43341922 |
1 | /* |
2 | * PostScript backend for Halibut |
3 | */ |
4 | |
5 | #include <assert.h> |
6 | #include "halibut.h" |
7 | #include "paper.h" |
8 | |
b0f1f943 |
9 | static void ps_comment(FILE *fp, char const *leader, word *words); |
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10 | |
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11 | paragraph *ps_config_filename(char *filename) |
12 | { |
e4ea58f8 |
13 | return cmdline_cfg_simple("ps-filename", filename, NULL); |
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14 | } |
15 | |
16 | void ps_backend(paragraph *sourceform, keywordlist *keywords, |
17 | indexdata *idx, void *vdoc) { |
18 | document *doc = (document *)vdoc; |
19 | int font_index; |
20 | font_encoding *fe; |
21 | page_data *page; |
22 | int pageno; |
23 | FILE *fp; |
24 | char *filename; |
25 | paragraph *p; |
26 | |
27 | IGNORE(keywords); |
28 | IGNORE(idx); |
29 | |
30 | filename = dupstr("output.ps"); |
31 | for (p = sourceform; p; p = p->next) { |
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32 | if (p->type == para_Config) { |
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33 | if (!ustricmp(p->keyword, L"ps-filename")) { |
34 | sfree(filename); |
e4ea58f8 |
35 | filename = dupstr(adv(p->origkeyword)); |
43341922 |
36 | } |
37 | } |
38 | } |
39 | |
40 | fp = fopen(filename, "w"); |
41 | if (!fp) { |
42 | error(err_cantopenw, filename); |
43 | return; |
44 | } |
45 | |
b0f1f943 |
46 | fprintf(fp, "%%!PS-Adobe-3.0\n"); |
47 | fprintf(fp, "%%%%Creator: Halibut, %s\n", version); |
48 | fprintf(fp, "%%%%DocumentData: Clean8Bit\n"); |
49 | fprintf(fp, "%%%%LanguageLevel: 1\n"); |
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50 | for (pageno = 0, page = doc->pages; page; page = page->next) |
51 | pageno++; |
52 | fprintf(fp, "%%%%Pages: %d\n", pageno); |
b0f1f943 |
53 | for (p = sourceform; p; p = p->next) |
54 | if (p->type == para_Title) |
55 | ps_comment(fp, "%%Title: ", p->words); |
56 | fprintf(fp, "%%%%DocumentNeededResources:\n"); |
57 | for (fe = doc->fonts->head; fe; fe = fe->next) |
58 | /* XXX This may request the same font multiple times. */ |
59 | fprintf(fp, "%%%%+ font %s\n", fe->font->name); |
60 | fprintf(fp, "%%%%DocumentSuppliedResources: procset Halibut 0 0\n"); |
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61 | fprintf(fp, "%%%%EndComments\n"); |
62 | |
63 | fprintf(fp, "%%%%BeginProlog\n"); |
b0f1f943 |
64 | fprintf(fp, "%%%%BeginResource: procset Halibut 0 0\n"); |
7c8c4239 |
65 | /* |
66 | * Supply a prologue function which allows a reasonably |
67 | * compressed representation of the text on the pages. |
68 | * |
69 | * Expects two arguments: a y-coordinate, and then an array. |
70 | * Elements of the array are processed sequentially as follows: |
71 | * |
72 | * - a number is treated as an x-coordinate |
73 | * - an array is treated as a (font, size) pair |
74 | * - a string is shown |
75 | */ |
76 | fprintf(fp, |
77 | "/t {\n" |
78 | " exch /y exch def {\n" |
79 | " /x exch def\n" |
35c5efa0 |
80 | " x type /arraytype eq {x aload pop scalefont setfont} if\n" |
81 | " x type dup /integertype eq exch /realtype eq or " |
82 | "{x y moveto} if\n" |
83 | " x type /stringtype eq {x show} if\n" |
7c8c4239 |
84 | " } forall\n" |
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85 | "} bind def\n"); |
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86 | |
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87 | fprintf(fp, "%%%%EndResource\n"); |
43341922 |
88 | fprintf(fp, "%%%%EndProlog\n"); |
89 | |
90 | fprintf(fp, "%%%%BeginSetup\n"); |
09358aa7 |
91 | |
92 | /* |
93 | * This is as good a place as any to put version IDs. |
94 | */ |
95 | for (p = sourceform; p; p = p->next) |
96 | if (p->type == para_VersionID) |
b0f1f943 |
97 | ps_comment(fp, "% ", p->words); |
98 | |
99 | for (fe = doc->fonts->head; fe; fe = fe->next) |
100 | /* XXX This may request the same font multiple times. */ |
101 | fprintf(fp, "%%%%IncludeResource: font %s\n", fe->font->name); |
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102 | |
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103 | /* |
104 | * Re-encode and re-metric the fonts. |
105 | */ |
106 | font_index = 0; |
107 | for (fe = doc->fonts->head; fe; fe = fe->next) { |
108 | char fname[40]; |
109 | int i; |
110 | |
111 | sprintf(fname, "f%d", font_index++); |
112 | fe->name = dupstr(fname); |
113 | |
114 | fprintf(fp, "/%s findfont dup length dict begin\n", fe->font->name); |
