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svg.c
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svg.c
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/*----------------------------------------------------------------------*/
/* svg.c */
/* Copyright (c) 2009 Tim Edwards, Open Circuit Design */
/*----------------------------------------------------------------------*/
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#ifndef XC_WIN32
#include <unistd.h>
#endif
#include <math.h>
#include <limits.h>
#include <sys/stat.h>
#ifndef XC_WIN32
#include <sys/wait.h>
#else
#include <process.h>
#endif
#ifndef _MSC_VER
#include <X11/Intrinsic.h>
#include <X11/StringDefs.h>
#endif
#ifndef HAVE_VFORK
#define vfork fork
#endif
/*----------------------------------------------------------------------*/
/* Local includes */
/*----------------------------------------------------------------------*/
#ifdef TCL_WRAPPER
#include <tk.h>
#endif
#include "colordefs.h"
#include "xcircuit.h"
/*----------------------------------------------------------------------*/
/* Function prototype declarations */
/*----------------------------------------------------------------------*/
#include "prototypes.h"
void SVGDrawString(labelptr, int, objinstptr);
/*----------------------------------------------------------------------*/
/* External Variable definitions */
/*----------------------------------------------------------------------*/
extern Display *dpy;
extern Pixmap STIPPLE[8];
extern XCWindowData *areawin;
extern Globaldata xobjs;
extern colorindex *colorlist;
extern int number_colors;
extern fontinfo *fonts;
extern short fontcount;
/*----------------------------------------------------------------------*/
/* The output file is a global variable used by all routines. */
/*----------------------------------------------------------------------*/
FILE *svgf;
/*----------------------------------------------------------------------*/
/*----------------------------------------------------------------------*/
void svg_printcolor(int passcolor, char *prefix)
{
if ((passcolor < number_colors) && (passcolor != DEFAULTCOLOR)) {
fprintf(svgf, "%s\"#%02x%02x%02x\" ",
prefix,
(colorlist[passcolor].color.red >> 8),
(colorlist[passcolor].color.green >> 8),
(colorlist[passcolor].color.blue >> 8));
}
}
/*----------------------------------------------------------------------*/
/* Since we can't do stipples in SVG, and since the whole stipple thing */
/* was only put in because we can't (easily) do transparency effects */
/* in X11, we convert stipples to transparency when the stipple is a */
/* mask, and do a color blend with white when the stipple is opaque. */
/* */
/* Blend amount is 1 (almost original color) to 7 (almost white) */
/*----------------------------------------------------------------------*/
void svg_blendcolor(int passcolor, char *prefix, int amount)
{
int i, bred, bgreen, bblue;
if (passcolor != DEFAULTCOLOR) {
for (i = 0; i < number_colors; i++) {
if (colorlist[i].color.pixel == passcolor) break;
}
if (i < number_colors) {
bred = colorlist[i].color.red >> 8;
bgreen = colorlist[i].color.green >> 8;
bblue = colorlist[i].color.blue >> 8;
}
}
else {
bred = bgreen = bblue = 0;
}
bred = ((bred * amount) + (255 * (8 - amount))) >> 3;
