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annotate src/video/x11/SDL_x11mouse.c @ 1895:c121d94672cb

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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
author Sam Lantinga <slouken@libsdl.org>
date Mon, 10 Jul 2006 21:04:37 +0000
parents db7e15a99cb3
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) 1997-2006 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 {
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37 Cursor x_cursor;
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38 };
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39
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40
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41 void
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42 X11_FreeWMCursor(_THIS, WMcursor * cursor)
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43 {
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44 if (SDL_Display != NULL) {
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45 SDL_Lock_EventThread();
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46 XFreeCursor(SDL_Display, cursor->x_cursor);
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47 XSync(SDL_Display, False);
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48 SDL_Unlock_EventThread();
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49 }
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50 SDL_free(cursor);
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51 }
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52
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53 WMcursor *
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54 X11_CreateWMCursor(_THIS,
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55 Uint8 * data, Uint8 * mask, int w, int h, int hot_x,
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56 int hot_y)
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57 {
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58 WMcursor *cursor;
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59 XGCValues GCvalues;
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60 GC GCcursor;
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61 XImage *data_image, *mask_image;
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62 Pixmap data_pixmap, mask_pixmap;
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63 int clen, i;
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64 char *x_data, *x_mask;
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65 static XColor black = { 0, 0, 0, 0 };
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66 static XColor white = { 0xffff, 0xffff, 0xffff, 0xffff };
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67
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68 /* Allocate the cursor memory */
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69 cursor = (WMcursor *) SDL_malloc(sizeof(WMcursor));
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70 if (cursor == NULL) {
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71 SDL_OutOfMemory();
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72 return (NULL);
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73 }
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74
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75 /* Mix the mask and the data */
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76 clen = (w / 8) * h;
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77 x_data = (char *) SDL_malloc(clen);
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78 if (x_data == NULL) {
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79 SDL_free(cursor);
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80 SDL_OutOfMemory();
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81 return (NULL);
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82 }
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83 x_mask = (char *) SDL_malloc(clen);
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84 if (x_mask == NULL) {
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85 SDL_free(cursor);
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86 SDL_free(x_data);
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87 SDL_OutOfMemory();
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88 return (NULL);
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89 }
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90 for (i = 0; i < clen; ++i) {
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91 /* The mask is OR'd with the data to turn inverted color
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92 pixels black since inverted color cursors aren't supported
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93 under X11.
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94 */
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95 x_mask[i] = data[i] | mask[i];
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96 x_data[i] = data[i];
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97 }
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98
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99 /* Prevent the event thread from running while we use the X server */
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100 SDL_Lock_EventThread();
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101
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102 /* Create the data image */
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103 data_image = XCreateImage(SDL_Display,
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104 DefaultVisual(SDL_Display, SDL_Screen),
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105 1, XYBitmap, 0, x_data, w, h, 8, w / 8);
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106 data_image->byte_order = MSBFirst;
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107 data_image->bitmap_bit_order = MSBFirst;
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108 data_pixmap = XCreatePixmap(SDL_Display, SDL_Root, w, h, 1);
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109
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110 /* Create the data mask */
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111 mask_image = XCreateImage(SDL_Display,
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112 DefaultVisual(SDL_Display, SDL_Screen),
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113 1, XYBitmap, 0, x_mask, w, h, 8, w / 8);
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114 mask_image->byte_order = MSBFirst;
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115 mask_image->bitmap_bit_order = MSBFirst;
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116 mask_pixmap = XCreatePixmap(SDL_Display, SDL_Root, w, h, 1);
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117
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118 /* Create the graphics context */
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119 GCvalues.function = GXcopy;
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120 GCvalues.foreground = ~0;
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121 GCvalues.background = 0;
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122 GCvalues.plane_mask = AllPlanes;
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123 GCcursor = XCreateGC(SDL_Display, data_pixmap,
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124 (GCFunction | GCForeground | GCBackground |
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125 GCPlaneMask), &GCvalues);
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126
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127 /* Blit the images to the pixmaps */
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128 XPutImage(SDL_Display, data_pixmap, GCcursor, data_image,
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129 0, 0, 0, 0, w, h);
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130 XPutImage(SDL_Display, mask_pixmap, GCcursor, mask_image,
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131 0, 0, 0, 0, w, h);
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132 XFreeGC(SDL_Display, GCcursor);
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133 /* These free the x_data and x_mask memory pointers */
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134 XDestroyImage(data_image);
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135 XDestroyImage(mask_image);
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136
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137 /* Create the cursor */
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138 cursor->x_cursor = XCreatePixmapCursor(SDL_Display, data_pixmap,
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139 mask_pixmap, &black, &white,
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140 hot_x, hot_y);
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141 XFreePixmap(SDL_Display, data_pixmap);
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142 XFreePixmap(SDL_Display, mask_pixmap);
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143
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144 /* Release the event thread */
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145 XSync(SDL_Display, False);
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146 SDL_Unlock_EventThread();
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147
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148 return (cursor);
0
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149 }
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150
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151 int
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152 X11_ShowWMCursor(_THIS, WMcursor * cursor)
0
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153 {
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154 /* Don't do anything if the display is gone */
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155 if (SDL_Display == NULL) {
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156 return (0);
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157 }
0
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158
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159 /* Set the X11 cursor cursor, or blank if cursor is NULL */
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160 if (SDL_Window) {
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161 SDL_Lock_EventThread();
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162 if (cursor == NULL) {
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163 if (SDL_BlankCursor != NULL) {
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164 XDefineCursor(SDL_Display, SDL_Window,
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165 SDL_BlankCursor->x_cursor);
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166 }
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167 } else {
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168 XDefineCursor(SDL_Display, SDL_Window, cursor->x_cursor);
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169 }
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170 XSync(SDL_Display, False);
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171 SDL_Unlock_EventThread();
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172 }
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173 return (1);
0
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174 }
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175
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176 void
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177 X11_WarpWMCursor(_THIS, Uint16 x, Uint16 y)
0
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178 {
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179 if (using_dga & DGA_MOUSE) {
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180 SDL_PrivateMouseMotion(0, 0, x, y);
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181 } else if (mouse_relative) {
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182 /* RJR: March 28, 2000
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183 leave physical cursor at center of screen if
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184 mouse hidden and grabbed */
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185 SDL_PrivateMouseMotion(0, 0, x, y);
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186 } else {
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187 SDL_Lock_EventThread();
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188 XWarpPointer(SDL_Display, None, SDL_Window, 0, 0, 0, 0, x, y);
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189 XSync(SDL_Display, False);
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190 SDL_Unlock_EventThread();
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191 }
0
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192 }
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193
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194 /* Sets the mouse acceleration from a string of the form:
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195 2/1/0
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196 The first number is the numerator, followed by the acceleration
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197 denumenator and threshold.
