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