summaryrefslogtreecommitdiff
path: root/icc/mcheck.c
diff options
context:
space:
mode:
Diffstat (limited to 'icc/mcheck.c')
-rw-r--r--icc/mcheck.c541
1 files changed, 541 insertions, 0 deletions
diff --git a/icc/mcheck.c b/icc/mcheck.c
new file mode 100644
index 0000000..9000650
--- /dev/null
+++ b/icc/mcheck.c
@@ -0,0 +1,541 @@
+
+/*
+ * International Color Consortium Format Library (icclib)
+ * Check the device chanel to PCS monotonicity.
+ *
+ * Author: Graeme W. Gill
+ * Date: 2000/12/11
+ * Version: 2.15
+ *
+ * Copyright 2000 - 2012 Graeme W. Gill
+ *
+ * This material is licensed with an "MIT" free use license:-
+ * see the License.txt file in this directory for licensing details.
+ */
+
+/* TTBD:
+ *
+ * Make general device input, not just CMYK
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdarg.h>
+#include <fcntl.h>
+#include <string.h>
+#include <math.h>
+#include "icc.h"
+
+void error(char *fmt, ...), warning(char *fmt, ...);
+
+void usage(void) {
+ fprintf(stderr,"Check device to PCS monotonicity of a CMYK ICC file, V%s\n",ICCLIB_VERSION_STR);
+ fprintf(stderr,"Author: Graeme W. Gill\n");
+ fprintf(stderr,"usage: kcheck [-v] [-w] infile\n");
+ fprintf(stderr," -v verbose\n");
+ fprintf(stderr," -c Check just Cyan monotonicity\n");
+ fprintf(stderr," -m Check just Magenta monotonicity\n");
+ fprintf(stderr," -y Check just Yellow monotonicity\n");
+ fprintf(stderr," -k Check just Black monotonicity\n");
+ fprintf(stderr," -w create VRML visualisation\n");
+ exit(1);
+}
+
+#define MGR 50 /* Maximum grid resolution handled */
+
+
+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 */
+ int verb = 0;
+ int cchan = -1; /* default all */
+ int dovrml = 0;
+ int doaxes = 0;
+ char in_name[500];
+ char out_name[500], *xl;
+ icmFile *rd_fp;
+ icc *wr_icco, *rd_icco; /* Keep object separate */
+ int rv = 0;
+
+ /* Check variables */
+ icmLuBase *luo;
+ icmLuLut *luluto; /* Lookup xLut type object */
+ int gres; /* Grid resolution */
+ icColorSpaceSignature ins, outs; /* Type of input and output spaces */
+ int inn; /* Number of input chanels */
+ icmLuAlgType alg;
+ FILE *wrl;
+ int dx[4]; /* Device index mapping */
+ int chan, cs, ce;
+
+ 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;
+ }
+ /* VRML */
+ else if (argv[fa][1] == 'w' || argv[fa][1] == 'W') {
+ dovrml = 1;
+ }
+ /* Cyan */
+ else if (argv[fa][1] == 'c' || argv[fa][1] == 'C') {
+ cchan = 0;
+ }
+ /* Magenta */
+ else if (argv[fa][1] == 'm' || argv[fa][1] == 'M') {
+ cchan = 1;
+ }
+ /* Yellow */
+ else if (argv[fa][1] == 'y' || argv[fa][1] == 'Y') {
+ cchan = 2;
+ }
+ /* Black */
+ else if (argv[fa][1] == 'k' || argv[fa][1] == 'K') {
+ cchan = 3;
+ }
+ 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);
+
+ /* Get a Device to PCS conversion object */
+ if ((luo = rd_icco->get_luobj(rd_icco, icmFwd, icRelativeColorimetric, icSigLabData, icmLuOrdNorm)) == NULL) {
+ if ((luo = rd_icco->get_luobj(rd_icco, icmFwd, icmDefaultIntent, icSigLabData, icmLuOrdNorm)) == NULL)
+ error ("%d, %s",rd_icco->errc, rd_icco->err);
+ }
+ /* Get details of conversion */
+ luo->spaces(luo, &ins, &inn, &outs, NULL, &alg, NULL, NULL, NULL);
+
+ if (alg != icmLutType) {
+ error("Expecting Lut based profile");
+ }
+
+ if (ins != icSigCmykData) {
+ error("Expecting CMYK device");
+ }
+
+ if (outs != icSigLabData) {
+ error("Expecting Lab PCS");
+ }
+
+ luluto = (icmLuLut *)luo; /* Lookup xLut type object */
+
+ gres = luluto->lut->clutPoints;
+ if (gres > MGR) {
