[cups-devel] how to get supported media information for a particular printer
My Sadhukhan
psadhukhan at gmail.com
Tue Aug 1 22:17:45 PDT 2017
I checked cupsCheckDestSupported() before calling cupsFIndDestSupported()
for options like CUPS_COPIES,CUPS_FINISHINGS,CUPS_MEDIA,CUPS_ORIENTATION,
CUPS_SIDES etc and all of them return false,
although the printer being queried is a MFP and supports duplex,
orientation etc and I can print a test-page out of it.
Is it a bug in cups or am I missing calling/initialising something?
Regards
Prasanta
On Tue, Aug 1, 2017 at 10:56 AM, My Sadhukhan <psadhukhan at gmail.com> wrote:
> Thanks Michael.
> I used cupsGetNamedDest to initialise cups_dest_t but it still fails in
> cupsFindDestSupported().
> ----------
> void getMedia(char *name)
> {
> cups_dest_t *dest = cupsGetNamedDest(CUPS_HTTP_DEFAULT, name, NULL);
> if (dest == NULL) {
> printf("cupsGetNamedDest failed %s\n", cupsLastErrorString());
> return;
> } else {
> printf("dest name %s\n", dest->name);
> }
> cups_dinfo_t *info = cupsCopyDestInfo(CUPS_HTTP_DEFAULT, dest);
> if (info == NULL) {
> printf("CopyDestInfo Request failed %s\n", cupsLastErrorString());
> }
> ipp_attribute_t *media = cupsFindDestSupported(CUPS_HTTP_DEFAULT,
> dest, info, CUPS_MEDIA);
> if (media != NULL) {
> int i, count = ippGetCount(media);
> printf("count %d\n", count);
> for (i = 0; i < count; i++)
> printf(" %s\n", ippGetString(media, i, NULL));
> } else {
> printf("FindDestSupported Request failed %s\n",
> cupsLastErrorString());
> }
> }
>
> ----------------------------citing----------
> dest name Ricoh-Aficio-MP-5002
> CopyDestInfo Request failed successful-ok
> FindDestSupported Request failed Invalid argument
> ----------------
> I am not sure if cupsCopyDestInfo() failed or not . The manual does not
> say the return value if there is error. cupsGetLastErrorString() conveys
> there is no error yet "info" is NULL.
>
> Could you please suggest as to what else is going wrong?
> I could not find "_cups_dinfo_s" structure definition in
> https://www.cups.org/doc/cupspm.html#cups_dinfo_t.
> Also, cupsFindDestSupported() manual shows "Find the default value(s) for
> the given option." which is same as cupsFindDestDefault(). I think the
> former should be texted as "Find supported value(s) for the given option".
>
> Regards
> Prasanta
>
> On Mon, Jul 31, 2017 at 7:11 PM, Michael Sweet <msweet at apple.com> wrote:
>
>> You can't initialize a cups_dest_t structure directly like that and have
>> it work.
>>
>> Use:
>>
>> cups_dest_t *dest = cupsGetNamedDest(CUPS_HTTP_DEFAULT, name, NULL);
>>
>> Then cupsCopyDestInfo will have the information it needs to get the
>> supported media for you...
>>
>>
>> > On Jul 31, 2017, at 6:01 AM, My Sadhukhan <psadhukhan at gmail.com> wrote:
>> >
>> > Hi All,
>> >
>> > I was trying to find the supported media for a particular printer using
>> > non-ppd based API but am encountering a problem.
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> > *void getMedia(char *name){ cups_dest_t dest; dest.name
>> > <http://dest.name> = name; dest.instance = name; dest.is_default
>> =
>> > 0; cups_dinfo_t *info = cupsCopyDestInfo(CUPS_HTTP_DEFAULT, &dest);;
>> > if (info == NULL) { printf("CopyDestInfo Request failed %s\n",
>> > cupsLastErrorString()); } ipp_attribute_t *media =
>> > cupsFindDestSupported(CUPS_HTTP_DEFAULT,
>> > &dest, info, CUPS_MEDIA); if (media != NULL) { int i, count =
>> > ippGetCount(media); printf("count %d\n", count); for (i =
>> 0;
>> > i < count; i++) printf(" %s\n", ippGetString(media, i,
>> > NULL)); } else { printf("FindDestSupported Request failed
>> %s\n",
>> > cupsLastErrorString()); }}int main(void){
>> > getMedia("Ricoh-Aficio-MP-5002");*
>> > *}*
>> >
>> > I am getting
>> > -----------
>> > CopyDestInfo Request failed (null)
>> > FindDestSupported Request failed Invalid argument
>> > -----------
>> >
>> > Earlier, I was using
>> > char filename = cupsGetPPD("Ricoh-Aficio-MP-5002");
>> > ppd_file_t *ppd = ppdOpenFile(filename);
>> > ppd_option_t *optionPage = ppdFindOption(ppd, "PageSize") and get
>> > optionPage->choices->text
>> > to get the below supported media size information obtained from that
>> > printer ppd.
