| Re: pixmap problem [message #36229 is a reply to message #6988] |
Thu, 28 August 2003 09:36   |
Steve Ready
Messages: 6
Registered: July 2000
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Junior Member |
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Well, min would be 0 and max would be 255 for the pixmaps that worked and 0
for the ones that didn't. Since the PLOTS command only turns on one pixel in
the image, total=max for them all.
Steve
"Reimar Bauer" <R.Bauer@fz-juelich.de> wrote in message
news:bika7t$1g9f$1@zam602.zam.kfa-juelich.de...
> Steve Ready wrote:
>
> Dear Steve,
>
> in addition to total what shows min and max.
>
> Reimar
>
>> Folks,
>>
>> I am hoping someone can shed some light on this problem.
>>
>> I am creating a large image in graphics memory with WINDOW,/PIXMAP and
>> drawing to it using the PLOTS routine. I have discovered that if I
specify
>> a pixmap size larger than a particular value, dependent on the graphics
>> card, I am able to allocate the graphics memory with no problem but am
not
>> able to draw to it. I have verified this on an WinXP and Win2K machine,
>> both with 32mb graphics cards. Sample demo test code follows with
typical
>> output. This is slightly modified code from RSI website for testing
>> available graphics memory size. Any clues?
>>
>> Thanks, Steve
>>
>> Steve Ready
>> Sr. Member of the Research Staff
>> Electronic Materials Lab
>> Palo Alto Research Center
>> 3333 Coyote Hill Rd.
>> Palo Alto, CA 94034
>> Voice: 650-812-4135
>> FAX: 650-812-4105
>> Email: ready@parc.com
>> http://www.parc.com/ready
>>
>> ;*********************************************************** ***
>> PRO test_pixmap_size
>>
>> cnt = 40L
>> increment = 100
>> off=3000
>> i = 1
>>
>> ; Catch when the creation of a pixmap
>> ; fails, and report the previous
>> ; pixmap dimensions that succeeded.
>>
>> CATCH, errStat
>> IF (errStat NE 0) THEN BEGIN
>> x = ((i-1)*increment)+off
>> y = x
>> PRINT, 'Suggested maximum pixmap size: ', x, ' by ', y
>> RETURN
>> ENDIF
>>
>> ; Loop through potential pixmap dimensions.
>> FOR i=1,cnt DO BEGIN
>>
>> x = (i*increment)+off
>> y = (i*increment)+off
>> print, 'Trying: ', x, ' by ', y
>>
>> WINDOW, /PIXMAP, /FREE, XSIZE=x, YSIZE=y
>> plots,[.5,.5],[.5,.5],/normal
>> print, total(tvrd())
>> WDELETE, !D.WINDOW
>>
>> ENDFOR
>> END
>> ;*********************************************************** ***
>>
>> Result is:
>>
>> IDL> test_pixmap_size
>> Trying: 3100 by 3100
>> 255.000
>> Trying: 3200 by 3200
>> 255.000
>> Trying: 3300 by 3300
>> 255.000
>> Trying: 3400 by 3400
>> 255.000
>> Trying: 3500 by 3500
>> 0.000000
>> Trying: 3600 by 3600
>> 0.000000
>> Trying: 3700 by 3700
>> 0.000000
>> Trying: 3800 by 3800
>> 0.000000
>> Trying: 3900 by 3900
>> 0.000000
>> Trying: 4000 by 4000
>> 0.000000
>> Trying: 4100 by 4100
>> 0.000000
>> Trying: 4200 by 4200
>> 0.000000
>> Trying: 4300 by 4300
>> 0.000000
>> Trying: 4400 by 4400
>> 0.000000
>> Trying: 4500 by 4500
>> 0.000000
>> Trying: 4600 by 4600
>> 0.000000
>> Trying: 4700 by 4700
>> 0.000000
>> Trying: 4800 by 4800
>> 0.000000
>> Trying: 4900 by 4900
>> Suggested maximum pixmap size: 4800 by 4800
>
> --
> Forschungszentrum Juelich
> email: R.Bauer@fz-juelich.de
> http://www.fz-juelich.de/icg/icg-i/
> ============================================================ ======
> a IDL library at ForschungsZentrum Juelich
> http://www.fz-juelich.de/icg/icg-i/idl_icglib/idl_lib_intro. html
>
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