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#include "graphics.h"
#define WINDOW_TITLE "Cardioid"
static const char *g_sdl_error_str;
#ifdef CARDIOID_RELEASE
# define SDL_CALL(x) x
#else
# define SDL_CALL(x) \
SDL_ClearError(); \
x; \
g_sdl_error_str = SDL_GetError(); \
if (*g_sdl_error_str != '\0') { \
SDL_Log("[ERROR SDL] %s at %s:%d\n\t"#x, \
g_sdl_error_str, __FILE__, __LINE__); \
exit(EXIT_FAILURE); \
}
#endif
static void update(t_state *state);
static void event_handler(t_state *state);
static void draw_lines(t_state *state);
void graphics_init(t_state *state, int width, int height, t_cardioid *cardioid)
{
SDL_CALL(SDL_Init(SDL_INIT_VIDEO));
SDL_CALL(state->window = SDL_CreateWindow(
WINDOW_TITLE,
SDL_WINDOWPOS_UNDEFINED,
SDL_WINDOWPOS_UNDEFINED,
width,
height,
0
));
SDL_CALL(state->renderer = SDL_CreateRenderer(state->window, -1, 0));
state->cardioid = cardioid;
state->running = true;
}
void graphics_quit(t_state *state)
{
SDL_DestroyRenderer(state->renderer);
SDL_DestroyWindow(state->window);
SDL_Quit();
}
void graphics_run(t_state *state)
{
while (state->running)
{
event_handler(state);
update(state);
SDL_Delay(3);
}
}
static
void update(t_state *state)
{
SDL_CALL(SDL_SetRenderDrawColor(state->renderer, 0, 0, 0, 255));
SDL_CALL(SDL_RenderClear(state->renderer));
SDL_CALL(SDL_SetRenderDrawColor(state->renderer, 200, 150, 150, 255));
SDL_CALL(SDL_RenderDrawPoints(state->renderer, state->cardioid->points, state->cardioid->points_num));
draw_lines(state);
SDL_CALL(SDL_RenderPresent(state->renderer));
}
static
void draw_lines(t_state *state)
{
SDL_Point *points = state->cardioid->points;
SDL_Point *paired;
for (size_t i = 0; i < state->cardioid->points_num; i++)
{
paired = &points[i * 10 % state->cardioid->points_num];
SDL_CALL(SDL_RenderDrawLine(state->renderer, points[i].x, points[i].y, paired->x, paired->y));
}
}
static
void event_handler(t_state *state)
{
SDL_Event e;
while (SDL_PollEvent(&e))
{
switch (e.type)
{
case SDL_QUIT:
state->running = false;
break;
case SDL_KEYDOWN:
switch (e.key.keysym.sym)
{
case SDLK_j: CARDIOID_SUB_POINTS(state->cardioid, 3); break;
case SDLK_k: CARDIOID_ADD_POINTS(state->cardioid, 3); break;
}
break;
}
}
}
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