1 #include "mupdf/fitz.h"
2 #include "mupdf/pdf.h"
3
4 #include <stdlib.h>
5
6 void
pdf_set_font_wmode(fz_context * ctx,pdf_font_desc * font,int wmode)7 pdf_set_font_wmode(fz_context *ctx, pdf_font_desc *font, int wmode)
8 {
9 font->wmode = wmode;
10 }
11
12 void
pdf_set_default_hmtx(fz_context * ctx,pdf_font_desc * font,int w)13 pdf_set_default_hmtx(fz_context *ctx, pdf_font_desc *font, int w)
14 {
15 font->dhmtx.w = w;
16 }
17
18 void
pdf_set_default_vmtx(fz_context * ctx,pdf_font_desc * font,int y,int w)19 pdf_set_default_vmtx(fz_context *ctx, pdf_font_desc *font, int y, int w)
20 {
21 font->dvmtx.y = y;
22 font->dvmtx.w = w;
23 }
24
25 void
pdf_add_hmtx(fz_context * ctx,pdf_font_desc * font,int lo,int hi,int w)26 pdf_add_hmtx(fz_context *ctx, pdf_font_desc *font, int lo, int hi, int w)
27 {
28 if (font->hmtx_len + 1 >= font->hmtx_cap)
29 {
30 int new_cap = font->hmtx_cap + 16;
31 font->hmtx = fz_realloc_array(ctx, font->hmtx, new_cap, pdf_hmtx);
32 font->hmtx_cap = new_cap;
33 }
34
35 font->hmtx[font->hmtx_len].lo = lo;
36 font->hmtx[font->hmtx_len].hi = hi;
37 font->hmtx[font->hmtx_len].w = w;
38 font->hmtx_len++;
39 }
40
41 void
pdf_add_vmtx(fz_context * ctx,pdf_font_desc * font,int lo,int hi,int x,int y,int w)42 pdf_add_vmtx(fz_context *ctx, pdf_font_desc *font, int lo, int hi, int x, int y, int w)
43 {
44 if (font->vmtx_len + 1 >= font->vmtx_cap)
45 {
46 int new_cap = font->vmtx_cap + 16;
47 font->vmtx = fz_realloc_array(ctx, font->vmtx, new_cap, pdf_vmtx);
48 font->vmtx_cap = new_cap;
49 }
50
51 font->vmtx[font->vmtx_len].lo = lo;
52 font->vmtx[font->vmtx_len].hi = hi;
53 font->vmtx[font->vmtx_len].x = x;
54 font->vmtx[font->vmtx_len].y = y;
55 font->vmtx[font->vmtx_len].w = w;
56 font->vmtx_len++;
57 }
58
cmph(const void * a0,const void * b0)59 static int cmph(const void *a0, const void *b0)
60 {
61 pdf_hmtx *a = (pdf_hmtx*)a0;
62 pdf_hmtx *b = (pdf_hmtx*)b0;
63 return a->lo - b->lo;
64 }
65
cmpv(const void * a0,const void * b0)66 static int cmpv(const void *a0, const void *b0)
67 {
68 pdf_vmtx *a = (pdf_vmtx*)a0;
69 pdf_vmtx *b = (pdf_vmtx*)b0;
70 return a->lo - b->lo;
71 }
72
73 void
pdf_end_hmtx(fz_context * ctx,pdf_font_desc * font)74 pdf_end_hmtx(fz_context *ctx, pdf_font_desc *font)
75 {
76 if (!font->hmtx)
77 return;
78 qsort(font->hmtx, font->hmtx_len, sizeof(pdf_hmtx), cmph);
79 font->size += font->hmtx_cap * sizeof(pdf_hmtx);
80 }
81
82 void
pdf_end_vmtx(fz_context * ctx,pdf_font_desc * font)83 pdf_end_vmtx(fz_context *ctx, pdf_font_desc *font)
84 {
85 if (!font->vmtx)
86 return;
87 qsort(font->vmtx, font->vmtx_len, sizeof(pdf_vmtx), cmpv);
88 font->size += font->vmtx_cap * sizeof(pdf_vmtx);
89 }
90
91 pdf_hmtx
pdf_lookup_hmtx(fz_context * ctx,pdf_font_desc * font,int cid)92 pdf_lookup_hmtx(fz_context *ctx, pdf_font_desc *font, int cid)
93 {
94 int l = 0;
95 int r = font->hmtx_len - 1;
96 int m;
97
98 if (!font->hmtx)
99 goto notfound;
100
101 while (l <= r)
102 {
103 m = (l + r) >> 1;
104 if (cid < font->hmtx[m].lo)
105 r = m - 1;
106 else if (cid > font->hmtx[m].hi)
107 l = m + 1;
108 else
109 return font->hmtx[m];
110 }
111
112 notfound:
113 return font->dhmtx;
114 }
115
116 pdf_vmtx
pdf_lookup_vmtx(fz_context * ctx,pdf_font_desc * font,int cid)117 pdf_lookup_vmtx(fz_context *ctx, pdf_font_desc *font, int cid)
118 {
119 pdf_hmtx h;
120 pdf_vmtx v;
121 int l = 0;
122 int r = font->vmtx_len - 1;
123 int m;
124
125 if (!font->vmtx)
126 goto notfound;
127
128 while (l <= r)
129 {
130 m = (l + r) >> 1;
131 if (cid < font->vmtx[m].lo)
132 r = m - 1;
133 else if (cid > font->vmtx[m].hi)
134 l = m + 1;
135 else
136 return font->vmtx[m];
137 }
138
139 notfound:
140 h = pdf_lookup_hmtx(ctx, font, cid);
141 v = font->dvmtx;
142 v.x = h.w / 2;
143 return v;
144 }
145