2 * draw.c -- drawing routines for XBoard
4 * Copyright 1991 by Digital Equipment Corporation, Maynard,
7 * Enhancements Copyright 1992-2001, 2002, 2003, 2004, 2005, 2006,
8 * 2007, 2008, 2009, 2010, 2011, 2012 Free Software Foundation, Inc.
10 * The following terms apply to Digital Equipment Corporation's copyright
12 * ------------------------------------------------------------------------
15 * Permission to use, copy, modify, and distribute this software and its
16 * documentation for any purpose and without fee is hereby granted,
17 * provided that the above copyright notice appear in all copies and that
18 * both that copyright notice and this permission notice appear in
19 * supporting documentation, and that the name of Digital not be
20 * used in advertising or publicity pertaining to distribution of the
21 * software without specific, written prior permission.
23 * DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
24 * ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
25 * DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
26 * ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
27 * WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
28 * ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
30 * ------------------------------------------------------------------------
32 * The following terms apply to the enhanced version of XBoard
33 * distributed by the Free Software Foundation:
34 * ------------------------------------------------------------------------
36 * GNU XBoard is free software: you can redistribute it and/or modify
37 * it under the terms of the GNU General Public License as published by
38 * the Free Software Foundation, either version 3 of the License, or (at
39 * your option) any later version.
41 * GNU XBoard is distributed in the hope that it will be useful, but
42 * WITHOUT ANY WARRANTY; without even the implied warranty of
43 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
44 * General Public License for more details.
46 * You should have received a copy of the GNU General Public License
47 * along with this program. If not, see http://www.gnu.org/licenses/. *
49 *------------------------------------------------------------------------
50 ** See the file ChangeLog for a revision history. */
56 #include <cairo/cairo.h>
57 #include <cairo/cairo-xlib.h>
62 #else /* not STDC_HEADERS */
63 extern char *getenv();
66 # else /* not HAVE_STRING_H */
68 # endif /* not HAVE_STRING_H */
69 #endif /* not STDC_HEADERS */
76 // [HGM] bitmaps: put before incuding the bitmaps / pixmaps, to know how many piece types there are.
80 #include "pixmaps/pixmaps.h"
82 #include "bitmaps/bitmaps.h"
87 #include "xevalgraph.h"
99 #define usleep(t) _sleep2(((t)+500)/1000)
103 # define _(s) gettext (s)
104 # define N_(s) gettext_noop (s)
112 Boolean cairoAnimate;
114 cairo_surface_t *csBoardWindow;
115 static cairo_surface_t *pngPieceImages[2][(int)BlackPawn+4]; // png 256 x 256 images
116 static cairo_surface_t *pngPieceBitmaps[2][(int)BlackPawn]; // scaled pieces as used
117 static cairo_surface_t *pngPieceBitmaps2[2][(int)BlackPawn+4]; // scaled pieces in store
118 static cairo_surface_t *pngBoardBitmap[2];
119 int useTexture, textureW[2], textureH[2];
121 #define pieceToSolid(piece) &pieceBitmap[SOLID][(piece) % (int)BlackPawn]
122 #define pieceToOutline(piece) &pieceBitmap[OUTLINE][(piece) % (int)BlackPawn]
124 #define White(piece) ((int)(piece) < (int)BlackPawn)
128 } gridSegments[BOARD_RANKS + BOARD_FILES + 2];
136 currBoard = (dual ? &mainOptions[W_BOARD] : &dualOptions[3]);
137 csBoardWindow = DRAWABLE(currBoard);
140 #define BoardSize int
142 InitDrawingSizes (BoardSize boardSize, int flags)
143 { // [HGM] resize is functional now, but for board format changes only (nr of ranks, files)
144 int boardWidth, boardHeight;
146 static int oldWidth, oldHeight;
147 static VariantClass oldVariant;
148 static int oldMono = -1, oldTwoBoards = 0;
149 extern Widget formWidget;
151 if(!formWidget) return;
153 if(oldTwoBoards && !twoBoards) PopDown(DummyDlg);
154 oldTwoBoards = twoBoards;
156 if(appData.overrideLineGap >= 0) lineGap = appData.overrideLineGap;
157 boardWidth = lineGap + BOARD_WIDTH * (squareSize + lineGap);
158 boardHeight = lineGap + BOARD_HEIGHT * (squareSize + lineGap);
160 if(boardWidth != oldWidth || boardHeight != oldHeight) { // do resizing stuff only if size actually changed
162 oldWidth = boardWidth; oldHeight = boardHeight;
166 * Inhibit shell resizing.
