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view src/video/bwindow/SDL_lowvideo.h @ 3496:78fc8ea578b2

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Joe 2009-11-23 21:31:10 PST If type is ::SDL_HAPTIC_CARTESIAN, direction is encoded by three positions 367 * (X axis, Y axis and Z axis (with 3 axes)). ::SDL_HAPTIC_CARTESIAN uses 368 * the first three \c dir parameters. The cardinal directions would be: 369 * - North: 0,-1, 0 370 * - East: -1, 0, 0 371 * - South: 0, 1, 0 372 * - West: 1, 0, 0 typedef struct SDL_HapticDirection { Uint8 type; /**< The type of encoding. */ Uint16 dir[3]; /**< The encoded direction. */ } SDL_HapticDirection; An unsigned int can't store negative values and I don't see an alternate way to encode them in the docs or source. The best I have been able to come up with is using a negative magnitude for the effect but this will only get me 2 of the 4 quadrants in the plane for 2d effects. I looked at the win32 and linux implementations and I believe is is safe to use signed ints in the direction struct. I am unfamiliar with the darwin haptics API so I don't know if it is safe.
author Sam Lantinga <slouken@libsdl.org>
date Fri, 27 Nov 2009 19:29:27 +0000
parents 99210400e8b9
children f7b03b6838cb
line wrap: on
line source

/*
    SDL - Simple DirectMedia Layer
    Copyright (C) 1997-2009 Sam Lantinga

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
    License as published by the Free Software Foundation; either
    version 2.1 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
    Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public
    License along with this library; if not, write to the Free Software
    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

    Sam Lantinga
    slouken@libsdl.org
*/
#include "SDL_config.h"

#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 */
/* vi: set ts=4 sw=4 expandtab: */