graphics/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 "wine/debug.h"
  23
  24 WINE_DEFAULT_DEBUG_CHANNEL(gdi);
  25
  26
  27 /***********************************************************************
  28  *           MAPPING_FixIsotropic
  29  *
  30  * Fix viewport extensions for isotropic mode.
  31  */
  32 void MAPPING_FixIsotropic( DC * dc )
  33 {
  34     double xdim = (double)dc->vportExtX * GetDeviceCaps( dc->hSelf, HORZSIZE ) /
  35                   (GetDeviceCaps( dc->hSelf, HORZRES ) * dc->wndExtX);
  36     double ydim = (double)dc->vportExtY * GetDeviceCaps( dc->hSelf, VERTSIZE ) /
  37                   (GetDeviceCaps( dc->hSelf, VERTRES ) * dc->wndExtY);
  38     if (xdim > ydim)
  39     {
  40         dc->vportExtX = dc->vportExtX * fabs( ydim / xdim );
  41         if (!dc->vportExtX) dc->vportExtX = 1;
  42     }
  43     else
  44     {
  45         dc->vportExtY = dc->vportExtY * fabs( xdim / ydim );
  46         if (!dc->vportExtY) dc->vportExtY = 1;
  47     }
  48 }
  49
  50
  51 /***********************************************************************
  52  *           DPtoLP    (GDI.67)
  53  */
  54 BOOL16 WINAPI DPtoLP16( HDC16 hdc, LPPOINT16 points, INT16 count )
  55 {
  56     DC * dc = DC_GetDCPtr( hdc );
  57     if (!dc) return FALSE;
  58
  59     while (count--)
  60     {
  61         points->x = MulDiv( points->x - dc->vportOrgX, dc->wndExtX, dc->vportExtX ) + dc->wndOrgX;
  62         points->y = MulDiv( points->y - dc->vportOrgY, dc->wndExtY, dc->vportExtY ) + dc->wndOrgY;
  63         points++;
  64     }
  65     GDI_ReleaseObj( hdc );
  66     return TRUE;
  67 }
  68
  69
  70 /***********************************************************************
  71  *           DPtoLP    (GDI32.@)
  72  */
  73 BOOL WINAPI DPtoLP( HDC hdc, LPPOINT points, INT count )
  74 {
  75     DC * dc = DC_GetDCPtr( hdc );
  76     if (!dc) return FALSE;
  77
  78     if (dc->vport2WorldValid)
  79     {
  80         while (count--)
  81         {
  82             FLOAT x = points->x;
  83             FLOAT y = points->y;
  84             points->x = floor( x * dc->xformVport2World.eM11 +
  85                                y * dc->xformVport2World.eM21 +
  86                                dc->xformVport2World.eDx + 0.5 );
  87             points->y = floor( x * dc->xformVport2World.eM12 +
  88                                y * dc->xformVport2World.eM22 +
  89                                dc->xformVport2World.eDy + 0.5 );
  90             points++;
  91         }
  92     }
  93     GDI_ReleaseObj( hdc );
  94     return (count < 0);
  95 }
  96
  97
  98 /***********************************************************************
  99  *           LPtoDP    (GDI.99)
 100  */
 101 BOOL16 WINAPI LPtoDP16( HDC16 hdc, LPPOINT16 points, INT16 count )
 102 {
 103     DC * dc = DC_GetDCPtr( hdc );
 104     if (!dc) return FALSE;
 105
 106     while (count--)
 107     {
 108         points->x = MulDiv( points->x - dc->wndOrgX, dc->vportExtX, dc->wndExtX ) + dc->vportOrgX;
 109         points->y = MulDiv( points->y - dc->wndOrgY, dc->vportExtY, dc->wndExtY ) + dc->vportOrgY;
 110         points++;
 111     }
 112     GDI_ReleaseObj( hdc );
 113     return TRUE;
 114 }
 115
 116
 117 /***********************************************************************
 118  *           LPtoDP    (GDI32.@)
 119  */
 120 BOOL WINAPI LPtoDP( HDC hdc, LPPOINT points, INT count )
 121 {
 122     DC * dc = DC_GetDCPtr( hdc );
 123     if (!dc) return FALSE;
 124
 125     while (count--)
 126     {
 127         FLOAT x = points->x;
 128         FLOAT y = points->y;
 129         points->x = floor( x * dc->xformWorld2Vport.eM11 +
 130                            y * dc->xformWorld2Vport.eM21 +
 131                            dc->xformWorld2Vport.eDx + 0.5 );
