/
SDL_x11dga.c
90 lines (77 loc) · 2.87 KB
/
SDL_x11dga.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
/*
SDL - Simple DirectMedia Layer
Copyright (C) 1997-2012 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 */
}