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annotate src/video/directfb/SDL_DirectFB_mouse.c @ 2663:0caed045d01b gsoc2008_audio_resampling

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General cleanup and fixed a buffer overrun bug. It may be necessary to normalize filter gain differently or something.
author Aaron Wishnick <schnarf@gmail.com>
date Tue, 12 Aug 2008 00:24:42 +0000
parents 1e690901ecd7
children e1da92da346c e82a0e3e9b0e
rev   line source
2226
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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 "SDL_DirectFB_video.h"
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25 #include "SDL_DirectFB_mouse.h"
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26
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27 #include "../SDL_sysvideo.h"
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28 #include "../../events/SDL_mouse_c.h"
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29
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30 static SDL_Cursor *DirectFB_CreateCursor(SDL_Surface * surface, int hot_x,
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31 int hot_y);
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32 static int DirectFB_ShowCursor(SDL_Cursor * cursor);
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33 static void DirectFB_MoveCursor(SDL_Cursor * cursor);
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34 static void DirectFB_FreeCursor(SDL_Cursor * cursor);
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35 static void DirectFB_WarpMouse(SDL_Mouse * mouse, SDL_WindowID windowID,
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36 int x, int y);
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37 static void DirectFB_FreeMouse(SDL_Mouse * mouse);
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38
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39 void
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40 DirectFB_InitMouse(_THIS)
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41 {
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42 SDL_DFB_DEVICEDATA(_this);
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43 SDL_Mouse mouse;
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44
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45 SDL_zero(mouse);
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46 mouse.CreateCursor = DirectFB_CreateCursor;
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47 mouse.ShowCursor = DirectFB_ShowCursor;
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48 mouse.MoveCursor = DirectFB_MoveCursor;
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49 mouse.FreeCursor = DirectFB_FreeCursor;
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50 mouse.WarpMouse = DirectFB_WarpMouse;
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51 mouse.FreeMouse = DirectFB_FreeMouse;
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52 devdata->mouse = SDL_AddMouse(&mouse, -1);
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53 }
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54
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55 void
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56 DirectFB_QuitMouse(_THIS)
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57 {
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58 SDL_DFB_DEVICEDATA(_this);
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59
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60 SDL_DelMouse(devdata->mouse);
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61 }
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62
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63 /* Create a cursor from a surface */
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64 static SDL_Cursor *
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65 DirectFB_CreateCursor(SDL_Surface * surface, int hot_x, int hot_y)
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66 {
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67 SDL_VideoDevice *dev = SDL_GetVideoDevice();
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68
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69 SDL_DFB_DEVICEDATA(dev);
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70 DFB_CursorData *curdata;
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71 DFBResult ret;
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72 DFBSurfaceDescription dsc;
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73 SDL_Cursor *cursor;
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74 Uint32 *dest;
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75 Uint32 *p;
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76 int pitch, i;
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77
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78 SDL_DFB_CALLOC(cursor, 1, sizeof(*cursor));
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79 SDL_DFB_CALLOC(curdata, 1, sizeof(*curdata));
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80
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81 dsc.flags =
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82 DSDESC_WIDTH | DSDESC_HEIGHT | DSDESC_PIXELFORMAT | DSDESC_CAPS;
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83 dsc.caps = DSCAPS_NONE; //DSCAPS_SYSTEMONLY;
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84 dsc.width = surface->w;
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85 dsc.height = surface->h;
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86 dsc.pixelformat = DSPF_ARGB;
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87
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88 SDL_DFB_CHECKERR(devdata->dfb->
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89 CreateSurface(devdata->dfb, &dsc, &curdata->surf));
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90 curdata->hotx = hot_x;
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91 curdata->hoty = hot_y;
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92 cursor->driverdata = curdata;
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93
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94 SDL_DFB_CHECKERR(curdata->surf->
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95 Lock(curdata->surf, DSLF_WRITE, (void *) &dest, &pitch));
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96
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97 //FIXME: Implies a lot of things, e.g. rgba format for SDL_SURFACE ....