>> > That is, in* /etc/cups/ppd/Ricoh-Aficio-MP-5002.ppd*,
>> > I have this and I am interested in getting "A3", "A4", "A5", "A6", "B4",
>> > "B5"..."EngQuatro.FullBleed" etc.
>> >
>> > but now, since ppd API is deprecated, I want to use the new IPP-based
>> api.
>> >
>> > Could anyone suggest what I need to use in above code?
>> >
>> > *%========== Information About Media Sizes ==========
>> >
>> > *DefaultImageableArea: A4
>> > *ImageableArea A3/A3: "12 12 830 1179"
>> > *ImageableArea A4/A4: "12 12 583 830"
>> > *ImageableArea A5/A5: "12 12 408 583"
>> > *ImageableArea A6/A6: "12 12 285 408"
>> > *ImageableArea B4/B4 (JIS): "12 12 717 1020"
>> > *ImageableArea B5/B5 (JIS): "12 12 504 717"
>> > *ImageableArea B6/B6 (JIS): "12 12 351 504"
>> > *ImageableArea Legal/Legal: "12 12 600 996"
>> > *ImageableArea GovernmentLG/8.25x14: "12 12 582 996"
>> > *ImageableArea EngQuatro/8x10: "12 12 564 708"
>> > *ImageableArea GLT/8x10.5: "12 12 564 744"
>> > *ImageableArea Letter/Letter: "12 12 600 780"
>> > *ImageableArea Statement/5.5x8.5: "12 12 384 600"
>> > *ImageableArea F/8x13: "12 12 564 924"
>> > *ImageableArea Folio/8.25x13: "12 12 583 923"
>> > *ImageableArea FanFoldGermanLegal/8.5x13: "12 12 600 924"
>> > *ImageableArea Tabloid/11x17: "12 12 780 1212"
>> > *ImageableArea 12x18/12x18: "12 12 852 1284"
>> > *ImageableArea 11x15/11x15: "12 12 780 1068"
>> > *ImageableArea 10x14/10x14: "12 12 708 996"
>> > *ImageableArea 10x15/10x15: "12 12 708 1068"
>> > *ImageableArea 11x14/11x14: "12 12 780 996"
>> > *ImageableArea Executive/Executive: "12 12 510 744"
>> > *ImageableArea Env10/Com10 Env.: "12 12 285 672"
>> > *ImageableArea EnvMonarch/Monarch Env.: "12 12 267 528"
>> > *ImageableArea EnvC5/C5 Env.: "12 12 447 637"
>> > *ImageableArea EnvC6/C6 Env.: "12 12 311 447"
>> > *ImageableArea DLEnv/DL Env.: "12 12 299 611"
>> > *ImageableArea 8Kai/8K: "12 12 745 1094"
>> > *ImageableArea 16Kai/16K: "12 12 541 745"
>> > *ImageableArea A3.FullBleed/A3 (Full Bleed): "0 0 842 1190"
>> > *ImageableArea A4.FullBleed/A4 (Full Bleed): "0 0 595 841"
>> > *ImageableArea A5.FullBleed/A5 (Full Bleed): "0 0 420 594"
>> > *ImageableArea A6.FullBleed/A6 (Full Bleed): "0 0 297 419"
>> > *ImageableArea B4.FullBleed/B4 (JIS) (Full Bleed): "0 0 729 1031"
>> > *ImageableArea B5.FullBleed/B5 (JIS) (Full Bleed): "0 0 516 728"
>> > *ImageableArea B6.FullBleed/B6 (JIS) (Full Bleed): "0 0 363 515"
>> > *ImageableArea Legal.FullBleed/Legal (Full Bleed): "0 0 612 1007"
>> > *ImageableArea GovernmentLG.FullBleed/8.25x14 (Full Bleed): "0 0 594
>> 1007"
>> > *ImageableArea EngQuatro.FullBleed/8x10 (Full Bleed): "0 0 576 719"
>> > ...
>> > ..
>> >
>> > Thanks & Regards
>> > Prasanta
>> > _______________________________________________
>> > cups-devel mailing list
>> > cups-devel at cups.org
>> > https://lists.cups.org/mailman/listinfo/cups-devel
>>
>> _________________________________________________________
>> Michael Sweet, Senior Printing System Engineer
>>
>> _______________________________________________
>> cups-devel mailing list
>> cups-devel at cups.org
>> https://lists.cups.org/mailman/listinfo/cups-devel
>>
>
>
More information about the cups-devel
mailing list