Mercurial > sdl-ios-xcode
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 |
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/* 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 */