ref: 87e98e67158326a7dd94fd8fa255e3695898ecf3
dir: /ps.c/
/*
* ps.c: PostScript printing functions.
*/
#include <stdio.h>
#include <stdarg.h>
#include <string.h>
#include <assert.h>
#include "puzzles.h"
struct psdata {
FILE *fp;
bool colour;
int ytop;
bool clipped;
float hatchthick, hatchspace;
int gamewidth, gameheight;
drawing *drawing;
};
static void ps_printf(psdata *ps, const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
vfprintf(ps->fp, fmt, ap);
va_end(ap);
}
static void ps_fill(psdata *ps, int colour)
{
int hatch;
float r, g, b;
print_get_colour(ps->drawing, colour, ps->colour, &hatch, &r, &g, &b);
if (hatch < 0) {
if (ps->colour)
ps_printf(ps, "%g %g %g setrgbcolor fill\n", r, g, b);
else
ps_printf(ps, "%g setgray fill\n", r);
} else {
/* Clip to the region. */
ps_printf(ps, "gsave clip\n");
/* Hatch the entire game printing area. */
ps_printf(ps, "newpath\n");
if (hatch == HATCH_VERT || hatch == HATCH_PLUS)
ps_printf(ps, "0 %g %d {\n"
" 0 moveto 0 %d rlineto\n"
"} for\n", ps->hatchspace, ps->gamewidth,
ps->gameheight);
if (hatch == HATCH_HORIZ || hatch == HATCH_PLUS)
ps_printf(ps, "0 %g %d {\n"
" 0 exch moveto %d 0 rlineto\n"
"} for\n", ps->hatchspace, ps->gameheight,
ps->gamewidth);
if (hatch == HATCH_SLASH || hatch == HATCH_X)
ps_printf(ps, "%d %g %d {\n"
" 0 moveto %d dup rlineto\n"
"} for\n", -ps->gameheight, ps->hatchspace * ROOT2,
ps->gamewidth, max(ps->gamewidth, ps->gameheight));
if (hatch == HATCH_BACKSLASH || hatch == HATCH_X)
ps_printf(ps, "0 %g %d {\n"
" 0 moveto %d neg dup neg rlineto\n"
"} for\n", ps->hatchspace * ROOT2,
ps->gamewidth+ps->gameheight,
max(ps->gamewidth, ps->gameheight));
ps_printf(ps, "0 setgray %g setlinewidth stroke grestore\n",
ps->hatchthick);
}
}
static void ps_setcolour_internal(psdata *ps, int colour, const char *suffix)
{
int hatch;
float r, g, b;
print_get_colour(ps->drawing, colour, ps->colour, &hatch, &r, &g, &b);
/*
* Stroking in hatched colours is not permitted.
*/
assert(hatch < 0);
if (ps->colour)
ps_printf(ps, "%g %g %g setrgbcolor%s\n", r, g, b, suffix);
else
ps_printf(ps, "%g setgray%s\n", r, suffix);
}
static void ps_setcolour(psdata *ps, int colour)
{
ps_setcolour_internal(ps, colour, "");
}
static void ps_stroke(psdata *ps, int colour)
{
ps_setcolour_internal(ps, colour, " stroke");
}
static void ps_draw_text(void *handle, int x, int y, int fonttype,
int fontsize, int align, int colour,
const char *text)
{
psdata *ps = (psdata *)handle;
y = ps->ytop - y;
ps_setcolour(ps, colour);
ps_printf(ps, "/%s findfont %d scalefont setfont\n",
fonttype == FONT_FIXED ? "Courier-L1" : "Helvetica-L1",
fontsize);
if (align & ALIGN_VCENTRE) {
ps_printf(ps, "newpath 0 0 moveto (X) true charpath flattenpath"
" pathbbox\n"
"3 -1 roll add 2 div %d exch sub %d exch moveto pop pop\n",
y, x);
} else {
ps_printf(ps, "%d %d moveto\n", x, y);
}
ps_printf(ps, "(");
while (*text) {
if (*text == '\\' || *text == '(' || *text == ')')
ps_printf(ps, "\\");
ps_printf(ps, "%c", *text);
text++;
}
ps_printf(ps, ") ");
if (align & (ALIGN_HCENTRE | ALIGN_HRIGHT))
ps_printf(ps, "dup stringwidth pop %sneg 0 rmoveto show\n",
(align & ALIGN_HCENTRE) ? "2 div " : "");
else
ps_printf(ps, "show\n");
}
static void ps_draw_rect(void *handle, int x, int y, int w, int h, int colour)
{
psdata *ps = (psdata *)handle;
y = ps->ytop - y;
/*
* Offset by half a pixel for the exactness requirement.
