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Fixed bug #61 Date: Mon, 24 Feb 2003 13:35:11 +0800 From: "Leonidas" Subject: [SDL] Re: Trigger mouse wheel event -- not in X-environment I have looked into the codes for the IMPS/2 mouse wheel mode of fbcon driver. But I found something weird. Here's the original codes to set a mouse device into IMPS/2 mode in libSDL. In the file src/video/fbcon/SDL_fbevents.c In function static int set_imps2_mode(int fd) ... Uint8 set_imps2[] = {0xf3, 200, 0xf3, 100, 0xf3, 80}; Uint8 reset = 0xff; fd_set fdset; struct timeval tv; int retval = 0; // Set mouse device fd into IMPS/2 mode if ( write(fd, &set_imps2, sizeof(set_imps2)) == sizeof(set_imps2) ) { // ??? then RESET it..??? if (write(fd, &reset, sizeof (reset)) == sizeof (reset) ) { retval = 1; } } ........... Since it sets IMPS/2 mode then reset it, so you will never get a mouse into IMPS/2 mode to use its wheel. What I did to make the wheel usable is remove the RESET codes. .... if ( write(fd, &set_imps2, sizeof(set_imps2)) == sizeof(set_imps2) ) { /* if (write(fd, &reset, sizeof (reset)) == sizeof (reset) ) { } */ retval = 1; } .... And in FB_OpenMouse(_THIS) Make the device /dev/psaux to be setted into imps2 mode such that it can be detected its a imps/2 mouse or not. (my mouse device is on ps2, but the codes only set /dev/input/mice device originally) Then I have done, I can use the mouse wheel when SDL uses frame buff driver. I dont exactly know I did right or wrong, I just change it for my usuage. Correct me please, if I did something wrong. Best regards, Li Tsung Lin IAP Product Dept. Engineer EeRise Corp. (Image Processing System, Computer Vision System) Hsin Tien, Taipei Hsien, Taiwan, R.O.C.
author Sam Lantinga <slouken@libsdl.org>
date Wed, 22 Mar 2006 07:22:40 +0000
parents 355632dca928
children
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<HTML
><HEAD
><TITLE
>SDL_LoadWAV</TITLE
><META
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><H1
><A
NAME="SDLLOADWAV"
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>SDL_LoadWAV</H1
><DIV
CLASS="REFNAMEDIV"
><A
NAME="AEN6816"
></A
><H2
>Name</H2
>SDL_LoadWAV&nbsp;--&nbsp;Load a WAVE file</DIV
><DIV
CLASS="REFSYNOPSISDIV"
><A
NAME="AEN6819"
></A
><H2
>Synopsis</H2
><DIV
CLASS="FUNCSYNOPSIS"
><A
NAME="AEN6820"
></A
><P
></P
><PRE
CLASS="FUNCSYNOPSISINFO"
>#include "SDL.h"</PRE
><P
><CODE
><CODE
CLASS="FUNCDEF"
>SDL_AudioSpec *<B
CLASS="FSFUNC"
>SDL_LoadWAV</B
></CODE
>(const char *file, SDL_AudioSpec *spec, Uint8 **audio_buf, Uint32 *audio_len);</CODE
></P
><P
></P
></DIV
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN6826"
></A
><H2
>Description</H2
><P
><TT
CLASS="FUNCTION"
>SDL_LoadWAV</TT
>
This function loads a WAVE <TT
CLASS="PARAMETER"
><I
>file</I
></TT
> into memory.</P
><P
>If this function succeeds, it returns the given 
<A
HREF="sdlaudiospec.html"
><TT
CLASS="FUNCTION"
>SDL_AudioSpec</TT
></A
>, 
filled with the audio data format of the wave data, and sets 
<TT
CLASS="PARAMETER"
><I
>audio_buf</I
></TT
> to a <TT
CLASS="FUNCTION"
>malloc</TT
>'d 
buffer containing the audio data, and sets <TT
CLASS="PARAMETER"
><I
>audio_len</I
></TT
> 
to the length of that audio buffer, in bytes.  You need to free the audio 
buffer with <A
HREF="sdlfreewav.html"
><TT
CLASS="FUNCTION"
>SDL_FreeWAV</TT
></A
> when you are
done with it.</P
><P
>This function returns <TT
CLASS="LITERAL"
>NULL</TT
> and sets the SDL 
error message if the wave file cannot be opened, uses an unknown data format, 
or is corrupt.  Currently raw, MS-ADPCM and IMA-ADPCM WAVE files are supported.</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN6841"
></A
><H2
>Example</H2
><PRE
CLASS="PROGRAMLISTING"
>SDL_AudioSpec wav_spec;
Uint32 wav_length;
Uint8 *wav_buffer;

/* Load the WAV */
if( SDL_LoadWAV("test.wav", &#38;wav_spec, &#38;wav_buffer, &#38;wav_length) == NULL ){
  fprintf(stderr, "Could not open test.wav: %s\n", SDL_GetError());
  exit(-1);
}
.
.
.
/* Do stuff with the WAV */
.
.
/* Free It */
SDL_FreeWAV(wav_buffer);</PRE
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN6844"
></A
><H2
>See Also</H2
><P
><A
HREF="sdlaudiospec.html"
><SPAN
CLASS="STRUCTNAME"
>SDL_AudioSpec</SPAN
></A
>,
<A
HREF="sdlopenaudio.html"
><TT
CLASS="FUNCTION"
>SDL_OpenAudio</TT
></A
>,
<A
HREF="sdlfreewav.html"
><TT
CLASS="FUNCTION"
>SDL_FreeWAV</TT
></A
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