Add FPS counter to SDL title
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parent
629550c30b
commit
2c58e669ef
GPG Key ID:
F71D56A3151C4FB3
161
SDL/main.c
161
SDL/main.c
@ -7,6 +7,17 @@
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#include "gui.h"
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#include "shader.h"
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#define str(x) #x
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#define xstr(x) str(x)
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#define title "SameBoy v" xstr(VERSION)
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#define FRAME_VALUES 300 // reduce to get averages above shorter time periods
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Uint32 frametimes[FRAME_VALUES];
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Uint32 frametime_last;
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Uint32 frame_count;
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float frames_per_second;
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float fps_min;
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float fps_max;
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#ifndef _WIN32
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#define AUDIO_FREQUENCY 96000
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@ -42,6 +53,51 @@ static const GB_model_t sdl_to_internal_model[] =
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[MODEL_AGB] = GB_MODEL_AGB
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};
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void fps_init() {
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// Set all frame times to 0ms.
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memset(frametimes, 0, sizeof(frametimes));
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frame_count = 0;
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frames_per_second = 0;
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fps_max = 0;
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fps_min = FLT_MAX;
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frametime_last = SDL_GetTicks();
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}
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/* Source: http://sdl.beuc.net/sdl.wiki/SDL_Average_FPS_Measurement */
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void fps_update() {
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Uint32 frametimes_index;
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Uint32 get_ticks;
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Uint32 count;
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Uint32 i;
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frametimes_index = frame_count % FRAME_VALUES;
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get_ticks = SDL_GetTicks();
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frametimes[frametimes_index] = get_ticks - frametime_last;
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frametime_last = get_ticks;
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frame_count++;
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if (frame_count < FRAME_VALUES) {
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count = frame_count;
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} else {
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count = FRAME_VALUES;
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}
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frames_per_second = 0;
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for (i = 0; i < count; i++) {
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frames_per_second += frametimes[i];
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}
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frames_per_second /= count;
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frames_per_second = 1000.f / frames_per_second;
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if (frames_per_second < fps_min) fps_min = frames_per_second;
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if (frames_per_second > fps_max) fps_max = frames_per_second;
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char title_buffer[50];
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snprintf(title_buffer, sizeof(title_buffer), title " - %.1f FPS (%.1f - %.1f)", frames_per_second, fps_min, fps_max);
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SDL_SetWindowTitle(window, title_buffer);
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}
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void set_filename(const char *new_filename, bool new_should_free)
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{
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if (filename && should_free_filename) {
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@ -120,20 +176,20 @@ static void handle_events(GB_gameboy_t *gb)
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case SDL_QUIT:
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pending_command = GB_SDL_QUIT_COMMAND;
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break;
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case SDL_DROPFILE: {
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set_filename(event.drop.file, true);
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pending_command = GB_SDL_NEW_FILE_COMMAND;
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break;
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}
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case SDL_WINDOWEVENT: {
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if (event.window.event == SDL_WINDOWEVENT_RESIZED) {
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update_viewport();
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}
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break;
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}
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case SDL_JOYBUTTONUP:
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case SDL_JOYBUTTONDOWN: {
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joypad_button_t button = get_joypad_button(event.jbutton.button);
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@ -159,7 +215,7 @@ static void handle_events(GB_gameboy_t *gb)
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}
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}
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break;
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case SDL_JOYAXISMOTION: {
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static bool axis_active[2] = {false, false};
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joypad_axis_t axis = get_joypad_axis(event.jaxis.axis);
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@ -207,14 +263,14 @@ static void handle_events(GB_gameboy_t *gb)
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value == SDL_HAT_LEFTUP || value == SDL_HAT_UP || value == SDL_HAT_RIGHTUP ? -1 : (value == SDL_HAT_LEFTDOWN || value == SDL_HAT_DOWN || value == SDL_HAT_RIGHTDOWN ? 1 : 0);
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int8_t leftright =
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value == SDL_HAT_LEFTUP || value == SDL_HAT_LEFT || value == SDL_HAT_LEFTDOWN ? -1 : (value == SDL_HAT_RIGHTUP || value == SDL_HAT_RIGHT || value == SDL_HAT_RIGHTDOWN ? 1 : 0);
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GB_set_key_state(gb, GB_KEY_LEFT, leftright == -1);
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GB_set_key_state(gb, GB_KEY_RIGHT, leftright == 1);
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GB_set_key_state(gb, GB_KEY_UP, updown == -1);
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GB_set_key_state(gb, GB_KEY_DOWN, updown == 1);
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break;
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};
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case SDL_KEYDOWN:
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switch (event.key.keysym.scancode) {
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case SDL_SCANCODE_ESCAPE: {
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@ -224,22 +280,21 @@ static void handle_events(GB_gameboy_t *gb)
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case SDL_SCANCODE_C:
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if (event.type == SDL_KEYDOWN && (event.key.keysym.mod & KMOD_CTRL)) {
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GB_debugger_break(gb);
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}
