Sdl_gfx & Circlecolor(...);

[JyCet]

Hi all,
I've updated all my lib with the last Prebuilt library packages for my devkit.
The speed are boosted around 15% to 20%, it's fantastic ! But it dont resolve my program crash when I test to use circleColor(...); of sdl_gfx library

I've included SDL_gfx lib in my makefile
Added header #include <SDL_gfxPrimitives.h> in my program
use it here:
CODE
void fade_out()
{
printf("debut fade out\n");
Uint32 Pnoir = SDL_MapRGB(lcd_back->format, 0, 0, 0);
printf("copie lcd\n");
SDL_BlitSurface(lcd_back,0,bg_tmp,0);
signed int rayon = 200;
printf("premier cercle\n");
circleColor(bg_tmp, 160, 120, rayon, Pnoir);
int Exit = 0;
printf("debut boucle\n");
while(!Exit){
if (rayon<0) Exit=1;
SDL_BlitSurface(bg_tmp,0,lcd_back,0);
circleColor(bg_tmp, 160, 120, rayon, Pnoir);
rafraichir_ecran();
--rayon;
}
printf("fin fade out\n");
}


I've no error at compilation ... but the program crash at circleColor(bg_tmp, 160, 120, rayon, Pnoir);

Any suggestion or help are welcome
JYCET

 

[cobrajs]

CODE

circleColor(bg_tmp, 160, 120, rayon, Pnoir);

What happens when you use circleRGBA instead of circleColor? I always use the former, since I don't have to predefine colors.
CODE

circleRGBA(bg_tmp, 160, 120, rayon, 0, 0, 0, 255);

 

[JyCet]

What happens when you use circleRGBA instead of circleColor? I always use the former, since I don't have to predefine colors.
CODE

circleRGBA(bg_tmp, 160, 120, rayon, 0, 0, 0, 255);

unfortunately circleRGBA crash too
here my telnet log but i've no more information
CODE
...
debut fade out
copie lcd
premier cercle
Fatal signal: Segmentation Fault (SDL Parachute Deployed)

 

[cobrajs]

Ok, I checked the docs for SDL_BlitSurface.

You should have NULL instead of 0, so try:

CODE

SDL_BlitSurface(lcd_back,NULL,bg_tmp,NULL);


and

CODE

SDL_BlitSurface(bg_tmp,NULL,lcd_back,NULL);



I think what happened is that you copied the screen to the temp background, but used 0, so the bg_temp Surface was completely empty. You then tried to draw to it, which caused it to crash.

Hope that helps!

 

[Alex.]

I just downloaded and updated my DevKitGP2X setup, and circleRGBA does not crash. You're using the Open2x tool chain though, right?

 

[JyCet]

Ok, I checked the docs for SDL_BlitSurface.

You should have NULL instead of 0, so try:

CODE

SDL_BlitSurface(lcd_back,NULL,bg_tmp,NULL);


and

CODE

SDL_BlitSurface(bg_tmp,NULL,lcd_back,NULL);



I think what happened is that you copied the screen to the temp background, but used 0, so the bg_temp Surface was completely empty. You then tried to draw to it, which caused it to crash.

Hope that helps!


True the crash comes when I write something on bg_tmp surface !
With NULL it dont crash

Thank you a lot !

For SDL_gfx, I've added another circle function directly in my program and it's very fast, I'll keep it
But I ll test circleColor tomorrow after a long night

@Alex.
I use DevKitGP2X and the update with all lib of open2x site increase the FPS around +15% to +20%.
Now my new game work perfectly at 45MHz for the best audio quality and 35MHz for the lower audio quality