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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 <X11/Xlib.h> |
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25 #include <X11/Xutil.h> |
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26 |
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27 #include "SDL_mouse.h" |
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28 #include "../../events/SDL_events_c.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 #include "SDL_x11mouse_c.h" |
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32 |
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33 |
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34 /* The implementation dependent data for the window manager cursor */ |
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35 struct WMcursor { |
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36 Cursor x_cursor; |
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37 }; |
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38 |
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39 |
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40 void X11_FreeWMCursor(_THIS, WMcursor *cursor) |
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41 { |
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42 if ( SDL_Display != NULL ) { |
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43 SDL_Lock_EventThread(); |
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44 XFreeCursor(SDL_Display, cursor->x_cursor); |
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45 XSync(SDL_Display, False); |
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46 SDL_Unlock_EventThread(); |
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47 } |
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48 SDL_free(cursor); |
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49 } |
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50 |
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51 WMcursor *X11_CreateWMCursor(_THIS, |
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52 Uint8 *data, Uint8 *mask, int w, int h, int hot_x, int hot_y) |
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53 { |
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54 WMcursor *cursor; |
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55 XGCValues GCvalues; |
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56 GC GCcursor; |
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57 XImage *data_image, *mask_image; |
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58 Pixmap data_pixmap, mask_pixmap; |
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59 int clen, i; |
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60 char *x_data, *x_mask; |
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61 static XColor black = { 0, 0, 0, 0 }; |
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62 static XColor white = { 0xffff, 0xffff, 0xffff, 0xffff }; |
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63 |
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64 /* Allocate the cursor memory */ |
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65 cursor = (WMcursor *)SDL_malloc(sizeof(WMcursor)); |
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66 if ( cursor == NULL ) { |
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67 SDL_OutOfMemory(); |
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68 return(NULL); |
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69 } |
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70 |
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71 /* Mix the mask and the data */ |
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72 clen = (w/8)*h; |
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73 x_data = (char *)SDL_malloc(clen); |
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74 if ( x_data == NULL ) { |
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75 SDL_free(cursor); |
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76 SDL_OutOfMemory(); |
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77 return(NULL); |
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78 } |
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79 x_mask = (char *)SDL_malloc(clen); |
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80 if ( x_mask == NULL ) { |
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81 SDL_free(cursor); |
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82 SDL_free(x_data); |
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83 SDL_OutOfMemory(); |
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84 return(NULL); |
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85 } |
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86 for ( i=0; i<clen; ++i ) { |
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87 /* The mask is OR'd with the data to turn inverted color |
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88 pixels black since inverted color cursors aren't supported |
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89 under X11. |
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90 */ |
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91 x_mask[i] = data[i] | mask[i]; |
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92 x_data[i] = data[i]; |
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93 } |
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94 |
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95 /* Prevent the event thread from running while we use the X server */ |
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96 SDL_Lock_EventThread(); |
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97 |
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98 /* Create the data image */ |
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99 data_image = XCreateImage(SDL_Display, |
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100 DefaultVisual(SDL_Display, SDL_Screen), |
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101 1, XYBitmap, 0, x_data, w, h, 8, w/8); |
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102 data_image->byte_order = MSBFirst; |
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103 data_image->bitmap_bit_order = MSBFirst; |
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104 data_pixmap = XCreatePixmap(SDL_Display, SDL_Root, w, h, 1); |
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105 |
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106 /* Create the data mask */ |
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107 mask_image = XCreateImage(SDL_Display, |
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108 DefaultVisual(SDL_Display, SDL_Screen), |
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109 1, XYBitmap, 0, x_mask, w, h, 8, w/8); |
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110 mask_image->byte_order = MSBFirst; |
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111 mask_image->bitmap_bit_order = MSBFirst; |
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112 mask_pixmap = XCreatePixmap(SDL_Display, SDL_Root, w, h, 1); |
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113 |
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114 /* Create the graphics context */ |
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115 GCvalues.function = GXcopy; |
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116 GCvalues.foreground = ~0; |
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117 GCvalues.background = 0; |
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118 GCvalues.plane_mask = AllPlanes; |
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119 GCcursor = XCreateGC(SDL_Display, data_pixmap, |
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120 (GCFunction|GCForeground|GCBackground|GCPlaneMask), |
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121 &GCvalues); |
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122 |
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123 /* Blit the images to the pixmaps */ |
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124 XPutImage(SDL_Display, data_pixmap, GCcursor, data_image, |
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125 0, 0, 0, 0, w, h); |
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126 XPutImage(SDL_Display, mask_pixmap, GCcursor, mask_image, |
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127 0, 0, 0, 0, w, h); |
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128 XFreeGC(SDL_Display, GCcursor); |
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129 /* These free the x_data and x_mask memory pointers */ |
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130 XDestroyImage(data_image); |
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131 XDestroyImage(mask_image); |
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132 |
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133 /* Create the cursor */ |
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134 cursor->x_cursor = XCreatePixmapCursor(SDL_Display, data_pixmap, |
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135 mask_pixmap, &black, &white, hot_x, hot_y); |
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136 XFreePixmap(SDL_Display, data_pixmap); |
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137 XFreePixmap(SDL_Display, mask_pixmap); |
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138 |
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139 /* Release the event thread */ |
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140 XSync(SDL_Display, False); |
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141 SDL_Unlock_EventThread(); |
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142 |
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143 return(cursor); |
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144 } |
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145 |
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146 int X11_ShowWMCursor(_THIS, WMcursor *cursor) |
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147 { |
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148 /* Don't do anything if the display is gone */ |
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149 if ( SDL_Display == NULL ) { |
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150 return(0); |
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151 } |
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152 |
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153 /* Set the X11 cursor cursor, or blank if cursor is NULL */ |
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154 if ( SDL_Window ) { |
