Are there automated tests that verify that Wine's drawing operations produce the same visual output as in Windows?

Alexander Almaleh sashoalm at gmail.com
Mon Jul 14 02:05:53 CDT 2014


I see that there is no call to Polygon() anywhere in the tests. I might try
adding a test case for it.


On Sun, Jul 13, 2014 at 9:20 PM, Alexander Almaleh <sashoalm at gmail.com>
wrote:

> Thanks, I'll look into it.
> On Jul 13, 2014 8:09 PM, "Ken Thomases" <ken at codeweavers.com> wrote:
>
>> On Jul 13, 2014, at 11:39 AM, Alexander Almaleh <sashoalm at gmail.com>
>> wrote:
>>
>> While testing the Polygon() function for my bug report -
>> https://bugs.winehq.org/show_bug.cgi?id=36891, I used a test program
>> that performs a Polygon() operation on a memory device context, and then
>> saves it to a bitmap - i.e. a *.bmp file.
>>
>> I then compared the bitmaps produced under Windows and Wine using a
>> program I wrote in Qt, that just compares width/height, and then makes a
>> pixel-by-pixel comparison (and the Polygon() function did indeed produce a
>> slightly different bitmap).
>>
>> Since this process can be easily automated, I'm wondering if such a
>> framework is already being used? If not, I could probably make a sample
>> test program and image comparison tool, if anyone is interested.
>>
>> It would be fairly easily to spot all kinds of bugs in the drawing
>> functions using such a testing system.
>>
>>
>> There are such tests.  They were central to the development of the DIB
>> engine.  See dlls/gdi32/tests/dib.c.
>>
>> The tests run under Wine or on Windows, not both in concert.  They can't
>> directly take output from one and compare to the other.  Also, one doesn't
>> want to store a slew of bitmaps into the tests for pixel-wise comparison.
>>  So, the approach is to take a hash of the bitmap data and compare to a
>> hash of a known-good bitmap.
>>
>> -Ken
>>
>>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.winehq.org/pipermail/wine-devel/attachments/20140714/4e81a439/attachment.html>


More information about the wine-devel mailing list