[Gvsig_english] Importing a raster image with gvSIG Mobile

[Marcel Schoolmeesters]

Hey all,

I've got new interesting findings :-)

    * The error of the height of the image does_not appear at all_ when
      I zoom *three *times.
    * When I zoom *twice*, the error appears_only in the middle _of the
      image, but not when I see the background of the Map! I cannot say
      exactly,...
    * But when I does not zoom or/*only once...or four times or
      more*/... the image is_not resized _I think...it is the original
      ratio....

I have got some screenshots, so that you might understand it better :)

Perhaps, it is a graphical bug? I don't know...perhaps, somebody's got 
an idea? would be cool to be fixed!


Regards,

Marcel


Am 30.03.2011 16:42, schrieb Marcel Schoolmeesters:
> Thanks for the explanation.
>
> As I said, the ImageExt values are correct...(y is calculated by _y + 
> _h, I think) .....I have debugged the data flow and everything is 
> understandable up to this function (and afterwards. What the function 
> is doing might be clear, and even the values of the viewRect, 
> too,...after your little explanation, what should be self-evident :-)
>
> However, the final lower/left edge of the picture is not shown at 
> 53.475096504° where it should be, but somewhere at 53.464...and I 
> cannot find the code where this is calculated...(but better to say 
> that I have given up because of so many steps...)
>
> Best regards,
>
> Marcel
>
>
> Am 30.03.2011 09:32, schrieb Juan Lucas Dominguez Rubio:
>> Hello,
>> that method computes the extent of the view when you add the first 
>> layer. The app knows the size of the screen and the extent of the 
>> layer, and their ratios are different, so you have to do a simple 
>> computation to find out the extent of the new view.
>> Maybe you have misunderstood the extent of a layer and the extent of 
>> the view?
>> When you add the first layer, the extent of the view is the smallest 
>> rectangle which contains the extent of the layer and, at the same 
>> time, respects the width/height ratio of the screen, of course.
>> Regards,
>> Juan Lucas Domínguez Rubio
>> ---
>> Prodevelop SL, Valencia (España)
>> Tlf.: 96.351.06.12 -- Fax: 96.351.09.68
>> http://www.prodevelop.es <http://www.prodevelop.es/>
>> ---
>>
>> ------------------------------------------------------------------------
>> *De:* gvsig_internacional-bounces at listserv.gva.es en nombre de Marcel 
>> Schoolmeesters
>> *Enviado el:* mar 29/03/2011 21:20
>> *Para:* Users and Developers mailing list
>> *Asunto:* Re: [Gvsig_english] Importing a raster image with gvSIG Mobile
>>
>> well, I think the main problem of understanding is in function 
>> MapContext.*getExtentFromFullExtentAndImageSize*() ... I think the 
>> new height etc are calculated there?
>>
>> Am 29.03.2011 21:00, schrieb Marcel Schoolmeesters:
>>
>>     Hello,
>>
>>     I have tried to load a raster image (had to try jpg, because
>>     *.png did not even load), but I am getting a wrong position of
>>     the extent. Anybody got the same error?
>>
>>     I have tried the debug mode, but there are too many functions to
>>     catch on. Perhaps anybody can help?
>>
>>     Somewhere the map origin is changed from the upper edge to the
>>     lower edge, that far I could follow, but then the image extent
>>     (height) and the origin coords (of Y) has been changed. Why? it
>>     seems to be very hard to understand the whole way of building the
>>     image at the right place.
>>
>>     However, in attachment the original rectangle and the changed one
>>     are shown with their values while debugging...
>>
>>     The lower edge of the final image is positioned between those Y
>>     values (@ 53.464) but it needs to be positioned at 53.475....
>>
>>     what is getRasterTansformation() actually doing?
>>
>>
>>     Thanks in advance, if anybody can help. However, that issue
>>     should be fixed, I think. The import of PNG is not even possible,
>>     as I mentioned before..
>>
>>     Regards
>>
>>     Marcel
>>
>>
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>>
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>
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