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 "gdi_private.h"
  27 #include "wine/debug.h"
  28
  29 WINE_DEFAULT_DEBUG_CHANNEL(dc);
  30
  31
  32 /***********************************************************************
  33  *           MAPPING_FixIsotropic
  34  *
  35  * Fix viewport extensions for isotropic mode.
  36  */
  37 static void MAPPING_FixIsotropic( DC * dc )
  38 {
  39     double xdim = fabs((double)dc->vportExtX * dc->virtual_size.cx /
  40                   (dc->virtual_res.cx * dc->wndExtX));
  41     double ydim = fabs((double)dc->vportExtY * dc->virtual_size.cy /
  42                   (dc->virtual_res.cy * dc->wndExtY));
  43
  44     if (xdim > ydim)
  45     {
  46         INT mincx = (dc->vportExtX >= 0) ? 1 : -1;
  47         dc->vportExtX = floor(dc->vportExtX * ydim / xdim + 0.5);
  48         if (!dc->vportExtX) dc->vportExtX = mincx;
  49     }
  50     else
  51     {
  52         INT mincy = (dc->vportExtY >= 0) ? 1 : -1;
  53         dc->vportExtY = floor(dc->vportExtY * xdim / ydim + 0.5);
  54         if (!dc->vportExtY) dc->vportExtY = mincy;
  55     }
  56 }
  57
  58
  59 /***********************************************************************
  60  *           null driver fallback implementations
  61  */
  62
  63 BOOL nulldrv_OffsetViewportOrgEx( PHYSDEV dev, INT x, INT y, POINT *pt )
  64 {
  65     DC *dc = get_nulldrv_dc( dev );
  66
  67     if (pt)
  68     {
  69         pt->x = dc->vportOrgX;
  70         pt->y = dc->vportOrgY;
  71     }
  72     dc->vportOrgX += x;
  73     dc->vportOrgY += y;
  74     DC_UpdateXforms( dc );
  75     return TRUE;
  76 }
  77
  78 BOOL nulldrv_OffsetWindowOrgEx( PHYSDEV dev, INT x, INT y, POINT *pt )
  79 {
  80     DC *dc = get_nulldrv_dc( dev );
  81
  82     if (pt)
  83     {
  84         pt->x = dc->wndOrgX;
  85         pt->y = dc->wndOrgY;
  86     }
  87     dc->wndOrgX += x;
  88     dc->wndOrgY += y;
  89     DC_UpdateXforms( dc );
  90     return TRUE;
  91 }
  92
  93 BOOL nulldrv_ScaleViewportExtEx( PHYSDEV dev, INT x_num, INT x_denom, INT y_num, INT y_denom, SIZE *size )
  94 {
  95     DC *dc = get_nulldrv_dc( dev );
  96
  97     if (size)
  98     {
  99         size->cx = dc->vportExtX;
 100         size->cy = dc->vportExtY;
 101     }
 102     if (dc->MapMode != MM_ISOTROPIC && dc->MapMode != MM_ANISOTROPIC) return TRUE;
 103     if (!x_num || !x_denom || !y_num || !y_denom) return FALSE;
 104
 105     dc->vportExtX = (dc->vportExtX * x_num) / x_denom;
 106     dc->vportExtY = (dc->vportExtY * y_num) / y_denom;
 107     if (dc->vportExtX == 0) dc->vportExtX = 1;
 108     if (dc->vportExtY == 0) dc->vportExtY = 1;
 109     if (dc->MapMode == MM_ISOTROPIC) MAPPING_FixIsotropic( dc );
 110     DC_UpdateXforms( dc );
 111     return TRUE;
 112 }
 113
 114 BOOL nulldrv_ScaleWindowExtEx( PHYSDEV dev, INT x_num, INT x_denom, INT y_num, INT y_denom, SIZE *size )
 115 {
 116     DC *dc = get_nulldrv_dc( dev );
 117
 118     if (size)
 119     {
 120         size->cx = dc->wndExtX;
 121         size->cy = dc->wndExtY;
 122     }
 123     if (dc->MapMode != MM_ISOTROPIC && dc->MapMode != MM_ANISOTROPIC) return TRUE;
 124     if (!x_num || !x_denom || !y_num || !y_denom) return FALSE;
 125
