[ka-Map-users] Ka-map and AGG?
Hans Castorp
hanscastorp76 at yahoo.es
Tue Mar 4 09:47:19 EST 2008
Doesn't works for me. I'm still getting black backgrounds...
-----Mensaje original-----
De: Paul Spencer [mailto:pspencer at dmsolutions.ca]
Enviado el: martes, 04 de marzo de 2008 15:13
Para: Sacha Black
CC: Hans Castorp; ka-map-users at lists.maptools.org
Asunto: Re: [ka-Map-users] Ka-map and AGG?
I think there is a small issue in tile.php, we need to change the
following block around line 313:
if ($useAlphaCh) {
ImageAlphaBlending($oTile, false);
imagesavealpha($oTile, true);
}
to:
if ($useAlphaCh) {
imagefill($oTile, 0, 0, imagecolorallocatealpha($oTile, 0, 0, 0,
127));
ImageAlphaBlending($oTile, false);
imagesavealpha($oTile, true);
}
Note the addition of the imagefill - this is critical to making the
tiles come out transparent. I'm pretty sure this works. What I don't
know is what happens if you replace the color black (0,0,0) with the
map's background color ($oMap->imagecolor->red, $oMap->imagecolor-
>green, $oMap->imagecolor->blue).
If someone could test this and confirm it works, we can commit
tile.php with the change.
Cheers
Paul
On 4-Mar-08, at 2:32 AM, Sacha Black wrote:
> Hi Hans,
>
> I reproduced your error. :( in ms4w 2.2.7
>
> Maybe I missed this before because I was just testing with gmap, and
> my bounds didn't go outside the edge of the base data. The AGGA
> rendering looks good like you say, and that's what I saw, but with
> black outside the base data.
>
> But I don't know why it's happening. I added TRANSPARENT ON to the
> OUTPUTFORMAT and it made no difference like this:
>
> OUTPUTFORMAT
> NAME 'AGGA'
> DRIVER AGG/PNG
> IMAGEMODE RGBA
> TRANSPARENT ON ////// <- no difference with this ?
> END
>
> Also tried to add TRANSPARENCY alpha to all the layers, and no
> change.
>
> it seems that when the tiles get created from the RGBA pngs, they are
> losing the transparency. I'm not sure where this is happening. We
> can't change the $GLOBALS['szImageCreateFunction'] back to
> "imagecreate" from "imagecreatetruecolor"because this will create an
> 8bit PNG tile, and you will lose the extra colors in the downgrade.
> Although appaently the 8 bit PNG has no problem with retaining
> transparency.....
>
>> From your example attachment it looks like maybe your overlays will
> suffice with just AGG ? did you try it:
>
> OUTPUTFORMAT
> NAME 'AGG'
> DRIVER AGG/PNG
> IMAGEMODE RGB
> END
>
> The tiles will be smaller in size and transparency is retained in my
> tests. It's not a real solution, but it might help your situation
> while we figure out why AGGA is not right.
>
> Sacha
>
>
> On Mon, Mar 3, 2008 at 10:59 AM, Hans Castorp
> <hanscastorp76 at yahoo.es> wrote:
>> Hi Lorenzo,
>>
>> Yes, I have created OUTPUTFORMAT AGGA in my mapfile.
>>
>> I you refer to put METADATA imageformat "agga", yes I did it.
>> Despite of it,
>> reading th documentation, only values accepted for imageformat are:
>> "imageformat" [DITHERED|PNG24|PNG|JPEG|GIF]
>>
>> And yes, I'm using MS4W...
>>
>> -----Mensaje original-----
>> De: Lorenzo Becchi [mailto:lorenzo at ominiverdi.com]
>> Enviado el: lunes, 03 de marzo de 2008 19:51
>> Para: Hans Castorp
>> CC: 'Sacha Black'; ka-map-users at lists.maptools.org
>>
>>
>> Asunto: Re: [ka-Map-users] Ka-map and AGG?
>>
>> Hans,
>> have you created the OUTPUTFORMAT AGGA in your mapfile?
>> have you put MEDATA format "AGGA" to your layer's metadata?
>>
>>
>> another problem could be that it seems you're using MS4W.
