subsys/win32k/objects/coord.c

   1 /* $Id$
   2  *
   3  * COPYRIGHT:        See COPYING in the top level directory
   4  * PROJECT:          ReactOS kernel
   5  * PURPOSE:          Coordinate systems
   6  * FILE:             subsys/win32k/objects/coord.c
   7  * PROGRAMER:        Unknown
   8  */
   9
  10 /* INCLUDES ******************************************************************/
  11
  12 #include <windows.h>
  13 #include <ddk/ntddk.h>
  14 #include <internal/safe.h>
  15 #include <win32k/coord.h>
  16 #include <win32k/dc.h>
  17 #define NDEBUG
  18 #include <win32k/debug1.h>
  19
  20 /* FUNCTIONS *****************************************************************/
  21
  22 BOOL STDCALL W32kCombineTransform(LPXFORM  UnsafeXFormResult,
  23                            CONST LPXFORM  Unsafexform1,
  24                            CONST LPXFORM  Unsafexform2)
  25 {
  26   XFORM  xformTemp;
  27   XFORM  xform1, xform2;
  28
  29   /* Check for illegal parameters */
  30   if (!UnsafeXFormResult || !Unsafexform1 || !Unsafexform2)
  31   {
  32     return  FALSE;
  33   }
  34
  35   MmCopyFromCaller( &xform1, Unsafexform1, sizeof(XFORM) );
  36   MmCopyFromCaller( &xform2, Unsafexform2, sizeof(XFORM) );
  37
  38   /* Create the result in a temporary XFORM, since xformResult may be
  39    * equal to xform1 or xform2 */
  40   xformTemp.eM11 = xform1.eM11 * xform2.eM11 + xform1.eM12 * xform2.eM21;
  41   xformTemp.eM12 = xform1.eM11 * xform2.eM12 + xform1.eM12 * xform2.eM22;
  42   xformTemp.eM21 = xform1.eM21 * xform2.eM11 + xform1.eM22 * xform2.eM21;
  43   xformTemp.eM22 = xform1.eM21 * xform2.eM12 + xform1.eM22 * xform2.eM22;
  44   xformTemp.eDx  = xform1.eDx  * xform2.eM11 + xform1.eDy  * xform2.eM21 + xform2.eDx;
  45   xformTemp.eDy  = xform1.eDx  * xform2.eM12 + xform1.eDy  * xform2.eM22 + xform2.eDy;
  46
  47   /* Copy the result to xformResult */
  48   MmCopyToCaller(  UnsafeXFormResult, &xformTemp, sizeof(XFORM) );
  49
  50   return  TRUE;
  51 }
  52
  53 VOID STATIC
  54 CoordDPtoLP(PDC Dc, LPPOINT Point)
  55 {
  56 FLOAT x, y;
  57   x = (FLOAT)Point->x;
  58   y = (FLOAT)Point->y;
  59   Point->x = x * Dc->w.xformVport2World.eM11 +
  60     y * Dc->w.xformVport2World.eM21 + Dc->w.xformVport2World.eDx;
  61   Point->y = x * Dc->w.xformVport2World.eM12 +
  62     y * Dc->w.xformVport2World.eM22 + Dc->w.xformVport2World.eDy;
  63 }
  64
  65 /*!
  66  * Converts points from device coordinates into logical coordinates. Conversion depends on the mapping mode,
  67  * world transfrom, viewport origin settings for the given device context.
  68  * \param       hDC             device context.
  69  * \param       Points  an array of POINT structures (in/out).
  70  * \param       Count   number of elements in the array of POINT structures.
  71  * \return  TRUE        if success.
  72 */
  73 BOOL STDCALL
  74 W32kDPtoLP(HDC  hDC,
  75            LPPOINT  UnsafePoints,
  76            int  Count)
  77 {
  78   PDC Dc;
  79   ULONG i;
  80   LPPOINT Points = (LPPOINT) ExAllocatePool( PagedPool, Count*sizeof(POINT));
  81
  82   ASSERT(Points);
  83   MmCopyFromCaller( Points, UnsafePoints, Count*sizeof(POINT) );
  84
  85   Dc = DC_HandleToPtr (hDC);
  86   if (Dc == NULL || !Dc->w.vport2WorldValid)
  87     {
  88       return(FALSE);
  89     }
  90
  91   for (i = 0; i < Count; i++)
  92     {
  93       CoordDPtoLP(Dc, &Points[i]);
  94     }
  95   DC_ReleasePtr( hDC );
  96
  97   MmCopyToCaller(  UnsafePoints, Points, Count*sizeof(POINT) );
  98   return(TRUE);
  99 }
 100
 101 int
 102 STDCALL
 103 W32kGetGraphicsMode(HDC  hDC)
 104 {
 105   PDC  dc;
 106   int  GraphicsMode;
 107
 108   dc = DC_HandleToPtr (hDC);
 109   if (!dc)
 110   {
 111     return  0;
 112   }
 113
 114   GraphicsMode = dc->w.GraphicsMode;
 115   DC_ReleasePtr( hDC );
 116   return  GraphicsMode;
 117 }
 118
 119 BOOL
 120 STDCALL
 121 W32kGetWorldTransform(HDC  hDC,
 122                       LPXFORM  XForm)
 123 {
 124   PDC  dc;
 125
 126   dc = DC_HandleToPtr (hDC);
 127   if (!dc)
 128   {
 129     return  FALSE;
 130   }
 131   if (!XForm)
 132   {
 133     return  FALSE;
 134   }
 135   *XForm = dc->w.xformWorld2Wnd;
 136   DC_ReleasePtr( hDC );
 137   return  TRUE;
 138 }
 139
 140 VOID STATIC
 141 CoordLPtoDP(PDC Dc, LPPOINT Point)
 142 {
 143   FLOAT x, y;
 144   x = (FLOAT)Point->x;
 145   y = (FLOAT)Point->y;
 146   Point->x = x * Dc->w.xformWorld2Vport.eM11 +
 147     y * Dc->w.xformWorld2Vport.eM21 + Dc->w.xformWorld2Vport.eDx;
 148   Point->y = x * Dc->w.xformWorld2Vport.eM12 +
 149     y * Dc->w.xformWorld2Vport.eM22 + Dc->w.xformWorld2Vport.eDy;
 150 }
 151
 152 /*!
 153  * Converts points from logical coordinates into device coordinates. Conversion depends on the mapping mode,
 154  * world transfrom, viewport origin settings for the given device context.
 155  * \param       hDC             device context.
 156  * \param       Points  an array of POINT structures (in/out).
 157  * \param       Count   number of elements in the array of POINT structures.
 158  * \return  TRUE        if success.
 159 */
 160 BOOL STDCALL
 161 W32kLPtoDP(HDC hDC, LPPOINT UnsafePoints, INT Count)
 162 {
 163   PDC Dc;
 164   ULONG i;
 165   LPPOINT Points = (LPPOINT) ExAllocatePool( PagedPool, Count*sizeof(POINT));
 166
 167   ASSERT(Points);
 168   MmCopyFromCaller( Points, UnsafePoints, Count*sizeof(POINT) );
 169
 170   Dc = DC_HandleToPtr (hDC);
 171   if (Dc == NULL)
 172     {
 173       return(FALSE);
 174     }
 175
 176   for (i = 0; i < Count; i++)
 177     {
 178       CoordLPtoDP(Dc, &Points[i]);
 179     }
 180   DC_ReleasePtr( hDC );
 181   MmCopyToCaller(  UnsafePoints, Points, Count*sizeof(POINT) );
 182   return(TRUE);
 183 }
 184
 185 BOOL
 186 STDCALL
 187 W32kModifyWorldTransform(HDC  hDC,
 188                                CONST LPXFORM  UnsafeXForm,
 189                                DWORD  Mode)
 190 {
 191   PDC  dc;
 192   LPXFORM XForm = (LPXFORM) ExAllocatePool( PagedPool, sizeof( XFORM ) );
 193
 194   ASSERT( XForm );
 195
 196   MmCopyFromCaller( XForm, UnsafeXForm, sizeof( XFORM ) );
 197
 198   dc = DC_HandleToPtr (hDC);
 199   if (!dc)
 200   {
 201 //    SetLastError( ERROR_INVALID_HANDLE );
 202     return  FALSE;
 203   }
 204   if (!XForm)
 205   {
 206     return FALSE;
 207   }
 208
 209   /* Check that graphics mode is GM_ADVANCED */
 210   if (dc->w.GraphicsMode!=GM_ADVANCED)
 211   {
 212     return FALSE;
 213   }
 214   switch (Mode)
 215   {
 216     case MWT_IDENTITY:
 217       dc->w.xformWorld2Wnd.eM11 = 1.0f;
 218       dc->w.xformWorld2Wnd.eM12 = 0.0f;
 219       dc->w.xformWorld2Wnd.eM21 = 0.0f;
 220       dc->w.xformWorld2Wnd.eM22 = 1.0f;
 221       dc->w.xformWorld2Wnd.eDx  = 0.0f;
 222       dc->w.xformWorld2Wnd.eDy  = 0.0f;
 223       break;
 224
 225     case MWT_LEFTMULTIPLY:
