void ps_printer::fill_path(const environment *env)
{
if (sbuf_color == *env->fill)
out.put_symbol("FL");
else
set_color(env->fill, 1);
}
void ps_printer::end_page(int)
{
flush_sbuf();
set_color(&default_color);
out.put_symbol("EP");
if (invis_count != 0) {
error("missing `endinvis' command");
invis_count = 0;
}
}
void ps_printer::set_color(color *col, int fill)
{
sbuf_color = *col;
unsigned int components[4];
char s[3];
color_scheme cs = col->get_components(components);
s[0] = fill ? 'F' : 'C';
s[2] = 0;
switch (cs) {
case DEFAULT: // black
out.put_symbol("0");
s[1] = 'g';
break;
case RGB:
out.put_color(Red)
.put_color(Green)
.put_color(Blue);
s[1] = 'r';
break;
case CMY:
col->get_cmyk(&Cyan, &Magenta, &Yellow, &Black);
// fall through
case CMYK:
out.put_color(Cyan)
.put_color(Magenta)
.put_color(Yellow)
.put_color(Black);
s[1] = 'k';
cmyk_flag = 1;
break;
case GRAY:
out.put_color(Gray);
s[1] = 'g';
break;
}
out.put_symbol(s);
}
void ps_printer::set_style(const style &sty)
{
char buf[1 + INT_DIGITS + 1];
for (int i = 0; i < ndefined_styles; i++)
if (sty == defined_styles[i]) {
sprintf(buf, "F%d", i);
out.put_symbol(buf);
return;
}
if (ndefined_styles >= MAX_DEFINED_STYLES)
ndefined_styles = 0;
sprintf(buf, "F%d", ndefined_styles);
out.put_literal_symbol(buf);
const char *psname = sty.f->get_internal_name();
if (psname == 0)
fatal("no internalname specified for font `%1'", sty.f->get_name());
char *encoding = ((ps_font *)sty.f)->encoding;
if (sty.sub == 0) {
if (encoding != 0) {
char *s = ((ps_font *)sty.f)->reencoded_name;
if (s == 0) {
int ei = set_encoding_index((ps_font *)sty.f);
char *tem = new char[strlen(psname) + 1 + INT_DIGITS + 1];
sprintf(tem, "%s@%d", psname, ei);
psname = tem;
((ps_font *)sty.f)->reencoded_name = tem;
}
else
psname = s;
}
}
else
psname = get_subfont(sty.sub, psname);
out.put_fix_number((font::res/(72*font::sizescale))*sty.point_size);
if (sty.height != 0 || sty.slant != 0) {
int h = sty.height == 0 ? sty.point_size : sty.height;
h *= font::res/(72*font::sizescale);
int c = int(h*tan(radians(sty.slant)) + .5);
out.put_fix_number(c)
.put_fix_number(h)
.put_literal_symbol(psname)
.put_symbol("MF");
}
else {
out.put_literal_symbol(psname)
.put_symbol("SF");
}
defined_styles[ndefined_styles++] = sty;
}
void ps_printer::flush_sbuf()
{
enum {
NONE,
RELATIVE_H,
RELATIVE_V,
RELATIVE_HV,
ABSOLUTE
} motion = NONE;
int space_flag = 0;
if (sbuf_len == 0)
return;
if (output_style != sbuf_style) {
set_style(sbuf_style);
output_style = sbuf_style;
}
int extra_space = 0;
if (output_hpos < 0 || output_vpos < 0)
motion = ABSOLUTE;
else {
if (output_hpos != sbuf_start_hpos)
motion = RELATIVE_H;
if (output_vpos != sbuf_vpos) {
if (motion != NONE)
motion = RELATIVE_HV;
else
motion = RELATIVE_V;
}
}
if (sbuf_space_code >= 0) {
int w = sbuf_style.f->get_width(space_glyph, sbuf_style.point_size);
if (w + sbuf_kern != sbuf_space_width) {
if (sbuf_space_code != output_space_code) {
set_space_code(sbuf_space_code);
output_space_code = sbuf_space_code;
}
space_flag = 1;
extra_space = sbuf_space_width - w - sbuf_kern;
if (sbuf_space_diff_count > sbuf_space_count/2)
extra_space++;
else if (sbuf_space_diff_count < -(sbuf_space_count/2))
extra_space--;
}
}
if (space_flag)
