1 files changed, 104 insertions, 0 deletions
diff --git a/src/graphics.c b/src/graphics.c
new file mode 100644
index 0000000..2c5ef7e
--- /dev/null
+++ b/src/graphics.c
@@ -0,0 +1,104 @@
+#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;
+		}
+	}
+}