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break;
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case SDL_SCANCODE_R:
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if (event.key.keysym.mod & MODIFIER) {
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pending_command = GB_SDL_RESET_COMMAND;
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}
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break;
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case SDL_SCANCODE_P:
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if (event.key.keysym.mod & MODIFIER) {
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paused = !paused;
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}
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break;
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case SDL_SCANCODE_M:
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if (event.key.keysym.mod & MODIFIER) {
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#ifdef __APPLE__
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@ -257,24 +312,30 @@ static void handle_events(GB_gameboy_t *gb)
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}
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}
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break;
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case SDL_SCANCODE_F:
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if (event.key.keysym.mod & MODIFIER) {
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if ((SDL_GetWindowFlags(window) & SDL_WINDOW_FULLSCREEN_DESKTOP) == false) {
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SDL_SetWindowFullscreen(window, SDL_WINDOW_FULLSCREEN_DESKTOP);
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}
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else {
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else {
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SDL_SetWindowFullscreen(window, 0);
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}
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}
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break;
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case SDL_SCANCODE_L:
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if (event.key.keysym.mod & MODIFIER) {
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fps_init();
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}
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break;
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default:
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/* Save states */
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if (event.key.keysym.scancode >= SDL_SCANCODE_1 && event.key.keysym.scancode <= SDL_SCANCODE_0) {
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if (event.key.keysym.mod & MODIFIER) {
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command_parameter = (event.key.keysym.scancode - SDL_SCANCODE_1 + 1) % 10;
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if (event.key.keysym.mod & KMOD_SHIFT) {
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pending_command = GB_SDL_LOAD_STATE_COMMAND;
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}
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@ -324,6 +385,7 @@ static void vblank(GB_gameboy_t *gb)
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clock_mutliplier += 0.1;
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GB_set_clock_multiplier(gb, clock_mutliplier);
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}
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if (configuration.blend_frames) {
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render_texture(active_pixel_buffer, previous_pixel_buffer);
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uint32_t *temp = active_pixel_buffer;
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@ -334,6 +396,9 @@ static void vblank(GB_gameboy_t *gb)
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else {
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render_texture(active_pixel_buffer, NULL);
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}
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fps_update();
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do_rewind = rewind_down;
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handle_events(gb);
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}
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@ -365,7 +430,7 @@ static void audio_callback(void *gb, Uint8 *stream, int len)
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memset(stream, 0, len);
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}
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}
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static bool handle_pending_command(void)
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{
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switch (pending_command) {
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@ -375,7 +440,7 @@ static bool handle_pending_command(void)
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char save_extension[] = ".s0";
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save_extension[2] += command_parameter;
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replace_extension(filename, strlen(filename), save_path, save_extension);
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start_capturing_logs();
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if (pending_command == GB_SDL_LOAD_STATE_COMMAND) {
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GB_load_state(&gb, save_path);
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@ -386,17 +451,17 @@ static bool handle_pending_command(void)
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end_capturing_logs(true, false);
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return false;
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}
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case GB_SDL_RESET_COMMAND:
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GB_save_battery(&gb, battery_save_path_ptr);
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return true;
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case GB_SDL_NO_COMMAND:
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return false;
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case GB_SDL_NEW_FILE_COMMAND:
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return true;
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case GB_SDL_QUIT_COMMAND:
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GB_save_battery(&gb, battery_save_path_ptr);
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exit(0);
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@ -413,7 +478,7 @@ restart:
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}
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else {
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GB_init(&gb, sdl_to_internal_model[configuration.model]);
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GB_set_vblank_callback(&gb, (GB_vblank_callback_t) vblank);
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GB_set_pixels_output(&gb, active_pixel_buffer);
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GB_set_rgb_encode_callback(&gb, rgb_encode);
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@ -422,32 +487,34 @@ restart:
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GB_set_highpass_filter_mode(&gb, configuration.highpass_mode);
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GB_set_rewind_length(&gb, configuration.rewind_length);
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}
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bool error = false;
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start_capturing_logs();
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const char * const boot_roms[] = {"dmg_boot.bin", "cgb_boot.bin", "agb_boot.bin"};
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error = GB_load_boot_rom(&gb, executable_relative_path(boot_roms[configuration.model]));
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end_capturing_logs(true, error);
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start_capturing_logs();
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error = GB_load_rom(&gb, filename);
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end_capturing_logs(true, error);
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size_t path_length = strlen(filename);
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/* Configure battery */
