Color-/Lineshifts under Windows?

[Adam Goode]

Marco,

Glad it fixes the problem, at least partially. On Windows I never run
test.c so I never see this.

The black dots are more troubling, Mirax is a difficult format to
render, and I have had many such bugs like this in the past. After
trying it, I do see the dots on Linux.

I think I know why the dots are visible now and not before, I will try
to look into it. At the very least, I will record a bug. :)


Thanks,

Adam


On 08/03/2010 08:18 PM, Marco Feuerstein wrote:
> Thanks for your quick reply.
> Writing in binary seems to fix the color problems, but the black dotted pattern remains (see updated test7-09.ppm).
> Does this also happen under Linux?
> Best,
> Marco
> 
> 
>> -----Original Message-----
>> From: Adam Goode [mailto:agoode at andrew.cmu.edu]
>> Sent: Dienstag, 3. August 2010 18:58
>> To: Marco Feuerstein
>> Cc: openslide-users at lists.andrew.cmu.edu
>> Subject: Re: Color-/Lineshifts under Windows?
>>
>> On 08/03/2010 12:49 PM, Marco Feuerstein wrote:
>>> Hi Adam,
>>>
>>> we are experiencing strange problems when loading MIRAX files under
>> Windows.
>>> For example, when loading the dataset from
>>> http://openslide.cs.cmu.edu/download/openslide-testdata/Mirax/CMU-
>> 1.zip and
>>> setting
>>>    bool skip = false;
>>> in line 360 of test.c, some of the resulting ppm images look like the
>>> attached ones. Some lines are shifted, some colors, too (e.g. on
>>> test7-10.ppm), and sometimes a black dotted pattern appears (e.g. on
>>> test7-09.ppm visible on the sample).
>>> Do you have any idea where we can start digging into the problem?
>>> Thanks a lot for your help again!
>>
>> Hmm, sorry you're having problems.
>>
>> Can you try changing:
>>
>>   FILE *f = fopen(filename, "w");
>>
>> to
>>
>>   FILE *f = fopen(filename, "wb");
>>
>> in write_as_ppm?
>>
>> Let me know if this works.
>>
>>
>>
>> Thanks,
>>
>> Adam
> 


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