dlls/gdiplus/graphics.c

   1 /*
   2  * Copyright (C) 2007 Google (Evan Stade)
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  17  */
  18
  19 #include <stdarg.h>
  20 #include <math.h>
  21
  22 #include "windef.h"
  23 #include "winbase.h"
  24 #include "winuser.h"
  25 #include "wingdi.h"
  26 #include "gdiplus.h"
  27 #include "gdiplus_private.h"
  28 #include "wine/debug.h"
  29
  30 WINE_DEFAULT_DEBUG_CHANNEL(gdiplus);
  31
  32 /* looks-right constants */
  33 #define TENSION_CONST (0.3)
  34 #define ANCHOR_WIDTH (2.0)
  35 #define MAX_ITERS (50)
  36
  37 /* Converts angle (in degrees) to x/y coordinates */
  38 static void deg2xy(REAL angle, REAL x_0, REAL y_0, REAL *x, REAL *y)
  39 {
  40     REAL radAngle, hypotenuse;
  41
  42     radAngle = deg2rad(angle);
  43     hypotenuse = 50.0; /* arbitrary */
  44
  45     *x = x_0 + cos(radAngle) * hypotenuse;
  46     *y = y_0 + sin(radAngle) * hypotenuse;
  47 }
  48
  49 /* Converts from gdiplus path point type to gdi path point type. */
  50 static BYTE convert_path_point_type(BYTE type)
  51 {
  52     BYTE ret;
  53
  54     switch(type & PathPointTypePathTypeMask){
  55         case PathPointTypeBezier:
  56             ret = PT_BEZIERTO;
  57             break;
  58         case PathPointTypeLine:
  59             ret = PT_LINETO;
  60             break;
  61         case PathPointTypeStart:
  62             ret = PT_MOVETO;
  63             break;
  64         default:
  65             ERR("Bad point type\n");
  66             return 0;
  67     }
  68
  69     if(type & PathPointTypeCloseSubpath)
  70         ret |= PT_CLOSEFIGURE;
  71
  72     return ret;
  73 }
  74
  75 static REAL convert_unit(HDC hdc, GpUnit unit)
  76 {
  77     switch(unit)
  78     {
  79         case UnitInch:
  80             return (REAL) GetDeviceCaps(hdc, LOGPIXELSX);
  81         case UnitPoint:
  82             return ((REAL)GetDeviceCaps(hdc, LOGPIXELSX)) / 72.0;
  83         case UnitDocument:
  84             return ((REAL)GetDeviceCaps(hdc, LOGPIXELSX)) / 300.0;
  85         case UnitMillimeter:
  86             return ((REAL)GetDeviceCaps(hdc, LOGPIXELSX)) / 25.4;
  87         case UnitWorld:
  88             ERR("cannot convert UnitWorld\n");
  89             return 0.0;
  90         case UnitPixel:
  91         case UnitDisplay:
  92         default:
  93             return 1.0;
  94     }
  95 }
  96
  97 static INT prepare_dc(GpGraphics *graphics, GpPen *pen)
  98 {
  99     HPEN gdipen;
 100     REAL width;
 101     INT save_state = SaveDC(graphics->hdc);
 102     GpPointF pt[2];
 103
 104     EndPath(graphics->hdc);
 105
 106     /* Get an estimate for the amount the pen width is affected by the world
 107      * transform. (This is similar to what some of the wine drivers do.) */
 108     pt[0].X = 0.0;
 109     pt[0].Y = 0.0;
 110     pt[1].X = 1.0;
 111     pt[1].Y = 1.0;
 112     GdipTransformMatrixPoints(graphics->worldtrans, pt, 2);
 113     width = sqrt((pt[1].X - pt[0].X) * (pt[1].X - pt[0].X) +
 114                  (pt[1].Y - pt[0].Y) * (pt[1].Y - pt[0].Y)) / sqrt(2.0);
 115
 116     width *= pen->width * convert_unit(graphics->hdc,
 117                           pen->unit == UnitWorld ? graphics->unit : pen->unit);
 118
 119     gdipen = ExtCreatePen(pen->style, roundr(width), &pen->brush->lb, 0, NULL);
 120     SelectObject(graphics->hdc, gdipen);
 121
 122     return save_state;
 123 }
 124
 125 static void restore_dc(GpGraphics *graphics, INT state)
 126 {
 127     DeleteObject(SelectObject(graphics->hdc, GetStockObject(NULL_PEN)));
 128     RestoreDC(graphics->hdc, state);
 129 }
 130
 131 /* This helper applies all the changes that the points listed in ptf need in
 132  * order to be drawn on the device context.  In the end, this should include at
 133  * least:
 134  *  -scaling by page unit
 135  *  -applying world transformation
 136  *  -converting from float to int
 137  * Native gdiplus uses gdi32 to do all this (via SetMapMode, SetViewportExtEx,
 138  * SetWindowExtEx, SetWorldTransform, etc.) but we cannot because we are using
 139  * gdi to draw, and these functions would irreparably mess with line widths.
 140  */
 141 static void transform_and_round_points(GpGraphics *graphics, POINT *pti,
 142     GpPointF *ptf, INT count)
 143 {
 144     REAL unitscale;
 145     GpMatrix *matrix;
 146     int i;
 147
 148     unitscale = convert_unit(graphics->hdc, graphics->unit);
 149
 150     /* apply page scale */
 151     if(graphics->unit != UnitDisplay)
 152         unitscale *= graphics->scale;
 153
 154     GdipCloneMatrix(graphics->worldtrans, &matrix);
 155     GdipScaleMatrix(matrix, unitscale, unitscale, MatrixOrderAppend);
 156     GdipTransformMatrixPoints(matrix, ptf, count);
 157     GdipDeleteMatrix(matrix);
 158
 159     for(i = 0; i < count; i++){
 160         pti[i].x = roundr(ptf[i].X);
 161         pti[i].y = roundr(ptf[i].Y);
 162     }
 163 }
 164
 165 /* GdipDrawPie/GdipFillPie helper function */
 166 static void draw_pie(GpGraphics *graphics, REAL x, REAL y, REAL width,
 167     REAL height, REAL startAngle, REAL sweepAngle)
 168 {
 169     GpPointF ptf[4];
 170     POINT pti[4];
 171
 172     ptf[0].X = x;
 173     ptf[0].Y = y;
 174     ptf[1].X = x + width;
 175     ptf[1].Y = y + height;
 176
 177     deg2xy(startAngle+sweepAngle, x + width / 2.0, y + width / 2.0, &ptf[2].X, &ptf[2].Y);
 178     deg2xy(startAngle, x + width / 2.0, y + width / 2.0, &ptf[3].X, &ptf[3].Y);
 179
 180     transform_and_round_points(graphics, pti, ptf, 4);
 181
 182     Pie(graphics->hdc, pti[0].x, pti[0].y, pti[1].x, pti[1].y, pti[2].x,
 183         pti[2].y, pti[3].x, pti[3].y);
 184 }
 185
 186 /* GdipDrawCurve helper function.
