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 | { |
e4ea58f8 |
13 | return cmdline_cfg_simple("ps-filename", filename, NULL); |
43341922 |
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) { |
43341922 |
32 | if (p->type == para_Config && p->parent) { |
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 | |
46 | fprintf(fp, "%%!PS-Adobe-1.0\n"); |
47 | for (pageno = 0, page = doc->pages; page; page = page->next) |
48 | pageno++; |
49 | fprintf(fp, "%%%%Pages: %d\n", pageno); |
50 | fprintf(fp, "%%%%EndComments\n"); |
51 | |
52 | fprintf(fp, "%%%%BeginProlog\n"); |
7c8c4239 |
53 | /* |
54 | * Supply a prologue function which allows a reasonably |
55 | * compressed representation of the text on the pages. |
56 | * |
57 | * Expects two arguments: a y-coordinate, and then an array. |
58 | * Elements of the array are processed sequentially as follows: |
59 | * |
60 | * - a number is treated as an x-coordinate |
61 | * - an array is treated as a (font, size) pair |
62 | * - a string is shown |
63 | */ |
64 | fprintf(fp, |
65 | "/t {\n" |
66 | " exch /y exch def {\n" |
67 | " /x exch def\n" |
68 | " x type [] type eq {x aload pop scalefont setfont} if\n" |
69 | " x type dup 1 type eq exch 1.0 type eq or {x y moveto} if\n" |
70 | " x type () type eq {x show} if\n" |
71 | " } forall\n" |
72 | "} def\n"); |
73 | |
43341922 |
74 | fprintf(fp, "%%%%EndProlog\n"); |
75 | |
76 | fprintf(fp, "%%%%BeginSetup\n"); |
09358aa7 |
77 | |
78 | /* |
79 | * This is as good a place as any to put version IDs. |
80 | */ |
81 | for (p = sourceform; p; p = p->next) |
82 | if (p->type == para_VersionID) |
83 | ps_versionid(fp, p->words); |
84 | |
43341922 |
85 | /* |
86 | * Re-encode and re-metric the fonts. |
87 | */ |
88 | font_index = 0; |
89 | for (fe = doc->fonts->head; fe; fe = fe->next) { |
90 | char fname[40]; |
91 | int i; |
92 | |
93 | sprintf(fname, "f%d", font_index++); |
94 | fe->name = dupstr(fname); |
95 | |
96 | fprintf(fp, "/%s findfont dup length dict begin\n", fe->font->name); |
97 | fprintf(fp, "{1 index /FID ne {def} {pop pop} ifelse} forall\n"); |
98 | fprintf(fp, "/Encoding [\n"); |
99 | for (i = 0; i < 256; i++) |
100 | fprintf(fp, "/%s\n", fe->vector[i] ? fe->vector[i] : ".notdef"); |
101 | fprintf(fp, "] def /Metrics 256 dict dup begin\n"); |
102 | for (i = 0; i < 256; i++) { |
103 | if (fe->indices[i] >= 0) { |
104 | double width = fe->font->widths[fe->indices[i]]; |
105 | fprintf(fp, "/%s %g def\n", fe->vector[i], |
106 | 1000.0 * width / 4096.0); |
107 | } |
108 | } |
109 | fprintf(fp, "end def currentdict end\n"); |
110 | fprintf(fp, "/fontname-%s exch definefont /%s exch def\n\n", |
111 | fe->name, fe->name); |
112 | } |
113 | fprintf(fp, "%%%%EndSetup\n"); |
114 | |
115 | /* |
23765aeb |
116 | * Output the text and graphics. |
43341922 |
117 | */ |
118 | pageno = 0; |
119 | for (page = doc->pages; page; page = page->next) { |
7c8c4239 |
120 | text_fragment *frag, *frag_end; |
23765aeb |
121 | rect *r; |
43341922 |
122 | |
123 | pageno++; |
124 | fprintf(fp, "%%%%Page: %d %d\n", pageno, pageno); |
125 | fprintf(fp, "%%%%BeginPageSetup\n"); |