bgreen = ((bgreen * amount) + (255 * (8 - amount))) >> 3;
bblue = ((bblue * amount) + (255 * (8 - amount))) >> 3;
fprintf(svgf, "%s\"#%02x%02x%02x\" ", prefix, bred, bgreen, bblue);
}
/*----------------------------------------------------------------------*/
/* Fill and/or draw a border around an element */
/*----------------------------------------------------------------------*/
void svg_stroke(int passcolor, short style, float width)
{
float tmpwidth;
short minwidth, solidpart, shade;
tmpwidth = UTopTransScale(xobjs.pagelist[areawin->page]->wirewidth * width);
minwidth = max(1, (short)tmpwidth);
if (style & FILLED || (!(style & FILLED) && style & OPAQUE)) {
if ((style & FILLSOLID) == FILLSOLID) {
svg_printcolor(passcolor, "fill=");
}
else if (!(style & FILLED)) {
fprintf(svgf, "fill=\"white\" ");
}
else {
shade = 1 + ((style & FILLSOLID) >> 5);
if (style & OPAQUE) {
svg_blendcolor(passcolor, "fill=", shade);
}
else {
svg_printcolor(passcolor, "fill=");
fprintf(svgf, "fill-opacity=\"%g\" ", (float)shade / 8);
}
}
}
else
fprintf(svgf, "fill=\"none\" ");
if (!(style & NOBORDER)) {
/* set up dots or dashes */
if (style & DASHED) solidpart = 4 * minwidth;
else if (style & DOTTED) solidpart = minwidth;
if (style & (DASHED | DOTTED)) {
fprintf(svgf, "style=\"stroke-dasharray:%d,%d\" ", solidpart, 4 * minwidth);
fprintf(svgf, "stroke-width=\"%g\" ", tmpwidth);
fprintf(svgf, "stroke-linecap=\"butt\" ");
if (style & SQUARECAP)
fprintf(svgf, "stroke-linejoin=\"miter\" ");
else
fprintf(svgf, "stroke-linejoin=\"bevel\" ");
}
else {
fprintf(svgf, "stroke-width=\"%g\" ", tmpwidth);
if (style & SQUARECAP) {
fprintf(svgf, "stroke-linejoin=\"miter\" ");
fprintf(svgf, "stroke-linecap=\"projecting\" ");
}
else {
fprintf(svgf, "stroke-linejoin=\"bevel\" ");
fprintf(svgf, "stroke-linecap=\"round\" ");
}
}
svg_printcolor(passcolor, "stroke=");
}
else
fprintf(svgf, "stroke=\"none\" ");
fprintf(svgf, "/>\n");
}
/*----------------------------------------------------------------------*/
/* Finish a path and fill and/or stroke */
/*----------------------------------------------------------------------*/
void svg_strokepath(int passcolor, short style, float width)
{
/* Finish the path, closing if necessary */
if (!(style & UNCLOSED))
fprintf(svgf, "z\" ");
else
fprintf(svgf, "\" ");
svg_stroke(passcolor, style, width);
}
/*-------------------------------------------------------------------------*/
void SVGCreateImages(int page)
{
Imagedata *img;
int i, x, y;
short *glist;
FILE *ppf;
union {
u_char b[4];
u_long i;
} pixel;
char *fname, outname[128], *pptr;
#ifndef XC_WIN32
pid_t pid;
#endif
/* Check which images are used on this page */
glist = (short *)malloc(xobjs.images * sizeof(short));
for (i = 0; i < xobjs.images; i++) glist[i] = 0;
count_graphics(xobjs.pagelist[page]->pageinst->thisobject, glist);
for (i = 0; i < xobjs.images; i++) {
if (glist[i] == 0) continue;
img = xobjs.imagelist + i;
/* Generate a PPM file, then convert it to PNG */
fname = tmpnam(NULL);
ppf = fopen(fname, "w");
if (ppf != NULL) {
int width, height;
width = xcImageGetWidth(img->image);
height = xcImageGetWidth(img->image);
fprintf(ppf, "P6 %d %d 255\n", width, height);
for (y = 0; y < height; y++) {
for (x = 0; x < width; x++) {
u_char r, g, b;
