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4680 | right-hear | 1 | #include "fitz.h" |
2 | #include "mupdf.h" |
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3 | |||
4 | fz_error |
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5 | pdf_load_xobject(pdf_xobject **formp, pdf_xref *xref, fz_obj *dict) |
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6 | { |
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7 | fz_error error; |
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8 | pdf_xobject *form; |
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9 | fz_obj *obj; |
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10 | |||
11 | if ((*formp = pdf_find_item(xref->store, pdf_drop_xobject, dict))) |
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12 | { |
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13 | pdf_keep_xobject(*formp); |
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14 | return fz_okay; |
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15 | } |
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16 | |||
17 | form = fz_malloc(sizeof(pdf_xobject)); |
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18 | form->refs = 1; |
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19 | form->resources = NULL; |
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20 | form->contents = NULL; |
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21 | form->colorspace = NULL; |
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22 | |||
23 | /* Store item immediately, to avoid possible recursion if objects refer back to this one */ |
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24 | pdf_store_item(xref->store, pdf_keep_xobject, pdf_drop_xobject, dict, form); |
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25 | |||
26 | obj = fz_dict_gets(dict, "BBox"); |
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27 | form->bbox = pdf_to_rect(obj); |
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28 | |||
29 | obj = fz_dict_gets(dict, "Matrix"); |
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30 | if (obj) |
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31 | form->matrix = pdf_to_matrix(obj); |
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32 | else |
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33 | form->matrix = fz_identity; |
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34 | |||
35 | form->isolated = 0; |
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36 | form->knockout = 0; |
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37 | form->transparency = 0; |
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38 | |||
39 | obj = fz_dict_gets(dict, "Group"); |
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40 | if (obj) |
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41 | { |
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42 | fz_obj *attrs = obj; |
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43 | |||
44 | form->isolated = fz_to_bool(fz_dict_gets(attrs, "I")); |
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45 | form->knockout = fz_to_bool(fz_dict_gets(attrs, "K")); |
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46 | |||
47 | obj = fz_dict_gets(attrs, "S"); |
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48 | if (fz_is_name(obj) && !strcmp(fz_to_name(obj), "Transparency")) |
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49 | form->transparency = 1; |
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50 | |||
51 | obj = fz_dict_gets(attrs, "CS"); |
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52 | if (obj) |
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53 | { |
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54 | error = pdf_load_colorspace(&form->colorspace, xref, obj); |
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55 | if (error) |
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56 | fz_catch(error, "cannot load xobject colorspace"); |
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57 | } |
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58 | } |
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59 | |||
60 | form->resources = fz_dict_gets(dict, "Resources"); |
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61 | if (form->resources) |
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62 | fz_keep_obj(form->resources); |
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63 | |||
64 | error = pdf_load_stream(&form->contents, xref, fz_to_num(dict), fz_to_gen(dict)); |
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65 | if (error) |
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66 | { |
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67 | pdf_remove_item(xref->store, pdf_drop_xobject, dict); |
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68 | pdf_drop_xobject(form); |
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69 | return fz_rethrow(error, "cannot load xobject content stream (%d %d R)", fz_to_num(dict), fz_to_gen(dict)); |
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70 | } |
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71 | |||
72 | *formp = form; |
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73 | return fz_okay; |
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74 | } |
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75 | |||
76 | pdf_xobject * |
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77 | pdf_keep_xobject(pdf_xobject *xobj) |
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78 | { |
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79 | xobj->refs ++; |
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80 | return xobj; |
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81 | } |
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82 | |||
83 | void |
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84 | pdf_drop_xobject(pdf_xobject *xobj) |
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85 | { |
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86 | if (xobj && --xobj->refs == 0) |
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87 | { |
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88 | if (xobj->colorspace) |
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89 | fz_drop_colorspace(xobj->colorspace); |
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90 | if (xobj->resources) |
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91 | fz_drop_obj(xobj->resources); |
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92 | if (xobj->contents) |
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93 | fz_drop_buffer(xobj->contents); |
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94 | fz_free(xobj); |
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95 | } |
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96 | } |