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egl: Check for a NULL pointer in SDL_EGL_GetProcAddress. 

This happens on kmsdrm if you try to GetProcAddress before creating
a window.

Fixes #5399.
This commit is contained in:
Ryan C. Gordon 2022-11-15 13:57:01 -05:00
parent f3cc99fb93
commit 44d7b8b91d
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GPG Key ID: FA148B892AB48044
1 changed files with 19 additions and 18 deletions
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37
src/video/SDL_egl.c
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@ -244,27 +244,28 @@ SDL_bool SDL_EGL_HasExtension(_THIS, SDL_EGL_ExtensionType type, const char *ext
void *
SDL_EGL_GetProcAddress(_THIS, const char *proc)
{
const Uint32 eglver = (((Uint32) _this->egl_data->egl_version_major) << 16) | ((Uint32) _this->egl_data->egl_version_minor);
const SDL_bool is_egl_15_or_later = eglver >= ((((Uint32) 1) << 16) | 5);
void *retval = NULL;
if (_this->egl_data != NULL) {
const Uint32 eglver = (((Uint32) _this->egl_data->egl_version_major) << 16) | ((Uint32) _this->egl_data->egl_version_minor);
const SDL_bool is_egl_15_or_later = eglver >= ((((Uint32) 1) << 16) | 5);
/* EGL 1.5 can use eglGetProcAddress() for any symbol. 1.4 and earlier can't use it for core entry points. */
if (!retval && is_egl_15_or_later && _this->egl_data->eglGetProcAddress) {
retval = _this->egl_data->eglGetProcAddress(proc);
/* EGL 1.5 can use eglGetProcAddress() for any symbol. 1.4 and earlier can't use it for core entry points. */
if (!retval && is_egl_15_or_later && _this->egl_data->eglGetProcAddress) {
retval = _this->egl_data->eglGetProcAddress(proc);
}
#if !defined(__EMSCRIPTEN__) && !defined(SDL_VIDEO_DRIVER_VITA) /* LoadFunction isn't needed on Emscripten and will call dlsym(), causing other problems. */
/* Try SDL_LoadFunction() first for EGL <= 1.4, or as a fallback for >= 1.5. */
if (!retval) {
retval = SDL_LoadFunction(_this->egl_data->opengl_dll_handle, proc);
}
#endif
/* Try eglGetProcAddress if we're on <= 1.4 and still searching... */
if (!retval && !is_egl_15_or_later && _this->egl_data->eglGetProcAddress) {
retval = _this->egl_data->eglGetProcAddress(proc);
}
}
#if !defined(__EMSCRIPTEN__) && !defined(SDL_VIDEO_DRIVER_VITA) /* LoadFunction isn't needed on Emscripten and will call dlsym(), causing other problems. */
/* Try SDL_LoadFunction() first for EGL <= 1.4, or as a fallback for >= 1.5. */
if (!retval) {
retval = SDL_LoadFunction(_this->egl_data->opengl_dll_handle, proc);
}
#endif
/* Try eglGetProcAddress if we're on <= 1.4 and still searching... */
if (!retval && !is_egl_15_or_later && _this->egl_data->eglGetProcAddress) {
retval = _this->egl_data->eglGetProcAddress(proc);
}
return retval;
}