 187  * Calculates Bezier points from cardinal spline points. */
 188 static void calc_curve_bezier(CONST GpPointF *pts, REAL tension, REAL *x1,
 189     REAL *y1, REAL *x2, REAL *y2)
 190 {
 191     REAL xdiff, ydiff;
 192
 193     /* calculate tangent */
 194     xdiff = pts[2].X - pts[0].X;
 195     ydiff = pts[2].Y - pts[0].Y;
 196
 197     /* apply tangent to get control points */
 198     *x1 = pts[1].X - tension * xdiff;
 199     *y1 = pts[1].Y - tension * ydiff;
 200     *x2 = pts[1].X + tension * xdiff;
 201     *y2 = pts[1].Y + tension * ydiff;
 202 }
 203
 204 /* GdipDrawCurve helper function.
 205  * Calculates Bezier points from cardinal spline endpoints. */
 206 static void calc_curve_bezier_endp(REAL xend, REAL yend, REAL xadj, REAL yadj,
 207     REAL tension, REAL *x, REAL *y)
 208 {
 209     /* tangent at endpoints is the line from the endpoint to the adjacent point */
 210     *x = roundr(tension * (xadj - xend) + xend);
 211     *y = roundr(tension * (yadj - yend) + yend);
 212 }
 213
 214 /* Draws the linecap the specified color and size on the hdc.  The linecap is in
 215  * direction of the line from x1, y1 to x2, y2 and is anchored on x2, y2. Probably
 216  * should not be called on an hdc that has a path you care about. */
 217 static void draw_cap(GpGraphics *graphics, COLORREF color, GpLineCap cap, REAL size,
 218     const GpCustomLineCap *custom, REAL x1, REAL y1, REAL x2, REAL y2)
 219 {
 220     HGDIOBJ oldbrush = NULL, oldpen = NULL;
 221     GpMatrix *matrix = NULL;
 222     HBRUSH brush = NULL;
 223     HPEN pen = NULL;
 224     PointF ptf[4], *custptf = NULL;
 225     POINT pt[4], *custpt = NULL;
 226     BYTE *tp = NULL;
 227     REAL theta, dsmall, dbig, dx, dy = 0.0;
 228     INT i, count;
 229     LOGBRUSH lb;
 230     BOOL customstroke;
 231
 232     if((x1 == x2) && (y1 == y2))
 233         return;
 234
 235     theta = gdiplus_atan2(y2 - y1, x2 - x1);
 236
 237     customstroke = (cap == LineCapCustom) && custom && (!custom->fill);
 238     if(!customstroke){
 239         brush = CreateSolidBrush(color);
 240         lb.lbStyle = BS_SOLID;
 241         lb.lbColor = color;
 242         lb.lbHatch = 0;
 243         pen = ExtCreatePen(PS_GEOMETRIC | PS_SOLID | PS_ENDCAP_FLAT |
 244                            PS_JOIN_MITER, 1, &lb, 0,
 245                            NULL);
 246         oldbrush = SelectObject(graphics->hdc, brush);
 247         oldpen = SelectObject(graphics->hdc, pen);
 248     }
 249
 250     switch(cap){
 251         case LineCapFlat:
 252             break;
 253         case LineCapSquare:
 254         case LineCapSquareAnchor:
 255         case LineCapDiamondAnchor:
 256             size = size * (cap & LineCapNoAnchor ? ANCHOR_WIDTH : 1.0) / 2.0;
 257             if(cap == LineCapDiamondAnchor){
 258                 dsmall = cos(theta + M_PI_2) * size;
 259                 dbig = sin(theta + M_PI_2) * size;
 260             }
 261             else{
 262                 dsmall = cos(theta + M_PI_4) * size;
 263                 dbig = sin(theta + M_PI_4) * size;
 264             }
 265
 266             ptf[0].X = x2 - dsmall;
 267             ptf[1].X = x2 + dbig;
 268
 269             ptf[0].Y = y2 - dbig;
 270             ptf[3].Y = y2 + dsmall;
 271
 272             ptf[1].Y = y2 - dsmall;
 273             ptf[2].Y = y2 + dbig;
 274
 275             ptf[3].X = x2 - dbig;
 276             ptf[2].X = x2 + dsmall;
 277
 278             transform_and_round_points(graphics, pt, ptf, 4);
 279             Polygon(graphics->hdc, pt, 4);
 280
 281             break;
 282         case LineCapArrowAnchor:
 283             size = size * 4.0 / sqrt(3.0);
 284
 285             dx = cos(M_PI / 6.0 + theta) * size;
 286             dy = sin(M_PI / 6.0 + theta) * size;
 287
 288             ptf[0].X = x2 - dx;
 289             ptf[0].Y = y2 - dy;
 290
 291             dx = cos(- M_PI / 6.0 + theta) * size;
 292             dy = sin(- M_PI / 6.0 + theta) * size;
 293
 294             ptf[1].X = x2 - dx;
 295             ptf[1].Y = y2 - dy;
 296
 297             ptf[2].X = x2;
 298             ptf[2].Y = y2;
 299
 300             transform_and_round_points(graphics, pt, ptf, 3);
 301             Polygon(graphics->hdc, pt, 3);
 302
 303             break;
 304         case LineCapRoundAnchor:
 305             dx = dy = ANCHOR_WIDTH * size / 2.0;
 306
 307             ptf[0].X = x2 - dx;
 308             ptf[0].Y = y2 - dy;
 309             ptf[1].X = x2 + dx;
 310             ptf[1].Y = y2 + dy;
 311
 312             transform_and_round_points(graphics, pt, ptf, 2);
 313             Ellipse(graphics->hdc, pt[0].x, pt[0].y, pt[1].x, pt[1].y);
 314
 315             break;
 316         case LineCapTriangle:
 317             size = size / 2.0;
 318             dx = cos(M_PI_2 + theta) * size;
 319             dy = sin(M_PI_2 + theta) * size;
 320
 321             ptf[0].X = x2 - dx;
 322             ptf[0].Y = y2 - dy;
 323             ptf[1].X = x2 + dx;
 324             ptf[1].Y = y2 + dy;
 325
 326             dx = cos(theta) * size;
 327             dy = sin(theta) * size;
 328
 329             ptf[2].X = x2 + dx;
 330             ptf[2].Y = y2 + dy;
 331
 332             transform_and_round_points(graphics, pt, ptf, 3);
 333             Polygon(graphics->hdc, pt, 3);
 334
 335             break;
 336         case LineCapRound:
 337             dx = dy = size / 2.0;
 338
 339             ptf[0].X = x2 - dx;
 340             ptf[0].Y = y2 - dy;
 341             ptf[1].X = x2 + dx;
 342             ptf[1].Y = y2 + dy;
