1 #include "mupdf/fitz.h"
2 #include "mupdf/pdf.h"
3
4 pdf_obj *
pdf_xobject_resources(fz_context * ctx,pdf_obj * xobj)5 pdf_xobject_resources(fz_context *ctx, pdf_obj *xobj)
6 {
7 return pdf_dict_get(ctx, xobj, PDF_NAME(Resources));
8 }
9
10 fz_rect
pdf_xobject_bbox(fz_context * ctx,pdf_obj * xobj)11 pdf_xobject_bbox(fz_context *ctx, pdf_obj *xobj)
12 {
13 return pdf_dict_get_rect(ctx, xobj, PDF_NAME(BBox));
14 }
15
16 fz_matrix
pdf_xobject_matrix(fz_context * ctx,pdf_obj * xobj)17 pdf_xobject_matrix(fz_context *ctx, pdf_obj *xobj)
18 {
19 return pdf_dict_get_matrix(ctx, xobj, PDF_NAME(Matrix));
20 }
21
pdf_xobject_isolated(fz_context * ctx,pdf_obj * xobj)22 int pdf_xobject_isolated(fz_context *ctx, pdf_obj *xobj)
23 {
24 pdf_obj *group = pdf_dict_get(ctx, xobj, PDF_NAME(Group));
25 if (group)
26 return pdf_dict_get_bool(ctx, group, PDF_NAME(I));
27 return 0;
28 }
29
pdf_xobject_knockout(fz_context * ctx,pdf_obj * xobj)30 int pdf_xobject_knockout(fz_context *ctx, pdf_obj *xobj)
31 {
32 pdf_obj *group = pdf_dict_get(ctx, xobj, PDF_NAME(Group));
33 if (group)
34 return pdf_dict_get_bool(ctx, group, PDF_NAME(K));
35 return 0;
36 }
37
pdf_xobject_transparency(fz_context * ctx,pdf_obj * xobj)38 int pdf_xobject_transparency(fz_context *ctx, pdf_obj *xobj)
39 {
40 pdf_obj *group = pdf_dict_get(ctx, xobj, PDF_NAME(Group));
41 if (group)
42 if (pdf_name_eq(ctx, pdf_dict_get(ctx, group, PDF_NAME(S)), PDF_NAME(Transparency)))
43 return 1;
44 return 0;
45 }
46
47 fz_colorspace *
pdf_xobject_colorspace(fz_context * ctx,pdf_obj * xobj)48 pdf_xobject_colorspace(fz_context *ctx, pdf_obj *xobj)
49 {
50 pdf_obj *group = pdf_dict_get(ctx, xobj, PDF_NAME(Group));
51 if (group)
52 {
53 pdf_obj *cs = pdf_dict_get(ctx, group, PDF_NAME(CS));
54 if (cs)
55 {
56 fz_colorspace *colorspace = NULL;
57 fz_try(ctx)
58 colorspace = pdf_load_colorspace(ctx, cs);
59 fz_catch(ctx)
60 {
61 fz_rethrow_if(ctx, FZ_ERROR_TRYLATER);
62 fz_warn(ctx, "Ignoring XObject blending colorspace.");
63 }
64 if (!fz_is_valid_blend_colorspace(ctx, colorspace))
65 {
66 fz_warn(ctx, "Ignoring invalid XObject blending colorspace: %s.", colorspace->name);
67 fz_drop_colorspace(ctx, colorspace);
68 return NULL;
69 }
70 return colorspace;
71 }
72 }
73 return NULL;
74 }
75
76 pdf_obj *
pdf_new_xobject(fz_context * ctx,pdf_document * doc,fz_rect bbox,fz_matrix matrix,pdf_obj * res,fz_buffer * contents)77 pdf_new_xobject(fz_context *ctx, pdf_document *doc, fz_rect bbox, fz_matrix matrix, pdf_obj *res, fz_buffer *contents)
78 {
79 pdf_obj *ind = NULL;
80 pdf_obj *form = pdf_new_dict(ctx, doc, 5);
81 fz_try(ctx)
82 {
83 pdf_dict_put(ctx, form, PDF_NAME(Type), PDF_NAME(XObject));
84 pdf_dict_put(ctx, form, PDF_NAME(Subtype), PDF_NAME(Form));
85 pdf_dict_put_rect(ctx, form, PDF_NAME(BBox), bbox);
86 pdf_dict_put_matrix(ctx, form, PDF_NAME(Matrix), matrix);
87 if (res)
88 pdf_dict_put(ctx, form, PDF_NAME(Resources), res);
89 ind = pdf_add_stream(ctx, doc, contents, form, 0);
90 }
91 fz_always(ctx)
92 pdf_drop_obj(ctx, form);
93 fz_catch(ctx)
94 fz_rethrow(ctx);
95 return ind;
96 }
97
98 void
pdf_update_xobject(fz_context * ctx,pdf_document * doc,pdf_obj * form,fz_rect bbox,fz_matrix matrix,pdf_obj * res,fz_buffer * contents)99 pdf_update_xobject(fz_context *ctx, pdf_document *doc, pdf_obj *form, fz_rect bbox, fz_matrix matrix, pdf_obj *res, fz_buffer *contents)
100 {
101 pdf_dict_put_rect(ctx, form, PDF_NAME(BBox), bbox);
102 pdf_dict_put_matrix(ctx, form, PDF_NAME(Matrix), matrix);
103 if (res)
104 pdf_dict_put(ctx, form, PDF_NAME(Resources), res);
105 else
106 pdf_dict_del(ctx, form, PDF_NAME(Resources));
107 pdf_update_stream(ctx, doc, form, contents, 0);
108 }
109