>> I've tested on Mac OS X and I guess Sacha did it in Linux. Am I
>> wrong?
>> hopefully, I am
>>
>> ciao
>> Lorenzo
>>
>>
>>
>> Hans Castorp wrote:
>>> Hi,
>>>
>>> Using your configuration my transparent layers are rendered with
>>> Black
>>> background (as you can see in the attachment)... First time I see
>>> it...
>>>
>>> I was suffering several troubles trying to achieve a good agg
>>> redering.
>> With
>>> your configuration all seems to work fine but this "little"
>>> trouble :) All
>> I
>>> have to do is change this black background into transparent...
>>>
>>> Only a couple of questions:
>>>
>>> I am using IMAGETYPE AGGA in my map section, is it right???
>>>
>>>
>>> I am also using 'format' =>'AGGA' in my config.php file:
>>>
>>> $aszGMap = array (
>>> 'title' => 'gmap',
>>> 'path' => 'C:/ms4w/apps/ka-m1.0/mapdata/xxx/xxx.map',
>>> 'scales' => array( 200000, 150000, 100000, 50000, 25000 ,
>>> 10000,
>>> 5000 ),
>>> 'format' =>'AGGA'
>>> );
>>>
>>> Is it right too?
>>>
>>> Thanks in advance.
>>>
>>>
>>>
>>>
>>>
>>> -----Mensaje original-----
>>> De: Sacha Black [mailto:sacha.black at gmail.com]
>>> Enviado el: lunes, 03 de marzo de 2008 18:09
>>> Para: Hans Castorp
>>> CC: Lorenzo Becchi; ka-map-users at lists.maptools.org
>>> Asunto: Re: [ka-Map-users] Ka-map and AGG?
>>>
>>> Hans,
>>>
>>> The corrections I made for Lorenzo are only typos.....
>>>
>>> check to see if your OUTPUFORMAT settings are like this (or else
>>> they
>>> will not match the settings in config.php):
>>>
>>> OUTPUTFORMAT
>>> NAME 'AGG'
>>> DRIVER AGG/PNG
>>> IMAGEMODE RGB
>>> END
>>>
>>> OUTPUTFORMAT
>>> NAME 'AGGA'
>>> DRIVER AGG/PNG
>>> IMAGEMODE RGBA
>>> END
>>>
>>> OUTPUTFORMAT
>>> NAME 'AGG_JPEG'
>>> DRIVER AGG/JPEG
>>> IMAGEMODE RGB
>>> END
>>>
>>> Sacha
>>>
>>>
>>>
>>> On Mon, Mar 3, 2008 at 12:51 AM, Hans Castorp <hanscastorp76 at yahoo.es
>>> >
>>> wrote:
>>>
>>>> Making these 2 changes, my map looses transparency and all layers
>>>> are
>>>>
>>> drawn
>>>
>>>> with black background...
>>>>
>>>>
>>>> -----Mensaje original-----
>>>> De: ka-map-users-bounces at lists.maptools.org
>>>> [mailto:ka-map-users-bounces at lists.maptools.org] En nombre de
>>>> Lorenzo
>>>>
>>> Becchi
>>>
>>>> Enviado el: viernes, 29 de febrero de 2008 22:54
>>>> Para: Sacha Black
>>>> CC: ka-map-users at lists.maptools.org
>>>> Asunto: Re: [ka-Map-users] Ka-map and AGG?
