1 #include "mupdf/fitz.h"
2 #include "html-imp.h"
3
4 #include <string.h>
5
6 static fz_font *
fz_load_html_default_font(fz_context * ctx,fz_html_font_set * set,const char * family,int is_bold,int is_italic)7 fz_load_html_default_font(fz_context *ctx, fz_html_font_set *set, const char *family, int is_bold, int is_italic)
8 {
9 int is_mono = !strcmp(family, "monospace");
10 int is_sans = !strcmp(family, "sans-serif");
11 const char *real_family = is_mono ? "Courier" : is_sans ? "Helvetica" : "Charis SIL";
12 const char *backup_family = is_mono ? "Courier" : is_sans ? "Helvetica" : "Times";
13 int idx = (is_mono ? 8 : is_sans ? 4 : 0) + is_bold * 2 + is_italic;
14 if (!set->fonts[idx])
15 {
16 const unsigned char *data;
17 int size;
18
19 data = fz_lookup_builtin_font(ctx, real_family, is_bold, is_italic, &size);
20 if (!data)
21 data = fz_lookup_builtin_font(ctx, backup_family, is_bold, is_italic, &size);
22 if (!data)
23 fz_throw(ctx, FZ_ERROR_GENERIC, "cannot load html font: %s", real_family);
24 set->fonts[idx] = fz_new_font_from_memory(ctx, NULL, data, size, 0, 1);
25 fz_font_flags(set->fonts[idx])->is_serif = !is_sans;
26 }
27 return set->fonts[idx];
28 }
29
30 void
fz_add_html_font_face(fz_context * ctx,fz_html_font_set * set,const char * family,int is_bold,int is_italic,int is_small_caps,const char * src,fz_font * font)31 fz_add_html_font_face(fz_context *ctx, fz_html_font_set *set,
32 const char *family, int is_bold, int is_italic, int is_small_caps,
33 const char *src, fz_font *font)
34 {
35 fz_html_font_face *custom = fz_malloc_struct(ctx, fz_html_font_face);
36 custom->font = fz_keep_font(ctx, font);
37 custom->src = fz_strdup(ctx, src);
38 custom->family = fz_strdup(ctx, family);
39 custom->is_bold = is_bold;
40 custom->is_italic = is_italic;
41 custom->is_small_caps = is_small_caps;
42 custom->next = set->custom;
43 set->custom = custom;
44 }
45
46 fz_font *
fz_load_html_font(fz_context * ctx,fz_html_font_set * set,const char * family,int is_bold,int is_italic,int is_small_caps)47 fz_load_html_font(fz_context *ctx, fz_html_font_set *set,
48 const char *family, int is_bold, int is_italic, int is_small_caps)
49 {
50 fz_html_font_face *custom;
51 const unsigned char *data;
52 int best_score = 0;
53 fz_font *best_font = NULL;
54 int size;
55
56 for (custom = set->custom; custom; custom = custom->next)
57 {
58 if (!strcmp(family, custom->family))
59 {
60 int score =
61 1 * (is_bold == custom->is_bold) +
62 2 * (is_italic == custom->is_italic) +
63 4 * (is_small_caps == custom->is_small_caps);
64 if (score > best_score)
65 {
66 best_score = score;
67 best_font = custom->font;
68 }
69 }
70 }
71 if (best_font)
72 return best_font;
73
74 data = fz_lookup_builtin_font(ctx, family, is_bold, is_italic, &size);
75 if (data)
76 {
77 fz_font *font = fz_new_font_from_memory(ctx, NULL, data, size, 0, 0);
78 fz_font_flags_t *flags = fz_font_flags(font);
79 if (is_bold && !flags->is_bold)
80 flags->fake_bold = 1;
81 if (is_italic && !flags->is_italic)
82 flags->fake_italic = 1;
83 fz_add_html_font_face(ctx, set, family, is_bold, is_italic, 0, "<builtin>", font);
84 fz_drop_font(ctx, font);
85 return font;
86 }
87
88 if (!strcmp(family, "monospace") || !strcmp(family, "sans-serif") || !strcmp(family, "serif"))
89 return fz_load_html_default_font(ctx, set, family, is_bold, is_italic);
90
91 return NULL;
92 }
93
fz_new_html_font_set(fz_context * ctx)94 fz_html_font_set *fz_new_html_font_set(fz_context *ctx)
95 {
96 return fz_malloc_struct(ctx, fz_html_font_set);
97 }
98
fz_drop_html_font_set(fz_context * ctx,fz_html_font_set * set)99 void fz_drop_html_font_set(fz_context *ctx, fz_html_font_set *set)
100 {
101 fz_html_font_face *font, *next;
102 int i;
103
104 if (!set)
105 return;
106
107 font = set->custom;
108 while (font)
109 {
110 next = font->next;
111 fz_drop_font(ctx, font->font);
112 fz_free(ctx, font->src);
113 fz_free(ctx, font->family);
114 fz_free(ctx, font);
115 font = next;
116 }
117
118 for (i = 0; i < (int)nelem(set->fonts); ++i)
119 fz_drop_font(ctx, set->fonts[i]);
120
121 fz_free(ctx, set);
122 }
123