Mercurial > sdl-ios-xcode
view docs/man3/SDL_GetRelativeMouseState.3 @ 4168:69bcba65c388 SDL-1.2
Fixed bug #526
Comment #1 From Simon Howard 2009-03-20 16:50:56
Hi,
I'm the author of Chocolate Doom, one of the other source ports that James
mentioned. This is a patch against the current SVN version of SDL 1.2 that
fixes the bug. It has been tested and hopefully should be obviously correct
from examining the changes. I'll give a brief explanation.
When the palette is set with SDL_SetPalette, the IDirectDrawPalette_SetEntries
DirectX function is invoked. However, when this happens, a WM_PALETTECHANGED
message is sent to the window.
A WM_PALETTECHANGED message can also be received if the palette is changed for
some other reason, like if the system palette is changed. Therefore, the
palette change handler (DX5_PaletteChanged) has code to deal with this case.
It distinguishes "expected" palette changes (set with SDL_SetPalette) from
"unexpected" palette changes using the colorchange_expected variable, which is
set before calling IDirectDrawPalette_SetEntries. However, the code to set
this variable is missing in the fullscreen code path. By setting this
variable, the palette change is handled properly and the freezes go away.
author | Sam Lantinga <slouken@libsdl.org> |
---|---|
date | Mon, 13 Apr 2009 00:53:12 +0000 |
parents | 4e3b250c950e |
children | 1238da4a7112 |
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.TH "SDL_GetRelativeMouseState" "3" "Tue 11 Sep 2001, 22:59" "SDL" "SDL API Reference" .SH "NAME" SDL_GetRelativeMouseState \- Retrieve the current state of the mouse .SH "SYNOPSIS" .PP \fB#include "SDL\&.h" .sp \fBUint8 \fBSDL_GetRelativeMouseState\fP\fR(\fBint *x, int *y\fR); .SH "DESCRIPTION" .PP The current button state is returned as a button bitmask, which can be tested using the \fBSDL_BUTTON(X)\fP macros, and \fBx\fR and \fBy\fR are set to the change in the mouse position since the last call to \fBSDL_GetRelativeMouseState\fP or since event initialization\&. You can pass \fBNULL\fP for either \fBx\fR or \fBy\fR\&. .SH "SEE ALSO" .PP \fI\fBSDL_GetMouseState\fP\fR ...\" created by instant / docbook-to-man, Tue 11 Sep 2001, 22:59