[Bug 11892] GdipCreateBitmapFromFile & GdipCreateBitmapFromStream give upside down bitmap

[wine-bugs at winehq.org]

http://bugs.winehq.org/show_bug.cgi?id=11892





--- Comment #2 from bill lam <cbill.lam at gmail.com>  2008-06-12 20:03:35 ---
problem still exist. it does not crash so that is a log necessary? The code the
reproduce error is as following, threat it as pseudo-code if the syntax looks 
weird to you.

readimg1=: 3 : 0
BMP=. TOK=. ,_1
DATA=. i.4%~#BitmapData
assi rc [ 'rc TOK'=. 2{. GdiplusStartup TOK;GdiplusStartupInput;0
GdipCreateBitmapFromFile (u:y,2#{.a.);BMP
assi rc [ 'rc DATA'=. 0 _1{ GdipBitmapLockBits
({.BMP);(<0);ImageLockModeRead;PixelFormat32bppARGB;DATA
'w h s f p r'=. DATA
1!:2&2] DATA
z=. |.^:(s<0) w&{."1^:(w~:|s%4) (h,|s%4)$memr p,((s<0)*s*<:h),(h*<.|s%4),JINT
GdipBitmapUnLockBits ({.BMP);DATA
GdipDisposeImage {.BMP
GdiplusShutdown {.TOK
z
)

pay attention to the negative stride returned in GdipBitmapLockBits.


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