dlls/gdi/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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 #include "gdi.h"
  22 #include "wownt32.h"
  23 #include "gdi_private.h"
  24 #include "wine/debug.h"
  25
  26 WINE_DEFAULT_DEBUG_CHANNEL(gdi);
  27
  28
  29 /***********************************************************************
  30  *           MAPPING_FixIsotropic
  31  *
  32  * Fix viewport extensions for isotropic mode.
  33  */
  34 void MAPPING_FixIsotropic( DC * dc )
  35 {
  36     double xdim = fabs((double)dc->vportExtX * GetDeviceCaps( dc->hSelf, HORZSIZE ) /
  37                   (GetDeviceCaps( dc->hSelf, HORZRES ) * dc->wndExtX));
  38     double ydim = fabs((double)dc->vportExtY * GetDeviceCaps( dc->hSelf, VERTSIZE ) /
  39                   (GetDeviceCaps( dc->hSelf, VERTRES ) * dc->wndExtY));
  40
  41     if (xdim > ydim)
  42     {
  43         INT mincx = (dc->vportExtX >= 0) ? 1 : -1;
  44         dc->vportExtX = floor(dc->vportExtX * ydim / xdim + 0.5);
  45         if (!dc->vportExtX) dc->vportExtX = mincx;
  46     }
  47     else
  48     {
  49         INT mincy = (dc->vportExtY >= 0) ? 1 : -1;
  50         dc->vportExtY = floor(dc->vportExtY * xdim / ydim + 0.5);
  51         if (!dc->vportExtY) dc->vportExtY = mincy;
  52     }
  53 }
  54
  55
  56 /***********************************************************************
  57  *           DPtoLP    (GDI.67)
  58  */
  59 BOOL16 WINAPI DPtoLP16( HDC16 hdc, LPPOINT16 points, INT16 count )
  60 {
  61     DC * dc = DC_GetDCPtr( HDC_32(hdc) );
  62     if (!dc) return FALSE;
  63
  64     while (count--)
  65     {
  66         points->x = MulDiv( points->x - dc->vportOrgX, dc->wndExtX, dc->vportExtX ) + dc->wndOrgX;
  67         points->y = MulDiv( points->y - dc->vportOrgY, dc->wndExtY, dc->vportExtY ) + dc->wndOrgY;
  68         points++;
  69     }
  70     GDI_ReleaseObj( HDC_32(hdc) );
  71     return TRUE;
  72 }
  73
  74
  75 /***********************************************************************
  76  *           DPtoLP    (GDI32.@)
  77  */
  78 BOOL WINAPI DPtoLP( HDC hdc, LPPOINT points, INT count )
  79 {
  80     DC * dc = DC_GetDCPtr( hdc );
  81     if (!dc) return FALSE;
  82
  83     if (dc->vport2WorldValid)
  84     {
  85         while (count--)
  86         {
  87             FLOAT x = points->x;
  88             FLOAT y = points->y;
  89             points->x = floor( x * dc->xformVport2World.eM11 +
  90                                y * dc->xformVport2World.eM21 +
  91                                dc->xformVport2World.eDx + 0.5 );
  92             points->y = floor( x * dc->xformVport2World.eM12 +
  93                                y * dc->xformVport2World.eM22 +
  94                                dc->xformVport2World.eDy + 0.5 );
  95             points++;
  96         }
  97     }
  98     GDI_ReleaseObj( hdc );
  99     return (count < 0);
 100 }
 101
 102
 103 /***********************************************************************
 104  *           LPtoDP    (GDI.99)
 105  */
 106 BOOL16 WINAPI LPtoDP16( HDC16 hdc, LPPOINT16 points, INT16 count )
 107 {
 108     DC * dc = DC_GetDCPtr( HDC_32(hdc) );
