Initial Commit

main.c

@@ -0,0 +1,127 @@
+#include "debug.h"
+#include "game.h"
+#include "input.h"
+#include "render.h"
+#include <SDL3/SDL.h>
+#include <SDL3/SDL_error.h>
+#include <SDL3/SDL_events.h>
+#include <SDL3/SDL_init.h>
+#include <SDL3/SDL_keycode.h>
+#include <SDL3/SDL_oldnames.h>
+#include <SDL3/SDL_rect.h>
+#include <SDL3/SDL_render.h>
+#include <SDL3/SDL_stdinc.h>
+#include <SDL3/SDL_surface.h>
+#include <SDL3/SDL_timer.h>
+#include <SDL3/SDL_video.h>
+#include <SDL3/SDL_main.h>
+#include <stdint.h>
+#include <stdio.h>
+
+#define TARGET_FPS 60
+#define TARGET_FPS_MS (1000 / (TARGET_FPS))
+
+#define FALL_SPEED_NORMAL 500 // 500 ms
+#define FALL_SPEED_FAST 50
+
+int fall_speed = FALL_SPEED_NORMAL;
+int last_fall = 0;
+
+int update(Uint64 delta) {
+
+	input_update();
+
+	if (input_once(ACTION_QUIT)) {
+		return -1;
+	}
+
+	if (!game_is_done()) {
+		last_fall += delta;
+
+		if (input_once(ACTION_ROTATE)) {
+			game_rotate_shape();
+		}
+
+		fall_speed = FALL_SPEED_NORMAL;
+		if (input_repeat(ACTION_MOVE_LEFT)) {
+			game_move_shape(-1);
+		} else if (input_repeat(ACTION_MOVE_RIGHT)) {
+			game_move_shape(1);
+		} else if (input_repeat(ACTION_DROP)) {
+			fall_speed = FALL_SPEED_FAST;
+		}
+
+		if (last_fall >= fall_speed) {
+			// Keep leftover time to avoid drift when delta is larger than one tick.
+			last_fall -= fall_speed;
+			game_move_shape_down();
+		}
+	} 
+
+	return 0;
+}
+
+void render() {
+	if (game_is_done()) {
+		render_game_over_text();
+	} else {
+		render_clear();
+		game_render();
+	}
+	render_present();
+}
+
+void loop() {
+	Uint64 last_frame = 0;
+
+	for (;;) {
+		Uint64 frame_time, current_time = SDL_GetTicks();
+
+		if (update(current_time - last_frame) < 0) {
+			break;
+		}
+		render();
+
+		frame_time = SDL_GetTicks() - current_time;
+
+		// Generates to much noise, enable if you need it.
+		// debug_printf("frame time: %li, delay: %li\n", frame_time, (TARGET_FPS_MS - frame_time));
+
+		if (frame_time < TARGET_FPS_MS) {
+			SDL_Delay(TARGET_FPS_MS - frame_time);
+		}
+		last_frame = current_time;
+	}
+}
+
+int main(int argc, char** argv) {
+	SDL_Window* window;
+	SDL_Renderer *renderer;
+
+	if (!SDL_Init(SDL_INIT_VIDEO)) {
+		fprintf(stderr, "Failed to initalize SDL: %s\n", SDL_GetError());
+		return 1;
+	}
+
+	window = SDL_CreateWindow("Tetris", 800, 800, 0);
+
+	if (!window) {
+		fprintf(stderr, "Failed to create window: %s\n", SDL_GetError());
+		return 1;
+	}
+
+	if (!render_init(window)) {
+		fprintf(stderr, "Failed to initalize renderer: %s\n", SDL_GetError());
+		return 1;
+	}
+
+	game_init();
+
+	loop();
+
+	render_shutdown();
+
+	SDL_DestroyWindow(window);
+	SDL_Quit();
+	return 0;
+}