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>
58 #include <librsvg/rsvg.h>
59 #include <librsvg/rsvg-cairo.h>
64 #else /* not STDC_HEADERS */
65 extern char *getenv();
68 # else /* not HAVE_STRING_H */
70 # endif /* not HAVE_STRING_H */
71 #endif /* not STDC_HEADERS */
78 // [HGM] bitmaps: put before incuding the bitmaps / pixmaps, to know how many piece types there are.
82 #include "pixmaps/pixmaps.h"
84 #include "bitmaps/bitmaps.h"
89 #include "xevalgraph.h"
101 #define usleep(t) _sleep2(((t)+500)/1000)
105 # define _(s) gettext (s)
106 # define N_(s) gettext_noop (s)
114 Boolean cairoAnimate;
116 cairo_surface_t *csBoardWindow;
117 static cairo_surface_t *pngPieceImages[2][(int)BlackPawn+4]; // png 256 x 256 images
118 static cairo_surface_t *pngPieceBitmaps[2][(int)BlackPawn]; // scaled pieces as used
119 static cairo_surface_t *pngPieceBitmaps2[2][(int)BlackPawn+4]; // scaled pieces in store
120 static cairo_surface_t *pngBoardBitmap[2];
121 int useTexture, textureW[2], textureH[2];
123 #define pieceToSolid(piece) &pieceBitmap[SOLID][(piece) % (int)BlackPawn]
124 #define pieceToOutline(piece) &pieceBitmap[OUTLINE][(piece) % (int)BlackPawn]
126 #define White(piece) ((int)(piece) < (int)BlackPawn)
130 } gridSegments[BOARD_RANKS + BOARD_FILES + 2];
138 currBoard = (dual ? &mainOptions[W_BOARD] : &dualOptions[3]);
139 csBoardWindow = DRAWABLE(currBoard);
142 #define BoardSize int
144 InitDrawingSizes (BoardSize boardSize, int flags)
145 { // [HGM] resize is functional now, but for board format changes only (nr of ranks, files)
146 int boardWidth, boardHeight;
148 static int oldWidth, oldHeight;
149 static VariantClass oldVariant;
150 static int oldMono = -1, oldTwoBoards = 0;
151 extern Widget formWidget;
153 if(!formWidget) return;
155 if(oldTwoBoards && !twoBoards) PopDown(DummyDlg);
156 oldTwoBoards = twoBoards;
158 if(appData.overrideLineGap >= 0) lineGap = appData.overrideLineGap;
159 boardWidth = lineGap + BOARD_WIDTH * (squareSize + lineGap);
160 boardHeight = lineGap + BOARD_HEIGHT * (squareSize + lineGap);
162 if(boardWidth != oldWidth || boardHeight != oldHeight) { // do resizing stuff only if size actually changed
164 oldWidth = boardWidth; oldHeight = boardHeight;
168 * Inhibit shell resizing.
170 ResizeBoardWindow(boardWidth, boardHeight, 0);
175 // [HGM] pieces: tailor piece bitmaps to needs of specific variant
178 if(gameInfo.variant != oldVariant) { // and only if variant changed
182 for(p=0; p<=(int)WhiteKing; p++)
183 pngPieceBitmaps[i][p] = pngPieceBitmaps2[i][p]; // defaults
184 if(gameInfo.variant == VariantShogi) {
185 pngPieceBitmaps[i][(int)WhiteCannon] = pngPieceBitmaps2[i][(int)WhiteKing+1];
186 pngPieceBitmaps[i][(int)WhiteNightrider] = pngPieceBitmaps2[i][(int)WhiteKing+2];
187 pngPieceBitmaps[i][(int)WhiteSilver] = pngPieceBitmaps2[i][(int)WhiteKing+3];
188 pngPieceBitmaps[i][(int)WhiteGrasshopper] = pngPieceBitmaps2[i][(int)WhiteKing+4];
189 pngPieceBitmaps[i][(int)WhiteQueen] = pngPieceBitmaps2[i][(int)WhiteLance];
192 if(gameInfo.variant == VariantGothic) {
193 pngPieceBitmaps[i][(int)WhiteMarshall] = pngPieceBitmaps2[i][(int)WhiteSilver];
196 if(gameInfo.variant == VariantSChess) {
197 pngPieceBitmaps[i][(int)WhiteAngel] = pngPieceBitmaps2[i][(int)WhiteFalcon];
198 pngPieceBitmaps[i][(int)WhiteMarshall] = pngPieceBitmaps2[i][(int)WhiteAlfil];
201 oldMono = -10; // kludge to force recreation of animation masks
202 oldVariant = gameInfo.variant;
205 oldMono = appData.monoMode;
209 CreatePNGBoard (char *s, int kind)
211 if(!appData.useBitmaps || s == NULL || *s == 0 || *s == '*') { useTexture &= ~(kind+1); return; }
212 if(strstr(s, ".png")) {
213 cairo_surface_t *img = cairo_image_surface_create_from_png (s);
