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[Add] Pause game when window is not focused. Introduced a small 10ms delay when paused to lower CPU usage.

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This commit is contained in:
Allanis 2013-02-19 11:37:38 +00:00
parent f66f644411
commit 74211a0825
1 changed files with 11 additions and 0 deletions
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11
src/main.c
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@ -148,6 +148,15 @@ int main(int argc, char** argv) {
while(SDL_PollEvent(&event)) { while(SDL_PollEvent(&event)) {
if(event.type == SDL_QUIT) quit = 1; // Handle quit. if(event.type == SDL_QUIT) quit = 1; // Handle quit.
// Pause the game if it is unfocused.
if(event.type == SDL_ACTIVEEVENT) {
if(event.active.state != SDL_APPMOUSEFOCUS) {
// We don't need the mouse focus.
if((event.active.gain == 0) && !paused) pause();
else if((event.active.gain == 1) && paused) unpause();
}
}
input_handle(&event); // handles all the events the player keybinds. input_handle(&event); // handles all the events the player keybinds.
} }
@ -193,6 +202,8 @@ static void fps_control(void) {
dt = (double)(SDL_GetTicks() - gtime) / 1000.; dt = (double)(SDL_GetTicks() - gtime) / 1000.;
gtime = SDL_GetTicks(); gtime = SDL_GetTicks();
if(paused) SDL_Delay(10); // Drop paused FPS to be nice to the CPU.
// If the fps is limited.. // If the fps is limited..
if((max_fps != 0) && (dt < 1./max_fps)) { if((max_fps != 0) && (dt < 1./max_fps)) {
double delay = 1./max_fps - dt; double delay = 1./max_fps - dt;