xcImageGetPixel(img->image, x, y, &r, &g, &b);
fwrite(&r, 1, 1, ppf);
fwrite(&g, 1, 1, ppf);
fwrite(&b, 1, 1, ppf);
}
}
}
fclose(ppf);
/* Run "convert" to make this into a png file */
strcpy(outname, img->filename);
if ((pptr = strrchr(outname, '.')) != NULL)
strcpy(pptr, ".png");
else
strcat(outname, ".png");
#ifndef XC_WIN32
if ((pid = vfork()) == 0) {
execlp("convert", "convert", fname, outname, NULL);
exit(0); /* not reached */
}
waitpid(pid, NULL, 0);
unlink(fname);
#else
_spawnl(_P_WAIT, GM_EXEC, GM_EXEC, "convert", fname, outname, NULL);
_unlink(fname);
#endif
Fprintf(stdout, "Generated standalone PNG image file %s\n", outname);
}
free(glist);
}
/*-------------------------------------------------------------------------*/
void SVGDrawGraphic(graphicptr gp)
{
XPoint ppt, corner;
Imagedata *img;
int i;
char outname[128], *pptr;
float tscale;
float rotation;
int width = xcImageGetWidth(gp->source);
int height = xcImageGetHeight(gp->source);
for (i = 0; i < xobjs.images; i++) {
img = xobjs.imagelist + i;
if (img->image == gp->source)
break;
}
if (i == xobjs.images) return;
strcpy(outname, img->filename);
if ((pptr = strrchr(outname, '.')) != NULL)
strcpy(pptr, ".png");
else
strcat(outname, ".png");
UPushCTM();
UPreMultCTM(DCTM, gp->position, gp->scale, gp->rotation);
corner.x = -(width >> 1);
corner.y = (height >> 1);
UTransformbyCTM(DCTM, &corner, &ppt, 1);
UPopCTM();
tscale = gp->scale * UTopScale();
rotation = gp->rotation + UTopRotation();
if (rotation >= 360.0) rotation -= 360.0;
else if (rotation < 0.0) rotation += 360.0;
fprintf(svgf, "<image transform=\"translate(%d,%d) scale(%g) rotate(%f)\"\n",
ppt.x, ppt.y, tscale, rotation);
fprintf(svgf, " width=\"%dpx\" height=\"%dpx\"", width, height);
fprintf(svgf, " xlink:href=\"%s\">\n", outname);
fprintf(svgf, "</image>\n");
}
/*-------------------------------------------------------------------------*/
void SVGDrawSpline(splineptr thespline, int passcolor)
{
XPoint tmppoints[4];
UTransformbyCTM(DCTM, thespline->ctrl, tmppoints, 4);
fprintf(svgf, "<path d=\"M%d,%d C%d,%d %d,%d %d,%d ",
tmppoints[0].x, tmppoints[0].y,
tmppoints[1].x, tmppoints[1].y,
tmppoints[2].x, tmppoints[2].y,
tmppoints[3].x, tmppoints[3].y);
svg_strokepath(passcolor, thespline->style, thespline->width);
}
/*-------------------------------------------------------------------------*/
void SVGDrawPolygon(polyptr thepoly, int passcolor)
{
int i;
XPoint *tmppoints = (pointlist) malloc(thepoly->number * sizeof(XPoint));
UTransformbyCTM(DCTM, thepoly->points, tmppoints, thepoly->number);
fprintf(svgf, "<path ");
if (thepoly->style & BBOX) fprintf(svgf, "visibility=\"hidden\" ");
fprintf(svgf, "d=\"M%d,%d L", tmppoints[0].x, tmppoints[0].y);
for (i = 1; i < thepoly->number; i++) {
fprintf(svgf, "%d,%d ", tmppoints[i].x, tmppoints[i].y);
}
svg_strokepath(passcolor, thepoly->style, thepoly->width);
free(tmppoints);
}
/*-------------------------------------------------------------------------*/
void SVGDrawArc(arcptr thearc, int passcolor)
{
XPoint endpoints[2];
int radius[2];
int tarc;
radius[0] = UTopTransScale(thearc->radius);
radius[1] = UTopTransScale(thearc->yaxis);
tarc = (thearc->angle2 - thearc->angle1);
if (tarc == 360) {
UTransformbyCTM(DCTM, &(thearc->position), endpoints, 1);
