SDL2: SDL_Delay() makes the window bar hidden on El Capitan

SDL Development
#1

Env:
SDL 2.0.4;
OS X El Capitan 10.11.5 (15F34);
clang 7.3

After calling the SDL_Delay(), the window bar is hidden and a white bar is shown instead.
I’m not sure if this is a feature or bug. Or I missed something?

Thank you!

Here is my code:

Code:

#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <SDL2/SDL.h>

const int SCREEN_WIDTH = 640;
const int SCREEN_HEIGHT = 480;

int main(int argc, const char argv[])
{
if( SDL_Init( SDL_INIT_VIDEO ) < 0 )
{
printf( “SDL could not initialize! SDL_Error: %s\n”, SDL_GetError() );
}
bool quit = false;
SDL_Event event;
SDL_Window window = NULL;
window = SDL_CreateWindow(“Test SDL”, SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, SCREEN_WIDTH, SCREEN_HEIGHT, SDL_WINDOW_SHOWN);
SDL_Renderer * renderer = SDL_CreateRenderer(window, -1, SDL_RENDERER_ACCELERATED);

SDL_SetRenderDrawColor(renderer, 255, 254, 255, 255 );
SDL_RenderClear(renderer);

SDL_RenderPresent(renderer);
SDL_Delay(5000); // window bar is hidden, a white blank bar is shown instead.

while (!quit) // window bar is shown right now.
{
SDL_WaitEvent(&event);
switch (event.type)
{
case SDL_QUIT:
quit = true;
break;
}
}

SDL_DestroyRenderer(renderer);
SDL_DestroyWindow(window);

SDL_Quit();

return 0;
}

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#2

I have the exact same problem! And I saw it reported on a number of other websites. There are also other variants of this issue, almost all on OS X El Capitan.
Does someone here know whether it is a (un)known bug or a normal behaviour inherent to the OS X platform? I???m curious about this. Thank you very much :smiley:

#3

Hey, I don’t know if you figured this out (it’s been a while since this post was made), but the issue is that the message pump isn’t getting drained.

Previous versions of SDL2 / OS X seemed to handle this differently.

Code:

// replace this:
SDL_Delay(1000);

// with this:
for (int i = 0; i < 1000; ++i)
{
SDL_PumpEvents();
SDL_Delay(1);
}

I know it’s a lame work around, but it fixes the issue of the white / hidden window bar.