annotate src/video/x11/SDL_x11dga.c @ 4050:ef815c44c662 SDL-1.2

Warn Visual C++ users if they have a stale configure generated SDL_config.h
author Sam Lantinga <slouken@libsdl.org>
date Thu, 12 Jul 2007 02:51:58 +0000
parents cbad710a6509
children a1b03ba2fcd0
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2006 Sam Lantinga
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4
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5 This library is free software; you can redistribute it and/or
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6 modify it under the terms of the GNU Lesser General Public
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7 License as published by the Free Software Foundation; either
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8 version 2.1 of the License, or (at your option) any later version.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Lesser General Public License for more details.
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14
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15 You should have received a copy of the GNU Lesser General Public
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16 License along with this library; if not, write to the Free Software
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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18
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19 Sam Lantinga
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20 slouken@libsdl.org
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21 */
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22 #include "SDL_config.h"
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23
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24 /* This is currently only used to enable DGA mouse.
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25 There is a completely separate DGA driver that is fullscreen-only.
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26 */
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27
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28 #include "SDL_video.h"
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29 #include "../SDL_cursor_c.h"
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30 #include "SDL_x11dga_c.h"
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31
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32 /* Global for the error handler */
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33 int dga_event, dga_error = -1;
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34
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35 void X11_EnableDGAMouse(_THIS)
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36 {
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37 #if SDL_VIDEO_DRIVER_X11_DGAMOUSE
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38 static int use_dgamouse = -1;
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39
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40 /* Check configuration to see if we should use DGA mouse */
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41 if ( use_dgamouse < 0 ) {
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42 int dga_major, dga_minor;
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43 int dga_flags;
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44 const char *env_use_dgamouse;
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45
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46 use_dgamouse = 1;
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47 env_use_dgamouse = SDL_getenv("SDL_VIDEO_X11_DGAMOUSE");
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48 if ( env_use_dgamouse ) {
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49 use_dgamouse = SDL_atoi(env_use_dgamouse);
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50 }
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51 /* Check for buggy X servers */
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52 if ( use_dgamouse && BUGGY_XFREE86(==, 4000) ) {
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53 use_dgamouse = 0;
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54 }
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55 if ( !use_dgamouse || !local_X11 ||
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56 !SDL_NAME(XF86DGAQueryExtension)(SDL_Display, &dga_event, &dga_error) ||
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57 !SDL_NAME(XF86DGAQueryVersion)(SDL_Display, &dga_major, &dga_minor) ||
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58 !SDL_NAME(XF86DGAQueryDirectVideo)(SDL_Display, SDL_Screen, &dga_flags) ||
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59 !(dga_flags & XF86DGADirectPresent) ) {
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60 use_dgamouse = 0;
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61 }
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62 }
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63
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64 if ( use_dgamouse && !(using_dga & DGA_MOUSE) ) {
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65 if ( SDL_NAME(XF86DGADirectVideo)(SDL_Display, SDL_Screen, XF86DGADirectMouse) ) {
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66 using_dga |= DGA_MOUSE;
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67 }
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68 }
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69 #endif /* SDL_VIDEO_DRIVER_X11_DGAMOUSE */
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70 }
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71
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72 /* Argh. Glide resets DGA mouse mode when it makes the context current! */
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73 void X11_CheckDGAMouse(_THIS)
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74 {
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75 #if SDL_VIDEO_DRIVER_X11_DGAMOUSE
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76 if ( using_dga & DGA_MOUSE ) {
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77 SDL_NAME(XF86DGADirectVideo)(SDL_Display,SDL_Screen,XF86DGADirectMouse);
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78 }
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79 #endif
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80 }
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81
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82 void X11_DisableDGAMouse(_THIS)
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83 {
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84 #if SDL_VIDEO_DRIVER_X11_DGAMOUSE
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85 if ( using_dga & DGA_MOUSE ) {
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86 SDL_NAME(XF86DGADirectVideo)(SDL_Display, SDL_Screen, 0);
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87 using_dga &= ~DGA_MOUSE;
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88 }
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89 #endif /* SDL_VIDEO_DRIVER_X11_DGAMOUSE */
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90 }