168 ResizeBoardWindow(boardWidth, boardHeight, 0);
173 // [HGM] pieces: tailor piece bitmaps to needs of specific variant
176 if(gameInfo.variant != oldVariant) { // and only if variant changed
180 for(p=0; p<=(int)WhiteKing; p++)
181 pngPieceBitmaps[i][p] = pngPieceBitmaps2[i][p]; // defaults
182 if(gameInfo.variant == VariantShogi) {
183 pngPieceBitmaps[i][(int)WhiteCannon] = pngPieceBitmaps2[i][(int)WhiteKing+1];
184 pngPieceBitmaps[i][(int)WhiteNightrider] = pngPieceBitmaps2[i][(int)WhiteKing+2];
185 pngPieceBitmaps[i][(int)WhiteSilver] = pngPieceBitmaps2[i][(int)WhiteKing+3];
186 pngPieceBitmaps[i][(int)WhiteGrasshopper] = pngPieceBitmaps2[i][(int)WhiteKing+4];
187 pngPieceBitmaps[i][(int)WhiteQueen] = pngPieceBitmaps2[i][(int)WhiteLance];
190 if(gameInfo.variant == VariantGothic) {
191 pngPieceBitmaps[i][(int)WhiteMarshall] = pngPieceBitmaps2[i][(int)WhiteSilver];
194 if(gameInfo.variant == VariantSChess) {
195 pngPieceBitmaps[i][(int)WhiteAngel] = pngPieceBitmaps2[i][(int)WhiteFalcon];
196 pngPieceBitmaps[i][(int)WhiteMarshall] = pngPieceBitmaps2[i][(int)WhiteAlfil];
199 oldMono = -10; // kludge to force recreation of animation masks
200 oldVariant = gameInfo.variant;
203 oldMono = appData.monoMode;
207 CreatePNGBoard (char *s, int kind)
209 if(!appData.useBitmaps || s == NULL || *s == 0 || *s == '*') { useTexture &= ~(kind+1); return; }
210 if(strstr(s, ".png")) {
211 cairo_surface_t *img = cairo_image_surface_create_from_png (s);
213 useTexture |= kind + 1; pngBoardBitmap[kind] = img;
214 textureW[kind] = cairo_image_surface_get_width (img);
215 textureH[kind] = cairo_image_surface_get_height (img);
220 char *pngPieceNames[] = // must be in same order as internal piece encoding
221 { "Pawn", "Knight", "Bishop", "Rook", "Queen", "Advisor", "Elephant", "Archbishop", "Marshall", "Gold", "Commoner",
222 "Canon", "Nightrider", "CrownedBishop", "CrownedRook", "Princess", "Chancellor", "Hawk", "Lance", "Cobra", "Unicorn", "King",
223 "GoldKnight", "GoldLance", "GoldPawn", "GoldSilver", NULL
227 ConvertPixmap (int color, int piece)
229 int i, j, stride, f, colcode[10], w, b;
231 cairo_surface_t *res;
232 XpmPieces *p = builtInXpms + 10;
233 char **pixels = p->xpm[piece % BlackPawn][2*color];
235 sscanf(pixels[0], "%*d %*d %d", &f);
236 sscanf(appData.whitePieceColor+1, "%x", &w);
237 sscanf(appData.blackPieceColor+1, "%x", &b);
238 res = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, p->size, p->size);
239 stride = cairo_image_surface_get_stride(res);
240 buf = (int *) cairo_image_surface_get_data(res);
242 ch[i] = pixels[i+1][0];
244 if(strstr(pixels[i+1], "black")) colcode[i] = 0xFF000000; // 0xFF000000 + (color ? b : 0);
245 if(strstr(pixels[i+1], "white")) colcode[i] = 0xFFFFFFCC; // 0xFF000000 + w;
247 for(i=0; i<p->size; i++) {
248 for(j=0; j<p->size; j++) {
249 char c = pixels[i+f+1][j];
251 for(k=0; ch[k] != c && k < f; k++);
252 buf[i*p->size + j] = colcode[k];
255 cairo_surface_mark_dirty(res);
260 ScaleOnePiece (char *name, int color, int piece)
264 cairo_surface_t *img, *cs;
267 if((img = pngPieceImages[color][piece]) == NULL) { // if PNG file for this piece was not yet read, read it now and store it
