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;
113 static cairo_surface_t *csBoardWindow, *csBoardBackup, *csDualBoard;
114 static cairo_surface_t *pngPieceImages[2][(int)BlackPawn+4]; // png 256 x 256 images
115 static cairo_surface_t *pngPieceBitmaps[2][(int)BlackPawn]; // scaled pieces as used
116 static cairo_surface_t *pngPieceBitmaps2[2][(int)BlackPawn+4]; // scaled pieces in store
117 static cairo_surface_t *pngBoardBitmap[2];
118 int useTexture, textureW[2], textureH[2];
120 #define pieceToSolid(piece) &pieceBitmap[SOLID][(piece) % (int)BlackPawn]
121 #define pieceToOutline(piece) &pieceBitmap[OUTLINE][(piece) % (int)BlackPawn]
123 #define White(piece) ((int)(piece) < (int)BlackPawn)
127 } gridSegments[BOARD_RANKS + BOARD_FILES + 2];
134 cairo_surface_t *cstmp = csBoardWindow;
135 csBoardWindow = csDualBoard;
138 csBoardWindow = GetOutputSurface(&dualOptions[3], 0, 0);
147 // delete surfaces after size becomes invalid, so they will be recreated
148 if(csBoardWindow) cairo_surface_destroy(csBoardWindow);
149 if(csBoardBackup) cairo_surface_destroy(csBoardBackup);
150 if(csDualBoard) cairo_surface_destroy(csDualBoard);
151 csBoardWindow = csBoardBackup = csDualBoard = NULL;
154 #define BoardSize int
156 InitDrawingSizes (BoardSize boardSize, int flags)
157 { // [HGM] resize is functional now, but for board format changes only (nr of ranks, files)
158 int boardWidth, boardHeight;
160 static int oldWidth, oldHeight;
161 static VariantClass oldVariant;
162 static int oldMono = -1, oldTwoBoards = 0;
163 extern Widget formWidget;
165 if(!formWidget) return;
167 if(oldTwoBoards && !twoBoards) PopDown(DummyDlg);
168 oldTwoBoards = twoBoards;
170 if(appData.overrideLineGap >= 0) lineGap = appData.overrideLineGap;
171 boardWidth = lineGap + BOARD_WIDTH * (squareSize + lineGap);
172 boardHeight = lineGap + BOARD_HEIGHT * (squareSize + lineGap);
174 if(boardWidth != oldWidth || boardHeight != oldHeight) { // do resizing stuff only if size actually changed
176 oldWidth = boardWidth; oldHeight = boardHeight;
181 * Inhibit shell resizing.
183 ResizeBoardWindow(boardWidth, boardHeight, 0);
188 // [HGM] pieces: tailor piece bitmaps to needs of specific variant
191 if(gameInfo.variant != oldVariant) { // and only if variant changed
195 for(p=0; p<=(int)WhiteKing; p++)
196 pngPieceBitmaps[i][p] = pngPieceBitmaps2[i][p]; // defaults
197 if(gameInfo.variant == VariantShogi) {
198 pngPieceBitmaps[i][(int)WhiteCannon] = pngPieceBitmaps2[i][(int)WhiteKing+1];
199 pngPieceBitmaps[i][(int)WhiteNightrider] = pngPieceBitmaps2[i][(int)WhiteKing+2];
200 pngPieceBitmaps[i][(int)WhiteSilver] = pngPieceBitmaps2[i][(int)WhiteKing+3];
201 pngPieceBitmaps[i][(int)WhiteGrasshopper] = pngPieceBitmaps2[i][(int)WhiteKing+4];
202 pngPieceBitmaps[i][(int)WhiteQueen] = pngPieceBitmaps2[i][(int)WhiteLance];
205 if(gameInfo.variant == VariantGothic) {
206 pngPieceBitmaps[i][(int)WhiteMarshall] = pngPieceBitmaps2[i][(int)WhiteSilver];
209 if(gameInfo.variant == VariantSChess) {
210 pngPieceBitmaps[i][(int)WhiteAngel] = pngPieceBitmaps2[i][(int)WhiteFalcon];
211 pngPieceBitmaps[i][(int)WhiteMarshall] = pngPieceBitmaps2[i][(int)WhiteAlfil];
