windows/x11drv/mouse.c

   1 /*
   2  * X11 mouse driver
   3  *
   4  * Copyright 1998 Ulrich Weigand
   5  */
   6
   7 #include "config.h"
   8
   9 #ifndef X_DISPLAY_MISSING
  10
  11 #include "ts_xlib.h"
  12
  13 #include "callback.h"
  14 #include "debugtools.h"
  15 #include "mouse.h"
  16 #include "win.h"
  17 #include "windef.h"
  18 #include "x11drv.h"
  19
  20 DEFAULT_DEBUG_CHANNEL(cursor)
  21
  22 /**********************************************************************/
  23
  24 Cursor X11DRV_MOUSE_XCursor = None;    /* Current X cursor */
  25
  26 static LONG X11DRV_MOUSE_WarpPointer = 0;  /* hack; see DISPLAY_MoveCursor */
  27
  28 /***********************************************************************
  29  *              X11DRV_MOUSE_DoSetCursor
  30  */
  31 static BOOL X11DRV_MOUSE_DoSetCursor( CURSORICONINFO *ptr )
  32 {
  33     Pixmap pixmapBits, pixmapMask, pixmapMaskInv, pixmapAll;
  34     XColor fg, bg;
  35     Cursor cursor = None;
  36
  37     if (!ptr)  /* Create an empty cursor */
  38     {
  39         static const char data[] = { 0 };
  40
  41         bg.red = bg.green = bg.blue = 0x0000;
  42         pixmapBits = XCreateBitmapFromData( display, X11DRV_GetXRootWindow(), data, 1, 1 );
  43         if (pixmapBits)
  44         {
  45             cursor = XCreatePixmapCursor( display, pixmapBits, pixmapBits,
  46                                           &bg, &bg, 0, 0 );
  47             XFreePixmap( display, pixmapBits );
  48         }
  49     }
  50     else  /* Create the X cursor from the bits */
  51     {
  52         XImage *image;
  53
  54         if (ptr->bPlanes * ptr->bBitsPerPixel != 1)
  55         {
  56             WARN("Cursor has more than 1 bpp!\n" );
  57             return FALSE;
  58         }
  59
  60         /* Create a pixmap and transfer all the bits to it */
  61
  62         /* NOTE: Following hack works, but only because XFree depth
  63          *       1 images really use 1 bit/pixel (and so the same layout
  64          *       as the Windows cursor data). Perhaps use a more generic
  65          *       algorithm here.
  66          */
  67         pixmapAll = XCreatePixmap( display, X11DRV_GetXRootWindow(),
  68                                    ptr->nWidth, ptr->nHeight * 2, 1 );
  69         image = XCreateImage( display, X11DRV_GetVisual(),
  70                               1, ZPixmap, 0, (char *)(ptr + 1), ptr->nWidth,
  71                               ptr->nHeight * 2, 16, ptr->nWidthBytes);
  72         if (image)
  73         {
  74             image->byte_order = MSBFirst;
  75             image->bitmap_bit_order = MSBFirst;
  76             image->bitmap_unit = 16;
  77             _XInitImageFuncPtrs(image);
  78             if (pixmapAll)
  79                 XPutImage( display, pixmapAll, BITMAP_monoGC, image,
  80                            0, 0, 0, 0, ptr->nWidth, ptr->nHeight * 2 );
  81             image->data = NULL;
  82             XDestroyImage( image );
  83         }
  84
  85         /* Now create the 2 pixmaps for bits and mask */
  86
  87         pixmapBits = XCreatePixmap( display, X11DRV_GetXRootWindow(),
  88                                     ptr->nWidth, ptr->nHeight, 1 );
  89         pixmapMask = XCreatePixmap( display, X11DRV_GetXRootWindow(),
  90                                     ptr->nWidth, ptr->nHeight, 1 );
  91         pixmapMaskInv = XCreatePixmap( display, X11DRV_GetXRootWindow(),
  92                                     ptr->nWidth, ptr->nHeight, 1 );
  93
  94         /* Make sure everything went OK so far */
  95
  96         if (pixmapBits && pixmapMask && pixmapAll)
  97         {
  98             /* We have to do some magic here, as cursors are not fully
  99              * compatible between Windows and X11. Under X11, there
 100              * are only 3 possible color cursor: black, white and
 101              * masked. So we map the 4th Windows color (invert the
 102              * bits on the screen) to black and an additional white bit on
 103              * an other place (+1,+1). This require some boolean arithmetic:
 104              *
 105              *         Windows          |          X11
 106              * And    Xor      Result   |   Bits     Mask     Result
 107              *  0      0     black      |    0        1     background
 108              *  0      1     white      |    1        1     foreground
 109              *  1      0     no change  |    X        0     no change
 110              *  1      1     inverted   |    0        1     background
 111              *
 112              * which gives:
 113              *  Bits = not 'And' and 'Xor' or 'And2' and 'Xor2'
 114              *  Mask = not 'And' or 'Xor' or 'And2' and 'Xor2'
 115              *
 116              * FIXME: apparently some servers do support 'inverted' color.