 126     dc->wndExtX = (dc->wndExtX * x_num) / x_denom;
 127     dc->wndExtY = (dc->wndExtY * y_num) / y_denom;
 128     if (dc->wndExtX == 0) dc->wndExtX = 1;
 129     if (dc->wndExtY == 0) dc->wndExtY = 1;
 130     if (dc->MapMode == MM_ISOTROPIC) MAPPING_FixIsotropic( dc );
 131     DC_UpdateXforms( dc );
 132     return TRUE;
 133 }
 134
 135 INT nulldrv_SetMapMode( PHYSDEV dev, INT mode )
 136 {
 137     DC *dc = get_nulldrv_dc( dev );
 138     INT ret = dc->MapMode;
 139     INT horzSize, vertSize, horzRes, vertRes;
 140
 141     if (mode == dc->MapMode && (mode == MM_ISOTROPIC || mode == MM_ANISOTROPIC)) return ret;
 142
 143     horzSize = dc->virtual_size.cx;
 144     vertSize = dc->virtual_size.cy;
 145     horzRes  = dc->virtual_res.cx;
 146     vertRes  = dc->virtual_res.cy;
 147     switch (mode)
 148     {
 149     case MM_TEXT:
 150         dc->wndExtX   = 1;
 151         dc->wndExtY   = 1;
 152         dc->vportExtX = 1;
 153         dc->vportExtY = 1;
 154         break;
 155     case MM_LOMETRIC:
 156     case MM_ISOTROPIC:
 157         dc->wndExtX   = horzSize * 10;
 158         dc->wndExtY   = vertSize * 10;
 159         dc->vportExtX = horzRes;
 160         dc->vportExtY = -vertRes;
 161         break;
 162     case MM_HIMETRIC:
 163         dc->wndExtX   = horzSize * 100;
 164         dc->wndExtY   = vertSize * 100;
 165         dc->vportExtX = horzRes;
 166         dc->vportExtY = -vertRes;
 167         break;
 168     case MM_LOENGLISH:
 169         dc->wndExtX   = MulDiv(1000, horzSize, 254);
 170         dc->wndExtY   = MulDiv(1000, vertSize, 254);
 171         dc->vportExtX = horzRes;
 172         dc->vportExtY = -vertRes;
 173         break;
 174     case MM_HIENGLISH:
 175         dc->wndExtX   = MulDiv(10000, horzSize, 254);
 176         dc->wndExtY   = MulDiv(10000, vertSize, 254);
 177         dc->vportExtX = horzRes;
 178         dc->vportExtY = -vertRes;
 179         break;
 180     case MM_TWIPS:
 181         dc->wndExtX   = MulDiv(14400, horzSize, 254);
 182         dc->wndExtY   = MulDiv(14400, vertSize, 254);
 183         dc->vportExtX = horzRes;
 184         dc->vportExtY = -vertRes;
 185         break;
 186     case MM_ANISOTROPIC:
 187         break;
 188     default:
 189         return 0;
 190     }
 191     /* RTL layout is always MM_ANISOTROPIC */
 192     if (!(dc->layout & LAYOUT_RTL)) dc->MapMode = mode;
 193     DC_UpdateXforms( dc );
 194     return ret;
 195 }
 196
 197 BOOL nulldrv_SetViewportExtEx( PHYSDEV dev, INT cx, INT cy, SIZE *size )
 198 {
 199     DC *dc = get_nulldrv_dc( dev );
 200
 201     if (size)
 202     {
 203         size->cx = dc->vportExtX;
 204         size->cy = dc->vportExtY;
 205     }
 206     if (dc->MapMode != MM_ISOTROPIC && dc->MapMode != MM_ANISOTROPIC) return TRUE;
 207     if (!cx || !cy) return FALSE;
 208     dc->vportExtX = cx;
 209     dc->vportExtY = cy;
 210     if (dc->MapMode == MM_ISOTROPIC) MAPPING_FixIsotropic( dc );
 211     DC_UpdateXforms( dc );
 212     return TRUE;
 213 }
 214
 215 BOOL nulldrv_SetViewportOrgEx( PHYSDEV dev, INT x, INT y, POINT *pt )
 216 {
 217     DC *dc = get_nulldrv_dc( dev );
 218
 219     if (pt)
 220     {
 221         pt->x = dc->vportOrgX;
 222         pt->y = dc->vportOrgY;
 223     }
