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 "config.h"
  22
  23 #include <stdio.h>
  24 #include <string.h>
  25 #include <math.h>
  26 #if defined(HAVE_FLOAT_H)
  27 # include <float.h>
  28 #endif
  29 #if !defined(PI)
  30 # define PI M_PI
  31 #endif
  32 #include "psdrv.h"
  33 #include "wine/debug.h"
  34
  35 WINE_DEFAULT_DEBUG_CHANNEL(psdrv);
  36
  37 /***********************************************************************
  38  *           PSDRV_XWStoDS
  39  *
  40  * Performs a world-to-viewport transformation on the specified width.
  41  */
  42 INT PSDRV_XWStoDS( PSDRV_PDEVICE *physDev, INT width )
  43 {
  44     POINT pt[2];
  45
  46     pt[0].x = 0;
  47     pt[0].y = 0;
  48     pt[1].x = width;
  49     pt[1].y = 0;
  50     LPtoDP( physDev->hdc, pt, 2 );
  51     return pt[1].x - pt[0].x;
  52 }
  53
  54 /***********************************************************************
  55  *           PSDRV_YWStoDS
  56  *
  57  * Performs a world-to-viewport transformation on the specified height.
  58  */
  59 INT PSDRV_YWStoDS( PSDRV_PDEVICE *physDev, INT height )
  60 {
  61     POINT pt[2];
  62
  63     pt[0].x = 0;
  64     pt[0].y = 0;
  65     pt[1].x = 0;
  66     pt[1].y = height;
  67     LPtoDP( physDev->hdc, pt, 2 );
  68     return pt[1].y - pt[0].y;
  69 }
  70
  71 /***********************************************************************
  72  *           PSDRV_DrawLine
  73  */
  74 static void PSDRV_DrawLine( PSDRV_PDEVICE *physDev )
  75 {
  76     if(physDev->pathdepth)
  77         return;
  78
  79     if (physDev->pen.style == PS_NULL)
  80         PSDRV_WriteNewPath(physDev);
  81     else
  82         PSDRV_WriteStroke(physDev);
  83 }
  84
  85 /***********************************************************************
  86  *           PSDRV_LineTo
  87  */
  88 BOOL PSDRV_LineTo(PSDRV_PDEVICE *physDev, INT x, INT y)
  89 {
  90     POINT pt[2];
  91
  92     TRACE("%d %d\n", x, y);
  93
  94     GetCurrentPositionEx( physDev->hdc, pt );
  95     pt[1].x = x;
  96     pt[1].y = y;
  97     LPtoDP( physDev->hdc, pt, 2 );
  98
  99     PSDRV_SetPen(physDev);
 100
 101     PSDRV_SetClip(physDev);
 102     PSDRV_WriteMoveTo(physDev, pt[0].x, pt[0].y );
 103     PSDRV_WriteLineTo(physDev, pt[1].x, pt[1].y );
 104     PSDRV_DrawLine(physDev);
 105     PSDRV_ResetClip(physDev);
 106
 107     return TRUE;
 108 }
 109
 110
 111 /***********************************************************************
 112  *           PSDRV_Rectangle
 113  */
 114 BOOL PSDRV_Rectangle( PSDRV_PDEVICE *physDev, INT left, INT top, INT right, INT bottom )
 115 {
 116     RECT rect;
 117
 118     TRACE("%d %d - %d %d\n", left, top, right, bottom);
 119
 120     rect.left = left;
 121     rect.top = top;
 122     rect.right = right;
 123     rect.bottom = bottom;
 124     LPtoDP( physDev->hdc, (POINT *)&rect, 2 );
 125
 126     /* Windows does something truly hacky here.  If we're in passthrough mode
 127        and our rop is R2_NOP, then we output the string below.  This is used in
 128        Office 2k when inserting eps files */
 129     if(physDev->job.in_passthrough && !physDev->job.had_passthrough_rect && GetROP2(physDev->hdc) == R2_NOP) {
