2 * PostScript backend for Halibut
9 static void ps_versionid(FILE *fp
, word
*words
);
11 paragraph
*ps_config_filename(char *filename
)
14 wchar_t *ufilename
, *up
;
18 memset(p
, 0, sizeof(*p
));
19 p
->type
= para_Config
;
21 p
->fpos
.filename
= "<command line>";
22 p
->fpos
.line
= p
->fpos
.col
= -1;
24 ufilename
= ufroma_dup(filename
);
25 len
= ustrlen(ufilename
) + 2 + lenof(L
"ps-filename");
26 p
->keyword
= mknewa(wchar_t, len
);
28 ustrcpy(up
, L
"ps-filename");
30 ustrcpy(up
, ufilename
);
33 assert(up
- p
->keyword
< len
);
39 void ps_backend(paragraph
*sourceform
, keywordlist
*keywords
,
40 indexdata
*idx
, void *vdoc
) {
41 document
*doc
= (document
*)vdoc
;
53 filename
= dupstr("output.ps");
54 for (p
= sourceform
; p
; p
= p
->next
) {
55 if (p
->type
== para_Config
&& p
->parent
) {
56 if (!ustricmp(p
->keyword
, L
"ps-filename")) {
58 filename
= utoa_dup(uadv(p
->keyword
));
63 fp
= fopen(filename
, "w");
65 error(err_cantopenw
, filename
);
69 fprintf(fp
, "%%!PS-Adobe-1.0\n");
70 for (pageno
= 0, page
= doc
->pages
; page
; page
= page
->next
)
72 fprintf(fp
, "%%%%Pages: %d\n", pageno
);
73 fprintf(fp
, "%%%%EndComments\n");
75 fprintf(fp
, "%%%%BeginProlog\n");
77 * Supply a prologue function which allows a reasonably
78 * compressed representation of the text on the pages.
80 * Expects two arguments: a y-coordinate, and then an array.
81 * Elements of the array are processed sequentially as follows:
83 * - a number is treated as an x-coordinate
84 * - an array is treated as a (font, size) pair
89 " exch /y exch def {\n"
91 " x type [] type eq {x aload pop scalefont setfont} if\n"
92 " x type dup 1 type eq exch 1.0 type eq or {x y moveto} if\n"
93 " x type () type eq {x show} if\n"
97 fprintf(fp
, "%%%%EndProlog\n");
99 fprintf(fp
, "%%%%BeginSetup\n");
102 * This is as good a place as any to put version IDs.
104 for (p
= sourceform
; p
; p
= p
->next
)
105 if (p
->type
== para_VersionID
)
106 ps_versionid(fp
, p
->words
);
109 * Re-encode and re-metric the fonts.
112 for (fe
= doc
->fonts
->head
; fe
; fe
= fe
->next
) {
116 sprintf(fname
, "f%d", font_index
++);
117 fe
->name
= dupstr(fname
);
119 fprintf(fp
, "/%s findfont dup length dict begin\n", fe
->font
->name
);
120 fprintf(fp
, "{1 index /FID ne {def} {pop pop} ifelse} forall\n");
121 fprintf(fp
, "/Encoding [\n");
122 for (i
= 0; i
< 256; i
++)
123 fprintf(fp
, "/%s\n", fe
->vector
[i
] ? fe
->vector
[i
] : ".notdef");
124 fprintf(fp
, "] def /Metrics 256 dict dup begin\n");
125 for (i
= 0; i
< 256; i
++) {
126 if (fe
->indices
[i
] >= 0) {
127 double width
= fe
->font
->widths
[fe
->indices
[i
]];
128 fprintf(fp
, "/%s %g def\n", fe
->vector
[i
],
129 1000.0 * width
/ 4096.0);
132 fprintf(fp
, "end def currentdict end\n");
133 fprintf(fp
, "/fontname-%s exch definefont /%s exch def\n\n",
136 fprintf(fp
, "%%%%EndSetup\n");
139 * Output the text and graphics.
142 for (page
= doc
->pages
; page
; page
= page
->next
) {
143 text_fragment
*frag
, *frag_end
;
147 fprintf(fp
, "%%%%Page: %d %d\n", pageno
, pageno
);
148 fprintf(fp
, "%%%%BeginPageSetup\n");
149 fprintf(fp
, "%%%%EndPageSetup\n");
155 * I used this diagnostic briefly to ensure that
156 * cross-reference rectangles were being put where they
159 for (xr
= page
->first_xref
; xr
; xr
= xr
->next
) {
160 fprintf(fp
, "gsave 0.7 setgray %g %g moveto",
161 xr
->lx
/4096.0, xr
->ty
/4096.0);
162 fprintf(fp
, " %g %g lineto %g %g lineto",
163 xr
->lx
/4096.0, xr
->by
/4096.0,
164 xr
->rx
/4096.0, xr
->by
/4096.0);
165 fprintf(fp
, " %g %g lineto closepath fill grestore\n",
166 xr
->rx
/4096.0, xr
->ty
/4096.0);
171 for (r
= page
->first_rect
; r
; r
= r
->next
) {
172 fprintf(fp
, "%g %g moveto %g 0 rlineto 0 %g rlineto "
173 "-%g 0 rlineto closepath fill\n",
174 r
->x
/ 4096.0, r
->y
/ 4096.0, r
->w
/ 4096.0,
175 r
->h
/ 4096.0, r
->w
/ 4096.0);
178 frag
= page
->first_text
;
185 * Collect all the adjacent text fragments with the
188 for (frag_end
= frag
;
189 frag_end
&& frag_end
->y
== frag
->y
;
190 frag_end
= frag_end
->next
);
192 fprintf(fp
, "%g[", frag
->y
/ 4096.0);
197 while (frag
&& frag
!= frag_end
) {
199 if (frag
->fe
!= fe
|| frag
->fontsize
!= fs
)
200 fprintf(fp
, "[%s %d]", frag
->fe
->name
, frag
->fontsize
);
204 fprintf(fp
, "%g(", frag
->x
/4096.0);
205 for (c
= frag
->text
; *c
; c
++) {
206 if (*c
== '(' || *c
== ')' || *c
== '\\')
218 fprintf(fp
, "showpage\n");
221 fprintf(fp
, "%%%%EOF\n");
228 static void ps_versionid(FILE *fp
, word
*words
)
232 for (; words
; words
= words
->next
) {
236 switch (words
->type
) {
246 type
= removeattr(words
->type
);
250 text
= utoa_dup(words
->text
);
252 case word_WhiteSpace
: