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.
83 #include "xevalgraph.h"
95 #define usleep(t) _sleep2(((t)+500)/1000)
99 # define _(s) gettext (s)
100 # define N_(s) gettext_noop (s)
108 Boolean cairoAnimate;
110 cairo_surface_t *csBoardWindow;
111 static cairo_surface_t *pngPieceImages[2][(int)BlackPawn+4]; // png 256 x 256 images
112 static cairo_surface_t *pngPieceBitmaps[2][(int)BlackPawn]; // scaled pieces as used
113 static cairo_surface_t *pngPieceBitmaps2[2][(int)BlackPawn+4]; // scaled pieces in store
114 static RsvgHandle *svgPieces[2][(int)BlackPawn+4]; // vector pieces in store
115 static cairo_surface_t *pngBoardBitmap[2];
116 int useTexture, textureW[2], textureH[2];
118 #define pieceToSolid(piece) &pieceBitmap[SOLID][(piece) % (int)BlackPawn]
119 #define pieceToOutline(piece) &pieceBitmap[OUTLINE][(piece) % (int)BlackPawn]
121 #define White(piece) ((int)(piece) < (int)BlackPawn)
125 } gridSegments[BOARD_RANKS + BOARD_FILES + 2];
133 currBoard = (dual ? &mainOptions[W_BOARD] : &dualOptions[3]);
134 csBoardWindow = DRAWABLE(currBoard);
138 SelectPieces(VariantClass v)
143 for(p=0; p<=(int)WhiteKing; p++)
144 pngPieceBitmaps[i][p] = pngPieceBitmaps2[i][p]; // defaults
145 if(v == VariantShogi) {
146 pngPieceBitmaps[i][(int)WhiteCannon] = pngPieceBitmaps2[i][(int)WhiteKing+1];
147 pngPieceBitmaps[i][(int)WhiteNightrider] = pngPieceBitmaps2[i][(int)WhiteKing+2];
148 pngPieceBitmaps[i][(int)WhiteSilver] = pngPieceBitmaps2[i][(int)WhiteKing+3];
149 pngPieceBitmaps[i][(int)WhiteGrasshopper] = pngPieceBitmaps2[i][(int)WhiteKing+4];
150 pngPieceBitmaps[i][(int)WhiteQueen] = pngPieceBitmaps2[i][(int)WhiteLance];
153 if(v == VariantGothic) {
154 pngPieceBitmaps[i][(int)WhiteMarshall] = pngPieceBitmaps2[i][(int)WhiteSilver];
157 if(v == VariantSChess) {
158 pngPieceBitmaps[i][(int)WhiteAngel] = pngPieceBitmaps2[i][(int)WhiteFalcon];
159 pngPieceBitmaps[i][(int)WhiteMarshall] = pngPieceBitmaps2[i][(int)WhiteAlfil];
164 #define BoardSize int
166 InitDrawingSizes (BoardSize boardSize, int flags)
167 { // [HGM] resize is functional now, but for board format changes only (nr of ranks, files)
168 int boardWidth, boardHeight;
170 static int oldWidth, oldHeight;
171 static VariantClass oldVariant;
172 static int oldMono = -1, oldTwoBoards = 0;
173 extern Widget formWidget;
175 if(!formWidget) return;
177 if(oldTwoBoards && !twoBoards) PopDown(DummyDlg);
178 oldTwoBoards = twoBoards;
180 if(appData.overrideLineGap >= 0) lineGap = appData.overrideLineGap;
181 boardWidth = lineGap + BOARD_WIDTH * (squareSize + lineGap);
182 boardHeight = lineGap + BOARD_HEIGHT * (squareSize + lineGap);
184 if(boardWidth != oldWidth || boardHeight != oldHeight) { // do resizing stuff only if size actually changed
186 oldWidth = boardWidth; oldHeight = boardHeight;
190 * Inhibit shell resizing.