 130       char buf[256];
 131       sprintf(buf, "N %d %d %d %d B\n", rect.right - rect.left, rect.bottom - rect.top, rect.left, rect.top);
 132       WriteSpool16(physDev->job.hJob, buf, strlen(buf));
 133       physDev->job.had_passthrough_rect = TRUE;
 134       return TRUE;
 135     }
 136
 137     PSDRV_SetPen(physDev);
 138
 139     PSDRV_SetClip(physDev);
 140     PSDRV_WriteRectangle(physDev, rect.left, rect.top, rect.right - rect.left,
 141                          rect.bottom - rect.top );
 142     PSDRV_Brush(physDev,0);
 143     PSDRV_DrawLine(physDev);
 144     PSDRV_ResetClip(physDev);
 145     return TRUE;
 146 }
 147
 148
 149 /***********************************************************************
 150  *           PSDRV_RoundRect
 151  */
 152 BOOL PSDRV_RoundRect( PSDRV_PDEVICE *physDev, INT left, INT top, INT right,
 153                       INT bottom, INT ell_width, INT ell_height )
 154 {
 155     RECT rect[2];
 156
 157     rect[0].left   = left;
 158     rect[0].top    = top;
 159     rect[0].right  = right;
 160     rect[0].bottom = bottom;
 161     rect[1].left   = 0;
 162     rect[1].top    = 0;
 163     rect[1].right  = ell_width;
 164     rect[1].bottom = ell_height;
 165     LPtoDP( physDev->hdc, (POINT *)rect, 4 );
 166
 167     left   = rect[0].left;
 168     top    = rect[0].top;
 169     right  = rect[0].right;
 170     bottom = rect[0].bottom;
 171     if (left > right) { INT tmp = left; left = right; right = tmp; }
 172     if (top > bottom) { INT tmp = top; top = bottom; bottom = tmp; }
 173
 174     ell_width  = rect[1].right - rect[1].left;
 175     ell_height = rect[1].bottom - rect[1].top;
 176     if (ell_width > right - left) ell_width = right - left;
 177     if (ell_height > bottom - top) ell_height = bottom - top;
 178
 179     PSDRV_WriteSpool(physDev, "%RoundRect\n",11);
 180     PSDRV_SetPen(physDev);
 181
 182     PSDRV_SetClip(physDev);
 183     PSDRV_WriteMoveTo( physDev, left, top + ell_height/2 );
 184     PSDRV_WriteArc( physDev, left + ell_width/2, top + ell_height/2, ell_width,
 185                     ell_height, 90.0, 180.0);
 186     PSDRV_WriteLineTo( physDev, right - ell_width/2, top );
 187     PSDRV_WriteArc( physDev, right - ell_width/2, top + ell_height/2, ell_width,
 188                     ell_height, 0.0, 90.0);
 189     PSDRV_WriteLineTo( physDev, right, bottom - ell_height/2 );
 190     PSDRV_WriteArc( physDev, right - ell_width/2, bottom - ell_height/2, ell_width,
 191                     ell_height, -90.0, 0.0);
 192     PSDRV_WriteLineTo( physDev, right - ell_width/2, bottom);
 193     PSDRV_WriteArc( physDev, left + ell_width/2, bottom - ell_height/2, ell_width,
 194                     ell_height, 180.0, -90.0);
 195     PSDRV_WriteClosePath( physDev );
 196
 197     PSDRV_Brush(physDev,0);
 198     PSDRV_DrawLine(physDev);
 199     PSDRV_ResetClip(physDev);
 200     return TRUE;
 201 }
 202
 203 /***********************************************************************
 204  *           PSDRV_DrawArc
 205  *
 206  * Does the work of Arc, Chord and Pie. lines is 0, 1 or 2 respectively.
