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[KMSDRM] Better error handling: no more segfaults on window creation failure.

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This commit is contained in:
vanfanel 2021-03-19 04:25:40 +01:00 committed by Sam Lantinga
parent 4acd1dcad4
commit cf7eef37b0
2 changed files with 38 additions and 41 deletions
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13
src/video/kmsdrm/SDL_kmsdrmmouse.c
View file

@ -477,17 +477,8 @@ KMSDRM_InitMouse(_THIS, SDL_VideoDisplay *display)
mouse->WarpMouse = KMSDRM_WarpMouse;
mouse->WarpMouseGlobal = KMSDRM_WarpMouseGlobal;
/* SDL expects to set the default cursor of the display when we init the mouse,
but since we have moved the KMSDRM_InitMouse() call to KMSDRM_CreateWindow(),
we end up calling KMSDRM_InitMouse() every time we create a window, so we
have to prevent this from being done every time a new window is created.
If we don't, new default cursors would stack up on mouse->cursors and SDL
would have to hide and delete them at quit, not to mention the memory leak... */
if(dispdata->set_default_cursor_pending) {
SDL_SetDefaultCursor(KMSDRM_CreateDefaultCursor());
dispdata->set_default_cursor_pending = SDL_FALSE;
}
SDL_SetDefaultCursor(KMSDRM_CreateDefaultCursor());
dispdata->set_default_cursor_pending = SDL_FALSE;
}
void

66
src/video/kmsdrm/SDL_kmsdrmvideo.c
View file

@ -535,9 +535,9 @@ void KMSDRM_AddDisplay (_THIS, drmModeConnector *connector, drmModeRes *resource
dispdata->modeset_pending = SDL_FALSE;
dispdata->cursor_bo = NULL;
/* Since we create and show the default cursor on KMSDRM_InitMouse() and
we call KMSDRM_InitMouse() everytime we create a new window, we have
to be sure to create and show the default cursor only the first time.
/* Since we create and show the default cursor on KMSDRM_InitMouse(),
and we call KMSDRM_InitMouse() when we create a window, we have to know
if the display used by the window already has a default cursor or not.
If we don't, new default cursors would stack up on mouse->cursors and SDL
would have to hide and delete them at quit, not to mention the memory leak... */
dispdata->set_default_cursor_pending = SDL_TRUE;
@ -1087,8 +1087,12 @@ KMSDRM_DestroyWindow(_THIS, SDL_Window *window)
/* Destroy GBM surface and buffers. */
KMSDRM_DestroySurfaces(_this, window);
/* Unload library and deinit GBM, but only if this is the last remaining window.*/
if ((viddata->num_windows - 1) == 0) {
/* Unload library and deinit GBM, but only if this is the last window.
Note that this is the right comparision because num_windows could be 1
if there is a complete window, or 0 if we got here from SDL_CreateWindow()
because KMSDRM_CreateWindow() returned an error so the window wasn't
added to the windows list. */
if (viddata->num_windows <= 1) {
/* Unload EGL/GL library and free egl_data. */
if (_this->egl_data) {
@ -1152,8 +1156,7 @@ KMSDRM_CreateWindow(_THIS, SDL_Window * window)
/* Allocate window internal data */
windata = (SDL_WindowData *)SDL_calloc(1, sizeof(SDL_WindowData));
if (!windata) {
ret = SDL_OutOfMemory();
goto cleanup;
return(SDL_OutOfMemory());
}
/* Setup driver data for this window */
@ -1185,25 +1188,30 @@ KMSDRM_CreateWindow(_THIS, SDL_Window * window)
but only when we come here for the first time,
and only if it's not a VK window. */
if ((ret = KMSDRM_GBMInit(_this, dispdata))) {
goto cleanup;
return (SDL_SetError("Can't init GBM on window creation."));
}
}
/* Manually load the GL library. KMSDRM_EGL_LoadLibrary() has already
been called by SDL_CreateWindow() but we don't do anything there,
out KMSDRM_EGL_LoadLibrary() is a dummy precisely to be able to load it here.
If we let SDL_CreateWindow() load the lib, it would be loaded
before we call KMSDRM_GBMInit(), causing all GLES programs to fail. */
if (!_this->egl_data) {
egl_display = (NativeDisplayType)((SDL_VideoData *)_this->driverdata)->gbm_dev;
if (SDL_EGL_LoadLibrary(_this, NULL, egl_display, EGL_PLATFORM_GBM_MESA)) {
goto cleanup;
}
/* Manually load the GL library. KMSDRM_EGL_LoadLibrary() has already
been called by SDL_CreateWindow() but we don't do anything there,
out KMSDRM_EGL_LoadLibrary() is a dummy precisely to be able to load it here.
If we let SDL_CreateWindow() load the lib, it would be loaded
before we call KMSDRM_GBMInit(), causing all GLES programs to fail. */
if (!_this->egl_data) {
egl_display = (NativeDisplayType)((SDL_VideoData *)_this->driverdata)->gbm_dev;
if (SDL_EGL_LoadLibrary(_this, NULL, egl_display, EGL_PLATFORM_GBM_MESA)) {
return (SDL_SetError("Can't load EGL/GL library on window creation."));
}
_this->gl_config.driver_loaded = 1;
_this->gl_config.driver_loaded = 1;
}
}
/* Create the cursor BO for the display of this window,
/* Init the cursor stuff for the window display, but ONLY if we haven't done so
on this display before. */
if (!dispdata->set_default_cursor_pending) {
/* Create the cursor BO for the display of this window,
now that we know this is not a VK window. */
KMSDRM_CreateCursorBO(display);
@ -1217,6 +1225,8 @@ KMSDRM_CreateWindow(_THIS, SDL_Window * window)
destruction/creation cycles. So we must manually re-show the
visible cursors, if necessary, when we create a window. */
KMSDRM_InitCursor();
dispdata->set_default_cursor_pending = SDL_TRUE;
}
/* The FULLSCREEN flags are cut out from window->flags at this point,
@ -1244,7 +1254,7 @@ KMSDRM_CreateWindow(_THIS, SDL_Window * window)
/* Create the window surfaces with the size we have just chosen.
Needs the window diverdata in place. */
if ((ret = KMSDRM_CreateSurfaces(_this, window))) {
goto cleanup;
return (SDL_SetError("Can't window GBM/EGL surfaces on window creation."));
}
/* Tell app about the size we have determined for the window,
@ -1264,8 +1274,7 @@ KMSDRM_CreateWindow(_THIS, SDL_Window * window)
viddata->max_windows = new_max_windows;
if (!viddata->windows) {
ret = SDL_OutOfMemory();
goto cleanup;
return (SDL_OutOfMemory());
}
}
@ -1278,12 +1287,9 @@ KMSDRM_CreateWindow(_THIS, SDL_Window * window)
SDL_SetMouseFocus(window);
SDL_SetKeyboardFocus(window);
cleanup:
if (ret) {
/* Allocated windata will be freed in KMSDRM_DestroyWindow */
KMSDRM_DestroyWindow(_this, window);
}
/* Allocated windata will be freed in KMSDRM_DestroyWindow,
and KMSDRM_DestroyWindow() will be called by SDL_CreateWindow()
if we return error on any of the previous returns of the function. */
return ret;
}