Mercurial > sdl-ios-xcode
annotate docs/man3/SDL_PeepEvents.3 @ 1543:98f9b16f565c
From: "Alex Volkov"
Date: Thu, 10 Nov 2005 21:53:40 -0500
Subject: [SDL] BUG[?]: 32bpp RGBA->RGB colorkey blit, no SDL_SRCALPHA
It seems there is either a documentation vs. reality mismatch or a real bug
in SDL_blit_N.c:BlitNtoNKey().
The exact blit in question is a 32bpp RGBA->RGB, where RGBA has SDL_COLORKEY
and *no* SDL_SRCALPHA flags. The doc in SDL_video.h states:
* RGBA->RGB:
* SDL_SRCALPHA not set:
* copy RGB.
* if SDL_SRCCOLORKEY set, only copy the pixels matching the
* RGB values of the source colour key, ignoring alpha in the
* comparison.
BlitNtoNKey(), however, forgets to "ignore alpha in the comparison". The
documentation makes perfect sense, so I think it is the code that is faulty.
The attached patch corrects the code.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Wed, 15 Mar 2006 15:43:15 +0000 |
| parents | e5bc29de3f0a |
| children | 546f7c1eb755 |
| rev | line source |
|---|---|
|
181
e5bc29de3f0a
Updated from the SDL Documentation Project
Sam Lantinga <slouken@libsdl.org>
parents:
55
diff
changeset
|
1 .TH "SDL_PeepEvents" "3" "Tue 11 Sep 2001, 22:59" "SDL" "SDL API Reference" |
| 0 | 2 .SH "NAME" |
| 3 SDL_PeepEvents\- Checks the event queue for messages and optionally returns them\&. | |
| 4 .SH "SYNOPSIS" | |
| 5 .PP | |
| 6 \fB#include "SDL\&.h" | |
| 7 .sp | |
| 8 \fBint \fBSDL_PeepEvents\fP\fR(\fBSDL_Event *events, int numevents, SDL_eventaction action, Uint32 mask\fR); | |
| 9 .SH "DESCRIPTION" | |
| 10 .PP | |
| 11 Checks the event queue for messages and optionally returns them\&. | |
| 12 .PP | |
| 13 If \fBaction\fR is \fBSDL_ADDEVENT\fP, up to \fBnumevents\fR events will be added to the back of the event queue\&. | |
| 14 .PP | |
| 15 If \fBaction\fR is \fBSDL_PEEKEVENT\fP, up to \fBnumevents\fR events at the front of the event queue, matching \fI\fBmask\fR\fR, will be returned and will not be removed from the queue\&. | |
| 16 .PP | |
| 17 If \fBaction\fR is \fBSDL_GETEVENT\fP, up to \fBnumevents\fR events at the front of the event queue, matching \fI\fBmask\fR\fR, will be returned and will be removed from the queue\&. | |
| 18 .PP | |
| 19 This function is thread-safe\&. | |
| 20 .SH "RETURN VALUE" | |
| 21 .PP | |
| 22 This function returns the number of events actually stored, or \fB-1\fR if there was an error\&. | |
| 23 .SH "SEE ALSO" | |
| 24 .PP | |
| 25 \fI\fBSDL_Event\fR\fR, \fI\fBSDL_PollEvent\fP\fR, \fI\fBSDL_PushEvent\fP\fR | |
|
181
e5bc29de3f0a
Updated from the SDL Documentation Project
Sam Lantinga <slouken@libsdl.org>
parents:
55
diff
changeset
|
26 ...\" created by instant / docbook-to-man, Tue 11 Sep 2001, 22:59 |