 207  */
 208 static BOOL PSDRV_DrawArc( PSDRV_PDEVICE *physDev, INT left, INT top,
 209                            INT right, INT bottom, INT xstart, INT ystart,
 210                            INT xend, INT yend, int lines )
 211 {
 212     INT x, y, h, w;
 213     double start_angle, end_angle, ratio;
 214     RECT rect;
 215     POINT start, end;
 216
 217     rect.left = left;
 218     rect.top = top;
 219     rect.right = right;
 220     rect.bottom = bottom;
 221     LPtoDP( physDev->hdc, (POINT *)&rect, 2 );
 222     start.x = xstart;
 223     start.y = ystart;
 224     end.x = xend;
 225     end.y = yend;
 226     LPtoDP( physDev->hdc, &start, 1 );
 227     LPtoDP( physDev->hdc, &end, 1 );
 228
 229     x = (rect.left + rect.right) / 2;
 230     y = (rect.top + rect.bottom) / 2;
 231     w = rect.right - rect.left;
 232     h = rect.bottom - rect.top;
 233
 234     if(w < 0) w = -w;
 235     if(h < 0) h = -h;
 236     ratio = ((double)w)/h;
 237
 238     /* angle is the angle after the rectangle is transformed to a square and is
 239        measured anticlockwise from the +ve x-axis */
 240
 241     start_angle = atan2((double)(y - start.y) * ratio, (double)(start.x - x));
 242     end_angle = atan2((double)(y - end.y) * ratio, (double)(end.x - x));
 243
 244     start_angle *= 180.0 / PI;
 245     end_angle *= 180.0 / PI;
 246
 247     PSDRV_WriteSpool(physDev,"%DrawArc\n", 9);
 248     PSDRV_SetPen(physDev);
 249
 250     PSDRV_SetClip(physDev);
 251     if(lines == 2) /* pie */
 252         PSDRV_WriteMoveTo(physDev, x, y);
 253     else
 254         PSDRV_WriteNewPath( physDev );
 255
 256     PSDRV_WriteArc(physDev, x, y, w, h, start_angle, end_angle);
 257     if(lines == 1 || lines == 2) { /* chord or pie */
 258         PSDRV_WriteClosePath(physDev);
 259         PSDRV_Brush(physDev,0);
 260     }
 261     PSDRV_DrawLine(physDev);
 262     PSDRV_ResetClip(physDev);
 263
 264     return TRUE;
 265 }
 266
 267
 268 /***********************************************************************
 269  *           PSDRV_Arc
 270  */
 271 BOOL PSDRV_Arc( PSDRV_PDEVICE *physDev, INT left, INT top, INT right, INT bottom,
 272                 INT xstart, INT ystart, INT xend, INT yend )
 273 {
 274     return PSDRV_DrawArc( physDev, left, top, right, bottom, xstart, ystart, xend, yend, 0 );
 275 }
 276
 277 /***********************************************************************
 278  *           PSDRV_Chord
 279  */
 280 BOOL PSDRV_Chord( PSDRV_PDEVICE *physDev, INT left, INT top, INT right, INT bottom,
 281                   INT xstart, INT ystart, INT xend, INT yend )
 282 {
 283     return PSDRV_DrawArc( physDev, left, top, right, bottom, xstart, ystart, xend, yend, 1 );
 284 }
 285
 286
 287 /***********************************************************************
 288  *           PSDRV_Pie
 289  */
 290 BOOL PSDRV_Pie( PSDRV_PDEVICE *physDev, INT left, INT top, INT right, INT bottom,
 291                 INT xstart, INT ystart, INT xend, INT yend )
 292 {
 293     return PSDRV_DrawArc( physDev, left, top, right, bottom, xstart, ystart, xend, yend, 2 );
 294 }
 295
 296
 297 /***********************************************************************