214 oldMono = -10; // kludge to force recreation of animation masks
215 oldVariant = gameInfo.variant;
218 oldMono = appData.monoMode;
222 CreatePNGBoard (char *s, int kind)
224 if(!appData.useBitmaps || s == NULL || *s == 0 || *s == '*') { useTexture &= ~(kind+1); return; }
225 if(strstr(s, ".png")) {
226 cairo_surface_t *img = cairo_image_surface_create_from_png (s);
228 useTexture |= kind + 1; pngBoardBitmap[kind] = img;
229 textureW[kind] = cairo_image_surface_get_width (img);
230 textureH[kind] = cairo_image_surface_get_height (img);
235 char *pngPieceNames[] = // must be in same order as internal piece encoding
236 { "Pawn", "Knight", "Bishop", "Rook", "Queen", "Advisor", "Elephant", "Archbishop", "Marshall", "Gold", "Commoner",
237 "Canon", "Nightrider", "CrownedBishop", "CrownedRook", "Princess", "Chancellor", "Hawk", "Lance", "Cobra", "Unicorn", "King",
238 "GoldKnight", "GoldLance", "GoldPawn", "GoldSilver", NULL
242 ConvertPixmap (int color, int piece)
244 int i, j, stride, f, colcode[10], w, b;
246 cairo_surface_t *res;
247 XpmPieces *p = builtInXpms + 10;
248 char **pixels = p->xpm[piece % BlackPawn][2*color];
250 sscanf(pixels[0], "%*d %*d %d", &f);
251 sscanf(appData.whitePieceColor+1, "%x", &w);
252 sscanf(appData.blackPieceColor+1, "%x", &b);
253 res = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, p->size, p->size);
254 stride = cairo_image_surface_get_stride(res);
255 buf = (int *) cairo_image_surface_get_data(res);
257 ch[i] = pixels[i+1][0];
259 if(strstr(pixels[i+1], "black")) colcode[i] = 0xFF000000; // 0xFF000000 + (color ? b : 0);
260 if(strstr(pixels[i+1], "white")) colcode[i] = 0xFFFFFFCC; // 0xFF000000 + w;
262 for(i=0; i<p->size; i++) {
263 for(j=0; j<p->size; j++) {
264 char c = pixels[i+f+1][j];
266 for(k=0; ch[k] != c && k < f; k++);
267 buf[i*p->size + j] = colcode[k];
270 cairo_surface_mark_dirty(res);
275 ScaleOnePiece (char *name, int color, int piece)
279 cairo_surface_t *img, *cs;
282 if((img = pngPieceImages[color][piece]) == NULL) { // if PNG file for this piece was not yet read, read it now and store it
283 if(!*appData.pngDirectory) img = ConvertPixmap(color, piece); else {
284 snprintf(buf, MSG_SIZ, "%s/%s%s.png", appData.pngDirectory, color ? "Black" : "White", pngPieceNames[piece]);
285 img = cairo_image_surface_create_from_png (buf);
286 if(cairo_surface_status(img) != CAIRO_STATUS_SUCCESS) img = ConvertPixmap(color, piece);
289 pngPieceImages[color][piece] = img;
290 // create new bitmap to hold scaled piece image (and remove any old)
291 if(pngPieceBitmaps2[color][piece]) cairo_surface_destroy (pngPieceBitmaps2[color][piece]);
292 pngPieceBitmaps2[color][piece] = cs = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, squareSize, squareSize);
293 if(piece <= WhiteKing) pngPieceBitmaps[color][piece] = cs;
294 // scaled copying of the raw png image
295 cr = cairo_create(cs);
296 w = cairo_image_surface_get_width (img);
297 h = cairo_image_surface_get_height (img);
298 cairo_scale(cr, squareSize/w, squareSize/h);
299 cairo_set_source_surface (cr, img, 0, 0);
302 { // operate on bitmap to color it (king-size hack...)
