dlls/wineps.drv/graphics.c

   1 /*
   2  *      PostScript driver graphics functions
   3  *
   4  *      Copyright 1998  Huw D M Davies
   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 #include <stdio.h>
  23 #include <string.h>
  24 #include <math.h>
  25 #include <float.h>
  26 #include "windef.h"
  27 #include "winbase.h"
  28 #include "winuser.h"
  29 #include "psdrv.h"
  30 #include "wine/debug.h"
  31
  32 WINE_DEFAULT_DEBUG_CHANNEL(psdrv);
  33
  34 /***********************************************************************
  35  *           PSDRV_XWStoDS
  36  *
  37  * Performs a world-to-viewport transformation on the specified width.
  38  */
  39 INT PSDRV_XWStoDS( PHYSDEV dev, INT width )
  40 {
  41     POINT pt[2];
  42
  43     pt[0].x = 0;
  44     pt[0].y = 0;
  45     pt[1].x = width;
  46     pt[1].y = 0;
  47     LPtoDP( dev->hdc, pt, 2 );
  48     return pt[1].x - pt[0].x;
  49 }
  50
  51 /***********************************************************************
  52  *           PSDRV_DrawLine
  53  */
  54 static void PSDRV_DrawLine( PHYSDEV dev )
  55 {
  56     PSDRV_PDEVICE *physDev = get_psdrv_dev( dev );
  57
  58     if(physDev->pathdepth)
  59         return;
  60
  61     if (physDev->pen.style == PS_NULL)
  62         PSDRV_WriteNewPath(dev);
  63     else
  64         PSDRV_WriteStroke(dev);
  65 }
  66
  67 /***********************************************************************
  68  *           PSDRV_LineTo
  69  */
  70 BOOL CDECL PSDRV_LineTo(PHYSDEV dev, INT x, INT y)
  71 {
  72     POINT pt[2];
  73
  74     TRACE("%d %d\n", x, y);
  75
  76     GetCurrentPositionEx( dev->hdc, pt );
  77     pt[1].x = x;
  78     pt[1].y = y;
  79     LPtoDP( dev->hdc, pt, 2 );
  80
  81     PSDRV_SetPen(dev);
  82
  83     PSDRV_SetClip(dev);
  84     PSDRV_WriteMoveTo(dev, pt[0].x, pt[0].y );
  85     PSDRV_WriteLineTo(dev, pt[1].x, pt[1].y );
  86     PSDRV_DrawLine(dev);
  87     PSDRV_ResetClip(dev);
  88
  89     return TRUE;
  90 }
  91
  92
  93 /***********************************************************************
  94  *           PSDRV_Rectangle
  95  */
  96 BOOL CDECL PSDRV_Rectangle( PHYSDEV dev, INT left, INT top, INT right, INT bottom )
  97 {
  98     PSDRV_PDEVICE *physDev = get_psdrv_dev( dev );
  99     RECT rect;
 100
 101     TRACE("%d %d - %d %d\n", left, top, right, bottom);
 102
 103     SetRect(&rect, left, top, right, bottom);
 104     LPtoDP( dev->hdc, (POINT *)&rect, 2 );
 105
 106     /* Windows does something truly hacky here.  If we're in passthrough mode
 107        and our rop is R2_NOP, then we output the string below.  This is used in
 108        Office 2k when inserting eps files */
 109     if (physDev->job.passthrough_state == passthrough_active && GetROP2(dev->hdc) == R2_NOP)
 110     {
 111         char buf[256];
 112
 113         sprintf(buf, "N %ld %ld %ld %ld B\n", rect.right - rect.left, rect.bottom - rect.top, rect.left, rect.top);
 114         write_spool(dev, buf, strlen(buf));
 115         physDev->job.passthrough_state = passthrough_had_rect;
 116         return TRUE;
 117     }
 118
 119     PSDRV_SetPen(dev);
 120
 121     PSDRV_SetClip(dev);
 122     PSDRV_WriteRectangle(dev, rect.left, rect.top, rect.right - rect.left,
 123                          rect.bottom - rect.top );
 124     PSDRV_Brush(dev,0);
 125     PSDRV_DrawLine(dev);
 126     PSDRV_ResetClip(dev);
 127     return TRUE;
 128 }
 129
 130
 131 /***********************************************************************
 132  *           PSDRV_RoundRect
 133  */
 134 BOOL CDECL PSDRV_RoundRect( PHYSDEV dev, INT left, INT top, INT right,
