dlls/gdi32/mapping.c

   1 /*
   2  * GDI mapping mode functions
   3  *
   4  * Copyright 1993 Alexandre Julliard
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  */
  20
  21 #include <stdarg.h>
  22
  23 #include "windef.h"
  24 #include "winbase.h"
  25 #include "wingdi.h"
  26 #include "wownt32.h"
  27 #include "gdi_private.h"
  28 #include "wine/debug.h"
  29
  30 WINE_DEFAULT_DEBUG_CHANNEL(gdi);
  31
  32
  33 /***********************************************************************
  34  *           MAPPING_FixIsotropic
  35  *
  36  * Fix viewport extensions for isotropic mode.
  37  */
  38 static void MAPPING_FixIsotropic( DC * dc )
  39 {
  40     double xdim = fabs((double)dc->vportExtX * GetDeviceCaps( dc->hSelf, HORZSIZE ) /
  41                   (GetDeviceCaps( dc->hSelf, HORZRES ) * dc->wndExtX));
  42     double ydim = fabs((double)dc->vportExtY * GetDeviceCaps( dc->hSelf, VERTSIZE ) /
  43                   (GetDeviceCaps( dc->hSelf, VERTRES ) * dc->wndExtY));
  44
  45     if (xdim > ydim)
  46     {
  47         INT mincx = (dc->vportExtX >= 0) ? 1 : -1;
  48         dc->vportExtX = floor(dc->vportExtX * ydim / xdim + 0.5);
  49         if (!dc->vportExtX) dc->vportExtX = mincx;
  50     }
  51     else
  52     {
  53         INT mincy = (dc->vportExtY >= 0) ? 1 : -1;
  54         dc->vportExtY = floor(dc->vportExtY * xdim / ydim + 0.5);
  55         if (!dc->vportExtY) dc->vportExtY = mincy;
  56     }
  57 }
  58
  59
  60 /***********************************************************************
  61  *           DPtoLP    (GDI.67)
  62  */
  63 BOOL16 WINAPI DPtoLP16( HDC16 hdc, LPPOINT16 points, INT16 count )
  64 {
  65     DC * dc = get_dc_ptr( HDC_32(hdc) );
  66     if (!dc) return FALSE;
  67
  68     while (count--)
  69     {
  70         points->x = MulDiv( points->x - dc->vportOrgX, dc->wndExtX, dc->vportExtX ) + dc->wndOrgX;
  71         points->y = MulDiv( points->y - dc->vportOrgY, dc->wndExtY, dc->vportExtY ) + dc->wndOrgY;
  72         points++;
  73     }
  74     release_dc_ptr( dc );
  75     return TRUE;
  76 }
  77
  78
  79 /***********************************************************************
  80  *           DPtoLP    (GDI32.@)
  81  */
  82 BOOL WINAPI DPtoLP( HDC hdc, LPPOINT points, INT count )
  83 {
  84     DC * dc = get_dc_ptr( hdc );
  85     if (!dc) return FALSE;
  86
  87     if (dc->vport2WorldValid)
  88     {
  89         while (count--)
  90         {
  91             FLOAT x = points->x;
  92             FLOAT y = points->y;
  93             points->x = floor( x * dc->xformVport2World.eM11 +
  94                                y * dc->xformVport2World.eM21 +
  95                                dc->xformVport2World.eDx + 0.5 );
  96             points->y = floor( x * dc->xformVport2World.eM12 +
  97                                y * dc->xformVport2World.eM22 +
  98                                dc->xformVport2World.eDy + 0.5 );
  99             points++;
 100         }
 101     }
 102     release_dc_ptr( dc );
 103     return (count < 0);
 104 }
 105
 106
 107 /***********************************************************************
 108  *           LPtoDP    (GDI.99)
