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annotate src/video/ataricommon/SDL_gemdosevents.c @ 1240:3b8a43c428bb

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From Bug #36: There are a couple of issues with the selection of Altivec alpha-blitting routines in CalculateAlphaBlit() in src/video/SDL_Blit_A.c. 1) There's no check for the presence of Altivec when checking if the Blit32to565PixelAlphaAltivec() routine can be selected. 2) Altivec cannot be used in video memory, and there's no check if the destination surface is a hardware surface. (Alpha-blitting to a hardware surface with GPU support is a bad idea, but somebody's bound to do it anyway.) Patch to fix these attached.
author Ryan C. Gordon <icculus@icculus.org>
date Sun, 08 Jan 2006 21:18:15 +0000
parents a8068adf156b
children a201a8c62522
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2004 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 Library General Public
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7 License as published by the Free Software Foundation; either
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8 version 2 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 Library 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 Library General Public
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16 License along with this library; if not, write to the Free
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17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 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
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23 #ifdef SAVE_RCSID
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24 static char rcsid =
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25 "@(#) $Id$";
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26 #endif
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27
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28 /*
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29 * Atari keyboard events manager, using Gemdos
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30 *
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31 * Patrice Mandin
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32 */
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33
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34 #include <string.h>
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35
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36 /* Mint includes */
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37 #include <mint/osbind.h>
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38 #include <mint/cookie.h>
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39
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40 #include "SDL.h"
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41 #include "SDL_sysevents.h"
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42 #include "SDL_events_c.h"
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43
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44 #include "SDL_atarikeys.h"
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45 #include "SDL_atarievents_c.h"
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46 #include "SDL_xbiosevents_c.h"
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47
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48 /* To save state of keyboard */
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49 #define ATARIBIOS_MAXKEYS 128
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50
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51 static unsigned char gemdos_currentkeyboard[ATARIBIOS_MAXKEYS];
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52 static unsigned char gemdos_previouskeyboard[ATARIBIOS_MAXKEYS];
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53 static unsigned char gemdos_currentascii[ATARIBIOS_MAXKEYS];
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54
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55 /* Special keys state */
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56 enum {
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57 K_RSHIFT=0,
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58 K_LSHIFT,
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59 K_CTRL,
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60 K_ALT,
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61 K_CAPSLOCK,
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62 K_CLRHOME,
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63 K_INSERT
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64 };
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65
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66 enum {
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67 DEV_BUSY=0,
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68 DEV_READY
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69 };
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70
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71 /* The translation tables from a console scancode to a SDL keysym */
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72 static SDLKey keymap[ATARIBIOS_MAXKEYS];
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73
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74 static SDL_keysym *TranslateKey(int scancode, int asciicode, SDL_keysym *keysym,
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75 SDL_bool pressed);
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76 static void UpdateSpecialKeys(int special_keys_state);
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77
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78 void AtariGemdos_InitOSKeymap(_THIS)
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79 {
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80 int i, vectors_mask;
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81 unsigned long dummy;
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82
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83 memset(gemdos_currentkeyboard, 0, sizeof(gemdos_currentkeyboard));
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84 memset(gemdos_previouskeyboard, 0, sizeof(gemdos_previouskeyboard));
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85
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86 /* Initialize keymap */
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87 for ( i=0; i<sizeof(keymap); i++ )
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88 keymap[i] = SDLK_UNKNOWN;
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89
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90 /* Functions keys */
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91 for ( i = 0; i<10; i++ )
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92 keymap[SCANCODE_F1 + i] = SDLK_F1+i;
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93
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94 /* Cursor keypad */
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95 keymap[SCANCODE_HELP] = SDLK_HELP;
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96 keymap[SCANCODE_UNDO] = SDLK_UNDO;
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97 keymap[SCANCODE_INSERT] = SDLK_INSERT;
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98 keymap[SCANCODE_CLRHOME] = SDLK_HOME;
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99 keymap[SCANCODE_UP] = SDLK_UP;
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100 keymap[SCANCODE_DOWN] = SDLK_DOWN;
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101 keymap[SCANCODE_RIGHT] = SDLK_RIGHT;
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102 keymap[SCANCODE_LEFT] = SDLK_LEFT;
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103
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104 /* Special keys */
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105 keymap[SCANCODE_ESCAPE] = SDLK_ESCAPE;
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106 keymap[SCANCODE_BACKSPACE] = SDLK_BACKSPACE;
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107 keymap[SCANCODE_TAB] = SDLK_TAB;