 224     dc->vportOrgX = x;
 225     dc->vportOrgY = y;
 226     DC_UpdateXforms( dc );
 227     return TRUE;
 228 }
 229
 230 BOOL nulldrv_SetWindowExtEx( PHYSDEV dev, INT cx, INT cy, SIZE *size )
 231 {
 232     DC *dc = get_nulldrv_dc( dev );
 233
 234     if (size)
 235     {
 236         size->cx = dc->wndExtX;
 237         size->cy = dc->wndExtY;
 238     }
 239     if (dc->MapMode != MM_ISOTROPIC && dc->MapMode != MM_ANISOTROPIC) return TRUE;
 240     if (!cx || !cy) return FALSE;
 241     dc->wndExtX = cx;
 242     dc->wndExtY = cy;
 243     /* The API docs say that you should call SetWindowExtEx before
 244        SetViewportExtEx. This advice does not imply that Windows
 245        doesn't ensure the isotropic mapping after SetWindowExtEx! */
 246     if (dc->MapMode == MM_ISOTROPIC) MAPPING_FixIsotropic( dc );
 247     DC_UpdateXforms( dc );
 248     return TRUE;
 249 }
 250
 251 BOOL nulldrv_SetWindowOrgEx( PHYSDEV dev, INT x, INT y, POINT *pt )
 252 {
 253     DC *dc = get_nulldrv_dc( dev );
 254
 255     if (pt)
 256     {
 257         pt->x = dc->wndOrgX;
 258         pt->y = dc->wndOrgY;
 259     }
 260     dc->wndOrgX = x;
 261     dc->wndOrgY = y;
 262     DC_UpdateXforms( dc );
 263     return TRUE;
 264 }
 265
 266 BOOL nulldrv_ModifyWorldTransform( PHYSDEV dev, const XFORM *xform, DWORD mode )
 267 {
 268     DC *dc = get_nulldrv_dc( dev );
 269
 270     switch (mode)
 271     {
 272     case MWT_IDENTITY:
 273         dc->xformWorld2Wnd.eM11 = 1.0f;
 274         dc->xformWorld2Wnd.eM12 = 0.0f;
 275         dc->xformWorld2Wnd.eM21 = 0.0f;
 276         dc->xformWorld2Wnd.eM22 = 1.0f;
 277         dc->xformWorld2Wnd.eDx  = 0.0f;
 278         dc->xformWorld2Wnd.eDy  = 0.0f;
 279         break;
 280     case MWT_LEFTMULTIPLY:
 281         CombineTransform( &dc->xformWorld2Wnd, xform, &dc->xformWorld2Wnd );
 282         break;
 283     case MWT_RIGHTMULTIPLY:
 284         CombineTransform( &dc->xformWorld2Wnd, &dc->xformWorld2Wnd, xform );
 285         break;
 286     default:
 287         return FALSE;
 288     }
 289     DC_UpdateXforms( dc );
 290     return TRUE;
 291 }
 292
 293 BOOL nulldrv_SetWorldTransform( PHYSDEV dev, const XFORM *xform )
 294 {
 295     DC *dc = get_nulldrv_dc( dev );
 296
 297     dc->xformWorld2Wnd = *xform;
 298     DC_UpdateXforms( dc );
 299     return TRUE;
 300 }
 301
 302 /***********************************************************************
 303  *           DPtoLP    (GDI32.@)
 304  */
 305 BOOL WINAPI DPtoLP( HDC hdc, LPPOINT points, INT count )
 306 {
 307     DC * dc = get_dc_ptr( hdc );
 308     if (!dc) return FALSE;
 309
 310     if (dc->vport2WorldValid)
 311     {
 312         while (count--)
 313         {
 314             double x = points->x;
 315             double y = points->y;
 316             points->x = floor( x * dc->xformVport2World.eM11 +
 317                                y * dc->xformVport2World.eM21 +
 318                                dc->xformVport2World.eDx + 0.5 );
 319             points->y = floor( x * dc->xformVport2World.eM12 +
 320                                y * dc->xformVport2World.eM22 +
 321                                dc->xformVport2World.eDy + 0.5 );
 322             points++;
 323         }