 109  */
 110 BOOL16 WINAPI LPtoDP16( HDC16 hdc, LPPOINT16 points, INT16 count )
 111 {
 112     DC * dc = get_dc_ptr( HDC_32(hdc) );
 113     if (!dc) return FALSE;
 114
 115     while (count--)
 116     {
 117         points->x = MulDiv( points->x - dc->wndOrgX, dc->vportExtX, dc->wndExtX ) + dc->vportOrgX;
 118         points->y = MulDiv( points->y - dc->wndOrgY, dc->vportExtY, dc->wndExtY ) + dc->vportOrgY;
 119         points++;
 120     }
 121     release_dc_ptr( dc );
 122     return TRUE;
 123 }
 124
 125
 126 /***********************************************************************
 127  *           LPtoDP    (GDI32.@)
 128  */
 129 BOOL WINAPI LPtoDP( HDC hdc, LPPOINT points, INT count )
 130 {
 131     DC * dc = get_dc_ptr( hdc );
 132     if (!dc) return FALSE;
 133
 134     while (count--)
 135     {
 136         FLOAT x = points->x;
 137         FLOAT y = points->y;
 138         points->x = floor( x * dc->xformWorld2Vport.eM11 +
 139                            y * dc->xformWorld2Vport.eM21 +
 140                            dc->xformWorld2Vport.eDx + 0.5 );
 141         points->y = floor( x * dc->xformWorld2Vport.eM12 +
 142                            y * dc->xformWorld2Vport.eM22 +
 143                            dc->xformWorld2Vport.eDy + 0.5 );
 144         points++;
 145     }
 146     release_dc_ptr( dc );
 147     return TRUE;
 148 }
 149
 150
 151 /***********************************************************************
 152  *           SetMapMode    (GDI32.@)
 153  */
 154 INT WINAPI SetMapMode( HDC hdc, INT mode )
 155 {
 156     INT ret;
 157     INT horzSize, vertSize, horzRes, vertRes;
 158
 159     DC * dc = get_dc_ptr( hdc );
 160     if (!dc) return 0;
 161     if (dc->funcs->pSetMapMode)
 162     {
 163         if((ret = dc->funcs->pSetMapMode( dc->physDev, mode )) != TRUE)
 164         {
 165             if(ret == GDI_NO_MORE_WORK)
 166                 ret = TRUE;
 167             goto done;
 168         }
 169     }
 170
 171     TRACE("%p %d\n", hdc, mode );
 172
 173     ret = dc->MapMode;
 174
 175     if (mode == dc->MapMode && (mode == MM_ISOTROPIC || mode == MM_ANISOTROPIC))
 176         goto done;
 177
 178     horzSize = GetDeviceCaps( hdc, HORZSIZE );
 179     vertSize = GetDeviceCaps( hdc, VERTSIZE );
 180     horzRes  = GetDeviceCaps( hdc, HORZRES );
 181     vertRes  = GetDeviceCaps( hdc, VERTRES );
 182     switch(mode)
 183     {
 184     case MM_TEXT:
 185         dc->wndExtX   = 1;
 186         dc->wndExtY   = 1;
 187         dc->vportExtX = 1;
 188         dc->vportExtY = 1;
 189         break;
 190     case MM_LOMETRIC:
 191     case MM_ISOTROPIC:
 192         dc->wndExtX   = horzSize * 10;
 193         dc->wndExtY   = vertSize * 10;
 194         dc->vportExtX = horzRes;
 195         dc->vportExtY = -vertRes;
 196         break;
 197     case MM_HIMETRIC:
 198         dc->wndExtX   = horzSize * 100;
 199         dc->wndExtY   = vertSize * 100;
 200         dc->vportExtX = horzRes;
 201         dc->vportExtY = -vertRes;
 202         break;
 203     case MM_LOENGLISH:
 204         dc->wndExtX   = MulDiv(1000, horzSize, 254);
 205         dc->wndExtY   = MulDiv(1000, vertSize, 254);
