43341922 |
1 | /* |
2 | * PostScript backend for Halibut |
3 | */ |
4 | |
5 | #include <assert.h> |
6 | #include "halibut.h" |
7 | #include "paper.h" |
8 | |
09358aa7 |
9 | static void ps_versionid(FILE *fp, word *words); |
10 | |
43341922 |
11 | paragraph *ps_config_filename(char *filename) |
12 | { |
13 | paragraph *p; |
14 | wchar_t *ufilename, *up; |
15 | int len; |
16 | |
17 | p = mknew(paragraph); |
18 | memset(p, 0, sizeof(*p)); |
19 | p->type = para_Config; |
20 | p->next = NULL; |
21 | p->fpos.filename = "<command line>"; |
22 | p->fpos.line = p->fpos.col = -1; |
23 | |
24 | ufilename = ufroma_dup(filename); |
25 | len = ustrlen(ufilename) + 2 + lenof(L"ps-filename"); |
26 | p->keyword = mknewa(wchar_t, len); |
27 | up = p->keyword; |
28 | ustrcpy(up, L"ps-filename"); |
29 | up = uadv(up); |
30 | ustrcpy(up, ufilename); |
31 | up = uadv(up); |
32 | *up = L'\0'; |
33 | assert(up - p->keyword < len); |
34 | sfree(ufilename); |
35 | |
36 | return p; |
37 | } |
38 | |
39 | void ps_backend(paragraph *sourceform, keywordlist *keywords, |
40 | indexdata *idx, void *vdoc) { |
41 | document *doc = (document *)vdoc; |
42 | int font_index; |
43 | font_encoding *fe; |
44 | page_data *page; |
45 | int pageno; |
46 | FILE *fp; |
47 | char *filename; |
48 | paragraph *p; |
49 | |
50 | IGNORE(keywords); |
51 | IGNORE(idx); |
52 | |
53 | filename = dupstr("output.ps"); |
54 | for (p = sourceform; p; p = p->next) { |
43341922 |
55 | if (p->type == para_Config && p->parent) { |
56 | if (!ustricmp(p->keyword, L"ps-filename")) { |
57 | sfree(filename); |
58 | filename = utoa_dup(uadv(p->keyword)); |
59 | } |
60 | } |
61 | } |
62 | |
63 | fp = fopen(filename, "w"); |
64 | if (!fp) { |
65 | error(err_cantopenw, filename); |
66 | return; |
67 | } |
68 | |
69 | fprintf(fp, "%%!PS-Adobe-1.0\n"); |
70 | for (pageno = 0, page = doc->pages; page; page = page->next) |
71 | pageno++; |
72 | fprintf(fp, "%%%%Pages: %d\n", pageno); |
73 | fprintf(fp, "%%%%EndComments\n"); |
74 | |
75 | fprintf(fp, "%%%%BeginProlog\n"); |
7c8c4239 |
76 | /* |
77 | * Supply a prologue function which allows a reasonably |
78 | * compressed representation of the text on the pages. |
79 | * |
80 | * Expects two arguments: a y-coordinate, and then an array. |
81 | * Elements of the array are processed sequentially as follows: |
82 | * |
83 | * - a number is treated as an x-coordinate |
84 | * - an array is treated as a (font, size) pair |
85 | * - a string is shown |
86 | */ |
87 | fprintf(fp, |
88 | "/t {\n" |
89 | " exch /y exch def {\n" |
90 | " /x 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" |
94 | " } forall\n" |
95 | "} def\n"); |
96 | |
43341922 |
97 | fprintf(fp, "%%%%EndProlog\n"); |
98 | |
99 | fprintf(fp, "%%%%BeginSetup\n"); |
09358aa7 |
100 | |
101 | /* |
102 | * This is as good a place as any to put version IDs. |
103 | */ |
104 | for (p = sourceform; p; p = p->next) |
105 | if (p->type == para_VersionID) |
106 | ps_versionid(fp, p->words); |
107 | |
43341922 |
108 | /* |
109 | * Re-encode and re-metric the fonts. |
110 | */ |
111 | font_index = 0; |
112 | for (fe = doc->fonts->head; fe; fe = fe->next) { |
113 | char fname[40]; |
114 | int i; |
115 | |
116 | sprintf(fname, "f%d", font_index++); |
