| /* |
| SDL - Simple DirectMedia Layer |
| Copyright (C) 1997-2006 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" |
| |
| /* This is currently only used to enable DGA mouse. |
| There is a completely separate DGA driver that is fullscreen-only. |
| */ |
| |
| #include "SDL_video.h" |
| #include "../SDL_cursor_c.h" |
| #include "SDL_x11dga_c.h" |
| |
| /* Global for the error handler */ |
| int dga_event, dga_error = -1; |
| |
| void X11_EnableDGAMouse(_THIS) |
| { |
| #if SDL_VIDEO_DRIVER_X11_DGAMOUSE |
| static int use_dgamouse = -1; |
| |
| /* Check configuration to see if we should use DGA mouse */ |
| 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; |
| } |
| } |
| |
| if ( use_dgamouse && !(using_dga & DGA_MOUSE) ) { |
| if ( SDL_NAME(XF86DGADirectVideo)(SDL_Display, SDL_Screen, XF86DGADirectMouse) ) { |
| using_dga |= DGA_MOUSE; |
| } |
| } |
| #endif /* SDL_VIDEO_DRIVER_X11_DGAMOUSE */ |
| } |
| |
| /* Argh. Glide resets DGA mouse mode when it makes the context current! */ |
| void X11_CheckDGAMouse(_THIS) |
| { |
| #if SDL_VIDEO_DRIVER_X11_DGAMOUSE |
| if ( using_dga & DGA_MOUSE ) { |
| SDL_NAME(XF86DGADirectVideo)(SDL_Display,SDL_Screen,XF86DGADirectMouse); |
| } |
| #endif |
| } |
| |
| void X11_DisableDGAMouse(_THIS) |
| { |
| #if SDL_VIDEO_DRIVER_X11_DGAMOUSE |
| if ( using_dga & DGA_MOUSE ) { |
| SDL_NAME(XF86DGADirectVideo)(SDL_Display, SDL_Screen, 0); |
| using_dga &= ~DGA_MOUSE; |
| } |
| #endif /* SDL_VIDEO_DRIVER_X11_DGAMOUSE */ |
| } |