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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 | /* |
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| 5 | * Load CMap stream in PDF file |
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| 6 | */ |
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| 7 | fz_error |
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| 8 | pdf_load_embedded_cmap(pdf_cmap **cmapp, pdf_xref *xref, fz_obj *stmobj) |
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| 9 | { |
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| 10 | fz_error error = fz_okay; |
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| 11 | fz_stream *file = NULL; |
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| 12 | pdf_cmap *cmap = NULL; |
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| 13 | pdf_cmap *usecmap; |
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| 14 | fz_obj *wmode; |
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| 15 | fz_obj *obj; |
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| 16 | |||
| 17 | if ((*cmapp = pdf_find_item(xref->store, pdf_drop_cmap, stmobj))) |
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| 18 | { |
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| 19 | pdf_keep_cmap(*cmapp); |
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| 20 | return fz_okay; |
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| 21 | } |
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| 22 | |||
| 23 | error = pdf_open_stream(&file, xref, fz_to_num(stmobj), fz_to_gen(stmobj)); |
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| 24 | if (error) |
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| 25 | { |
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| 26 | error = fz_rethrow(error, "cannot open cmap stream (%d %d R)", fz_to_num(stmobj), fz_to_gen(stmobj)); |
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| 27 | goto cleanup; |
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| 28 | } |
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| 29 | |||
| 30 | error = pdf_parse_cmap(&cmap, file); |
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| 31 | if (error) |
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| 32 | { |
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| 33 | error = fz_rethrow(error, "cannot parse cmap stream (%d %d R)", fz_to_num(stmobj), fz_to_gen(stmobj)); |
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| 34 | goto cleanup; |
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| 35 | } |
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| 36 | |||
| 37 | fz_close(file); |
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| 38 | |||
| 39 | wmode = fz_dict_gets(stmobj, "WMode"); |
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| 40 | if (fz_is_int(wmode)) |
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| 41 | pdf_set_wmode(cmap, fz_to_int(wmode)); |
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| 42 | |||
| 43 | obj = fz_dict_gets(stmobj, "UseCMap"); |
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| 44 | if (fz_is_name(obj)) |
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| 45 | { |
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| 46 | error = pdf_load_system_cmap(&usecmap, fz_to_name(obj)); |
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| 47 | if (error) |
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| 48 | { |
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| 49 | error = fz_rethrow(error, "cannot load system usecmap '%s'", fz_to_name(obj)); |
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| 50 | goto cleanup; |
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| 51 | } |
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| 52 | pdf_set_usecmap(cmap, usecmap); |
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| 53 | pdf_drop_cmap(usecmap); |
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| 54 | } |
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| 55 | else if (fz_is_indirect(obj)) |
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| 56 | { |
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| 57 | error = pdf_load_embedded_cmap(&usecmap, xref, obj); |
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| 58 | if (error) |
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| 59 | { |
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| 60 | error = fz_rethrow(error, "cannot load embedded usecmap (%d %d R)", fz_to_num(obj), fz_to_gen(obj)); |
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| 61 | goto cleanup; |
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| 62 | } |
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| 63 | pdf_set_usecmap(cmap, usecmap); |
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| 64 | pdf_drop_cmap(usecmap); |
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| 65 | } |
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| 66 | |||
| 67 | pdf_store_item(xref->store, pdf_keep_cmap, pdf_drop_cmap, stmobj, cmap); |
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| 68 | |||
| 69 | *cmapp = cmap; |
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| 70 | return fz_okay; |
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| 71 | |||
| 72 | cleanup: |
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| 73 | if (file) |
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| 74 | fz_close(file); |
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| 75 | if (cmap) |
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| 76 | pdf_drop_cmap(cmap); |
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| 77 | return error; /* already rethrown */ |
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| 78 | } |
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| 79 | |||
| 80 | /* |
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| 81 | * Create an Identity-* CMap (for both 1 and 2-byte encodings) |
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| 82 | */ |
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| 83 | pdf_cmap * |
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| 84 | pdf_new_identity_cmap(int wmode, int bytes) |
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| 85 | { |
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| 86 | pdf_cmap *cmap = pdf_new_cmap(); |
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| 87 | sprintf(cmap->cmap_name, "Identity-%c", wmode ? 'V' : 'H'); |
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| 88 | pdf_add_codespace(cmap, 0x0000, 0xffff, bytes); |
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| 89 | pdf_map_range_to_range(cmap, 0x0000, 0xffff, 0); |
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| 90 | pdf_sort_cmap(cmap); |
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| 91 | pdf_set_wmode(cmap, wmode); |
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| 92 | return cmap; |
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| 93 | } |
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| 94 | |||
| 95 | /* |
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| 96 | * Load predefined CMap from system. |
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| 97 | */ |
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| 98 | fz_error |
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| 99 | pdf_load_system_cmap(pdf_cmap **cmapp, char *cmap_name) |
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| 100 | { |
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| 101 | pdf_cmap *usecmap; |
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| 102 | pdf_cmap *cmap; |
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| 103 | |||
| 104 | cmap = pdf_find_builtin_cmap(cmap_name); |
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| 105 | if (!cmap) |
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| 106 | return fz_throw("no builtin cmap file: %s", cmap_name); |
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| 107 | |||
| 108 | if (cmap->usecmap_name[0] && !cmap->usecmap) |
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| 109 | { |
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| 110 | usecmap = pdf_find_builtin_cmap(cmap->usecmap_name); |
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| 111 | if (!usecmap) |
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| 112 | return fz_throw("nu builtin cmap file: %s", cmap->usecmap_name); |
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| 113 | pdf_set_usecmap(cmap, usecmap); |
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| 114 | } |
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| 115 | |||
| 116 | *cmapp = cmap; |
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| 117 | return fz_okay; |
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| 118 | } |