pdf_xobject *
pdf_load_xobject(pdf_document *xref, pdf_obj *dict)
{
pdf_xobject *form;
pdf_obj *obj;
fz_context *ctx = xref->ctx;
if ((form = pdf_find_item(ctx, pdf_free_xobject_imp, dict)))
{
return form;
}
form = fz_malloc_struct(ctx, pdf_xobject);
FZ_INIT_STORABLE(form, 1, pdf_free_xobject_imp);
form->resources = NULL;
form->contents = NULL;
form->colorspace = NULL;
form->me = NULL;
/* Store item immediately, to avoid possible recursion if objects refer back to this one */
pdf_store_item(ctx, dict, form, pdf_xobject_size(form));
obj = pdf_dict_gets(dict, "BBox");
form->bbox = pdf_to_rect(ctx, obj);
obj = pdf_dict_gets(dict, "Matrix");
if (obj)
form->matrix = pdf_to_matrix(ctx, obj);
else
form->matrix = fz_identity;
form->isolated = 0;
form->knockout = 0;
form->transparency = 0;
obj = pdf_dict_gets(dict, "Group");
if (obj)
{
pdf_obj *attrs = obj;
form->isolated = pdf_to_bool(pdf_dict_gets(attrs, "I"));
form->knockout = pdf_to_bool(pdf_dict_gets(attrs, "K"));
obj = pdf_dict_gets(attrs, "S");
if (pdf_is_name(obj) && !strcmp(pdf_to_name(obj), "Transparency"))
form->transparency = 1;
obj = pdf_dict_gets(attrs, "CS");
if (obj)
{
form->colorspace = pdf_load_colorspace(xref, obj);
if (!form->colorspace)
fz_throw(ctx, "cannot load xobject colorspace");
}
}
form->resources = pdf_dict_gets(dict, "Resources");
if (form->resources)
pdf_keep_obj(form->resources);
fz_try(ctx)
{
form->contents = pdf_load_stream(xref, pdf_to_num(dict), pdf_to_gen(dict));
}
fz_catch(ctx)
{
pdf_remove_item(ctx, pdf_free_xobject_imp, dict);
pdf_drop_xobject(ctx, form);
fz_throw(ctx, "cannot load xobject content stream (%d %d R)", pdf_to_num(dict), pdf_to_gen(dict));
}
form->me = pdf_keep_obj(dict);
return form;
}
pdf_obj *
pdf_new_xobject(pdf_document *doc, const fz_rect *bbox, const fz_matrix *mat)
{
int idict_num;
pdf_obj *idict = NULL;
pdf_obj *dict = NULL;
pdf_xobject *form = NULL;
pdf_obj *obj = NULL;
pdf_obj *res = NULL;
pdf_obj *procset = NULL;
fz_context *ctx = doc->ctx;
fz_var(idict);
fz_var(dict);
fz_var(form);
fz_var(obj);
fz_var(res);
fz_var(procset);
fz_try(ctx)
{
dict = pdf_new_dict(doc, 0);
obj = pdf_new_rect(doc, bbox);
pdf_print_obj(obj);
pdf_dict_puts(dict, "BBox", obj);
pdf_drop_obj(obj);
obj = NULL;
obj = pdf_new_int(doc, 1);
pdf_dict_puts(dict, "FormType", obj);
pdf_drop_obj(obj);
obj = NULL;
obj = pdf_new_int(doc, 0);
pdf_dict_puts(dict, "Length", obj);
pdf_drop_obj(obj);
obj = NULL;
obj = pdf_new_matrix(doc, mat);
pdf_dict_puts(dict, "Matrix", obj);
pdf_drop_obj(obj);
obj = NULL;
res = pdf_new_dict(doc, 0);
procset = pdf_new_array(doc, 2);
obj = pdf_new_name(doc, "PDF");
pdf_array_push(procset, obj);
pdf_drop_obj(obj);
obj = NULL;
obj = pdf_new_name(doc, "Text");
pdf_array_push(procset, obj);
pdf_drop_obj(obj);
obj = NULL;
pdf_dict_puts(res, "ProcSet", procset);
pdf_drop_obj(procset);
procset = NULL;
pdf_dict_puts(dict, "Resources", res);
obj = pdf_new_name(doc, "Form");
pdf_dict_puts(dict, "Subtype", obj);
pdf_drop_obj(obj);
obj = NULL;
obj = pdf_new_name(doc, "XObject");
pdf_dict_puts(dict, "Type", obj);
pdf_drop_obj(obj);
obj = NULL;
form = fz_malloc_struct(ctx, pdf_xobject);
FZ_INIT_STORABLE(form, 1, pdf_free_xobject_imp);
form->resources = NULL;
form->contents = NULL;
form->colorspace = NULL;
form->me = NULL;
form->iteration = 0;
form->bbox = *bbox;
form->matrix = *mat;
form->isolated = 0;
form->knockout = 0;
form->transparency = 0;
form->resources = res;
res = NULL;
idict_num = pdf_create_object(doc);
pdf_update_object(doc, idict_num, dict);
idict = pdf_new_indirect(doc, idict_num, 0);
pdf_drop_obj(dict);
dict = NULL;
pdf_store_item(ctx, idict, form, pdf_xobject_size(form));
form->contents = pdf_keep_obj(idict);
form->me = pdf_keep_obj(idict);
pdf_drop_xobject(ctx, form);
form = NULL;
}
fz_catch(ctx)
{
pdf_drop_obj(procset);
pdf_drop_obj(res);
pdf_drop_obj(obj);
pdf_drop_obj(dict);
pdf_drop_obj(idict);
pdf_drop_xobject(ctx, form);
fz_rethrow_message(ctx, "failed to create xobject)");
}
return idict;
}