objective c - Zebra IMZ 320 printing image takes too long (iOS) -


i using zebra imz 320 print pdf document ios (receipt actually) , works. takes 50 seconds print 23 kb pdf document.

i thinking maybe if send in hexadecimal format printer understand, printing time decrease can't find how send in byte format. tried zpl codes understanding converting image .grf format , send printer using utilities images dynamic.

can please me ?

here code send print images :

cgdataproviderref dataprovider = cgdataprovidercreatewithcfdata((cfdataref)pdfdata); cgpdfdocumentref document = cgpdfdocumentcreatewithprovider(dataprovider);      size_t npages = cgpdfdocumentgetnumberofpages(document);     size_t pagenum;     (pagenum = 1; pagenum <= npages; pagenum++) {          uiimage* image = nil;          cgpdfpageref page = cgpdfdocumentgetpage(document, pagenum);          cgrect rect = cgpdfpagegetboxrect(page, kcgpdfartbox);          uigraphicsbeginimagecontextwithoptions(rect.size, yes, 2.6);          cgcontextref context = uigraphicsgetcurrentcontext();          cgcolorspaceref rgb = cgcolorspacecreatedevicergb();         const cgfloat fillcolors[] = {1.0, 1.0, 1.0, 1.0};          cgcolorref colorref = cgcolorcreate(rgb, fillcolors);         cgcontextsetfillcolorwithcolor(context, colorref);         cgcontextfillrect(context, rect);         cgcolorspacerelease(rgb);         cgcolorrelease(colorref);          cgcontexttranslatectm(context, 0.0, rect.size.height);          cgcontextscalectm(context, 1.0, -1.0);          if (page != null)         {             cgcontextsavegstate(context);              cgaffinetransform pdftransform = cgpdfpagegetdrawingtransform(page, kcgpdfcropbox, rect, 0, true);              cgcontextconcatctm(context, pdftransform);              cgcontextdrawpdfpage(context, page);              cgcontextrestoregstate(context);              image = uigraphicsgetimagefromcurrentimagecontext();         }          uigraphicsendimagecontext();          if (nil != image) {             nserror *error = nil;             success = [graphicsutil printimage:[image cgimage] atx:0 aty:0 withwidth:x withheight:y                              andisinsideformat:no error:&error];         }     }

thanks lot

note : yes on bluetooth

one way reduce time send text of receipt printer (formatted in printer language) instead of sending pdf image; approach drastically reduce number of bytes have sent on bluetooth, typically under 1k.


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