annotate src/video/x11/SDL_x11dga.c @ 4170:092c0bc69155 SDL-1.2

Fixed bug #618 Description From Tim Angus 2008-08-30 12:23:56 (-) [reply] As we all know SDL 1.2 doesn't handle dead keys well since one key press potentially equals two (or more) characters. For example, on many layouts, keying <backquote>,<space> results in <no character>,<backquote><space>. Since the unicode member of the SDL_keysym struct only has room for one character, only one can be returned. On Linux, the first character is returned. On Windows however, unless the exact number of characters generated by the keypress is 1, nothing is returned. The following patch addresses this inconsistency. Updated patch which includes a further fix to the handling of the numpad when numlock is on. This further fix is courtesy Amanieu d'Antras.
author Sam Lantinga <slouken@libsdl.org>
date Mon, 13 Apr 2009 08:42:09 +0000
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2009 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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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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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 }