 206         dc->vportExtX = horzRes;
 207         dc->vportExtY = -vertRes;
 208         break;
 209     case MM_HIENGLISH:
 210         dc->wndExtX   = MulDiv(10000, horzSize, 254);
 211         dc->wndExtY   = MulDiv(10000, vertSize, 254);
 212         dc->vportExtX = horzRes;
 213         dc->vportExtY = -vertRes;
 214         break;
 215     case MM_TWIPS:
 216         dc->wndExtX   = MulDiv(14400, horzSize, 254);
 217         dc->wndExtY   = MulDiv(14400, vertSize, 254);
 218         dc->vportExtX = horzRes;
 219         dc->vportExtY = -vertRes;
 220         break;
 221     case MM_ANISOTROPIC:
 222         break;
 223     default:
 224         goto done;
 225     }
 226     dc->MapMode = mode;
 227     DC_UpdateXforms( dc );
 228  done:
 229     release_dc_ptr( dc );
 230     return ret;
 231 }
 232
 233
 234 /***********************************************************************
 235  *           SetViewportExtEx    (GDI32.@)
 236  */
 237 BOOL WINAPI SetViewportExtEx( HDC hdc, INT x, INT y, LPSIZE size )
 238 {
 239     INT ret = TRUE;
 240     DC * dc = get_dc_ptr( hdc );
 241     if (!dc) return FALSE;
 242     if (dc->funcs->pSetViewportExt)
 243     {
 244         if((ret = dc->funcs->pSetViewportExt( dc->physDev, x, y )) != TRUE)
 245         {
 246             if(ret == GDI_NO_MORE_WORK)
 247                 ret = TRUE;
 248             goto done;
 249         }
 250     }
 251     if (size)
 252     {
 253         size->cx = dc->vportExtX;
 254         size->cy = dc->vportExtY;
 255     }
 256     if ((dc->MapMode != MM_ISOTROPIC) && (dc->MapMode != MM_ANISOTROPIC))
 257         goto done;
 258     if (!x || !y)
 259     {
 260         ret = FALSE;
 261         goto done;
 262     }
 263     dc->vportExtX = x;
 264     dc->vportExtY = y;
 265     if (dc->MapMode == MM_ISOTROPIC) MAPPING_FixIsotropic( dc );
 266     DC_UpdateXforms( dc );
 267  done:
 268     release_dc_ptr( dc );
 269     return ret;
 270 }
 271
 272
 273 /***********************************************************************
 274  *           SetViewportOrgEx    (GDI32.@)
 275  */
 276 BOOL WINAPI SetViewportOrgEx( HDC hdc, INT x, INT y, LPPOINT pt )
 277 {
 278     INT ret = TRUE;
 279     DC * dc = get_dc_ptr( hdc );
 280     if (!dc) return FALSE;
 281     if (dc->funcs->pSetViewportOrg)
 282     {
 283         if((ret = dc->funcs->pSetViewportOrg( dc->physDev, x, y )) != TRUE)
 284         {
 285             if(ret == GDI_NO_MORE_WORK)
 286                 ret = TRUE;
 287             goto done;
 288         }
 289     }
 290     if (pt)
 291     {
 292         pt->x = dc->vportOrgX;
 293         pt->y = dc->vportOrgY;
 294     }
 295     dc->vportOrgX = x;
 296     dc->vportOrgY = y;
 297     DC_UpdateXforms( dc );
 298
 299  done:
 300     release_dc_ptr( dc );
 301     return ret;
 302 }
 303
 304
 305 /***********************************************************************
 306  *           SetWindowExtEx    (GDI32.@)
 307  */
 308 BOOL WINAPI SetWindowExtEx( HDC hdc, INT x, INT y, LPSIZE size )
 309 {
 310     INT ret = TRUE;
 311     DC * dc = get_dc_ptr( hdc );
 312     if (!dc) return FALSE;
 313     if (dc->funcs->pSetWindowExt)
 314     {