 324     }
 325     release_dc_ptr( dc );
 326     return (count < 0);
 327 }
 328
 329
 330 /***********************************************************************
 331  *           LPtoDP    (GDI32.@)
 332  */
 333 BOOL WINAPI LPtoDP( HDC hdc, LPPOINT points, INT count )
 334 {
 335     DC * dc = get_dc_ptr( hdc );
 336     if (!dc) return FALSE;
 337
 338     while (count--)
 339     {
 340         double x = points->x;
 341         double y = points->y;
 342         points->x = floor( x * dc->xformWorld2Vport.eM11 +
 343                            y * dc->xformWorld2Vport.eM21 +
 344                            dc->xformWorld2Vport.eDx + 0.5 );
 345         points->y = floor( x * dc->xformWorld2Vport.eM12 +
 346                            y * dc->xformWorld2Vport.eM22 +
 347                            dc->xformWorld2Vport.eDy + 0.5 );
 348         points++;
 349     }
 350     release_dc_ptr( dc );
 351     return TRUE;
 352 }
 353
 354
 355 /***********************************************************************
 356  *           SetMapMode    (GDI32.@)
 357  */
 358 INT WINAPI SetMapMode( HDC hdc, INT mode )
 359 {
 360     INT ret = 0;
 361     DC * dc = get_dc_ptr( hdc );
 362
 363     TRACE("%p %d\n", hdc, mode );
 364
 365     if (dc)
 366     {
 367         PHYSDEV physdev = GET_DC_PHYSDEV( dc, pSetMapMode );
 368         ret = physdev->funcs->pSetMapMode( physdev, mode );
 369         release_dc_ptr( dc );
 370     }
 371     return ret;
 372 }
 373
 374
 375 /***********************************************************************
 376  *           SetViewportExtEx    (GDI32.@)
 377  */
 378 BOOL WINAPI SetViewportExtEx( HDC hdc, INT x, INT y, LPSIZE size )
 379 {
 380     INT ret = FALSE;
 381     DC * dc = get_dc_ptr( hdc );
 382
 383     if (dc)
 384     {
 385         PHYSDEV physdev = GET_DC_PHYSDEV( dc, pSetViewportExtEx );
 386         ret = physdev->funcs->pSetViewportExtEx( physdev, x, y, size );
 387         release_dc_ptr( dc );
 388     }
 389     return ret;
 390 }
 391
 392
 393 /***********************************************************************
 394  *           SetViewportOrgEx    (GDI32.@)
 395  */
 396 BOOL WINAPI SetViewportOrgEx( HDC hdc, INT x, INT y, LPPOINT pt )
 397 {
 398     INT ret = FALSE;
 399     DC * dc = get_dc_ptr( hdc );
 400
 401     if (dc)
 402     {
 403         PHYSDEV physdev = GET_DC_PHYSDEV( dc, pSetViewportOrgEx );
 404         ret = physdev->funcs->pSetViewportOrgEx( physdev, x, y, pt );
 405         release_dc_ptr( dc );
 406     }
 407     return ret;
 408 }
 409
 410
 411 /***********************************************************************
 412  *           SetWindowExtEx    (GDI32.@)
 413  */
 414 BOOL WINAPI SetWindowExtEx( HDC hdc, INT x, INT y, LPSIZE size )
 415 {
 416     INT ret = FALSE;
 417     DC * dc = get_dc_ptr( hdc );
 418
 419     if (dc)
 420     {
 421         PHYSDEV physdev = GET_DC_PHYSDEV( dc, pSetWindowExtEx );
 422         ret = physdev->funcs->pSetWindowExtEx( physdev, x, y, size );
 423         release_dc_ptr( dc );
 424     }
 425     return ret;
 426 }
 427
 428
 429 /***********************************************************************
 430  *           SetWindowOrgEx    (GDI32.@)
 431  */