 343
 344             dx = -cos(M_PI_2 + theta) * size;
 345             dy = -sin(M_PI_2 + theta) * size;
 346
 347             ptf[2].X = x2 - dx;
 348             ptf[2].Y = y2 - dy;
 349             ptf[3].X = x2 + dx;
 350             ptf[3].Y = y2 + dy;
 351
 352             transform_and_round_points(graphics, pt, ptf, 4);
 353             Pie(graphics->hdc, pt[0].x, pt[0].y, pt[1].x, pt[1].y, pt[2].x,
 354                 pt[2].y, pt[3].x, pt[3].y);
 355
 356             break;
 357         case LineCapCustom:
 358             if(!custom)
 359                 break;
 360
 361             count = custom->pathdata.Count;
 362             custptf = GdipAlloc(count * sizeof(PointF));
 363             custpt = GdipAlloc(count * sizeof(POINT));
 364             tp = GdipAlloc(count);
 365
 366             if(!custptf || !custpt || !tp || (GdipCreateMatrix(&matrix) != Ok))
 367                 goto custend;
 368
 369             memcpy(custptf, custom->pathdata.Points, count * sizeof(PointF));
 370
 371             GdipScaleMatrix(matrix, size, size, MatrixOrderAppend);
 372             GdipRotateMatrix(matrix, (180.0 / M_PI) * (theta - M_PI_2),
 373                              MatrixOrderAppend);
 374             GdipTranslateMatrix(matrix, x2, y2, MatrixOrderAppend);
 375             GdipTransformMatrixPoints(matrix, custptf, count);
 376
 377             transform_and_round_points(graphics, custpt, custptf, count);
 378
 379             for(i = 0; i < count; i++)
 380                 tp[i] = convert_path_point_type(custom->pathdata.Types[i]);
 381
 382             if(custom->fill){
 383                 BeginPath(graphics->hdc);
 384                 PolyDraw(graphics->hdc, custpt, tp, count);
 385                 EndPath(graphics->hdc);
 386                 StrokeAndFillPath(graphics->hdc);
 387             }
 388             else
 389                 PolyDraw(graphics->hdc, custpt, tp, count);
 390
 391 custend:
 392             GdipFree(custptf);
 393             GdipFree(custpt);
 394             GdipFree(tp);
 395             GdipDeleteMatrix(matrix);
 396             break;
 397         default:
 398             break;
 399     }
 400
 401     if(!customstroke){
 402         SelectObject(graphics->hdc, oldbrush);
 403         SelectObject(graphics->hdc, oldpen);
 404         DeleteObject(brush);
 405         DeleteObject(pen);
 406     }
 407 }
 408
 409 /* Shortens the line by the given percent by changing x2, y2.
 410  * If percent is > 1.0 then the line will change direction.
 411  * If percent is negative it can lengthen the line. */
 412 static void shorten_line_percent(REAL x1, REAL  y1, REAL *x2, REAL *y2, REAL percent)
 413 {
 414     REAL dist, theta, dx, dy;
 415
 416     if((y1 == *y2) && (x1 == *x2))
 417         return;
 418
 419     dist = sqrt((*x2 - x1) * (*x2 - x1) + (*y2 - y1) * (*y2 - y1)) * -percent;
 420     theta = gdiplus_atan2((*y2 - y1), (*x2 - x1));
 421     dx = cos(theta) * dist;
 422     dy = sin(theta) * dist;
 423
 424     *x2 = *x2 + dx;
 425     *y2 = *y2 + dy;
 426 }
 427
 428 /* Shortens the line by the given amount by changing x2, y2.
 429  * If the amount is greater than the distance, the line will become length 0.
 430  * If the amount is negative, it can lengthen the line. */
 431 static void shorten_line_amt(REAL x1, REAL y1, REAL *x2, REAL *y2, REAL amt)
 432 {
 433     REAL dx, dy, percent;
 434
 435     dx = *x2 - x1;
 436     dy = *y2 - y1;
 437     if(dx == 0 && dy == 0)
 438         return;
 439
 440     percent = amt / sqrt(dx * dx + dy * dy);
 441     if(percent >= 1.0){
 442         *x2 = x1;
 443         *y2 = y1;
 444         return;
 445     }
 446
 447     shorten_line_percent(x1, y1, x2, y2, percent);
 448 }
 449
 450 /* Draws lines between the given points, and if caps is true then draws an endcap
 451  * at the end of the last line.  FIXME: Startcaps not implemented. */
 452 static GpStatus draw_polyline(GpGraphics *graphics, GpPen *pen,
 453     GDIPCONST GpPointF * pt, INT count, BOOL caps)
 454 {
 455     POINT *pti = NULL;
 456     GpPointF *ptcopy = NULL;
 457     GpStatus status = GenericError;
 458
 459     if(!count)
 460         return Ok;
 461
 462     pti = GdipAlloc(count * sizeof(POINT));
 463     ptcopy = GdipAlloc(count * sizeof(GpPointF));
 464
 465     if(!pti || !ptcopy){
 466         status = OutOfMemory;
 467         goto end;
 468     }
 469
 470     memcpy(ptcopy, pt, count * sizeof(GpPointF));
 471
 472     if(caps){
 473         if(pen->endcap == LineCapArrowAnchor)
 474             shorten_line_amt(ptcopy[count-2].X, ptcopy[count-2].Y,
 475                              &ptcopy[count-1].X, &ptcopy[count-1].Y, pen->width);
 476         else if((pen->endcap == LineCapCustom) && pen->customend)
 477             shorten_line_amt(ptcopy[count-2].X, ptcopy[count-2].Y,
 478                              &ptcopy[count-1].X, &ptcopy[count-1].Y,
 479                              pen->customend->inset * pen->width);
 480
 481         if(pen->startcap == LineCapArrowAnchor)
 482             shorten_line_amt(ptcopy[1].X, ptcopy[1].Y,
 483                              &ptcopy[0].X, &ptcopy[0].Y, pen->width);
 484         else if((pen->startcap == LineCapCustom) && pen->customstart)
 485             shorten_line_amt(ptcopy[1].X, ptcopy[1].Y,
 486                              &ptcopy[0].X, &ptcopy[0].Y,
 487                              pen->customend->inset * pen->width);
 488
 489         draw_cap(graphics, pen->brush->lb.lbColor, pen->endcap, pen->width, pen->customend,