 132         points->y = floor( x * dc->xformWorld2Vport.eM12 +
 133                            y * dc->xformWorld2Vport.eM22 +
 134                            dc->xformWorld2Vport.eDy + 0.5 );
 135         points++;
 136     }
 137     GDI_ReleaseObj( hdc );
 138     return TRUE;
 139 }
 140
 141
 142 /***********************************************************************
 143  *           SetMapMode    (GDI32.@)
 144  */
 145 INT WINAPI SetMapMode( HDC hdc, INT mode )
 146 {
 147     INT ret;
 148     INT horzSize, vertSize, horzRes, vertRes;
 149
 150     DC * dc = DC_GetDCPtr( hdc );
 151     if (!dc) return 0;
 152     if (dc->funcs->pSetMapMode)
 153     {
 154         if((ret = dc->funcs->pSetMapMode( dc->physDev, mode )) != TRUE)
 155         {
 156             if(ret == GDI_NO_MORE_WORK)
 157                 ret = TRUE;
 158             goto done;
 159         }
 160     }
 161
 162     TRACE("%04x %d\n", hdc, mode );
 163
 164     ret = dc->MapMode;
 165     horzSize = GetDeviceCaps( hdc, HORZSIZE );
 166     vertSize = GetDeviceCaps( hdc, VERTSIZE );
 167     horzRes  = GetDeviceCaps( hdc, HORZRES );
 168     vertRes  = GetDeviceCaps( hdc, VERTRES );
 169     switch(mode)
 170     {
 171     case MM_TEXT:
 172         dc->wndExtX   = 1;
 173         dc->wndExtY   = 1;
 174         dc->vportExtX = 1;
 175         dc->vportExtY = 1;
 176         break;
 177     case MM_LOMETRIC:
 178     case MM_ISOTROPIC:
 179         dc->wndExtX   = horzSize;
 180         dc->wndExtY   = vertSize;
 181         dc->vportExtX = horzRes / 10;
 182         dc->vportExtY = vertRes / -10;
 183         break;
 184     case MM_HIMETRIC:
 185         dc->wndExtX   = horzSize * 10;
 186         dc->wndExtY   = vertSize * 10;
 187         dc->vportExtX = horzRes / 10;
 188         dc->vportExtY = vertRes / -10;
 189         break;
 190     case MM_LOENGLISH:
 191         dc->wndExtX   = horzSize;
 192         dc->wndExtY   = vertSize;
 193         dc->vportExtX = 254L * horzRes / 1000;
 194         dc->vportExtY = -254L * vertRes / 1000;
 195         break;
 196     case MM_HIENGLISH:
 197         dc->wndExtX   = horzSize * 10;
 198         dc->wndExtY   = vertSize * 10;
 199         dc->vportExtX = 254L * horzRes / 1000;
 200         dc->vportExtY = -254L * vertRes / 1000;
 201         break;
 202     case MM_TWIPS:
 203         dc->wndExtX   = 144L * horzSize / 10;
 204         dc->wndExtY   = 144L * vertSize / 10;
 205         dc->vportExtX = 254L * horzRes / 1000;
 206         dc->vportExtY = -254L * vertRes / 1000;
 207         break;
 208     case MM_ANISOTROPIC:
 209         break;
 210     default:
 211         goto done;
 212     }
 213     dc->MapMode = mode;
 214     DC_UpdateXforms( dc );
 215  done:
 216     GDI_ReleaseObj( hdc );
 217     return ret;
 218 }
 219
 220
 221 /***********************************************************************
 222  *           SetViewportExtEx    (GDI32.@)
 223  */
 224 BOOL WINAPI SetViewportExtEx( HDC hdc, INT x, INT y, LPSIZE size )
 225 {
 226     INT ret = TRUE;
 227     DC * dc = DC_GetDCPtr( hdc );
 228     if (!dc) return FALSE;
 229     if (dc->funcs->pSetViewportExt)
 230     {
 231         if((ret = dc->funcs->pSetViewportExt( dc->physDev, x, y )) != TRUE)
 232         {
 233             if(ret == GDI_NO_MORE_WORK)
 234                 ret = TRUE;
 235             goto done;
 236         }
 237     }
 238     if (size)
 239     {
 240         size->cx = dc->vportExtX;
 241         size->cy = dc->vportExtY;
 242     }
 243     if ((dc->MapMode != MM_ISOTROPIC) && (dc->MapMode != MM_ANISOTROPIC))
 244         goto done;
 245     if (!x || !y)
 246     {
 247         ret = FALSE;
 248         goto done;
 249     }
 250     dc->vportExtX = x;
 251     dc->vportExtY = y;