 109     if (!dc) return FALSE;
 110
 111     while (count--)
 112     {
 113         points->x = MulDiv( points->x - dc->wndOrgX, dc->vportExtX, dc->wndExtX ) + dc->vportOrgX;
 114         points->y = MulDiv( points->y - dc->wndOrgY, dc->vportExtY, dc->wndExtY ) + dc->vportOrgY;
 115         points++;
 116     }
 117     GDI_ReleaseObj( HDC_32(hdc) );
 118     return TRUE;
 119 }
 120
 121
 122 /***********************************************************************
 123  *           LPtoDP    (GDI32.@)
 124  */
 125 BOOL WINAPI LPtoDP( HDC hdc, LPPOINT points, INT count )
 126 {
 127     DC * dc = DC_GetDCPtr( hdc );
 128     if (!dc) return FALSE;
 129
 130     while (count--)
 131     {
 132         FLOAT x = points->x;
 133         FLOAT y = points->y;
 134         points->x = floor( x * dc->xformWorld2Vport.eM11 +
 135                            y * dc->xformWorld2Vport.eM21 +
 136                            dc->xformWorld2Vport.eDx + 0.5 );
 137         points->y = floor( x * dc->xformWorld2Vport.eM12 +
 138                            y * dc->xformWorld2Vport.eM22 +
 139                            dc->xformWorld2Vport.eDy + 0.5 );
 140         points++;
 141     }
 142     GDI_ReleaseObj( hdc );
 143     return TRUE;
 144 }
 145
 146
 147 /***********************************************************************
 148  *           SetMapMode    (GDI32.@)
 149  */
 150 INT WINAPI SetMapMode( HDC hdc, INT mode )
 151 {
 152     INT ret;
 153     INT horzSize, vertSize, horzRes, vertRes;
 154
 155     DC * dc = DC_GetDCPtr( hdc );
 156     if (!dc) return 0;
 157     if (dc->funcs->pSetMapMode)
 158     {
 159         if((ret = dc->funcs->pSetMapMode( dc->physDev, mode )) != TRUE)
 160         {
 161             if(ret == GDI_NO_MORE_WORK)
 162                 ret = TRUE;
 163             goto done;
 164         }
 165     }
 166
 167     TRACE("%p %d\n", hdc, mode );
 168
 169     ret = dc->MapMode;
 170
 171     if (mode == dc->MapMode && (mode == MM_ISOTROPIC || mode == MM_ANISOTROPIC))
 172         goto done;
 173
 174     horzSize = GetDeviceCaps( hdc, HORZSIZE );
 175     vertSize = GetDeviceCaps( hdc, VERTSIZE );
 176     horzRes  = GetDeviceCaps( hdc, HORZRES );
 177     vertRes  = GetDeviceCaps( hdc, VERTRES );
 178     switch(mode)
 179     {
 180     case MM_TEXT:
 181         dc->wndExtX   = 1;
 182         dc->wndExtY   = 1;
 183         dc->vportExtX = 1;
 184         dc->vportExtY = 1;
 185         break;
 186     case MM_LOMETRIC:
 187     case MM_ISOTROPIC:
 188         dc->wndExtX   = horzSize * 10;
 189         dc->wndExtY   = vertSize * 10;
 190         dc->vportExtX = horzRes;
 191         dc->vportExtY = -vertRes;
 192         break;
 193     case MM_HIMETRIC:
 194         dc->wndExtX   = horzSize * 100;
 195         dc->wndExtY   = vertSize * 100;
 196         dc->vportExtX = horzRes;
 197         dc->vportExtY = -vertRes;
 198         break;
 199     case MM_LOENGLISH:
 200         dc->wndExtX   = MulDiv(1000, horzSize, 254);
 201         dc->wndExtY   = MulDiv(1000, vertSize, 254);
 202         dc->vportExtX = horzRes;
 203         dc->vportExtY = -vertRes;
 204         break;