268 if(!*appData.pngDirectory) img = ConvertPixmap(color, piece); else {
269 snprintf(buf, MSG_SIZ, "%s/%s%s.png", appData.pngDirectory, color ? "Black" : "White", pngPieceNames[piece]);
270 img = cairo_image_surface_create_from_png (buf);
271 if(cairo_surface_status(img) != CAIRO_STATUS_SUCCESS) img = ConvertPixmap(color, piece);
274 pngPieceImages[color][piece] = img;
275 // create new bitmap to hold scaled piece image (and remove any old)
276 if(pngPieceBitmaps2[color][piece]) cairo_surface_destroy (pngPieceBitmaps2[color][piece]);
277 pngPieceBitmaps2[color][piece] = cs = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, squareSize, squareSize);
278 if(piece <= WhiteKing) pngPieceBitmaps[color][piece] = cs;
279 // scaled copying of the raw png image
280 cr = cairo_create(cs);
281 w = cairo_image_surface_get_width (img);
282 h = cairo_image_surface_get_height (img);
283 cairo_scale(cr, squareSize/w, squareSize/h);
284 cairo_set_source_surface (cr, img, 0, 0);
287 { // operate on bitmap to color it (king-size hack...)
288 int stride = cairo_image_surface_get_stride(cs)/4;
289 int *buf = (int *) cairo_image_surface_get_data(cs);
291 sscanf(color ? appData.blackPieceColor+1 : appData.whitePieceColor+1, "%x", &p); // replacement color
292 cairo_surface_flush(cs);
293 for(i=0; i<squareSize; i++) for(j=0; j<squareSize; j++) {
296 unsigned int c = buf[i*stride + j];
297 a = c >> 24; r = c >> 16 & 255; // alpha and red, where red is the 'white' weight, since white is #FFFFCC in the source images
298 f = (color ? a - r : r)/255.; // fraction of black or white in the mix that has to be replaced
299 buf[i*stride + j] = c & 0xFF000000; // alpha channel is kept at same opacity
300 buf[i*stride + j] += ((int)(f*(p&0xFF0000)) & 0xFF0000) + ((int)(f*(p&0xFF00)) & 0xFF00) + (int)(f*(p&0xFF)); // add desired fraction of new color
301 if(color) buf[i*stride + j] += r | r << 8 | r << 16; // details on black pieces get their weight added in pure white
303 cairo_surface_mark_dirty(cs);
312 for(p=0; pngPieceNames[p]; p++) {
313 ScaleOnePiece(pngPieceNames[p], 0, p);
314 ScaleOnePiece(pngPieceNames[p], 1, p);
320 { // [HGM] taken out of main
322 CreatePNGBoard(appData.liteBackTextureFile, 1);
323 CreatePNGBoard(appData.darkBackTextureFile, 0);
327 InitDrawingParams (int reloadPieces)
332 for(i=0; i<2; i++) for(p=0; p<BlackPawn+4; p++) {
333 if(pngPieceImages[i][p]) cairo_surface_destroy(pngPieceImages[i][p]);
334 pngPieceImages[i][p] = NULL;
339 // [HGM] seekgraph: some low-level drawing routines (by JC, mostly)
342 Color (char *col, int n)
345 sscanf(col, "#%x", &c);
351 SetPen (cairo_t *cr, float w, char *col, int dash)
353 static const double dotted[] = {4.0, 4.0};
354 static int len = sizeof(dotted) / sizeof(dotted[0]);
355 cairo_set_line_width (cr, w);
356 cairo_set_source_rgba (cr, Color(col, 4), Color(col, 2), Color(col, 0), 1.0);
357 if(dash) cairo_set_dash (cr, dotted, len, 0.0);
360 void DrawSeekAxis( int x, int y, int xTo, int yTo )
365 cr = cairo_create (csBoardWindow);
367 cairo_move_to (cr, x, y);
368 cairo_line_to(cr, xTo, yTo );
370 SetPen(cr, 2, "#000000", 0);
375 GraphExpose(currBoard, x-1, yTo-1, xTo-x+2, y-yTo+2);