fprintf(svgf, "<ellipse cx=\"%d\" cy=\"%d\" rx=\"%d\" ry=\"%d\" ",
endpoints[0].x, endpoints[0].y, radius[0], radius[1]);
svg_stroke(passcolor, thearc->style, thearc->width);
}
else {
UfTransformbyCTM(DCTM, thearc->points, endpoints, 1);
UfTransformbyCTM(DCTM, thearc->points + thearc->number - 1, endpoints + 1, 1);
/* When any arc is flipped, the direction of travel reverses. */
fprintf(svgf, "<path d=\"M%d,%d A%d,%d 0 %d,%d %d,%d ",
endpoints[0].x, endpoints[0].y,
radius[0], radius[1],
((tarc > 180) ? 1 : 0),
(((DCTM->a * DCTM->e) >= 0) ? 1 : 0),
endpoints[1].x, endpoints[1].y);
svg_strokepath(passcolor, thearc->style, thearc->width);
}
}
/*-------------------------------------------------------------------------*/
void SVGDrawPath(pathptr thepath, int passcolor)
{
XPoint *tmppoints = (pointlist) malloc(sizeof(XPoint));
genericptr *genpath;
polyptr thepoly;
splineptr thespline;
int i, firstpt = 1;
fprintf(svgf, "<path d=\"");
for (genpath = thepath->plist; genpath < thepath->plist + thepath->parts;
genpath++) {
switch(ELEMENTTYPE(*genpath)) {
case POLYGON:
thepoly = TOPOLY(genpath);
tmppoints = (pointlist) realloc(tmppoints, thepoly->number * sizeof(XPoint));
UTransformbyCTM(DCTM, thepoly->points, tmppoints, thepoly->number);
if (firstpt) {
fprintf(svgf, "M%d,%d ", tmppoints[0].x, tmppoints[0].y);
firstpt = 0;
}
fprintf(svgf, "L");
for (i = 1; i < thepoly->number; i++) {
fprintf(svgf, "%d,%d ", tmppoints[i].x, tmppoints[i].y);
}
break;
case SPLINE:
thespline = TOSPLINE(genpath);
tmppoints = (pointlist) realloc(tmppoints, 4 * sizeof(XPoint));
UTransformbyCTM(DCTM, thespline->ctrl, tmppoints, 4);
if (firstpt) {
fprintf(svgf, "M%d,%d ", tmppoints[0].x, tmppoints[0].y);
firstpt = 0;
}
fprintf(svgf, "C%d,%d %d,%d %d,%d ",
tmppoints[1].x, tmppoints[1].y,
tmppoints[2].x, tmppoints[2].y,
tmppoints[3].x, tmppoints[3].y);
break;
}
}
svg_strokepath(passcolor, thepath->style, thepath->width);
free(tmppoints);
}
/*----------------------------------------------------------------------*/
/* Main recursive object instance drawing routine. */
/* context is the instance information passed down from above */
/* theinstance is the object instance to be drawn */
/* level is the level of recursion */
/* passcolor is the inherited color value passed to object */
/*----------------------------------------------------------------------*/
void SVGDrawObject(objinstptr theinstance, short level, int passcolor, pushlistptr *stack)
{
genericptr *areagen;
float tmpwidth;
int defaultcolor = passcolor;
int curcolor = passcolor;
int thispart;
objectptr theobject = theinstance->thisobject;
/* All parts are given in the coordinate system of the object, unless */
/* this is the top-level object, in which they will be interpreted as */
/* relative to the screen. */
UPushCTM();
if (stack) push_stack(stack, theinstance, NULL);
if (level != 0)
UPreMultCTM(DCTM, theinstance->position, theinstance->scale,
theinstance->rotation);
/* make parameter substitutions */
psubstitute(theinstance);
/* draw all of the elements */
tmpwidth = UTopTransScale(xobjs.pagelist[areawin->page]->wirewidth);
/* Here---set a default style using "g" like PostScript "gsave" */
/* stroke-width = tmpwidth, stroke = passcolor */
/* guard against plist being regenerated during a redraw by the */