 252     if (dc->MapMode == MM_ISOTROPIC) MAPPING_FixIsotropic( dc );
 253     DC_UpdateXforms( dc );
 254  done:
 255     GDI_ReleaseObj( hdc );
 256     return ret;
 257 }
 258
 259
 260 /***********************************************************************
 261  *           SetViewportOrgEx    (GDI32.@)
 262  */
 263 BOOL WINAPI SetViewportOrgEx( HDC hdc, INT x, INT y, LPPOINT pt )
 264 {
 265     INT ret = TRUE;
 266     DC * dc = DC_GetDCPtr( hdc );
 267     if (!dc) return FALSE;
 268     if (dc->funcs->pSetViewportOrg)
 269     {
 270         if((ret = dc->funcs->pSetViewportOrg( dc->physDev, x, y )) != TRUE)
 271         {
 272             if(ret == GDI_NO_MORE_WORK)
 273                 ret = TRUE;
 274             goto done;
 275         }
 276     }
 277     if (pt)
 278     {
 279         pt->x = dc->vportOrgX;
 280         pt->y = dc->vportOrgY;
 281     }
 282     dc->vportOrgX = x;
 283     dc->vportOrgY = y;
 284     DC_UpdateXforms( dc );
 285
 286  done:
 287     GDI_ReleaseObj( hdc );
 288     return ret;
 289 }
 290
 291
 292 /***********************************************************************
 293  *           SetWindowExtEx    (GDI32.@)
 294  */
 295 BOOL WINAPI SetWindowExtEx( HDC hdc, INT x, INT y, LPSIZE size )
 296 {
 297     INT ret = TRUE;
 298     DC * dc = DC_GetDCPtr( hdc );
 299     if (!dc) return FALSE;
 300     if (dc->funcs->pSetWindowExt)
 301     {
 302         if((ret = dc->funcs->pSetWindowExt( dc->physDev, x, y )) != TRUE)
 303         {
 304             if(ret == GDI_NO_MORE_WORK)
 305                 ret = TRUE;
 306             goto done;
 307         }
 308     }
 309     if (size)
 310     {
 311         size->cx = dc->wndExtX;
 312         size->cy = dc->wndExtY;
 313     }
 314     if ((dc->MapMode != MM_ISOTROPIC) && (dc->MapMode != MM_ANISOTROPIC))
 315         goto done;
 316     if (!x || !y)
 317     {
 318         ret = FALSE;
 319         goto done;
 320     }
 321     dc->wndExtX = x;
 322     dc->wndExtY = y;
 323     if (dc->MapMode == MM_ISOTROPIC) MAPPING_FixIsotropic( dc );
 324     DC_UpdateXforms( dc );
 325  done:
 326     GDI_ReleaseObj( hdc );
 327     return ret;
 328 }
 329
 330
 331 /***********************************************************************
 332  *           SetWindowOrgEx    (GDI32.@)
 333  */
 334 BOOL WINAPI SetWindowOrgEx( HDC hdc, INT x, INT y, LPPOINT pt )
 335 {
 336     INT ret = TRUE;
 337     DC * dc = DC_GetDCPtr( hdc );
 338     if (!dc) return FALSE;
 339     if (dc->funcs->pSetWindowOrg)
 340     {
 341         if((ret = dc->funcs->pSetWindowOrg( dc->physDev, x, y )) != TRUE)
 342         {
 343             if(ret == GDI_NO_MORE_WORK)
 344                 ret = TRUE;
 345             goto done;
 346         }
 347     }
 348     if (pt)
 349     {
 350         pt->x = dc->wndOrgX;
 351         pt->y = dc->wndOrgY;
 352     }
 353     dc->wndOrgX = x;
 354     dc->wndOrgY = y;
 355     DC_UpdateXforms( dc );
 356  done:
 357     GDI_ReleaseObj( hdc );
 358     return ret;
 359 }
 360
 361
 362 /***********************************************************************
 363  *           OffsetViewportOrgEx    (GDI32.@)
 364  */
 365 BOOL WINAPI OffsetViewportOrgEx( HDC hdc, INT x, INT y, LPPOINT pt)
 366 {
 367     INT ret = TRUE;
 368     DC * dc = DC_GetDCPtr( hdc );
 369     if (!dc) return FALSE;
 370     if (dc->funcs->pOffsetViewportOrg)
 371     {
 372         if((ret = dc->funcs->pOffsetViewportOrg( dc->physDev, x, y )) != TRUE)
 373         {
 374             if(ret == GDI_NO_MORE_WORK)
 375                 ret = TRUE;
 376             goto done;
 377         }
 378     }
 379     if (pt)
 380     {
 381         pt->x = dc->vportOrgX;
 382         pt->y = dc->vportOrgY;
 383     }
 384     dc->vportOrgX += x;
 385     dc->vportOrgY += y;
