Hello Johannes,
On 09/02/2011 04:28 PM, Johannes Brunen wrote:
> "Carsten Neumann"<carsten_neum...@gmx.net> schrieb im
> Newsbeitrag news:4e5ff506.5030...@gmx.net...
>> hmm, perhaps I'm misreading your message, but to me it sounds as if you
>> are not certain if the proposed change fixes your problem. Have you
>> tried it, does it make a difference?
>>
> I did try it and it works for me,
ok, just wanted to make sure.
> but I'm by no means familiar with the
> details of the jpeg library.
>> hmm, reading a bit more in libjpeg.doc it seems that X_density,
>> Y_density are considered compression parameters that are set to default
>> values by jpeg_set_defaults(), so those two assignments should move
>> after the call, the rest should (must, in case of cinfo.in_color_space)
>> remain before the call.
>> You seem to be set up to actually test this, would you be able to just
>> move the X_density, Y_density assignment down and see if that fixes your
>> problem?
>>
> The only change I did perform was to move the following lines down after
> the jpeg_set_defaults(&cinfo); call.
>
> cinfo.density_unit = 1; // dpi
> cinfo.X_density = UInt16(pImage->getResX()< 0.0f ?
> pImage->getResX() - 0.5f :
> pImage->getResX() + 0.5f);
> cinfo.Y_density = UInt16(pImage->getResY()< 0.0f ?
> pImage->getResY() - 0.5f :
> pImage->getResY() + 0.5f);
>
>
> So, do you mean that the
> cinfo.density_unit = 1; // dpi
> line should not be moved?
no, sorry, I misread your message and thought you had moved the whole
block of assignments including cinfo.in_color_space.
I've applied your suggested fix. Thanks for the report and fix and sorry
again for the confusion.
Cheers,
Carsten
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