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-rw-r--r--xicc/fbview.c312
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diff --git a/xicc/fbview.c b/xicc/fbview.c
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+
+/*
+ * International Color Consortium Format Library (icclib)
+ * View the gamut clipping implemented by the bwd profile.
+ *
+ * Author: Graeme W. Gill
+ * Date: 2000/12/8
+ * Version: 1.23
+ *
+ * Copyright 2000 Graeme W. Gill
+ * Please refer to License.txt file for details.
+ */
+
+/* TTBD:
+ *
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdarg.h>
+#include <fcntl.h>
+#include <string.h>
+#include <math.h>
+#include "copyright.h"
+#include "aconfig.h"
+#include "numlib.h"
+#include "icc.h"
+
+#define TRES 43
+
+/* - - - - - - - - - - - - - */
+
+/* Return maximum difference */
+double maxdiff(double in1[3], double in2[3]) {
+ double tt, rv = 0.0;
+ if ((tt = fabs(in1[0] - in2[0])) > rv)
+ rv = tt;
+ if ((tt = fabs(in1[1] - in2[1])) > rv)
+ rv = tt;
+ if ((tt = fabs(in1[2] - in2[2])) > rv)
+ rv = tt;
+ return rv;
+}
+
+/* Return absolute difference */
+double absdiff(double in1[3], double in2[3]) {
+ double tt, rv = 0.0;
+ tt = in1[0] - in2[0];
+ rv += tt * tt;
+ tt = in1[1] - in2[1];
+ rv += tt * tt;
+ tt = in1[2] - in2[2];
+ rv += tt * tt;
+ return sqrt(rv);
+}
+
+/* ---------------------------------------- */
+
+void usage(void) {
+ fprintf(stderr,"View bwd table clipping of an ICC file, , Version %s\n",ARGYLL_VERSION_STR);
+ fprintf(stderr,"Author: Graeme W. Gill, licensed under the AGPL Version 3\n");
+ fprintf(stderr,"usage: fbtest [-v] infile\n");
+ fprintf(stderr," -v verbose\n");
+ exit(1);
+}
+
+int
+main(
+ int argc,
+ char *argv[]
+) {
+ int fa,nfa; /* argument we're looking at */
+ int verb = 0;
+ int doaxes = 0;
+ char in_name[100];
+ char *xl, out_name[100];
+ icmFile *rd_fp;
+ icc *rd_icco;
+ int rv = 0;
+ icColorSpaceSignature ins, outs; /* Type of input and output spaces */
+
+ /* Check variables */
+ int co[4];
+ double in[4], out[4], check[4], temp[4];
+
+ error_program = argv[0];
+
+ if (argc < 2)
+ 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 */
+ }
+ }
+ }
+
+ /* Verbosity */
+ if (argv[fa][1] == 'v' || argv[fa][1] == 'V') {
+ verb = 1;
+ }
+ else if (argv[fa][1] == '?')
+ usage();
+ else
+ usage();
+ }
+ else
+ break;
+ }
+
+ if (fa >= argc || argv[fa][0] == '-') usage();
+ strcpy(in_name,argv[fa]);
+
+ strcpy(out_name, in_name);
+ if ((xl = strrchr(out_name, '.')) == NULL) /* Figure where extention is */
+ xl = out_name + strlen(out_name);
+ strcpy(xl,".wrl");
+
+ /* Open up the file for reading */
+ if ((rd_fp = new_icmFileStd_name(in_name,"r")) == NULL)
+ error ("Read: Can't open file '%s'",in_name);
+
+ if ((rd_icco = new_icc()) == NULL)
+ error ("Read: Creation of ICC object failed");
+
+ /* Read the header and tag list */
+ if ((rv = rd_icco->read(rd_icco,rd_fp,0)) != 0)
+ error ("Read: %d, %s",rv,rd_icco->err);
+
+ /* Run the target Lab values through the bwd and fwd tables, */
+ /* to compute the overall error. */
+ {
+#define GAMUT_LCENT 50.0
+ double merr = 0.0;
+ double aerr = 0.0;
+ double nsamps = 0.0;
+ icmLuBase *luo1, *luo2;
