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annotate src/video/directfb/SDL_DirectFB_mouse.c @ 4832:0c82f20327ec

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Correcting minor bugs and adding assertions to help me track down a NULL pointer bug in Cocoa code.
author egottlieb
date Thu, 05 Aug 2010 00:53:38 -0400
parents f7b03b6838cb
children 25b9cd8bdc30
rev   line source
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Sam Lantinga <slouken@libsdl.org>
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1 /*
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2 SDL - Simple DirectMedia Layer
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f7b03b6838cb Fixed bug #926
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3 Copyright (C) 1997-2010 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 "SDL_DirectFB_video.h"
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25
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26 #include "../SDL_sysvideo.h"
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27 #include "../../events/SDL_mouse_c.h"
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28
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29 static SDL_Cursor *DirectFB_CreateCursor(SDL_Surface * surface,
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30 int hot_x, int hot_y);
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31 static int DirectFB_ShowCursor(SDL_Cursor * cursor);
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32 static void DirectFB_MoveCursor(SDL_Cursor * cursor);
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33 static void DirectFB_FreeCursor(SDL_Cursor * cursor);
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34 static void DirectFB_WarpMouse(SDL_Mouse * mouse, SDL_Window * window,
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35 int x, int y);
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36 static void DirectFB_FreeMouse(SDL_Mouse * mouse);
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37
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38 static int id_mask;
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39
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40 static DFBEnumerationResult
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41 EnumMice(DFBInputDeviceID device_id, DFBInputDeviceDescription desc,
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42 void *callbackdata)
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43 {
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44 DFB_DeviceData *devdata = callbackdata;
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45
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46 if ((desc.type & DIDTF_MOUSE) && (device_id & id_mask)) {
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47 SDL_Mouse mouse;
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48
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49 SDL_zero(mouse);
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50 mouse.id = device_id;
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51 mouse.CreateCursor = DirectFB_CreateCursor;
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52 mouse.ShowCursor = DirectFB_ShowCursor;
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53 mouse.MoveCursor = DirectFB_MoveCursor;
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54 mouse.FreeCursor = DirectFB_FreeCursor;
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55 mouse.WarpMouse = DirectFB_WarpMouse;
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56 mouse.FreeMouse = DirectFB_FreeMouse;
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57 mouse.cursor_shown = 1;
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58
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59 SDL_AddMouse(&mouse, desc.name, 0, 0, 1);
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60 devdata->mouse_id[devdata->num_mice++] = device_id;
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61 }
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62 return DFENUM_OK;
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63 }
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64
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65 void
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66 DirectFB_InitMouse(_THIS)
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67 {
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68 SDL_DFB_DEVICEDATA(_this);
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69
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70 devdata->num_mice = 0;
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71 if (devdata->use_linux_input) {
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72 /* try non-core devices first */
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73 id_mask = 0xF0;
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74 devdata->dfb->EnumInputDevices(devdata->dfb, EnumMice, devdata);
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75 if (devdata->num_mice == 0) {
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76 /* try core devices */
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77 id_mask = 0x0F;
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78 devdata->dfb->EnumInputDevices(devdata->dfb, EnumMice, devdata);
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79 }
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80 }
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81 if (devdata->num_mice == 0) {
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82 SDL_Mouse mouse;
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83
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84 SDL_zero(mouse);
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85 mouse.CreateCursor = DirectFB_CreateCursor;
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86 mouse.ShowCursor = DirectFB_ShowCursor;
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87 mouse.MoveCursor = DirectFB_MoveCursor;
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88 mouse.FreeCursor = DirectFB_FreeCursor;
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89 mouse.WarpMouse = DirectFB_WarpMouse;
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90 mouse.FreeMouse = DirectFB_FreeMouse;
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91 mouse.cursor_shown = 1;
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92
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93 SDL_AddMouse(&mouse, "Mouse", 0, 0, 1);
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94 devdata->num_mice = 1;
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95 }
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96 }
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97
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98 void
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99 DirectFB_QuitMouse(_THIS)
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100 {
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101 SDL_DFB_DEVICEDATA(_this);
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102
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103 if (devdata->use_linux_input) {
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104 SDL_MouseQuit();
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105 } else {
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106 SDL_DelMouse(0);
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107 }
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108 }
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109
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110 /* Create a cursor from a surface */
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111 static SDL_Cursor *
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112 DirectFB_CreateCursor(SDL_Surface * surface, int hot_x, int hot_y)
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113 {
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114 SDL_VideoDevice *dev = SDL_GetVideoDevice();
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115
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116 SDL_DFB_DEVICEDATA(dev);
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117 DFB_CursorData *curdata;
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118 DFBResult ret;
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119 DFBSurfaceDescription dsc;
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120 SDL_Cursor *cursor;
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121 Uint32 *dest;
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122 Uint32 *p;
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123 int pitch, i;
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124
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125 SDL_DFB_CALLOC(cursor, 1, sizeof(*cursor));
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126 SDL_DFB_CALLOC(curdata, 1, sizeof(*curdata));
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127
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128 dsc.flags =
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129 DSDESC_WIDTH | DSDESC_HEIGHT | DSDESC_PIXELFORMAT | DSDESC_CAPS;
