Re: GDI can be fast!

o//annabee wrote:
Hmm. Ok. On my card, the timings for 16 bit and 32 bit is identical.



Hi,

Just to make myself clear, the problem is selecting a 32 bit image into a 16 bit DC. Matching the resolution to the DC should present nearly identical results, i.e. 16 bit to 16 bit or 32 bit to 32 bit, however 32 to 16 should slow things down a bit as the color table has to be generated. Testing on my systems selecting and deselecting a 1024x1024 32 bit image with 1 meg colors (1st pixel = 000000, 2nd = 000001 etc..) resulted in a noticeable penalty for different color depths. For some reason my Athlon64 performed better than either the PIII or P4 even in 2 bit mode.

At any rate this is an interesting discussion and I would like to continue it if Hutch and Betov can take their stupidity elsewhere. Do you have any test results with specific GDI API calls ?

Donkey
.

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