapping */
+ nsm = near_smooth(verb, &nnsm, gin, gin, gout, 0, 0, NULL, xweights,
+ 0.1, 0.1, 1, 1, 2.0, 17, 10.0, il, ih, ol, oh);
+ if (nsm == NULL)
+ error("Creating smoothed near points failed");
+
+ /* Output the src to smoothed near point vectors */
+ if ((xl = strrchr(diag_name, '.')) == NULL) { /* Add .wrl extention if there isn't one */
+ xl = diag_name + strlen(diag_name);
+ strcpy(xl,".wrl");
+ }
+
+ wrl = start_vrml(diag_name, 1);
+ start_line_set(wrl);
+
+ for (i = 0; i < nnsm; i++) {
+ add_vertex(wrl, nsm[i].sv); /* Source gamut point */
+ add_vertex(wrl, nsm[i].dv); /* Smoother destination value */
+
+// add_vertex(wrl, nsm[i].drv); /* Radial points */
+ }
+ make_lines(wrl, 2);
+ end_vrml(wrl);
+
+ /* Clean up */
+ free_nearsmth(nsm, nnsm);
+
+ gout->del(gout);
+ gin->del(gin);
+
+ return 0;
+}
+
+/* ------------------------------------------------ */
+/* Some simple functions to do basic VRML work */
+
+#ifndef GAMUT_LCENT
+#define GAMUT_LCENT 50.0
+#endif
+static int npoints = 0;
+static int paloc = 0;
+static struct { double pp[3]; } *pary;
+
+static void Lab2RGB(double *out, double *in);
+
+FILE *start_vrml(char *name, int doaxes) {
+ FILE *wrl;
+ struct {
+ double x, y, z;
+ double wx, wy, wz;
+ double r, g, b;
+ } axes[5] = {
+ { 0, 0, 50-GAMUT_LCENT, 2, 2, 100, .7, .7, .7 }, /* L axis */
+ { 50, 0, 0-GAMUT_LCENT, 100, 2, 2, 1, 0, 0 }, /* +a (red) axis */
+ { 0, -50, 0-GAMUT_LCENT, 2, 100, 2, 0, 0, 1 }, /* -b (blue) axis */
+ { -50, 0, 0-GAMUT_LCENT, 100, 2, 2, 0, 1, 0 }, /* -a (green) axis */
+ { 0, 50, 0-GAMUT_LCENT, 2, 100, 2, 1, 1, 0 }, /* +b (yellow) axis */
+ };
+ int i;
+
+ if ((wrl = fopen(name,"w")) == NULL)
+ error("Error opening VRML file '%s'\n",name);
+
+ npoints = 0;
+
+ fprintf(wrl,"#VRML V2.0 utf8\n");
+ fprintf(wrl,"\n");
+ fprintf(wrl,"# Created by the Argyll CMS\n");
+ fprintf(wrl,"Transform {\n");
+ fprintf(wrl,"children [\n");
+ fprintf(wrl," NavigationInfo {\n");
+ fprintf(wrl," type \"EXAMINE\" # It's an object we examine\n");
+ fprintf(wrl," } # We'll add our own light\n");
+ fprintf(wrl,"\n");
+ fprintf(wrl," DirectionalLight {\n");
+ fprintf(wrl," direction 0 0 -1 # Light illuminating the scene\n");
+ fprintf(wrl," direction 0 -1 0 # Light illuminating the scene\n");
+ fprintf(wrl," }\n");
+ fprintf(wrl,"\n");
+ fprintf(wrl," Viewpoint {\n");
+ fprintf(wrl," position 0 0 340 # Position we view from\n");
+ fprintf(wrl," }\n");
+ fprintf(wrl,"\n");
+ if (doaxes != 0) {
+ fprintf(wrl,"# Lab axes as boxes:\n");
+ for (i = 0; i < 5; i++) {
+ fprintf(wrl,"Transform { translation %f %f %f\n", axes[i].x, axes[i].y, axes[i].z);
+ fprintf(wrl,"\tchildren [\n");
+ fprintf(wrl,"\t\tShape{\n");
+ fprintf(wrl,"\t\t\tgeometry Box { size %f %f %f }\n",
+ axes[i].wx, axes[i].wy, axes[i].wz);
+ fprintf(wrl,"\t\t\tappearance Appearance { material Material ");
+ fprintf(wrl,"{ diffuseColor %f %f %f} }\n", axes[i].r, axes[i].g, axes[i].b);
+ fprintf(wrl,"\t\t}\n");
+ fprintf(wrl,"\t]\n");