 135                             INT bottom, INT ell_width, INT ell_height )
 136 {
 137     RECT rect[2];
 138
 139     SetRect(&rect[0], left, top, right, bottom);
 140     SetRect(&rect[1], 0, 0, ell_width, ell_height);
 141     LPtoDP( dev->hdc, (POINT *)rect, 4 );
 142
 143     left   = rect[0].left;
 144     top    = rect[0].top;
 145     right  = rect[0].right;
 146     bottom = rect[0].bottom;
 147     if (left > right) { INT tmp = left; left = right; right = tmp; }
 148     if (top > bottom) { INT tmp = top; top = bottom; bottom = tmp; }
 149
 150     ell_width  = rect[1].right - rect[1].left;
 151     ell_height = rect[1].bottom - rect[1].top;
 152     if (ell_width > right - left) ell_width = right - left;
 153     if (ell_height > bottom - top) ell_height = bottom - top;
 154
 155     PSDRV_WriteSpool(dev, "%RoundRect\n",11);
 156     PSDRV_SetPen(dev);
 157
 158     PSDRV_SetClip(dev);
 159     PSDRV_WriteMoveTo( dev, left, top + ell_height/2 );
 160     PSDRV_WriteArc( dev, left + ell_width/2, top + ell_height/2, ell_width,
 161                     ell_height, 90.0, 180.0);
 162     PSDRV_WriteLineTo( dev, right - ell_width/2, top );
 163     PSDRV_WriteArc( dev, right - ell_width/2, top + ell_height/2, ell_width,
 164                     ell_height, 0.0, 90.0);
 165     PSDRV_WriteLineTo( dev, right, bottom - ell_height/2 );
 166     PSDRV_WriteArc( dev, right - ell_width/2, bottom - ell_height/2, ell_width,
 167                     ell_height, -90.0, 0.0);
 168     PSDRV_WriteLineTo( dev, right - ell_width/2, bottom);
 169     PSDRV_WriteArc( dev, left + ell_width/2, bottom - ell_height/2, ell_width,
 170                     ell_height, 180.0, -90.0);
 171     PSDRV_WriteClosePath( dev );
 172
 173     PSDRV_Brush(dev,0);
 174     PSDRV_DrawLine(dev);
 175     PSDRV_ResetClip(dev);
 176     return TRUE;
 177 }
 178
 179 /***********************************************************************
 180  *           PSDRV_DrawArc
 181  *
 182  * Does the work of Arc, Chord and Pie. lines is 0, 1 or 2 respectively.
 183  */
 184 static BOOL PSDRV_DrawArc( PHYSDEV dev, INT left, INT top,
 185                            INT right, INT bottom, INT xstart, INT ystart,
 186                            INT xend, INT yend, int lines )
 187 {
 188     INT x, y, h, w;
 189     double start_angle, end_angle, ratio;
 190     RECT rect;
 191     POINT start, end;
 192
 193     SetRect(&rect, left, top, right, bottom);
 194     LPtoDP( dev->hdc, (POINT *)&rect, 2 );
 195     start.x = xstart;
 196     start.y = ystart;
 197     end.x = xend;
 198     end.y = yend;
 199     LPtoDP( dev->hdc, &start, 1 );
 200     LPtoDP( dev->hdc, &end, 1 );
 201
 202     x = (rect.left + rect.right) / 2;
 203     y = (rect.top + rect.bottom) / 2;
 204     w = rect.right - rect.left;
 205     h = rect.bottom - rect.top;
 206
 207     if(w < 0) w = -w;
 208     if(h < 0) h = -h;
 209     ratio = ((double)w)/h;
 210
 211     /* angle is the angle after the rectangle is transformed to a square and is
 212        measured anticlockwise from the +ve x-axis */
 213
 214     start_angle = atan2((double)(y - start.y) * ratio, (double)(start.x - x));
 215     end_angle = atan2((double)(y - end.y) * ratio, (double)(end.x - x));
 216
 217     start_angle *= 180.0 / M_PI;
 218     end_angle *= 180.0 / M_PI;
 219
 220     PSDRV_WriteSpool(dev,"%DrawArc\n", 9);
 221     PSDRV_SetPen(dev);
 222
 223     PSDRV_SetClip(dev);
 224     if(lines == 2) /* pie */
 225         PSDRV_WriteMoveTo(dev, x, y);
 226     else
 227         PSDRV_WriteNewPath( dev );
 228
 229     if(GetArcDirection(dev->hdc) == AD_COUNTERCLOCKWISE)
