1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
|
#include <stdio.h>
#include <SDL/SDL.h>
#include <emscripten.h>
int main() {
SDL_Init(SDL_INIT_VIDEO);
SDL_Surface *screen = SDL_SetVideoMode(600, 400, 8, SDL_HWSURFACE | SDL_HWPALETTE);
//initialize sdl palette
//with red green and blue
//colors
SDL_Color pal[3];
pal[0].r = 255;
pal[0].g = 0;
pal[0].b = 0;
pal[0].unused = 0;
pal[1].r = 0;
pal[1].g = 255;
pal[1].b = 0;
pal[1].unused = 0;
pal[2].r = 0;
pal[2].g = 0;
pal[2].b = 255;
pal[2].unused = 0;
SDL_SetColors(screen, pal, 0, 3);
SDL_FillRect(screen, NULL, 0);
{
SDL_Rect rect = { 300, 0, 300, 200 };
SDL_FillRect(screen, &rect, 1);
}
{
SDL_Rect rect = { 0, 200, 600, 200 };
SDL_FillRect(screen, &rect, 2);
}
//changing green color
//to yellow
pal[1].r = 255;
SDL_SetColors(screen, pal, 1, 1);
{
SDL_Rect rect = { 300, 200, 300, 200 };
SDL_FillRect(screen, &rect, 1);
}
printf("you should see red, blue and yellow rectangles\n");
SDL_Quit();
return 0;
}
|