 432 BOOL WINAPI SetWindowOrgEx( HDC hdc, INT x, INT y, LPPOINT pt )
 433 {
 434     INT ret = FALSE;
 435     DC * dc = get_dc_ptr( hdc );
 436
 437     if (dc)
 438     {
 439         PHYSDEV physdev = GET_DC_PHYSDEV( dc, pSetWindowOrgEx );
 440         ret = physdev->funcs->pSetWindowOrgEx( physdev, x, y, pt );
 441         release_dc_ptr( dc );
 442     }
 443     return ret;
 444 }
 445
 446
 447 /***********************************************************************
 448  *           OffsetViewportOrgEx    (GDI32.@)
 449  */
 450 BOOL WINAPI OffsetViewportOrgEx( HDC hdc, INT x, INT y, LPPOINT pt)
 451 {
 452     INT ret = FALSE;
 453     DC * dc = get_dc_ptr( hdc );
 454
 455     if (dc)
 456     {
 457         PHYSDEV physdev = GET_DC_PHYSDEV( dc, pOffsetViewportOrgEx );
 458         ret = physdev->funcs->pOffsetViewportOrgEx( physdev, x, y, pt );
 459         release_dc_ptr( dc );
 460     }
 461     return ret;
 462 }
 463
 464
 465 /***********************************************************************
 466  *           OffsetWindowOrgEx    (GDI32.@)
 467  */
 468 BOOL WINAPI OffsetWindowOrgEx( HDC hdc, INT x, INT y, LPPOINT pt )
 469 {
 470     INT ret = FALSE;
 471     DC * dc = get_dc_ptr( hdc );
 472
 473     if (dc)
 474     {
 475         PHYSDEV physdev = GET_DC_PHYSDEV( dc, pOffsetWindowOrgEx );
 476         ret = physdev->funcs->pOffsetWindowOrgEx( physdev, x, y, pt );
 477         release_dc_ptr( dc );
 478     }
 479     return ret;
 480 }
 481
 482
 483 /***********************************************************************
 484  *           ScaleViewportExtEx    (GDI32.@)
 485  */
 486 BOOL WINAPI ScaleViewportExtEx( HDC hdc, INT xNum, INT xDenom,
 487                                     INT yNum, INT yDenom, LPSIZE size )
 488 {
 489     INT ret = FALSE;
 490     DC * dc = get_dc_ptr( hdc );
 491
 492     if (dc)
 493     {
 494         PHYSDEV physdev = GET_DC_PHYSDEV( dc, pScaleViewportExtEx );
 495         ret = physdev->funcs->pScaleViewportExtEx( physdev, xNum, xDenom, yNum, yDenom, size );
 496         release_dc_ptr( dc );
 497     }
 498     return ret;
 499 }
 500
 501
 502 /***********************************************************************
 503  *           ScaleWindowExtEx    (GDI32.@)
 504  */
 505 BOOL WINAPI ScaleWindowExtEx( HDC hdc, INT xNum, INT xDenom,
 506                                   INT yNum, INT yDenom, LPSIZE size )
 507 {
 508     INT ret = FALSE;
 509     DC * dc = get_dc_ptr( hdc );
 510
 511     if (dc)
 512     {
 513         PHYSDEV physdev = GET_DC_PHYSDEV( dc, pScaleWindowExtEx );
 514         ret = physdev->funcs->pScaleWindowExtEx( physdev, xNum, xDenom, yNum, yDenom, size );
 515         release_dc_ptr( dc );
 516     }
 517     return ret;
 518 }
 519
 520
 521 /****************************************************************************
 522  *           ModifyWorldTransform   (GDI32.@)
 523  */
 524 BOOL WINAPI ModifyWorldTransform( HDC hdc, const XFORM *xform, DWORD mode )
 525 {
 526     BOOL ret = FALSE;
 527     DC *dc;
 528
 529     if (!xform && mode != MWT_IDENTITY) return FALSE;
 530     if ((dc = get_dc_ptr( hdc )))
 531     {
 532         PHYSDEV physdev = GET_DC_PHYSDEV( dc, pModifyWorldTransform );
 533         if (dc->GraphicsMode == GM_ADVANCED)
