view src/video/os2fslib/SDL_os2fslib.h @ 1259:36f24cdfcda7

te: Thu, 17 Apr 2003 11:25:26 -0700 From: "Jim" Subject: [SDL] Frame buffer patches... Would seem that GCC 3.2.2 promotes all signed values to unsigned if any single vlaue is unsigned in an expression... for instance when calculating an elo touch position....evertyhign is an (int) except for cach_vinfo.xres which is unsigned. THerefore if y ou reverse the SDL_ELO_MIN_X and SDL_ELO_MAX_X values the resulging negative value pegs the expression to it's max. Attached it the accumu lated patch to typecast the unsigned values to (int) - *dx = (cache_vinfo.xres - (cache_vinfo.xres * (input_x - ELO_MIN_X)) / width); + *dx = ((int)cache_vinfo.xres - ((int)cache_vinfo.xres * (input_x - ELO_MIN_X)) / width); and also to provide quite failure to operations which have the screen currently locked... The touch screen I'm using the original values were exactly opposite of any position I touched on the screen - evaluating the math the expr ession SHOULD have handled reversing the min and max values - and after casting the unsigned .xres and .yres to a signed int - worked well. .. Jim
author Sam Lantinga <slouken@libsdl.org>
date Tue, 24 Jan 2006 06:36:43 +0000
parents 173c063d4f55
children d910939febfa
line wrap: on
line source

/*
    SDL - Simple DirectMedia Layer
    Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002  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
*/

#ifndef _SDL_os2fslib_h
#define _SDL_os2fslib_h


// OS2 specific includes
#define INCL_TYPES
#define INCL_DOS
#define INCL_DOSERRORS
#define INCL_DOSPROCESS
#define INCL_WIN
#define INCL_GPI
#include <os2.h>

#include <FSLib.h>

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

/* Private display data */
struct SDL_PrivateVideoData
{
  FSLib_VideoMode_p   pAvailableFSLibVideoModes;
  SDL_Rect          **pListModesResult; // Allocated memory to return list of modes for os2fslib_ListModes() API

  FSLib_VideoMode     SrcBufferDesc;    // Description of current source image buffer
  char               *pchSrcBuffer;     // The source image buffer itself
  SDL_Surface        *pSDLSurface;      // The SDL surface describing the buffer
  HMTX                hmtxUseSrcBuffer; // Mutex semaphore to manipulate src buffer
  HWND                hwndFrame, hwndClient;  // Window handle of frame and client
  int                 iPMThreadStatus;  // 0: Not running
                                        // 1: Running
                                        // Other: Not running, had an error
  int                 tidPMThread;      // Thread ID of PM Thread
  int                 fInFocus;         // True if we're in focus!
  int                 iSkipWMMOUSEMOVE; // Number of WM_MOUSEMOVE messages to skip!
  int                 iMouseVisible;    //
};

extern DECLSPEC void SDLCALL SDL_OS2FSLIB_SetFCFToUse(ULONG ulFCF);

#endif /* _SDL_os2fslib_h */