 298  *           PSDRV_Ellipse
 299  */
 300 BOOL PSDRV_Ellipse( PSDRV_PDEVICE *physDev, INT left, INT top, INT right, INT bottom)
 301 {
 302     INT x, y, w, h;
 303     RECT rect;
 304
 305     TRACE("%d %d - %d %d\n", left, top, right, bottom);
 306
 307     rect.left   = left;
 308     rect.top    = top;
 309     rect.right  = right;
 310     rect.bottom = bottom;
 311     LPtoDP( physDev->hdc, (POINT *)&rect, 2 );
 312
 313     x = (rect.left + rect.right) / 2;
 314     y = (rect.top + rect.bottom) / 2;
 315     w = rect.right - rect.left;
 316     h = rect.bottom - rect.top;
 317
 318     PSDRV_WriteSpool(physDev, "%Ellipse\n", 9);
 319     PSDRV_SetPen(physDev);
 320
 321     PSDRV_SetClip(physDev);
 322     PSDRV_WriteNewPath(physDev);
 323     PSDRV_WriteArc(physDev, x, y, w, h, 0.0, 360.0);
 324     PSDRV_WriteClosePath(physDev);
 325     PSDRV_Brush(physDev,0);
 326     PSDRV_DrawLine(physDev);
 327     PSDRV_ResetClip(physDev);
 328     return TRUE;
 329 }
 330
 331
 332 /***********************************************************************
 333  *           PSDRV_PolyPolyline
 334  */
 335 BOOL PSDRV_PolyPolyline( PSDRV_PDEVICE *physDev, const POINT* pts, const DWORD* counts,
 336                          DWORD polylines )
 337 {
 338     DWORD polyline, line, total;
 339     POINT *dev_pts, *pt;
 340
 341     TRACE("\n");
 342
 343     for (polyline = total = 0; polyline < polylines; polyline++) total += counts[polyline];
 344     if (!(dev_pts = HeapAlloc( GetProcessHeap(), 0, total * sizeof(*dev_pts) ))) return FALSE;
 345     memcpy( dev_pts, pts, total * sizeof(*dev_pts) );
 346     LPtoDP( physDev->hdc, dev_pts, total );
 347
 348     pt = dev_pts;
 349
 350     PSDRV_WriteSpool(physDev, "%PolyPolyline\n",14);
 351     PSDRV_SetPen(physDev);
 352     PSDRV_SetClip(physDev);
 353
 354     for(polyline = 0; polyline < polylines; polyline++) {
 355         PSDRV_WriteMoveTo(physDev, pt->x, pt->y);
 356         pt++;
 357         for(line = 1; line < counts[polyline]; line++, pt++)
 358             PSDRV_WriteLineTo(physDev, pt->x, pt->y);
 359     }
 360     HeapFree( GetProcessHeap(), 0, dev_pts );
 361
 362     PSDRV_DrawLine(physDev);
 363     PSDRV_ResetClip(physDev);
 364     return TRUE;
 365 }
 366
 367
 368 /***********************************************************************
 369  *           PSDRV_Polyline
 370  */
 371 BOOL PSDRV_Polyline( PSDRV_PDEVICE *physDev, const POINT* pt, INT count )
 372 {
 373     return PSDRV_PolyPolyline( physDev, pt, (LPDWORD) &count, 1 );
 374 }
 375
 376
 377 /***********************************************************************
 378  *           PSDRV_PolyPolygon
 379  */
 380 BOOL PSDRV_PolyPolygon( PSDRV_PDEVICE *physDev, const POINT* pts, const INT* counts,
 381                         UINT polygons )
 382 {
 383     DWORD polygon, total;
 384     INT line;
 385     POINT *dev_pts, *pt;
 386
 387     TRACE("\n");
 388
 389     for (polygon = total = 0; polygon < polygons; polygon++) total += counts[polygon];
 390     if (!(dev_pts = HeapAlloc( GetProcessHeap(), 0, total * sizeof(*dev_pts) ))) return FALSE;
 391     memcpy( dev_pts, pts, total * sizeof(*dev_pts) );