 490                  pt[count - 2].X, pt[count - 2].Y, pt[count - 1].X, pt[count - 1].Y);
 491         draw_cap(graphics, pen->brush->lb.lbColor, pen->startcap, pen->width, pen->customstart,
 492                          pt[1].X, pt[1].Y, pt[0].X, pt[0].Y);\
 493     }
 494
 495     transform_and_round_points(graphics, pti, ptcopy, count);
 496
 497     Polyline(graphics->hdc, pti, count);
 498
 499 end:
 500     GdipFree(pti);
 501     GdipFree(ptcopy);
 502
 503     return status;
 504 }
 505
 506 /* Conducts a linear search to find the bezier points that will back off
 507  * the endpoint of the curve by a distance of amt. Linear search works
 508  * better than binary in this case because there are multiple solutions,
 509  * and binary searches often find a bad one. I don't think this is what
 510  * Windows does but short of rendering the bezier without GDI's help it's
 511  * the best we can do. If rev then work from the start of the passed points
 512  * instead of the end. */
 513 static void shorten_bezier_amt(GpPointF * pt, REAL amt, BOOL rev)
 514 {
 515     GpPointF origpt[4];
 516     REAL percent = 0.00, dx, dy, origx, origy, diff = -1.0;
 517     INT i, first = 0, second = 1, third = 2, fourth = 3;
 518
 519     if(rev){
 520         first = 3;
 521         second = 2;
 522         third = 1;
 523         fourth = 0;
 524     }
 525
 526     origx = pt[fourth].X;
 527     origy = pt[fourth].Y;
 528     memcpy(origpt, pt, sizeof(GpPointF) * 4);
 529
 530     for(i = 0; (i < MAX_ITERS) && (diff < amt); i++){
 531         /* reset bezier points to original values */
 532         memcpy(pt, origpt, sizeof(GpPointF) * 4);
 533         /* Perform magic on bezier points. Order is important here.*/
 534         shorten_line_percent(pt[third].X, pt[third].Y, &pt[fourth].X, &pt[fourth].Y, percent);
 535         shorten_line_percent(pt[second].X, pt[second].Y, &pt[third].X, &pt[third].Y, percent);
 536         shorten_line_percent(pt[third].X, pt[third].Y, &pt[fourth].X, &pt[fourth].Y, percent);
 537         shorten_line_percent(pt[first].X, pt[first].Y, &pt[second].X, &pt[second].Y, percent);
 538         shorten_line_percent(pt[second].X, pt[second].Y, &pt[third].X, &pt[third].Y, percent);
 539         shorten_line_percent(pt[third].X, pt[third].Y, &pt[fourth].X, &pt[fourth].Y, percent);
 540
 541         dx = pt[fourth].X - origx;
 542         dy = pt[fourth].Y - origy;
 543
 544         diff = sqrt(dx * dx + dy * dy);
 545         percent += 0.0005 * amt;
 546     }
 547 }
 548
 549 /* Draws bezier curves between given points, and if caps is true then draws an
 550  * endcap at the end of the last line.  FIXME: Startcaps not implemented. */
 551 static GpStatus draw_polybezier(GpGraphics *graphics, GpPen *pen,
 552     GDIPCONST GpPointF * pt, INT count, BOOL caps)
 553 {
 554     POINT *pti, curpos;
 555     GpPointF *ptcopy;
 556     REAL x, y;
 557     GpStatus status = GenericError;
 558
 559     if(!count)
 560         return Ok;
 561
 562     pti = GdipAlloc(count * sizeof(POINT));
 563     ptcopy = GdipAlloc(count * sizeof(GpPointF));
 564
 565     if(!pti || !ptcopy){
 566         status = OutOfMemory;
 567         goto end;
 568     }
 569
 570     memcpy(ptcopy, pt, count * sizeof(GpPointF));
 571
 572     if(caps){
 573         if(pen->endcap == LineCapArrowAnchor)
 574             shorten_bezier_amt(&ptcopy[count-4], pen->width, FALSE);
 575         /* FIXME The following is seemingly correct only for baseinset < 0 or
 576          * baseinset > ~3. With smaller baseinsets, windows actually
 577          * lengthens the bezier line instead of shortening it. */
 578         else if((pen->endcap == LineCapCustom) && pen->customend){
 579             x = pt[count - 1].X;
 580             y = pt[count - 1].Y;
 581             shorten_line_amt(pt[count - 2].X, pt[count - 2].Y, &x, &y,
 582                              pen->width * pen->customend->inset);
 583             MoveToEx(graphics->hdc, roundr(pt[count - 1].X), roundr(pt[count - 1].Y), &curpos);
 584             LineTo(graphics->hdc, roundr(x), roundr(y));
 585             MoveToEx(graphics->hdc, curpos.x, curpos.y, NULL);
 586         }
 587
 588         if(pen->startcap == LineCapArrowAnchor)
 589             shorten_bezier_amt(ptcopy, pen->width, TRUE);
 590         else if((pen->startcap == LineCapCustom) && pen->customstart){
 591             x = ptcopy[0].X;
 592             y = ptcopy[0].Y;
 593             shorten_line_amt(ptcopy[1].X, ptcopy[1].Y, &x, &y,
 594                              pen->width * pen->customend->inset);
 595             MoveToEx(graphics->hdc, roundr(pt[0].X), roundr(pt[0].Y), &curpos);
 596             LineTo(graphics->hdc, roundr(x), roundr(y));
 597             MoveToEx(graphics->hdc, curpos.x, curpos.y, NULL);
 598         }
 599
 600         /* the direction of the line cap is parallel to the direction at the
 601          * end of the bezier (which, if it has been shortened, is not the same
 602          * as the direction from pt[count-2] to pt[count-1]) */
 603         draw_cap(graphics, pen->brush->lb.lbColor, pen->endcap, pen->width, pen->customend,
 604             pt[count - 1].X - (ptcopy[count - 1].X - ptcopy[count - 2].X),
 605             pt[count - 1].Y - (ptcopy[count - 1].Y - ptcopy[count - 2].Y),
 606             pt[count - 1].X, pt[count - 1].Y);
 607
 608         draw_cap(graphics, pen->brush->lb.lbColor, pen->startcap, pen->width, pen->customstart,
 609             pt[0].X - (ptcopy[0].X - ptcopy[1].X),
