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/*
** pixel.c for in /home/gayot_o/prog/lib/sdl-digit
**
** Made by olivier gayot
** Login <gayot_o@epitech.net>
**
** Started on Mon Apr 23 08:13:46 2012 olivier gayot
** Last update Mon Apr 23 08:13:46 2012 olivier gayot
*/
#include "sdl_digit.h"
void set_pixel_color(SDL_Surface *surf,
int x, int y, Uint32 color) {
char *address = surf->pixels;
union_ cast_;
if (x >= surf->w || y >= surf->h || x < 0 || y < 0)
return;
address += surf->pitch * y;
address += x * surf->format->BytesPerPixel;
switch (surf->format->BitsPerPixel) {
case 32:
cast_.int_ = (Uint32 *)address;
*cast_.int_ = color;
break;
case 24:
cast_.int_ = (Uint32 *)address;
*cast_.int_ = color;
break;
case 16:
cast_.short_ = (Uint16 *)address;
*cast_.short_ = color;
break;
case 8:
cast_.char_ = (Uint8 *)address;
*cast_.char_ = color;
break;
default:
return;
break;
}
}
Uint32 get_pixel_color(SDL_Surface *surf, int x, int y) {
char *address = surf->pixels;
if (x >= surf->w || y >= surf->h || x < 0 || y < 0)
return 0;
address += surf->pitch * y;
address += x * surf->format->BytesPerPixel;
switch (surf->format->BitsPerPixel) {
case 32:
return ((Uint32)*((Uint32 *)address));
break;
case 24:
return ((Uint32)*((Uint32 *)address));
break;
case 16:
return ((Uint32)*((Uint16 *)address));
break;
case 8:
return ((Uint32)*((Uint8 *)address));
break;
default:
return ((Uint32)0);
break;
}
}
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