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SDL CVS working?
Posted: Sat Mar 31, 2007 7:27 pm
by JerryS
Hi,
I downloaded and compiled the complete sdk and some libs from cvs. However I can't get anything to work with sdl. I tested several programs such as reminiscence ps2port and a few others, but all I get with my own compiled versions is a black screen. Could someone please give me some pointers or try the latest sdl version out. Probably I've just forgotten something obvious. I'm developing on linux btw.
Posted: Fri Dec 19, 2008 9:18 pm
by protomank
I am having the same problem.
Anyone?
Posted: Sat Dec 20, 2008 6:58 am
by J.F.
EDIT: Whoops! This was ps2 SDL. :)
I couldn't get the svn SDL for the PS2 to work either... need to look into that sometime.
Posted: Sat Dec 20, 2008 10:28 pm
by protomank
I just got it working fine, was able to run some tests and draw on the screen just fine - I could already create a clone of atari 2600 adventure, hehehehe.
Posted: Sun Dec 21, 2008 12:35 pm
by J.F.
Did you have to do anything special?
Posted: Sun Dec 21, 2008 11:26 pm
by protomank
No, just started using print_scr in case there was any SDL errors, avoiding printfs. It seems like printf using the method I like (no ps2link, just good and old uLaunchelf and a pendrive) is not a good thing, it gives a black screen often, so just avoid it.
Here is the test code I compiled and works fine:
/* Simple program: Loop, watching keystrokes
Note that you need to call SDL_PollEvent() or SDL_WaitEvent() to
pump the event loop and catch keystrokes.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <debug.h>
#include <SDL.h>
#define WIDTH 640
#define HEIGHT 480
#define BPP 4
#define DEPTH 32
void setpixel(SDL_Surface *screen, int x, int y, Uint8 r, Uint8 g, Uint8 b)
{
Uint32 *pixmem32;
Uint32 colour;
colour = SDL_MapRGB( screen->format, r, g, b );
pixmem32 = (Uint32*) screen->pixels + y + x;
*pixmem32 = colour;
}
void DrawScreen(SDL_Surface* screen, int h)
{
int x, y, ytimesw;
if(SDL_MUSTLOCK(screen))
{
if(SDL_LockSurface(screen) < 0) return;
}
for(y = 0; y < screen->h; y++ )
{
ytimesw = y*screen->pitch/BPP;
for( x = 0; x < screen->w; x++ )
{
setpixel(screen, x, ytimesw, (x*x)/256+3*y+h, (y*y)/256+x+h, h);
}
}
if(SDL_MUSTLOCK(screen)) SDL_UnlockSurface(screen);
SDL_Flip(screen);
}
int main(int argc, char* argv[])
{
SDL_Surface *screen;
SDL_Event event;
int keypress = 0;
int h=0;
if (SDL_Init(SDL_INIT_VIDEO) < 0 ) return 1;
if (!(screen = SDL_SetVideoMode(WIDTH, HEIGHT, DEPTH, SDL_FULLSCREEN|SDL_HWSURFACE)))
{
SDL_Quit();
return 1;
}
while(!keypress)
{
DrawScreen(screen,h++);
while(SDL_PollEvent(&event))
{
switch (event.type)
{
case SDL_QUIT:
keypress = 1;
break;
case SDL_KEYDOWN:
keypress = 1;
break;
}
}
}
SDL_Quit();
return 0;
}
Posted: Mon Dec 22, 2008 9:06 am
by J.F.
Okay, thanks for the tip!
Posted: Mon Dec 22, 2008 5:55 pm
by J.F.
Okay... the above doesn't work for me. It compiles without error, but I can't seem to get it to run successfully from ule off a memstick. I just get a blank screen. How are you running it? What irx's do you include, and where?
Posted: Mon Dec 22, 2008 7:14 pm
by protomank
Well, I am not loading any IRX on the code, and just compiled SDL by myselft after the toolchain without any modified options, it is a very vanilla install of the SDK on a Ubuntu 8.10 machine.
Anyway, I run it from a USB pendrive using uLaunchELF
Posted: Mon Dec 22, 2008 7:43 pm
by J.F.
I didn't think any irxs were needed... it just doesn't work for me. Never has. Nothing I've compiled that uses SDL for the PS2 has ever worked. Everything else does... the libito examples seem to work fine. It's just SDL that causes trouble. No errors - it simply doesn't work.
:(