[cups-devel] how to get supported media information for a particular printer
My Sadhukhan
psadhukhan at gmail.com
Tue Oct 3 03:03:28 PDT 2017
As told, it seems we need to use media-specific APIs like cupsGetDestMediaCount
to find out how many media-size the printer supports.
I tried in that route following the example described in
https://www.cups.org/doc/cupspm.html#cupsGetDestMediaCount, but still
finding a problem in ubuntu16.04.
It returns supported media count as 0 and when I tried to see if there is
any error, it says "Invalid argument" for cupsGetDestMediaCount. Any idea
why?
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());
}
int count = cupsGetDestMediaCount(CUPS_HTTP_DEFAULT, dest, info,
CUPS_MEDIA_FLAGS_READY);
printf("media count %d %s\n", count, cupsLastErrorString());
cups_size_t size;
for (int i = 0; i < count; i++) {
if (cupsGetDestMediaByIndex(CUPS_HTTP_DEFAULT, dest, info,
i, CUPS_MEDIA_FLAGS_READY,
&size))
{
printf("%s:\n", size.media);
printf(" Width: %.2fin\n", size.width / 2540.0);
printf(" Length: %.2fin\n", size.length / 2540.0);
printf(" Bottom: %.2fin\n", size.bottom / 2540.0);
printf(" Left: %.2fin\n", size.left / 2540.0);
printf(" Right: %.2fin\n", size.right / 2540.0);
printf(" Top: %.2fin\n", size.top / 2540.0);
}
}
}
int main(void)
{
getMedia("Ricoh-Aficio-MP-5002");
}
Regards
Prasanta
On Sun, Aug 20, 2017 at 11:45 PM, Philip Race <philip.race at oracle.com>
wrote:
> It seems that the problem with cupsCheckDestSupported was a long standing
> bug
> that was fixed just 2 months ago .. not supporting a NULL value !
> https://github.com/apple/cups/commit/49b6c6af7674e4d37d5cb14
> 385c19618d9c1b668
> ..
>
> What would be the recommended way to workaround that in shipping versions
> of 2.X
> found on current OSes like Ubuntu 16.10 ?
>
>
> -phil
>
> [1] https://www.cups.org/doc/cupspm.html#cupsCheckDestSupported
>
>
> On 8/2/17, 11:18 PM, My Sadhukhan wrote:
>
>> I also tried with cups 2.2.0 with ubuntu16.10 and there also the
>> cupsCheckDestSupported returns false for all options.
>>
>> On Thu, Aug 3, 2017 at 11:41 AM, My Sadhukhan<psadhukhan at gmail.com>
>> wrote:
>>
>> I am using cups 2.1.3 that comes with ubuntu16.04. It should support the
>>> non-ppd APIs, I guess, as that was deprecated from 1.6 onwards.
>>> Please let me know if this version has any problem regarding the APIs I
>>> am
>>> using.
>>>
>>> Regards
>>> Prasanta
>>>
>>> On Wed, Aug 2, 2017 at 6:45 PM, Michael Sweet<msweet at apple.com> wrote:
>>>
>>> What version of CUPS are you using?
>>>>
>>>> (there have been a number of bug fixes over the years...)
>>>>
>>>> On Aug 2, 2017, at 1:17 AM, My Sadhukhan<psadhukhan at gmail.com> wrote:
>>>>>
>>>>> I checked cupsCheckDestSupported() before calling
>>>>>
>>>> cupsFIndDestSupported()
>>>>
>>>>> for options like CUPS_COPIES,CUPS_FINISHINGS,CU
>>>>>
>>>> PS_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
>>>>>>>
>>>>>>>
>>>>>> _______________________________________________
>>>>> 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
>>>>
>>>>
>>> _______________________________________________
>> cups-devel mailing list
>> cups-devel at cups.org
>> https://lists.cups.org/mailman/listinfo/cups-devel
>>
>
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