void
proc_str (PLStream *pls, EscText *args)
{
PLFLT *t = args->xform;
PLFLT a1, alpha, ft_ht, angle, ref;
PLDev *dev = (PLDev *) pls->dev;
PLINT clxmin, clxmax, clymin, clymax;
int jst, font;
/* font height */
ft_ht = pls->chrht * 72.0/25.4; /* ft_ht in points. ht is in mm */
/* calculate baseline text angle */
angle = pls->diorot * 90.;
a1 = acos(t[0]) * 180. / PI;
if (t[2] > 0.)
alpha = a1 - angle;
else
alpha = 360. - a1 - angle;
alpha = alpha * PI / 180.;
/* TODO: parse string for format (escape) characters */
/* parse_str(args->string, return_string);*/
/* apply transformations */
difilt(&args->x, &args->y, 1, &clxmin, &clxmax, &clymin, &clymax);
/* check clip limits. For now, only the reference point of the string is checked;
but the the whole string should be checked -- using a postscript construct
such as gsave/clip/grestore. This method can also be applied to the xfig and
pstex drivers. Zoom side effect: the font size must be adjusted! */
if ( args->x < clxmin || args->x > clxmax || args->y < clymin || args->y > clymax)
return;
/*
* Text justification. Left, center and right justification, which
* are the more common options, are supported; variable justification is
* only approximate, based on plplot computation of it's string lenght
*/
if (args->just == 0.5)
jst = 1; /* center */
else if (args->just == 1.)
jst = 2; /* right */
else {
jst = 0; /* left */
args->x = args->refx; /* use hints provided by plplot */
args->y = args->refy;
}
/*
* Reference point (center baseline of string, not latex character reference point).
* If base = 0, it is aligned with the center of the text box
* If base = 1, it is aligned with the baseline of the text box
* If base = 2, it is aligned with the top of the text box
* Currently plplot only uses base=0
* xfig use base=1
*/
if (args->base == 2) /* not supported by plplot */
ref = - DPI/72. * ft_ht / 2.; /* half font height in xfig unities (1/1200 inches) */
else if (args->base == 1)
ref = 0.;
else
ref = DPI/72. * ft_ht / 2.;
/* rotate point in xfig is lower left corner, compensate */
args->y = offset + dev->ymax * (int)dev->xscale_dev - (args->y - ref*cos(alpha));
args->x = args->x + ref*sin(alpha);
/*
* font family, serie and shape. Currently not supported by plplot
*
* Use Postscript Times
* 1: Normal font
* 2: Roman font
* 3: Italic font
* 4: sans serif
*/
switch (pls->cfont) {
case (1): font = 0; break;
case (2): font = 1; break;
case (3): font = 3; break;
case (4): font = 4; break;
default: font = 0;
}
fprintf(pls->OutFile,"4 %d %d 50 0 %d %f %f 4 1 1 %d %d %s\\001\n",
jst, curcol, font, 1.8 /*!*/ * ft_ht, alpha, args->x, args->y, args->string);
}
void
proc_str (PLStream *pls, EscText *args)
{
PLFLT *t = args->xform, tt[4]; /* Transform matrices */
PLFLT theta; /* Rotation angle and shear from the matrix */
PLFLT ft_ht, offset; /* Font height and offset */
PLFLT cs,sn,l1,l2;
PSDev *dev = (PSDev *) pls->dev;
char *font, esc;
/* Be generous. Used to store lots of font changes which take
* 3 characters per change.*/
#define PROC_STR_STRING_LENGTH 1000
unsigned char *strp, str[PROC_STR_STRING_LENGTH], *cur_strp,
cur_str[PROC_STR_STRING_LENGTH];
float font_factor = 1.4;
PLINT clxmin, clxmax, clymin, clymax; /* Clip limits */
PLINT clipx[4],clipy[4]; /* Current clip limits */
PLFLT scale = 1., up = 0.; /* Font scaling and shifting parameters */
int i=0; /* String index */
short text_len;
/* unicode only! so test for it. */
if (args->unicode_array_len>0)
{
int j,s,f;
char *fonts[PROC_STR_STRING_LENGTH];
int nlookup;
const Unicode_to_Type1_table *lookup;
const PLUNICODE *cur_text;
const PLUNICODE *cur_text_limit;
PLUNICODE fci;
/* translate from unicode into type 1 font index. */
/*
* Choose the font family, style, variant, and weight using
* the FCI (font characterization integer).