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char battery_save_path[path_length + 5]; /* At the worst case, size is strlen(path) + 4 bytes for .sav + NULL */
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replace_extension(filename, path_length, battery_save_path, ".sav");
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battery_save_path_ptr = battery_save_path;
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GB_load_battery(&gb, battery_save_path);
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/* Configure symbols */
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GB_debugger_load_symbol_file(&gb, executable_relative_path("registers.sym"));
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char symbols_path[path_length + 5];
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replace_extension(filename, path_length, symbols_path, ".sym");
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GB_debugger_load_symbol_file(&gb, symbols_path);
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fps_init();
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/* Run emulation */
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while (true) {
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if (paused || rewind_paused) {
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@ -467,7 +534,7 @@ restart:
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}
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GB_run(&gb);
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}
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/* These commands can't run in the handle_event function, because they're not safe in a vblank context. */
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if (handle_pending_command()) {
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pending_command = GB_SDL_NO_COMMAND;
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@ -490,15 +557,13 @@ static void save_configuration(void)
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int main(int argc, char **argv)
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{
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#define str(x) #x
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#define xstr(x) str(x)
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fprintf(stderr, "SameBoy v" xstr(VERSION) "\n");
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fprintf(stderr, title "\n");
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if (argc > 2) {
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fprintf(stderr, "Usage: %s [rom]\n", argv[0]);
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exit(1);
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}
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if (argc == 2) {
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filename = argv[1];
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}
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@ -506,26 +571,26 @@ int main(int argc, char **argv)
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signal(SIGINT, debugger_interrupt);
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SDL_Init(SDL_INIT_EVERYTHING);
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SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 3);
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SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 2);
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SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_CORE);
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window = SDL_CreateWindow("SameBoy v" xstr(VERSION), SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED,
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window = SDL_CreateWindow(title, SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED,
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160 * 2, 144 * 2, SDL_WINDOW_OPENGL | SDL_WINDOW_RESIZABLE | SDL_WINDOW_ALLOW_HIGHDPI);
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SDL_SetWindowMinimumSize(window, 160, 144);
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SDL_GLContext gl_context = SDL_GL_CreateContext(window);
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GLint major = 0, minor = 0;
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glGetIntegerv(GL_MAJOR_VERSION, &major);
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glGetIntegerv(GL_MINOR_VERSION, &minor);
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if (major * 0x100 + minor < 0x302) {
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SDL_GL_DeleteContext(gl_context);
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gl_context = NULL;
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}
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if (gl_context == NULL) {
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renderer = SDL_CreateRenderer(window, -1, 0);
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texture = SDL_CreateTexture(renderer, SDL_GetWindowPixelFormat(window), SDL_TEXTUREACCESS_STREAMING, 160, 144);
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@ -534,15 +599,15 @@ int main(int argc, char **argv)
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else {
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pixel_format = SDL_AllocFormat(SDL_PIXELFORMAT_ABGR8888);
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}
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/* Configure Audio */
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memset(&want_aspec, 0, sizeof(want_aspec));
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want_aspec.freq = AUDIO_FREQUENCY;
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want_aspec.format = AUDIO_S16SYS;
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want_aspec.channels = 2;
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#if SDL_COMPILEDVERSION >= 2005 && defined(__APPLE__)
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/* SDL 2.0.5 on macOS introduced a bug where certain combinations of buffer lengths and frequencies
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/* SDL 2.0.5 on macOS introduced a bug where certain combinations of buffer lengths and frequencies
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fail to produce audio correctly. */
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want_aspec.samples = 2048;
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#else
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@ -564,15 +629,15 @@ int main(int argc, char **argv)
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want_aspec.callback = audio_callback;
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want_aspec.userdata = &gb;
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device_id = SDL_OpenAudioDevice(0, 0, &want_aspec, &have_aspec, SDL_AUDIO_ALLOW_FREQUENCY_CHANGE);
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/* Start Audio */
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SDL_EventState(SDL_DROPFILE, SDL_ENABLE);
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char *prefs_dir = SDL_GetPrefPath("", "SameBoy");
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snprintf(prefs_path, sizeof(prefs_path) - 1, "%sprefs.bin", prefs_dir);
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SDL_free(prefs_dir);
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FILE *prefs_file = fopen(prefs_path, "rb");
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if (prefs_file) {
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fread(&configuration, 1, sizeof(configuration), prefs_file);
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@ -581,14 +646,14 @@ int main(int argc, char **argv)
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if (configuration.model >= MODEL_MAX) {
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configuration.model = MODEL_CGB;
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}
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atexit(save_configuration);
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if (!init_shader_with_name(&shader, configuration.filter)) {
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init_shader_with_name(&shader, "NearestNeighbor");
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}
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update_viewport();
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if (filename == NULL) {
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run_gui(false);
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}
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