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annotate src/video/win32/SDL_win32keyboard.c @ 2311:54e21acfec5a

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Friggin' Windows remaps alphabetic keys based on keyboard layout. We try to figure out what the actual layout independent values are.
author Sam Lantinga <slouken@libsdl.org>
date Sat, 09 Feb 2008 22:28:27 +0000
parents 514f7c1651fc
children f537a293b3da
rev   line source
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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 #include "SDL_win32video.h"
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25
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26 #include "../../events/SDL_keyboard_c.h"
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27 #include "../../events/scancodes_win32.h"
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28
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29 #ifndef MAPVK_VK_TO_VSC
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30 #define MAPVK_VK_TO_VSC 0
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31 #endif
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32 #ifndef MAPVK_VSC_TO_VK
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33 #define MAPVK_VSC_TO_VK 1
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34 #endif
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35 #ifndef MAPVK_VK_TO_CHAR
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36 #define MAPVK_VK_TO_CHAR 2
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37 #endif
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38
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39 /* Alphabetic scancodes for PC keyboards */
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40 BYTE alpha_scancodes[26] = {
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41 30, 48, 46, 32, 18, 33, 34, 35, 23, 36, 37, 38, 50, 49, 24,
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42 25, 16, 19, 31, 20, 22, 47, 17, 45, 21, 44
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43 };
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44
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45 void
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46 WIN_InitKeyboard(_THIS)
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47 {
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48 SDL_VideoData *data = (SDL_VideoData *) _this->driverdata;
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49 SDL_Keyboard keyboard;
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50 int i;
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51
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52 /* Make sure the alpha scancodes are correct. T isn't usually remapped */
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53 if (MapVirtualKey('T', MAPVK_VK_TO_VSC) != alpha_scancodes['T'-'A']) {
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54 printf("Fixing alpha scancode map, assuming US QWERTY layout!\nPlease send the following 26 lines of output to the SDL mailing list <sdl@libsdl.org>, including a description of your keyboard hardware.\n");
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55 for (i = 0; i < SDL_arraysize(alpha_scancodes); ++i) {
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56 alpha_scancodes[i] = MapVirtualKey('A'+i, MAPVK_VK_TO_VSC);
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57 printf("%d = %d\n", i, alpha_scancodes[i]);
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58 }
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59 }
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60
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61 data->key_layout = win32_scancode_table;
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62
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63 SDL_zero(keyboard);
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64 data->keyboard = SDL_AddKeyboard(&keyboard, -1);
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65 WIN_UpdateKeymap(data->keyboard);
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66
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67 SDL_SetScancodeName(SDL_SCANCODE_APPLICATION, "Menu");
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68 SDL_SetScancodeName(SDL_SCANCODE_LGUI, "Left Windows");
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69 SDL_SetScancodeName(SDL_SCANCODE_RGUI, "Right Windows");
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70 }
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71
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72 void
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73 WIN_UpdateKeymap(int keyboard)
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74 {
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75 int i;
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76 SDL_scancode scancode;
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77 SDLKey keymap[SDL_NUM_SCANCODES];
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78
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79 SDL_GetDefaultKeymap(keymap);
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80
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81 for (i = 0; i < SDL_arraysize(win32_scancode_table); i++) {
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82
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83 /* Make sure this scancode is a valid character scancode */
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84 scancode = win32_scancode_table[i];
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85 if (scancode == SDL_SCANCODE_UNKNOWN ||
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86 (keymap[scancode] & SDLK_SCANCODE_MASK)) {
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87 continue;
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88 }
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89
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90 /* Alphabetic keys are handled specially, since Windows remaps them */
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91 if (i >= 'A' && i <= 'Z') {
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92 BYTE vsc = alpha_scancodes[i-'A'];
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93 keymap[scancode] = MapVirtualKey(vsc, MAPVK_VSC_TO_VK) + 0x20;
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94 } else {
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95 keymap[scancode] = (MapVirtualKey(i, MAPVK_VK_TO_CHAR) & 0x7FFF);
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96 }
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97 }
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98 SDL_SetKeymap(keyboard, 0, keymap, SDL_NUM_SCANCODES);
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99 }
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100
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101 void
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102 WIN_QuitKeyboard(_THIS)
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103 {
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104 SDL_VideoData *data = (SDL_VideoData *) _this->driverdata;
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105
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106 SDL_DelKeyboard(data->keyboard);
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107 }
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108
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109 /* vi: set ts=4 sw=4 expandtab: */