annotate src/video/x11/SDL_x11mouse.c @ 1358:c71e05b4dc2e

More header massaging... works great on Windows. ;-)
author Sam Lantinga <slouken@libsdl.org>
date Fri, 10 Feb 2006 06:48:43 +0000
parents 604d73db6802
children 19418e4422cb
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
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23 #include <X11/Xlib.h>
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24 #include <X11/Xutil.h>
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25
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26 #include "SDL_mouse.h"
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27 #include "SDL_events_c.h"
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28 #include "SDL_cursor_c.h"
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29 #include "SDL_x11dga_c.h"
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30 #include "SDL_x11mouse_c.h"
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31
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32
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33 /* The implementation dependent data for the window manager cursor */
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34 struct WMcursor {
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35 Cursor x_cursor;
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36 };
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37
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38
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39 void X11_FreeWMCursor(_THIS, WMcursor *cursor)
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40 {
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41 if ( SDL_Display != NULL ) {
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42 SDL_Lock_EventThread();
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43 pXFreeCursor(SDL_Display, cursor->x_cursor);
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44 pXSync(SDL_Display, False);
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45 SDL_Unlock_EventThread();
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46 }
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47 SDL_free(cursor);
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48 }
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49
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50 WMcursor *X11_CreateWMCursor(_THIS,
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51 Uint8 *data, Uint8 *mask, int w, int h, int hot_x, int hot_y)
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52 {
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53 WMcursor *cursor;
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54 XGCValues GCvalues;
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55 GC GCcursor;
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56 XImage *data_image, *mask_image;
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57 Pixmap data_pixmap, mask_pixmap;
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58 int clen, i;
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59 char *x_data, *x_mask;
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60 static XColor black = { 0, 0, 0, 0 };
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61 static XColor white = { 0xffff, 0xffff, 0xffff, 0xffff };
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62
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63 /* Allocate the cursor memory */
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64 cursor = (WMcursor *)SDL_malloc(sizeof(WMcursor));
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65 if ( cursor == NULL ) {
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66 SDL_OutOfMemory();
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67 return(NULL);
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68 }
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69
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70 /* Mix the mask and the data */
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71 clen = (w/8)*h;
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72 x_data = (char *)SDL_malloc(clen);
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73 if ( x_data == NULL ) {
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74 SDL_free(cursor);
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75 SDL_OutOfMemory();
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76 return(NULL);
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77 }
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78 x_mask = (char *)SDL_malloc(clen);
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79 if ( x_mask == NULL ) {
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80 SDL_free(cursor);
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81 SDL_free(x_data);
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82 SDL_OutOfMemory();
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83 return(NULL);
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84 }
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85 for ( i=0; i<clen; ++i ) {
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86 /* The mask is OR'd with the data to turn inverted color
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87 pixels black since inverted color cursors aren't supported
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88 under X11.
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89 */
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90 x_mask[i] = data[i] | mask[i];
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91 x_data[i] = data[i];
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92 }
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93
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94 /* Prevent the event thread from running while we use the X server */
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95 SDL_Lock_EventThread();
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96
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97 /* Create the data image */
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98 data_image = pXCreateImage(SDL_Display,
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99 DefaultVisual(SDL_Display, SDL_Screen),
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100 1, XYBitmap, 0, x_data, w, h, 8, w/8);
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101 data_image->byte_order = MSBFirst;
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102 data_image->bitmap_bit_order = MSBFirst;
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103 data_pixmap = pXCreatePixmap(SDL_Display, SDL_Root, w, h, 1);
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104
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105 /* Create the data mask */
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106 mask_image = pXCreateImage(SDL_Display,
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107 DefaultVisual(SDL_Display, SDL_Screen),
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108 1, XYBitmap, 0, x_mask, w, h, 8, w/8);
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109 mask_image->byte_order = MSBFirst;
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110 mask_image->bitmap_bit_order = MSBFirst;
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111 mask_pixmap = pXCreatePixmap(SDL_Display, SDL_Root, w, h, 1);
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112
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113 /* Create the graphics context */
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114 GCvalues.function = GXcopy;
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115 GCvalues.foreground = ~0;
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116 GCvalues.background = 0;
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117 GCvalues.plane_mask = AllPlanes;
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118 GCcursor = pXCreateGC(SDL_Display, data_pixmap,
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119 (GCFunction|GCForeground|GCBackground|GCPlaneMask),
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120 &GCvalues);
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121
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122 /* Blit the images to the pixmaps */
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123 pXPutImage(SDL_Display, data_pixmap, GCcursor, data_image,
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124 0, 0, 0, 0, w, h);
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125 pXPutImage(SDL_Display, mask_pixmap, GCcursor, mask_image,
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126 0, 0, 0, 0, w, h);
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127 pXFreeGC(SDL_Display, GCcursor);
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128 /* These free the x_data and x_mask memory pointers */
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129 pXDestroyImage(data_image);
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130 pXDestroyImage(mask_image);
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131
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132 /* Create the cursor */
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133 cursor->x_cursor = pXCreatePixmapCursor(SDL_Display, data_pixmap,
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134 mask_pixmap, &black, &white, hot_x, hot_y);
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135 pXFreePixmap(SDL_Display, data_pixmap);
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136 pXFreePixmap(SDL_Display, mask_pixmap);
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137
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138 /* Release the event thread */
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139 pXSync(SDL_Display, False);
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140 SDL_Unlock_EventThread();
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141
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142 return(cursor);
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143 }
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144
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145 int X11_ShowWMCursor(_THIS, WMcursor *cursor)
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146 {
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147 /* Don't do anything if the display is gone */
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148 if ( SDL_Display == NULL ) {