303 int stride = cairo_image_surface_get_stride(cs)/4;
304 int *buf = (int *) cairo_image_surface_get_data(cs);
306 sscanf(color ? appData.blackPieceColor+1 : appData.whitePieceColor+1, "%x", &p); // replacement color
307 cairo_surface_flush(cs);
308 for(i=0; i<squareSize; i++) for(j=0; j<squareSize; j++) {
311 unsigned int c = buf[i*stride + j];
312 a = c >> 24; r = c >> 16 & 255; // alpha and red, where red is the 'white' weight, since white is #FFFFCC in the source images
313 f = (color ? a - r : r)/255.; // fraction of black or white in the mix that has to be replaced
314 buf[i*stride + j] = c & 0xFF000000; // alpha channel is kept at same opacity
315 buf[i*stride + j] += ((int)(f*(p&0xFF0000)) & 0xFF0000) + ((int)(f*(p&0xFF00)) & 0xFF00) + (int)(f*(p&0xFF)); // add desired fraction of new color
316 if(color) buf[i*stride + j] += r | r << 8 | r << 16; // details on black pieces get their weight added in pure white
318 cairo_surface_mark_dirty(cs);
327 for(p=0; pngPieceNames[p]; p++) {
328 ScaleOnePiece(pngPieceNames[p], 0, p);
329 ScaleOnePiece(pngPieceNames[p], 1, p);
335 { // [HGM] taken out of main
337 CreatePNGBoard(appData.liteBackTextureFile, 1);
338 CreatePNGBoard(appData.darkBackTextureFile, 0);
342 InitDrawingParams (int reloadPieces)
347 for(i=0; i<2; i++) for(p=0; p<BlackPawn+4; p++) {
348 if(pngPieceImages[i][p]) cairo_surface_destroy(pngPieceImages[i][p]);
349 pngPieceImages[i][p] = NULL;
354 // [HGM] seekgraph: some low-level drawing routines (by JC, mostly)
357 Color (char *col, int n)
360 sscanf(col, "#%x", &c);
366 SetPen (cairo_t *cr, float w, char *col, int dash)
368 static const double dotted[] = {4.0, 4.0};
369 static int len = sizeof(dotted) / sizeof(dotted[0]);
370 cairo_set_line_width (cr, w);
371 cairo_set_source_rgba (cr, Color(col, 4), Color(col, 2), Color(col, 0), 1.0);
372 if(dash) cairo_set_dash (cr, dotted, len, 0.0);
375 void DrawSeekAxis( int x, int y, int xTo, int yTo )
380 cr = cairo_create (csBoardWindow);
382 cairo_move_to (cr, x, y);
383 cairo_line_to(cr, xTo, yTo );
385 SetPen(cr, 2, "#000000", 0);
392 void DrawSeekBackground( int left, int top, int right, int bottom )
394 cairo_t *cr = cairo_create (csBoardWindow);
396 cairo_rectangle (cr, left, top, right-left, bottom-top);
398 cairo_set_source_rgba(cr, 0.8, 0.8, 0.4,1.0);
405 void DrawSeekText(char *buf, int x, int y)
407 cairo_t *cr = cairo_create (csBoardWindow);
409 cairo_select_font_face (cr, "Sans",
410 CAIRO_FONT_SLANT_NORMAL,
411 CAIRO_FONT_WEIGHT_NORMAL);
413 cairo_set_font_size (cr, 12.0);
415 cairo_move_to (cr, x, y+4);
416 cairo_set_source_rgba(cr, 0, 0, 0,1.0);
417 cairo_show_text( cr, buf);
423 void DrawSeekDot(int x, int y, int colorNr)
425 cairo_t *cr = cairo_create (csBoardWindow);
426 int square = colorNr & 0x80;
430 cairo_rectangle (cr, x-squareSize/9, y-squareSize/9, 2*(squareSize/9), 2*(squareSize/9));
432 cairo_arc(cr, x, y, squareSize/9, 0.0, 2*M_PI);
434 SetPen(cr, 2, "#000000", 0);
435 cairo_stroke_preserve(cr);
437 case 0: cairo_set_source_rgba(cr, 1.0, 0, 0,1.0); break;
438 case 1: cairo_set_source_rgba (cr, 0.0, 0.7, 0.2, 1.0); break;
