Mirai's Miscellaneous Misadventures
M54 / engines / sdl.c
1#include <stdlib.h>
5#include <SDL2/SDL.h>
6#include "../mimimi.h"
7static struct SDL_Texture *mimimi_sdl2_texture(struct SDL_Renderer *renderer, struct mimimi_image *image)
9{
10 static unsigned char rch[] = {0x11, 0x44, 0x77, 0x99, 0xCC, 0xFF};
11 static unsigned char gch[] = {0x11, 0x33, 0x55, 0x77, 0x99, 0xBB, 0xDD, 0xFF};
12 static unsigned char bch[] = {0x22, 0x55, 0x88, 0xBB, 0xEE};
13
14 int x, y;
15 unsigned char color;
16 struct SDL_Texture * texture;
17 struct SDL_Surface * surface;
18 Uint32 offset;
19 Uint32 *pixel;
20 Uint32 r, g, b, a;
21
22 surface = SDL_CreateRGBSurface(0, image->width, image->height, 32, 0xFF0000, 0x00FF00, 0x0000FF, 0xFF000000L);
23
24 for (y = 0 ; y < image->height ; y++) {
25
26 for (x = 0 ; x < image->width ; x++) {
27
28 offset = x * 4 + y * surface->pitch;
29 pixel = (void *) ((char *) surface->pixels + offset);
30
31 color = image->colors[x + y * image->width];
32 if (color == 0) {
33 *pixel = 0;
34 }
35 else {
36 if (color < 0x10) {
37 a = color * 0x11;
38 *pixel = (0xFFL << 24) | (a << 16) | (a << 8) | (a << 0);
39 }
40 else {
41 color -= 0x10;
42 r = rch[(color / 40) % 6];
43 g = gch[(color / 5) % 8];
44 b = bch[(color / 1) % 5];
45 a = 0xFF;
46 *pixel = (a << 24) | (r << 16) | (g << 8) | (b << 0);
47 }
48 }
49 }
50 }
51
52 texture = SDL_CreateTextureFromSurface(renderer, surface);
53
54 SDL_FreeSurface(surface);
55
56 return texture;
57}
58void mimimi_main(void (*tick)(void *data, struct mimimi_input *input), void *data)
60{
61 struct mimimi_input input;
62 SDL_Window * window;
63 SDL_Renderer * renderer;
64 Uint32 tickno, now;
65 SDL_Event event;
66 unsigned char *keys;
67 SDL_Texture * texture;
68
69 atexit(&SDL_Quit);
70 SDL_Init(SDL_INIT_VIDEO);
71
72 input.image.width = 1024;
73 input.image.height = 512;
74
75 SDL_CreateWindowAndRenderer(input.image.width, input.image.height, SDL_WINDOW_RESIZABLE, &window, &renderer);
76 SDL_SetWindowTitle(window, "Mirai's Miscellaneous Misadventures");
77
78 tickno = 0;
79
80 for (;;) {
81
82 keys = (void *) SDL_GetKeyboardState(NULL);
83 SDL_GetWindowSize(window, &input.image.width, &input.image.height);
84 input.left = keys[SDL_SCANCODE_LEFT] || keys[SDL_SCANCODE_A];
85 input.right = keys[SDL_SCANCODE_RIGHT] || keys[SDL_SCANCODE_D];
86 (*tick)(data, &input);
87
88 SDL_RenderSetLogicalSize(renderer, input.image.width, input.image.height);
89 texture = mimimi_sdl2_texture(renderer, &input.image);
90 SDL_RenderCopy(renderer, texture, NULL, NULL);
91 SDL_DestroyTexture(texture);
92 SDL_RenderPresent(renderer);
93
94 now = SDL_GetTicks();
95 do tickno++;
96 while (tickno * 100 < now * 3) ;
97 SDL_Delay(tickno * 100.0 / 3 - now);
98
99 while (SDL_PollEvent(&event)) {
100 if (event.type == SDL_QUIT) exit(0);
101 if (event.type == SDL_KEYDOWN && event.key.keysym.sym == SDLK_q) exit(0);
102 }
103 }
104}