src/video/x11/SDL_x11dga.c
author Sam Lantinga <slouken@libsdl.org>
Mon, 29 May 2006 04:04:35 +0000
branchSDL-1.3
changeset 1668 4da1ee79c9af
parent 1662 782fd950bd46
permissions -rw-r--r--
more tweaking indent options
     1 /*
     2     SDL - Simple DirectMedia Layer
     3     Copyright (C) 1997-2006 Sam Lantinga
     4 
     5     This library is free software; you can redistribute it and/or
     6     modify it under the terms of the GNU Lesser General Public
     7     License as published by the Free Software Foundation; either
     8     version 2.1 of the License, or (at your option) any later version.
     9 
    10     This library is distributed in the hope that it will be useful,
    11     but WITHOUT ANY WARRANTY; without even the implied warranty of
    12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    13     Lesser General Public License for more details.
    14 
    15     You should have received a copy of the GNU Lesser General Public
    16     License along with this library; if not, write to the Free Software
    17     Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
    18 
    19     Sam Lantinga
    20     slouken@libsdl.org
    21 */
    22 #include "SDL_config.h"
    23 
    24 /* This is currently only used to enable DGA mouse.
    25    The new fullscreen code makes it very difficult to handle DGA dynamically.
    26    There will be a completely separate DGA driver that is fullscreen-only.
    27 */
    28 
    29 #include "SDL_video.h"
    30 #include "../SDL_cursor_c.h"
    31 #include "SDL_x11dga_c.h"
    32 
    33 /* Global for the error handler */
    34 int dga_event, dga_error = -1;
    35 
    36 void
    37 X11_EnableDGAMouse(_THIS)
    38 {
    39 #if SDL_VIDEO_DRIVER_X11_DGAMOUSE
    40     int dga_major, dga_minor;
    41     int use_dgamouse;
    42     const char *env_use_dgamouse;
    43 
    44     /* Check configuration to see if we should use DGA mouse */
    45     use_dgamouse = 1;
    46     env_use_dgamouse = SDL_getenv("SDL_VIDEO_X11_DGAMOUSE");
    47     if (env_use_dgamouse) {
    48         use_dgamouse = atoi(env_use_dgamouse);
    49     }
    50     /* Check for buggy X servers */
    51     if (use_dgamouse && BUGGY_XFREE86( ==, 4000)) {
    52         use_dgamouse = 0;
    53     }
    54     /* Only use DGA mouse if the cursor is not showing (in relative mode) */
    55     if (use_dgamouse && local_X11 && !(using_dga & DGA_MOUSE) &&
    56         SDL_NAME(XF86DGAQueryExtension) (SDL_Display, &dga_event, &dga_error)
    57         && SDL_NAME(XF86DGAQueryVersion) (SDL_Display, &dga_major,
    58                                           &dga_minor)) {
    59         if (SDL_NAME(XF86DGADirectVideo)
    60             (SDL_Display, SDL_Screen, XF86DGADirectMouse)) {
    61             using_dga |= DGA_MOUSE;
    62         }
    63     }
    64 #endif /* SDL_VIDEO_DRIVER_X11_DGAMOUSE */
    65 }
    66 
    67 /* Argh.  Glide resets DGA mouse mode when it makes the context current! */
    68 void
    69 X11_CheckDGAMouse(_THIS)
    70 {
    71 #if SDL_VIDEO_DRIVER_X11_DGAMOUSE
    72     int flags;
    73 
    74     if (using_dga & DGA_MOUSE) {
    75         SDL_NAME(XF86DGAQueryDirectVideo) (SDL_Display, SDL_Screen, &flags);
    76         if (!(flags & XF86DGADirectMouse)) {
    77             SDL_NAME(XF86DGADirectVideo) (SDL_Display, SDL_Screen,
    78                                           XF86DGADirectMouse);
    79         }
    80     }
    81 #endif
    82 }
    83 
    84 void
    85 X11_DisableDGAMouse(_THIS)
    86 {
    87 #if SDL_VIDEO_DRIVER_X11_DGAMOUSE
    88     if (using_dga & DGA_MOUSE) {
    89         SDL_NAME(XF86DGADirectVideo) (SDL_Display, SDL_Screen, 0);
    90         using_dga &= ~DGA_MOUSE;
    91     }
    92 #endif /* SDL_VIDEO_DRIVER_X11_DGAMOUSE */
    93 }
    94 
    95 /* vi: set ts=4 sw=4 expandtab: */