378 void DrawSeekBackground( int left, int top, int right, int bottom )
380 cairo_t *cr = cairo_create (csBoardWindow);
382 cairo_rectangle (cr, left, top, right-left, bottom-top);
384 cairo_set_source_rgba(cr, 0.8, 0.8, 0.4,1.0);
389 GraphExpose(currBoard, left, top, right-left, bottom-top);
392 void DrawSeekText(char *buf, int x, int y)
394 cairo_t *cr = cairo_create (csBoardWindow);
396 cairo_select_font_face (cr, "Sans",
397 CAIRO_FONT_SLANT_NORMAL,
398 CAIRO_FONT_WEIGHT_NORMAL);
400 cairo_set_font_size (cr, 12.0);
402 cairo_move_to (cr, x, y+4);
403 cairo_set_source_rgba(cr, 0, 0, 0,1.0);
404 cairo_show_text( cr, buf);
408 GraphExpose(currBoard, x-5, y-10, 60, 15);
411 void DrawSeekDot(int x, int y, int colorNr)
413 cairo_t *cr = cairo_create (csBoardWindow);
414 int square = colorNr & 0x80;
418 cairo_rectangle (cr, x-squareSize/9, y-squareSize/9, 2*(squareSize/9), 2*(squareSize/9));
420 cairo_arc(cr, x, y, squareSize/9, 0.0, 2*M_PI);
422 SetPen(cr, 2, "#000000", 0);
423 cairo_stroke_preserve(cr);
425 case 0: cairo_set_source_rgba(cr, 1.0, 0, 0,1.0); break;
426 case 1: cairo_set_source_rgba (cr, 0.0, 0.7, 0.2, 1.0); break;
427 default: cairo_set_source_rgba (cr, 1.0, 1.0, 0.0, 1.0); break;
433 GraphExpose(currBoard, x-squareSize/8, y-squareSize/8, 2*(squareSize/8), 2*(squareSize/8));
437 InitDrawingHandle (Option *opt)
439 csBoardWindow = DRAWABLE(opt);
447 if (lineGap == 0) return;
449 /* [HR] Split this into 2 loops for non-square boards. */
451 for (i = 0; i < BOARD_HEIGHT + 1; i++) {
452 gridSegments[i].x1 = 0;
454 lineGap + BOARD_WIDTH * (squareSize + lineGap);
455 gridSegments[i].y1 = gridSegments[i].y2
456 = lineGap / 2 + (i * (squareSize + lineGap));
459 for (j = 0; j < BOARD_WIDTH + 1; j++) {
460 gridSegments[j + i].y1 = 0;
461 gridSegments[j + i].y2 =
462 lineGap + BOARD_HEIGHT * (squareSize + lineGap);
463 gridSegments[j + i].x1 = gridSegments[j + i].x2
464 = lineGap / 2 + (j * (squareSize + lineGap));
471 /* draws a grid starting around Nx, Ny squares starting at x,y */
476 cr = cairo_create (csBoardWindow);
478 cairo_set_antialias (cr, CAIRO_ANTIALIAS_NONE);
479 SetPen(cr, lineGap, "#000000", 0);
482 for (i = 0; i < BOARD_WIDTH + BOARD_HEIGHT + 2; i++)
484 cairo_move_to (cr, gridSegments[i].x1, gridSegments[i].y1);
485 cairo_line_to (cr, gridSegments[i].x2, gridSegments[i].y2);
496 DrawBorder (int x, int y, int type)
502 case 0: col = "#000000"; break;
503 case 1: col = appData.highlightSquareColor; break;
504 case 2: col = appData.premoveHighlightColor; break;
506 cr = cairo_create(csBoardWindow);
507 cairo_set_antialias(cr, CAIRO_ANTIALIAS_NONE);
508 cairo_rectangle(cr, x, y, squareSize+lineGap, squareSize+lineGap);
509 SetPen(cr, lineGap, col, 0);
512 GraphExpose(currBoard, x - lineGap/2, y - lineGap/2, squareSize+2*lineGap, squareSize+2*lineGap);
516 CutOutSquare (int x, int y, int *x0, int *y0, int kind)
518 int W = BOARD_WIDTH, H = BOARD_HEIGHT;
519 int nx = x/(squareSize + lineGap), ny = y/(squareSize + lineGap);
521 if(textureW[kind] < squareSize || textureH[kind] < squareSize) return 0;
522 if(textureW[kind] < W*squareSize)
523 *x0 = (textureW[kind] - squareSize) * nx/(W-1);
525 *x0 = textureW[kind]*nx / W + (textureW[kind] - W*squareSize) / (2*W);