 205     case MM_HIENGLISH:
 206         dc->wndExtX   = MulDiv(10000, horzSize, 254);
 207         dc->wndExtY   = MulDiv(10000, vertSize, 254);
 208         dc->vportExtX = horzRes;
 209         dc->vportExtY = -vertRes;
 210         break;
 211     case MM_TWIPS:
 212         dc->wndExtX   = MulDiv(14400, horzSize, 254);
 213         dc->wndExtY   = MulDiv(14400, vertSize, 254);
 214         dc->vportExtX = horzRes;
 215         dc->vportExtY = -vertRes;
 216         break;
 217     case MM_ANISOTROPIC:
 218         break;
 219     default:
 220         goto done;
 221     }
 222     dc->MapMode = mode;
 223     DC_UpdateXforms( dc );
 224  done:
 225     GDI_ReleaseObj( hdc );
 226     return ret;
 227 }
 228
 229
 230 /***********************************************************************
 231  *           SetViewportExtEx    (GDI32.@)
 232  */
 233 BOOL WINAPI SetViewportExtEx( HDC hdc, INT x, INT y, LPSIZE size )
 234 {
 235     INT ret = TRUE;
 236     DC * dc = DC_GetDCPtr( hdc );
 237     if (!dc) return FALSE;
 238     if (dc->funcs->pSetViewportExt)
 239     {
 240         if((ret = dc->funcs->pSetViewportExt( dc->physDev, x, y )) != TRUE)
 241         {
 242             if(ret == GDI_NO_MORE_WORK)
 243                 ret = TRUE;
 244             goto done;
 245         }
 246     }
 247     if (size)
 248     {
 249         size->cx = dc->vportExtX;
 250         size->cy = dc->vportExtY;
 251     }
 252     if ((dc->MapMode != MM_ISOTROPIC) && (dc->MapMode != MM_ANISOTROPIC))
 253         goto done;
 254     if (!x || !y)
 255     {
 256         ret = FALSE;
 257         goto done;
 258     }
 259     dc->vportExtX = x;
 260     dc->vportExtY = y;
 261     if (dc->MapMode == MM_ISOTROPIC) MAPPING_FixIsotropic( dc );
 262     DC_UpdateXforms( dc );
 263  done:
 264     GDI_ReleaseObj( hdc );
 265     return ret;
 266 }
 267
 268
 269 /***********************************************************************
 270  *           SetViewportOrgEx    (GDI32.@)
 271  */
 272 BOOL WINAPI SetViewportOrgEx( HDC hdc, INT x, INT y, LPPOINT pt )
 273 {
 274     INT ret = TRUE;
 275     DC * dc = DC_GetDCPtr( hdc );
 276     if (!dc) return FALSE;
 277     if (dc->funcs->pSetViewportOrg)
 278     {
 279         if((ret = dc->funcs->pSetViewportOrg( dc->physDev, x, y )) != TRUE)
 280         {
 281             if(ret == GDI_NO_MORE_WORK)
 282                 ret = TRUE;
 283             goto done;
 284         }
 285     }
 286     if (pt)
 287     {
 288         pt->x = dc->vportOrgX;
 289         pt->y = dc->vportOrgY;
 290     }
 291     dc->vportOrgX = x;
 292     dc->vportOrgY = y;
 293     DC_UpdateXforms( dc );
 294
 295  done:
 296     GDI_ReleaseObj( hdc );
 297     return ret;
 298 }
 299
 300
 301 /***********************************************************************
 302  *           SetWindowExtEx    (GDI32.@)
 303  */
 304 BOOL WINAPI SetWindowExtEx( HDC hdc, INT x, INT y, LPSIZE size )
 305 {
 306     INT ret = TRUE;
 307     DC * dc = DC_GetDCPtr( hdc );
 308     if (!dc) return FALSE;
 309     if (dc->funcs->pSetWindowExt)
 310     {
 311         if((ret = dc->funcs->pSetWindowExt( dc->physDev, x, y )) != TRUE)