*/
plgesc(&esc);
plgfci(&fci);
font = plP_FCI2FontName(fci, Type1Lookup, N_Type1Lookup);
if (font == NULL) {
fprintf(stderr, "fci = 0x%x, font name pointer = NULL \n", fci);
plabort("proc_str: FCI inconsistent with Type1Lookup; "
"internal PLplot error");
return;
}
/*pldebug("proc_str", "fci = 0x%x, font name = %s\n", fci, font);*/
if (!strcmp(font, "Symbol")) {
nlookup = number_of_entries_in_unicode_to_symbol_table;
lookup = unicode_to_symbol_lookup_table;
}
else {
nlookup = number_of_entries_in_unicode_to_standard_table;
lookup = unicode_to_standard_lookup_table;
}
cur_text = args->unicode_array;
for (f=s=j=0; j < args->unicode_array_len; j++) {
if (cur_text[j] & PL_FCI_MARK) {
/* process an FCI by saving it and escaping cur_str
* with an escff to make it a 2-character escape
* that is not used in legacy Hershey code
*/
if ((f < PROC_STR_STRING_LENGTH) && (s+3 < PROC_STR_STRING_LENGTH)) {
fonts[f] = plP_FCI2FontName(cur_text[j], Type1Lookup, N_Type1Lookup);
if (fonts[f] == NULL) {
fprintf(stderr, "string-supplied FCI = 0x%x, font name pointer = NULL \n", cur_text[j]);
plabort("proc_str: string-supplied FCI inconsistent with Type1Lookup;");
return;
}
/*pldebug("proc_str", "string-supplied FCI = 0x%x, font name = %s\n", cur_text[j], fonts[f]);*/
if (!strcmp(fonts[f++], "Symbol")) {
lookup = unicode_to_symbol_lookup_table;
nlookup = number_of_entries_in_unicode_to_symbol_table;
}
else {
lookup = unicode_to_standard_lookup_table;
nlookup = number_of_entries_in_unicode_to_standard_table;
}
cur_str[s++] = esc;
cur_str[s++] = 'f';
cur_str[s++] = 'f';
}
}
else if (s+1 < PROC_STR_STRING_LENGTH) {
cur_str[s++] = plunicode2type1(cur_text[j], lookup, nlookup);
/*pldebug("proc_str", "unicode = 0x%x, type 1 code = %d\n",
cur_text[j], cur_str[j]);*/
}
}
cur_str[s] = '\0';
/* finish previous polyline */
dev->xold = PL_UNDEFINED;
dev->yold = PL_UNDEFINED;
/* Determine the font height */
ft_ht = pls->chrht * 72.0/25.4; /* ft_ht in points, ht is in mm */
/* The transform matrix has only rotations and shears; extract them */
theta = acos(t[0]) * 180. / PI; /* Determine the rotation (in degrees)... */
if (t[2] < 0.) theta *= -1.; /* ... and sign ... */
cs = cos(theta*PI/180.);
sn = sin(theta*PI/180.);
tt[0] = t[0]*cs + t[2]*sn;
tt[1] = t[1]*cs + t[3]*sn;
tt[2] = -t[0]*sn + t[2]*cs;
tt[3] = -t[1]*sn + t[3]*cs;
/*
* Reference point conventions:
* If base = 0, it is aligned with the center of the text box
* If base = 1, it is aligned with the baseline of the text box
* If base = 2, it is aligned with the top of the text box
*
* Currently plplot only uses base=0
* Postscript uses base=1
*
* We must calculate the difference between the two and apply the offset.
*/
if (args->base == 2) /* not supported by plplot */
offset = ENLARGE * ft_ht / 2.; /* half font height */
else if (args->base == 1)
offset = 0.;
else
offset = -ENLARGE * ft_ht / 2.;
args->y += offset*cos(theta*PI/180.);
args->x -= offset*sin(theta*PI/180.);
/* Apply plplot difilt transformations */
difilt(&args->x, &args->y, 1, &clxmin, &clxmax, &clymin, &clymax);
/* ps driver is rotated by default */
plRotPhy(ORIENTATION, dev->xmin, dev->ymin, dev->xmax, dev->ymax,
&(args->x), &(args->y));
/* Determine the adjustment for page orientation */
theta += 90. - 90.*pls->diorot;
/* Output */
/* Set clipping */
clipx[0]=pls->clpxmi;
clipx[2]=pls->clpxma;
clipy[0]=pls->clpymi;
clipy[2]=pls->clpyma;
clipx[1]=clipx[2];
clipy[1]=clipy[0];
clipx[3]=clipx[0];
clipy[3]=clipy[2];
difilt(clipx, clipy, 4, &clxmin, &clxmax, &clymin, &clymax);
plRotPhy(ORIENTATION, dev->xmin, dev->ymin, dev->xmax, dev->ymax,
&clipx[0], &clipy[0]);
plRotPhy(ORIENTATION, dev->xmin, dev->ymin, dev->xmax, dev->ymax,
&clipx[1], &clipy[1]);
plRotPhy(ORIENTATION, dev->xmin, dev->ymin, dev->xmax, dev->ymax,
&clipx[2], &clipy[2]);
plRotPhy(ORIENTATION, dev->xmin, dev->ymin, dev->xmax, dev->ymax,
&clipx[3], &clipy[3]);
fprintf(OF," gsave %d %d %d %d %d %d %d %d CL\n",clipx[0],clipy[0],clipx[1],clipy[1],clipx[2],clipy[2],clipx[3],clipy[3]);
/* move to string reference point */
fprintf(OF, " %d %d M\n", args->x, args->y );
/* Save the current position and set the string rotation */
fprintf(OF, "gsave %.3f R\n",theta);
/* Purge escape sequences from string, so that postscript can find it's
* length. The string length is computed with the current font, and can
* thus be wrong if there are font change escape sequences in the string
*/
esc_purge(str, cur_str);
fprintf(OF, "/%s %.3f SF\n", font,font_factor * ENLARGE * ft_ht);
/* Output string, while escaping the '(', ')' and '\' characters.
