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comparison src/video/x11/SDL_x11dga.c @ 0:74212992fb08

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Initial revision
author Sam Lantinga <slouken@lokigames.com>
date Thu, 26 Apr 2001 16:45:43 +0000
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children e8157fcb3114
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1 /*
2 SDL - Simple DirectMedia Layer
3 Copyright (C) 1997, 1998, 1999, 2000, 2001 Sam Lantinga
4
5 This library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Library General Public
7 License as published by the Free Software Foundation; either
8 version 2 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 Library General Public License for more details.
14
15 You should have received a copy of the GNU Library General Public
16 License along with this library; if not, write to the Free
17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18
19 Sam Lantinga
20 slouken@devolution.com
21 */
22
23 #ifdef SAVE_RCSID
24 static char rcsid =
25 "@(#) $Id$";
26 #endif
27
28 /* This is currently only used to enable DGA mouse.
29 The new fullscreen code makes it very difficult to handle DGA dynamically.
30 There will be a completely separate DGA driver that is fullscreen-only.
31 */
32
33 #include <stdlib.h> /* For getenv() */
34 #include "SDL_video.h"
35 #include "SDL_cursor_c.h"
36 #include "SDL_x11dga_c.h"
37
38 /* Global for the error handler */
39 int dga_event, dga_error = -1;
40
41 void X11_EnableDGAMouse(_THIS)
42 {
43 #ifdef XFREE86_DGAMOUSE
44 int dga_major, dga_minor;
45 int use_dgamouse;
46 const char *env_use_dgamouse;
47
48 /* Check configuration to see if we should use DGA mouse */
49 #ifdef DEFAULT_DGAMOUSE
50 use_dgamouse = 1;
51 #else
52 use_dgamouse = 0;
53 #endif
54 env_use_dgamouse = getenv("SDL_VIDEO_X11_DGAMOUSE");
55 if ( env_use_dgamouse ) {
56 use_dgamouse = atoi(env_use_dgamouse);
57 }
58 /* Check for buggy X servers */
59 if ( use_dgamouse && BUGGY_XFREE86(==, 4000) ) {
60 use_dgamouse = 0;
61 }
62 /* Only use DGA mouse if the cursor is not showing (in relative mode) */
63 if ( use_dgamouse && local_X11 && !(using_dga & DGA_MOUSE) &&
64 XF86DGAQueryExtension(SDL_Display, &dga_event, &dga_error) &&
65 XF86DGAQueryVersion(SDL_Display, &dga_major, &dga_minor) ) {
66 if ( XF86DGADirectVideo(SDL_Display, SDL_Screen, XF86DGADirectMouse) ) {
67 using_dga |= DGA_MOUSE;
68 }
69 }
70 #endif /* XFREE86_DGAMOUSE */
71 }
72
73 /* Argh. Glide resets DGA mouse mode when it makes the context current! */
74 void X11_CheckDGAMouse(_THIS)
75 {
76 #ifdef XFREE86_DGAMOUSE
77 int flags;
78
79 if ( using_dga & DGA_MOUSE ) {
80 XF86DGAQueryDirectVideo(SDL_Display, SDL_Screen, &flags);
81 if ( ! (flags & XF86DGADirectMouse) ) {
82 XF86DGADirectVideo(SDL_Display,SDL_Screen,XF86DGADirectMouse);
83 }
84 }
85 #endif
86 }
87
88 void X11_DisableDGAMouse(_THIS)
89 {
90 #ifdef XFREE86_DGAMOUSE
91 if ( using_dga & DGA_MOUSE ) {
92 XF86DGADirectVideo(SDL_Display, SDL_Screen, 0);
93 using_dga &= ~DGA_MOUSE;
94 }
95 #endif /* XFREE86_DGAMOUSE */
96 }