 610             pt[0].Y - (ptcopy[0].Y - ptcopy[1].Y), pt[0].X, pt[0].Y);
 611     }
 612
 613     transform_and_round_points(graphics, pti, ptcopy, count);
 614
 615     PolyBezier(graphics->hdc, pti, count);
 616
 617     status = Ok;
 618
 619 end:
 620     GdipFree(pti);
 621     GdipFree(ptcopy);
 622
 623     return status;
 624 }
 625
 626 /* Draws a combination of bezier curves and lines between points. */
 627 static GpStatus draw_poly(GpGraphics *graphics, GpPen *pen, GDIPCONST GpPointF * pt,
 628     GDIPCONST BYTE * types, INT count, BOOL caps)
 629 {
 630     POINT *pti = GdipAlloc(count * sizeof(POINT)), curpos;
 631     BYTE *tp = GdipAlloc(count);
 632     GpPointF *ptcopy = GdipAlloc(count * sizeof(GpPointF));
 633     REAL x = pt[count - 1].X, y = pt[count - 1].Y;
 634     INT i, j;
 635     GpStatus status = GenericError;
 636
 637     if(!count){
 638         status = Ok;
 639         goto end;
 640     }
 641     if(!pti || !tp || !ptcopy){
 642         status = OutOfMemory;
 643         goto end;
 644     }
 645
 646     for(i = 1; i < count; i++){
 647         if((types[i] & PathPointTypePathTypeMask) == PathPointTypeBezier){
 648             if((i + 2 >= count) || !(types[i + 1] & PathPointTypeBezier)
 649                 || !(types[i + 1] & PathPointTypeBezier)){
 650                 ERR("Bad bezier points\n");
 651                 goto end;
 652             }
 653             i += 2;
 654         }
 655     }
 656
 657     memcpy(ptcopy, pt, count * sizeof(GpPointF));
 658
 659     /* If we are drawing caps, go through the points and adjust them accordingly,
 660      * and draw the caps. */
 661     if(caps){
 662         switch(types[count - 1] & PathPointTypePathTypeMask){
 663             case PathPointTypeBezier:
 664                 if(pen->endcap == LineCapArrowAnchor)
 665                     shorten_bezier_amt(&ptcopy[count - 4], pen->width, FALSE);
 666                 else if((pen->endcap == LineCapCustom) && pen->customend){
 667                     x = pt[count - 1].X;
 668                     y = pt[count - 1].Y;
 669                     shorten_line_amt(pt[count - 2].X, pt[count - 2].Y, &x, &y,
 670                                      pen->width * pen->customend->inset);
 671                     MoveToEx(graphics->hdc, roundr(pt[count - 1].X),
 672                              roundr(pt[count - 1].Y), &curpos);
 673                     LineTo(graphics->hdc, roundr(x), roundr(y));
 674                     MoveToEx(graphics->hdc, curpos.x, curpos.y, NULL);
 675                 }
 676
 677                 draw_cap(graphics, pen->brush->lb.lbColor, pen->endcap, pen->width, pen->customend,
 678                     pt[count - 1].X - (ptcopy[count - 1].X - ptcopy[count - 2].X),
 679                     pt[count - 1].Y - (ptcopy[count - 1].Y - ptcopy[count - 2].Y),
 680                     pt[count - 1].X, pt[count - 1].Y);
 681
 682                 break;
 683             case PathPointTypeLine:
 684                 if(pen->endcap == LineCapArrowAnchor)
 685                     shorten_line_amt(ptcopy[count - 2].X, ptcopy[count - 2].Y,
 686                                      &ptcopy[count - 1].X, &ptcopy[count - 1].Y,
 687                                      pen->width);
 688                 else if((pen->endcap == LineCapCustom) && pen->customend)
 689                     shorten_line_amt(ptcopy[count - 2].X, ptcopy[count - 2].Y,
 690                                      &ptcopy[count - 1].X, &ptcopy[count - 1].Y,
 691                                      pen->customend->inset * pen->width);
 692
 693                 draw_cap(graphics, pen->brush->lb.lbColor, pen->endcap, pen->width, pen->customend,
 694                          pt[count - 2].X, pt[count - 2].Y, pt[count - 1].X,
 695                          pt[count - 1].Y);
 696
 697                 break;
 698             default:
 699                 ERR("Bad path last point\n");
 700                 goto end;
 701         }
 702
 703         /* Find start of points */
 704         for(j = 1; j < count && ((types[j] & PathPointTypePathTypeMask)
 705             == PathPointTypeStart); j++);
 706
 707         switch(types[j] & PathPointTypePathTypeMask){
 708             case PathPointTypeBezier:
 709                 if(pen->startcap == LineCapArrowAnchor)
 710                     shorten_bezier_amt(&ptcopy[j - 1], pen->width, TRUE);
 711                 else if((pen->startcap == LineCapCustom) && pen->customstart){
 712                     x = pt[j - 1].X;
 713                     y = pt[j - 1].Y;
 714                     shorten_line_amt(ptcopy[j].X, ptcopy[j].Y, &x, &y,
 715                                      pen->width * pen->customstart->inset);
 716                     MoveToEx(graphics->hdc, roundr(pt[j - 1].X), roundr(pt[j - 1].Y), &curpos);
 717                     LineTo(graphics->hdc, roundr(x), roundr(y));
 718                     MoveToEx(graphics->hdc, curpos.x, curpos.y, NULL);
 719                 }
 720
 721                 draw_cap(graphics, pen->brush->lb.lbColor, pen->startcap, pen->width, pen->customstart,
 722                     pt[j - 1].X - (ptcopy[j - 1].X - ptcopy[j].X),
 723                     pt[j - 1].Y - (ptcopy[j - 1].Y - ptcopy[j].Y),
 724                     pt[j - 1].X, pt[j - 1].Y);
 725
 726                 break;
 727             case PathPointTypeLine:
 728                 if(pen->startcap == LineCapArrowAnchor)
 729                     shorten_line_amt(ptcopy[j].X, ptcopy[j].Y,
 730                                      &ptcopy[j - 1].X, &ptcopy[j - 1].Y,
