[mapserver-dev] RE: [mapserver-users] mapserver vs mapscript: agg +
transparency + quantize not working
Tiemens, Gerben
Gerben.Tiemens at grontmij.nl
Mon Nov 9 04:50:09 EST 2009
Bug filed:
http://trac.osgeo.org/mapserver/ticket/3201#preview
Greets
Gerben
-----Oorspronkelijk bericht-----
Van: Tiemens, Gerben
Verzonden: Friday, November 06, 2009 11:41 AM
Aan: Tiemens, Gerben
CC: mapser all users; mapserver-dev at lists.osgeo.org
Onderwerp: RE: [mapserver-users] mapserver vs mapscript: agg + transparency + quantize not working
Also imageObj.Write(stream) makes use of the msSaveImageBufferGD()
Which results in the same error message
Is there any other possibility to save the byteArray of an imageobj with renderer AGG or is this just a bug in mapscript C#?
Greetings
Gerben
-----Oorspronkelijk bericht-----
Van: Tiemens, Gerben
Verzonden: Friday, November 06, 2009 9:30 AM
Aan: Tiemens, Gerben
CC: mapser all users; mapserver-dev at lists.osgeo.org
Onderwerp: RE: [mapserver-users] mapserver vs mapscript: agg + transparency + quantize not working
Drilled down further to the problem.
I use ImageObj.getBytes() to get the bytearray and then save the png in an other part of my code.
However, the getBytes() method uses the msSaveImageBufferGD() even when my imageObj/mapObj uses an outputformat with AGG.
This results in an error in the new beta (5.6.0 beta 5) with the message:
- base {"getBytes: General error message. Failed to get image buffer;msSaveImageBufferGD(): Image handling error. Unknown output image type driver: gd/."} System.Exception {System.ApplicationException}
In previous versions the error was not given, but just went further with making a crippled image.
Is there an other method to save the bytearray of an AGG image?
Greetings
Gerben
-----Oorspronkelijk bericht-----
Van: mapserver-users-bounces at lists.osgeo.org [mailto:mapserver-users-bounces at lists.osgeo.org] Namens Tiemens, Gerben
Verzonden: Thursday, November 05, 2009 9:01 PM
Aan: Roger André
CC: mapser all users
Onderwerp: RE: [mapserver-users] mapserver vs mapscript: agg + transparency + quantize not working
Thanks for your reply Roger André,
But i specified my own outputformat in mapscript.
When using this outputformat without the quantize options, the image comes out as wished and configured. (transparent and fullcolor) When using this outputformat with the quantize options on:
-with the CGI mapserv.exe (and the saved mapfile from mapscript) the image is as configured. (transparent and all needed colors in a small png) -with mapscript, the mapobj.draw(), the image is crippled and not as wished.(not transparent, black lines are strange and labels are disapearing) It should be equal to CGI.
I do'nt know why this difference between mapscript and mapserv.exe exists with the same configuration of mapfile.
Has someone an idea?
I tested this on MS4W 2.29 (mapserver 5.2.0) and MS4W 3.0 (mapserver 5.4.2)
Greetings
Gerben
________________________________________
Van: Roger André [randre at gmail.com]
Verzonden: donderdag 5 november 2009 19:55
Aan: Tiemens, Gerben
CC: mapser all users
Onderwerp: Re: [mapserver-users] mapserver vs mapscript: agg + transparency + quantize not working
Hi Tiemens,
Not sure if this helps, but in some of the testing I did with Python mapscript, I specified the following in my code:
map.selectOutputFormat("AGGPNG24")
That seemed to do the trick for me. The script is inline below, in case it might help give context.
