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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 4680 | right-hear | 1 | #include "fitz.h" |
| 2 | #include "mupdf.h" |
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| 3 | |||
| 4 | static fz_error |
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| 5 | pdf_run_glyph_func(void *xref, fz_obj *rdb, fz_buffer *contents, fz_device *dev, fz_matrix ctm) |
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| 6 | { |
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| 7 | return pdf_run_glyph(xref, rdb, contents, dev, ctm); |
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| 8 | } |
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| 9 | |||
| 10 | fz_error |
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| 11 | pdf_load_type3_font(pdf_font_desc **fontdescp, pdf_xref *xref, fz_obj *rdb, fz_obj *dict) |
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| 12 | { |
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| 13 | fz_error error; |
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| 14 | char buf[256]; |
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| 15 | char *estrings[256]; |
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| 16 | pdf_font_desc *fontdesc; |
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| 17 | fz_obj *encoding; |
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| 18 | fz_obj *widths; |
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| 19 | fz_obj *charprocs; |
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| 20 | fz_obj *obj; |
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| 21 | int first, last; |
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| 22 | int i, k, n; |
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| 23 | fz_rect bbox; |
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| 24 | fz_matrix matrix; |
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| 25 | |||
| 26 | obj = fz_dict_gets(dict, "Name"); |
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| 27 | if (fz_is_name(obj)) |
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| 28 | fz_strlcpy(buf, fz_to_name(obj), sizeof buf); |
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| 29 | else |
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| 30 | sprintf(buf, "Unnamed-T3"); |
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| 31 | |||
| 32 | fontdesc = pdf_new_font_desc(); |
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| 33 | |||
| 34 | obj = fz_dict_gets(dict, "FontMatrix"); |
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| 35 | matrix = pdf_to_matrix(obj); |
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| 36 | |||
| 37 | obj = fz_dict_gets(dict, "FontBBox"); |
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| 38 | bbox = pdf_to_rect(obj); |
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| 39 | |||
| 40 | fontdesc->font = fz_new_type3_font(buf, matrix); |
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| 41 | |||
| 42 | fz_set_font_bbox(fontdesc->font, bbox.x0, bbox.y0, bbox.x1, bbox.y1); |
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| 43 | |||
| 44 | /* Encoding */ |
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| 45 | |||
| 46 | for (i = 0; i < 256; i++) |
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| 47 | estrings[i] = NULL; |
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| 48 | |||
| 49 | encoding = fz_dict_gets(dict, "Encoding"); |
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| 50 | if (!encoding) |
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| 51 | { |
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| 52 | error = fz_throw("syntaxerror: Type3 font missing Encoding"); |
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| 53 | goto cleanup; |
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| 54 | } |
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| 55 | |||
| 56 | if (fz_is_name(encoding)) |
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| 57 | pdf_load_encoding(estrings, fz_to_name(encoding)); |
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| 58 | |||
| 59 | if (fz_is_dict(encoding)) |
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| 60 | { |
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| 61 | fz_obj *base, *diff, *item; |
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| 62 | |||
| 63 | base = fz_dict_gets(encoding, "BaseEncoding"); |
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| 64 | if (fz_is_name(base)) |
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| 65 | pdf_load_encoding(estrings, fz_to_name(base)); |
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| 66 | |||
| 67 | diff = fz_dict_gets(encoding, "Differences"); |
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| 68 | if (fz_is_array(diff)) |
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| 69 | { |
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| 70 | n = fz_array_len(diff); |
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| 71 | k = 0; |
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| 72 | for (i = 0; i < n; i++) |
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| 73 | { |
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| 74 | item = fz_array_get(diff, i); |
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| 75 | if (fz_is_int(item)) |
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| 76 | k = fz_to_int(item); |
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| 77 | if (fz_is_name(item)) |
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| 78 | estrings[k++] = fz_to_name(item); |
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| 79 | if (k < 0) k = 0; |
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| 80 | if (k > 255) k = 255; |
