src/xpm/rgb.c

/*
 * Copyright (C) 1989-95 GROUPE BULL
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to
 * deal in the Software without restriction, including without limitation the
 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
 * sell copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * GROUPE BULL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 * Except as contained in this notice, the name of GROUPE BULL shall not be
 * used in advertising or otherwise to promote the sale, use or other dealings
 * in this Software without prior written authorization from GROUPE BULL.
 */

/*****************************************************************************\
* rgb.c:                                                                      *
*                                                                             *
*  XPM library                                                                *
*  Rgb file utilities                                                         *
*                                                                             *
*  Developed by Arnaud Le Hors                                                *
\*****************************************************************************/

/*
 * The code related to FOR_MSW has been added by
 * HeDu (hedu@cul-ipn.uni-kiel.de) 4/94
 */

/*
 * Part of this code has been taken from the ppmtoxpm.c file written by Mark
 * W. Snitily but has been modified for my special need
 */

#include "XpmI.h"
#include <ctype.h>

#ifndef FOR_MSW				/* normal part first, MSW part at
					 * the end, (huge ifdef!) */
/*
 * Read a rgb text file.  It stores the rgb values (0->65535)
 * and the rgb mnemonics (malloc'ed) into the "rgbn" array.  Returns the
 * number of entries stored.
 */
int
xpmReadRgbNames(rgb_fname, rgbn)
    char *rgb_fname;
    xpmRgbName rgbn[];

{
    FILE *rgbf;
    int n, items, red, green, blue;
    char line[512], name[512], *rgbname, *s1, *s2;
    xpmRgbName *rgb;

    /* Open the rgb text file.  Abort if error. */
    if ((rgbf = fopen(rgb_fname, "r")) == NULL)
	return 0;

    /* Loop reading each line in the file. */
    n = 0;
    rgb = rgbn;
    /* Quit if rgb text file has too many entries. */
    while (fgets(line, sizeof(line), rgbf) && n < MAX_RGBNAMES) {

	/* Skip silently if line is bad. */
	items = sscanf(line, "%d %d %d %[^\n]\n", &red, &green, &blue, name);
	if (items != 4)
	    continue;

	/*
	 * Make sure rgb values are within 0->255 range. Skip silently if
	 * bad.
	 */
	if (red < 0 || red > 0xFF ||
	    green < 0 || green > 0xFF ||
	    blue < 0 || blue > 0xFF)
	    continue;

	/* Allocate memory for ascii name. If error give up here. */
	if (!(rgbname = (char *) XpmMalloc(strlen(name) + 1)))
	    break;

	/* Copy string to ascii name and lowercase it. */
	for (s1 = name, s2 = rgbname; *s1; s1++)
	    *s2++ = tolower(*s1);
	*s2 = '\0';

	/* Save the rgb values and ascii name in the array. */
	rgb->r = red * 257;		/* 65535/255 = 257 */
	rgb->g = green * 257;
	rgb->b = blue * 257;
	rgb->name = rgbname;
	rgb++;
	n++;
    }

    fclose(rgbf);

    /* Return the number of read rgb names. */
    return n < 0 ? 0 : n;
}

/*
 * Return the color name corresponding to the given rgb values
 */
char *
xpmGetRgbName(rgbn, rgbn_max, red, green, blue)
    xpmRgbName rgbn[];			/* rgb mnemonics from rgb text file */
    int rgbn_max;			/* number of rgb mnemonics in table */
    int red, green, blue;		/* rgb values */

{
    int i;
    xpmRgbName *rgb;

    /*
     * Just perform a dumb linear search over the rgb values of the color
     * mnemonics.  One could speed things up by sorting the rgb values and
     * using a binary search, or building a hash table, etc...
     */
    for (i = 0, rgb = rgbn; i < rgbn_max; i++, rgb++)
	if (red == rgb->r && green == rgb->g && blue == rgb->b)
	    return rgb->name;

    /* if not found return NULL */
    return NULL;
}

/*
 * Free the strings which have been malloc'ed in xpmReadRgbNames
 */
void
xpmFreeRgbNames(rgbn, rgbn_max)
    xpmRgbName rgbn[];
    int rgbn_max;

{
    int i;
    xpmRgbName *rgb;

    for (i = 0, rgb = rgbn; i < rgbn_max; i++, rgb++)
	XpmFree(rgb->name);
}

#else					/* here comes the MSW part, the
					 * second part of the  huge ifdef */

#include "rgbtab.h"			/* hard coded rgb.txt table */

#ifdef __OS2__
/* Visual Age cannot deal with old, non-ansi, code */
int xpmReadRgbNames(char* rgb_fname, xpmRgbName rgbn[])
#else
int
xpmReadRgbNames(rgb_fname, rgbn)
    char *rgb_fname;
    xpmRgbName rgbn[];
#endif
{
    /*
     * check for consistency???
     * table has to be sorted for calls on strcasecmp
     */
    return (numTheRGBRecords);
}