526 if(textureH[kind] < H*squareSize)
527 *y0 = (textureH[kind] - squareSize) * ny/(H-1);
529 *y0 = textureH[kind]*ny / H + (textureH[kind] - H*squareSize) / (2*H);
534 DrawLogo (Option *opt, void *logo)
536 cairo_surface_t *img;
540 if(!logo || !opt) return;
541 img = cairo_image_surface_create_from_png (logo);
542 w = cairo_image_surface_get_width (img);
543 h = cairo_image_surface_get_height (img);
544 cr = cairo_create(DRAWABLE(opt));
545 cairo_scale(cr, (float)appData.logoSize/w, appData.logoSize/(2.*h));
546 cairo_set_source_surface (cr, img, 0, 0);
549 cairo_surface_destroy (img);
550 GraphExpose(opt, 0, 0, appData.logoSize, appData.logoSize/2);
554 BlankSquare (cairo_surface_t *dest, int x, int y, int color, ChessSquare piece, int fac)
555 { // [HGM] extra param 'fac' for forcing destination to (0,0) for copying to animation buffer
559 cr = cairo_create (dest);
561 if ((useTexture & color+1) && CutOutSquare(x, y, &x0, &y0, color)) {
562 cairo_set_source_surface (cr, pngBoardBitmap[color], x*fac - x0, y*fac - y0);
563 cairo_set_antialias (cr, CAIRO_ANTIALIAS_NONE);
564 cairo_rectangle (cr, x*fac, y*fac, squareSize, squareSize);
567 } else { // evenly colored squares
570 case 0: col = appData.darkSquareColor; break;
571 case 1: col = appData.lightSquareColor; break;
572 case 2: col = "#000000"; break;
574 SetPen(cr, 2.0, col, 0);
575 cairo_rectangle (cr, x, y, squareSize, squareSize);
582 pngDrawPiece (cairo_surface_t *dest, ChessSquare piece, int square_color, int x, int y)
587 if ((int)piece < (int) BlackPawn) {
593 if(appData.upsideDown && flipView) { p += p < BlackPawn ? BlackPawn : -BlackPawn; }// swap white and black pieces
594 BlankSquare(dest, x, y, square_color, piece, 1); // erase previous contents with background
595 cr = cairo_create (dest);
596 cairo_set_source_surface (cr, pngPieceBitmaps[kind][piece], x, y);
602 DoDrawDot (cairo_surface_t *cs, int marker, int x, int y, int r)
606 cr = cairo_create(cs);
607 cairo_arc(cr, x+r/2, y+r/2, r/2, 0.0, 2*M_PI);
608 if(appData.monoMode) {
609 SetPen(cr, 2, marker == 2 ? "#000000" : "#FFFFFF", 0);
610 cairo_stroke_preserve(cr);
611 SetPen(cr, 2, marker == 2 ? "#FFFFFF" : "#000000", 0);
613 SetPen(cr, 2, marker == 2 ? "#FF0000" : "#FFFF00", 0);
621 DrawDot (int marker, int x, int y, int r)
622 { // used for atomic captures; no need to draw on backup
623 DoDrawDot(csBoardWindow, marker, x, y, r);
627 DrawOneSquare (int x, int y, ChessSquare piece, int square_color, int marker, char *string, int align)
628 { // basic front-end board-draw function: takes care of everything that can be in square:
629 // piece, background, coordinate/count, marker dot
632 if (piece == EmptySquare) {
633 BlankSquare(csBoardWindow, x, y, square_color, piece, 1);
635 pngDrawPiece(csBoardWindow, piece, square_color, x, y);
638 if(align) { // square carries inscription (coord or piece count)
640 cairo_text_extents_t te;
642 cr = cairo_create (csBoardWindow);
643 cairo_select_font_face (cr, "Sans",
644 CAIRO_FONT_SLANT_NORMAL,
645 CAIRO_FONT_WEIGHT_BOLD);
647 cairo_set_font_size (cr, squareSize/4);
648 // calculate where it goes
649 cairo_text_extents (cr, string, &te);
