Mercurial > sdl-ios-xcode
view src/video/x11/SDL_x11gamma.c @ 1303:52b5afd7ecee
Date: Tue, 05 Jul 2005 21:43:26 +1000
From: Sean Childs
Subject: [SDL] Compiling SDL 1.2.8 with the free Borland compiler
When compiling SDL 1.2.8 with the free Borland compiler, I received this
error (there is a similar error that occurs in
src\video\windx5\sdl_dx5events.c):
Error E2342 ..\..\src\video\windib\sdl_dibevents.c 189: Type mismatch in
parameter 'lpPrevWndFunc' (wanted 'int (__stdcall *)()', got 'long
(__stdcall *)(void *,unsigned int,unsigned int,long)') in function
DIB_HandleMessage
I checked the MSDN library at:
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/winui/winui/
windowsuserinterface/windowing/windowprocedures/windowprocedurereference/wind
owprocedurefunctions/callwindowproc.asp
and it had this to say:
If STRICT is not defined, the lpPrevWndFunc parameter has the data type
FARPROC. The FARPROC type is declared as follows:
int (FAR WINAPI * FARPROC) ()
In C, the FARPROC declaration indicates a callback function that has an
unspecified parameter list. In C++, however, the empty parameter list in
the declaration indicates that a function has no parameters. This subtle
distinction can break careless code. Following is one way to handle this
situation:
#ifdef STRICT
WNDPROC MyWindowProcedure
#else
FARPROC MyWindowProcedure
#endif
...
lResult = CallWindowProc(MyWindowProcedure, ...)
author | Sam Lantinga <slouken@libsdl.org> |
---|---|
date | Tue, 31 Jan 2006 15:30:42 +0000 |
parents | 045f186426e1 |
children | c9b51268668f |
line wrap: on
line source
/* 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 #include "SDL.h" #include "SDL_events.h" #include "SDL_events_c.h" #include "SDL_x11video.h" /* From the X server sources... */ #define MAX_GAMMA 10.0 #define MIN_GAMMA (1.0/MAX_GAMMA) static int X11_SetGammaNoLock(_THIS, float red, float green, float blue) { #ifdef XFREE86_VMGAMMA if (use_vidmode >= 200) { SDL_NAME(XF86VidModeGamma) gamma; Bool succeeded; /* Clamp the gamma values */ if ( red < MIN_GAMMA ) { gamma.red = MIN_GAMMA; } else if ( red > MAX_GAMMA ) { gamma.red = MAX_GAMMA; } else { gamma.red = red; } if ( green < MIN_GAMMA ) { gamma.green = MIN_GAMMA; } else if ( green > MAX_GAMMA ) { gamma.green = MAX_GAMMA; } else { gamma.green = green; } if ( blue < MIN_GAMMA ) { gamma.blue = MIN_GAMMA; } else if ( blue > MAX_GAMMA ) { gamma.blue = MAX_GAMMA; } else { gamma.blue = blue; } if ( SDL_GetAppState() & SDL_APPACTIVE ) { succeeded = SDL_NAME(XF86VidModeSetGamma)(SDL_Display, SDL_Screen, &gamma); pXSync(SDL_Display, False); } else { gamma_saved[0] = gamma.red; gamma_saved[1] = gamma.green; gamma_saved[2] = gamma.blue; succeeded = True; } if ( succeeded ) { ++gamma_changed; } return succeeded ? 0 : -1; } #endif SDL_SetError("Gamma correction not supported"); return -1; } int X11_SetVidModeGamma(_THIS, float red, float green, float blue) { int result; SDL_Lock_EventThread(); result = X11_SetGammaNoLock(this, red, green, blue); SDL_Unlock_EventThread(); return(result); } static int X11_GetGammaNoLock(_THIS, float *red, float *green, float *blue) { #ifdef XFREE86_VMGAMMA if (use_vidmode >= 200) { SDL_NAME(XF86VidModeGamma) gamma; if (SDL_NAME(XF86VidModeGetGamma)(SDL_Display, SDL_Screen, &gamma)) { *red = gamma.red; *green = gamma.green; *blue = gamma.blue; return 0; } return -1; } #endif return -1; } int X11_GetVidModeGamma(_THIS, float *red, float *green, float *blue) { int result; SDL_Lock_EventThread(); result = X11_GetGammaNoLock(this, red, green, blue); SDL_Unlock_EventThread(); return(result); } void X11_SaveVidModeGamma(_THIS) { /* Try to save the current gamma, otherwise disable gamma control */ if ( X11_GetGammaNoLock(this, &gamma_saved[0], &gamma_saved[1], &gamma_saved[2]) < 0 ) { this->SetGamma = 0; this->GetGamma = 0; } gamma_changed = 0; } void X11_SwapVidModeGamma(_THIS) { float new_gamma[3]; if ( gamma_changed ) { new_gamma[0] = gamma_saved[0]; new_gamma[1] = gamma_saved[1]; new_gamma[2] = gamma_saved[2]; X11_GetGammaNoLock(this, &gamma_saved[0], &gamma_saved[1], &gamma_saved[2]); X11_SetGammaNoLock(this, new_gamma[0], new_gamma[1], new_gamma[2]); } }