117 | fe->name = dupstr(fname); |
118 | |
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); |
130 | } |
131 | } |
132 | fprintf(fp, "end def currentdict end\n"); |
133 | fprintf(fp, "/fontname-%s exch definefont /%s exch def\n\n", |
134 | fe->name, fe->name); |
135 | } |
136 | fprintf(fp, "%%%%EndSetup\n"); |
137 | |
138 | /* |
23765aeb |
139 | * Output the text and graphics. |
43341922 |
140 | */ |
141 | pageno = 0; |
142 | for (page = doc->pages; page; page = page->next) { |
7c8c4239 |
143 | text_fragment *frag, *frag_end; |
23765aeb |
144 | rect *r; |
43341922 |
145 | |
146 | pageno++; |
147 | fprintf(fp, "%%%%Page: %d %d\n", pageno, pageno); |
148 | fprintf(fp, "%%%%BeginPageSetup\n"); |
149 | fprintf(fp, "%%%%EndPageSetup\n"); |
150 | |
138d7ffb |
151 | #if 0 |
152 | { |
153 | xref *xr; |
154 | /* |
155 | * I used this diagnostic briefly to ensure that |
156 | * cross-reference rectangles were being put where they |
157 | * should be. |
158 | */ |
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); |
167 | } |
168 | } |
169 | #endif |
170 | |
23765aeb |
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); |
176 | } |
177 | |
7c8c4239 |
178 | frag = page->first_text; |
179 | while (frag) { |
180 | font_encoding *fe; |
181 | int fs; |
43341922 |
182 | char *c; |
183 | |
7c8c4239 |
184 | /* |
185 | * Collect all the adjacent text fragments with the |
186 | * same y-coordinate. |
187 | */ |
188 | for (frag_end = frag; |
189 | frag_end && frag_end->y == frag->y; |
190 | frag_end = frag_end->next); |
191 | |
192 | fprintf(fp, "%g[", frag->y / 4096.0); |
193 | |
194 | fe = NULL; |
195 | fs = -1; |
196 | |
197 | while (frag && frag != frag_end) { |
198 | |
199 | if (frag->fe != fe || frag->fontsize != fs) |
200 | fprintf(fp, "[%s %d]", frag->fe->name, frag->fontsize); |
201 | fe = frag->fe; |
202 | fs = frag->fontsize; |
203 | |
204 | fprintf(fp, "%g(", frag->x/4096.0); |
205 | for (c = frag->text; *c; c++) { |
206 | if (*c == '(' || *c == ')' || *c == '\\') |
207 | fputc('\\', fp); |
208 | fputc(*c, fp); |
209 | } |
210 | fprintf(fp, ")"); |
43341922 |
211 | |
7c8c4239 |
212 | frag = frag->next; |
43341922 |
213 | } |
214 | |
7c8c4239 |
215 | fprintf(fp, "]t\n"); |
43341922 |
216 | } |
217 | |
218 | fprintf(fp, "showpage\n"); |
219 | } |
220 | |
221 | fprintf(fp, "%%%%EOF\n"); |
222 | |
223 | fclose(fp); |
224 | |
225 | sfree(filename); |
226 | } |
09358aa7 |
227 | |
228 | static void ps_versionid(FILE *fp, word *words) |
229 | { |
230 | fprintf(fp, "%% "); |
231 | |
232 | for (; words; words = words->next) { |
233 | char *text; |
234 | int type; |
235 | |
236 | switch (words->type) { |
237 | case word_HyperLink: |
238 | case word_HyperEnd: |
239 | case word_UpperXref: |
240 | case word_LowerXref: |
241 | case word_XrefEnd: |
242 | case word_IndexRef: |
243 | continue; |
244 | } |
245 | |
246 | type = removeattr(words->type); |
247 | |
248 | switch (type) { |
249 | case word_Normal: |
250 | text = utoa_dup(words->text); |
251 | break; |
252 | case word_WhiteSpace: |
253 | text = dupstr(" "); |
254 | break; |
255 | case word_Quote: |
256 | text = dupstr("'"); |
257 | break; |
258 | } |
259 | |
260 | fputs(text, fp); |
261 | sfree(text); |
262 | } |
263 | |
264 | fprintf(fp, "\n"); |
265 | } |