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annotate src/video/gem/SDL_gemmouse.c @ 4253:b0c979816d67 SDL-1.2

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Improved bug #759 Don't crash if creating the X image failed.
author Sam Lantinga <slouken@libsdl.org>
date Sun, 27 Sep 2009 22:29:13 +0000
parents a1b03ba2fcd0
children
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2009 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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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 /*
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25 * GEM Mouse manager
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26 *
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27 * Patrice Mandin
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28 */
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29
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30 #include <gem.h>
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31
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32 #include "SDL_mouse.h"
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33 #include "../../events/SDL_events_c.h"
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34 #include "../SDL_cursor_c.h"
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35 #include "SDL_gemmouse_c.h"
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36 #include "SDL_gemvideo.h"
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37
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38 /* Defines */
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39
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40 /*#define DEBUG_VIDEO_GEM 1*/
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41
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42 #define MAXCURWIDTH 16
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43 #define MAXCURHEIGHT 16
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44
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45 void GEM_FreeWMCursor(_THIS, WMcursor *cursor)
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46 {
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47 #ifdef DEBUG_VIDEO_GEM
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48 printf("sdl:video:gem: free cursor\n");
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49 #endif
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50
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51 if (cursor == NULL)
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52 return;
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53
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54 graf_mouse(ARROW, NULL);
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55
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56 if (cursor->mform_p != NULL)
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57 SDL_free(cursor->mform_p);
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58
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59 SDL_free(cursor);
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60 }
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61
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62 WMcursor *GEM_CreateWMCursor(_THIS,
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63 Uint8 *data, Uint8 *mask, int w, int h, int hot_x, int hot_y)
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64 {
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65 WMcursor *cursor;
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66 MFORM *new_mform;
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67 int i;
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68
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69 #ifdef DEBUG_VIDEO_GEM
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70 Uint16 *data1, *mask1;
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71
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72 printf("sdl:video:gem: create cursor\n");
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73 #endif
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74
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75 /* Check the size */
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76 if ( (w > MAXCURWIDTH) || (h > MAXCURHEIGHT) ) {
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77 SDL_SetError("Only cursors of dimension (%dx%d) are allowed",
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78 MAXCURWIDTH, MAXCURHEIGHT);
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79 return(NULL);
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80 }
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81
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82 /* Allocate the cursor memory */
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83 cursor = (WMcursor *)SDL_malloc(sizeof(WMcursor));
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84 if ( cursor == NULL ) {
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85 SDL_OutOfMemory();
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86 return(NULL);
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87 }
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88
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89 /* Allocate mform */
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90 new_mform = (MFORM *)SDL_malloc(sizeof(MFORM));
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91 if (new_mform == NULL) {
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92 SDL_free(cursor);
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93 SDL_OutOfMemory();
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94 return(NULL);
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95 }
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96
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97 cursor->mform_p = new_mform;
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98
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99 new_mform->mf_xhot = hot_x;
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100 new_mform->mf_yhot = hot_y;
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101 new_mform->mf_nplanes = 1;
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102 new_mform->mf_fg = 0;
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103 new_mform->mf_bg = 1;
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104
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105 for (i=0;i<MAXCURHEIGHT;i++) {
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106 new_mform->mf_mask[i]=0;
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107 new_mform->mf_data[i]=0;
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108 #ifdef DEBUG_VIDEO_GEM
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109 data1 = (Uint16 *) &data[i<<1];
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110 mask1 = (Uint16 *) &mask[i<<1];
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111 printf("sdl:video:gem: source: line %d: data=0x%04x, mask=0x%04x\n",
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112 i, data1[i], mask1[i]);
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113 #endif
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114 }
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115
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116 if (w<=8) {
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117 for (i=0;i<h;i++) {
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118 new_mform->mf_mask[i]= mask[i]<<8;
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119 new_mform->mf_data[i]= data[i]<<8;
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120 }
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121 } else {
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122 for (i=0;i<h;i++) {
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123 new_mform->mf_mask[i]= (mask[i<<1]<<8) | mask[(i<<1)+1];
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124 new_mform->mf_data[i]= (data[i<<1]<<8) | data[(i<<1)+1];
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125 }
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126 }
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127
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128 #ifdef DEBUG_VIDEO_GEM
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129 for (i=0; i<h ;i++) {
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130 printf("sdl:video:gem: cursor: line %d: data=0x%04x, mask=0x%04x\n",
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131 i, new_mform->mf_data[i], new_mform->mf_mask[i]);
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132 }
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133
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134 printf("sdl:video:gem: CreateWMCursor(): done\n");
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135 #endif
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136
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137 return cursor;
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138 }
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139
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140 int GEM_ShowWMCursor(_THIS, WMcursor *cursor)
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141 {
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142 GEM_cursor = cursor;
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143
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144 GEM_CheckMouseMode(this);
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145
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146 #ifdef DEBUG_VIDEO_GEM
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147 printf("sdl:video:gem: ShowWMCursor(0x%08x)\n", (long) cursor);
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148 #endif
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149
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150 return 1;
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151 }
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152
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153 #if 0
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154 void GEM_WarpWMCursor(_THIS, Uint16 x, Uint16 y)
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155 {
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156 /* This seems to work only on AES 3.4 (Falcon) */
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157
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158 EVNTREC warpevent;
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159
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160 warpevent.ap_event = APPEVNT_MOUSE;
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161 warpevent.ap_value = (x << 16) | y;
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162
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163 appl_tplay(&warpevent, 1, 1000);
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164 }
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165 #endif
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166
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167 void GEM_CheckMouseMode(_THIS)
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168 {
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169 const Uint8 full_focus = (SDL_APPACTIVE|SDL_APPINPUTFOCUS|SDL_APPMOUSEFOCUS);
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170 int set_system_cursor = 1, show_system_cursor = 1;
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171
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172 #ifdef DEBUG_VIDEO_GEM
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173 printf("sdl:video:gem: check mouse mode\n");
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174 #endif
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175
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176 /* If the mouse is hidden and input is grabbed, we use relative mode */
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177 GEM_mouse_relative = (!(SDL_cursorstate & CURSOR_VISIBLE))
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178 && (this->input_grab != SDL_GRAB_OFF)
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179 && (SDL_GetAppState() & SDL_APPACTIVE);
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180 SDL_AtariXbios_LockMousePosition(GEM_mouse_relative);
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181
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182 if (SDL_cursorstate & CURSOR_VISIBLE) {
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183 /* Application defined cursor only over the application window */
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184 if ((SDL_GetAppState() & full_focus) == full_focus) {
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185 if (GEM_cursor) {
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186 graf_mouse(USER_DEF, GEM_cursor->mform_p);
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187 set_system_cursor = 0;
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188 } else {
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189 show_system_cursor = 0;
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190 }
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191 }
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192 } else {
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193 /* Mouse cursor hidden only over the application window */
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194 if ((SDL_GetAppState() & full_focus) == full_focus) {
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195 set_system_cursor = 0;
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196 show_system_cursor = 0;
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197 }
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198 }
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199
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200 graf_mouse(show_system_cursor ? M_ON : M_OFF, NULL);
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201 if (set_system_cursor) {
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202 graf_mouse(ARROW, NULL);
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203 }
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204 }