215 useTexture |= kind + 1; pngBoardBitmap[kind] = img;
216 textureW[kind] = cairo_image_surface_get_width (img);
217 textureH[kind] = cairo_image_surface_get_height (img);
222 char *pngPieceNames[] = // must be in same order as internal piece encoding
223 { "Pawn", "Knight", "Bishop", "Rook", "Queen", "Advisor", "Elephant", "Archbishop", "Marshall", "Gold", "Commoner",
224 "Canon", "Nightrider", "CrownedBishop", "CrownedRook", "Princess", "Chancellor", "Hawk", "Lance", "Cobra", "Unicorn", "King",
225 "GoldKnight", "GoldLance", "GoldPawn", "GoldSilver", NULL
229 ConvertPixmap (int color, int piece)
231 int i, j, stride, f, colcode[10], w, b;
233 cairo_surface_t *res;
234 XpmPieces *p = builtInXpms + 10;
235 char **pixels = p->xpm[piece % BlackPawn][2*color];
237 sscanf(pixels[0], "%*d %*d %d", &f);
238 sscanf(appData.whitePieceColor+1, "%x", &w);
239 sscanf(appData.blackPieceColor+1, "%x", &b);
240 res = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, p->size, p->size);
241 stride = cairo_image_surface_get_stride(res);
242 buf = (int *) cairo_image_surface_get_data(res);
244 ch[i] = pixels[i+1][0];
246 if(strstr(pixels[i+1], "black")) colcode[i] = 0xFF000000; // 0xFF000000 + (color ? b : 0);
247 if(strstr(pixels[i+1], "white")) colcode[i] = 0xFFFFFFCC; // 0xFF000000 + w;
249 for(i=0; i<p->size; i++) {
250 for(j=0; j<p->size; j++) {
251 char c = pixels[i+f+1][j];
253 for(k=0; ch[k] != c && k < f; k++);
254 buf[i*p->size + j] = colcode[k];
257 cairo_surface_mark_dirty(res);
262 ScaleOnePiece (char *name, int color, int piece)
266 RsvgHandle *svg=NULL;
267 RsvgDimensionData svg_dimensions;
268 GError **svgerror=NULL;
269 cairo_surface_t *img, *cs;
274 if(*appData.svgDirectory) { // try to freshly render svg pieces first, always from file, to supply the source bitmap
275 snprintf(buf, MSG_SIZ, "%s/%s%s.svg", appData.svgDirectory, color ? "Black" : "White", pngPieceNames[piece]);
277 if(svg = rsvg_handle_new_from_file(buf,svgerror)) {
279 rsvg_handle_get_dimensions(svg, &svg_dimensions);
280 img = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, squareSize, squareSize);
282 cr = cairo_create(img);
283 cairo_scale(cr, squareSize/(double) svg_dimensions.width, squareSize/(double) svg_dimensions.height);
284 rsvg_handle_render_cairo(svg, cr);
285 if(cairo_surface_status(img) == CAIRO_STATUS_SUCCESS) {
286 if(pngPieceImages[color][piece]) cairo_surface_destroy(pngPieceImages[color][piece]);
287 pngPieceImages[color][piece] = img;
291 rsvg_handle_close (svg,NULL);
295 if((img = pngPieceImages[color][piece]) == NULL) { // if PNG file for this piece was not yet read, read it now and store it
296 if(!*appData.pngDirectory) img = ConvertPixmap(color, piece); else {
297 snprintf(buf, MSG_SIZ, "%s/%s%s.png", appData.pngDirectory, color ? "Black" : "White", pngPieceNames[piece]);
298 img = cairo_image_surface_create_from_png (buf);
299 if(cairo_surface_status(img) != CAIRO_STATUS_SUCCESS) img = ConvertPixmap(color, piece);
302 pngPieceImages[color][piece] = img;
305 // create new bitmap to hold scaled piece image (and remove any old)
306 if(pngPieceBitmaps2[color][piece]) cairo_surface_destroy (pngPieceBitmaps2[color][piece]);
307 pngPieceBitmaps2[color][piece] = cs = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, squareSize, squareSize);
308 if(piece <= WhiteKing) pngPieceBitmaps[color][piece] = cs;
310 // scaled copying of the raw png image
311 cr = cairo_create(cs);
312 w = cairo_image_surface_get_width (img);
313 h = cairo_image_surface_get_height (img);
314 cairo_scale(cr, squareSize/w, squareSize/h);
315 cairo_set_source_surface (cr, img, 0, 0);
319 if(!appData.trueColors || !*appData.pngDirectory && !appData.svgDirectory) { // operate on bitmap to color it (king-size hack...)