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108 keymap[SCANCODE_ENTER] = SDLK_RETURN;
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109 keymap[SCANCODE_DELETE] = SDLK_DELETE;
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110 keymap[SCANCODE_LEFTCONTROL] = SDLK_LCTRL;
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111 keymap[SCANCODE_LEFTSHIFT] = SDLK_LSHIFT;
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112 keymap[SCANCODE_RIGHTSHIFT] = SDLK_RSHIFT;
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113 keymap[SCANCODE_LEFTALT] = SDLK_LALT;
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114 keymap[SCANCODE_CAPSLOCK] = SDLK_CAPSLOCK;
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115
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116 vectors_mask = ATARI_XBIOS_MOUSEEVENTS|ATARI_XBIOS_JOYSTICKEVENTS;
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117 if (Getcookie(C_MiNT, &dummy)==C_FOUND) {
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118 vectors_mask = 0;
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119 }
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120
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121 SDL_AtariXbios_InstallVectors(vectors_mask);
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122 }
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123
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124 void AtariGemdos_PumpEvents(_THIS)
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125 {
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126 int i;
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127 SDL_keysym keysym;
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128
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129 /* Update pressed keys */
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130 memset(gemdos_currentkeyboard, 0, ATARIBIOS_MAXKEYS);
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131
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132 while (Cconis()!=DEV_BUSY) {
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133 unsigned long key_pressed;
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134 unsigned char scancode, asciicode;
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135
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136 key_pressed=Cnecin();
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137
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138 asciicode = key_pressed;
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139 scancode = key_pressed >> 16;
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140
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141 gemdos_currentkeyboard[scancode]=0xFF;
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142 gemdos_currentascii[scancode]=asciicode;
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143 }
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144
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145 /* Read special keys */
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146 UpdateSpecialKeys(Kbshift(-1));
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147
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148 /* Now generate events */
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149 for (i=0; i<ATARIBIOS_MAXKEYS; i++) {
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150 /* Key pressed ? */
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151 if (gemdos_currentkeyboard[i] && !gemdos_previouskeyboard[i])
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152 SDL_PrivateKeyboard(SDL_PRESSED,
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153 TranslateKey(i, gemdos_currentascii[i], &keysym, SDL_TRUE));
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154
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155 /* Key unpressed ? */
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156 if (gemdos_previouskeyboard[i] && !gemdos_currentkeyboard[i])
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157 SDL_PrivateKeyboard(SDL_RELEASED,
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158 TranslateKey(i, gemdos_currentascii[i], &keysym, SDL_FALSE));
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159 }
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160
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161 SDL_AtariXbios_PostMouseEvents(this);
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162
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163 /* Will be previous table */
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164 memcpy(gemdos_previouskeyboard, gemdos_currentkeyboard, ATARIBIOS_MAXKEYS);
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165 }
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166
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167 static void UpdateSpecialKeys(int special_keys_state)
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168 {
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169 #define UPDATE_SPECIAL_KEYS(numbit,scancode) \
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170 { \
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171 if (special_keys_state & (1<<(numbit))) { \
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172 gemdos_currentkeyboard[scancode]=0xFF; \
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173 gemdos_currentascii[scancode]=0; \
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174 } \
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175 }
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176
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177 UPDATE_SPECIAL_KEYS(K_RSHIFT, SCANCODE_RIGHTSHIFT);
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178 UPDATE_SPECIAL_KEYS(K_LSHIFT, SCANCODE_LEFTSHIFT);
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179 UPDATE_SPECIAL_KEYS(K_CTRL, SCANCODE_LEFTCONTROL);
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180 UPDATE_SPECIAL_KEYS(K_ALT, SCANCODE_LEFTALT);
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181 UPDATE_SPECIAL_KEYS(K_CAPSLOCK, SCANCODE_CAPSLOCK);
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182 }
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183
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184 static SDL_keysym *TranslateKey(int scancode, int asciicode, SDL_keysym *keysym,
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185 SDL_bool pressed)
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186 {
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187 /* Set the keysym information */
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188 keysym->scancode = scancode;
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189
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190 if (asciicode)
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191 keysym->sym = asciicode;
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192 else
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193 keysym->sym = keymap[scancode];
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194
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195 keysym->mod = KMOD_NONE;
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196 keysym->unicode = 0;
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197 if (SDL_TranslateUNICODE && pressed) {
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198 keysym->unicode = SDL_AtariToUnicodeTable[asciicode];
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199 }
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200
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201 return(keysym);
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202 }
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203
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204 void AtariGemdos_ShutdownEvents(void)
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205 {
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206 SDL_AtariXbios_RestoreVectors();
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207 }