/* expression parameter mechanism (should that be prohibited?) */
for (thispart = 0; thispart < theobject->parts; thispart++) {
areagen = theobject->plist + thispart;
if ((*areagen)->type & DRAW_HIDE) continue;
if (defaultcolor != DOFORALL) {
if ((*areagen)->color != curcolor) {
if ((*areagen)->color == DEFAULTCOLOR)
curcolor = defaultcolor;
else
curcolor = (*areagen)->color;
}
}
switch(ELEMENTTYPE(*areagen)) {
case(POLYGON):
if (level == 0 || !((TOPOLY(areagen))->style & BBOX))
SVGDrawPolygon(TOPOLY(areagen), curcolor);
break;
case(SPLINE):
SVGDrawSpline(TOSPLINE(areagen), curcolor);
break;
case(ARC):
SVGDrawArc(TOARC(areagen), curcolor);
break;
case(PATH):
SVGDrawPath(TOPATH(areagen), curcolor);
break;
case(GRAPHIC):
SVGDrawGraphic(TOGRAPHIC(areagen));
break;
case(OBJINST):
if (areawin->editinplace && stack && (TOOBJINST(areagen)
== areawin->topinstance)) {
/* If stack matches areawin->stack, then don't */
/* draw because it would be redundant. */
pushlistptr alist = *stack, blist = areawin->stack;
while (alist && blist) {
if (alist->thisinst != blist->thisinst) break;
alist = alist->next;
blist = blist->next;
}
if ((!alist) || (!blist)) break;
}
SVGDrawObject(TOOBJINST(areagen), level + 1, curcolor, stack);
break;
case(LABEL):
if (level == 0 || TOLABEL(areagen)->pin == False ||
(TOLABEL(areagen)->anchor & PINVISIBLE))
SVGDrawString(TOLABEL(areagen), curcolor, theinstance);
break;
}
}
UPopCTM();
if (stack) pop_stack(stack);
}
/*----------------------------------------------------------------------*/
#define addlinepoint(pointlist, numvals, xval, yval) \
{ if (!numvals) pointlist = (XPoint *)malloc(sizeof(XPoint)); \
else pointlist = (XPoint *)realloc(pointlist, (numvals + 1) * sizeof(XPoint)); \
pointlist[numvals].x = xval; \
pointlist[numvals++].y = -yval; \
}
/*----------------------------------------------------------------------*/
/* Draw an entire string, including parameter substitutions */
/*----------------------------------------------------------------------*/
void SVGDrawString(labelptr drawlabel, int passcolor, objinstptr localinst)
{
stringpart *strptr;
char *textptr;
short fstyle, ffont, tmpanchor, baseline, deltay;
int pos, defaultcolor, curcolor, scolor;
short oldx, oldfont, oldstyle;
int olinerise = 4;
float tmpscale = 1.0, natscale = 1.0;
XPoint newpoint;
TextExtents tmpext;
TextLinesInfo tlinfo;
short *tabstops = NULL;
short tabno, numtabs = 0, group = 0;
short linenum = 0;
int open_text, open_span, open_decor;
XPoint *decorations = NULL;
short nvals = 0;
char *symbol_html_encoding[] = {
" ", "!", "∀", "#", "∃", "%", "&", "?", "(", ")",
"*", "+", ",", "−", ".", "/", "0", "1", "2", "3", "4",
"5", "6", "7", "8", "9", ":", ";", "<", "=", ">", "?", "≅",
"Α", "Β", "Χ", "Δ", "Ε", "Φ",
"Γ", "Η", "Ι", "ϑ", "Κ", "Λ",
"Μ", "Ν", "Ο", "Π", "Θ", "Ρ",
"Σ", "Τ", "Υ", "σ", "Ω", "Ξ",
"Ψ", "Ζ", "[", "∴", "]", "⊥", "_",
"‾", "α", "β", "χ", "δ", "ε",
"φ", "γ", "η", "ι", "φ", "κ",
"λ", "μ", "ν", "ο", "π", "θ",
"ρ", "σ", "τ", "υ", "ω", "ω",
"ξ", "ψ", "ζ", "{", "|", "}", "~", "", "", "",
"", "", "", "", "", "", "", "", "", "", "", "", "", "", "",
"", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "",
"ϒ", "′", "≤", "⁄", "∞", "ƒ",
"♣", "♦", "♥", "♠", "↔",
"←", "↑", "→", "↓", "°", "±",
"″", "≥", "×", "∝", "∂", "•",
"÷", "≠", "≡", "≅", "…"
};
