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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_pattern(pdf_pattern **patp, 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_pattern *pat; |
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9 | fz_obj *obj; |
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10 | |||
11 | if ((*patp = pdf_find_item(xref->store, pdf_drop_pattern, dict))) |
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12 | { |
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13 | pdf_keep_pattern(*patp); |
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14 | return fz_okay; |
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15 | } |
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16 | |||
17 | pat = fz_malloc(sizeof(pdf_pattern)); |
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18 | pat->refs = 1; |
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19 | pat->resources = NULL; |
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20 | pat->contents = NULL; |
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21 | |||
22 | /* Store pattern now, to avoid possible recursion if objects refer back to this one */ |
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23 | pdf_store_item(xref->store, pdf_keep_pattern, pdf_drop_pattern, dict, pat); |
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24 | |||
25 | pat->ismask = fz_to_int(fz_dict_gets(dict, "PaintType")) == 2; |
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26 | pat->xstep = fz_to_real(fz_dict_gets(dict, "XStep")); |
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27 | pat->ystep = fz_to_real(fz_dict_gets(dict, "YStep")); |
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28 | |||
29 | obj = fz_dict_gets(dict, "BBox"); |
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30 | pat->bbox = pdf_to_rect(obj); |
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31 | |||
32 | obj = fz_dict_gets(dict, "Matrix"); |
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33 | if (obj) |
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34 | pat->matrix = pdf_to_matrix(obj); |
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35 | else |
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36 | pat->matrix = fz_identity; |
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37 | |||
38 | pat->resources = fz_dict_gets(dict, "Resources"); |
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39 | if (pat->resources) |
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40 | fz_keep_obj(pat->resources); |
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41 | |||
42 | error = pdf_load_stream(&pat->contents, xref, fz_to_num(dict), fz_to_gen(dict)); |
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43 | if (error) |
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44 | { |
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45 | pdf_remove_item(xref->store, pdf_drop_pattern, dict); |
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46 | pdf_drop_pattern(pat); |
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47 | return fz_rethrow(error, "cannot load pattern stream (%d %d R)", fz_to_num(dict), fz_to_gen(dict)); |
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48 | } |
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49 | |||
50 | *patp = pat; |
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51 | return fz_okay; |
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52 | } |
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53 | |||
54 | pdf_pattern * |
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55 | pdf_keep_pattern(pdf_pattern *pat) |
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56 | { |
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57 | pat->refs ++; |
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58 | return pat; |
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59 | } |
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60 | |||
61 | void |
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62 | pdf_drop_pattern(pdf_pattern *pat) |
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63 | { |
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64 | if (pat && --pat->refs == 0) |
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65 | { |
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66 | if (pat->resources) |
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67 | fz_drop_obj(pat->resources); |
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68 | if (pat->contents) |
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69 | fz_drop_buffer(pat->contents); |
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70 | fz_free(pat); |
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71 | } |
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72 | } |