 731                                      pen->width);
 732                 else if((pen->startcap == LineCapCustom) && pen->customstart)
 733                     shorten_line_amt(ptcopy[j].X, ptcopy[j].Y,
 734                                      &ptcopy[j - 1].X, &ptcopy[j - 1].Y,
 735                                      pen->customstart->inset * pen->width);
 736
 737                 draw_cap(graphics, pen->brush->lb.lbColor, pen->endcap, pen->width, pen->customstart,
 738                          pt[j].X, pt[j].Y, pt[j - 1].X,
 739                          pt[j - 1].Y);
 740
 741                 break;
 742             default:
 743                 ERR("Bad path points\n");
 744                 goto end;
 745         }
 746     }
 747
 748     transform_and_round_points(graphics, pti, ptcopy, count);
 749
 750     for(i = 0; i < count; i++){
 751         tp[i] = convert_path_point_type(types[i]);
 752     }
 753
 754     PolyDraw(graphics->hdc, pti, tp, count);
 755
 756     status = Ok;
 757
 758 end:
 759     GdipFree(pti);
 760     GdipFree(ptcopy);
 761     GdipFree(tp);
 762
 763     return status;
 764 }
 765
 766 GpStatus WINGDIPAPI GdipCreateFromHDC(HDC hdc, GpGraphics **graphics)
 767 {
 768     GpStatus retval;
 769
 770     if(hdc == NULL)
 771         return OutOfMemory;
 772
 773     if(graphics == NULL)
 774         return InvalidParameter;
 775
 776     *graphics = GdipAlloc(sizeof(GpGraphics));
 777     if(!*graphics)  return OutOfMemory;
 778
 779     if((retval = GdipCreateMatrix(&(*graphics)->worldtrans)) != Ok){
 780         GdipFree(*graphics);
 781         return retval;
 782     }
 783
 784     (*graphics)->hdc = hdc;
 785     (*graphics)->hwnd = NULL;
 786     (*graphics)->smoothing = SmoothingModeDefault;
 787     (*graphics)->compqual = CompositingQualityDefault;
 788     (*graphics)->interpolation = InterpolationModeDefault;
 789     (*graphics)->pixeloffset = PixelOffsetModeDefault;
 790     (*graphics)->unit = UnitDisplay;
 791     (*graphics)->scale = 1.0;
 792
 793     return Ok;
 794 }
 795
 796 GpStatus WINGDIPAPI GdipCreateFromHWND(HWND hwnd, GpGraphics **graphics)
 797 {
 798     GpStatus ret;
 799
 800     if((ret = GdipCreateFromHDC(GetDC(hwnd), graphics)) != Ok)
 801         return ret;
 802
 803     (*graphics)->hwnd = hwnd;
 804
 805     return Ok;
 806 }
 807
 808 GpStatus WINGDIPAPI GdipCreateMetafileFromEmf(HENHMETAFILE hemf, BOOL delete,
 809     GpMetafile **metafile)
 810 {
 811     static int calls;
 812
 813     if(!hemf || !metafile)
 814         return InvalidParameter;
 815
 816     if(!(calls++))
 817         FIXME("not implemented\n");
 818
 819     return NotImplemented;
 820 }
 821
 822 GpStatus WINGDIPAPI GdipCreateMetafileFromWmf(HMETAFILE hwmf, BOOL delete,
 823     GDIPCONST WmfPlaceableFileHeader * placeable, GpMetafile **metafile)
 824 {
 825     static int calls;
 826
 827     if(!hwmf || !metafile || !placeable)
 828         return InvalidParameter;
 829
 830     if(!(calls++))
 831         FIXME("not implemented\n");
 832
 833     return NotImplemented;
 834 }
 835
 836 GpStatus WINGDIPAPI GdipDeleteGraphics(GpGraphics *graphics)
 837 {
 838     if(!graphics) return InvalidParameter;
 839     if(graphics->hwnd)
 840         ReleaseDC(graphics->hwnd, graphics->hdc);
 841
 842     GdipDeleteMatrix(graphics->worldtrans);
 843     HeapFree(GetProcessHeap(), 0, graphics);
 844
 845     return Ok;
 846 }
 847
 848 GpStatus WINGDIPAPI GdipDrawArc(GpGraphics *graphics, GpPen *pen, REAL x,
 849     REAL y, REAL width, REAL height, REAL startAngle, REAL sweepAngle)
 850 {
 851     INT save_state, num_pts;
 852     GpPointF points[MAX_ARC_PTS];
 853     GpStatus retval;
 854
 855     if(!graphics || !pen)
 856         return InvalidParameter;
 857
 858     num_pts = arc2polybezier(points, x, y, width, height, startAngle, sweepAngle);
 859
 860     save_state = prepare_dc(graphics, pen);
 861
 862     retval = draw_polybezier(graphics, pen, points, num_pts, TRUE);
 863
 864     restore_dc(graphics, save_state);
 865
 866     return retval;
 867 }
 868
 869 GpStatus WINGDIPAPI GdipDrawBezier(GpGraphics *graphics, GpPen *pen, REAL x1,
 870     REAL y1, REAL x2, REAL y2, REAL x3, REAL y3, REAL x4, REAL y4)
 871 {
 872     INT save_state;
 873     GpPointF pt[4];
 874     GpStatus retval;
 875
 876     if(!graphics || !pen)
 877         return InvalidParameter;
 878
 879     pt[0].X = x1;
 880     pt[0].Y = y1;
 881     pt[1].X = x2;
 882     pt[1].Y = y2;
 883     pt[2].X = x3;
 884     pt[2].Y = y3;
 885     pt[3].X = x4;
 886     pt[3].Y = y4;
 887
 888     save_state = prepare_dc(graphics, pen);
 889
 890     retval = draw_polybezier(graphics, pen, pt, 4, TRUE);
 891
 892     restore_dc(graphics, save_state);
 893
 894     return retval;
 895 }
 896
 897 /* Approximates cardinal spline with Bezier curves. */
 898 GpStatus WINGDIPAPI GdipDrawCurve2(GpGraphics *graphics, GpPen *pen,
 899     GDIPCONST GpPointF *points, INT count, REAL tension)
 900 {
 901     /* PolyBezier expects count*3-2 points. */
 902     INT i, len_pt = count*3-2, save_state;
 903     GpPointF *pt;
 904     REAL x1, x2, y1, y2;
 905     GpStatus retval;
 906
 907     if(!graphics || !pen)
 908         return InvalidParameter;
 909
 910     pt = GdipAlloc(len_pt * sizeof(GpPointF));
 911     tension = tension * TENSION_CONST;
 912
 913     calc_curve_bezier_endp(points[0].X, points[0].Y, points[1].X, points[1].Y,
 914         tension, &x1, &y1);
 915
 916     pt[0].X = points[0].X;