320 int stride = cairo_image_surface_get_stride(cs)/4;
321 int *buf = (int *) cairo_image_surface_get_data(cs);
323 sscanf(color ? appData.blackPieceColor+1 : appData.whitePieceColor+1, "%x", &p); // replacement color
324 cairo_surface_flush(cs);
325 for(i=0; i<squareSize; i++) for(j=0; j<squareSize; j++) {
328 unsigned int c = buf[i*stride + j];
329 a = c >> 24; r = c >> 16 & 255; // alpha and red, where red is the 'white' weight, since white is #FFFFCC in the source images
330 f = (color ? a - r : r)/255.; // fraction of black or white in the mix that has to be replaced
331 buf[i*stride + j] = c & 0xFF000000; // alpha channel is kept at same opacity
332 buf[i*stride + j] += ((int)(f*(p&0xFF0000)) & 0xFF0000) + ((int)(f*(p&0xFF00)) & 0xFF00) + (int)(f*(p&0xFF)); // add desired fraction of new color
333 if(color) buf[i*stride + j] += r | r << 8 | r << 16; // details on black pieces get their weight added in pure white
335 cairo_surface_mark_dirty(cs);
344 for(p=0; pngPieceNames[p]; p++) {
345 ScaleOnePiece(pngPieceNames[p], 0, p);
346 ScaleOnePiece(pngPieceNames[p], 1, p);
352 { // [HGM] taken out of main
354 CreatePNGBoard(appData.liteBackTextureFile, 1);
355 CreatePNGBoard(appData.darkBackTextureFile, 0);
359 InitDrawingParams (int reloadPieces)
364 for(i=0; i<2; i++) for(p=0; p<BlackPawn+4; p++) {
365 if(pngPieceImages[i][p]) cairo_surface_destroy(pngPieceImages[i][p]);
366 pngPieceImages[i][p] = NULL;
371 // [HGM] seekgraph: some low-level drawing routines (by JC, mostly)
374 Color (char *col, int n)
377 sscanf(col, "#%x", &c);
383 SetPen (cairo_t *cr, float w, char *col, int dash)
385 static const double dotted[] = {4.0, 4.0};
386 static int len = sizeof(dotted) / sizeof(dotted[0]);
387 cairo_set_line_width (cr, w);
388 cairo_set_source_rgba (cr, Color(col, 4), Color(col, 2), Color(col, 0), 1.0);
389 if(dash) cairo_set_dash (cr, dotted, len, 0.0);
392 void DrawSeekAxis( int x, int y, int xTo, int yTo )
397 cr = cairo_create (csBoardWindow);
399 cairo_move_to (cr, x, y);
400 cairo_line_to(cr, xTo, yTo );
402 SetPen(cr, 2, "#000000", 0);
407 GraphExpose(currBoard, x-1, yTo-1, xTo-x+2, y-yTo+2);
410 void DrawSeekBackground( int left, int top, int right, int bottom )
412 cairo_t *cr = cairo_create (csBoardWindow);
414 cairo_rectangle (cr, left, top, right-left, bottom-top);
416 cairo_set_source_rgba(cr, 0.8, 0.8, 0.4,1.0);
421 GraphExpose(currBoard, left, top, right-left, bottom-top);
424 void DrawSeekText(char *buf, int x, int y)
426 cairo_t *cr = cairo_create (csBoardWindow);
428 cairo_select_font_face (cr, "Sans",
429 CAIRO_FONT_SLANT_NORMAL,
430 CAIRO_FONT_WEIGHT_NORMAL);
432 cairo_set_font_size (cr, 12.0);
434 cairo_move_to (cr, x, y+4);
435 cairo_set_source_rgba(cr, 0, 0, 0,1.0);
436 cairo_show_text( cr, buf);
440 GraphExpose(currBoard, x-5, y-10, 60, 15);
443 void DrawSeekDot(int x, int y, int colorNr)
445 cairo_t *cr = cairo_create (csBoardWindow);
446 int square = colorNr & 0x80;
