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view docs/man3/SDL_PushEvent.3 @ 689:5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
From: Stephane Marchesin
Subject: Re: [SDL] [patch] MMX alpha blit patches with MMX detection
I think everything is correct now. I've done as much testing as I could,
but some real-world testing wouldn't hurt, I think.
The patch is here : http://icps.u-strasbg.fr/~marchesin/sdl_mmxblit.patch
If you do byte-by-byte comparison of the output between C and MMX
functions, you'll notice that the results for 555 and 565 RGB alpha
blits aren't exactly the same. This is because MMX functions for 555 and
565 RGB have an higher accuracy. If you want the exact same behaviour
that's possible by masking the three lower alpha bits in the MMX
functions. Just ask !
I removed one MMX function because after I fixed it to match its C
equivalent, it revealed to be slower than the C version on a PIII
(although a bit faster on an Athlon XP).
I've also added MMX and PIII replacements for SDL_memcpy. Those provide
some speed up in testvidinfo -benchmark (at least for me, under linux &
X11).
author | Sam Lantinga <slouken@libsdl.org> |
---|---|
date | Fri, 22 Aug 2003 05:51:19 +0000 (2003-08-22) |
parents | e5bc29de3f0a |
children | 546f7c1eb755 |
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.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