SDL_SetWindowIcon not setting taskbar icon

SDL Development
1

I’m using SDL 2.32.8.0 and calling:

SDL_Surface* pIcon = IMG_Load("icon64.png");

if (pIcon != NULL)
{
	SDL_SetWindowIcon(g_Window, pIcon);

	SDL_FreeSurface(pIcon);
}

My icon is set in the top left of the window, but not in the taskbar. I think this used to work but at some point seems to have stopped working?

2

Are you using Wayland by any chance?

See SDL3/README-wayland - SDL Wiki

3

I tested SDL_SetWindowIcon() on Windows and Linux Mint with SDL 2.32.8 and it works.
But I am not using wayland.

4

I’m on Windows and using Visual Studio. My 64x64 .png icon appears in the window’s application icon at the top left, but not in the taskbar at the bottom of the screen.

5

I can reproduce the same issue but it seems that you forgot an event handling.
Here is a short example

void test_main(void) {

SDL_RWops* pSDLStreamPointer;
SDL_Surface *pSurface;
SDL_Window *pWindow = NULL;
SDL_Event Event;

if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_AUDIO | SDL_INIT_JOYSTICK | SDL_INIT_GAMECONTROLLER) == 0) {
    pWindow = SDL_CreateWindow("hello sdl2",50,50,640,480,0);
    if (pWindow != NULL) {
        pSDLStreamPointer = SDL_RWFromMem((void*)badsmile_bmp,sizeof(badsmile_bmp));
        if (pSDLStreamPointer != NULL) {
            pSurface = SDL_LoadBMP_RW(pSDLStreamPointer,1);    // Surface from Stream
            if (pSurface != NULL) {
                SDL_SetWindowIcon(pWindow,pSurface);

                while (1) {
		            // A little event handling :-)
                    while (SDL_PollEvent(&Event) != 0) {                    

                    }
                    SDL_Delay(100);
                }
            }
        }
    }
}

}
6

Can you post the PNG here (or privately email it to me, if you prefer: icculus@icculus.org) ? I don’t think any of this code has changed in a long time in SDL2, but I’ll take a look at it.

7

icon64

This is the png file, but I’m not sure that’s the problem as I get the same issue with all of my other games too.

I’m using:

SDL2 2.32.8.0
SDL2_image 2.8.8.0

8

As already mentioned, I only get the icon displayed in the upper left corner of the window if I remove the event handling.
Does your main loop handle events?

9

I get the icon displayed in the top left corner - that isn’t the problem! It doesn’t appear in the taskbar

10

Sorry my english is so bad::neutral_face:

  1. I get the icon displayed in the top left corner if I remove the event handling
  2. I get the icon displayed in the top left corner and in the taskbar if the event handling is in use.
11

Ah sorry, as soon as I posted I realised I’d misunderstood you! My code has a loop like this:

// loop
while (!bQuit)
{
	if (SDL_WaitEvent(&event))
	{
		switch (event.type)
		{
12

OK, I will try my code with SDL_WaitEvent(&event) instead of SDL_PollEvent(&event).

13

SDL_WaitEvent(&event) and SDL_PollEvent(&event) works both for me.

My code does not use SDL2_image. So my surface for the icon is generated from a bitmap.

14

OK, I’ve gone through the start up code in my game and commented things out and found that if I comment out just this line:

mixChunk = Mix_LoadWAV(szPathWithExtension);

the icon will appear in the taskbar.

Weird!

BTW I mostly load .ogg sound files and I have SDL_mixer 2.6.3.0

15

Calling SDL_SetWindowIcon after I have loaded all of my sound files fixes the issue and I now get the icon in the taskbar!

16

Something else strange I’ve noticed is if I set up a breakpoint in Visual Studio after calling SDL_SetWindowIcon but before the loop starts, and then get VS to continue, no taskbar icon appears.

It’s as if hitting a breakpoint, or loading a sound file, eats up the Windows message SDL_SetWindowIcon has added to the queue?

17

Oh, this sounds a little bit “dangerous”.I also installed the SDL mixer 2.6.3.0. However, it makes no difference for me whether I load the wav file before SDL_SetWindowIcon or after. It works both for me.
My test code:

void test_main(void) {
   SDL_RWops* pSDLStreamPointer;
   SDL_Surface *pSurface;
   SDL_Window *pWindow = NULL;
   SDL_Event Event;
   Mix_Chunk *mixChunk;
   const char * wavfile = “sound_nut.wav”;

if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_AUDIO | SDL_INIT_JOYSTICK | SDL_INIT_GAMECONTROLLER) == 0) {
    if (Mix_OpenAudio(44100,AUDIO_S16,2,8192) == 0) {
        SDL_Log("Mix_OpenAudio OK");
    } else {
        SDL_Log("Mix_OpenAudio Error: %s",SDL_GetError());
    }
    pWindow = SDL_CreateWindow("hello sdl2",50,50,640,480,0);
    if (pWindow != NULL) {
        pSDLStreamPointer = SDL_RWFromMem((void*)badsmile_bmp,sizeof(badsmile_bmp));
        if (pSDLStreamPointer != NULL) {
            pSurface = SDL_LoadBMP_RW(pSDLStreamPointer,1);  // Surface from Stream erzeugen
            if (pSurface != NULL) {
                SDL_SetWindowIcon(pWindow,pSurface);
                // Loading sound chunk after SDL_SetWindowIcon()
                mixChunk = Mix_LoadWAV(wavfile);
                if (mixChunk != NULL) {
                    SDL_Log("WAV Chunk OK");
                } else {
                    SDL_Log("Mix_LoadWAV failed, error: %s",SDL_GetError());
                }
                while (1) {
                    SDL_WaitEvent(&Event);
                    SDL_Log("an event: %u",SDL_GetTicks());
                }
            }
        }
    }
}

}
18

I noticed the taskbar icon wasn’t showing for my application, found this thread, and can confirm that initializing sdl_mixer and loading my audio files before setting the window icon works around the problem. I’m using SDL 3.2.20 and a recent version of SDL mixer.

19

Can you report an issue on GitHub?
New Issue

Please include a minimal example to demonstrate the problem and provide information about the version of OS you’re using.

Thanks!