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198 */
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199 static void
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200 SetMouseAccel(_THIS, const char *accel_param)
0
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201 {
1895
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202 int i;
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203 size_t len;
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204 int accel_value[3];
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205 char *mouse_param, *mouse_param_buf, *pin;
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206
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207 len = SDL_strlen(accel_param) + 1;
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208 mouse_param_buf = SDL_stack_alloc(char, len);
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209 if (!mouse_param_buf) {
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210 return;
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211 }
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212 SDL_strlcpy(mouse_param_buf, accel_param, len);
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213 mouse_param = mouse_param_buf;
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214
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215 for (i = 0; (i < 3) && mouse_param; ++i) {
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216 pin = SDL_strchr(mouse_param, '/');
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217 if (pin) {
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218 *pin = '\0';
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219 }
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220 accel_value[i] = atoi(mouse_param);
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221 if (pin) {
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222 mouse_param = pin + 1;
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223 } else {
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224 mouse_param = NULL;
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225 }
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226 }
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227 if (mouse_param_buf) {
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228 XChangePointerControl(SDL_Display, True, True,
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229 accel_value[0], accel_value[1], accel_value[2]);
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230 SDL_free(mouse_param_buf);
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231 }
0
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232 }
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233
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234 /* Check to see if we need to enter or leave mouse relative mode */
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235 void
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236 X11_CheckMouseModeNoLock(_THIS)
0
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237 {
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238 const Uint8 full_focus =
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239 (SDL_APPACTIVE | SDL_APPINPUTFOCUS | SDL_APPMOUSEFOCUS);
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240 char *env_override;
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241 int enable_relative = 1;
79
ffadd05de74d Allow the user to override the relative mouse mode.
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diff changeset
242
1895
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243 /* Allow the user to override the relative mouse mode.
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244 They almost never want to do this, as it seriously affects
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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245 applications that rely on continuous relative mouse motion.
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diff changeset
246 */
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diff changeset
247 env_override = SDL_getenv("SDL_MOUSE_RELATIVE");
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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248 if (env_override) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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249 enable_relative = atoi(env_override);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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250 }
79
ffadd05de74d Allow the user to override the relative mouse mode.
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parents: 78
diff changeset
251
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
252 /* If the mouse is hidden and input is grabbed, we use relative mode */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
253 if (enable_relative &&
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diff changeset
254 !(SDL_cursorstate & CURSOR_VISIBLE) &&
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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255 (SDL_CurrentWindow.input_grab != SDL_GRAB_OFF) &&
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
256 (SDL_GetAppState() & full_focus) == full_focus) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
257 if (!mouse_relative) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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258 X11_EnableDGAMouse(this);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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259 if (!(using_dga & DGA_MOUSE)) {
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260 char *xmouse_accel;
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261
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262 SDL_GetMouseState(&mouse_last.x, &mouse_last.y);
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263 /* Use as raw mouse mickeys as possible */
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264 XGetPointerControl(SDL_Display,
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265 &mouse_accel.numerator,
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266 &mouse_accel.denominator,
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267 &mouse_accel.threshold);
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268 xmouse_accel = SDL_getenv("SDL_VIDEO_X11_MOUSEACCEL");
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269 if (xmouse_accel) {
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270 SetMouseAccel(this, xmouse_accel);
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271 }
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272 }
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273 mouse_relative = 1;
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274 }
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275 } else {
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276 if (mouse_relative) {
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277 if (using_dga & DGA_MOUSE) {
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278 X11_DisableDGAMouse(this);
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279 } else {
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280 XChangePointerControl(SDL_Display, True, True,
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281 mouse_accel.numerator,
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282 mouse_accel.denominator,
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283 mouse_accel.threshold);
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284 }
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285 mouse_relative = 0;
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286 }
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287 }
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288 }
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289 void
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290 X11_CheckMouseMode(_THIS)
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291 {
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292 SDL_Lock_EventThread();
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293 X11_CheckMouseModeNoLock(this);
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294 SDL_Unlock_EventThread();
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295 }
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296
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297 /* vi: set ts=4 sw=4 expandtab: */