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Date: Mon, 3 May 2004 03:15:01 +0100 From: David Symmonds Subject: SDL Typedef Structs Hi, Thanks for the SDL libraries, I have been using them for about a year now and they are really brilliant. One thing that I have just found whilst using them through C++ (and needing forward declarations) is that when you typedef structs you sometimes use typedef struct Name { ... }Name; e.g. SDL_Surface and other times use typedef struct { ... }Name; e.g. SDL_Rect The first type works fine, when I define a header file I can just put 'struct Name;' at the top and use the Name throughout. However, the second type is harder to use in a header, and I haven't found a way yet, other than to include 'SDL.h' in the header file (undesirable). Would there be any harm in changing the definition of SDL_Rect and such like to the second form?
author Sam Lantinga <slouken@libsdl.org>
date Sun, 18 Jul 2004 22:57:40 +0000
parents 3bd4d7a1ee04
children c9b51268668f
line wrap: on
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/*
    SDL - Simple DirectMedia Layer
    Copyright (C) 1997-2004 Sam Lantinga

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Library General Public
    License as published by the Free Software Foundation; either
    version 2 of the License, or (at your option) any later version.

    This library is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    Library General Public License for more details.

    You should have received a copy of the GNU Library General Public
    License along with this library; if not, write to the Free
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

    Sam Lantinga
    slouken@libsdl.org
*/

#ifdef SAVE_RCSID
static char rcsid =
 "@(#) $Id$";
#endif

#ifndef _SDL_lowvideo_h
#define _SDL_lowvideo_h

#include "SDL_BWin.h"
#include "SDL_mouse.h"
#include "SDL_sysvideo.h"

/* Hidden "this" pointer for the video functions */
#define _THIS	SDL_VideoDevice *_this

/* Private display data */
struct SDL_PrivateVideoData {
	/* The main window */
	SDL_BWin *SDL_Win;

	/* The fullscreen mode list */
	display_mode saved_mode;
#define NUM_MODELISTS	4		/* 8, 16, 24, and 32 bits-per-pixel */
	int SDL_nummodes[NUM_MODELISTS];
	SDL_Rect **SDL_modelist[NUM_MODELISTS];

	/* A completely clear cursor */
	WMcursor *BlankCursor;

	SDL_Overlay *overlay;
};
/* Old variable names */
#define SDL_Win		(_this->hidden->SDL_Win)
#define saved_mode	(_this->hidden->saved_mode)
#define SDL_nummodes	(_this->hidden->SDL_nummodes)
#define SDL_modelist	(_this->hidden->SDL_modelist)
#define SDL_BlankCursor	(_this->hidden->BlankCursor)
#define current_overlay (_this->hidden->overlay)

#endif /* _SDL_lowvideo_h */