/*
 * MSW rgb values are made from 3 BYTEs, this is different from X XColor.red,
 * which has something like #0303 for one color
 */
#ifdef __OS2__
/* Visual Age cannot deal with old, non-ansi, code */
char* xpmGetRgbName(xpmRgbName rgbn[], int rgbn_max, int red, int green, int blue)
#else
char *
xpmGetRgbName(rgbn, rgbn_max, red, green, blue)
    xpmRgbName rgbn[];			/* rgb mnemonics from rgb text file
					 * not used */
    int rgbn_max;			/* not used */
    int red, green, blue;		/* rgb values */
#endif
{
    int i;
    unsigned long rgbVal;

    i = 0;
    while (i < numTheRGBRecords) {
	rgbVal = theRGBRecords[i].rgb;
	if (GetRValue(rgbVal) == red &&
	    GetGValue(rgbVal) == green &&
	    GetBValue(rgbVal) == blue)
	    return (theRGBRecords[i].name);
	i++;
    }
    return (NULL);
}

/* used in XParseColor in simx.c */
#ifdef __OS2__
/* Visual Age cannot deal with old, non-ansi, code */
int xpmGetRGBfromName(char* inname, int* r, int* g, int* b)
#else
int
xpmGetRGBfromName(inname, r, g, b)
    char *inname;
    int *r, *g, *b;
#endif
{
    int left, right, middle;
    int cmp;
    unsigned long rgbVal;
    char *name;
    char *grey, *p;

    name = xpmstrdup(inname);

    /*
     * the table in rgbtab.c has no names with spaces, and no grey, but a
     * lot of gray
     */
    /* so first extract ' ' */
    while (p = strchr(name, ' ')) {
	while (*(p)) {			/* till eof of string */
	    *p = *(p + 1);		/* copy to the left */
	    p++;
	}
    }
    /* fold to lower case */
    p = name;
    while (*p) {
	*p = tolower(*p);
	p++;
    }

    /*
     * substitute Grey with Gray, else rgbtab.h would have more than 100
     * 'duplicate' entries
     */
    if (grey = strstr(name, "grey"))
	grey[2] = 'a';

    /* binary search */
    left = 0;
    right = numTheRGBRecords - 1;
    do {
	middle = (left + right) / 2;
	cmp = xpmstrcasecmp(name, theRGBRecords[middle].name);
	if (cmp == 0) {
	    rgbVal = theRGBRecords[middle].rgb;
	    *r = GetRValue(rgbVal);
	    *g = GetGValue(rgbVal);
	    *b = GetBValue(rgbVal);
	    free(name);
	    return (1);
	} else if (cmp < 0) {
	    right = middle - 1;
	} else {			/* > 0 */
	    left = middle + 1;
	}
    } while (left <= right);

    /*
     * I don't like to run in a ColorInvalid error and to see no pixmap at
     * all, so simply return a red pixel. Should be wrapped in an #ifdef
     * HeDu
     */

    *r = 255;
    *g = 0;
    *b = 0;				/* red error pixel */

    free(name);
    return (1);
}

#ifdef __OS2__
/* Visual Age cannot deal with old, non-ansi, code */
void xpmFreeRgbNames(xpmRgbName rgbn[], int rgbn_max)
#else
void
xpmFreeRgbNames(rgbn, rgbn_max)
    xpmRgbName rgbn[];
    int rgbn_max;
#endif
{
    /* nothing to do */
}