Roger
--
#! /usr/bin/python
# mimic the Mapnik 'hello world' at
# http://trac.mapnik.org/wiki/GettingStarted
# based on example in Web Mapping Illustrated
import mapscript
# create a base mapfile
map = mapscript.mapObj()
map.selectOutputFormat("AGGPNG24")
map.name<http://map.name> = "CustomMap"
map.setSize(1000, 500)
#map.setExtent(-180.0, -90.0, 180.0, 90.0) map.setExtent(-22, -36, 60, 38)
map.imagecolor.setRGB(70,130,180)
map.units = mapscript.MS_DD
# set Web image params
map.web.imagepath = "/var/www/tmp/"
map.web.imageurl = "/tmp"
# create layer object
layer = mapscript.layerObj(map)
layer.name<http://layer.name> = "countries"
#layer.type = mapscript.MS_LAYER_LINE
layer.type = mapscript.MS_LAYER_POLYGON
layer.status = mapscript.MS_DEFAULT
layer.data = "/home/randre/gis_data/unep/unep_coastlines.shp"
layer.template = "template.html"
# create a class
class1 = mapscript.classObj(layer)
class1.name<http://class1.name> = "Countries"
# create a style
style = mapscript.styleObj(class1)
style.outlinecolor.setRGB(125,125,125)
style.width = 1
style.color.setRGB(240,240,240)
#style.antialias = mapscript.MS_TRUE
# write the map object into a map file
#map.save("custom.map")
# write out an image using these params
mapimage = map.draw()
mapimage.save("ms_world.png")
--
On Thu, Nov 5, 2009 at 9:04 AM, Tiemens, Gerben <Gerben.Tiemens at grontmij.nl<mailto:Gerben.Tiemens at grontmij.nl>> wrote:
I am busy writing a application with mapscript in C#.
Currently I am facing the earlier mentioned problems of agg + transparent images + quantization.
Is the new MS4W compiled with the quantization options?
The image background is now Black. The labels are dissapearing.
It should be an image wich is completly transparent with some colored lines and some black labels.
Setting the imagecolor will not help me.
Images without quantization options on, are perfect and beautiful png's.
What I am using now is this:
MS4W 3.0 Beta 7 which contains Mapserver 5.4.2
C# mapscript
Mapfile is completely written in C#, so all default options apply.
I saved this mapfile from my mapobj
----------------------
MAP
EXTENT 104952 495303 105452 495803
IMAGECOLOR 255 255 255
IMAGETYPE gif
SIZE 2000 2000
STATUS ON
UNITS METERS
NAME "MS"
OUTPUTFORMAT
NAME "PNG_mapscript"
MIMETYPE "image/png; mode=24bit"
DRIVER "AGG/PNG"
EXTENSION "PNG"
IMAGEMODE "RGBA"
TRANSPARENT TRUE
FORMATOPTION "QUANTIZE_FORCE=on"
FORMATOPTION "QUANTIZE_DITHER=off"
FORMATOPTION "QUANTIZE_COLORS=256"
END
SYMBOL
NAME "circle"
TYPE ELLIPSE
FILLED TRUE
POINTS
1 1
END
END
--
*snip*
--
END
----------------------------------------
In addition to above: further testing revealed that the transparent color is always black.
So if I set
imagecolor 99 99 99
transparent = true
And outputformat to:
OUTPUTFORMAT
NAME "PNG_mapscript"
MIMETYPE "image/png"
DRIVER "GD/PNG"
EXTENSION "PNG"
IMAGEMODE "RGBA"
TRANSPARENT TRUE
FORMATOPTION "QUANTIZE_FORCE=on"
FORMATOPTION "QUANTIZE_COLORS=256"
FORMATOPTION "QUANTIZE_NEW=on"
END
The image appears grey.
The black labels with white backgroundcolor and black shadowcolor in original image are mapped to: white background with gray outline characters and transparent filling and the shadow is grayoutlined with transparent filling. Probably the antialiasing generates the grey outline, the black filling is converted to transparent.
Something is going wrong.
If I set output format to:
OUTPUTFORMAT
NAME "PNG_mapscript"
MIMETYPE "image/png; mode=24bit"
DRIVER "AGG/PNG"
EXTENSION "PNG"
IMAGEMODE "RGBA"
TRANSPARENT TRUE
FORMATOPTION "QUANTIZE_FORCE=on"
FORMATOPTION "QUANTIZE_DITHER=off"
FORMATOPTION "QUANTIZE_COLORS=256"
END
The same applies for the text/labels, but background of the image is now black in all circumstances (no matter what color of imagecolor setting.
---------------------------------------------------
Further research drills down to where the problem may occur:
If i test my saved mapfile from mapscript into the apache/cgi-bin/mapserv.exe
The image is coming out as it should be.
Transparent background, features like it should be, and text also as it should be., but if I use the draw() method from mapscript, it comes out crippled.
Am i doing something wrong in mapscript? Are there configurations that I may miss in mapscript that are default in mapserv.exe?
I also do'nt know if this is a problem of Mapserver or MS4W, therefore crossposting it.
Greetings
Gerben
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