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155 SDL_Lock_EventThread(); |
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156 if ( cursor == NULL ) { |
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157 if ( SDL_BlankCursor != NULL ) { |
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158 XDefineCursor(SDL_Display, SDL_Window, |
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159 SDL_BlankCursor->x_cursor); |
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160 } |
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161 } else { |
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162 XDefineCursor(SDL_Display, SDL_Window, cursor->x_cursor); |
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163 } |
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164 XSync(SDL_Display, False); |
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165 SDL_Unlock_EventThread(); |
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166 } |
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167 return(1); |
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168 } |
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169 |
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170 void X11_WarpWMCursor(_THIS, Uint16 x, Uint16 y) |
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171 { |
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172 if ( using_dga & DGA_MOUSE ) { |
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173 SDL_PrivateMouseMotion(0, 0, x, y); |
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174 } else if ( mouse_relative) { |
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175 /* RJR: March 28, 2000 |
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176 leave physical cursor at center of screen if |
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177 mouse hidden and grabbed */ |
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178 SDL_PrivateMouseMotion(0, 0, x, y); |
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179 } else { |
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180 SDL_Lock_EventThread(); |
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181 XWarpPointer(SDL_Display, None, SDL_Window, 0, 0, 0, 0, x, y); |
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182 XSync(SDL_Display, False); |
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183 SDL_Unlock_EventThread(); |
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184 } |
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185 } |
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186 |
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187 /* Sets the mouse acceleration from a string of the form: |
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188 2/1/0 |
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189 The first number is the numerator, followed by the acceleration |
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190 denumenator and threshold. |
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191 */ |
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192 static void SetMouseAccel(_THIS, const char *accel_param) |
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193 { |
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194 int i; |
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195 size_t len; |
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196 int accel_value[3]; |
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197 char *mouse_param, *mouse_param_buf, *pin; |
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198 |
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199 len = SDL_strlen(accel_param)+1; |
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200 mouse_param_buf = SDL_stack_alloc(char, len); |
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201 if ( ! mouse_param_buf ) { |
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202 return; |
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203 } |
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204 SDL_strlcpy(mouse_param_buf, accel_param, len); |
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205 mouse_param = mouse_param_buf; |
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206 |
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207 for ( i=0; (i < 3) && mouse_param; ++i ) { |
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208 pin = SDL_strchr(mouse_param, '/'); |
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209 if ( pin ) { |
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210 *pin = '\0'; |
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211 } |
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212 accel_value[i] = atoi(mouse_param); |
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213 if ( pin ) { |
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214 mouse_param = pin+1; |
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215 } else { |
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216 mouse_param = NULL; |
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217 } |
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218 } |
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219 if ( i == 3 ) { |
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220 XChangePointerControl(SDL_Display, True, True, |
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221 accel_value[0], accel_value[1], accel_value[2]); |
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222 } |
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223 SDL_stack_free(mouse_param_buf); |
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224 } |
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225 |
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226 /* Check to see if we need to enter or leave mouse relative mode */ |
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227 void X11_CheckMouseModeNoLock(_THIS) |
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228 { |
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229 const Uint8 full_focus = (SDL_APPACTIVE|SDL_APPINPUTFOCUS|SDL_APPMOUSEFOCUS); |
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230 char *env_override; |
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231 int enable_relative = 1; |
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232 |
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233 /* Allow the user to override the relative mouse mode. |
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234 They almost never want to do this, as it seriously affects |
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235 applications that rely on continuous relative mouse motion. |
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236 */ |
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237 env_override = SDL_getenv("SDL_MOUSE_RELATIVE"); |
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238 if ( env_override ) { |
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239 enable_relative = atoi(env_override); |
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240 } |
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241 |
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242 /* If the mouse is hidden and input is grabbed, we use relative mode */ |
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243 if ( enable_relative && |
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244 !(SDL_cursorstate & CURSOR_VISIBLE) && |
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245 (this->input_grab != SDL_GRAB_OFF) && |
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246 (SDL_GetAppState() & full_focus) == full_focus ) { |
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247 if ( ! mouse_relative ) { |
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248 X11_EnableDGAMouse(this); |
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249 if ( ! (using_dga & DGA_MOUSE) ) { |
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250 char *xmouse_accel; |
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251 |
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252 SDL_GetMouseState(&mouse_last.x, &mouse_last.y); |
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253 /* Use as raw mouse mickeys as possible */ |
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254 XGetPointerControl(SDL_Display, |
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255 &mouse_accel.numerator, |
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256 &mouse_accel.denominator, |
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257 &mouse_accel.threshold); |
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258 xmouse_accel=SDL_getenv("SDL_VIDEO_X11_MOUSEACCEL"); |
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259 if ( xmouse_accel ) { |
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260 SetMouseAccel(this, xmouse_accel); |
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261 } |
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262 } |
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263 mouse_relative = 1; |
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264 } |
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265 } else { |
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266 if ( mouse_relative ) { |
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267 if ( using_dga & DGA_MOUSE ) { |
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268 X11_DisableDGAMouse(this); |
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269 } else { |
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270 XChangePointerControl(SDL_Display, True, True, |
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271 mouse_accel.numerator, |
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272 mouse_accel.denominator, |
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273 mouse_accel.threshold); |
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274 } |
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275 mouse_relative = 0; |
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276 } |
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277 } |
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278 } |
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279 void X11_CheckMouseMode(_THIS) |
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280 { |
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281 SDL_Lock_EventThread(); |
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282 X11_CheckMouseModeNoLock(this); |
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283 SDL_Unlock_EventThread(); |
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284 } |