97 lines
2.1 KiB
C
97 lines
2.1 KiB
C
#include "fitz.h"
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#include "mupdf.h"
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fz_error
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pdf_load_xobject(pdf_xobject **formp, pdf_xref *xref, fz_obj *dict)
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{
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fz_error error;
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pdf_xobject *form;
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fz_obj *obj;
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if ((*formp = pdf_find_item(xref->store, pdf_drop_xobject, dict)))
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{
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pdf_keep_xobject(*formp);
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return fz_okay;
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}
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form = fz_malloc(sizeof(pdf_xobject));
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form->refs = 1;
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form->resources = NULL;
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form->contents = NULL;
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form->colorspace = NULL;
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/* Store item immediately, to avoid possible recursion if objects refer back to this one */
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pdf_store_item(xref->store, pdf_keep_xobject, pdf_drop_xobject, dict, form);
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obj = fz_dict_gets(dict, "BBox");
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form->bbox = pdf_to_rect(obj);
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obj = fz_dict_gets(dict, "Matrix");
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if (obj)
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form->matrix = pdf_to_matrix(obj);
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else
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form->matrix = fz_identity;
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form->isolated = 0;
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form->knockout = 0;
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form->transparency = 0;
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obj = fz_dict_gets(dict, "Group");
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if (obj)
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{
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fz_obj *attrs = obj;
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form->isolated = fz_to_bool(fz_dict_gets(attrs, "I"));
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form->knockout = fz_to_bool(fz_dict_gets(attrs, "K"));
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obj = fz_dict_gets(attrs, "S");
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if (fz_is_name(obj) && !strcmp(fz_to_name(obj), "Transparency"))
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form->transparency = 1;
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obj = fz_dict_gets(attrs, "CS");
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if (obj)
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{
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error = pdf_load_colorspace(&form->colorspace, xref, obj);
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if (error)
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fz_catch(error, "cannot load xobject colorspace");
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}
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}
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form->resources = fz_dict_gets(dict, "Resources");
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if (form->resources)
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fz_keep_obj(form->resources);
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error = pdf_load_stream(&form->contents, xref, fz_to_num(dict), fz_to_gen(dict));
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if (error)
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{
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pdf_remove_item(xref->store, pdf_drop_xobject, dict);
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pdf_drop_xobject(form);
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return fz_rethrow(error, "cannot load xobject content stream (%d %d R)", fz_to_num(dict), fz_to_gen(dict));
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}
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*formp = form;
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return fz_okay;
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}
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pdf_xobject *
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pdf_keep_xobject(pdf_xobject *xobj)
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{
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xobj->refs ++;
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return xobj;
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}
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void
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pdf_drop_xobject(pdf_xobject *xobj)
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{
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if (xobj && --xobj->refs == 0)
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{
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if (xobj->colorspace)
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fz_drop_colorspace(xobj->colorspace);
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if (xobj->resources)
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fz_drop_obj(xobj->resources);
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if (xobj->contents)
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fz_drop_buffer(xobj->contents);
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fz_free(xobj);
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}
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}
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