+ 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, j;
+
+
+ /* Get a Device to PCS conversion object */
+ if ((luo1 = rd_icco->get_luobj(rd_icco, icmFwd, icAbsoluteColorimetric, icSigLabData, icmLuOrdNorm)) == NULL) {
+ if ((luo1 = rd_icco->get_luobj(rd_icco, icmFwd, icmDefaultIntent, icSigLabData, icmLuOrdNorm)) == NULL)
+ error ("%d, %s",rd_icco->errc, rd_icco->err);
+ }
+ /* Get details of conversion */
+ luo1->spaces(luo1, &ins, NULL, &outs, NULL, NULL, NULL, NULL, NULL, NULL);
+
+ if (ins != icSigCmykData) {
+ error("Expecting CMYK device");
+ }
+
+ /* Get a PCS to Device conversion object */
+ if ((luo2 = rd_icco->get_luobj(rd_icco, icmBwd, icAbsoluteColorimetric,
+ icSigLabData, icmLuOrdNorm)) == NULL) {
+ if ((luo2 = rd_icco->get_luobj(rd_icco, icmBwd, icmDefaultIntent,
+ icSigLabData, icmLuOrdNorm)) == NULL)
+ error ("%d, %s",rd_icco->errc, rd_icco->err);
+ }
+
+ if ((wrl = fopen(out_name,"w")) == NULL) {
+ fprintf(stderr,"Error opening output file '%s'\n",out_name);
+ return 2;
+ }
+
+ /* Spit out a VRML 2 Object surface of gamut */
+
+ 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");
+ }
+
+ fprintf(wrl,"\n");
+ fprintf(wrl,"Shape {\n");
+ fprintf(wrl," geometry IndexedLineSet { \n");
+ fprintf(wrl," coord Coordinate { \n");
+ fprintf(wrl," point [\n");
+
+ i = 0;
+// for (co[0] = 0; co[0] < TRES; co[0]++) {
+ for (co[1] = 0; co[1] < TRES; co[1]++) {
+ for (co[2] = 0; co[2] < TRES; co[2]++) {
+ int rv1, rv2;
+ double mxd, absd;
+
+// temp[0] = co[0]/(TRES-1.0);
+ temp[1] = co[1]/(TRES-1.0);
+ temp[2] = co[2]/(TRES-1.0);
+
+// in[0] = temp[0] * 100.0;
+ in[0] = 0.0;
+ in[1] = 200.0 * temp[1] -100.0;
+ in[2] = 200.0 * temp[2] -100.0;
+
+
+ /* PCS -> Device */
+ if ((rv2 = luo2->lookup(luo2, out, in)) > 1)
+ error ("%d, %s",rd_icco->errc,rd_icco->err);
+
+ /* Device -> PCS */
+ if ((rv1 = luo1->lookup(luo1, check, out)) > 1)
+ error ("%d, %s",rd_icco->errc,rd_icco->err);
+
+ if (verb) {
+ printf("%f %f %f -> %f %f %f %f -> %f %f %f [%f]\n",
+ in[0],in[1],in[2],out[0],out[1],out[2],out[3],check[0],check[1],check[2],
+ maxdiff(check, in));
+ }
+
+ /* Check the result */
+ mxd = maxdiff(check, in);
+ if (mxd > merr)
+ merr = mxd;
+
+ nsamps++;
+ absd = absdiff(check, in);
+ aerr += absd;
+
+ if (absd > 3.0) {
+ fprintf(wrl,"%f %f %f,\n",in[1], in[2], in[0]-GAMUT_LCENT);
+ fprintf(wrl,"%f %f %f,\n",check[1], check[2], check[0]-GAMUT_LCENT);
+ i++;
+ }
+ }
+ }
+// }
+
+ fprintf(wrl," ]\n");
+ fprintf(wrl," }\n");
+ fprintf(wrl," coordIndex [\n");
+
+ for (j = 0; j < i; j++) {
+ fprintf(wrl,"%d, %d, -1,\n", j * 2, j * 2 + 1);
+ }
+ fprintf(wrl," ]\n");
+ fprintf(wrl," }\n");
+ fprintf(wrl,"} # end shape\n");
+
+ fprintf(wrl,"\n");
+ fprintf(wrl," ] # end of children for world\n");
+ fprintf(wrl,"}\n");
+
+ if (fclose(wrl) != 0) {
+ fprintf(stderr,"Error closing output file '%s'\n",out_name);
+ return 2;
+ }
+
+ printf("bwd to fwd check complete, peak err = %f, avg err = %f\n",merr,aerr/nsamps);
+
+ /* Done with lookup object */
+ luo1->del(luo1);
+ luo2->del(luo2);
+ }
+
+ rd_icco->del(rd_icco);
+ rd_fp->del(rd_fp);
+
+ return 0;
+}
+
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