#endif					/* MSW part */
Commit	Line	Data
	1	/*
	2	* Copyright (C) 1989-95 GROUPE BULL
	3	*
	4	* Permission is hereby granted, free of charge, to any person obtaining a copy
	5	* of this software and associated documentation files (the "Software"), to
	6	* deal in the Software without restriction, including without limitation the
	7	* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
	8	* sell copies of the Software, and to permit persons to whom the Software is
	9	* furnished to do so, subject to the following conditions:
	10	*
	11	* The above copyright notice and this permission notice shall be included in
	12	* all copies or substantial portions of the Software.
	13	*
	14	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	15	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	16	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
	17	* GROUPE BULL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
	18	* AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
	19	* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
	20	*
	21	* Except as contained in this notice, the name of GROUPE BULL shall not be
	22	* used in advertising or otherwise to promote the sale, use or other dealings
	23	* in this Software without prior written authorization from GROUPE BULL.
	24	*/
	25
	26	/*****************************************************************************\
	27	* rgb.c: *
	28	* *
	29	* XPM library *
	30	* Rgb file utilities *
	31	* *
	32	* Developed by Arnaud Le Hors *
	33	\*****************************************************************************/
	34
	35	/*
	36	* The code related to FOR_MSW has been added by
	37	* HeDu (hedu@cul-ipn.uni-kiel.de) 4/94
	38	*/
	39
	40	/*
	41	* Part of this code has been taken from the ppmtoxpm.c file written by Mark
	42	* W. Snitily but has been modified for my special need
	43	*/
	44
	45	#include "XpmI.h"
	46	#include <ctype.h>
	47
	48	#ifndef FOR_MSW /* normal part first, MSW part at
	49	* the end, (huge ifdef!) */
	50	/*
	51	* Read a rgb text file. It stores the rgb values (0->65535)
	52	* and the rgb mnemonics (malloc'ed) into the "rgbn" array. Returns the
	53	* number of entries stored.
	54	*/
	55	int
	56	xpmReadRgbNames(rgb_fname, rgbn)
	57	char *rgb_fname;
	58	xpmRgbName rgbn[];
	59
	60	{
	61	FILE *rgbf;
	62	int n, items, red, green, blue;
	63	char line[512], name[512], rgbname, s1, *s2;
	64	xpmRgbName *rgb;
	65
	66	/* Open the rgb text file. Abort if error. */
	67	if ((rgbf = fopen(rgb_fname, "r")) == NULL)
	68	return 0;
	69
	70	/* Loop reading each line in the file. */
	71	n = 0;
	72	rgb = rgbn;
	73	/* Quit if rgb text file has too many entries. */
	74	while (fgets(line, sizeof(line), rgbf) && n < MAX_RGBNAMES) {
	75
	76	/* Skip silently if line is bad. */
	77	items = sscanf(line, "%d %d %d %[^\n]\n", &red, &green, &blue, name);
	78	if (items != 4)
	79	continue;
	80
	81	/*
	82	* Make sure rgb values are within 0->255 range. Skip silently if
	83	* bad.
	84	*/
	85	if (red < 0 \|\| red > 0xFF \|\|
	86	green < 0 \|\| green > 0xFF \|\|
	87	blue < 0 \|\| blue > 0xFF)
	88	continue;
	89
	90	/* Allocate memory for ascii name. If error give up here. */
	91	if (!(rgbname = (char *) XpmMalloc(strlen(name) + 1)))
	92	break;
	93
	94	/* Copy string to ascii name and lowercase it. */
	95	for (s1 = name, s2 = rgbname; *s1; s1++)
	96	s2++ = tolower(s1);
	97	*s2 = '\0';
	98
	99	/* Save the rgb values and ascii name in the array. */
	100	rgb->r = red * 257; /* 65535/255 = 257 */
	101	rgb->g = green * 257;
	102	rgb->b = blue * 257;
	103	rgb->name = rgbname;
	104	rgb++;
	105	n++;
	106	}
	107
	108	fclose(rgbf);
	109
	110	/* Return the number of read rgb names. */
	111	return n < 0 ? 0 : n;
	112	}
	113
	114	/*
	115	* Return the color name corresponding to the given rgb values
	116	*/
	117	char *
	118	xpmGetRgbName(rgbn, rgbn_max, red, green, blue)
	119	xpmRgbName rgbn[]; /* rgb mnemonics from rgb text file */
	120	int rgbn_max; /* number of rgb mnemonics in table */
	121	int red, green, blue; /* rgb values */
	122
	123	{
	124	int i;
	125	xpmRgbName *rgb;
	126
	127	/*
	128	* Just perform a dumb linear search over the rgb values of the color
	129	* mnemonics. One could speed things up by sorting the rgb values and