>>>>
>>>>
>>>>
>>>> lovely, thanks
>>>> :-)
>>>>
>>>> I've updated CVS
>>>>
>>>> Lorenzo
>>>>
>>>>
>>>>
>>>>
>>>> Sacha Black wrote:
>>>>> Hi Lorenzo,
>>>>>
>>>>> I've tested what you sent, and there are two corrections (see the
>>>>> ////// comments below):
>>>>>
>>>>> case "AGGA":
>>>>> $GLOBALS['szMapImageFormat'] = 'AGGA';
>>>>> $GLOBALS['szMapImageCreateFunction'] = "imagecreatefrompng";
>>>>> $GLOBALS['szImageExtension'] = '.png';
>>>>> $GLOBALS['szImageCreateFunction'] =
>>>>> "imagecreatetruecolor"; /////
>>>>> <-- not 'imagecreate'
>>>>> $GLOBALS['szImageOutputFunction'] = "imagepng";
>>>>> $GLOBALS['szImageHeader'] = 'image/png';
>>>>> break;
>>>>>
>>>>> case "AGG_JPEG":
>>>>> $GLOBALS['szMapImageFormat'] = 'JPEG';
>>>>> $GLOBALS['szMapImageCreateFunction'] = "imagecreatefromjpeg";
>>>>> $GLOBALS['szImageExtension'] = '.jpg';
>>>>> $GLOBALS['szImageCreateFunction'] = "imagecreatetruecolor";
>>>>> $GLOBALS['szImageOutputFunction'] = "imagejpeg"; ///// <-- not
>>>> 'imagejpg'
>>>>> $GLOBALS['szImageHeader'] = 'image/jpeg';
>>>>> break;
>>>>>
>>>>> With these 2 corrections, everything works as expected.
>>>>>
>>>>> thanks,
>>>>>
>>>>> Sacha
>>>>>
>>>>>
>>>>> On Sun, Feb 24, 2008 at 1:07 PM, Lorenzo Becchi
>>>>
>>> <lorenzo at ominiverdi.com>
>>>
>>>> wrote:
>>>>>
>>>>>
>>>>>> Hi Sasha,
>>>>>> it seems to me it should work.
>>>>>>
>>>>>> I've set the outputformats as suggested by this page:
>>>>>> http://mapserver.gis.umn.edu/docs/howto/agg-rendering-specifics
>>>>>>
>>>>>> then I've set LAYER's METADATA
>>>>>> imageformat "AGGA"
>>>>>>
>>>>>> seems to me, it didn't worked until I've not changed config.php
>>>>>> with
>>>>>> this lines:
>>>>>>
>>>>>> case "AGG":
>>>>>> $GLOBALS['szMapImageFormat'] = 'PNG';
>>>>>> $GLOBALS['szMapImageCreateFunction'] =
>>>>
>>> "imagecreatefrompng";
>>>
>>>>>> $GLOBALS['szImageExtension'] = '.png';
>>>>>> $GLOBALS['szImageCreateFunction'] = "imagecreate";
>>>>>> $GLOBALS['szImageOutputFunction'] = "imagepng";
>>>>>> $GLOBALS['szImageHeader'] = 'image/png';
>>>>>> break;
>>>>>> case "AGGA":
>>>>>> $GLOBALS['szMapImageFormat'] = 'AGGA';
>>>>>> $GLOBALS['szMapImageCreateFunction'] =
>>>>
>>> "imagecreatefrompng";
>>>
>>>>>> $GLOBALS['szImageExtension'] = '.png';
>>>>>> $GLOBALS['szImageCreateFunction'] = "imagecreate";
>>>>>> $GLOBALS['szImageOutputFunction'] = "imagepng";
>>>>>> $GLOBALS['szImageHeader'] = 'image/png';
>>>>>> break;
>>>>>> case "AGG_JPEG":
>>>>>> $GLOBALS['szMapImageFormat'] = 'JPEG';
>>>>>> $GLOBALS['szMapImageCreateFunction'] =
>>>>
>>> "imagecreatefromjpeg";
>>>
>>>>>> $GLOBALS['szImageExtension'] = '.jpg';
>>>>>> $GLOBALS['szImageCreateFunction'] =
>>>>
>>> "imagecreatetruecolor";
>>>
>>>>>> $GLOBALS['szImageOutputFunction'] = "imagejpg";
>>>>>> $GLOBALS['szImageHeader'] = 'image/jpeg';
>>>>>> break;
>>>>>>
>>>>>>
>>>>>> I've tested only
>>>>>> AGGA
>>>>>>
>>>>>> can you please do some more tests?
>>>>>>
>>>>>> once confirmed I'll post changes on CVS
>>>>>>
>>>>>> thanks
>>>>>> Lorenzo
>>>>>>
>>>>>>
>>>>>>
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__________________________________________
Paul Spencer
Chief Technology Officer
DM Solutions Group Inc
http://www.dmsolutions.ca/
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