652 xx += squareSize - te.width - te.x_bearing - 1;
653 yy += squareSize - te.height - te.y_bearing - 1;
654 } else if (align == 2) {
655 xx += te.x_bearing + 1, yy += -te.y_bearing + 1;
656 } else if (align == 3) {
657 xx += squareSize - te.width -te.x_bearing - 1;
658 yy += -te.y_bearing + 3;
659 } else if (align == 4) {
660 xx += te.x_bearing + 1, yy += -te.y_bearing + 3;
663 cairo_move_to (cr, xx-1, yy);
664 if(align < 3) cairo_set_source_rgb (cr, 0.0, 0.0, 0.0);
665 else cairo_set_source_rgb (cr, 1.0, 1.0, 1.0);
666 cairo_show_text (cr, string);
670 if(marker) { // print fat marker dot, if requested
671 DoDrawDot(csBoardWindow, marker, x + squareSize/4, y+squareSize/4, squareSize/2);
675 /**** Animation code by Hugh Fisher, DCS, ANU. ****/
677 /* Masks for XPM pieces. Black and white pieces can have
678 different shapes, but in the interest of retaining my
679 sanity pieces must have the same outline on both light
680 and dark squares, and all pieces must use the same
681 background square colors/images. */
683 static cairo_surface_t *c_animBufs[3*NrOfAnims]; // newBuf, saveBuf
686 InitAnimState (AnimNr anr)
688 if(c_animBufs[anr]) cairo_surface_destroy (c_animBufs[anr]);
689 if(c_animBufs[anr+2]) cairo_surface_destroy (c_animBufs[anr+2]);
690 c_animBufs[anr+4] = csBoardWindow;
691 c_animBufs[anr+2] = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, squareSize, squareSize);
692 c_animBufs[anr] = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, squareSize, squareSize);
699 InitAnimState(Player);
703 CairoOverlayPiece (ChessSquare piece, cairo_surface_t *dest)
705 static cairo_t *pieceSource;
706 pieceSource = cairo_create (dest);
707 cairo_set_source_surface (pieceSource, pngPieceBitmaps[!White(piece)][piece % BlackPawn], 0, 0);
708 if(doubleClick) cairo_paint_with_alpha (pieceSource, 0.6);
709 else cairo_paint(pieceSource);
710 cairo_destroy (pieceSource);
714 InsertPiece (AnimNr anr, ChessSquare piece)
716 CairoOverlayPiece(piece, c_animBufs[anr]);
720 DrawBlank (AnimNr anr, int x, int y, int startColor)
722 BlankSquare(c_animBufs[anr+2], x, y, startColor, EmptySquare, 0);
725 void CopyRectangle (AnimNr anr, int srcBuf, int destBuf,
726 int srcX, int srcY, int width, int height, int destX, int destY)
728 cairo_t *cr = cairo_create (c_animBufs[anr+destBuf]);
729 cairo_set_source_surface (cr, c_animBufs[anr+srcBuf], destX - srcX, destY - srcY);
730 cairo_rectangle (cr, destX, destY, width, height);
733 if(c_animBufs[anr+destBuf] == csBoardWindow)
734 GraphExpose(currBoard, destX, destY, squareSize, squareSize);
738 SetDragPiece (AnimNr anr, ChessSquare piece)
742 /* [AS] Arrow highlighting support */
745 DoDrawPolygon (cairo_surface_t *cs, Pnt arrow[], int nr)
749 cr = cairo_create (cs);
750 cairo_move_to (cr, arrow[nr-1].x, arrow[nr-1].y);
752 cairo_line_to(cr, arrow[i].x, arrow[i].y);
754 if(appData.monoMode) { // should we always outline arrow?
755 cairo_line_to(cr, arrow[0].x, arrow[0].y);
756 SetPen(cr, 2, "#000000", 0);
757 cairo_stroke_preserve(cr);
759 SetPen(cr, 2, appData.highlightSquareColor, 0);
767 DrawPolygon (Pnt arrow[], int nr)
769 DoDrawPolygon(csBoardWindow, arrow, nr);
770 // if(!dual) DoDrawPolygon(csBoardBackup, arrow, nr);