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Fixed bug #457

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Don't crash if passed a NULL overlay.  The app crashes anyway, since
it's not checking the return value of the create call, but at least it's
not crashing in SDL anymore. :)

--HG--
branch : SDL-1.2
This commit is contained in:
Sam Lantinga 2007-07-15 21:50:07 +00:00
parent 85e0b92fab
commit b3ed797912
1 changed files with 18 additions and 5 deletions
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23
src/video/SDL_yuv.c
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@ -65,11 +65,18 @@ SDL_Overlay *SDL_CreateYUVOverlay(int w, int h, Uint32 format,
int SDL_LockYUVOverlay(SDL_Overlay *overlay)
{
if ( overlay == NULL ) {
SDL_SetError("Passed NULL overlay");
return -1;
}
return overlay->hwfuncs->Lock(current_video, overlay);
}
void SDL_UnlockYUVOverlay(SDL_Overlay *overlay)
{
if ( overlay == NULL ) {
return;
}
overlay->hwfuncs->Unlock(current_video, overlay);
}
@ -79,6 +86,11 @@ int SDL_DisplayYUVOverlay(SDL_Overlay *overlay, SDL_Rect *dstrect)
int srcx, srcy, srcw, srch;
int dstx, dsty, dstw, dsth;
if ( overlay == NULL || dstrect == NULL ) {
SDL_SetError("Passed NULL overlay or dstrect");
return -1;
}
/* Clip the rectangle to the screen area */
srcx = 0;
srcy = 0;
@ -128,10 +140,11 @@ int SDL_DisplayYUVOverlay(SDL_Overlay *overlay, SDL_Rect *dstrect)
void SDL_FreeYUVOverlay(SDL_Overlay *overlay)
{
if ( overlay ) {
if ( overlay->hwfuncs ) {
overlay->hwfuncs->FreeHW(current_video, overlay);
}
SDL_free(overlay);
if ( overlay == NULL ) {
return;
}
if ( overlay->hwfuncs ) {
overlay->hwfuncs->FreeHW(current_video, overlay);
}
SDL_free(overlay);
}