[Gambas-user] print resolution issues

[Paul Horechuk]

Thanks. I'll check them out.

On 14-10-10 05:04 AM, Gian wrote:
> Hello Paul,
>
> attached two small demonstrations that might inspire you.
> gianluigi
>
>
>
>> Le 08/10/2014 18:20, Paul Horechuk a écrit :
>>> I have a successful project that formats a sheet of labels on an Avery
>>> form and prints directly to an HP OfficeJet 7500 E910.
>>>
>>> I set the printer width to 850 and length to 1100 with a resolution of
>>> 100. These may not be correct for all (PrinterWidth and length are seen
>>> as 216 by 279mm), but by setting moveto coordinates within this 
>>> range, I
>>> do get a correct sheet of labels.
>>>
>>> Problems:
>>>
>>> On a customer printer with the same version of gambas 3.5.4, the
>>> coordinates are stretched so that the labels are stretched by about 
>>> 50%.
>>> This is on a Canon Pixma.
>>>
>>> Further checking shows a print to file (as PDF) from the printer 
>>> dialog,
>>> resulting in:
>>>
>>>     *    vertical resolution is about 1/4 of what it should be
>>>     *    fonts are correctly sized
>>>     *    horizontal positioning is about 1/4 as well
>>>     *    therefore all text is compressed into the upper left
>>>     *    a QR code is about 1/4 the expected size
>>>
>>>
>>> Changing the resolution for a direct print to Pixma has no effect.
>>> Changing from 100 to 75 or to 150, results in the same stretched
>>> printout. This works as expected on the HP.
>>>
>>> Suggestions?
>>>
>> The first thing I can quicky tell you: you must not use the printer
>> resolution when drawing on a printer.
>>
>> If you use it, then something is doomed in your drawing routine, unless
>> you want to draw at the pixel level, for example the thinest possible
>> line (one pixel). Then you need the printer resolution, but this is the
>> only case.
>>
>> Otherwise, in all normal printing routines, printer resolution is not
>> needed.
>>
>> But maybe I didn't understand what you wrote...
>>
>
>
>
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