 230         PSDRV_WriteArc(dev, x, y, w, h, start_angle, end_angle);
 231     else
 232         PSDRV_WriteArc(dev, x, y, w, h, end_angle, start_angle);
 233     if(lines == 1 || lines == 2) { /* chord or pie */
 234         PSDRV_WriteClosePath(dev);
 235         PSDRV_Brush(dev,0);
 236     }
 237     PSDRV_DrawLine(dev);
 238     PSDRV_ResetClip(dev);
 239
 240     return TRUE;
 241 }
 242
 243
 244 /***********************************************************************
 245  *           PSDRV_Arc
 246  */
 247 BOOL CDECL PSDRV_Arc( PHYSDEV dev, INT left, INT top, INT right, INT bottom,
 248                       INT xstart, INT ystart, INT xend, INT yend )
 249 {
 250     return PSDRV_DrawArc( dev, left, top, right, bottom, xstart, ystart, xend, yend, 0 );
 251 }
 252
 253 /***********************************************************************
 254  *           PSDRV_Chord
 255  */
 256 BOOL CDECL PSDRV_Chord( PHYSDEV dev, INT left, INT top, INT right, INT bottom,
 257                         INT xstart, INT ystart, INT xend, INT yend )
 258 {
 259     return PSDRV_DrawArc( dev, left, top, right, bottom, xstart, ystart, xend, yend, 1 );
 260 }
 261
 262
 263 /***********************************************************************
 264  *           PSDRV_Pie
 265  */
 266 BOOL CDECL PSDRV_Pie( PHYSDEV dev, INT left, INT top, INT right, INT bottom,
 267                       INT xstart, INT ystart, INT xend, INT yend )
 268 {
 269     return PSDRV_DrawArc( dev, left, top, right, bottom, xstart, ystart, xend, yend, 2 );
 270 }
 271
 272
 273 /***********************************************************************
 274  *           PSDRV_Ellipse
 275  */
 276 BOOL CDECL PSDRV_Ellipse( PHYSDEV dev, INT left, INT top, INT right, INT bottom)
 277 {
 278     INT x, y, w, h;
 279     RECT rect;
 280
 281     TRACE("%d %d - %d %d\n", left, top, right, bottom);
 282
 283     SetRect(&rect, left, top, right, bottom);
 284     LPtoDP( dev->hdc, (POINT *)&rect, 2 );
 285
 286     x = (rect.left + rect.right) / 2;
 287     y = (rect.top + rect.bottom) / 2;
 288     w = rect.right - rect.left;
 289     h = rect.bottom - rect.top;
 290
 291     PSDRV_WriteSpool(dev, "%Ellipse\n", 9);
 292     PSDRV_SetPen(dev);
 293
 294     PSDRV_SetClip(dev);
 295     PSDRV_WriteNewPath(dev);
 296     PSDRV_WriteArc(dev, x, y, w, h, 0.0, 360.0);
 297     PSDRV_WriteClosePath(dev);
 298     PSDRV_Brush(dev,0);
 299     PSDRV_DrawLine(dev);
 300     PSDRV_ResetClip(dev);
 301     return TRUE;
 302 }
 303
 304
 305 /***********************************************************************
 306  *           PSDRV_PolyPolyline
 307  */
 308 BOOL CDECL PSDRV_PolyPolyline( PHYSDEV dev, const POINT* pts, const DWORD* counts, DWORD polylines )
 309 {
 310     DWORD polyline, line, total;
 311     POINT *dev_pts, *pt;
 312
 313     TRACE("\n");
 314
 315     for (polyline = total = 0; polyline < polylines; polyline++) total += counts[polyline];
 316     if (!(dev_pts = HeapAlloc( GetProcessHeap(), 0, total * sizeof(*dev_pts) ))) return FALSE;
 317     memcpy( dev_pts, pts, total * sizeof(*dev_pts) );
 318     LPtoDP( dev->hdc, dev_pts, total );
 319
 320     pt = dev_pts;
 321
 322     PSDRV_WriteSpool(dev, "%PolyPolyline\n",14);
 323     PSDRV_SetPen(dev);
 324     PSDRV_SetClip(dev);
 325
 326     for(polyline = 0; polyline < polylines; polyline++) {
 327         PSDRV_WriteMoveTo(dev, pt->x, pt->y);
 328         pt++;
 329         for(line = 1; line < counts[polyline]; line++, pt++)
 330             PSDRV_WriteLineTo(dev, pt->x, pt->y);
 331     }
 332     HeapFree( GetProcessHeap(), 0, dev_pts );
 333
 334     PSDRV_DrawLine(dev);
 335     PSDRV_ResetClip(dev);