 386     DC_UpdateXforms( dc );
 387  done:
 388     GDI_ReleaseObj( hdc );
 389     return ret;
 390 }
 391
 392
 393 /***********************************************************************
 394  *           OffsetWindowOrgEx    (GDI32.@)
 395  */
 396 BOOL WINAPI OffsetWindowOrgEx( HDC hdc, INT x, INT y, LPPOINT pt )
 397 {
 398     INT ret = TRUE;
 399     DC * dc = DC_GetDCPtr( hdc );
 400     if (!dc) return FALSE;
 401     if (dc->funcs->pOffsetWindowOrg)
 402     {
 403         if((ret = dc->funcs->pOffsetWindowOrg( dc->physDev, x, y )) != TRUE)
 404         {
 405             if(ret == GDI_NO_MORE_WORK)
 406                 ret = TRUE;
 407             goto done;
 408         }
 409     }
 410     if (pt)
 411     {
 412         pt->x = dc->wndOrgX;
 413         pt->y = dc->wndOrgY;
 414     }
 415     dc->wndOrgX += x;
 416     dc->wndOrgY += y;
 417     DC_UpdateXforms( dc );
 418  done:
 419     GDI_ReleaseObj( hdc );
 420     return ret;
 421 }
 422
 423
 424 /***********************************************************************
 425  *           ScaleViewportExtEx    (GDI32.@)
 426  */
 427 BOOL WINAPI ScaleViewportExtEx( HDC hdc, INT xNum, INT xDenom,
 428                                     INT yNum, INT yDenom, LPSIZE size )
 429 {
 430     INT ret = TRUE;
 431     DC * dc = DC_GetDCPtr( hdc );
 432     if (!dc) return FALSE;
 433     if (dc->funcs->pScaleViewportExt)
 434     {
 435         if((ret = dc->funcs->pScaleViewportExt( dc->physDev, xNum, xDenom, yNum, yDenom )) != TRUE)
 436         {
 437             if(ret == GDI_NO_MORE_WORK)
 438                 ret = TRUE;
 439             goto done;
 440         }
 441     }
 442     if (size)
 443     {
 444         size->cx = dc->vportExtX;
 445         size->cy = dc->vportExtY;
 446     }
 447     if ((dc->MapMode != MM_ISOTROPIC) && (dc->MapMode != MM_ANISOTROPIC))
 448         goto done;
 449     if (!xNum || !xDenom || !xNum || !yDenom)
 450     {
 451         ret = FALSE;
 452         goto done;
 453     }
 454     dc->vportExtX = (dc->vportExtX * xNum) / xDenom;
 455     dc->vportExtY = (dc->vportExtY * yNum) / yDenom;
 456     if (dc->vportExtX == 0) dc->vportExtX = 1;
 457     if (dc->vportExtY == 0) dc->vportExtY = 1;
 458     if (dc->MapMode == MM_ISOTROPIC) MAPPING_FixIsotropic( dc );
 459     DC_UpdateXforms( dc );
 460  done:
 461     GDI_ReleaseObj( hdc );
 462     return ret;
 463 }
 464
 465
 466 /***********************************************************************
 467  *           ScaleWindowExtEx    (GDI32.@)
 468  */
 469 BOOL WINAPI ScaleWindowExtEx( HDC hdc, INT xNum, INT xDenom,
 470                                   INT yNum, INT yDenom, LPSIZE size )
 471 {
 472     INT ret = TRUE;
 473     DC * dc = DC_GetDCPtr( hdc );
 474     if (!dc) return FALSE;
 475     if (dc->funcs->pScaleWindowExt)
 476     {
 477         if((ret = dc->funcs->pScaleWindowExt( dc->physDev, xNum, xDenom, yNum, yDenom )) != TRUE)
 478         {
 479             if(ret == GDI_NO_MORE_WORK)
 480                 ret = TRUE;
 481             goto done;
 482         }
 483     }
 484     if (size)
 485     {
 486         size->cx = dc->wndExtX;
 487         size->cy = dc->wndExtY;
 488     }
 489     if ((dc->MapMode != MM_ISOTROPIC) && (dc->MapMode != MM_ANISOTROPIC))
 490         goto done;
 491     if (!xNum || !xDenom || !xNum || !yDenom)
 492     {
 493         ret = FALSE;
 494         goto done;
 495     }
 496     dc->wndExtX = (dc->wndExtX * xNum) / xDenom;
 497     dc->wndExtY = (dc->wndExtY * yNum) / yDenom;
 498     if (dc->wndExtX == 0) dc->wndExtX = 1;
 499     if (dc->wndExtY == 0) dc->wndExtY = 1;
 500     if (dc->MapMode == MM_ISOTROPIC) MAPPING_FixIsotropic( dc );
 501     DC_UpdateXforms( dc );
 502  done:
 503     GDI_ReleaseObj( hdc );
 504     return ret;
 505 }