 226       W32kCombineTransform(&dc->w.xformWorld2Wnd, XForm, &dc->w.xformWorld2Wnd );
 227       break;
 228
 229     case MWT_RIGHTMULTIPLY:
 230       W32kCombineTransform(&dc->w.xformWorld2Wnd, &dc->w.xformWorld2Wnd, XForm);
 231       break;
 232
 233     default:
 234           DC_ReleasePtr( hDC );
 235       return FALSE;
 236   }
 237   DC_UpdateXforms (dc);
 238   DC_ReleasePtr( hDC );
 239   return  TRUE;
 240 }
 241
 242 BOOL
 243 STDCALL
 244 W32kOffsetViewportOrgEx(HDC  hDC,
 245                               int  XOffset,
 246                               int  YOffset,
 247                               LPPOINT  Point)
 248 {
 249   UNIMPLEMENTED;
 250 }
 251
 252 BOOL
 253 STDCALL
 254 W32kOffsetWindowOrgEx(HDC  hDC,
 255                             int  XOffset,
 256                             int  YOffset,
 257                             LPPOINT  Point)
 258 {
 259   UNIMPLEMENTED;
 260 }
 261
 262 BOOL
 263 STDCALL
 264 W32kScaleViewportExtEx(HDC  hDC,
 265                              int  Xnum,
 266                              int  Xdenom,
 267                              int  Ynum,
 268                              int  Ydenom,
 269                              LPSIZE  Size)
 270 {
 271   UNIMPLEMENTED;
 272 }
 273
 274 BOOL
 275 STDCALL
 276 W32kScaleWindowExtEx(HDC  hDC,
 277                            int  Xnum,
 278                            int  Xdenom,
 279                            int  Ynum,
 280                            int  Ydenom,
 281                            LPSIZE  Size)
 282 {
 283   UNIMPLEMENTED;
 284 }
 285
 286 int
 287 STDCALL
 288 W32kSetGraphicsMode(HDC  hDC,
 289                          int  Mode)
 290 {
 291   INT ret;
 292   DC *dc;
 293
 294   dc = DC_HandleToPtr (hDC);
 295   if (!dc)
 296   {
 297     return 0;
 298   }
 299
 300   /* One would think that setting the graphics mode to GM_COMPATIBLE
 301    * would also reset the world transformation matrix to the unity
 302    * matrix. However, in Windows, this is not the case. This doesn't
 303    * make a lot of sense to me, but that's the way it is.
 304    */
 305
 306   if ((Mode != GM_COMPATIBLE) && (Mode != GM_ADVANCED))
 307   {
 308         DC_ReleasePtr( hDC );
 309     return 0;
 310   }
 311   ret = dc->w.GraphicsMode;
 312   dc->w.GraphicsMode = Mode;
 313   DC_ReleasePtr( hDC );
 314   return  ret;
 315 }
 316
 317 int
 318 STDCALL
 319 W32kSetMapMode(HDC  hDC,
 320                     int  MapMode)
 321 {
 322   UNIMPLEMENTED;
 323 }
 324
 325 BOOL
 326 STDCALL
 327 W32kSetViewportExtEx(HDC  hDC,
 328                            int  XExtent,
 329                            int  YExtent,
 330                            LPSIZE  Size)
 331 {
 332   UNIMPLEMENTED;
 333 }
 334
 335 BOOL
 336 STDCALL
 337 W32kSetViewportOrgEx(HDC  hDC,
 338                            int  X,
 339                            int  Y,
 340                            LPPOINT  Point)
 341 {
 342   UNIMPLEMENTED;
 343 }
 344
 345 BOOL
 346 STDCALL
 347 W32kSetWindowExtEx(HDC  hDC,
 348                          int  XExtent,
 349                          int  YExtent,
 350                          LPSIZE  Size)
 351 {
 352   UNIMPLEMENTED;
 353 }
 354
 355 BOOL
 356 STDCALL
 357 W32kSetWindowOrgEx(HDC  hDC,
 358                          int  X,
 359                          int  Y,
 360                          LPPOINT  Point)
 361 {
 362   UNIMPLEMENTED;
 363 }
 364
 365 BOOL
 366 STDCALL
 367 W32kSetWorldTransform(HDC  hDC,
 368                             CONST LPXFORM  XForm)
 369 {
 370   PDC  dc;
 371
 372   dc = DC_HandleToPtr (hDC);
 373   if (!dc)
 374   {
 375     return  FALSE;
 376   }
 377   if (!XForm)
 378   {
 379         DC_ReleasePtr( hDC );
 380     return  FALSE;
 381   }
 382
 383   /* Check that graphics mode is GM_ADVANCED */
 384   if (dc->w.GraphicsMode != GM_ADVANCED)
 385   {
 386         DC_ReleasePtr( hDC );
 387     return  FALSE;
 388   }
 389   dc->w.xformWorld2Wnd = *XForm;
 390   DC_UpdateXforms (dc);
 391   DC_ReleasePtr( hDC );
 392   return  TRUE;
 393 }
 394
 395