439 default: cairo_set_source_rgba (cr, 1.0, 1.0, 0.0, 1.0); break;
450 int boardWidth = lineGap + BOARD_WIDTH * (squareSize + lineGap);
451 int boardHeight = lineGap + BOARD_HEIGHT * (squareSize + lineGap);
453 csBoardWindow = GetOutputSurface(&mainOptions[W_BOARD], 0, 0);
454 csBoardBackup = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, boardWidth, boardHeight);
468 if (lineGap == 0) return;
470 /* [HR] Split this into 2 loops for non-square boards. */
472 for (i = 0; i < BOARD_HEIGHT + 1; i++) {
473 gridSegments[i].x1 = 0;
475 lineGap + BOARD_WIDTH * (squareSize + lineGap);
476 gridSegments[i].y1 = gridSegments[i].y2
477 = lineGap / 2 + (i * (squareSize + lineGap));
480 for (j = 0; j < BOARD_WIDTH + 1; j++) {
481 gridSegments[j + i].y1 = 0;
482 gridSegments[j + i].y2 =
483 lineGap + BOARD_HEIGHT * (squareSize + lineGap);
484 gridSegments[j + i].x1 = gridSegments[j + i].x2
485 = lineGap / 2 + (j * (squareSize + lineGap));
490 DoDrawGrid(cairo_surface_t *cs)
492 /* draws a grid starting around Nx, Ny squares starting at x,y */
498 cr = cairo_create (cs);
500 cairo_set_antialias (cr, CAIRO_ANTIALIAS_NONE);
501 SetPen(cr, lineGap, "#000000", 0);
504 for (i = 0; i < BOARD_WIDTH + BOARD_HEIGHT + 2; i++)
506 cairo_move_to (cr, gridSegments[i].x1, gridSegments[i].y1);
507 cairo_line_to (cr, gridSegments[i].x2, gridSegments[i].y2);
520 DoDrawGrid(csBoardWindow);
521 if(!dual) DoDrawGrid(csBoardBackup);
525 DoDrawBorder (cairo_surface_t *cs, int x, int y, int type)
532 case 0: col = "#000000"; break;
533 case 1: col = appData.highlightSquareColor; break;
534 case 2: col = appData.premoveHighlightColor; break;
536 cr = cairo_create(cs);
537 cairo_set_antialias(cr, CAIRO_ANTIALIAS_NONE);
538 cairo_rectangle(cr, x, y, squareSize+lineGap, squareSize+lineGap);
539 SetPen(cr, lineGap, col, 0);
544 DrawBorder (int x, int y, int type)
546 DoDrawBorder(csBoardWindow, x, y, type);
547 if(!dual) DoDrawBorder(csBoardBackup, x, y, type);
551 CutOutSquare (int x, int y, int *x0, int *y0, int kind)
553 int W = BOARD_WIDTH, H = BOARD_HEIGHT;
554 int nx = x/(squareSize + lineGap), ny = y/(squareSize + lineGap);
556 if(textureW[kind] < squareSize || textureH[kind] < squareSize) return 0;
557 if(textureW[kind] < W*squareSize)
558 *x0 = (textureW[kind] - squareSize) * nx/(W-1);
560 *x0 = textureW[kind]*nx / W + (textureW[kind] - W*squareSize) / (2*W);
561 if(textureH[kind] < H*squareSize)
562 *y0 = (textureH[kind] - squareSize) * ny/(H-1);
564 *y0 = textureH[kind]*ny / H + (textureH[kind] - H*squareSize) / (2*H);
569 DrawLogo (void *handle, void *logo)
571 cairo_surface_t *img, *cs;
575 if(!logo || !handle) return;
576 cs = GetOutputSurface(handle, appData.logoSize, appData.logoSize/2);
577 img = cairo_image_surface_create_from_png (logo);
578 w = cairo_image_surface_get_width (img);
579 h = cairo_image_surface_get_height (img);
580 cr = cairo_create(cs);
581 cairo_scale(cr, (float)appData.logoSize/w, appData.logoSize/(2.*h));
582 cairo_set_source_surface (cr, img, 0, 0);
585 cairo_surface_destroy (img);
586 cairo_surface_destroy (cs);
590 BlankSquare (cairo_surface_t *dest, int x, int y, int color, ChessSquare piece, int fac)
