#include "game/level/platforms.h"
#include "game/level/player.h"
#include "game/sound_samples.h"
+#include "game/sprite_font.h"
#include "math/minmax.h"
#include "math/point.h"
+#include "sdl/renderer.h"
#include "system/error.h"
#include "system/lt.h"
+#include "system/lt/lt_adapters.h"
#define SCREEN_WIDTH 800
#define SCREEN_HEIGHT 600
-#define GAME_FPS 60
-
-/* LT module adapter for Mix_CloseAudio */
-static void Mix_CloseAudio_lt(void* ignored)
-{
- (void) ignored;
- Mix_CloseAudio();
-}
-
-/* LT module adapter for SDL_Quit */
-static void SDL_Quit_lt(void* ignored)
-{
- (void) ignored;
- SDL_Quit();
-}
static void print_usage(FILE *stream)
{
- fprintf(stream, "Usage: nothing <level-file>\n");
+ fprintf(stream, "Usage: nothing [--fps <fps>] <level-file>\n");
}
int main(int argc, char *argv[])
{
srand((unsigned int) time(NULL));
- lt_t *const lt = create_lt();
+ Lt *const lt = create_lt();
+
+ char *level_filename = NULL;
+ int fps = 30;
+
+ for (int i = 1; i < argc;) {
+ if (strcmp(argv[i], "--fps") == 0) {
+ if (i + 1 < argc) {
+ if (sscanf(argv[i + 1], "%d", &fps) == 0) {
+ fprintf(stderr, "Cannot parse FPS: %s is not a number\n", argv[i + 1]);
+ print_usage(stderr);
+ RETURN_LT(lt, -1);
+ }
+ i += 2;
+ } else {
+ fprintf(stderr, "Value of FPS is not provided\n");
+ print_usage(stderr);
+ RETURN_LT(lt, -1);
+ }
+ } else {
+ level_filename = argv[i];
+ i++;
+ }
+ }
- if (argc < 2) {
+ if (level_filename == NULL) {
+ fprintf(stderr, "Path to level file is not provided\n");
print_usage(stderr);
RETURN_LT(lt, -1);
}
};
const size_t sound_sample_files_count = sizeof(sound_sample_files) / sizeof(char*);
- game_t *const game = PUSH_LT(
+ Game *const game = PUSH_LT(
lt,
create_game(
- argv[1],
+ level_filename,
sound_sample_files,
sound_sample_files_count,
renderer),
const Uint8 *const keyboard_state = SDL_GetKeyboardState(NULL);
SDL_Event e;
- int64_t last_time = (int64_t) SDL_GetTicks();
- const int64_t expected_delay_ms = (int64_t) (1000.0f / GAME_FPS);
+ const int64_t delta_time = (int64_t) roundf(1000.0f / 60.0f);
+ int64_t render_timer = (int64_t) roundf(1000.0f / (float) fps);
while (!game_over_check(game)) {
- const int64_t current_time = (int64_t) SDL_GetTicks();
-
- if (current_time == last_time) {
- SDL_Delay((int) expected_delay_ms);
- last_time = current_time;
- continue;
- }
-
- const int64_t actual_delta_ms = current_time - last_time;
-
+ const int64_t begin_frame_time = (int64_t) SDL_GetTicks();
while (!game_over_check(game) && SDL_PollEvent(&e)) {
if (game_event(game, &e) < 0) {
RETURN_LT(lt, -1);
}
- if (game_render(game) < 0) {
- print_current_error_msg("Failed rendering the game");
+ if (game_update(game, (float) delta_time * 0.001f) < 0) {
+ print_current_error_msg("Failed handling updating");
RETURN_LT(lt, -1);
}
- int64_t effective_delta_ms = max_int64(actual_delta_ms, expected_delay_ms);
- while (effective_delta_ms > 0) {
- if (game_update(game, (float) min_int64(expected_delay_ms, effective_delta_ms) * 0.001f) < 0) {
- print_current_error_msg("Failed handling updating");
- RETURN_LT(lt, -1);
- }
-
- effective_delta_ms -= expected_delay_ms;
- }
-
if (game_sound(game) < 0) {
print_current_error_msg("Failed handling the sound");
RETURN_LT(lt, -1);
}
- SDL_Delay((unsigned int) max_int64(0, expected_delay_ms - actual_delta_ms));
- last_time = current_time;
+ render_timer -= delta_time;
+ if (render_timer <= 0) {
+ if (game_render(game) < 0) {
+ print_current_error_msg("Failed rendering the game");
+ RETURN_LT(lt, -1);
+ }
+ SDL_RenderPresent(renderer);
+ render_timer = (int64_t) roundf(1000.0f / (float) fps);
+ }
+
+ const int64_t end_frame_time = (int64_t) SDL_GetTicks();
+
+ SDL_Delay((unsigned int) max_int64(10, delta_time - (end_frame_time - begin_frame_time)));
}
RETURN_LT(lt, 0);