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#include "fitz.h"
#include "mupdf.h"
fz_error
pdf_loadxobject(pdf_xobject **formp, pdf_xref *xref, fz_obj *dict)
{
fz_error error;
pdf_xobject *form;
fz_obj *obj;
if ((*formp = pdf_finditem(xref->store, pdf_dropxobject, dict)))
{
pdf_keepxobject(*formp);
return fz_okay;
}
form = fz_malloc(sizeof(pdf_xobject));
form->refs = 1;
form->resources = nil;
form->contents = nil;
form->colorspace = nil;
pdf_logrsrc("load xobject (%d %d R) ptr=%p {\n", fz_tonum(dict), fz_togen(dict), form);
/* Store item immediately, to avoid possible recursion if objects refer back to this one */
pdf_storeitem(xref->store, pdf_keepxobject, pdf_dropxobject, dict, form);
obj = fz_dictgets(dict, "BBox");
form->bbox = pdf_torect(obj);
pdf_logrsrc("bbox [%g %g %g %g]\n",
form->bbox.x0, form->bbox.y0,
form->bbox.x1, form->bbox.y1);
obj = fz_dictgets(dict, "Matrix");
if (obj)
form->matrix = pdf_tomatrix(obj);
else
form->matrix = fz_identity;
pdf_logrsrc("matrix [%g %g %g %g %g %g]\n",
form->matrix.a, form->matrix.b,
form->matrix.c, form->matrix.d,
form->matrix.e, form->matrix.f);
form->isolated = 0;
form->knockout = 0;
form->transparency = 0;
obj = fz_dictgets(dict, "Group");
if (obj)
{
fz_obj *attrs = obj;
form->isolated = fz_tobool(fz_dictgets(attrs, "I"));
form->knockout = fz_tobool(fz_dictgets(attrs, "K"));
obj = fz_dictgets(attrs, "S");
if (fz_isname(obj) && !strcmp(fz_toname(obj), "Transparency"))
form->transparency = 1;
obj = fz_dictgets(attrs, "CS");
if (obj)
{
error = pdf_loadcolorspace(&form->colorspace, xref, obj);
if (error)
fz_catch(error, "cannot load xobject colorspace");
pdf_logrsrc("colorspace %s\n", form->colorspace->name);
}
}
pdf_logrsrc("isolated %d\n", form->isolated);
pdf_logrsrc("knockout %d\n", form->knockout);
pdf_logrsrc("transparency %d\n", form->transparency);
form->resources = fz_dictgets(dict, "Resources");
if (form->resources)
fz_keepobj(form->resources);
error = pdf_loadstream(&form->contents, xref, fz_tonum(dict), fz_togen(dict));
if (error)
{
pdf_removeitem(xref->store, pdf_dropxobject, dict);
pdf_dropxobject(form);
return fz_rethrow(error, "cannot load xobject content stream (%d %d R)", fz_tonum(dict), fz_togen(dict));
}
pdf_logrsrc("stream %d bytes\n", form->contents->len);
pdf_logrsrc("}\n");
*formp = form;
return fz_okay;
}
pdf_xobject *
pdf_keepxobject(pdf_xobject *xobj)
{
xobj->refs ++;
return xobj;
}
void
pdf_dropxobject(pdf_xobject *xobj)
{
if (xobj && --xobj->refs == 0)
{
if (xobj->colorspace)
fz_dropcolorspace(xobj->colorspace);
if (xobj->resources)
fz_dropobj(xobj->resources);
if (xobj->contents)
fz_dropbuffer(xobj->contents);
fz_free(xobj);
}
}
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