Messages

1

Window / Holding down Lots of keys

« on: April 02, 2010, 07:48:17 pm »

Try a search for n-key rollover and take a look at this Wikipedia article.

2

Window / MouseWheel Delta Value

« on: January 15, 2010, 10:55:34 am »

That particular mouse does have a smooth scrolling wheel.

If this helps any, I've found that in my own Win32 code (not SFML related) I had to accumulate the delta value (in the high word of wparam) and check if it added up to WHEEL_DELTA or more.

http://msdn.microsoft.com/en-us/library/ms645617%28VS.85%29.aspx

To use this feature, you can either add the incoming delta values until WHEEL_DELTA is reached (so for a delta-rotation you get the same response), or scroll partial lines in response to the more frequent messages.

3

General discussions / Benchmark : SDL vs SFML

« on: January 11, 2010, 08:23:46 am »

I spent a bit of time and gathered the necessary libraries (it took some time) to provide an additional data point for this benchmark. I used Jonny D's version of the benchmark. This is on a Core 2 Quad @ 3.0GHz, 8GB RAM, Nvidia 8800GT under Vista 64-bit and Visual Studio 2008.

There were some visual inconsistencies in the dynamic text benchmark.

Code: [Select]

1/ Test : sprites
SDL  displayed 168 frames
SFML displayed 736 frames
--> SFML is 4.38x as fast as SDL

2/ Test : alpha-blended sprites
SDL  displayed 12 frames
SFML displayed 505 frames
--> SFML is 42.08x as fast as SDL

3/ Test : per-pixel alpha-blended sprites
SDL  displayed 16 frames
SFML displayed 709 frames
--> SFML is 44.31x as fast as SDL

4/ Test : rotating sprites
SDL  displayed 30 frames
SFML displayed 691 frames
--> SFML is 23.03x as fast as SDL

5/ Test : static text
SDL  displayed 756 frames
SFML displayed 7273 frames
--> SFML is 9.62x as fast as SDL

6/ Test : dynamic text
SDL  displayed 116 frames
SFML displayed 3697 frames
--> SFML is 31.87x as fast as SDL

7/ Test : dynamic text w/NFont
SDL  displayed 606 frames
SFML displayed 4575 frames
--> SFML is 7.55x as fast as SDL