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