192 ResizeBoardWindow(boardWidth, boardHeight, 0);
197 // [HGM] pieces: tailor piece bitmaps to needs of specific variant
200 if(gameInfo.variant != oldVariant) { // and only if variant changed
202 SelectPieces(gameInfo.variant);
204 oldMono = -10; // kludge to force recreation of animation masks
205 oldVariant = gameInfo.variant;
208 oldMono = appData.monoMode;
212 ExposeRedraw (Option *graph, int x, int y, int w, int h)
213 { // copy a selected part of the buffer bitmap to the display
214 cairo_t *cr = cairo_create((cairo_surface_t *) graph->textValue);
215 cairo_set_source_surface(cr, (cairo_surface_t *) graph->choice, 0, 0);
216 cairo_set_antialias(cr, CAIRO_ANTIALIAS_NONE);
217 cairo_rectangle(cr, x, y, w, h);
223 CreatePNGBoard (char *s, int kind)
225 if(!appData.useBitmaps || s == NULL || *s == 0 || *s == '*') { useTexture &= ~(kind+1); return; }
226 if(strstr(s, ".png")) {
227 cairo_surface_t *img = cairo_image_surface_create_from_png (s);
229 useTexture |= kind + 1; pngBoardBitmap[kind] = img;
230 textureW[kind] = cairo_image_surface_get_width (img);
231 textureH[kind] = cairo_image_surface_get_height (img);
236 char *pngPieceNames[] = // must be in same order as internal piece encoding
237 { "Pawn", "Knight", "Bishop", "Rook", "Queen", "Advisor", "Elephant", "Archbishop", "Marshall", "Gold", "Commoner",
238 "Canon", "Nightrider", "CrownedBishop", "CrownedRook", "Princess", "Chancellor", "Hawk", "Lance", "Cobra", "Unicorn", "King",
239 "GoldKnight", "GoldLance", "GoldPawn", "GoldSilver", NULL
243 LoadSVG (char *dir, int color, int piece)
246 RsvgHandle *svg=svgPieces[color][piece];
247 RsvgDimensionData svg_dimensions;
248 GError **svgerror=NULL;
249 cairo_surface_t *img;
252 snprintf(buf, MSG_SIZ, "%s/%s%s.svg", dir, color ? "Black" : "White", pngPieceNames[piece]);
254 if(svg || *dir && (svg = rsvg_handle_new_from_file(buf, svgerror))) {
256 rsvg_handle_get_dimensions(svg, &svg_dimensions);
257 img = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, squareSize, squareSize);
259 cr = cairo_create(img);
260 cairo_scale(cr, squareSize/(double) svg_dimensions.width, squareSize/(double) svg_dimensions.height);
261 rsvg_handle_render_cairo(svg, cr);
262 if(cairo_surface_status(img) == CAIRO_STATUS_SUCCESS) {
263 if(pngPieceImages[color][piece]) cairo_surface_destroy(pngPieceImages[color][piece]);
264 pngPieceImages[color][piece] = img;
274 ScaleOnePiece (int color, int piece)
278 cairo_surface_t *img, *cs;
283 if(!svgPieces[color][piece]) { // try to freshly render cached svg pieces first, to supply the source bitmap
284 svgPieces[color][piece] = LoadSVG("", color, piece); // this fills pngPieceImages if we had cached svg with bitmap of wanted size
287 if(!pngPieceImages[color][piece]) { // we don't have cached bitmap (implying we did not have cached svg)
288 if(*appData.pieceDirectory) { // user specified piece directory
289 snprintf(buf, MSG_SIZ, "%s/%s%s.png", appData.pieceDirectory, color ? "Black" : "White", pngPieceNames[piece]);
290 pngPieceImages[color][piece] = img = cairo_image_surface_create_from_png (buf); // try if there are png pieces there
291 if(cairo_surface_status(img) != CAIRO_STATUS_SUCCESS) { // there were not
292 svgPieces[color][piece] = LoadSVG(appData.pieceDirectory, color, piece); // so try if he has svg there
297 if(!pngPieceImages[color][piece]) { // we still did not manage to acquire a piece bitmap
298 static int warned = 0;
299 if(!(svgPieces[color][piece] = LoadSVG(SVGDIR, color, piece)) && !warned) { // try to fall back on installed svg
300 char *msg = _("No default pieces installed\nSelect your own -pieceImageDirectory");
301 printf("%s\n", msg); // give up
302 DisplayError(msg, 0);
303 warned = 1; // prevent error message being repeated for each piece type
307 img = pngPieceImages[color][piece];
309 // create new bitmap to hold scaled piece image (and remove any old)
310 if(pngPieceBitmaps2[color][piece]) cairo_surface_destroy (pngPieceBitmaps2[color][piece]);
311 pngPieceBitmaps2[color][piece] = cs = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, squareSize, squareSize);
315 // scaled copying of the raw png image
316 cr = cairo_create(cs);
317 w = cairo_image_surface_get_width (img);
318 h = cairo_image_surface_get_height (img);
319 cairo_scale(cr, squareSize/w, squareSize/h);
320 cairo_set_source_surface (cr, img, 0, 0);
324 if(!appData.trueColors || !*appData.pieceDirectory) { // operate on bitmap to color it (king-size hack...)