out.put_fix_number(extra_space);
if (sbuf_kern != 0)
out.put_fix_number(sbuf_kern);
out.put_string(sbuf, sbuf_len);
char command_array[] = {'A', 'B', 'C', 'D',
'E', 'F', 'G', 'H',
'I', 'J', 'K', 'L',
'M', 'N', 'O', 'P',
'Q', 'R', 'S', 'T'};
char sym[2];
sym[0] = command_array[motion*4 + space_flag + 2*(sbuf_kern != 0)];
sym[1] = '\0';
switch (motion) {
case NONE:
break;
case ABSOLUTE:
out.put_fix_number(sbuf_start_hpos)
.put_fix_number(sbuf_vpos);
break;
case RELATIVE_H:
out.put_fix_number(sbuf_start_hpos - output_hpos);
break;
case RELATIVE_V:
out.put_fix_number(sbuf_vpos - output_vpos);
break;
case RELATIVE_HV:
out.put_fix_number(sbuf_start_hpos - output_hpos)
.put_fix_number(sbuf_vpos - output_vpos);
break;
default:
assert(0);
}
out.put_symbol(sym);
output_hpos = sbuf_end_hpos;
output_vpos = sbuf_vpos;
sbuf_len = 0;
}
void ps_printer::do_import(char *arg, const environment *env)
{
while (*arg == ' ' || *arg == '\n')
arg++;
char *p;
for (p = arg; *p != '\0' && *p != ' ' && *p != '\n'; p++)
;
if (*p != '\0')
*p++ = '\0';
int parms[6];
int nparms = 0;
while (nparms < 6) {
char *end;
long n = strtol(p, &end, 10);
if (n == 0 && end == p)
break;
parms[nparms++] = int(n);
p = end;
}
if (csalpha(*p) && (p[1] == '\0' || p[1] == ' ' || p[1] == '\n')) {
error("scaling indicators not allowed in arguments for X import command");
return;
}
while (*p == ' ' || *p == '\n')
p++;
if (nparms < 5) {
if (*p == '\0')
error("too few arguments for X import command");
else
error("invalid argument `%1' for X import command", p);
return;
}
if (*p != '\0') {
error("superfluous argument `%1' for X import command", p);
return;
}
int llx = parms[0];
int lly = parms[1];
int urx = parms[2];
int ury = parms[3];
int desired_width = parms[4];
int desired_height = parms[5];
if (desired_width <= 0) {
error("bad width argument `%1' for X import command: must be > 0",
desired_width);
return;
}
if (nparms == 6 && desired_height <= 0) {
error("bad height argument `%1' for X import command: must be > 0",
desired_height);
return;
}
if (llx == urx) {
error("llx and urx arguments for X import command must not be equal");
return;
}
if (lly == ury) {
error("lly and ury arguments for X import command must not be equal");
return;
}
if (nparms == 5) {
int old_wid = urx - llx;
int old_ht = ury - lly;
if (old_wid < 0)
old_wid = -old_wid;
if (old_ht < 0)
old_ht = -old_ht;
desired_height = int(desired_width*(double(old_ht)/double(old_wid)) + .5);
}
if (env->vpos - desired_height < 0)
warning("top of imported graphic is above the top of the page");
out.put_number(llx)
.put_number(lly)
.put_fix_number(desired_width)
.put_number(urx - llx)
.put_fix_number(-desired_height)
.put_number(ury - lly)
.put_fix_number(env->hpos)
.put_fix_number(env->vpos)
.put_symbol("PBEGIN");
rm.import_file(arg, out);
// do this here just in case application defines PEND
out.put_symbol("end")
.put_symbol("PEND");
}
void ps_printer::draw(int code, int *p, int np, const environment *env)
{
if (invis_count > 0)
return;
flush_sbuf();
int fill_flag = 0;
switch (code) {
case 'C':
fill_flag = 1;
// fall through
case 'c':
// troff adds an extra argument to C
if (np != 1 && !(code == 'C' && np == 2)) {
error("1 argument required for circle");
break;
}