 117              * I don't know if it's correct per the X spec, but maybe
 118              * we ought to take advantage of it.  -- AJ
 119              */
 120             XSetFunction( display, BITMAP_monoGC, GXcopy );
 121             XCopyArea( display, pixmapAll, pixmapBits, BITMAP_monoGC,
 122                        0, 0, ptr->nWidth, ptr->nHeight, 0, 0 );
 123             XCopyArea( display, pixmapAll, pixmapMask, BITMAP_monoGC,
 124                        0, 0, ptr->nWidth, ptr->nHeight, 0, 0 );
 125             XCopyArea( display, pixmapAll, pixmapMaskInv, BITMAP_monoGC,
 126                        0, 0, ptr->nWidth, ptr->nHeight, 0, 0 );
 127             XSetFunction( display, BITMAP_monoGC, GXand );
 128             XCopyArea( display, pixmapAll, pixmapMaskInv, BITMAP_monoGC,
 129                        0, ptr->nHeight, ptr->nWidth, ptr->nHeight, 0, 0 );
 130             XSetFunction( display, BITMAP_monoGC, GXandReverse );
 131             XCopyArea( display, pixmapAll, pixmapBits, BITMAP_monoGC,
 132                        0, ptr->nHeight, ptr->nWidth, ptr->nHeight, 0, 0 );
 133             XSetFunction( display, BITMAP_monoGC, GXorReverse );
 134             XCopyArea( display, pixmapAll, pixmapMask, BITMAP_monoGC,
 135                        0, ptr->nHeight, ptr->nWidth, ptr->nHeight, 0, 0 );
 136             /* Additional white */
 137             XSetFunction( display, BITMAP_monoGC, GXor );
 138             XCopyArea( display, pixmapMaskInv, pixmapMask, BITMAP_monoGC,
 139                        0, 0, ptr->nWidth, ptr->nHeight, 1, 1 );
 140             XCopyArea( display, pixmapMaskInv, pixmapBits, BITMAP_monoGC,
 141                        0, 0, ptr->nWidth, ptr->nHeight, 1, 1 );
 142             XSetFunction( display, BITMAP_monoGC, GXcopy );
 143             fg.red = fg.green = fg.blue = 0xffff;
 144             bg.red = bg.green = bg.blue = 0x0000;
 145             cursor = XCreatePixmapCursor( display, pixmapBits, pixmapMask,
 146                                 &fg, &bg, ptr->ptHotSpot.x, ptr->ptHotSpot.y );
 147         }
 148
 149         /* Now free everything */
 150
 151         if (pixmapAll) XFreePixmap( display, pixmapAll );
 152         if (pixmapBits) XFreePixmap( display, pixmapBits );
 153         if (pixmapMask) XFreePixmap( display, pixmapMask );
 154         if (pixmapMaskInv) XFreePixmap( display, pixmapMaskInv );
 155     }
 156
 157     if (cursor == None) return FALSE;
 158     if (X11DRV_MOUSE_XCursor != None) XFreeCursor( display, X11DRV_MOUSE_XCursor );
 159     X11DRV_MOUSE_XCursor = cursor;
 160
 161     return TRUE;
 162 }
 163
 164 /***********************************************************************
 165  *              X11DRV_MOUSE_SetCursor
 166  */
 167 void X11DRV_MOUSE_SetCursor( CURSORICONINFO *lpCursor )
 168 {
 169     BOOL success;
 170
 171     EnterCriticalSection( &X11DRV_CritSection );
 172     success = CALL_LARGE_STACK( X11DRV_MOUSE_DoSetCursor, lpCursor );
 173     LeaveCriticalSection( &X11DRV_CritSection );
 174     if ( !success ) return;
 175
 176     if (X11DRV_GetXRootWindow() != DefaultRootWindow(display))
 177     {
 178         /* If in desktop mode, set the cursor on the desktop window */
 179
 180         TSXDefineCursor( display, X11DRV_GetXRootWindow(), X11DRV_MOUSE_XCursor );
 181     }
 182     else
 183     {
 184         /* Else, set the same cursor for all top-level windows */
 185
 186         /* FIXME: we should not reference USER internals here, but native USER