325 int stride = cairo_image_surface_get_stride(cs)/4;
326 int *buf = (int *) cairo_image_surface_get_data(cs);
328 sscanf(color ? appData.blackPieceColor+1 : appData.whitePieceColor+1, "%x", &p); // replacement color
329 cairo_surface_flush(cs);
330 for(i=0; i<squareSize; i++) for(j=0; j<squareSize; j++) {
333 unsigned int c = buf[i*stride + j];
334 a = c >> 24; r = c >> 16 & 255; // alpha and red, where red is the 'white' weight, since white is #FFFFCC in the source images
335 f = (color ? a - r : r)/255.; // fraction of black or white in the mix that has to be replaced
336 buf[i*stride + j] = c & 0xFF000000; // alpha channel is kept at same opacity
337 buf[i*stride + j] += ((int)(f*(p&0xFF0000)) & 0xFF0000) + ((int)(f*(p&0xFF00)) & 0xFF00) + (int)(f*(p&0xFF)); // add desired fraction of new color
338 if(color) buf[i*stride + j] += r | r << 8 | r << 16; // details on black pieces get their weight added in pure white
339 if(appData.monoMode) {
340 if(a < 64) buf[i*stride + j] = 0; // if not opaque enough, totally transparent
341 else if(2*r < a) buf[i*stride + j] = 0xFF000000; // if not light enough, totally black
342 else buf[i*stride + j] = 0xFFFFFFFF; // otherwise white
345 cairo_surface_mark_dirty(cs);
354 for(p=0; pngPieceNames[p]; p++) {
358 SelectPieces(gameInfo.variant);
363 { // [HGM] taken out of main
365 CreatePNGBoard(appData.liteBackTextureFile, 1);
366 CreatePNGBoard(appData.darkBackTextureFile, 0);
370 InitDrawingParams (int reloadPieces)
374 for(i=0; i<2; i++) for(p=0; p<BlackPawn+4; p++) {
375 if(pngPieceImages[i][p]) cairo_surface_destroy(pngPieceImages[i][p]);
376 pngPieceImages[i][p] = NULL;
377 if(svgPieces[i][p]) rsvg_handle_close(svgPieces[i][p], NULL);
378 svgPieces[i][p] = NULL;
383 // [HGM] seekgraph: some low-level drawing routines (by JC, mostly)
386 Color (char *col, int n)
389 sscanf(col, "#%x", &c);
395 SetPen (cairo_t *cr, float w, char *col, int dash)
397 static const double dotted[] = {4.0, 4.0};
398 static int len = sizeof(dotted) / sizeof(dotted[0]);
399 cairo_set_line_width (cr, w);
400 cairo_set_source_rgba (cr, Color(col, 4), Color(col, 2), Color(col, 0), 1.0);
401 if(dash) cairo_set_dash (cr, dotted, len, 0.0);
404 void DrawSeekAxis( int x, int y, int xTo, int yTo )
409 cr = cairo_create (csBoardWindow);
411 cairo_move_to (cr, x, y);
412 cairo_line_to(cr, xTo, yTo );
414 SetPen(cr, 2, "#000000", 0);
419 GraphExpose(currBoard, x-1, yTo-1, xTo-x+2, y-yTo+2);
422 void DrawSeekBackground( int left, int top, int right, int bottom )
424 cairo_t *cr = cairo_create (csBoardWindow);
426 cairo_rectangle (cr, left, top, right-left, bottom-top);
428 cairo_set_source_rgba(cr, 0.8, 0.8, 0.4,1.0);
433 GraphExpose(currBoard, left, top, right-left, bottom-top);
436 void DrawSeekText(char *buf, int x, int y)
438 cairo_t *cr = cairo_create (csBoardWindow);
440 cairo_select_font_face (cr, "Sans",
441 CAIRO_FONT_SLANT_NORMAL,
442 CAIRO_FONT_WEIGHT_NORMAL);
444 cairo_set_font_size (cr, 12.0);
446 cairo_move_to (cr, x, y+4);
447 cairo_set_source_rgba(cr, 0, 0, 0,1.0);
448 cairo_show_text( cr, buf);
452 GraphExpose(currBoard, x-5, y-10, 60, 15);
455 void DrawSeekDot(int x, int y, int colorNr)
457 cairo_t *cr = cairo_create (csBoardWindow);
458 int square = colorNr & 0x80;
462 cairo_rectangle (cr, x-squareSize/9, y-squareSize/9, 2*(squareSize/9), 2*(squareSize/9));