 315         if((ret = dc->funcs->pSetWindowExt( dc->physDev, x, y )) != TRUE)
 316         {
 317             if(ret == GDI_NO_MORE_WORK)
 318                 ret = TRUE;
 319             goto done;
 320         }
 321     }
 322     if (size)
 323     {
 324         size->cx = dc->wndExtX;
 325         size->cy = dc->wndExtY;
 326     }
 327     if ((dc->MapMode != MM_ISOTROPIC) && (dc->MapMode != MM_ANISOTROPIC))
 328         goto done;
 329     if (!x || !y)
 330     {
 331         ret = FALSE;
 332         goto done;
 333     }
 334     dc->wndExtX = x;
 335     dc->wndExtY = y;
 336     /* The API docs say that you should call SetWindowExtEx before
 337        SetViewportExtEx. This advice does not imply that Windows
 338        doesn't ensure the isotropic mapping after SetWindowExtEx! */
 339     if (dc->MapMode == MM_ISOTROPIC) MAPPING_FixIsotropic( dc );
 340     DC_UpdateXforms( dc );
 341  done:
 342     release_dc_ptr( dc );
 343     return ret;
 344 }
 345
 346
 347 /***********************************************************************
 348  *           SetWindowOrgEx    (GDI32.@)
 349  */
 350 BOOL WINAPI SetWindowOrgEx( HDC hdc, INT x, INT y, LPPOINT pt )
 351 {
 352     INT ret = TRUE;
 353     DC * dc = get_dc_ptr( hdc );
 354     if (!dc) return FALSE;
 355     if (dc->funcs->pSetWindowOrg)
 356     {
 357         if((ret = dc->funcs->pSetWindowOrg( dc->physDev, x, y )) != TRUE)
 358         {
 359             if(ret == GDI_NO_MORE_WORK)
 360                 ret = TRUE;
 361             goto done;
 362         }
 363     }
 364     if (pt)
 365     {
 366         pt->x = dc->wndOrgX;
 367         pt->y = dc->wndOrgY;
 368     }
 369     dc->wndOrgX = x;
 370     dc->wndOrgY = y;
 371     DC_UpdateXforms( dc );
 372  done:
 373     release_dc_ptr( dc );
 374     return ret;
 375 }
 376
 377
 378 /***********************************************************************
 379  *           OffsetViewportOrgEx    (GDI32.@)
 380  */
 381 BOOL WINAPI OffsetViewportOrgEx( HDC hdc, INT x, INT y, LPPOINT pt)
 382 {
 383     INT ret = TRUE;
 384     DC * dc = get_dc_ptr( hdc );
 385     if (!dc) return FALSE;
 386     if (dc->funcs->pOffsetViewportOrg)
 387     {
 388         if((ret = dc->funcs->pOffsetViewportOrg( dc->physDev, x, y )) != TRUE)
 389         {
 390             if(ret == GDI_NO_MORE_WORK)
 391                 ret = TRUE;
 392             goto done;
 393         }
 394     }
 395     if (pt)
 396     {
 397         pt->x = dc->vportOrgX;
 398         pt->y = dc->vportOrgY;
 399     }
 400     dc->vportOrgX += x;
 401     dc->vportOrgY += y;
 402     DC_UpdateXforms( dc );
 403  done:
 404     release_dc_ptr( dc );
 405     return ret;
 406 }
 407
 408
 409 /***********************************************************************
 410  *           OffsetWindowOrgEx    (GDI32.@)
 411  */
 412 BOOL WINAPI OffsetWindowOrgEx( HDC hdc, INT x, INT y, LPPOINT pt )
 413 {
 414     INT ret = TRUE;
 415     DC * dc = get_dc_ptr( hdc );
 416     if (!dc) return FALSE;
 417     if (dc->funcs->pOffsetWindowOrg)
 418     {
 419         if((ret = dc->funcs->pOffsetWindowOrg( dc->physDev, x, y )) != TRUE)
 420         {
 421             if(ret == GDI_NO_MORE_WORK)