 312         {
 313             if(ret == GDI_NO_MORE_WORK)
 314                 ret = TRUE;
 315             goto done;
 316         }
 317     }
 318     if (size)
 319     {
 320         size->cx = dc->wndExtX;
 321         size->cy = dc->wndExtY;
 322     }
 323     if ((dc->MapMode != MM_ISOTROPIC) && (dc->MapMode != MM_ANISOTROPIC))
 324         goto done;
 325     if (!x || !y)
 326     {
 327         ret = FALSE;
 328         goto done;
 329     }
 330     dc->wndExtX = x;
 331     dc->wndExtY = y;
 332     /* The API docs say that you should call SetWindowExtEx before
 333        SetViewportExtEx. This advice does not imply that Windows
 334        doesn't ensure the isotropic mapping after SetWindowExtEx! */
 335     if (dc->MapMode == MM_ISOTROPIC) MAPPING_FixIsotropic( dc );
 336     DC_UpdateXforms( dc );
 337  done:
 338     GDI_ReleaseObj( hdc );
 339     return ret;
 340 }
 341
 342
 343 /***********************************************************************
 344  *           SetWindowOrgEx    (GDI32.@)
 345  */
 346 BOOL WINAPI SetWindowOrgEx( HDC hdc, INT x, INT y, LPPOINT pt )
 347 {
 348     INT ret = TRUE;
 349     DC * dc = DC_GetDCPtr( hdc );
 350     if (!dc) return FALSE;
 351     if (dc->funcs->pSetWindowOrg)
 352     {
 353         if((ret = dc->funcs->pSetWindowOrg( dc->physDev, x, y )) != TRUE)
 354         {
 355             if(ret == GDI_NO_MORE_WORK)
 356                 ret = TRUE;
 357             goto done;
 358         }
 359     }
 360     if (pt)
 361     {
 362         pt->x = dc->wndOrgX;
 363         pt->y = dc->wndOrgY;
 364     }
 365     dc->wndOrgX = x;
 366     dc->wndOrgY = y;
 367     DC_UpdateXforms( dc );
 368  done:
 369     GDI_ReleaseObj( hdc );
 370     return ret;
 371 }
 372
 373
 374 /***********************************************************************
 375  *           OffsetViewportOrgEx    (GDI32.@)
 376  */
 377 BOOL WINAPI OffsetViewportOrgEx( HDC hdc, INT x, INT y, LPPOINT pt)
 378 {
 379     INT ret = TRUE;
 380     DC * dc = DC_GetDCPtr( hdc );
 381     if (!dc) return FALSE;
 382     if (dc->funcs->pOffsetViewportOrg)
 383     {
 384         if((ret = dc->funcs->pOffsetViewportOrg( dc->physDev, x, y )) != TRUE)
 385         {
 386             if(ret == GDI_NO_MORE_WORK)
 387                 ret = TRUE;
 388             goto done;
 389         }
 390     }
 391     if (pt)
 392     {
 393         pt->x = dc->vportOrgX;
 394         pt->y = dc->vportOrgY;
 395     }
 396     dc->vportOrgX += x;
 397     dc->vportOrgY += y;
 398     DC_UpdateXforms( dc );
 399  done:
 400     GDI_ReleaseObj( hdc );
 401     return ret;
 402 }
 403
 404
 405 /***********************************************************************
 406  *           OffsetWindowOrgEx    (GDI32.@)
 407  */
 408 BOOL WINAPI OffsetWindowOrgEx( HDC hdc, INT x, INT y, LPPOINT pt )
 409 {
 410     INT ret = TRUE;
 411     DC * dc = DC_GetDCPtr( hdc );
 412     if (!dc) return FALSE;
 413     if (dc->funcs->pOffsetWindowOrg)
 414     {
 415         if((ret = dc->funcs->pOffsetWindowOrg( dc->physDev, x, y )) != TRUE)
 416         {
 417             if(ret == GDI_NO_MORE_WORK)
 418                 ret = TRUE;
