MainLoop* main_loop = NULL;
MainLoop::MainLoop()
- : speed(1.0), nextpop(false), nextpush(false)
+ : speed(1.0), nextpop(false), nextpush(false), fps(0), screenshot_requested(false)
{
using namespace Scripting;
TimeScheduler::instance = new TimeScheduler();
this->speed = speed;
}
+float
+MainLoop::get_speed() const
+{
+ return speed;
+}
+
void
MainLoop::draw_fps(DrawingContext& context, float fps_fps)
{
char str[60];
snprintf(str, sizeof(str), "%3.1f", fps_fps);
const char* fpstext = "FPS";
- context.draw_text(white_text, fpstext, Vector(SCREEN_WIDTH - white_text->get_text_width(fpstext) - gold_text->get_text_width(" 99999") - BORDER_X, BORDER_Y + 20), LEFT_ALLIGN, LAYER_HUD);
- context.draw_text(gold_text, str, Vector(SCREEN_WIDTH - BORDER_X, BORDER_Y + 20), RIGHT_ALLIGN, LAYER_HUD);
+ context.draw_text(white_text, fpstext, Vector(SCREEN_WIDTH - white_text->get_text_width(fpstext) - gold_text->get_text_width(" 99999") - BORDER_X, BORDER_Y + 20), ALIGN_LEFT, LAYER_HUD);
+ context.draw_text(gold_text, str, Vector(SCREEN_WIDTH - BORDER_X, BORDER_Y + 20), ALIGN_RIGHT, LAYER_HUD);
}
void
if(config->show_fps)
draw_fps(context, fps);
+ // if a screenshot was requested, pass request on to drawing_context
+ if (screenshot_requested) {
+ context.take_screenshot();
+ screenshot_requested = false;
+ }
context.do_drawing();
/* Calculate frames per second */
Menu::current()->event(event);
if(event.type == SDL_QUIT)
quit();
+ else if (event.type == SDL_KEYDOWN && event.key.keysym.sym == SDLK_F11) {
+ config->use_fullscreen = !config->use_fullscreen;
+ init_video();
+ }
+ else if (event.type == SDL_KEYDOWN && event.key.keysym.sym == SDLK_PRINT) {
+ take_screenshot();
+ }
}
}
}
void
-MainLoop::run()
+MainLoop::run(DrawingContext &context)
{
- DrawingContext context;
-
Uint32 last_ticks = 0;
Uint32 elapsed_ticks = 0;
- int skipped_frames = 0;
running = true;
while(running) {
elapsed_ticks += ticks - last_ticks;
last_ticks = ticks;
- /* time for a new logical frame? */
- if(elapsed_ticks > TICKS_PER_FRAME) {
- elapsed_ticks -= TICKS_PER_FRAME;
- float timestep = 1.0 / LOGICAL_FPS;
- real_time += timestep;
- timestep *= speed;
- game_time += timestep;
-
- process_events();
- update_gamelogic(timestep);
+ if (elapsed_ticks > TICKS_PER_FRAME*4) {
+ // when the game loads up or levels are switched the
+ // elapsed_ticks grows extremly large, so we just ignore those
+ // large time jumps
+ elapsed_ticks = 0;
}
- if(elapsed_ticks > TICKS_PER_FRAME) {
- // too much time passed since last frame, the computer doesn't seem to be
- // able to draw 64fps on screen, so skip 1 frame for now
- skipped_frames++;
+ int frames = 0;
- // slow down the game if we skip too many frames
- if(skipped_frames > MAX_FRAME_SKIP) {
- elapsed_ticks = elapsed_ticks % TICKS_PER_FRAME;
- draw(context);
- skipped_frames = 0;
+ if (elapsed_ticks > TICKS_PER_FRAME) {
+ while(elapsed_ticks > TICKS_PER_FRAME && frames < MAX_FRAME_SKIP) {
+ elapsed_ticks -= TICKS_PER_FRAME;
+ float timestep = 1.0 / LOGICAL_FPS;
+ real_time += timestep;
+ timestep *= speed;
+ game_time += timestep;
+
+ process_events();
+ update_gamelogic(timestep);
+ frames += 1;
}
- } else {
+
draw(context);
- skipped_frames = 0;
}
sound_manager->update();
+
+ SDL_Delay(0);
}
}
+
+void
+MainLoop::take_screenshot()
+{
+ screenshot_requested = true;
+}
+