out.put_fix_number(env->hpos + p[0]/2)
.put_fix_number(env->vpos)
.put_fix_number(p[0]/2)
.put_symbol("DC");
if (fill_flag)
fill_path(env);
else {
set_line_thickness_and_color(env);
out.put_symbol("ST");
}
break;
case 'l':
if (np != 2) {
error("2 arguments required for line");
break;
}
set_line_thickness_and_color(env);
out.put_fix_number(p[0] + env->hpos)
.put_fix_number(p[1] + env->vpos)
.put_fix_number(env->hpos)
.put_fix_number(env->vpos)
.put_symbol("DL");
break;
case 'E':
fill_flag = 1;
// fall through
case 'e':
if (np != 2) {
error("2 arguments required for ellipse");
break;
}
out.put_fix_number(p[0])
.put_fix_number(p[1])
.put_fix_number(env->hpos + p[0]/2)
.put_fix_number(env->vpos)
.put_symbol("DE");
if (fill_flag)
fill_path(env);
else {
set_line_thickness_and_color(env);
out.put_symbol("ST");
}
break;
case 'P':
fill_flag = 1;
// fall through
case 'p':
{
if (np & 1) {
error("even number of arguments required for polygon");
break;
}
if (np == 0) {
error("no arguments for polygon");
break;
}
out.put_fix_number(env->hpos)
.put_fix_number(env->vpos)
.put_symbol("MT");
for (int i = 0; i < np; i += 2)
out.put_fix_number(p[i])
.put_fix_number(p[i+1])
.put_symbol("RL");
out.put_symbol("CL");
if (fill_flag)
fill_path(env);
else {
set_line_thickness_and_color(env);
out.put_symbol("ST");
}
break;
}
case '~':
{
if (np & 1) {
error("even number of arguments required for spline");
break;
}
if (np == 0) {
error("no arguments for spline");
break;
}
out.put_fix_number(env->hpos)
.put_fix_number(env->vpos)
.put_symbol("MT");
out.put_fix_number(p[0]/2)
.put_fix_number(p[1]/2)
.put_symbol("RL");
/* tnum/tden should be between 0 and 1; the closer it is to 1
the tighter the curve will be to the guiding lines; 2/3
is the standard value */
const int tnum = 2;
const int tden = 3;
for (int i = 0; i < np - 2; i += 2) {
out.put_fix_number((p[i]*tnum)/(2*tden))
.put_fix_number((p[i + 1]*tnum)/(2*tden))
.put_fix_number(p[i]/2 + (p[i + 2]*(tden - tnum))/(2*tden))
.put_fix_number(p[i + 1]/2 + (p[i + 3]*(tden - tnum))/(2*tden))
.put_fix_number((p[i] - p[i]/2) + p[i + 2]/2)
.put_fix_number((p[i + 1] - p[i + 1]/2) + p[i + 3]/2)
.put_symbol("RC");
}
out.put_fix_number(p[np - 2] - p[np - 2]/2)
.put_fix_number(p[np - 1] - p[np - 1]/2)
.put_symbol("RL");
set_line_thickness_and_color(env);
out.put_symbol("ST");
}
break;
case 'a':
{
if (np != 4) {
error("4 arguments required for arc");
break;
}
set_line_thickness_and_color(env);
double c[2];
if (adjust_arc_center(p, c))
out.put_fix_number(env->hpos + int(c[0]))
.put_fix_number(env->vpos + int(c[1]))
.put_fix_number(int(sqrt(c[0]*c[0] + c[1]*c[1])))
.put_float(degrees(atan2(-c[1], -c[0])))
.put_float(degrees(atan2(p[1] + p[3] - c[1], p[0] + p[2] - c[0])))
.put_symbol("DA");
else
out.put_fix_number(p[0] + p[2] + env->hpos)
.put_fix_number(p[1] + p[3] + env->vpos)
.put_fix_number(env->hpos)
.put_fix_number(env->vpos)
.put_symbol("DL");
}
break;
case 't':
if (np == 0)
line_thickness = -1;
else {
// troff gratuitously adds an extra 0
if (np != 1 && np != 2) {
error("0 or 1 argument required for thickness");
break;
}
line_thickness = p[0];
}
break;
default:
error("unrecognised drawing command `%1'", char(code));
break;
}
output_hpos = output_vpos = -1;
}