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 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
X11_EnableDGAMouse(_THIS)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! */
X11_CheckDGAMouse(_THIS)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
X11_DisableDGAMouse(_THIS)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 }
91