Re: Alex Villacís Lasso : uxtheme: Speed up UXTHEME_SizedBlt in the ST_TILE by building an appropriately-sized memory bitmap out of the tile instead of iterating with UXTHEME_Blt () directly.

[Alex Villací­s Lasso]

Frank Richter escribio':
> On 22.04.2008 13:47, Alexandre Julliard wrote:
> > uxtheme: Speed up UXTHEME_SizedBlt in the ST_TILE by building an appropriately-sized memory bitmap out of the tile instead of iterating with UXTHEME_Blt() directly.
>
> But does that keep the alpha channel intact?
>
> -f.r.

I directed my themes to the ones on the WinXP partition, and saw no 
difference after the patch, other than the increase in speed. However, 
this might not be a proper test case. I used CreateCompatibleDC out of 
the source HDC, and CreateCompatibleBitmap in the same way. If these 
operations preserve the alpha channel, and BitBlt(SRCCOPY) does too, the 
patch as a whole should be correct. Have you seen a theme that uses 
alpha and breaks with my patch?