Mirai's Miscellaneous Misadventures
M52 / engines / sdl.c
1#include <stdlib.h>
5#include <SDL2/SDL.h>
6#include "../mimimi.h"
7static SDL_Texture *mimimi_sdl2_texture(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 SDL_Texture *texture;
17 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 for (x = 0 ; x < image->width ; x++)
24 for (y = 0 ; y < image->height ; y++)
25 {
26 offset = x * 4 + y * surface->pitch;
27 pixel = (Uint32 *) ((char *) surface->pixels + offset);
28
29 color = image->colors[x + y * image->width];
30 if (color == 0)
31 {
32 *pixel = 0;
33 }
34 else if (color < 0x10)
35 {
36 a = color * 0x11;
37 *pixel = (0xFFL << 24) | (a << 16) | (a << 8) | (a << 0);
38 }
39 else
40 {
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 texture = SDL_CreateTextureFromSurface(renderer, surface);
51
52 SDL_FreeSurface(surface);
53
54 return texture;
55}
56void mimimi_main(void (*tick)(void *data, struct mimimi_output *output, struct mimimi_input *input), void *data)
58{
59 struct mimimi_input input;
60 struct mimimi_output output;
61 SDL_Window *window;
62 SDL_Renderer *renderer;
63 Uint32 past, current, delay;
64 SDL_Event event;
65 unsigned char *keys;
66 SDL_Texture *texture;
67
68 atexit(&SDL_Quit);
69 SDL_Init(SDL_INIT_VIDEO);
70
71 input.size.width = 1024;
72 input.size.height = 512;
73
74 SDL_CreateWindowAndRenderer(input.size.width, input.size.height, SDL_WINDOW_RESIZABLE, &window, &renderer);
75 SDL_SetWindowTitle(window, "Mirai's Miscellaneous Misadventures");
76
77 SDL_RenderSetLogicalSize(renderer, input.size.width, input.size.height);
78
79 past = SDL_GetTicks();
80
81 for (;;)
82 {
83 keys = (void *) SDL_GetKeyboardState(NULL);
84 SDL_GetWindowSize(window, &input.size.width, &input.size.height);
85 input.left = keys[SDL_SCANCODE_LEFT];
86 input.right = keys[SDL_SCANCODE_RIGHT];
87 (*tick)(data, &output, &input);
88
89 SDL_RenderSetLogicalSize(renderer, output.image.width, output.image.height);
90 texture = mimimi_sdl2_texture(renderer, &output.image);
91 SDL_RenderCopy(renderer, texture, NULL, NULL);
92 SDL_RenderPresent(renderer);
93
94 current = SDL_GetTicks();
95 delay = current - past;
96 past = current;
97 if (delay < 33) SDL_Delay(33 - delay);
98
99 while (SDL_PollEvent(&event))
100 {
101 if (event.type == SDL_QUIT) exit(0);
102 if (event.type == SDL_KEYDOWN && event.key.keysym.sym == SDLK_q) exit(0);
103 }
104 }
105}