#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <SDL/SDL.h>
#include <emscripten.h>
SDL_Surface *screen;
void renderloop(void) {
SDL_Event event;
SDL_Rect dst;
SDL_LockSurface(screen);
for(int n=0;n<1000;n++) {
int x=random()%800;
int y=random()%600;
int pixel=random()*100000;
int bpp = screen->format->BytesPerPixel;
Uint8 *p = (Uint8 *)screen->pixels + y * screen->pitch + x * bpp;
if((x>screen->w)||(y>screen->h)||(x<0)||(y<0)) return;
*(Uint32 *)p = pixel;
}
SDL_UnlockSurface(screen);
SDL_UpdateRect(screen, 0,0,0,0);
while(SDL_PollEvent(&event))
if(event.type==SDL_KEYDOWN) emscripten_cancel_main_loop();
}
int main(int argc, char *argv[]) {
SDL_Init(SDL_INIT_VIDEO);
screen=SDL_SetVideoMode(800,600,32,SDL_ANYFORMAT);
printf("in loop\n");
emscripten_set_main_loop(renderloop,0,1);
printf("out loop\n");
return 0;
}
ok, you run it and press any key to exit the loop. When the loop stops it
doesn't call "printf("out loop\n");" :(
On Sunday, August 26, 2018 at 12:59:49 PM UTC-5, Alon Zakai wrote:
>
> I don't think that should matter (it just affects what happens in the
> initial call to set the main loop). But let us know if you find a testcase
> showing that, perhaps there's a bug.
>
> On Sun, Aug 26, 2018 at 8:15 AM sigflup synasloble <[email protected]
> <javascript:>> wrote:
>
>> Maybe it's because I have the simulate infinite loop argument on
>>
>>
>> On Sunday, August 26, 2018 at 8:49:00 AM UTC-5, Alon Zakai wrote:
>>>
>>> This should work, and looks like we have a passing test for it,
>>> browser.test_emscripten_main_loop, so I think there might be something more
>>> going on in your application. Can you provide a testcase showing the issue?
>>>
>>> On Fri, Aug 24, 2018 at 5:36 PM sigflup synasloble <[email protected]>
>>> wrote:
>>>
>>>> I want to exit main loop by calling cancel_main_loop inside of the
>>>> loop.
>>>>
>>>> When I do this my program hangs :(
>>>>
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