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130 dsc.caps = DSCAPS_VIDEOONLY;
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131 dsc.width = surface->w;
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132 dsc.height = surface->h;
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133 dsc.pixelformat = DSPF_ARGB;
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134
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135 SDL_DFB_CHECKERR(devdata->dfb->CreateSurface(devdata->dfb, &dsc,
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136 &curdata->surf));
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137 curdata->hotx = hot_x;
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138 curdata->hoty = hot_y;
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139 cursor->driverdata = curdata;
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140
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141 SDL_DFB_CHECKERR(curdata->surf->Lock(curdata->surf, DSLF_WRITE,
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142 (void *) &dest, &pitch));
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143
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144 /* Relies on the fact that this is only called with ARGB surface. */
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145 p = surface->pixels;
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146 for (i = 0; i < surface->h; i++)
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147 memcpy((char *) dest + i * pitch,
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148 (char *) p + i * surface->pitch, 4 * surface->w);
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149
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150 curdata->surf->Unlock(curdata->surf);
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151 return cursor;
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152 error:
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153 return NULL;
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154 }
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155
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156 /* Show the specified cursor, or hide if cursor is NULL */
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157 static int
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158 DirectFB_ShowCursor(SDL_Cursor * cursor)
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159 {
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160 SDL_DFB_CURSORDATA(cursor);
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161 DFBResult ret;
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162 SDL_Window *window;
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163
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164 window = SDL_GetFocusWindow();
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165 if (!window)
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166 return -1;
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167 else {
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168 SDL_VideoDisplay *display = window->display;
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169
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170 if (display) {
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171 DFB_DisplayData *dispdata =
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172 (DFB_DisplayData *) display->driverdata;
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173 DFB_WindowData *windata = (DFB_WindowData *) window->driverdata;
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174
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175 if (cursor)
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176 SDL_DFB_CHECKERR(windata->window->
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177 SetCursorShape(windata->window,
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178 curdata->surf, curdata->hotx,
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179 curdata->hoty));
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180
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181 SDL_DFB_CHECKERR(dispdata->layer->
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182 SetCooperativeLevel(dispdata->layer,
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183 DLSCL_ADMINISTRATIVE));
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184 SDL_DFB_CHECKERR(dispdata->layer->
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185 SetCursorOpacity(dispdata->layer,
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186 cursor ? 0xC0 : 0x00));
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187 SDL_DFB_CHECKERR(dispdata->layer->
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188 SetCooperativeLevel(dispdata->layer,
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189 DLSCL_SHARED));
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190 }
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191 }
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192
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193 return 0;
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194 error:
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195 return -1;
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196 }
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197
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198 /* This is called when a mouse motion event occurs */
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199 static void
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200 DirectFB_MoveCursor(SDL_Cursor * cursor)
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201 {
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diff changeset
202
2226
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203 }
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204
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diff changeset
205 /* Free a window manager cursor */
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diff changeset
206 static void
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207 DirectFB_FreeCursor(SDL_Cursor * cursor)
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diff changeset
208 {
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209 SDL_DFB_CURSORDATA(cursor);
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210
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211 SDL_DFB_RELEASE(curdata->surf);
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212 SDL_DFB_FREE(cursor->driverdata);
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diff changeset
213 SDL_DFB_FREE(cursor);
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214 }
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diff changeset
215
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diff changeset
216 /* Warp the mouse to (x,y) */
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diff changeset
217 static void
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218 DirectFB_WarpMouse(SDL_Mouse * mouse, SDL_Window * window, int x, int y)
2226
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diff changeset
219 {
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220 SDL_VideoDisplay *display = window->display;
2226
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221 DFB_DisplayData *dispdata = (DFB_DisplayData *) display->driverdata;
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diff changeset
222 DFB_WindowData *windata = (DFB_WindowData *) window->driverdata;
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diff changeset
223 DFBResult ret;
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diff changeset
224 int cx, cy;
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diff changeset
225
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diff changeset
226 SDL_DFB_CHECKERR(windata->window->GetPosition(windata->window, &cx, &cy));
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227 SDL_DFB_CHECKERR(dispdata->layer->WarpCursor(dispdata->layer,
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diff changeset
228 cx + x + windata->client.x,
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diff changeset
229 cy + y + windata->client.y));
2226
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diff changeset
230
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diff changeset
231 error:
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diff changeset
232 return;
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diff changeset
233 }
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diff changeset
234
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diff changeset
235 /* Free the mouse when it's time */
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diff changeset
236 static void
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diff changeset
237 DirectFB_FreeMouse(SDL_Mouse * mouse)
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diff changeset
238 {
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239 /* nothing yet */
2226
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240 }
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241
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diff changeset
242 /* vi: set ts=4 sw=4 expandtab: */