591 { // [HGM] extra param 'fac' for forcing destination to (0,0) for copying to animation buffer
595 cr = cairo_create (dest);
597 if ((useTexture & color+1) && CutOutSquare(x, y, &x0, &y0, color)) {
598 cairo_set_source_surface (cr, pngBoardBitmap[color], x*fac - x0, y*fac - y0);
599 cairo_set_antialias (cr, CAIRO_ANTIALIAS_NONE);
600 cairo_rectangle (cr, x*fac, y*fac, squareSize, squareSize);
603 } else { // evenly colored squares
606 case 0: col = appData.darkSquareColor; break;
607 case 1: col = appData.lightSquareColor; break;
608 case 2: col = "#000000"; break;
610 SetPen(cr, 2.0, col, 0);
611 cairo_rectangle (cr, x, y, squareSize, squareSize);
618 pngDrawPiece (cairo_surface_t *dest, ChessSquare piece, int square_color, int x, int y)
623 if ((int)piece < (int) BlackPawn) {
629 if(appData.upsideDown && flipView) { p += p < BlackPawn ? BlackPawn : -BlackPawn; }// swap white and black pieces
630 BlankSquare(dest, x, y, square_color, piece, 1); // erase previous contents with background
631 cr = cairo_create (dest);
632 cairo_set_source_surface (cr, pngPieceBitmaps[kind][piece], x, y);
638 DoDrawDot (cairo_surface_t *cs, int marker, int x, int y, int r)
642 cr = cairo_create(cs);
643 cairo_arc(cr, x+r/2, y+r/2, r/2, 0.0, 2*M_PI);
644 if(appData.monoMode) {
645 SetPen(cr, 2, marker == 2 ? "#000000" : "#FFFFFF", 0);
646 cairo_stroke_preserve(cr);
647 SetPen(cr, 2, marker == 2 ? "#FFFFFF" : "#000000", 0);
649 SetPen(cr, 2, marker == 2 ? "#FF0000" : "#FFFF00", 0);
657 DrawDot (int marker, int x, int y, int r)
658 { // used for atomic captures; no need to draw on backup
660 DoDrawDot(csBoardWindow, marker, x, y, r);
664 DoDrawOneSquare (cairo_surface_t *dest, int x, int y, ChessSquare piece, int square_color, int marker, char *string, int align)
665 { // basic front-end board-draw function: takes care of everything that can be in square:
666 // piece, background, coordinate/count, marker dot
669 if (piece == EmptySquare) {
670 BlankSquare(dest, x, y, square_color, piece, 1);
672 pngDrawPiece(dest, piece, square_color, x, y);
675 if(align) { // square carries inscription (coord or piece count)
677 cairo_text_extents_t te;
679 cr = cairo_create (dest);
680 cairo_select_font_face (cr, "Sans",
681 CAIRO_FONT_SLANT_NORMAL,
682 CAIRO_FONT_WEIGHT_BOLD);
684 cairo_set_font_size (cr, squareSize/4);
685 // calculate where it goes
686 cairo_text_extents (cr, string, &te);
689 xx += squareSize - te.width - te.x_bearing - 1;
690 yy += squareSize - te.height - te.y_bearing - 1;
691 } else if (align == 2) {
692 xx += te.x_bearing + 1, yy += -te.y_bearing + 1;
693 } else if (align == 3) {
694 xx += squareSize - te.width -te.x_bearing - 1;
695 yy += -te.y_bearing + 3;
696 } else if (align == 4) {
697 xx += te.x_bearing + 1, yy += -te.y_bearing + 3;
700 cairo_move_to (cr, xx-1, yy);
701 if(align < 3) cairo_set_source_rgb (cr, 0.0, 0.0, 0.0);
702 else cairo_set_source_rgb (cr, 1.0, 1.0, 1.0);
703 cairo_show_text (cr, string);
707 if(marker) { // print fat marker dot, if requested
708 DoDrawDot(dest, marker, x + squareSize/4, y+squareSize/4, squareSize/2);
