[Mapserver-dev] SWF output -> FORMATOPTION "OUTPUT_MOVIE=SINGLE" broken?

[Yewondwossen Assefa]

I have checked the code to see what would be the problem. Here is the 
situation :
   - when rederning in OUPUT_MOVIE = 'SINGLE' mode, all the drawing 
passes through the GD functions : basically every thing is drawn in a 
temporary GD image as if you had specified a GD format (like PNG, GIF 
...).  At the end this GD image is converted and inserted inside the movie.

   - when rendering in mode MULTIPLE, you get vector output and all the 
code is handled through the swf driver.

  As for the fonts, the problem you probably have is that your classes 
refer to an FDB font that is handled properly in the vector case 
(MULTIPLE)  but can not work in the raster case (SINGLE), since GD which 
is used to draw the text does not understand the FDB font.

  Quick solution to your problem: if you use your mapfile in SINGLE 
mode, use true type fonts in your classes. If you want vector output 
using the MULTIPLE mode, use the FDB fonts.

  The real solution would be for ming (which is the library used to 
generate the swf files), to support True Type fonts.

  I am also checking to see if there can be a small hack that can be 
introduced inside the mapserver swf code to correct this problem.

  I have enetered a bug in mapserver (Bug 733) 
http://mapserver.gis.umn.edu/bugs/show_bug.cgi?id=733 to follow up on this.

Later,

Steve Spicklemire wrote:

> Hi Folks,
> 
> I'm trying to track down a apparent bug in rendering labels in SWF 
> output when OUPUT_MOVIE is 'SINGLE'.
> 
> The code is a bit confusing to me (no doubt primarily due to the fact 
> that I don't understand why it's doing things the way it is!). It 
> appears that this bit of code in mapswf.c/msDrawLabelCacheSWF is not 
> working:
> 
> /* -------------------------------------------------------------------- */
> /*      if the output is single (SWF file based on one raster that      */
> /*      will contain all  the rendering), draw the lables using the     */
> /*      GD driver.                                                      */
> /* -------------------------------------------------------------------- */
>     if(strcasecmp(msGetOutputFormatOption(image->format,
>                                           "OUTPUT_MOVIE",""),
>                   "SINGLE") == 0)
>     {
>         imagetmp = (imageObj *)image->img.swf->imagetmp;
>         msImageInitGD( imagetmp, &map->imagecolor);
>         msDrawLabelCacheGD(imagetmp->img.gd, map);
>         oShape = gdImage2Shape(imagetmp->img.gd);
>         //nTmp = image->img.swf->nCurrentMovie;
>         SWFMovie_add(GetCurrentMovie(map, image), oShape);
>         return 0;
>     }
> 
> I don't know enough about the GD methods to tell for sure what's going 
> on. When in MULTIPLE mode I get nice vector fonts drawn on each layer 
> with labels. WHen in SINGLE I see no text anywhere. ;-(
> 
> I've had reasonable success sorting out bugs in mapswf.c before.. but 
> this one has me (momentarily) stumped!
> 
> Any thoughts about how to track this one down would be appreciated.
> 
> 
> BTW... I'm pretty sure this actually *worked* at some point... wierd.
> 
> thanks!
> -steve
> 
> _______________________________________________
> Mapserver-dev mailing list
> Mapserver-dev at lists.gis.umn.edu
> http://lists.gis.umn.edu/mailman/listinfo/mapserver-dev
> 


-- 
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Assefa Yewondwossen
Software Analyst

Email: assefa at dmsolutions.ca
http://www.dmsolutions.ca/

Phone: (613) 565-5056 (ext 14)
Fax:   (613) 565-0925
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