DreamWork (pushing the limits)

[Patrice Terrier]

Plasma like animation changing the background of a GDImage composited skinned window.

The background animation is fully cooperative with the child controls drawn on the foreground.

With this new kind of window, it is better to use a slow animation and smooth color transition to avoid user's distraction, if you see what i mean 

Screen shot:



Of course hard to figure the result of the animation with this static image 

Note: I had a hard time to keep the CPU usage as small as possible (5% to 6% on VISTA)

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[Petr Schreiber]

Hi Patrice,

another impressive demo!

It works nicely on Windows XP SP2, redrawing works ok, just the clock flickers from time to time.

CPU use is around 20% by default, but I have single core CPU Sempron 64bit 3400+, which is not designed to be superfast.
I have new graphic card, GeForce 9 series, so this should not be bottleneck

Here are CPU results for various animation timings:
10ms - 99% CPU
100ms - 30% CPU
200ms - 20% CPU
400ms - 10% CPU


Thanks,
Petr

[Patrice Terrier]

Petr,

Thanks for the feedback.

I can see a big difference between a single and a dual core processor.

The clock shoudn't flicker, because all the child controls are redrawn in composited mode.

Anyway the solution could be to use the WM_PRINT message and redraw everything to a private memory DC then use one single BitBlt instead of the classic INVALIDATE/WM_PAINT currently being used.

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[Patrice Terrier]

The first post of this thread has been updated, to fix the ZIP file corruption caused by the "Server Collapse".

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