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149 return(0);
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150 }
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151
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152 /* Set the X11 cursor cursor, or blank if cursor is NULL */
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153 if ( SDL_Window ) {
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154 SDL_Lock_EventThread();
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155 if ( cursor == NULL ) {
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156 if ( SDL_BlankCursor != NULL ) {
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157 pXDefineCursor(SDL_Display, SDL_Window,
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158 SDL_BlankCursor->x_cursor);
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159 }
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160 } else {
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161 pXDefineCursor(SDL_Display, SDL_Window, cursor->x_cursor);
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162 }
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163 pXSync(SDL_Display, False);
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164 SDL_Unlock_EventThread();
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165 }
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166 return(1);
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167 }
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168
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169 void X11_WarpWMCursor(_THIS, Uint16 x, Uint16 y)
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170 {
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171 if ( using_dga & DGA_MOUSE ) {
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172 SDL_PrivateMouseMotion(0, 0, x, y);
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173 } else if ( mouse_relative) {
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174 /* RJR: March 28, 2000
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175 leave physical cursor at center of screen if
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176 mouse hidden and grabbed */
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177 SDL_PrivateMouseMotion(0, 0, x, y);
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178 } else {
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179 SDL_Lock_EventThread();
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180 pXWarpPointer(SDL_Display, None, SDL_Window, 0, 0, 0, 0, x, y);
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181 pXSync(SDL_Display, False);
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182 SDL_Unlock_EventThread();
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183 }
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184 }
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185
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186 /* Sets the mouse acceleration from a string of the form:
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187 2/1/0
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188 The first number is the numerator, followed by the acceleration
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189 denumenator and threshold.
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190 */
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191 static void SetMouseAccel(_THIS, const char *accel_param)
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192 {
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193 int i;
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194 int accel_value[3];
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195 char *mouse_param, *mouse_param_buf, *pin;
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196
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197 mouse_param_buf = (char *)SDL_malloc(SDL_strlen(accel_param)+1);
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198 if ( ! mouse_param_buf ) {
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199 return;
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200 }
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201 SDL_strcpy(mouse_param_buf, accel_param);
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202 mouse_param = mouse_param_buf;
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203
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204 for ( i=0; (i < 3) && mouse_param; ++i ) {
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205 pin = SDL_strchr(mouse_param, '/');
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206 if ( pin ) {
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207 *pin = '\0';
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208 }
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209 accel_value[i] = atoi(mouse_param);
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210 if ( pin ) {
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211 mouse_param = pin+1;
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212 } else {
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213 mouse_param = NULL;
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214 }
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215 }
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216 if ( mouse_param_buf ) {
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217 pXChangePointerControl(SDL_Display, True, True,
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218 accel_value[0], accel_value[1], accel_value[2]);
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219 SDL_free(mouse_param_buf);
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220 }
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221 }
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222
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223 /* Check to see if we need to enter or leave mouse relative mode */
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224 void X11_CheckMouseModeNoLock(_THIS)
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225 {
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226 char *env_override;
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227 int enable_relative = 1;
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228
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229 /* Allow the user to override the relative mouse mode.
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230 They almost never want to do this, as it seriously affects
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231 applications that rely on continuous relative mouse motion.
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232 */
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233 env_override = SDL_getenv("SDL_MOUSE_RELATIVE");
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234 if ( env_override ) {
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235 enable_relative = atoi(env_override);
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236 }
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237
0
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238 /* If the mouse is hidden and input is grabbed, we use relative mode */
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239 if ( enable_relative &&
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240 !(SDL_cursorstate & CURSOR_VISIBLE) &&
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241 (this->input_grab != SDL_GRAB_OFF) &&
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242 (SDL_GetAppState() & SDL_APPACTIVE) ) {
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243 if ( ! mouse_relative ) {
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244 X11_EnableDGAMouse(this);
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245 if ( ! (using_dga & DGA_MOUSE) ) {
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246 char *xmouse_accel;
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247
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248 SDL_GetMouseState(&mouse_last.x, &mouse_last.y);
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249 /* Use as raw mouse mickeys as possible */
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250 pXGetPointerControl(SDL_Display,
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251 &mouse_accel.numerator,
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252 &mouse_accel.denominator,
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253 &mouse_accel.threshold);
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254 xmouse_accel=SDL_getenv("SDL_VIDEO_X11_MOUSEACCEL");
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255 if ( xmouse_accel ) {
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256 SetMouseAccel(this, xmouse_accel);
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257 }
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258 }
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259 mouse_relative = 1;
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260 }
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261 } else {
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262 if ( mouse_relative ) {
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263 if ( using_dga & DGA_MOUSE ) {
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264 X11_DisableDGAMouse(this);
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265 } else {
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266 pXChangePointerControl(SDL_Display, True, True,
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267 mouse_accel.numerator,
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268 mouse_accel.denominator,
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269 mouse_accel.threshold);
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270 }
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271 mouse_relative = 0;
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272 }
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273 }
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274 }
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275 void X11_CheckMouseMode(_THIS)
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276 {
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277 SDL_Lock_EventThread();
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278 X11_CheckMouseModeNoLock(this);
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279 SDL_Unlock_EventThread();
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280 }