464 cairo_arc(cr, x, y, squareSize/9, 0.0, 2*M_PI);
466 SetPen(cr, 2, "#000000", 0);
467 cairo_stroke_preserve(cr);
469 case 0: cairo_set_source_rgba(cr, 1.0, 0, 0,1.0); break;
470 case 1: cairo_set_source_rgba (cr, 0.0, 0.7, 0.2, 1.0); break;
471 default: cairo_set_source_rgba (cr, 1.0, 1.0, 0.0, 1.0); break;
477 GraphExpose(currBoard, x-squareSize/8, y-squareSize/8, 2*(squareSize/8), 2*(squareSize/8));
481 InitDrawingHandle (Option *opt)
483 csBoardWindow = DRAWABLE(opt);
491 if (lineGap == 0) return;
493 /* [HR] Split this into 2 loops for non-square boards. */
495 for (i = 0; i < BOARD_HEIGHT + 1; i++) {
496 gridSegments[i].x1 = 0;
498 lineGap + BOARD_WIDTH * (squareSize + lineGap);
499 gridSegments[i].y1 = gridSegments[i].y2
500 = lineGap / 2 + (i * (squareSize + lineGap));
503 for (j = 0; j < BOARD_WIDTH + 1; j++) {
504 gridSegments[j + i].y1 = 0;
505 gridSegments[j + i].y2 =
506 lineGap + BOARD_HEIGHT * (squareSize + lineGap);
507 gridSegments[j + i].x1 = gridSegments[j + i].x2
508 = lineGap / 2 + (j * (squareSize + lineGap));
515 /* draws a grid starting around Nx, Ny squares starting at x,y */
517 float odd = (lineGap & 1)/2.;
521 cr = cairo_create (csBoardWindow);
523 cairo_set_antialias (cr, CAIRO_ANTIALIAS_NONE);
524 SetPen(cr, lineGap, "#000000", 0);
527 for (i = 0; i < BOARD_WIDTH + BOARD_HEIGHT + 2; i++)
529 int h = (gridSegments[i].y1 == gridSegments[i].y2); // horizontal
530 cairo_move_to (cr, gridSegments[i].x1 + !h*odd, gridSegments[i].y1 + h*odd);
531 cairo_line_to (cr, gridSegments[i].x2 + !h*odd, gridSegments[i].y2 + h*odd);
542 DrawBorder (int x, int y, int type, int odd)
548 case 0: col = "#000000"; break;
549 case 1: col = appData.highlightSquareColor; break;
550 case 2: col = appData.premoveHighlightColor; break;
552 cr = cairo_create(csBoardWindow);
553 cairo_set_antialias(cr, CAIRO_ANTIALIAS_NONE);
554 cairo_rectangle(cr, x+odd/2., y+odd/2., squareSize+lineGap, squareSize+lineGap);
555 SetPen(cr, lineGap, col, 0);
558 GraphExpose(currBoard, x - lineGap/2, y - lineGap/2, squareSize+2*lineGap+odd, squareSize+2*lineGap+odd);
562 CutOutSquare (int x, int y, int *x0, int *y0, int kind)
564 int W = BOARD_WIDTH, H = BOARD_HEIGHT;
565 int nx = x/(squareSize + lineGap), ny = y/(squareSize + lineGap);
567 if(textureW[kind] < squareSize || textureH[kind] < squareSize) return 0;
568 if(textureW[kind] < W*squareSize)
569 *x0 = (textureW[kind] - squareSize) * nx/(W-1);
571 *x0 = textureW[kind]*nx / W + (textureW[kind] - W*squareSize) / (2*W);
572 if(textureH[kind] < H*squareSize)
573 *y0 = (textureH[kind] - squareSize) * ny/(H-1);
575 *y0 = textureH[kind]*ny / H + (textureH[kind] - H*squareSize) / (2*H);
580 DrawLogo (Option *opt, void *logo)
582 cairo_surface_t *img;
586 if(!logo || !opt) return;
587 img = cairo_image_surface_create_from_png (logo);
588 w = cairo_image_surface_get_width (img);
589 h = cairo_image_surface_get_height (img);
590 cr = cairo_create(DRAWABLE(opt));
591 cairo_scale(cr, (float)appData.logoSize/w, appData.logoSize/(2.*h));
592 cairo_set_source_surface (cr, img, 0, 0);
595 cairo_surface_destroy (img);
596 GraphExpose(opt, 0, 0, appData.logoSize, appData.logoSize/2);
600 BlankSquare (cairo_surface_t *dest, int x, int y, int color, ChessSquare piece, int fac)