126 | fprintf(fp, "%%%%EndPageSetup\n"); |
127 | |
138d7ffb |
128 | #if 0 |
129 | { |
130 | xref *xr; |
131 | /* |
132 | * I used this diagnostic briefly to ensure that |
133 | * cross-reference rectangles were being put where they |
134 | * should be. |
135 | */ |
136 | for (xr = page->first_xref; xr; xr = xr->next) { |
137 | fprintf(fp, "gsave 0.7 setgray %g %g moveto", |
138 | xr->lx/4096.0, xr->ty/4096.0); |
139 | fprintf(fp, " %g %g lineto %g %g lineto", |
140 | xr->lx/4096.0, xr->by/4096.0, |
141 | xr->rx/4096.0, xr->by/4096.0); |
142 | fprintf(fp, " %g %g lineto closepath fill grestore\n", |
143 | xr->rx/4096.0, xr->ty/4096.0); |
144 | } |
145 | } |
146 | #endif |
147 | |
23765aeb |
148 | for (r = page->first_rect; r; r = r->next) { |
149 | fprintf(fp, "%g %g moveto %g 0 rlineto 0 %g rlineto " |
150 | "-%g 0 rlineto closepath fill\n", |
151 | r->x / 4096.0, r->y / 4096.0, r->w / 4096.0, |
152 | r->h / 4096.0, r->w / 4096.0); |
153 | } |
154 | |
7c8c4239 |
155 | frag = page->first_text; |
156 | while (frag) { |
157 | font_encoding *fe; |
158 | int fs; |
43341922 |
159 | char *c; |
160 | |
7c8c4239 |
161 | /* |
162 | * Collect all the adjacent text fragments with the |
163 | * same y-coordinate. |
164 | */ |
165 | for (frag_end = frag; |
166 | frag_end && frag_end->y == frag->y; |
167 | frag_end = frag_end->next); |
168 | |
169 | fprintf(fp, "%g[", frag->y / 4096.0); |
170 | |
171 | fe = NULL; |
172 | fs = -1; |
173 | |
174 | while (frag && frag != frag_end) { |
175 | |
176 | if (frag->fe != fe || frag->fontsize != fs) |
177 | fprintf(fp, "[%s %d]", frag->fe->name, frag->fontsize); |
178 | fe = frag->fe; |
179 | fs = frag->fontsize; |
180 | |
181 | fprintf(fp, "%g(", frag->x/4096.0); |
182 | for (c = frag->text; *c; c++) { |
183 | if (*c == '(' || *c == ')' || *c == '\\') |
184 | fputc('\\', fp); |
185 | fputc(*c, fp); |
186 | } |
187 | fprintf(fp, ")"); |
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188 | |
7c8c4239 |
189 | frag = frag->next; |
43341922 |
190 | } |
191 | |
7c8c4239 |
192 | fprintf(fp, "]t\n"); |
43341922 |
193 | } |
194 | |
195 | fprintf(fp, "showpage\n"); |
196 | } |
197 | |
198 | fprintf(fp, "%%%%EOF\n"); |
199 | |
200 | fclose(fp); |
201 | |
202 | sfree(filename); |
203 | } |
09358aa7 |
204 | |
205 | static void ps_versionid(FILE *fp, word *words) |
206 | { |
207 | fprintf(fp, "%% "); |
208 | |
209 | for (; words; words = words->next) { |
210 | char *text; |
211 | int type; |
212 | |
213 | switch (words->type) { |
214 | case word_HyperLink: |
215 | case word_HyperEnd: |
216 | case word_UpperXref: |
217 | case word_LowerXref: |
218 | case word_XrefEnd: |
219 | case word_IndexRef: |
220 | continue; |
221 | } |
222 | |
223 | type = removeattr(words->type); |
224 | |
225 | switch (type) { |
226 | case word_Normal: |
e4ea58f8 |
227 | text = utoa_dup(words->text, CS_ASCII); |
09358aa7 |
228 | break; |
229 | case word_WhiteSpace: |
230 | text = dupstr(" "); |
231 | break; |
232 | case word_Quote: |
233 | text = dupstr("'"); |
234 | break; |
235 | } |
236 | |
237 | fputs(text, fp); |
238 | sfree(text); |
239 | } |
240 | |
241 | fprintf(fp, "\n"); |
242 | } |