 917     pt[0].Y = points[0].Y;
 918     pt[1].X = x1;
 919     pt[1].Y = y1;
 920
 921     for(i = 0; i < count-2; i++){
 922         calc_curve_bezier(&(points[i]), tension, &x1, &y1, &x2, &y2);
 923
 924         pt[3*i+2].X = x1;
 925         pt[3*i+2].Y = y1;
 926         pt[3*i+3].X = points[i+1].X;
 927         pt[3*i+3].Y = points[i+1].Y;
 928         pt[3*i+4].X = x2;
 929         pt[3*i+4].Y = y2;
 930     }
 931
 932     calc_curve_bezier_endp(points[count-1].X, points[count-1].Y,
 933         points[count-2].X, points[count-2].Y, tension, &x1, &y1);
 934
 935     pt[len_pt-2].X = x1;
 936     pt[len_pt-2].Y = y1;
 937     pt[len_pt-1].X = points[count-1].X;
 938     pt[len_pt-1].Y = points[count-1].Y;
 939
 940     save_state = prepare_dc(graphics, pen);
 941
 942     retval = draw_polybezier(graphics, pen, pt, len_pt, TRUE);
 943
 944     GdipFree(pt);
 945     restore_dc(graphics, save_state);
 946
 947     return retval;
 948 }
 949
 950 GpStatus WINGDIPAPI GdipDrawLineI(GpGraphics *graphics, GpPen *pen, INT x1,
 951     INT y1, INT x2, INT y2)
 952 {
 953     INT save_state;
 954     GpPointF pt[2];
 955     GpStatus retval;
 956
 957     if(!pen || !graphics)
 958         return InvalidParameter;
 959
 960     pt[0].X = (REAL)x1;
 961     pt[0].Y = (REAL)y1;
 962     pt[1].X = (REAL)x2;
 963     pt[1].Y = (REAL)y2;
 964
 965     save_state = prepare_dc(graphics, pen);
 966
 967     retval = draw_polyline(graphics, pen, pt, 2, TRUE);
 968
 969     restore_dc(graphics, save_state);
 970
 971     return retval;
 972 }
 973
 974 GpStatus WINGDIPAPI GdipDrawLines(GpGraphics *graphics, GpPen *pen, GDIPCONST
 975     GpPointF *points, INT count)
 976 {
 977     INT save_state;
 978     GpStatus retval;
 979
 980     if(!pen || !graphics || (count < 2))
 981         return InvalidParameter;
 982
 983     save_state = prepare_dc(graphics, pen);
 984
 985     retval = draw_polyline(graphics, pen, points, count, TRUE);
 986
 987     restore_dc(graphics, save_state);
 988
 989     return retval;
 990 }
 991
 992 GpStatus WINGDIPAPI GdipDrawPath(GpGraphics *graphics, GpPen *pen, GpPath *path)
 993 {
 994     INT save_state;
 995     GpStatus retval;
 996
 997     if(!pen || !graphics)
 998         return InvalidParameter;
 999
1000     save_state = prepare_dc(graphics, pen);
1001
1002     retval = draw_poly(graphics, pen, path->pathdata.Points,
1003                        path->pathdata.Types, path->pathdata.Count, TRUE);
1004
1005     restore_dc(graphics, save_state);
1006
1007     return retval;
1008 }
1009
1010 GpStatus WINGDIPAPI GdipDrawPie(GpGraphics *graphics, GpPen *pen, REAL x,
1011     REAL y, REAL width, REAL height, REAL startAngle, REAL sweepAngle)
1012 {
1013     INT save_state;
1014
1015     if(!graphics || !pen)
1016         return InvalidParameter;
1017
1018     save_state = prepare_dc(graphics, pen);
1019     SelectObject(graphics->hdc, GetStockObject(NULL_BRUSH));
1020
1021     draw_pie(graphics, x, y, width, height, startAngle, sweepAngle);
1022
1023     restore_dc(graphics, save_state);
1024
1025     return Ok;
1026 }
1027
1028 GpStatus WINGDIPAPI GdipDrawRectangleI(GpGraphics *graphics, GpPen *pen, INT x,
1029     INT y, INT width, INT height)
1030 {
1031     INT save_state;
1032
1033     if(!pen || !graphics)
1034         return InvalidParameter;
1035
1036     save_state = prepare_dc(graphics, pen);
1037     SelectObject(graphics->hdc, GetStockObject(NULL_BRUSH));
1038
1039     Rectangle(graphics->hdc, x, y, x + width, y + height);
1040
1041     restore_dc(graphics, save_state);
1042
1043     return Ok;
1044 }
1045
1046 GpStatus WINGDIPAPI GdipFillPath(GpGraphics *graphics, GpBrush *brush, GpPath *path)
1047 {
1048     INT save_state;
1049     GpStatus retval;
1050
1051     if(!brush || !graphics || !path)
1052         return InvalidParameter;
1053
1054     save_state = SaveDC(graphics->hdc);
1055     EndPath(graphics->hdc);
1056     SelectObject(graphics->hdc, brush->gdibrush);
1057     SetPolyFillMode(graphics->hdc, (path->fill == FillModeAlternate ? ALTERNATE
1058                                                                     : WINDING));
1059
1060     BeginPath(graphics->hdc);
1061     retval = draw_poly(graphics, NULL, path->pathdata.Points,
1062                        path->pathdata.Types, path->pathdata.Count, FALSE);
1063
1064     if(retval != Ok)
1065         goto end;
1066
1067     EndPath(graphics->hdc);
1068     FillPath(graphics->hdc);
1069
1070     retval = Ok;
1071
1072 end:
1073     RestoreDC(graphics->hdc, save_state);
1074
1075     return retval;
1076 }
1077
1078 GpStatus WINGDIPAPI GdipFillPie(GpGraphics *graphics, GpBrush *brush, REAL x,
1079     REAL y, REAL width, REAL height, REAL startAngle, REAL sweepAngle)
1080 {
1081     INT save_state;
1082
1083     if(!graphics || !brush)
1084         return InvalidParameter;
1085
1086     save_state = SaveDC(graphics->hdc);
1087     EndPath(graphics->hdc);
1088     SelectObject(graphics->hdc, brush->gdibrush);
1089     SelectObject(graphics->hdc, GetStockObject(NULL_PEN));
1090
1091     draw_pie(graphics, x, y, width, height, startAngle, sweepAngle);
1092
1093     RestoreDC(graphics->hdc, save_state);
1094
1095     return Ok;
1096 }
1097
1098 GpStatus WINGDIPAPI GdipFillPolygonI(GpGraphics *graphics, GpBrush *brush,
1099     GDIPCONST GpPoint *points, INT count, GpFillMode fillMode)
1100 {
1101     INT save_state, i;
1102     GpPointF *ptf = NULL;
1103     POINT *pti = NULL;
1104     GpStatus retval = Ok;
1105
1106     if(!graphics || !brush || !points || !count)
