Created
November 22, 2010 14:58
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SDL_Test.c
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/* Found at http://friedspace.com/SDLTest.c */ | |
#include <stdio.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; | |
} | |
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