/* Standard encoding vector, in HTML, from character 161 to 255 */
u_int standard_html_encoding[] = {
161, 162, 163, 8725, 165, 131, 167, 164, 146, 147, 171, 8249,
8250, 64256, 64258, 0, 8211, 8224, 8225, 183, 0, 182, 8226,
8218, 8222, 8221, 187, 8230, 8240, 0, 191, 0, 96, 180, 710,
126, 713, 728, 729, 168, 0, 730, 184, 0, 733, 731, 711, 8212,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 508, 0,
170, 0, 0, 0, 0, 321, 216, 338, 186, 0, 0, 0, 0, 0, 230, 0,
0, 0, 185, 0, 0, 322, 248, 339, 223};
if (fontcount == 0) return;
/* Don't draw temporary labels from schematic capture system */
if (drawlabel->string->type != FONT_NAME) return;
if (passcolor == DOSUBSTRING)
defaultcolor = curcolor = drawlabel->color;
else
defaultcolor = curcolor = passcolor;
if (defaultcolor != DOFORALL) {
if (drawlabel->color != DEFAULTCOLOR)
curcolor = drawlabel->color;
else
curcolor = defaultcolor;
}
/* calculate the transformation matrix for this object */
/* in natural units of the alphabet vectors */
/* (conversion to window units) */
/* Labels don't rotate in Firefox, so use <g> record for transform */
UPushCTM();
UPreMultCTM(DCTM, drawlabel->position, drawlabel->scale, drawlabel->rotation);
/* check for flip invariance; recompute CTM and anchoring if necessary */
tmpanchor = flipadjust(drawlabel->anchor);
/* Note that the Y-scale is inverted or text comes out upside-down. But we */
/* need to adjust to the Y baseline. */
fprintf(svgf, "<g transform=\"matrix(%4g %4g %4g %4g %3g %3g)\" ",
DCTM->a, DCTM->d, -(DCTM->b), -(DCTM->e), DCTM->c, DCTM->f);
svg_printcolor(passcolor, "fill=");
fprintf(svgf, ">\n");
/* "natural" (unscaled) length */
tlinfo.dostop = 0;
tlinfo.tbreak = NULL;
tlinfo.padding = NULL;
tmpext = ULength(drawlabel, localinst, &tlinfo);
newpoint.x = (tmpanchor & NOTLEFT ?
(tmpanchor & RIGHT ? -tmpext.maxwidth : -tmpext.maxwidth >> 1) : 0);
newpoint.y = (tmpanchor & NOTBOTTOM ?
(tmpanchor & TOP ? -tmpext.ascent : -(tmpext.ascent + tmpext.base) >> 1)
: -tmpext.base);
/* Pinlabels have an additional offset spacing to pad */
/* them from the circuit point to which they attach. */
if (drawlabel->pin) {
pinadjust(tmpanchor, &(newpoint.x), &(newpoint.y), 1);
}
oldx = newpoint.x;
baseline = newpoint.y;
open_text = -1;
open_span = 0;
open_decor = 0;
pos = 0;
/* Adjust for center or right justification */
if (tlinfo.padding != NULL) {
if (tmpanchor & JUSTIFYRIGHT)
newpoint.x += tlinfo.padding[linenum];
else if (tmpanchor & TEXTCENTERED)
newpoint.x += 0.5 * tlinfo.padding[linenum];
linenum++;
}
for (strptr = drawlabel->string; strptr != NULL;
strptr = nextstringpart(strptr, localinst)) {
/* All segments other than text cancel any */
/* existing overline/underline in effect. */
if (strptr->type != TEXT_STRING)
fstyle &= 0xfc7;
switch(strptr->type) {
case RETURN:
while (open_span > 0) {
fprintf(svgf, "</tspan>");
open_span--;
}
while (open_text > 0) {
fprintf(svgf, "</text>");
open_text--;
}
if (open_decor) {
addlinepoint(decorations, nvals, newpoint.x, group);
open_decor--;
}
break;
case FONT_SCALE:
case FONT_NAME:
while (open_span > 0) {
fprintf(svgf, "</tspan>");
open_span--;
}
while (open_text > 0) {
fprintf(svgf, "</text>");
open_text--;
}
if (open_decor) {
addlinepoint(decorations, nvals, newpoint.x, group);
open_decor--;
}
break;