713 DrawOneSquare (int x, int y, ChessSquare piece, int square_color, int marker, char *string, int align)
716 DoDrawOneSquare (csBoardWindow, x, y, piece, square_color, marker, string, align);
718 DoDrawOneSquare (csBoardBackup, x, y, piece, square_color, marker, string, align);
721 /**** Animation code by Hugh Fisher, DCS, ANU. ****/
723 /* Masks for XPM pieces. Black and white pieces can have
724 different shapes, but in the interest of retaining my
725 sanity pieces must have the same outline on both light
726 and dark squares, and all pieces must use the same
727 background square colors/images. */
729 static cairo_surface_t *c_animBufs[3*NrOfAnims]; // newBuf, saveBuf
732 InitAnimState (AnimNr anr)
734 DrawSeekOpen(); // set cs to board widget
735 if(c_animBufs[anr]) cairo_surface_destroy (c_animBufs[anr]);
736 if(c_animBufs[anr+2]) cairo_surface_destroy (c_animBufs[anr+2]);
737 c_animBufs[anr+4] = csBoardWindow;
738 c_animBufs[anr+2] = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, squareSize, squareSize);
739 c_animBufs[anr] = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, squareSize, squareSize);
746 InitAnimState(Player);
750 CairoOverlayPiece (ChessSquare piece, cairo_surface_t *dest)
752 static cairo_t *pieceSource;
753 pieceSource = cairo_create (dest);
754 cairo_set_source_surface (pieceSource, pngPieceBitmaps[!White(piece)][piece % BlackPawn], 0, 0);
755 if(doubleClick) cairo_paint_with_alpha (pieceSource, 0.6);
756 else cairo_paint(pieceSource);
757 cairo_destroy (pieceSource);
761 InsertPiece (AnimNr anr, ChessSquare piece)
763 CairoOverlayPiece(piece, c_animBufs[anr]);
767 DrawBlank (AnimNr anr, int x, int y, int startColor)
769 BlankSquare(c_animBufs[anr+2], x, y, startColor, EmptySquare, 0);
772 void CopyRectangle (AnimNr anr, int srcBuf, int destBuf,
773 int srcX, int srcY, int width, int height, int destX, int destY)
775 cairo_t *cr;// = cairo_create (c_animBufs[anr+destBuf]);
776 cr = cairo_create (c_animBufs[anr+destBuf]);
777 if(c_animBufs[anr+srcBuf] == csBoardWindow)
778 cairo_set_source_surface (cr, csBoardBackup, destX - srcX, destY - srcY);
780 cairo_set_source_surface (cr, c_animBufs[anr+srcBuf], destX - srcX, destY - srcY);
781 cairo_rectangle (cr, destX, destY, width, height);
784 if(c_animBufs[anr+destBuf] == csBoardWindow) {
785 cr = cairo_create (csBoardBackup); // also draw to backup
786 cairo_set_source_surface (cr, c_animBufs[anr+srcBuf], destX - srcX, destY - srcY);
787 cairo_rectangle (cr, destX, destY, width, height);
794 SetDragPiece (AnimNr anr, ChessSquare piece)
798 /* [AS] Arrow highlighting support */
801 DoDrawPolygon (cairo_surface_t *cs, Pnt arrow[], int nr)
805 cr = cairo_create (cs);
806 cairo_move_to (cr, arrow[nr-1].x, arrow[nr-1].y);
808 cairo_line_to(cr, arrow[i].x, arrow[i].y);
810 if(appData.monoMode) { // should we always outline arrow?
811 cairo_line_to(cr, arrow[0].x, arrow[0].y);
812 SetPen(cr, 2, "#000000", 0);
813 cairo_stroke_preserve(cr);
815 SetPen(cr, 2, appData.highlightSquareColor, 0);
823 DrawPolygon (Pnt arrow[], int nr)
825 DoDrawPolygon(csBoardWindow, arrow, nr);
826 if(!dual) DoDrawPolygon(csBoardBackup, arrow, nr);