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| 81 | } |
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| 82 | } |
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| 83 | } |
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| 84 | |||
| 85 | fontdesc->encoding = pdf_new_identity_cmap(0, 1); |
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| 86 | |||
| 87 | error = pdf_load_to_unicode(fontdesc, xref, estrings, NULL, fz_dict_gets(dict, "ToUnicode")); |
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| 88 | if (error) |
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| 89 | goto cleanup; |
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| 90 | |||
| 91 | /* Widths */ |
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| 92 | |||
| 93 | pdf_set_default_hmtx(fontdesc, 0); |
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| 94 | |||
| 95 | first = fz_to_int(fz_dict_gets(dict, "FirstChar")); |
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| 96 | last = fz_to_int(fz_dict_gets(dict, "LastChar")); |
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| 97 | |||
| 98 | widths = fz_dict_gets(dict, "Widths"); |
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| 99 | if (!widths) |
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| 100 | { |
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| 101 | error = fz_throw("syntaxerror: Type3 font missing Widths"); |
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| 102 | goto cleanup; |
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| 103 | } |
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| 104 | |||
| 105 | for (i = first; i <= last; i++) |
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| 106 | { |
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| 107 | float w = fz_to_real(fz_array_get(widths, i - first)); |
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| 108 | w = fontdesc->font->t3matrix.a * w * 1000; |
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| 109 | fontdesc->font->t3widths[i] = w * 0.001f; |
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| 110 | pdf_add_hmtx(fontdesc, i, i, w); |
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| 111 | } |
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| 112 | |||
| 113 | pdf_end_hmtx(fontdesc); |
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| 114 | |||
| 115 | /* Resources -- inherit page resources if the font doesn't have its own */ |
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| 116 | |||
| 117 | fontdesc->font->t3resources = fz_dict_gets(dict, "Resources"); |
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| 118 | if (!fontdesc->font->t3resources) |
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| 119 | fontdesc->font->t3resources = rdb; |
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| 120 | if (fontdesc->font->t3resources) |
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| 121 | fz_keep_obj(fontdesc->font->t3resources); |
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| 122 | if (!fontdesc->font->t3resources) |
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| 123 | fz_warn("no resource dictionary for type 3 font!"); |
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| 124 | |||
| 125 | fontdesc->font->t3xref = xref; |
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| 126 | fontdesc->font->t3run = pdf_run_glyph_func; |
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| 127 | |||
| 128 | /* CharProcs */ |
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| 129 | |||
| 130 | charprocs = fz_dict_gets(dict, "CharProcs"); |
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| 131 | if (!charprocs) |
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| 132 | { |
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| 133 | error = fz_throw("syntaxerror: Type3 font missing CharProcs"); |
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| 134 | goto cleanup; |
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| 135 | } |
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| 136 | |||
| 137 | for (i = 0; i < 256; i++) |
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| 138 | { |
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| 139 | if (estrings[i]) |
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| 140 | { |
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| 141 | obj = fz_dict_gets(charprocs, estrings[i]); |
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| 142 | if (pdf_is_stream(xref, fz_to_num(obj), fz_to_gen(obj))) |
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| 143 | { |
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| 144 | error = pdf_load_stream(&fontdesc->font->t3procs[i], xref, fz_to_num(obj), fz_to_gen(obj)); |
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| 145 | if (error) |
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| 146 | goto cleanup; |
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| 147 | } |
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| 148 | } |
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| 149 | } |
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| 150 | |||
| 151 | *fontdescp = fontdesc; |
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| 152 | return fz_okay; |
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| 153 | |||
| 154 | cleanup: |
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| 155 | fz_drop_font(fontdesc->font); |
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| 156 | fz_free(fontdesc); |
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| 157 | return fz_rethrow(error, "cannot load type3 font (%d %d R)", fz_to_num(dict), fz_to_gen(dict)); |
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| 158 | } |