e14743d1 |
1 | /* |
2 | SDL - Simple DirectMedia Layer |
3 | Copyright (C) 1997-2009 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 | There is a completely separate DGA driver that is fullscreen-only. |
26 | */ |
27 | |
28 | #include "SDL_video.h" |
29 | #include "../SDL_cursor_c.h" |
30 | #include "SDL_x11dga_c.h" |
31 | |
32 | /* Global for the error handler */ |
33 | int dga_event, dga_error = -1; |
34 | |
35 | void X11_EnableDGAMouse(_THIS) |
36 | { |
37 | #if SDL_VIDEO_DRIVER_X11_DGAMOUSE |
38 | static int use_dgamouse = -1; |
39 | |
40 | /* Check configuration to see if we should use DGA mouse */ |
41 | if ( use_dgamouse < 0 ) { |
42 | int dga_major, dga_minor; |
43 | int dga_flags; |
44 | const char *env_use_dgamouse; |
45 | |
46 | use_dgamouse = 1; |
47 | env_use_dgamouse = SDL_getenv("SDL_VIDEO_X11_DGAMOUSE"); |
48 | if ( env_use_dgamouse ) { |
49 | use_dgamouse = SDL_atoi(env_use_dgamouse); |
50 | } |
51 | /* Check for buggy X servers */ |
52 | if ( use_dgamouse && BUGGY_XFREE86(==, 4000) ) { |
53 | use_dgamouse = 0; |
54 | } |
55 | if ( !use_dgamouse || !local_X11 || |
56 | !SDL_NAME(XF86DGAQueryExtension)(SDL_Display, &dga_event, &dga_error) || |
57 | !SDL_NAME(XF86DGAQueryVersion)(SDL_Display, &dga_major, &dga_minor) || |
58 | !SDL_NAME(XF86DGAQueryDirectVideo)(SDL_Display, SDL_Screen, &dga_flags) || |
59 | !(dga_flags & XF86DGADirectPresent) ) { |
60 | use_dgamouse = 0; |
61 | } |
62 | } |
63 | |
64 | if ( use_dgamouse && !(using_dga & DGA_MOUSE) ) { |
65 | if ( SDL_NAME(XF86DGADirectVideo)(SDL_Display, SDL_Screen, XF86DGADirectMouse) ) { |
66 | using_dga |= DGA_MOUSE; |
67 | } |
68 | } |
69 | #endif /* SDL_VIDEO_DRIVER_X11_DGAMOUSE */ |
70 | } |
71 | |
72 | /* Argh. Glide resets DGA mouse mode when it makes the context current! */ |
73 | void X11_CheckDGAMouse(_THIS) |
74 | { |
75 | #if SDL_VIDEO_DRIVER_X11_DGAMOUSE |
76 | if ( using_dga & DGA_MOUSE ) { |
77 | SDL_NAME(XF86DGADirectVideo)(SDL_Display,SDL_Screen,XF86DGADirectMouse); |
78 | } |
79 | #endif |
80 | } |
81 | |
82 | void X11_DisableDGAMouse(_THIS) |
83 | { |
84 | #if SDL_VIDEO_DRIVER_X11_DGAMOUSE |
85 | if ( using_dga & DGA_MOUSE ) { |
86 | SDL_NAME(XF86DGADirectVideo)(SDL_Display, SDL_Screen, 0); |
87 | using_dga &= ~DGA_MOUSE; |
88 | } |
89 | #endif /* SDL_VIDEO_DRIVER_X11_DGAMOUSE */ |
90 | } |