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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_SYS_YUV_H__
#define __SDL_SYS_YUV_H__

/* This is the BeOS implementation of YUV video overlays */

#include "SDL_video.h"
#include "SDL_lowvideo.h"

extern "C"
{

    struct private_yuvhwdata
    {
/*  FRAMEDATA* CurrentFrameData;
    FRAMEDATA* FrameData0;
    FRAMEDATA* FrameData1;
    PgScalerProps_t   props;
    PgScalerCaps_t    caps;
    PgVideoChannel_t* channel;
    PhArea_t CurrentViewPort;
    PhPoint_t CurrentWindowPos;
    long format;
    int scaler_on;
    int current;
    long YStride;
    long VStride;
    long UStride;
    int ischromakey;
    long chromakey;
    int forcedredraw;
    unsigned long State;
    long flags;
*/
        SDL_Surface *display;
        BView *bview;
        bool first_display;
        BBitmap *bbitmap;
        int locked;
    };

    extern BBitmap *BE_GetOverlayBitmap(BRect bounds, color_space cs);
    extern SDL_Overlay *BE_CreateYUVOverlay(_THIS, int width, int height,
                                            Uint32 format,
                                            SDL_Surface * display);
    extern int BE_LockYUVOverlay(_THIS, SDL_Overlay * overlay);
    extern void BE_UnlockYUVOverlay(_THIS, SDL_Overlay * overlay);
    extern int BE_DisplayYUVOverlay(_THIS, SDL_Overlay * overlay,
                                    SDL_Rect * src, SDL_Rect * dst);
    extern void BE_FreeYUVOverlay(_THIS, SDL_Overlay * overlay);

};

#endif /* __SDL_PH_YUV_H__ */
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