1107         return InvalidParameter;
1108
1109     ptf = GdipAlloc(count * sizeof(GpPointF));
1110     pti = GdipAlloc(count * sizeof(POINT));
1111     if(!ptf || !pti){
1112         retval = OutOfMemory;
1113         goto end;
1114     }
1115
1116     for(i = 0; i < count; i ++){
1117         ptf[i].X = (REAL) points[i].X;
1118         ptf[i].Y = (REAL) points[i].Y;
1119     }
1120
1121     save_state = SaveDC(graphics->hdc);
1122     EndPath(graphics->hdc);
1123     SelectObject(graphics->hdc, brush->gdibrush);
1124     SelectObject(graphics->hdc, GetStockObject(NULL_PEN));
1125     SetPolyFillMode(graphics->hdc, (fillMode == FillModeAlternate ? ALTERNATE
1126                                                                   : WINDING));
1127
1128     transform_and_round_points(graphics, pti, ptf, count);
1129     Polygon(graphics->hdc, pti, count);
1130
1131     RestoreDC(graphics->hdc, save_state);
1132
1133 end:
1134     GdipFree(ptf);
1135     GdipFree(pti);
1136
1137     return retval;
1138 }
1139
1140 /* FIXME: Compositing quality is not used anywhere except the getter/setter. */
1141 GpStatus WINGDIPAPI GdipGetCompositingQuality(GpGraphics *graphics,
1142     CompositingQuality *quality)
1143 {
1144     if(!graphics || !quality)
1145         return InvalidParameter;
1146
1147     *quality = graphics->compqual;
1148
1149     return Ok;
1150 }
1151
1152 /* FIXME: Interpolation mode is not used anywhere except the getter/setter. */
1153 GpStatus WINGDIPAPI GdipGetInterpolationMode(GpGraphics *graphics,
1154     InterpolationMode *mode)
1155 {
1156     if(!graphics || !mode)
1157         return InvalidParameter;
1158
1159     *mode = graphics->interpolation;
1160
1161     return Ok;
1162 }
1163
1164 GpStatus WINGDIPAPI GdipGetPageScale(GpGraphics *graphics, REAL *scale)
1165 {
1166     if(!graphics || !scale)
1167         return InvalidParameter;
1168
1169     *scale = graphics->scale;
1170
1171     return Ok;
1172 }
1173
1174 GpStatus WINGDIPAPI GdipGetPageUnit(GpGraphics *graphics, GpUnit *unit)
1175 {
1176     if(!graphics || !unit)
1177         return InvalidParameter;
1178
1179     *unit = graphics->unit;
1180
1181     return Ok;
1182 }
1183
1184 /* FIXME: Pixel offset mode is not used anywhere except the getter/setter. */
1185 GpStatus WINGDIPAPI GdipGetPixelOffsetMode(GpGraphics *graphics, PixelOffsetMode
1186     *mode)
1187 {
1188     if(!graphics || !mode)
1189         return InvalidParameter;
1190
1191     *mode = graphics->pixeloffset;
1192
1193     return Ok;
1194 }
1195
1196 /* FIXME: Smoothing mode is not used anywhere except the getter/setter. */
1197 GpStatus WINGDIPAPI GdipGetSmoothingMode(GpGraphics *graphics, SmoothingMode *mode)
1198 {
1199     if(!graphics || !mode)
1200         return InvalidParameter;
1201
1202     *mode = graphics->smoothing;
1203
1204     return Ok;
1205 }
1206
1207 GpStatus WINGDIPAPI GdipGetWorldTransform(GpGraphics *graphics, GpMatrix *matrix)
1208 {
1209     if(!graphics || !matrix)
1210         return InvalidParameter;
1211
1212     memcpy(matrix, graphics->worldtrans, sizeof(GpMatrix));
1213     return Ok;
1214 }
1215
1216 GpStatus WINGDIPAPI GdipRestoreGraphics(GpGraphics *graphics, GraphicsState state)
1217 {
1218     static int calls;
1219
1220     if(!graphics)
1221         return InvalidParameter;
1222
1223     if(!(calls++))
1224         FIXME("graphics state not implemented\n");
1225
1226     return NotImplemented;
1227 }
1228
1229 GpStatus WINGDIPAPI GdipSaveGraphics(GpGraphics *graphics, GraphicsState *state)
1230 {
1231     static int calls;
1232
1233     if(!graphics || !state)
1234         return InvalidParameter;
1235
1236     if(!(calls++))
1237         FIXME("graphics state not implemented\n");
1238
1239     return NotImplemented;
1240 }
1241
1242 GpStatus WINGDIPAPI GdipSetCompositingQuality(GpGraphics *graphics,
1243     CompositingQuality quality)
1244 {
1245     if(!graphics)
1246         return InvalidParameter;
1247
1248     graphics->compqual = quality;
1249
1250     return Ok;
1251 }
1252
1253 GpStatus WINGDIPAPI GdipSetInterpolationMode(GpGraphics *graphics,
1254     InterpolationMode mode)
1255 {
1256     if(!graphics)
1257         return InvalidParameter;
1258
1259     graphics->interpolation = mode;
1260
1261     return Ok;
1262 }
1263
1264 GpStatus WINGDIPAPI GdipSetPageScale(GpGraphics *graphics, REAL scale)
1265 {
1266     if(!graphics || (scale <= 0.0))
1267         return InvalidParameter;
1268
1269     graphics->scale = scale;
1270
1271     return Ok;
1272 }
1273
1274 GpStatus WINGDIPAPI GdipSetPageUnit(GpGraphics *graphics, GpUnit unit)
1275 {
1276     if(!graphics || (unit == UnitWorld))
1277         return InvalidParameter;
1278
1279     graphics->unit = unit;
1280
1281     return Ok;
1282 }
1283
1284 GpStatus WINGDIPAPI GdipSetPixelOffsetMode(GpGraphics *graphics, PixelOffsetMode
1285     mode)
1286 {
1287     if(!graphics)
1288         return InvalidParameter;
1289
1290     graphics->pixeloffset = mode;
1291
1292     return Ok;
1293 }
1294
1295 GpStatus WINGDIPAPI GdipSetSmoothingMode(GpGraphics *graphics, SmoothingMode mode)
1296 {
1297     if(!graphics)
1298         return InvalidParameter;
1299
1300     graphics->smoothing = mode;
1301
1302     return Ok;
1303 }
1304
1305 GpStatus WINGDIPAPI GdipSetWorldTransform(GpGraphics *graphics, GpMatrix *matrix)
1306 {
1307     if(!graphics || !matrix)
1308         return InvalidParameter;
1309
1310     GdipDeleteMatrix(graphics->worldtrans);
1311     return GdipCloneMatrix(matrix, &graphics->worldtrans);
1312 }