 534             ret = physdev->funcs->pModifyWorldTransform( physdev, xform, mode );
 535         release_dc_ptr( dc );
 536     }
 537     return ret;
 538 }
 539
 540
 541 /***********************************************************************
 542  *           SetWorldTransform    (GDI32.@)
 543  */
 544 BOOL WINAPI SetWorldTransform( HDC hdc, const XFORM *xform )
 545 {
 546     BOOL ret = FALSE;
 547     DC *dc;
 548
 549     if (!xform) return FALSE;
 550     /* The transform must conform to (eM11 * eM22 != eM12 * eM21) requirement */
 551     if (xform->eM11 * xform->eM22 == xform->eM12 * xform->eM21) return FALSE;
 552
 553     TRACE("eM11 %f eM12 %f eM21 %f eM22 %f eDx %f eDy %f\n",
 554         xform->eM11, xform->eM12, xform->eM21, xform->eM22, xform->eDx, xform->eDy);
 555
 556     if ((dc = get_dc_ptr( hdc )))
 557     {
 558         PHYSDEV physdev = GET_DC_PHYSDEV( dc, pSetWorldTransform );
 559         if (dc->GraphicsMode == GM_ADVANCED)
 560             ret = physdev->funcs->pSetWorldTransform( physdev, xform );
 561         release_dc_ptr( dc );
 562     }
 563     return ret;
 564 }
 565
 566
 567 /***********************************************************************
 568  *           SetVirtualResolution   (GDI32.@)
 569  *
 570  * Undocumented on msdn.
 571  *
 572  * Changes the values of screen size in pixels and millimeters used by
 573  * the mapping mode functions.
 574  *
 575  * PARAMS
 576  *     hdc       [I] Device context
 577  *     horz_res  [I] Width in pixels  (equivalent to HORZRES device cap).
 578  *     vert_res  [I] Height in pixels (equivalent to VERTRES device cap).
 579  *     horz_size [I] Width in mm      (equivalent to HORZSIZE device cap).
 580  *     vert_size [I] Height in mm     (equivalent to VERTSIZE device cap).
 581  *
 582  * RETURNS
 583  *    TRUE if successful.
 584  *    FALSE if any (but not all) of the last four params are zero.
 585  *
 586  * NOTES
 587  *    This doesn't change the values returned by GetDeviceCaps, just the
 588  *    scaling of the mapping modes.
 589  *
 590  *    Calling with the last four params equal to zero sets the values
 591  *    back to their defaults obtained by calls to GetDeviceCaps.
 592  */
 593 BOOL WINAPI SetVirtualResolution(HDC hdc, DWORD horz_res, DWORD vert_res,
 594                                  DWORD horz_size, DWORD vert_size)
 595 {
 596     DC * dc;
 597     TRACE("(%p %d %d %d %d)\n", hdc, horz_res, vert_res, horz_size, vert_size);
 598
 599     if(horz_res == 0 && vert_res == 0 && horz_size == 0 && vert_size == 0)
 600     {
 601         horz_res  = GetDeviceCaps(hdc, HORZRES);
 602         vert_res  = GetDeviceCaps(hdc, VERTRES);
 603         horz_size = GetDeviceCaps(hdc, HORZSIZE);
 604         vert_size = GetDeviceCaps(hdc, VERTSIZE);
 605     }
 606     else if(horz_res == 0 || vert_res == 0 || horz_size == 0 || vert_size == 0)
 607         return FALSE;
 608
 609     dc = get_dc_ptr( hdc );
 610     if (!dc) return FALSE;
 611
 612     dc->virtual_res.cx  = horz_res;
 613     dc->virtual_res.cy  = vert_res;
 614     dc->virtual_size.cx = horz_size;
 615     dc->virtual_size.cy = vert_size;
 616
 617     release_dc_ptr( dc );
 618     return TRUE;
 619 }