450 cairo_rectangle (cr, x-squareSize/9, y-squareSize/9, 2*(squareSize/9), 2*(squareSize/9));
452 cairo_arc(cr, x, y, squareSize/9, 0.0, 2*M_PI);
454 SetPen(cr, 2, "#000000", 0);
455 cairo_stroke_preserve(cr);
457 case 0: cairo_set_source_rgba(cr, 1.0, 0, 0,1.0); break;
458 case 1: cairo_set_source_rgba (cr, 0.0, 0.7, 0.2, 1.0); break;
459 default: cairo_set_source_rgba (cr, 1.0, 1.0, 0.0, 1.0); break;
465 GraphExpose(currBoard, x-squareSize/8, y-squareSize/8, 2*(squareSize/8), 2*(squareSize/8));
469 InitDrawingHandle (Option *opt)
471 csBoardWindow = DRAWABLE(opt);
479 if (lineGap == 0) return;
481 /* [HR] Split this into 2 loops for non-square boards. */
483 for (i = 0; i < BOARD_HEIGHT + 1; i++) {
484 gridSegments[i].x1 = 0;
486 lineGap + BOARD_WIDTH * (squareSize + lineGap);
487 gridSegments[i].y1 = gridSegments[i].y2
488 = lineGap / 2 + (i * (squareSize + lineGap));
491 for (j = 0; j < BOARD_WIDTH + 1; j++) {
492 gridSegments[j + i].y1 = 0;
493 gridSegments[j + i].y2 =
494 lineGap + BOARD_HEIGHT * (squareSize + lineGap);
495 gridSegments[j + i].x1 = gridSegments[j + i].x2
496 = lineGap / 2 + (j * (squareSize + lineGap));
503 /* draws a grid starting around Nx, Ny squares starting at x,y */
505 float odd = (lineGap & 1)/2.;
509 cr = cairo_create (csBoardWindow);
511 cairo_set_antialias (cr, CAIRO_ANTIALIAS_NONE);
512 SetPen(cr, lineGap, "#000000", 0);
515 for (i = 0; i < BOARD_WIDTH + BOARD_HEIGHT + 2; i++)
517 cairo_move_to (cr, gridSegments[i].x1 + odd, gridSegments[i].y1 + odd);
518 cairo_line_to (cr, gridSegments[i].x2 + odd, gridSegments[i].y2 + odd);
529 DrawBorder (int x, int y, int type, int odd)
535 case 0: col = "#000000"; break;
536 case 1: col = appData.highlightSquareColor; break;
537 case 2: col = appData.premoveHighlightColor; break;
539 cr = cairo_create(csBoardWindow);
540 cairo_set_antialias(cr, CAIRO_ANTIALIAS_NONE);
541 cairo_rectangle(cr, x+odd/2., y+odd/2., squareSize+lineGap, squareSize+lineGap);
542 SetPen(cr, lineGap, col, 0);
545 GraphExpose(currBoard, x - lineGap/2, y - lineGap/2, squareSize+2*lineGap+odd, squareSize+2*lineGap+odd);
549 CutOutSquare (int x, int y, int *x0, int *y0, int kind)
551 int W = BOARD_WIDTH, H = BOARD_HEIGHT;
552 int nx = x/(squareSize + lineGap), ny = y/(squareSize + lineGap);
554 if(textureW[kind] < squareSize || textureH[kind] < squareSize) return 0;
555 if(textureW[kind] < W*squareSize)
556 *x0 = (textureW[kind] - squareSize) * nx/(W-1);
558 *x0 = textureW[kind]*nx / W + (textureW[kind] - W*squareSize) / (2*W);
559 if(textureH[kind] < H*squareSize)
560 *y0 = (textureH[kind] - squareSize) * ny/(H-1);
562 *y0 = textureH[kind]*ny / H + (textureH[kind] - H*squareSize) / (2*H);
567 DrawLogo (Option *opt, void *logo)
569 cairo_surface_t *img;
573 if(!logo || !opt) return;
574 img = cairo_image_surface_create_from_png (logo);
575 w = cairo_image_surface_get_width (img);
576 h = cairo_image_surface_get_height (img);
577 cr = cairo_create(DRAWABLE(opt));