case KERN:
case TABFORWARD:
case TABBACKWARD:
case TABSTOP:
case HALFSPACE:
case QTRSPACE:
case NOLINE:
case UNDERLINE:
case OVERLINE:
case SUBSCRIPT:
case SUPERSCRIPT:
case NORMALSCRIPT:
while (open_span > 1) {
fprintf(svgf, "</tspan>");
open_span--;
}
if (open_decor) {
addlinepoint(decorations, nvals, newpoint.x, group);
open_decor--;
}
break;
/* These do not need to be handled */
case TEXT_STRING:
case PARAM_START:
case PARAM_END:
break;
/* These are not handled yet, but should be */
case FONT_COLOR:
break;
default:
break;
}
/* deal with each text segment type */
switch(strptr->type) {
case FONT_SCALE:
case FONT_NAME:
if (strptr->data.font < fontcount) {
ffont = strptr->data.font;
fstyle = 0; /* style reset by font change */
if (baseline == newpoint.y) { /* set top-level font and style */
oldfont = ffont;
oldstyle = fstyle;
}
}
fprintf(svgf, "<text stroke=\"none\" ");
fprintf(svgf, "font-family=");
if (issymbolfont(ffont))
fprintf(svgf, "\"Times\" ");
else if (!strncmp(fonts[ffont].family, "Times", 5))
fprintf(svgf, "\"Times\" ");
else
fprintf(svgf, "\"%s\" ", fonts[ffont].family);
if (fonts[ffont].flags & 0x1)
fprintf(svgf, " font-weight=\"bold\" ");
if (fonts[ffont].flags & 0x2) {
if (issansfont(ffont))
fprintf(svgf, " font-style=\"oblique\" ");
else
fprintf(svgf, " font-style=\"italic\" ");
}
olinerise = (issansfont(ffont)) ? 7 : 4;
if (strptr->type == FONT_SCALE) {
tmpscale = natscale * strptr->data.scale;
if (baseline == newpoint.y) /* reset top-level scale */
natscale = tmpscale;
}
else
tmpscale = 1;
/* Actual scale taken care of by transformation matrix */
fprintf(svgf, "font-size=\"%g\" >", tmpscale * 40);
fprintf(svgf, "<tspan x=\"%d\" y=\"%d\">", newpoint.x, -newpoint.y);
open_text++;
open_span++;
break;
case KERN:
newpoint.x += strptr->data.kern[0];
newpoint.y += strptr->data.kern[1];
fprintf(svgf, "<text dx=\"%d\" dy=\"%d\">",
strptr->data.kern[0], strptr->data.kern[1]);
open_text++;
break;
case FONT_COLOR:
if (defaultcolor != DOFORALL) {
if (strptr->data.color != DEFAULTCOLOR)
curcolor = colorlist[strptr->data.color].color.pixel;
else {
curcolor = DEFAULTCOLOR;
}
}
break;
case TABBACKWARD: /* find first tab value with x < xtotal */
for (tabno = numtabs - 1; tabno >= 0; tabno--) {
if (tabstops[tabno] < newpoint.x) {
newpoint.x = tabstops[tabno];
break;
}
}
fprintf(svgf, "<tspan x=\"%d\">", newpoint.x);
open_span++;
break;
case TABFORWARD: /* find first tab value with x > xtotal */
for (tabno = 0; tabno < numtabs; tabno++) {
if (tabstops[tabno] > newpoint.x) {
newpoint.x = tabstops[tabno];
break;
}
}
fprintf(svgf, "<tspan x=\"%d\">", newpoint.x);
open_span++;
break;
case TABSTOP:
numtabs++;
if (tabstops == NULL) tabstops = (short *)malloc(sizeof(short));
else tabstops = (short *)realloc(tabstops, numtabs * sizeof(short));
tabstops[numtabs - 1] = newpoint.x;
/* Force a tab at this point so that the output aligns */
/* to our computation of the position, not its own. */
fprintf(svgf, "<tspan x=\"%d\">", newpoint.x);
open_span++;
break;
case RETURN:
tmpscale = natscale = 1.0;
baseline -= BASELINE;
newpoint.y = baseline;
newpoint.x = oldx;
if (tlinfo.padding != NULL) {
if (tmpanchor & JUSTIFYRIGHT)
newpoint.x += tlinfo.padding[linenum];
else if (tmpanchor & TEXTCENTERED)
newpoint.x += 0.5 * tlinfo.padding[linenum];
