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Date: Mon, 13 Dec 2004 21:28:18 -0500 From: Jonathan Atkins Subject: [SDL] SDL_SaveBMP width bugfix this fixes the pitch versus width difference that can happen (especially for 8bit and 24bit (with the exact RGBAmasks) surfaces) when you use SDL_SaveBMP. The problem was the pitch was used instead of the width, which in some cases is much wider than the screen area you really want to save...making for ugly crud on the saved image borders. This code has been tested with & without pitch overhangs...and with the right masks for 24 bit surfaces. I tested 8,15,16,24,32-0RGB,32-RGBA(with no SDL_SRCALPHA flag).
author Sam Lantinga <slouken@libsdl.org>
date Tue, 14 Dec 2004 06:20:49 +0000 (2004-12-14)
parents 355632dca928
children
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<HTML
><HEAD
><TITLE
>SDL_JoystickOpen</TITLE
><META
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><H1
><A
NAME="SDLJOYSTICKOPEN"
></A
>SDL_JoystickOpen</H1
><DIV
CLASS="REFNAMEDIV"
><A
NAME="AEN6096"
></A
><H2
>Name</H2
>SDL_JoystickOpen&nbsp;--&nbsp;Opens a joystick for use.</DIV
><DIV
CLASS="REFSYNOPSISDIV"
><A
NAME="AEN6099"
></A
><H2
>Synopsis</H2
><DIV
CLASS="FUNCSYNOPSIS"
><A
NAME="AEN6100"
></A
><P
></P
><PRE
CLASS="FUNCSYNOPSISINFO"
>#include "SDL.h"</PRE
><P
><CODE
><CODE
CLASS="FUNCDEF"
>SDL_Joystick *<B
CLASS="FSFUNC"
>SDL_JoystickOpen</B
></CODE
>(int index);</CODE
></P
><P
></P
></DIV
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN6106"
></A
><H2
>Description</H2
><P
>Opens a joystick for use within SDL. The <TT
CLASS="PARAMETER"
><I
>index</I
></TT
> refers to the N'th joystick in the system. A joystick must be opened before it game be used.</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN6110"
></A
><H2
>Return Value</H2
><P
>Returns a <SPAN
CLASS="STRUCTNAME"
>SDL_Joystick</SPAN
> structure on success. <SPAN
CLASS="RETURNVALUE"
>NULL</SPAN
> on failure.</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN6115"
></A
><H2
>Examples</H2
><P
><PRE
CLASS="PROGRAMLISTING"
>SDL_Joystick *joy;
// Check for joystick
if(SDL_NumJoysticks()&#62;0){
  // Open joystick
  joy=SDL_JoystickOpen(0);
  
  if(joy)
  {
    printf("Opened Joystick 0\n");
    printf("Name: %s\n", SDL_JoystickName(0));
    printf("Number of Axes: %d\n", SDL_JoystickNumAxes(joy));
    printf("Number of Buttons: %d\n", SDL_JoystickNumButtons(joy));
    printf("Number of Balls: %d\n", SDL_JoystickNumBalls(joy));
  }
  else
    printf("Couldn't open Joystick 0\n");
  
  // Close if opened
  if(SDL_JoystickOpened(0))
    SDL_JoystickClose(joy);
}</PRE
></P
></DIV
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><A
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></A
><H2
>See Also</H2
><P
><A
HREF="sdljoystickclose.html"
><TT
CLASS="FUNCTION"
>SDL_JoystickClose</TT
></A
></P
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