Mercurial > sdl-ios-xcode
annotate docs/man3/SDL_PollEvent.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_PollEvent" "3" "Tue 11 Sep 2001, 22:59" "SDL" "SDL API Reference" |
| 0 | 2 .SH "NAME" |
| 3 SDL_PollEvent\- Polls for currently pending events\&. | |
| 4 .SH "SYNOPSIS" | |
| 5 .PP | |
| 6 \fB#include "SDL\&.h" | |
| 7 .sp | |
| 8 \fBint \fBSDL_PollEvent\fP\fR(\fBSDL_Event *event\fR); | |
| 9 .SH "DESCRIPTION" | |
| 10 .PP | |
| 11 Polls for currently pending events, and returns \fB1\fR if there are any pending events, or \fB0\fR if there are none available\&. | |
| 12 .PP | |
| 13 If \fBevent\fR is not \fBNULL\fP, the next event is removed from the queue and stored in that area\&. | |
| 14 .SH "EXAMPLES" | |
| 15 .PP | |
| 16 .PP | |
| 17 .nf | |
| 18 \f(CWSDL_Event event; /* Event structure */ | |
| 19 | |
| 20 \&. | |
| 21 \&. | |
| 22 \&. | |
| 23 /* Check for events */ | |
| 24 while(SDL_PollEvent(&event)){ /* Loop until there are no events left on the queue */ | |
| 25 switch(event\&.type){ /* Process the appropiate event type */ | |
| 26 case SDL_KEYDOWN: /* Handle a KEYDOWN event */ | |
| 27 printf("Oh! Key press | |
| 28 "); | |
| 29 break; | |
| 30 case SDL_MOUSEMOTION: | |
| 31 \&. | |
| 32 \&. | |
| 33 \&. | |
| 34 default: /* Report an unhandled event */ | |
| 35 printf("I don\&'t know what this event is! | |
| 36 "); | |
| 37 } | |
| 38 }\fR | |
| 39 .fi | |
| 40 .PP | |
| 41 .SH "SEE ALSO" | |
| 42 .PP | |
| 43 \fI\fBSDL_Event\fR\fR, \fI\fBSDL_WaitEvent\fP\fR, \fI\fBSDL_PeepEvents\fP\fR | |
|
181
e5bc29de3f0a
Updated from the SDL Documentation Project
Sam Lantinga <slouken@libsdl.org>
parents:
55
diff
changeset
|
44 ...\" created by instant / docbook-to-man, Tue 11 Sep 2001, 22:59 |