SDL_x11dga.c
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/*
SDL - Simple DirectMedia Layer
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Copyright (C) 1997-2012 Sam Lantinga
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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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
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Lesser General Public License for more details.
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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
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Sam Lantinga
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slouken@libsdl.org
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*/
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#include "SDL_config.h"
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/* This is currently only used to enable DGA mouse.
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*/
#include "SDL_video.h"
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#include "../SDL_cursor_c.h"
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#include "SDL_x11dga_c.h"
/* Global for the error handler */
int dga_event, dga_error = -1;
void X11_EnableDGAMouse(_THIS)
{
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#if SDL_VIDEO_DRIVER_X11_DGAMOUSE
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/* Check configuration to see if we should use DGA mouse */
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if ( use_dgamouse < 0 ) {
int dga_major, dga_minor;
int dga_flags;
const char *env_use_dgamouse;
use_dgamouse = 1;
env_use_dgamouse = SDL_getenv("SDL_VIDEO_X11_DGAMOUSE");
if ( env_use_dgamouse ) {
use_dgamouse = SDL_atoi(env_use_dgamouse);
}
/* Check for buggy X servers */
if ( use_dgamouse && BUGGY_XFREE86(==, 4000) ) {
use_dgamouse = 0;
}
if ( !use_dgamouse || !local_X11 ||
!SDL_NAME(XF86DGAQueryExtension)(SDL_Display, &dga_event, &dga_error) ||
!SDL_NAME(XF86DGAQueryVersion)(SDL_Display, &dga_major, &dga_minor) ||
!SDL_NAME(XF86DGAQueryDirectVideo)(SDL_Display, SDL_Screen, &dga_flags) ||
!(dga_flags & XF86DGADirectPresent) ) {
use_dgamouse = 0;
}
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}
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if ( SDL_NAME(XF86DGADirectVideo)(SDL_Display, SDL_Screen, XF86DGADirectMouse) ) {
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using_dga |= DGA_MOUSE;
}
}
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#endif /* SDL_VIDEO_DRIVER_X11_DGAMOUSE */
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}
/* Argh. Glide resets DGA mouse mode when it makes the context current! */
void X11_CheckDGAMouse(_THIS)
{
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#if SDL_VIDEO_DRIVER_X11_DGAMOUSE
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if ( using_dga & DGA_MOUSE ) {
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}
#endif
}
void X11_DisableDGAMouse(_THIS)
{
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#if SDL_VIDEO_DRIVER_X11_DGAMOUSE
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if ( using_dga & DGA_MOUSE ) {
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SDL_NAME(XF86DGADirectVideo)(SDL_Display, SDL_Screen, 0);
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using_dga &= ~DGA_MOUSE;
}
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#endif /* SDL_VIDEO_DRIVER_X11_DGAMOUSE */