Laurent Defert Simonneau wrote:
Using the map 'Cowland', on a pentium 4 M, at 2.0GHz, with a GeForce 4:
- 20~30 fps in 640x480
- 10~15 fps in 800x600
Which is quite slow compared to your performance :(
Your results are not very different as mines ( as framerate is not the
same on every maps and is not constant)
With the map 'Cowland' ( which have a lot of alpha belended wind
particules "nuages")
Alpha belnded ground :
-> 21-32 fps in 800x600
-> 15-20 fps in 1024x700
CPU usage : 90%
Colorkey blitted ground :
-> 40-50 fps in 800x600
-> 28-33 fps in 1024x700
CPU usage : 80%
In order to switch the ground transparency to "colorkey", add a line in
your ~/.wormux/config.xml file like in the attached file at line 14 :
<transparency>colorkey</transparency>
I don't know many things about SDL flags..
If it helps, there is a function in one of paragui examples, which
initializes sdl with the best gfx flags. It's in the test/dblbuffer.cpp,
or the main part of this code in attachement to this mail.
I have read this file but is there things that looks strange to me:
1) They use the SDL_HWSURFACE flag when your app is fullscreen what is a
non sense to me.
SDL_HWSURFACE gain to be activated when the system support hardware
surface ( fullscreen or not, that make no differences) and for surface
you don't want to access/modify by the CPU (i.e static surfaces)
2) It's impossible for a program to determine if this is good or not to
use the SDL_RLEACCEL.
Only the coder can know it as it is good when:
- the surface contains mainly long sequences of pixels with the same
alpha/color ( which is the case with our ground tiles)
- the surface is intented to be mainly blitted and only a few times
accessed/modified.
I will write a page about software vs hardware surfaces and alpha
blending vs colorkey blitting on the wiki.
a+
Jean-Christophe
--
Jean-Christophe Duberga - http://jeanchristophe.duber.free.fr
webmaster du site MNEA - http://www.mnea.fr
<?xml version="1.0" encoding="iso-8859-1"?>
<config>
<data_dir>../data/</data_dir>
<locale_dir>../locale/</locale_dir>
<map>Pirates</map>
<teams>
<team>pink_floyd</team>
<team>poulpe</team>
</teams>
<video>
<width>800</width>
<height>600</height>
<full_screen>0</full_screen>
<transparency>alpha</transparency>
</video>
<sound>
<active>1</active>
<music>1</music>
<effects>1</effects>
<frequency>22050</frequency>
</sound>
<game_mode>classic</game_mode>
</config>