linenum++;
}
fprintf(svgf, "<tspan x=\"%d\" y=\"%d\">", newpoint.x, -newpoint.y);
open_span++;
break;
case SUBSCRIPT:
natscale *= SUBSCALE;
tmpscale = natscale;
deltay = (short)((TEXTHEIGHT >> 1) * natscale);
newpoint.y -= deltay;
fprintf(svgf, "<tspan dy=\"%d\" font-size=\"%g\">", deltay,
40 * natscale);
open_span++;
break;
case SUPERSCRIPT:
natscale *= SUBSCALE;
tmpscale = natscale;
deltay = (short)(TEXTHEIGHT * natscale);
newpoint.y += deltay;
fprintf(svgf, "<tspan dy=\"%d\" font-size=\"%g\">", -deltay,
40 * natscale);
open_span++;
break;
case NORMALSCRIPT:
tmpscale = natscale = 1.0;
ffont = oldfont; /* revert to top-level font and style */
fstyle = oldstyle;
newpoint.y = baseline;
fprintf(svgf, "<tspan y=\"%d\">", baseline);
open_span++;
break;
case UNDERLINE:
fstyle |= 8;
group = newpoint.y - 6;
addlinepoint(decorations, nvals, newpoint.x, group);
open_decor++;
break;
case OVERLINE:
if (strptr->nextpart != NULL && strptr->nextpart->type == TEXT_STRING) {
objectptr charptr;
int tmpheight;
group = 0;
for (textptr = strptr->nextpart->data.string;
textptr && *textptr != '\0'; textptr++) {
charptr = fonts[ffont].encoding[*(u_char *)textptr];
tmpheight = (int)((float)charptr->bbox.height
* fonts[ffont].scale);
if (group < tmpheight) group = (short)tmpheight;
}
fstyle |= 16;
group += olinerise + newpoint.y;
addlinepoint(decorations, nvals, newpoint.x, group);
}
open_decor++;
break;
case NOLINE:
break;
case HALFSPACE: case QTRSPACE: {
short addx;
objectptr drawchar = fonts[ffont].encoding[(u_char)32];
addx = (drawchar->bbox.lowerleft.x + drawchar->bbox.width) *
fonts[ffont].scale;
addx >>= ((strptr->type == HALFSPACE) ? 1 : 2);
newpoint.x += addx;
fprintf(svgf, "<tspan dx=\"%d\">", addx);
open_span++;
} break;
case TEXT_STRING:
textptr = strptr->data.string;
if (issymbolfont(ffont)) {
for (; *textptr != '\0'; textptr++)
if (((u_char)(*textptr) >= 32) && ((u_char)(*textptr) < 158))
fprintf(svgf, "%s", symbol_html_encoding[(*textptr) - 32]);
}
else {
/* Handle "&" and non-ASCII characters in the text */
if (isisolatin1(ffont)) {
for (; *textptr != '\0'; textptr++) {
if (*textptr == '&')
fprintf(svgf, "&");
else if ((u_char)(*textptr) >= 128)
fprintf(svgf, "&#%d;", (int)((u_char)*textptr));
else if ((u_char)(*textptr) >= 32)
fprintf(svgf, "%c", *textptr);
}
}
else {
for (; *textptr != '\0'; textptr++) {
if (*textptr == '&')
fprintf(svgf, "&");
else if ((u_char)(*textptr) >= 161)
fprintf(svgf, "&#%d;",
standard_html_encoding[(u_char)(*textptr)
- 161]);
else if ((u_char)(*textptr) >= 32 && (u_char)(*textptr) < 161)
fprintf(svgf, "%c", *textptr);
}
}
}
pos--;
/* Compute the new X position */
for (textptr = strptr->data.string; *textptr != '\0'; textptr++) {
objectptr drawchar = fonts[ffont].encoding[(u_char)(*textptr)];
short addx = (drawchar->bbox.lowerleft.x + drawchar->bbox.width) *
fonts[ffont].scale;
newpoint.x += addx;
}
break;
}
pos++;
}
while (open_span > 0) {
fprintf(svgf, "</tspan>");
open_span--;
}
while (open_text > 0) {
fprintf(svgf, "</text>");
open_text--;
}
fprintf(svgf, "\n</text>");
UPopCTM();
if (tabstops != NULL) free(tabstops);
if (tlinfo.padding != NULL) free(tlinfo.padding);
/* If there were decorations (underlines, overlines), generate them */
if (decorations != NULL) {
int i;
if (open_decor) {