578 cairo_scale(cr, (float)appData.logoSize/w, appData.logoSize/(2.*h));
579 cairo_set_source_surface (cr, img, 0, 0);
582 cairo_surface_destroy (img);
583 GraphExpose(opt, 0, 0, appData.logoSize, appData.logoSize/2);
587 BlankSquare (cairo_surface_t *dest, int x, int y, int color, ChessSquare piece, int fac)
588 { // [HGM] extra param 'fac' for forcing destination to (0,0) for copying to animation buffer
592 cr = cairo_create (dest);
594 if ((useTexture & color+1) && CutOutSquare(x, y, &x0, &y0, color)) {
595 cairo_set_source_surface (cr, pngBoardBitmap[color], x*fac - x0, y*fac - y0);
596 cairo_set_antialias (cr, CAIRO_ANTIALIAS_NONE);
597 cairo_rectangle (cr, x*fac, y*fac, squareSize, squareSize);
600 } else { // evenly colored squares
603 case 0: col = appData.darkSquareColor; break;
604 case 1: col = appData.lightSquareColor; break;
605 case 2: col = "#000000"; break;
607 SetPen(cr, 2.0, col, 0);
608 cairo_rectangle (cr, x, y, squareSize, squareSize);
615 pngDrawPiece (cairo_surface_t *dest, ChessSquare piece, int square_color, int x, int y)
620 if ((int)piece < (int) BlackPawn) {
626 if(appData.upsideDown && flipView) { p += p < BlackPawn ? BlackPawn : -BlackPawn; }// swap white and black pieces
627 BlankSquare(dest, x, y, square_color, piece, 1); // erase previous contents with background
628 cr = cairo_create (dest);
629 cairo_set_source_surface (cr, pngPieceBitmaps[kind][piece], x, y);
635 DoDrawDot (cairo_surface_t *cs, int marker, int x, int y, int r)
639 cr = cairo_create(cs);
640 cairo_arc(cr, x+r/2, y+r/2, r/2, 0.0, 2*M_PI);
641 if(appData.monoMode) {
642 SetPen(cr, 2, marker == 2 ? "#000000" : "#FFFFFF", 0);
643 cairo_stroke_preserve(cr);
644 SetPen(cr, 2, marker == 2 ? "#FFFFFF" : "#000000", 0);
646 SetPen(cr, 2, marker == 2 ? "#FF0000" : "#FFFF00", 0);
654 DrawDot (int marker, int x, int y, int r)
655 { // used for atomic captures; no need to draw on backup
656 DoDrawDot(csBoardWindow, marker, x, y, r);
660 DrawOneSquare (int x, int y, ChessSquare piece, int square_color, int marker, char *string, int align)
661 { // basic front-end board-draw function: takes care of everything that can be in square:
662 // piece, background, coordinate/count, marker dot
665 if (piece == EmptySquare) {
666 BlankSquare(csBoardWindow, x, y, square_color, piece, 1);
668 pngDrawPiece(csBoardWindow, piece, square_color, x, y);
671 if(align) { // square carries inscription (coord or piece count)
673 cairo_text_extents_t te;
675 cr = cairo_create (csBoardWindow);
676 cairo_select_font_face (cr, "Sans",
677 CAIRO_FONT_SLANT_NORMAL,
678 CAIRO_FONT_WEIGHT_BOLD);
680 cairo_set_font_size (cr, squareSize/4);
681 // calculate where it goes
682 cairo_text_extents (cr, string, &te);
685 xx += squareSize - te.width - te.x_bearing - 1;
686 yy += squareSize - te.height - te.y_bearing - 1;
687 } else if (align == 2) {
688 xx += te.x_bearing + 1, yy += -te.y_bearing + 1;
689 } else if (align == 3) {
690 xx += squareSize - te.width -te.x_bearing - 1;
