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annotate src/video/x11/SDL_x11dga.c @ 1662:782fd950bd46 SDL-1.3

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Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. WARNING: None of the video drivers have been updated for the new API yet! The API is still under design and very fluid. The code is now run through a consistent indent format: indent -i4 -nut -nsc -br -ce The headers are being converted to automatically generate doxygen documentation.
author Sam Lantinga <slouken@libsdl.org>
date Sun, 28 May 2006 13:04:16 +0000
parents d910939febfa
children 4da1ee79c9af
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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 The new fullscreen code makes it very difficult to handle DGA dynamically.
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26 There will be a completely separate DGA driver that is fullscreen-only.
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27 */
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28
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29 #include "SDL_video.h"
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30 #include "../SDL_cursor_c.h"
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31 #include "SDL_x11dga_c.h"
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32
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33 /* Global for the error handler */
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34 int dga_event, dga_error = -1;
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35
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36 void
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37 X11_EnableDGAMouse (_THIS)
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38 {
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39 #if SDL_VIDEO_DRIVER_X11_DGAMOUSE
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40 int dga_major, dga_minor;
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41 int use_dgamouse;
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42 const char *env_use_dgamouse;
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43
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44 /* Check configuration to see if we should use DGA mouse */
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45 use_dgamouse = 1;
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46 env_use_dgamouse = SDL_getenv ("SDL_VIDEO_X11_DGAMOUSE");
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47 if (env_use_dgamouse) {
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48 use_dgamouse = atoi (env_use_dgamouse);
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49 }
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50 /* Check for buggy X servers */
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51 if (use_dgamouse && BUGGY_XFREE86 ( ==, 4000)) {
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52 use_dgamouse = 0;
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53 }
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54 /* Only use DGA mouse if the cursor is not showing (in relative mode) */
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55 if (use_dgamouse && local_X11 && !(using_dga & DGA_MOUSE) &&
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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,
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58 &dga_minor)) {
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59 if (SDL_NAME (XF86DGADirectVideo)
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60 (SDL_Display, SDL_Screen, XF86DGADirectMouse)) {
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61 using_dga |= DGA_MOUSE;
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62 }
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63 }
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64 #endif /* SDL_VIDEO_DRIVER_X11_DGAMOUSE */
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65 }
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66
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67 /* Argh. Glide resets DGA mouse mode when it makes the context current! */
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68 void
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69 X11_CheckDGAMouse (_THIS)
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70 {
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71 #if SDL_VIDEO_DRIVER_X11_DGAMOUSE
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72 int flags;
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73
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74 if (using_dga & DGA_MOUSE) {
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75 SDL_NAME (XF86DGAQueryDirectVideo) (SDL_Display, SDL_Screen, &flags);
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76 if (!(flags & XF86DGADirectMouse)) {
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77 SDL_NAME (XF86DGADirectVideo) (SDL_Display, SDL_Screen,
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78 XF86DGADirectMouse);
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79 }
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80 }
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81 #endif
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82 }
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83
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84 void
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85 X11_DisableDGAMouse (_THIS)
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86 {
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87 #if SDL_VIDEO_DRIVER_X11_DGAMOUSE
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88 if (using_dga & DGA_MOUSE) {
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89 SDL_NAME (XF86DGADirectVideo) (SDL_Display, SDL_Screen, 0);
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90 using_dga &= ~DGA_MOUSE;
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91 }
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92 #endif /* SDL_VIDEO_DRIVER_X11_DGAMOUSE */
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93 }
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94
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95 /* vi: set ts=4 sw=4 expandtab: */