+ fprintf(wrl,"}\n");
+ }
+ fprintf(wrl,"\n");
+ }
+
+ return wrl;
+}
+
+void
+start_line_set(FILE *wrl) {
+
+ fprintf(wrl,"\n");
+ fprintf(wrl,"Shape {\n");
+ fprintf(wrl," geometry IndexedLineSet { \n");
+ fprintf(wrl," coord Coordinate { \n");
+ fprintf(wrl," point [\n");
+}
+
+void add_vertex(FILE *wrl, double pp[3]) {
+
+ fprintf(wrl,"%f %f %f,\n",pp[1], pp[2], pp[0]-GAMUT_LCENT);
+
+ if (paloc < (npoints+1)) {
+ paloc = (paloc + 10) * 2;
+ if (pary == NULL)
+ pary = malloc(paloc * 3 * sizeof(double));
+ else
+ pary = realloc(pary, paloc * 3 * sizeof(double));
+
+ if (pary == NULL)
+ error ("Malloc failed");
+ }
+ pary[npoints].pp[0] = pp[0];
+ pary[npoints].pp[1] = pp[1];
+ pary[npoints].pp[2] = pp[2];
+ npoints++;
+}
+
+
+void make_lines(FILE *wrl, int ppset) {
+ int i, j;
+
+ fprintf(wrl," ]\n");
+ fprintf(wrl," }\n");
+ fprintf(wrl," coordIndex [\n");
+
+ for (i = 0; i < npoints;) {
+ for (j = 0; j < ppset; j++, i++) {
+ fprintf(wrl,"%d, ", i);
+ }
+ fprintf(wrl,"-1,\n");
+ }
+ fprintf(wrl," ]\n");
+
+ /* Color */
+ fprintf(wrl," colorPerVertex TRUE\n");
+ fprintf(wrl," color Color {\n");
+ fprintf(wrl," color [ # RGB colors of each vertex\n");
+
+ for (i = 0; i < npoints; i++) {
+ double rgb[3], Lab[3];
+ Lab[0] = pary[i].pp[0];
+ Lab[1] = pary[i].pp[1];
+ Lab[2] = pary[i].pp[2];
+ Lab2RGB(rgb, Lab);
+ fprintf(wrl," %f %f %f,\n", rgb[0], rgb[1], rgb[2]);
+ }
+ fprintf(wrl," ] \n");
+ fprintf(wrl," }\n");
+ /* End color */
+
+ fprintf(wrl," }\n");
+ fprintf(wrl,"} # end shape\n");
+
+}
+
+void end_vrml(FILE *wrl) {
+
+ fprintf(wrl,"\n");
+ fprintf(wrl," ] # end of children for world\n");
+ fprintf(wrl,"}\n");
+
+ if (fclose(wrl) != 0)
+ error("Error closing VRML file\n");
+}
+
+
+/* Convert a gamut Lab value to an RGB value for display purposes */
+static void
+Lab2RGB(double *out, double *in) {
+ double L = in[0], a = in[1], b = in[2];
+ double x,y,z,fx,fy,fz;
+ double R, G, B;
+
+ /* Scale so that black is visible */
+ L = L * (100 - 40.0)/100.0 + 40.0;
+
+ /* First convert to XYZ using D50 white point */
+ if (L > 8.0) {
+ fy = (L + 16.0)/116.0;
+ y = pow(fy,3.0);
+ } else {
+ y = L/903.2963058;
+ fy = 7.787036979 * y + 16.0/116.0;
+ }
+
+ fx = a/500.0 + fy;
+ if (fx > 24.0/116.0)
+ x = pow(fx,3.0);
+ else
+ x = (fx - 16.0/116.0)/7.787036979;
+
+ fz = fy - b/200.0;
+ if (fz > 24.0/116.0)
+ z = pow(fz,3.0);
+ else
+ z = (fz - 16.0/116.0)/7.787036979;
+
+ x *= 0.9642; /* Multiply by white point, D50 */
+ y *= 1.0;
+ z *= 0.8249;
+
+ /* Now convert to sRGB values */
+ R = x * 3.2410 + y * -1.5374 + z * -0.4986;
+ G = x * -0.9692 + y * 1.8760 + z * 0.0416;
+ B = x * 0.0556 + y * -0.2040 + z * 1.0570;
+
+ if (R < 0.0)
+ R = 0.0;
+ else if (R > 1.0)
+ R = 1.0;
+
+ if (G < 0.0)
+ G = 0.0;
+ else if (G > 1.0)
+ G = 1.0;
+
+ if (B < 0.0)
+ B = 0.0;
+ else if (B > 1.0)
+ B = 1.0;
+
+ R = pow(R, 1.0/2.2);
+ G = pow(G, 1.0/2.2);
+ B = pow(B, 1.0/2.2);
+
+ out[0] = R;
+ out[1] = G;
+ out[2] = B;
+}
+
+