 336     return TRUE;
 337 }
 338
 339
 340 /***********************************************************************
 341  *           PSDRV_PolyPolygon
 342  */
 343 BOOL CDECL PSDRV_PolyPolygon( PHYSDEV dev, const POINT* pts, const INT* counts, UINT polygons )
 344 {
 345     DWORD polygon, total;
 346     INT line;
 347     POINT *dev_pts, *pt;
 348
 349     TRACE("\n");
 350
 351     for (polygon = total = 0; polygon < polygons; polygon++) total += counts[polygon];
 352     if (!(dev_pts = HeapAlloc( GetProcessHeap(), 0, total * sizeof(*dev_pts) ))) return FALSE;
 353     memcpy( dev_pts, pts, total * sizeof(*dev_pts) );
 354     LPtoDP( dev->hdc, dev_pts, total );
 355
 356     pt = dev_pts;
 357
 358     PSDRV_WriteSpool(dev, "%PolyPolygon\n",13);
 359     PSDRV_SetPen(dev);
 360     PSDRV_SetClip(dev);
 361
 362     for(polygon = 0; polygon < polygons; polygon++) {
 363         PSDRV_WriteMoveTo(dev, pt->x, pt->y);
 364         pt++;
 365         for(line = 1; line < counts[polygon]; line++, pt++)
 366             PSDRV_WriteLineTo(dev, pt->x, pt->y);
 367         PSDRV_WriteClosePath(dev);
 368     }
 369     HeapFree( GetProcessHeap(), 0, dev_pts );
 370
 371     if(GetPolyFillMode( dev->hdc ) == ALTERNATE)
 372         PSDRV_Brush(dev, 1);
 373     else /* WINDING */
 374         PSDRV_Brush(dev, 0);
 375
 376     PSDRV_DrawLine(dev);
 377     PSDRV_ResetClip(dev);
 378     return TRUE;
 379 }
 380
 381 static BOOL poly_bezier( PHYSDEV dev, const POINT *pt0, const POINT *pts, DWORD count)
 382 {
 383     POINT dev_pts[3];
 384     DWORD i;
 385
 386     TRACE( "\n" );
 387
 388     dev_pts[0] = *pt0;
 389     LPtoDP( dev->hdc, dev_pts, 1 );
 390
 391     PSDRV_WriteSpool( dev, "%PolyBezier\n", 12 );
 392     PSDRV_SetPen( dev );
 393     PSDRV_SetClip( dev );
 394     PSDRV_WriteMoveTo( dev, dev_pts[0].x, dev_pts[0].y );
 395     for (i = 0; i < count; i += 3)
 396     {
 397         memcpy( dev_pts, pts, sizeof(dev_pts) );
 398         LPtoDP( dev->hdc, dev_pts, 3 );
 399         PSDRV_WriteCurveTo( dev, dev_pts );
 400     }
 401     PSDRV_DrawLine(dev);
 402     PSDRV_ResetClip(dev);
 403     return TRUE;
 404 }
 405
 406 /***********************************************************************
 407  *           PSDRV_PolyBezier
 408  */
 409 BOOL CDECL PSDRV_PolyBezier( PHYSDEV dev, const POINT *pts, DWORD count )
 410 {
 411     return poly_bezier( dev, pts, pts + 1, count - 1 );
 412 }
 413
 414
 415 /***********************************************************************
 416  *           PSDRV_PolyBezierTo
 417  */
 418 BOOL CDECL PSDRV_PolyBezierTo( PHYSDEV dev, const POINT *pts, DWORD count )
 419 {
 420     POINT pt0;
 421
 422     GetCurrentPositionEx( dev->hdc, &pt0 );
 423     return poly_bezier( dev, &pt0, pts, count );
 424 }
 425
 426
 427 /***********************************************************************
 428  *           PSDRV_SetPixel
 429  */
 430 COLORREF CDECL PSDRV_SetPixel( PHYSDEV dev, INT x, INT y, COLORREF color )
 431 {
 432     PSCOLOR pscolor;
 433     POINT pt;
 434
 435     pt.x = x;
 436     pt.y = y;
 437     LPtoDP( dev->hdc, &pt, 1 );
 438
 439     PSDRV_SetClip(dev);
 440     /* we bracket the setcolor in gsave/grestore so that we don't trash
 441        the current pen colour */
 442     PSDRV_WriteGSave(dev);
 443     PSDRV_WriteRectangle( dev, pt.x, pt.y, 1, 1 );
 444     PSDRV_CreateColor( dev, &pscolor, color );
 445     PSDRV_WriteSetColor( dev, &pscolor );
 446     PSDRV_WriteFill( dev );
 447     PSDRV_WriteGRestore(dev);
 448     PSDRV_ResetClip(dev);
 449     return color;
 450 }
 451
 452 /***********************************************************************