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98 p = surface->pixels;
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99 for (i = 0; i < surface->w * surface->h; i++)
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100 if (p[i] == 0x00000000)
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101 dest[i] = 0x00000000;
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102 else
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103 dest[i] = p[i];
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104 //memcpy(dest, surface->pixels, surface->w * surface->h * 4);
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105 curdata->surf->Unlock(curdata->surf);
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106 return cursor;
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107 error:
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108 return NULL;
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109 }
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110
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111 /* Show the specified cursor, or hide if cursor is NULL */
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112 static int
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113 DirectFB_ShowCursor(SDL_Cursor * cursor)
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114 {
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115 //FIXME check for null cursor here
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116 SDL_DFB_CURSORDATA(cursor);
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117 SDL_VideoDevice *dev = SDL_GetVideoDevice();
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118 SDL_DFB_DEVICEDATA(dev);
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119 #if 0
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120 DFB_DisplayData *dispdata =
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121 (DFB_DisplayData *) dev->displays[dev->current_display].driverdata;
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122 #endif
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123 DFBResult ret;
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124 SDL_WindowID wid;
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125
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126 wid = SDL_GetFocusWindow();
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127 if (!wid)
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128 return -1;
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129 else {
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130 SDL_Window *window = SDL_GetWindowFromID(wid);
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131 SDL_VideoDisplay *display = SDL_GetDisplayFromWindow(window);
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132 DFB_DisplayData *dispdata = (DFB_DisplayData *) display->driverdata;
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133 DFB_WindowData *windata = (DFB_WindowData *) window->driverdata;
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134
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135 if (cursor)
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136 SDL_DFB_CHECKERR(windata->window->
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137 SetCursorShape(windata->window, curdata->surf,
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138 curdata->hotx, curdata->hoty));
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139 //FIXME: This is somehow a directfb issue
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140 //TODO: Check administrative
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141 SDL_DFB_CHECKERR(dispdata->layer->
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142 SetCooperativeLevel(dispdata->layer,
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143 DLSCL_ADMINISTRATIVE));
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144 SDL_DFB_CHECKERR(dispdata->layer->
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145 SetCursorOpacity(dispdata->layer,
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146 cursor ? 0xC0 : 0x00));
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147 SDL_DFB_CHECKERR(dispdata->layer->
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148 SetCooperativeLevel(dispdata->layer, DLSCL_SHARED));
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149 }
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150
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151 return 0;
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152 error:
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153 return -1;
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154 }
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155
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156 /* This is called when a mouse motion event occurs */
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157 static void
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158 DirectFB_MoveCursor(SDL_Cursor * cursor)
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159 {
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160 SDL_DFB_CURSORDATA(cursor);
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161 /* Do we need to do something here ? */
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162 }
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163
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164 /* Free a window manager cursor */
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165 static void
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166 DirectFB_FreeCursor(SDL_Cursor * cursor)
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167 {
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168 SDL_DFB_CURSORDATA(cursor);
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169
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170 SDL_DFB_RELEASE(curdata->surf);
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171 SDL_DFB_FREE(cursor->driverdata);
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172 SDL_DFB_FREE(cursor);
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173 }
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174
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175 /* Warp the mouse to (x,y) */
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176 static void
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177 DirectFB_WarpMouse(SDL_Mouse * mouse, SDL_WindowID windowID, int x, int y)
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178 {
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179 // SDL_DFB_CURSORDATA(cursor);
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180 SDL_Window *window = SDL_GetWindowFromID(windowID);
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181 SDL_VideoDisplay *display = SDL_GetDisplayFromWindow(window);
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182 DFB_DisplayData *dispdata = (DFB_DisplayData *) display->driverdata;
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183 DFB_WindowData *windata = (DFB_WindowData *) window->driverdata;
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184 DFBResult ret;
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185 int cx, cy;
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186
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187 SDL_DFB_CHECKERR(windata->window->GetPosition(windata->window, &cx, &cy));
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188 SDL_DFB_CHECKERR(dispdata->layer->
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189 WarpCursor(dispdata->layer, cx + x, cy + y));
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190
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191 error:
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192 return;
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193 }
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194
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195 /* Free the mouse when it's time */
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196 static void
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197 DirectFB_FreeMouse(SDL_Mouse * mouse)
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198 {
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199 // nothing yet
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200
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201 }
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202
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203 /* vi: set ts=4 sw=4 expandtab: */