115 | fprintf(fp, "{1 index /FID ne {def} {pop pop} ifelse} forall\n"); |
116 | fprintf(fp, "/Encoding [\n"); |
117 | for (i = 0; i < 256; i++) |
118 | fprintf(fp, "/%s\n", fe->vector[i] ? fe->vector[i] : ".notdef"); |
119 | fprintf(fp, "] def /Metrics 256 dict dup begin\n"); |
120 | for (i = 0; i < 256; i++) { |
121 | if (fe->indices[i] >= 0) { |
122 | double width = fe->font->widths[fe->indices[i]]; |
123 | fprintf(fp, "/%s %g def\n", fe->vector[i], |
124 | 1000.0 * width / 4096.0); |
125 | } |
126 | } |
127 | fprintf(fp, "end def currentdict end\n"); |
128 | fprintf(fp, "/fontname-%s exch definefont /%s exch def\n\n", |
129 | fe->name, fe->name); |
130 | } |
131 | fprintf(fp, "%%%%EndSetup\n"); |
132 | |
133 | /* |
23765aeb |
134 | * Output the text and graphics. |
43341922 |
135 | */ |
136 | pageno = 0; |
137 | for (page = doc->pages; page; page = page->next) { |
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138 | text_fragment *frag, *frag_end; |
23765aeb |
139 | rect *r; |
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140 | |
141 | pageno++; |
142 | fprintf(fp, "%%%%Page: %d %d\n", pageno, pageno); |
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143 | |
138d7ffb |
144 | #if 0 |
145 | { |
146 | xref *xr; |
147 | /* |
148 | * I used this diagnostic briefly to ensure that |
149 | * cross-reference rectangles were being put where they |
150 | * should be. |
151 | */ |
152 | for (xr = page->first_xref; xr; xr = xr->next) { |
153 | fprintf(fp, "gsave 0.7 setgray %g %g moveto", |
154 | xr->lx/4096.0, xr->ty/4096.0); |
155 | fprintf(fp, " %g %g lineto %g %g lineto", |
156 | xr->lx/4096.0, xr->by/4096.0, |
157 | xr->rx/4096.0, xr->by/4096.0); |
158 | fprintf(fp, " %g %g lineto closepath fill grestore\n", |
159 | xr->rx/4096.0, xr->ty/4096.0); |
160 | } |
161 | } |
162 | #endif |
163 | |
23765aeb |
164 | for (r = page->first_rect; r; r = r->next) { |
165 | fprintf(fp, "%g %g moveto %g 0 rlineto 0 %g rlineto " |
166 | "-%g 0 rlineto closepath fill\n", |
167 | r->x / 4096.0, r->y / 4096.0, r->w / 4096.0, |
168 | r->h / 4096.0, r->w / 4096.0); |
169 | } |
170 | |
7c8c4239 |
171 | frag = page->first_text; |
172 | while (frag) { |
173 | font_encoding *fe; |
174 | int fs; |
43341922 |
175 | char *c; |
176 | |
7c8c4239 |
177 | /* |
178 | * Collect all the adjacent text fragments with the |
179 | * same y-coordinate. |
180 | */ |
181 | for (frag_end = frag; |
182 | frag_end && frag_end->y == frag->y; |
183 | frag_end = frag_end->next); |
184 | |
185 | fprintf(fp, "%g[", frag->y / 4096.0); |
186 | |
187 | fe = NULL; |
188 | fs = -1; |
189 | |
190 | while (frag && frag != frag_end) { |
191 | |
192 | if (frag->fe != fe || frag->fontsize != fs) |
193 | fprintf(fp, "[%s %d]", frag->fe->name, frag->fontsize); |
194 | fe = frag->fe; |
195 | fs = frag->fontsize; |
196 | |
197 | fprintf(fp, "%g(", frag->x/4096.0); |
198 | for (c = frag->text; *c; c++) { |
199 | if (*c == '(' || *c == ')' || *c == '\\') |
200 | fputc('\\', fp); |
201 | fputc(*c, fp); |
202 | } |
203 | fprintf(fp, ")"); |
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204 | |
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205 | frag = frag->next; |
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206 | } |
207 | |
7c8c4239 |
208 | fprintf(fp, "]t\n"); |
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209 | } |
210 | |
211 | fprintf(fp, "showpage\n"); |
212 | } |
213 | |
214 | fprintf(fp, "%%%%EOF\n"); |
215 | |
216 | fclose(fp); |
217 | |
218 | sfree(filename); |
219 | } |
09358aa7 |
220 | |
b0f1f943 |
221 | static void ps_comment(FILE *fp, char const *leader, word *words) |
09358aa7 |
222 | { |
b0f1f943 |
223 | fprintf(fp, "%s", leader); |
09358aa7 |
224 | |
225 | for (; words; words = words->next) { |
226 | char *text; |
227 | int type; |
228 | |
229 | switch (words->type) { |
230 | case word_HyperLink: |
231 | case word_HyperEnd: |
232 | case word_UpperXref: |
233 | case word_LowerXref: |
234 | case word_XrefEnd: |
235 | case word_IndexRef: |
236 | continue; |
237 | } |
238 | |
239 | type = removeattr(words->type); |
240 | |
241 | switch (type) { |
242 | case word_Normal: |
e4ea58f8 |
243 | text = utoa_dup(words->text, CS_ASCII); |
09358aa7 |
244 | break; |
245 | case word_WhiteSpace: |
246 | text = dupstr(" "); |
247 | break; |
248 | case word_Quote: |
249 | text = dupstr("'"); |
250 | break; |
251 | } |
252 | |
253 | fputs(text, fp); |
254 | sfree(text); |
255 | } |
256 | |
257 | fprintf(fp, "\n"); |
258 | } |