 422                 ret = TRUE;
 423             goto done;
 424         }
 425     }
 426     if (pt)
 427     {
 428         pt->x = dc->wndOrgX;
 429         pt->y = dc->wndOrgY;
 430     }
 431     dc->wndOrgX += x;
 432     dc->wndOrgY += y;
 433     DC_UpdateXforms( dc );
 434  done:
 435     release_dc_ptr( dc );
 436     return ret;
 437 }
 438
 439
 440 /***********************************************************************
 441  *           ScaleViewportExtEx    (GDI32.@)
 442  */
 443 BOOL WINAPI ScaleViewportExtEx( HDC hdc, INT xNum, INT xDenom,
 444                                     INT yNum, INT yDenom, LPSIZE size )
 445 {
 446     INT ret = TRUE;
 447     DC * dc = get_dc_ptr( hdc );
 448     if (!dc) return FALSE;
 449     if (dc->funcs->pScaleViewportExt)
 450     {
 451         if((ret = dc->funcs->pScaleViewportExt( dc->physDev, xNum, xDenom, yNum, yDenom )) != TRUE)
 452         {
 453             if(ret == GDI_NO_MORE_WORK)
 454                 ret = TRUE;
 455             goto done;
 456         }
 457     }
 458     if (size)
 459     {
 460         size->cx = dc->vportExtX;
 461         size->cy = dc->vportExtY;
 462     }
 463     if ((dc->MapMode != MM_ISOTROPIC) && (dc->MapMode != MM_ANISOTROPIC))
 464         goto done;
 465     if (!xNum || !xDenom || !xNum || !yDenom)
 466     {
 467         ret = FALSE;
 468         goto done;
 469     }
 470     dc->vportExtX = (dc->vportExtX * xNum) / xDenom;
 471     dc->vportExtY = (dc->vportExtY * yNum) / yDenom;
 472     if (dc->vportExtX == 0) dc->vportExtX = 1;
 473     if (dc->vportExtY == 0) dc->vportExtY = 1;
 474     if (dc->MapMode == MM_ISOTROPIC) MAPPING_FixIsotropic( dc );
 475     DC_UpdateXforms( dc );
 476  done:
 477     release_dc_ptr( dc );
 478     return ret;
 479 }
 480
 481
 482 /***********************************************************************
 483  *           ScaleWindowExtEx    (GDI32.@)
 484  */
 485 BOOL WINAPI ScaleWindowExtEx( HDC hdc, INT xNum, INT xDenom,
 486                                   INT yNum, INT yDenom, LPSIZE size )
 487 {
 488     INT ret = TRUE;
 489     DC * dc = get_dc_ptr( hdc );
 490     if (!dc) return FALSE;
 491     if (dc->funcs->pScaleWindowExt)
 492     {
 493         if((ret = dc->funcs->pScaleWindowExt( dc->physDev, xNum, xDenom, yNum, yDenom )) != TRUE)
 494         {
 495             if(ret == GDI_NO_MORE_WORK)
 496                 ret = TRUE;
 497             goto done;
 498         }
 499     }
 500     if (size)
 501     {
 502         size->cx = dc->wndExtX;
 503         size->cy = dc->wndExtY;
 504     }
 505     if ((dc->MapMode != MM_ISOTROPIC) && (dc->MapMode != MM_ANISOTROPIC))
 506         goto done;
 507     if (!xNum || !xDenom || !xNum || !yDenom)
 508     {
 509         ret = FALSE;
 510         goto done;
 511     }
 512     dc->wndExtX = (dc->wndExtX * xNum) / xDenom;
 513     dc->wndExtY = (dc->wndExtY * yNum) / yDenom;
 514     if (dc->wndExtX == 0) dc->wndExtX = 1;
 515     if (dc->wndExtY == 0) dc->wndExtY = 1;
 516     if (dc->MapMode == MM_ISOTROPIC) MAPPING_FixIsotropic( dc );
 517     DC_UpdateXforms( dc );
 518  done:
 519     release_dc_ptr( dc );
 520     return ret;
 521 }