Picture blending speeds

[Dave Robertson <dave at cs dot otago dot ac dot nz>]

I'm working on an app that needs to blend large images so I tested some 
of the methods available to see which was fastest.
For anyone interested here are the results:

The test was to draw a 1024 x 527 picture onto another picture of the 
same size, with 50% transparency.
The times are typical times over several trials. The times are measured 
using the Microseconds function.

                                                                OSX 10.3.3      
        Win XP
                                                                466 Mhz G4      
        1GHz PIII

DrawPicture                                             610 mSec                
        150 mSec
DrawPicture useOldRenderer=True         156 mSec                        n/a
Einhugur PictureEffects 3.1 Blend               270 mSec                        
510 mSec
Component X Graphics Composite            55 msec                       270 mSec
Micono RGBSurface 1.6.0                 245 mSec                        900 msec





Dave Robertson

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