+ error("Can't handle grid resolution greater than %d\n",MGR);
+ }
+
+ if (dovrml) {
+ wrl = start_vrml(out_name, doaxes);
+ start_line_set(wrl);
+ }
+
+ /* For all the device chanels chosen */
+ if (cchan < 0) {
+ cs = 0;
+ ce = inn;
+ } else {
+ cs = cchan;
+ ce = cs + 1;
+ }
+ for (chan = cs; chan < ce; chan++) {
+
+ /* Check the monotonicity of the output for a given device input */
+ int co[4];
+ if (chan == 0) {
+ dx[0] = 1;
+ dx[1] = 2;
+ dx[2] = 3;
+ dx[3] = 0; /* Cyan is variable */
+ } else if (chan == 1) {
+ dx[0] = 0;
+ dx[1] = 2;
+ dx[2] = 3;
+ dx[3] = 1; /* Magenta is variable */
+ } else if (chan == 2) {
+ dx[0] = 0;
+ dx[1] = 1;
+ dx[2] = 3;
+ dx[3] = 2; /* Yellow is variable */
+ } else if (chan == 3) {
+ dx[0] = 0;
+ dx[1] = 1;
+ dx[2] = 2;
+ dx[3] = 3; /* Black is variable */
+ }
+
+ /* Itterate throught the CMY clut grid points */
+ for (co[0] = 0; co[0] < gres; co[0]++) {
+ for (co[1] = 0; co[1] < gres; co[1]++) {
+ for (co[2] = 0; co[2] < gres; co[2]++) {
+ int j, k, ck, nm;
+ double dev[MGR][4];
+ double pcs[MGR][3];
+ double apcs[3], ss;
+
+ /* Run up the variable axis */
+ for (ck = 0; ck < gres; ck++) {
+
+ dev[ck][dx[0]] = co[0]/(gres-1.0);
+ dev[ck][dx[1]] = co[1]/(gres-1.0);
+ dev[ck][dx[2]] = co[2]/(gres-1.0);
+ dev[ck][dx[3]] = ck/(gres-1.0);
+
+ /* Device to PCS */
+ if ((rv = luluto->clut(luluto, pcs[ck], dev[ck])) > 1)
+ error ("%d, %s",rd_icco->errc,rd_icco->err);
+
+// if (dovrml)
+// add_vertex(wrl, pcs[ck]);
+ }
+
+ /* Compute average vector direction */
+ for (ss = 0.0, k = 0; k < 3; k++) {
+ double tt;
+ tt = pcs[gres-1][k] - pcs[0][k];
+ ss += tt * tt;
+ apcs[k] = tt;
+ }
+ for (k = 0; k < 3; k++)
+ apcs[k] /= ss;
+
+ /* Now compute the dot product for each vector, */
+ /* and check for reversals. */
+ j = 0;
+//printf("Checking CMYK %f %f %f %f Lab %f %f %f\n",
+// dev[j][0], dev[j][1], dev[j][2], dev[j][3],
+// pcs[j][0], pcs[j][1], pcs[j][2]);
+ for (nm = 0, j = 1; j < gres; j++) {
+ for (ss = 0.0, k = 0; k < 3; k++) /* Dot product */
+ ss += (pcs[j][k] - pcs[j-1][k]) * apcs[k];
+
+//printf("Checking %f CMYK %f %f %f %f Lab %f %f %f\n",
+// ss, dev[j][0], dev[j][1], dev[j][2], dev[j][3],
+// pcs[j][0], pcs[j][1], pcs[j][2]);
+
+ if (ss <= 0.0) {
+ nm = 1;
+ printf("NonMon %f at CMYK %f %f %f %f Lab %f %f %f\n",
+ ss, dev[j][0], dev[j][1], dev[j][2], dev[j][3],
+ pcs[j][0], pcs[j][1], pcs[j][2]);
+ }
+ }
+//printf("\n");
+
+ /* Display just the non mono threads */
+ if (nm && dovrml) {
+ for (j = 0; j < gres; j++)
+ add_vertex(wrl, pcs[j]);
+ }
+ if (verb) {
+ printf("."); fflush(stdout);
+ }
+ }
+ }
+ }
+ }
+
+ if (dovrml) {
+ make_lines(wrl, gres);
+ end_vrml(wrl);
+ }
+
+ /* Done with lookup object */
+ luo->del(luo);
+
+ rd_icco->del(rd_icco);
+ rd_fp->del(rd_fp);
+
+ return 0;
+}
+
+/* ------------------------------------------------ */
+/* Some simple functions to do basix VRML work */
+
+#define GAMUT_LCENT 50.0
+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;
+}
+
+
+/* ------------------------------------------------ */
+/* Basic printf type error() and warning() routines */
+
+void
+error(char *fmt, ...)
+{
+ va_list args;
+
+ fprintf(stderr,"icctest: Error - ");
+ va_start(args, fmt);
+ vfprintf(stderr, fmt, args);
+ va_end(args);
+ fprintf(stderr, "\n");
+ exit (-1);
+}
+
+void
+warning(char *fmt, ...)
+{
+ va_list args;
+
+ fprintf(stderr,"icctest: Warning - ");
+ va_start(args, fmt);
+ vfprintf(stderr, fmt, args);
+ va_end(args);
+ fprintf(stderr, "\n");
+}