*/
ps_printf(ps, "newpath %g %g moveto %d 0 rlineto 0 %d rlineto"
" %d 0 rlineto closepath\n", x - 0.5, y + 0.5, w, -h, -w);
ps_fill(ps, colour);
}
static void ps_draw_line(void *handle, int x1, int y1, int x2, int y2,
int colour)
{
psdata *ps = (psdata *)handle;
y1 = ps->ytop - y1;
y2 = ps->ytop - y2;
ps_printf(ps, "newpath %d %d moveto %d %d lineto\n", x1, y1, x2, y2);
ps_stroke(ps, colour);
}
static void ps_draw_polygon(void *handle, const int *coords, int npoints,
int fillcolour, int outlinecolour)
{
psdata *ps = (psdata *)handle;
int i;
ps_printf(ps, "newpath %d %d moveto\n", coords[0], ps->ytop - coords[1]);
for (i = 1; i < npoints; i++)
ps_printf(ps, "%d %d lineto\n", coords[i*2], ps->ytop - coords[i*2+1]);
ps_printf(ps, "closepath\n");
if (fillcolour >= 0) {
ps_printf(ps, "gsave\n");
ps_fill(ps, fillcolour);
ps_printf(ps, "grestore\n");
}
ps_stroke(ps, outlinecolour);
}
static void ps_draw_circle(void *handle, int cx, int cy, int radius,
int fillcolour, int outlinecolour)
{
psdata *ps = (psdata *)handle;
cy = ps->ytop - cy;
ps_printf(ps, "newpath %d %d %d 0 360 arc closepath\n", cx, cy, radius);
if (fillcolour >= 0) {
ps_printf(ps, "gsave\n");
ps_fill(ps, fillcolour);
ps_printf(ps, "grestore\n");
}
ps_stroke(ps, outlinecolour);
}
static void ps_unclip(void *handle)
{
psdata *ps = (psdata *)handle;
assert(ps->clipped);
ps_printf(ps, "grestore\n");
ps->clipped = false;
}
static void ps_clip(void *handle, int x, int y, int w, int h)
{
psdata *ps = (psdata *)handle;
if (ps->clipped)
ps_unclip(ps);
y = ps->ytop - y;
/*
* Offset by half a pixel for the exactness requirement.
*/
ps_printf(ps, "gsave\n");
ps_printf(ps, "newpath %g %g moveto %d 0 rlineto 0 %d rlineto"
" %d 0 rlineto closepath\n", x - 0.5, y + 0.5, w, -h, -w);
ps_printf(ps, "clip\n");
ps->clipped = true;
}
static void ps_line_width(void *handle, float width)
{
psdata *ps = (psdata *)handle;
ps_printf(ps, "%g setlinewidth\n", width);
}
static void ps_line_dotted(void *handle, bool dotted)
{
psdata *ps = (psdata *)handle;
if (dotted) {
ps_printf(ps, "[ currentlinewidth 3 mul ] 0 setdash\n");
} else {
ps_printf(ps, "[ ] 0 setdash\n");
}
}
static char *ps_text_fallback(void *handle, const char *const *strings,
int nstrings)
{
/*
* We can handle anything in ISO 8859-1, and we'll manually
* translate it out of UTF-8 for the purpose.
*/
int i, maxlen;
char *ret;
maxlen = 0;
for (i = 0; i < nstrings; i++) {
int len = strlen(strings[i]);
if (maxlen < len) maxlen = len;
}
ret = snewn(maxlen + 1, char);
for (i = 0; i < nstrings; i++) {
const char *p = strings[i];
char *q = ret;
while (*p) {
int c = (unsigned char)*p++;
if (c < 0x80) {
*q++ = c; /* ASCII */
} else if ((c == 0xC2 || c == 0xC3) && (*p & 0xC0) == 0x80) {
*q++ = (c << 6) | (*p++ & 0x3F); /* top half of 8859-1 */
} else {
break;
}
}
if (!*p) {
*q = '\0';
return ret;
}
}
assert(!"Should never reach here");
return NULL;
}
static void ps_begin_doc(void *handle, int pages)
{
psdata *ps = (psdata *)handle;
fputs("%!PS-Adobe-3.0\n", ps->fp);
fputs("%%Creator: Simon Tatham's Portable Puzzle Collection\n", ps->fp);
fputs("%%DocumentData: Clean7Bit\n", ps->fp);
fputs("%%LanguageLevel: 1\n", ps->fp);
fprintf(ps->fp, "%%%%Pages: %d\n", pages);
fputs("%%DocumentNeededResources:\n", ps->fp);
fputs("%%+ font Helvetica\n", ps->fp);
fputs("%%+ font Courier\n", ps->fp);
fputs("%%EndComments\n", ps->fp);
fputs("%%BeginSetup\n", ps->fp);
fputs("%%IncludeResource: font Helvetica\n", ps->fp);
fputs("%%IncludeResource: font Courier\n", ps->fp);
fputs("%%EndSetup\n", ps->fp);
fputs("%%BeginProlog\n", ps->fp);
/*
* Re-encode Helvetica and Courier into ISO-8859-1, which gives
* us times and divide signs - and also (according to the
* Language Reference Manual) a bonus in that the ASCII '-' code
* point now points to a minus sign instead of a hyphen.
