Mercurial > sdl-ios-xcode
view docs/man3/SDL_AudioCVT.3 @ 4393:9afe12fb4c41 SDL-1.2
Fixed bug #901
Tim Angus 2009-12-11 11:45:46 PST
Disable mouse event generation when state is not SDL_APPMOUSEFOCUS
If a Windows SDL application is minimised by using alt-tab, SDL_APPMOUSEFOCUS
is lost as part of the minimisation. Unfortunately, the directx driver doesn't
pay any attention to this state when generating mouse button events, so
clicking on the Desktop can cause mouse clicks in the SDL application, while
it's still minimised. The attached patch fixes this. It looks much more
complicated than it actually is due to indentation; here it is ignoring
whitespace:
tma@abraxas:~/sources/SDL-1.2-svn$ svn diff -x -b
Index: src/video/windx5/SDL_dx5events.c
===================================================================
--- src/video/windx5/SDL_dx5events.c (revision 5376)
+++ src/video/windx5/SDL_dx5events.c (working copy)
@@ -374,10 +374,9 @@
if ( !(SDL_GetAppState() & SDL_APPMOUSEFOCUS) ) {
mouse_lost = 1;
ClipCursor(NULL);
- }
-
+ } else {
/* If the mouse was lost, regain some sense of mouse state */
- if ( mouse_lost && (SDL_GetAppState() & SDL_APPMOUSEFOCUS) ) {
+ if ( mouse_lost ) {
POINT mouse_pos;
Uint8 old_state;
Uint8 new_state;
@@ -548,6 +547,7 @@
if ( xrel || yrel ) {
post_mouse_motion(1, xrel, yrel);
}
+ }
}
/* The main Win32 event handler */
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Mon, 14 Dec 2009 22:41:31 +0000 |
| parents | 1238da4a7112 |
| children |
line wrap: on
line source
.TH "SDL_AudioCVT" "3" "Tue 11 Sep 2001, 22:58" "SDL" "SDL API Reference" .SH "NAME" SDL_AudioCVT \- Audio Conversion Structure .SH "STRUCTURE DEFINITION" .PP .nf \f(CWtypedef struct{ int needed; Uint16 src_format; Uint16 dest_format; double rate_incr; Uint8 *buf; int len; int len_cvt; int len_mult; double len_ratio; void (*filters[10])(struct SDL_AudioCVT *cvt, Uint16 format); int filter_index; } SDL_AudioCVT;\fR .fi .PP .SH "STRUCTURE DATA" .TP 20 \fBneeded\fR Set to one if the conversion is possible .TP 20 \fBsrc_format\fR Audio format of the source .TP 20 \fBdest_format\fR Audio format of the destination .TP 20 \fBrate_incr\fR Rate conversion increment .TP 20 \fBbuf\fR Audio buffer .TP 20 \fBlen\fR Length of the original audio buffer in bytes .TP 20 \fBlen_cvt\fR Length of converted audio buffer in bytes (calculated) .TP 20 \fBlen_mult\fR \fBbuf\fR must be \fBlen\fR*\fBlen_mult\fR bytes in size(calculated) .TP 20 \fBlen_ratio\fR Final audio size is \fBlen\fR*\fBlen_ratio\fR .TP 20 \fBfilters[10](\&.\&.)\fR Pointers to functions needed for this conversion .TP 20 \fBfilter_index\fR Current conversion function .SH "DESCRIPTION" .PP The \fBSDL_AudioCVT\fR is used to convert audio data between different formats\&. A \fBSDL_AudioCVT\fR structure is created with the \fI\fBSDL_BuildAudioCVT\fP\fR function, while the actual conversion is done by the \fI\fBSDL_ConvertAudio\fP\fR function\&. .PP Many of the fields in the \fBSDL_AudioCVT\fR structure should be considered private and their function will not be discussed here\&. .IP "\fBUint8 *\fP\fBbuf\fR" 10This points to the audio data that will be used in the conversion\&. It is both the source and the destination, which means the converted audio data overwrites the original data\&. It also means that the converted data may be larger than the original data (if you were converting from 8-bit to 16-bit, for instance), so you must ensure \fBbuf\fR is large enough\&. See below\&. .IP "\fBint\fP \fBlen\fR" 10This is the length of the original audio data in bytes\&. .IP "\fBint\fP \fBlen_mult\fR" 10As explained above, the audio buffer needs to be big enough to store the converted data, which may be bigger than the original audio data\&. The length of \fBbuf\fR should be \fBlen\fR*\fBlen_mult\fR\&. .IP "\fBdouble\fP \fBlen_ratio\fR" 10When you have finished converting your audio data, you need to know how much of your audio buffer is valid\&. \fBlen\fR*\fBlen_ratio\fR is the size of the converted audio data in bytes\&. This is very similar to \fBlen_mult\fR, however when the convert audio data is shorter than the original \fBlen_mult\fR would be 1\&. \fBlen_ratio\fR, on the other hand, would be a fractional number between 0 and 1\&. .SH "SEE ALSO" .PP \fI\fBSDL_BuildAudioCVT\fP\fR, \fI\fBSDL_ConvertAudio\fP\fR, \fI\fBSDL_AudioSpec\fR\fR .\" created by instant / docbook-to-man, Tue 11 Sep 2001, 22:58