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Fixed bug #46 Date: Fri, 13 Jan 2006 18:09:45 -0500 From: mhall4400 vipmail kvcc edu Subject: Possible SDL bug Greetings I believe Ive come across a bug in your SDL product (1.2.9), in the CD-ROM control portion of the library. When calling the SDL_CDPlay() function to play the last track of a CD using the offset and length from an SDL_CD structure generated by SDL_CDOpen(), I get the following error from a call to SDL_Error(): mciSendCommand() error: The specified parameter is out of range for the specified command. The code returning the error is: SDL_CDPlay(g_playingDriveSDLCD, g_playingDriveSDLCD->track[trackNumberInt].offset, g_playingDriveSDLCD->track[trackNumberInt].length) Subtracting one from the length of the provided length seems to repair the problem: SDL_CDPlay(g_playingDriveSDLCD, g_playingDriveSDLCD->track[trackNumberInt].offset, (g_playingDriveSDLCD->track[trackNumberInt].length) - 1) Ive replicated this problem on Windows 98 SE (several months since last patch), fully-patched Window ME, seldom-patched Windows XP SP1, and fully-patched Windows XP SP2. While investigating the issue, I came across a line in your librarys win32 source code in file \src\cdrom\win32\SDL_syscdrom.c (source code zip archive from your download page), function: SDL_SYS_CDGetTOC(), line 226 where you add 1 to the value for length to fix MCI last track length bug. This may be the source of the issue (because subtracting 1 from the length seems to resolve the issue). Microsoft may have patched the referenced bug since you wrote that line. Mike Hall
author Sam Lantinga <slouken@libsdl.org>
date Tue, 14 Mar 2006 05:34:39 +0000
parents 355632dca928
children
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>SDL_WM_GrabInput</H1
><DIV
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><A
NAME="AEN3663"
></A
><H2
>Name</H2
>SDL_WM_GrabInput&nbsp;--&nbsp;Grabs mouse and keyboard input.</DIV
><DIV
CLASS="REFSYNOPSISDIV"
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><H2
>Synopsis</H2
><DIV
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><P
></P
><PRE
CLASS="FUNCSYNOPSISINFO"
>#include "SDL.h"</PRE
><P
><CODE
><CODE
CLASS="FUNCDEF"
>SDL_GrabMode <B
CLASS="FSFUNC"
>SDL_WM_GrabInput</B
></CODE
>(SDL_GrabMode mode);</CODE
></P
><P
></P
></DIV
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><DIV
CLASS="REFSECT1"
><A
NAME="AEN3673"
></A
><H2
>Description</H2
><P
>Grabbing means that the mouse is confined to the application window,
and nearly all keyboard input is passed directly to the application,
and not interpreted by a window manager, if any.</P
><P
>When <TT
CLASS="PARAMETER"
><I
>mode</I
></TT
> is <TT
CLASS="LITERAL"
>SDL_GRAB_QUERY</TT
> the grab mode is not changed, but the current grab mode is returned.</P
><P
><PRE
CLASS="PROGRAMLISTING"
>typedef enum {
  SDL_GRAB_QUERY,
  SDL_GRAB_OFF,
  SDL_GRAB_ON
} SDL_GrabMode;</PRE
>
                    </P
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><H2
>Return Value</H2
><P
>The current/new <SPAN
CLASS="STRUCTNAME"
>SDL_GrabMode</SPAN
>.</P
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