691 yy += -te.y_bearing + 3;
692 } else if (align == 4) {
693 xx += te.x_bearing + 1, yy += -te.y_bearing + 3;
696 cairo_move_to (cr, xx-1, yy);
697 if(align < 3) cairo_set_source_rgb (cr, 0.0, 0.0, 0.0);
698 else cairo_set_source_rgb (cr, 1.0, 1.0, 1.0);
699 cairo_show_text (cr, string);
703 if(marker) { // print fat marker dot, if requested
704 DoDrawDot(csBoardWindow, marker, x + squareSize/4, y+squareSize/4, squareSize/2);
708 /**** Animation code by Hugh Fisher, DCS, ANU. ****/
710 /* Masks for XPM pieces. Black and white pieces can have
711 different shapes, but in the interest of retaining my
712 sanity pieces must have the same outline on both light
713 and dark squares, and all pieces must use the same
714 background square colors/images. */
716 static cairo_surface_t *c_animBufs[3*NrOfAnims]; // newBuf, saveBuf
719 InitAnimState (AnimNr anr)
721 if(c_animBufs[anr]) cairo_surface_destroy (c_animBufs[anr]);
722 if(c_animBufs[anr+2]) cairo_surface_destroy (c_animBufs[anr+2]);
723 c_animBufs[anr+4] = csBoardWindow;
724 c_animBufs[anr+2] = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, squareSize, squareSize);
725 c_animBufs[anr] = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, squareSize, squareSize);
732 InitAnimState(Player);
736 CairoOverlayPiece (ChessSquare piece, cairo_surface_t *dest)
738 static cairo_t *pieceSource;
739 pieceSource = cairo_create (dest);
740 cairo_set_source_surface (pieceSource, pngPieceBitmaps[!White(piece)][piece % BlackPawn], 0, 0);
741 if(doubleClick) cairo_paint_with_alpha (pieceSource, 0.6);
742 else cairo_paint(pieceSource);
743 cairo_destroy (pieceSource);
747 InsertPiece (AnimNr anr, ChessSquare piece)
749 CairoOverlayPiece(piece, c_animBufs[anr]);
753 DrawBlank (AnimNr anr, int x, int y, int startColor)
755 BlankSquare(c_animBufs[anr+2], x, y, startColor, EmptySquare, 0);
758 void CopyRectangle (AnimNr anr, int srcBuf, int destBuf,
759 int srcX, int srcY, int width, int height, int destX, int destY)
761 cairo_t *cr = cairo_create (c_animBufs[anr+destBuf]);
762 cairo_set_source_surface (cr, c_animBufs[anr+srcBuf], destX - srcX, destY - srcY);
763 cairo_rectangle (cr, destX, destY, width, height);
766 if(c_animBufs[anr+destBuf] == csBoardWindow)
767 GraphExpose(currBoard, destX, destY, squareSize, squareSize);
771 SetDragPiece (AnimNr anr, ChessSquare piece)
775 /* [AS] Arrow highlighting support */
778 DoDrawPolygon (cairo_surface_t *cs, Pnt arrow[], int nr)
782 cr = cairo_create (cs);
783 cairo_move_to (cr, arrow[nr-1].x, arrow[nr-1].y);
785 cairo_line_to(cr, arrow[i].x, arrow[i].y);
787 if(appData.monoMode) { // should we always outline arrow?
788 cairo_line_to(cr, arrow[0].x, arrow[0].y);
789 SetPen(cr, 2, "#000000", 0);
790 cairo_stroke_preserve(cr);
792 SetPen(cr, 2, appData.highlightSquareColor, 0);
800 DrawPolygon (Pnt arrow[], int nr)
802 DoDrawPolygon(csBoardWindow, arrow, nr);
803 // if(!dual) DoDrawPolygon(csBoardBackup, arrow, nr);