 392     LPtoDP( physDev->hdc, dev_pts, total );
 393
 394     pt = dev_pts;
 395
 396     PSDRV_WriteSpool(physDev, "%PolyPolygon\n",13);
 397     PSDRV_SetPen(physDev);
 398     PSDRV_SetClip(physDev);
 399
 400     for(polygon = 0; polygon < polygons; polygon++) {
 401         PSDRV_WriteMoveTo(physDev, pt->x, pt->y);
 402         pt++;
 403         for(line = 1; line < counts[polygon]; line++, pt++)
 404             PSDRV_WriteLineTo(physDev, pt->x, pt->y);
 405         PSDRV_WriteClosePath(physDev);
 406     }
 407     HeapFree( GetProcessHeap(), 0, dev_pts );
 408
 409     if(GetPolyFillMode( physDev->hdc ) == ALTERNATE)
 410         PSDRV_Brush(physDev, 1);
 411     else /* WINDING */
 412         PSDRV_Brush(physDev, 0);
 413
 414     PSDRV_DrawLine(physDev);
 415     PSDRV_ResetClip(physDev);
 416     return TRUE;
 417 }
 418
 419
 420 /***********************************************************************
 421  *           PSDRV_Polygon
 422  */
 423 BOOL PSDRV_Polygon( PSDRV_PDEVICE *physDev, const POINT* pt, INT count )
 424 {
 425      return PSDRV_PolyPolygon( physDev, pt, &count, 1 );
 426 }
 427
 428
 429 /***********************************************************************
 430  *           PSDRV_SetPixel
 431  */
 432 COLORREF PSDRV_SetPixel( PSDRV_PDEVICE *physDev, INT x, INT y, COLORREF color )
 433 {
 434     PSCOLOR pscolor;
 435     POINT pt;
 436
 437     pt.x = x;
 438     pt.y = y;
 439     LPtoDP( physDev->hdc, &pt, 1 );
 440
 441     PSDRV_SetClip(physDev);
 442     /* we bracket the setcolor in gsave/grestore so that we don't trash
 443        the current pen colour */
 444     PSDRV_WriteGSave(physDev);
 445     PSDRV_WriteRectangle( physDev, pt.x, pt.y, 0, 0 );
 446     PSDRV_CreateColor( physDev, &pscolor, color );
 447     PSDRV_WriteSetColor( physDev, &pscolor );
 448     PSDRV_WriteFill( physDev );
 449     PSDRV_WriteGRestore(physDev);
 450     PSDRV_ResetClip(physDev);
 451     return color;
 452 }
 453
 454 /***********************************************************************
 455  *           PSDRV_PaintRgn
 456  */
 457 BOOL PSDRV_PaintRgn( PSDRV_PDEVICE *physDev, HRGN hrgn )
 458 {
 459
 460     RGNDATA *rgndata = NULL;
 461     RECT *pRect;
 462     DWORD size, i;
 463
 464     TRACE("hdc=%p\n", physDev->hdc);
 465
 466     size = GetRegionData(hrgn, 0, NULL);
 467     rgndata = HeapAlloc( GetProcessHeap(), 0, size );
 468     if(!rgndata) {
 469         ERR("Can't allocate buffer\n");
 470         return FALSE;
 471     }
 472
 473     GetRegionData(hrgn, size, rgndata);
 474     if (rgndata->rdh.nCount == 0)
 475         goto end;
 476
 477     LPtoDP(physDev->hdc, (POINT*)rgndata->Buffer, rgndata->rdh.nCount * 2);
 478
 479     PSDRV_SetClip(physDev);
 480     PSDRV_WriteNewPath(physDev);
 481     for(i = 0, pRect = (RECT*)rgndata->Buffer; i < rgndata->rdh.nCount; i++, pRect++)
 482         PSDRV_WriteRectangle(physDev, pRect->left, pRect->top, pRect->right - pRect->left, pRect->bottom - pRect->top);
 483
 484     PSDRV_Brush(physDev, 0);
 485     PSDRV_ResetClip(physDev);
 486
 487  end:
 488     HeapFree(GetProcessHeap(), 0, rgndata);
 489     return TRUE;
 490 }