*/
fputs("/Helvetica findfont " /* get the font dictionary */
"dup maxlength dict dup begin " /* create and open a new dict */
"exch " /* move the original font to top of stack */
"{1 index /FID ne {def} {pop pop} ifelse} forall "
/* copy everything except FID */
"/Encoding ISOLatin1Encoding def "
/* set the thing we actually wanted to change */
"/FontName /Helvetica-L1 def " /* set a new font name */
"FontName end exch definefont" /* and define the font */
"\n", ps->fp);
fputs("/Courier findfont " /* get the font dictionary */
"dup maxlength dict dup begin " /* create and open a new dict */
"exch " /* move the original font to top of stack */
"{1 index /FID ne {def} {pop pop} ifelse} forall "
/* copy everything except FID */
"/Encoding ISOLatin1Encoding def "
/* set the thing we actually wanted to change */
"/FontName /Courier-L1 def " /* set a new font name */
"FontName end exch definefont" /* and define the font */
"\n", ps->fp);
fputs("%%EndProlog\n", ps->fp);
}
static void ps_begin_page(void *handle, int number)
{
psdata *ps = (psdata *)handle;
fprintf(ps->fp, "%%%%Page: %d %d\ngsave save\n%g dup scale\n",
number, number, 72.0 / 25.4);
}
static void ps_begin_puzzle(void *handle, float xm, float xc,
float ym, float yc, int pw, int ph, float wmm)
{
psdata *ps = (psdata *)handle;
fprintf(ps->fp, "gsave\n"
"clippath flattenpath pathbbox pop pop translate\n"
"clippath flattenpath pathbbox 4 2 roll pop pop\n"
"exch %g mul %g add exch dup %g mul %g add sub translate\n"
"%g dup scale\n"
"0 -%d translate\n", xm, xc, ym, yc, wmm/pw, ph);
ps->ytop = ph;
ps->clipped = false;
ps->gamewidth = pw;
ps->gameheight = ph;
ps->hatchthick = 0.2 * pw / wmm;
ps->hatchspace = 1.0 * pw / wmm;
}
static void ps_end_puzzle(void *handle)
{
psdata *ps = (psdata *)handle;
fputs("grestore\n", ps->fp);
}
static void ps_end_page(void *handle, int number)
{
psdata *ps = (psdata *)handle;
fputs("restore grestore showpage\n", ps->fp);
}
static void ps_end_doc(void *handle)
{
psdata *ps = (psdata *)handle;
fputs("%%EOF\n", ps->fp);
}
static const struct drawing_api ps_drawing = {
ps_draw_text,
ps_draw_rect,
ps_draw_line,
ps_draw_polygon,
ps_draw_circle,
NULL /* draw_update */,
ps_clip,
ps_unclip,
NULL /* start_draw */,
NULL /* end_draw */,
NULL /* status_bar */,
NULL /* blitter_new */,
NULL /* blitter_free */,
NULL /* blitter_save */,
NULL /* blitter_load */,
ps_begin_doc,
ps_begin_page,
ps_begin_puzzle,
ps_end_puzzle,
ps_end_page,
ps_end_doc,
ps_line_width,
ps_line_dotted,
ps_text_fallback,
};
psdata *ps_init(FILE *outfile, bool colour)
{
psdata *ps = snew(psdata);
ps->fp = outfile;
ps->colour = colour;
ps->ytop = 0;
ps->clipped = false;
ps->hatchthick = ps->hatchspace = ps->gamewidth = ps->gameheight = 0;
ps->drawing = drawing_new(&ps_drawing, NULL, ps);
return ps;
}
void ps_free(psdata *ps)
{
drawing_free(ps->drawing);
sfree(ps);
}
drawing *ps_drawing_api(psdata *ps)
{
return ps->drawing;
}