 453  *           PSDRV_PaintRgn
 454  */
 455 BOOL CDECL PSDRV_PaintRgn( PHYSDEV dev, HRGN hrgn )
 456 {
 457     RGNDATA *rgndata = NULL;
 458     RECT *pRect;
 459     DWORD size, i;
 460
 461     TRACE("hdc=%p\n", dev->hdc);
 462
 463     size = GetRegionData(hrgn, 0, NULL);
 464     rgndata = HeapAlloc( GetProcessHeap(), 0, size );
 465     if(!rgndata) {
 466         ERR("Can't allocate buffer\n");
 467         return FALSE;
 468     }
 469
 470     GetRegionData(hrgn, size, rgndata);
 471     if (rgndata->rdh.nCount == 0)
 472         goto end;
 473
 474     LPtoDP(dev->hdc, (POINT*)rgndata->Buffer, rgndata->rdh.nCount * 2);
 475
 476     PSDRV_SetClip(dev);
 477     for(i = 0, pRect = (RECT*)rgndata->Buffer; i < rgndata->rdh.nCount; i++, pRect++)
 478         PSDRV_WriteRectangle(dev, pRect->left, pRect->top, pRect->right - pRect->left, pRect->bottom - pRect->top);
 479
 480     PSDRV_Brush(dev, 0);
 481     PSDRV_WriteNewPath(dev);
 482     PSDRV_ResetClip(dev);
 483
 484  end:
 485     HeapFree(GetProcessHeap(), 0, rgndata);
 486     return TRUE;
 487 }
 488
 489 static BOOL paint_path( PHYSDEV dev, BOOL stroke, BOOL fill )
 490 {
 491     POINT *points;
 492     BYTE *types;
 493     int i, size = GetPath( dev->hdc, NULL, NULL, 0 );
 494
 495     if (size == -1) return FALSE;
 496     if (!size)
 497     {
 498         AbortPath( dev->hdc );
 499         return TRUE;
 500     }
 501     points = HeapAlloc( GetProcessHeap(), 0, size * sizeof(*points) );
 502     types = HeapAlloc( GetProcessHeap(), 0, size * sizeof(*types) );
 503     if (!points || !types) goto done;
 504     if (GetPath( dev->hdc, points, types, size ) == -1) goto done;
 505     LPtoDP( dev->hdc, points, size );
 506
 507     if (stroke) PSDRV_SetPen(dev);
 508     PSDRV_SetClip(dev);
 509     for (i = 0; i < size; i++)
 510     {
 511         switch (types[i])
 512         {
 513         case PT_MOVETO:
 514             PSDRV_WriteMoveTo( dev, points[i].x, points[i].y );
 515             break;
 516         case PT_LINETO:
 517         case PT_LINETO | PT_CLOSEFIGURE:
 518             PSDRV_WriteLineTo( dev, points[i].x, points[i].y );
 519             if (types[i] & PT_CLOSEFIGURE) PSDRV_WriteClosePath( dev );
 520             break;
 521         case PT_BEZIERTO:
 522         case PT_BEZIERTO | PT_CLOSEFIGURE:
 523             PSDRV_WriteCurveTo( dev, points + i );
 524             if (types[i] & PT_CLOSEFIGURE) PSDRV_WriteClosePath( dev );
 525             i += 2;
 526             break;
 527         }
 528     }
 529     if (fill) PSDRV_Brush( dev, GetPolyFillMode(dev->hdc) == ALTERNATE );
 530     if (stroke) PSDRV_DrawLine(dev);
 531     else PSDRV_WriteNewPath(dev);
 532     PSDRV_ResetClip(dev);
 533     AbortPath( dev->hdc );
 534
 535 done:
 536     HeapFree( GetProcessHeap(), 0, points );
 537     HeapFree( GetProcessHeap(), 0, types );
 538     return TRUE;
 539 }
 540
 541 /***********************************************************************
 542  *           PSDRV_FillPath
 543  */
 544 BOOL CDECL PSDRV_FillPath( PHYSDEV dev )
 545 {
 546     return paint_path( dev, FALSE, TRUE );
 547 }
 548
 549 /***********************************************************************
 550  *           PSDRV_StrokeAndFillPath
 551  */
 552 BOOL CDECL PSDRV_StrokeAndFillPath( PHYSDEV dev )
 553 {
 554     return paint_path( dev, TRUE, TRUE );
 555 }
 556
 557 /***********************************************************************
 558  *           PSDRV_StrokePath
 559  */
 560 BOOL CDECL PSDRV_StrokePath( PHYSDEV dev )
 561 {
 562     return paint_path( dev, TRUE, FALSE );
 563 }