* this string is output for measurement purposes only.
*/
fprintf(OF, "%.3f (", - args->just);
while (str[i]!='\0') {
if (str[i]=='(' || str[i]==')' || str[i]=='\\')
fprintf(OF,"\\%c",str[i]);
else
fprintf(OF,"%c",str[i]);
i++;
}
fprintf(OF,") SW\n");
/* Parse string for PLplot escape sequences and print everything out */
cur_strp = cur_str;
f = 0;
do {
strp = str;
if (*cur_strp == esc) {
cur_strp++;
if (*cur_strp == esc) { /* <esc><esc> */
*strp++ = *cur_strp++;
}
else if (*cur_strp == 'f') {
cur_strp++;
if (*cur_strp++ != 'f') {
/* escff occurs because of logic above. But any suffix
* other than "f" should never happen. */
plabort("proc_str, internal PLplot logic error;"
"wrong escf escape sequence");
return;
}
font = fonts[f++];
/*pldebug("proc_str", "string-specified fci = 0x%x, font name = %s\n", fci, font);*/
continue;
}
else switch (*cur_strp++) {
case 'd':
case 'D':
if(up>0.) scale *= 1.25; /* Subscript scaling parameter */
else scale *= 0.8; /* Subscript scaling parameter */
up -= font_factor * ENLARGE * ft_ht / 2.;
break;
case 'u':
case 'U':
if(up<0.) scale *= 1.25; /* Subscript scaling parameter */
else scale *= 0.8; /* Subscript scaling parameter */
up += font_factor * ENLARGE * ft_ht / 2.;
break;
/* ignore the next sequences */
case '+':
case '-':
case 'b':
case 'B':
plwarn("'+', '-', and 'b/B' text escape sequences not processed.");
break;
}
}
/* copy from current to next token, adding a postscript escape
* char '\' if necessary
*/
while(*cur_strp && *cur_strp != esc) {
if (*cur_strp == '(' || *cur_strp == ')' || *cur_strp == '\\')
*strp++ = '\\';
*strp++ = *cur_strp++;
}
*strp = '\0';
if(fabs(up)<0.001) up = 0.; /* Watch out for small differences */
/* Apply the scaling and the shear */
fprintf(OF, "/%s [%.3f %.3f %.3f %.3f 0 0] SF\n",
font,
tt[0]*font_factor * ENLARGE * ft_ht * scale,
tt[2]*font_factor * ENLARGE * ft_ht * scale,
tt[1]*font_factor * ENLARGE * ft_ht * scale,
tt[3]*font_factor * ENLARGE * ft_ht * scale);
/* if up/down escape sequences, save current point and adjust baseline;
* take the shear into account */
if(up!=0.) fprintf(OF, "gsave %.3f %.3f rmoveto\n",up*tt[1],up*tt[3]);
/* print the string */
fprintf(OF, "(%s) show\n", str);
/* back to baseline */
if (up!=0.) fprintf(OF, "grestore (%s) stringwidth rmoveto\n", str);
}while(*cur_strp);
fprintf(OF, "grestore\n");
fprintf(OF, "grestore\n");
/*
* keep driver happy -- needed for background and orientation.
* arghhh! can't calculate it, as I only have the string reference
* point, not its extent!
* Still a hack - but at least it takes into account the string
* length and justification. Character width is assumed to be
* 0.6 * character height. Add on an extra 1.5 * character height
* for safety.
*/
cs = cos(theta/180.*PI);
sn = sin(theta/180.*PI);
l1 = -i*args->just;
l2 = i*(1.-args->just);
/* Factor of 0.6 is an empirical fudge to convert character
* height to average character width */
l1 *= 0.6;
l2 *= 0.6;
dev->llx = MIN(dev->llx, args->x + (MIN(l1*cs,l2*cs)-1.5) * font_factor * ft_ht * ENLARGE );
dev->lly = MIN(dev->lly, args->y + (MIN(l1*sn,l2*sn)-1.5) * font_factor * ft_ht * ENLARGE );
dev->urx = MAX(dev->urx, args->x + (MAX(l1*cs,l2*cs)+1.5) * font_factor * ft_ht * ENLARGE );
dev->ury = MAX(dev->ury, args->y + (MAX(l1*sn,l2*sn)+1.5) * font_factor * ft_ht * ENLARGE );
}
}