 419             goto done;
 420         }
 421     }
 422     if (pt)
 423     {
 424         pt->x = dc->wndOrgX;
 425         pt->y = dc->wndOrgY;
 426     }
 427     dc->wndOrgX += x;
 428     dc->wndOrgY += y;
 429     DC_UpdateXforms( dc );
 430  done:
 431     GDI_ReleaseObj( hdc );
 432     return ret;
 433 }
 434
 435
 436 /***********************************************************************
 437  *           ScaleViewportExtEx    (GDI32.@)
 438  */
 439 BOOL WINAPI ScaleViewportExtEx( HDC hdc, INT xNum, INT xDenom,
 440                                     INT yNum, INT yDenom, LPSIZE size )
 441 {
 442     INT ret = TRUE;
 443     DC * dc = DC_GetDCPtr( hdc );
 444     if (!dc) return FALSE;
 445     if (dc->funcs->pScaleViewportExt)
 446     {
 447         if((ret = dc->funcs->pScaleViewportExt( dc->physDev, xNum, xDenom, yNum, yDenom )) != TRUE)
 448         {
 449             if(ret == GDI_NO_MORE_WORK)
 450                 ret = TRUE;
 451             goto done;
 452         }
 453     }
 454     if (size)
 455     {
 456         size->cx = dc->vportExtX;
 457         size->cy = dc->vportExtY;
 458     }
 459     if ((dc->MapMode != MM_ISOTROPIC) && (dc->MapMode != MM_ANISOTROPIC))
 460         goto done;
 461     if (!xNum || !xDenom || !xNum || !yDenom)
 462     {
 463         ret = FALSE;
 464         goto done;
 465     }
 466     dc->vportExtX = (dc->vportExtX * xNum) / xDenom;
 467     dc->vportExtY = (dc->vportExtY * yNum) / yDenom;
 468     if (dc->vportExtX == 0) dc->vportExtX = 1;
 469     if (dc->vportExtY == 0) dc->vportExtY = 1;
 470     if (dc->MapMode == MM_ISOTROPIC) MAPPING_FixIsotropic( dc );
 471     DC_UpdateXforms( dc );
 472  done:
 473     GDI_ReleaseObj( hdc );
 474     return ret;
 475 }
 476
 477
 478 /***********************************************************************
 479  *           ScaleWindowExtEx    (GDI32.@)
 480  */
 481 BOOL WINAPI ScaleWindowExtEx( HDC hdc, INT xNum, INT xDenom,
 482                                   INT yNum, INT yDenom, LPSIZE size )
 483 {
 484     INT ret = TRUE;
 485     DC * dc = DC_GetDCPtr( hdc );
 486     if (!dc) return FALSE;
 487     if (dc->funcs->pScaleWindowExt)
 488     {
 489         if((ret = dc->funcs->pScaleWindowExt( dc->physDev, xNum, xDenom, yNum, yDenom )) != TRUE)
 490         {
 491             if(ret == GDI_NO_MORE_WORK)
 492                 ret = TRUE;
 493             goto done;
 494         }
 495     }
 496     if (size)
 497     {
 498         size->cx = dc->wndExtX;
 499         size->cy = dc->wndExtY;
 500     }
 501     if ((dc->MapMode != MM_ISOTROPIC) && (dc->MapMode != MM_ANISOTROPIC))
 502         goto done;
 503     if (!xNum || !xDenom || !xNum || !yDenom)
 504     {
 505         ret = FALSE;
 506         goto done;
 507     }
 508     dc->wndExtX = (dc->wndExtX * xNum) / xDenom;
 509     dc->wndExtY = (dc->wndExtY * yNum) / yDenom;
 510     if (dc->wndExtX == 0) dc->wndExtX = 1;
 511     if (dc->wndExtY == 0) dc->wndExtY = 1;
 512     if (dc->MapMode == MM_ISOTROPIC) MAPPING_FixIsotropic( dc );
 513     DC_UpdateXforms( dc );
 514  done:
 515     GDI_ReleaseObj( hdc );
 516     return ret;
 517 }