Fixed bug #33 Mike Frysinger wrote: > with libsdl-1.2.9, some games (like bomberclone) started > segfaulting in Gentoo [...snip...] > the last change in the last hunk: [...snip...] > if i change the statement to read: > (table[which].blit_features & GetBlitFeatures()) == GetBlitFeatures() > bomberclone no longer segfaults on my box Alex Volkov wrote: > The test "(table[which].blit_features & GetBlitFeatures()) == > table[which].blit_features)" is correct, and the previous > "(table[which].cpu_mmx == SDL_HasMMX())" was actually broken. I think there is potentially a slightly different cause of the above problem. During the introduction of the Altivec code, the blit_table struct field 'alpha' got changed from a straightforward enum to a bitmask, which makes perfect sense by itself. However, now the table driven blitter selection code in SDL_CalculateBlitN() can choose the wrong blitters when searching for a NO_ALPHA blitter because of the following code: int a_need = 0; ... (a_need & table[which].alpha) == a_need && When searching through the normal_blit_2[] table, a SET_ALPHA blitter (like Blit_RGB565_ARGB8888) can now be selected instead of a NO_ALPHA one, causing alpha channel bits to appear in a non-alpha destination surface. I suppose this could theoretically be an indirect cause of the segfault mentioned above. I *think* this can be fixed by changing to int a_need = NO_ALPHA;

.TH "SDL_PushEvent" "3" "Tue 11 Sep 2001, 22:59" "SDL" "SDL API Reference" 
.SH "NAME"
SDL_PushEvent\- Pushes an event onto the event queue
.SH "SYNOPSIS"
.PP
\fB#include "SDL\&.h"
.sp
\fBint \fBSDL_PushEvent\fP\fR(\fBSDL_Event *event\fR);
.SH "DESCRIPTION"
.PP
The event queue can actually be used as a two way communication channel\&. Not only can events be read from the queue, but the user can also push their own events onto it\&. \fBevent\fR is a pointer to the event structure you wish to push onto the queue\&.
.PP
.RS
\fBNote:  
.PP
Pushing device input events onto the queue doesn\&'t modify the state of the device within SDL\&.
.RE
.SH "RETURN VALUE"
.PP
Returns \fB0\fR on success or \fB-1\fR if the event couldn\&'t be pushed\&.
.SH "EXAMPLES"
.PP
See \fI\fBSDL_Event\fR\fR\&.
.SH "SEE ALSO"
.PP
\fI\fBSDL_PollEvent\fP\fR, \fI\fBSDL_PeepEvents\fP\fR, \fI\fBSDL_Event\fR\fR
...\" created by instant / docbook-to-man, Tue 11 Sep 2001, 22:59