 187                   works only in desktop mode anyway, so this should not matter */
 188
 189         HWND hwnd = GetWindow( GetDesktopWindow(), GW_CHILD );
 190         while(hwnd)
 191         {
 192             WND *tmpWnd = WIN_FindWndPtr(hwnd);
 193             Window win = X11DRV_WND_FindXWindow(tmpWnd );
 194             if (win && win!=DefaultRootWindow(display))
 195                 TSXDefineCursor( display, win, X11DRV_MOUSE_XCursor );
 196             hwnd = GetWindow( hwnd, GW_HWNDNEXT );
 197             WIN_ReleaseWndPtr(tmpWnd);
 198         }
 199     }
 200 }
 201
 202 /***********************************************************************
 203  *              X11DRV_MOUSE_MoveCursor
 204  */
 205 void X11DRV_MOUSE_MoveCursor(WORD wAbsX, WORD wAbsY)
 206 {
 207   /*
 208    * We do not want the to create MotionNotify events here,
 209    * otherwise we will get an endless recursion:
 210    * XMotionEvent -> MOUSEEVENTF_MOVE -> mouse_event -> DisplayMoveCursor
 211    * -> XWarpPointer -> XMotionEvent -> ...
 212    *
 213    * Unfortunately, the XWarpPointer call does create a MotionNotify
 214    * event. So, we use a hack: before MOUSE_SendEvent calls the mouse event
 215    * procedure, it sets a global flag. If this flag is set, we skip the
 216    * XWarpPointer call.  If we are *not* called from within MOUSE_SendEvent,
 217    * we will call XWarpPointer, which will create a MotionNotify event.
 218    * Strictly speaking, this is also wrong, but that should normally not
 219    * have any negative effects ...
 220    *
 221    * But first of all, we check whether we already are at the position
 222    * are supposed to move to; if so, we don't need to do anything.
 223    */
 224
 225   Window root, child;
 226   int rootX, rootY, winX, winY;
 227   unsigned int xstate;
 228
 229   if (X11DRV_MOUSE_WarpPointer < 0) return;
 230
 231   if (!TSXQueryPointer( display, X11DRV_GetXRootWindow(), &root, &child,
 232                         &rootX, &rootY, &winX, &winY, &xstate ))
 233     return;
 234
 235   if ( winX == wAbsX && winY == wAbsY )
 236     return;
 237
 238   TRACE("(%d,%d): moving from (%d,%d)\n", wAbsX, wAbsY, winX, winY );
 239
 240   TSXWarpPointer( display, X11DRV_GetXRootWindow(), X11DRV_GetXRootWindow(),
 241                   0, 0, 0, 0, wAbsX, wAbsY );
 242 }
 243
 244 /***********************************************************************
 245  *           X11DRV_MOUSE_EnableWarpPointer
 246  */
 247 LONG X11DRV_MOUSE_EnableWarpPointer(BOOL bEnable)
 248 {
 249   if (bEnable)
 250     return InterlockedIncrement( &X11DRV_MOUSE_WarpPointer );
 251   else
 252     return InterlockedDecrement( &X11DRV_MOUSE_WarpPointer );
 253 }
 254
 255 /***********************************************************************
 256  *           X11DRV_MOUSE_Init
 257  */
 258 void X11DRV_MOUSE_Init()
 259 {
 260   Window root, child;
 261   int root_x, root_y, child_x, child_y;
 262   unsigned int KeyState;
 263
 264   /* Get the current mouse position and simulate an absolute mouse
 265      movement to initialize the mouse global variables */
 266   TSXQueryPointer( display, X11DRV_GetXRootWindow(), &root, &child,
 267                    &root_x, &root_y, &child_x, &child_y, &KeyState);
 268
 269   MOUSE_SendEvent(MOUSEEVENTF_MOVE | MOUSEEVENTF_ABSOLUTE,
 270                   root_x, root_y,
 271                   X11DRV_EVENT_XStateToKeyState(KeyState),
 272                   GetTickCount(),
 273                   0);
 274 }
 275
 276
 277 #endif /* !defined(X_DISPLAY_MISSING) */