	130	* using a binary search, or building a hash table, etc...
	131	*/
	132	for (i = 0, rgb = rgbn; i < rgbn_max; i++, rgb++)
	133	if (red == rgb->r && green == rgb->g && blue == rgb->b)
	134	return rgb->name;
	135
	136	/* if not found return NULL */
	137	return NULL;
	138	}
	139
	140	/*
	141	* Free the strings which have been malloc'ed in xpmReadRgbNames
	142	*/
	143	void
	144	xpmFreeRgbNames(rgbn, rgbn_max)
	145	xpmRgbName rgbn[];
	146	int rgbn_max;
	147
	148	{
	149	int i;
	150	xpmRgbName *rgb;
	151
	152	for (i = 0, rgb = rgbn; i < rgbn_max; i++, rgb++)
	153	XpmFree(rgb->name);
	154	}
	155
	156	#else /* here comes the MSW part, the
	157	* second part of the huge ifdef */
	158
	159	#include "rgbtab.h" /* hard coded rgb.txt table */
	160
	161	#ifdef __OS2__
	162	/* Visual Age cannot deal with old, non-ansi, code */
	163	int xpmReadRgbNames(char* rgb_fname, xpmRgbName rgbn[])
	164	#else
	165	int
	166	xpmReadRgbNames(rgb_fname, rgbn)
	167	char *rgb_fname;
	168	xpmRgbName rgbn[];
	169	#endif
	170	{
	171	/*
	172	* check for consistency???
	173	* table has to be sorted for calls on strcasecmp
	174	*/
	175	return (numTheRGBRecords);
	176	}
	177
	178	/*
	179	* MSW rgb values are made from 3 BYTEs, this is different from X XColor.red,
	180	* which has something like #0303 for one color
	181	*/
	182	#ifdef __OS2__
	183	/* Visual Age cannot deal with old, non-ansi, code */
	184	char* xpmGetRgbName(xpmRgbName rgbn[], int rgbn_max, int red, int green, int blue)
	185	#else
	186	char *
	187	xpmGetRgbName(rgbn, rgbn_max, red, green, blue)
	188	xpmRgbName rgbn[]; /* rgb mnemonics from rgb text file
	189	* not used */
	190	int rgbn_max; /* not used */
	191	int red, green, blue; /* rgb values */
	192	#endif
	193	{
	194	int i;
	195	unsigned long rgbVal;
	196
	197	i = 0;
	198	while (i < numTheRGBRecords) {
	199	rgbVal = theRGBRecords[i].rgb;
	200	if (GetRValue(rgbVal) == red &&
	201	GetGValue(rgbVal) == green &&
	202	GetBValue(rgbVal) == blue)
	203	return (theRGBRecords[i].name);
	204	i++;
	205	}
	206	return (NULL);
	207	}
	208
	209	/* used in XParseColor in simx.c */
	210	#ifdef __OS2__
	211	/* Visual Age cannot deal with old, non-ansi, code */
	212	int xpmGetRGBfromName(char* inname, int* r, int* g, int* b)
	213	#else
	214	int
	215	xpmGetRGBfromName(inname, r, g, b)
	216	char *inname;
	217	int r, g, *b;
	218	#endif
	219	{
	220	int left, right, middle;
	221	int cmp;
	222	unsigned long rgbVal;
	223	char *name;
	224	char grey, p;
	225
	226	name = xpmstrdup(inname);
	227
	228	/*
	229	* the table in rgbtab.c has no names with spaces, and no grey, but a
	230	* lot of gray
	231	*/
	232	/* so first extract ' ' */
	233	while (p = strchr(name, ' ')) {
	234	while ((p)) { / till eof of string */
	235	p = (p + 1); /* copy to the left */
	236	p++;
	237	}
	238	}
	239	/* fold to lower case */
	240	p = name;
	241	while (*p) {
	242	p = tolower(p);
	243	p++;
	244	}
	245
	246	/*
	247	* substitute Grey with Gray, else rgbtab.h would have more than 100
	248	* 'duplicate' entries
	249	*/
	250	if (grey = strstr(name, "grey"))
	251	grey[2] = 'a';
	252
	253	/* binary search */
	254	left = 0;
	255	right = numTheRGBRecords - 1;
	256	do {
	257	middle = (left + right) / 2;
	258	cmp = xpmstrcasecmp(name, theRGBRecords[middle].name);
	259	if (cmp == 0) {
	260	rgbVal = theRGBRecords[middle].rgb;
	261	*r = GetRValue(rgbVal);
	262	*g = GetGValue(rgbVal);
	263	*b = GetBValue(rgbVal);
	264	free(name);
	265	return (1);
	266	} else if (cmp < 0) {
	267	right = middle - 1;
	268	} else { /* > 0 */
	269	left = middle + 1;
	270	}
	271	} while (left <= right);
	272
	273	/*
	274	* I don't like to run in a ColorInvalid error and to see no pixmap at
	275	* all, so simply return a red pixel. Should be wrapped in an #ifdef
	276	* HeDu
	277	*/
	278
	279	*r = 255;
	280	*g = 0;
	281	b = 0; / red error pixel */
	282
	283	free(name);
	284	return (1);
	285	}
	286
	287	#ifdef __OS2__
	288	/* Visual Age cannot deal with old, non-ansi, code */
	289	void xpmFreeRgbNames(xpmRgbName rgbn[], int rgbn_max)
	290	#else
	291	void
	292	xpmFreeRgbNames(rgbn, rgbn_max)
	293	xpmRgbName rgbn[];
	294	int rgbn_max;
	295	#endif
	296	{
	297	/* nothing to do */
	298	}
	299
	300	#endif /* MSW part */