601 { // [HGM] extra param 'fac' for forcing destination to (0,0) for copying to animation buffer
605 cr = cairo_create (dest);
607 if ((useTexture & color+1) && CutOutSquare(x, y, &x0, &y0, color)) {
608 cairo_set_source_surface (cr, pngBoardBitmap[color], x*fac - x0, y*fac - y0);
609 cairo_set_antialias (cr, CAIRO_ANTIALIAS_NONE);
610 cairo_rectangle (cr, x*fac, y*fac, squareSize, squareSize);
613 } else { // evenly colored squares
616 case 0: col = appData.darkSquareColor; break;
617 case 1: col = appData.lightSquareColor; break;
618 case 2: col = "#000000"; break;
620 SetPen(cr, 2.0, col, 0);
621 cairo_rectangle (cr, fac*x, fac*y, squareSize, squareSize);
622 cairo_set_antialias (cr, CAIRO_ANTIALIAS_NONE);
629 pngDrawPiece (cairo_surface_t *dest, ChessSquare piece, int square_color, int x, int y)
634 if ((int)piece < (int) BlackPawn) {
640 if(appData.upsideDown && flipView) { p += p < BlackPawn ? BlackPawn : -BlackPawn; }// swap white and black pieces
641 BlankSquare(dest, x, y, square_color, piece, 1); // erase previous contents with background
642 cr = cairo_create (dest);
643 cairo_set_source_surface (cr, pngPieceBitmaps[kind][piece], x, y);
649 DoDrawDot (cairo_surface_t *cs, int marker, int x, int y, int r)
653 cr = cairo_create(cs);
654 cairo_arc(cr, x+r/2, y+r/2, r/2, 0.0, 2*M_PI);
655 if(appData.monoMode) {
656 SetPen(cr, 2, marker == 2 ? "#000000" : "#FFFFFF", 0);
657 cairo_stroke_preserve(cr);
658 SetPen(cr, 2, marker == 2 ? "#FFFFFF" : "#000000", 0);
660 SetPen(cr, 2, marker == 2 ? "#FF0000" : "#FFFF00", 0);
668 DrawDot (int marker, int x, int y, int r)
669 { // used for atomic captures; no need to draw on backup
670 DoDrawDot(csBoardWindow, marker, x, y, r);
671 GraphExpose(currBoard, x-r, y-r, 2*r, 2*r);
675 DrawOneSquare (int x, int y, ChessSquare piece, int square_color, int marker, char *string, int align)
676 { // basic front-end board-draw function: takes care of everything that can be in square:
677 // piece, background, coordinate/count, marker dot
680 if (piece == EmptySquare) {
681 BlankSquare(csBoardWindow, x, y, square_color, piece, 1);
683 pngDrawPiece(csBoardWindow, piece, square_color, x, y);
686 if(align) { // square carries inscription (coord or piece count)
688 cairo_text_extents_t te;
690 cr = cairo_create (csBoardWindow);
691 cairo_select_font_face (cr, "Sans",
692 CAIRO_FONT_SLANT_NORMAL,
693 CAIRO_FONT_WEIGHT_BOLD);
695 cairo_set_font_size (cr, squareSize/4);
696 // calculate where it goes
697 cairo_text_extents (cr, string, &te);
700 xx += squareSize - te.width - te.x_bearing - 1;
701 yy += squareSize - te.height - te.y_bearing - 1;
702 } else if (align == 2) {
703 xx += te.x_bearing + 1, yy += -te.y_bearing + 1;
704 } else if (align == 3) {
705 xx += squareSize - te.width -te.x_bearing - 1;
706 yy += -te.y_bearing + 3;
707 } else if (align == 4) {
708 xx += te.x_bearing + 1, yy += -te.y_bearing + 3;
711 cairo_move_to (cr, xx-1, yy);
712 if(align < 3) cairo_set_source_rgb (cr, 0.0, 0.0, 0.0);
713 else cairo_set_source_rgb (cr, 1.0, 1.0, 1.0);
714 cairo_show_text (cr, string);
718 if(marker) { // print fat marker dot, if requested
719 DoDrawDot(csBoardWindow, marker, x + squareSize/4, y+squareSize/4, squareSize/2);
723 /**** Animation code by Hugh Fisher, DCS, ANU. ****/
725 /* Masks for XPM pieces. Black and white pieces can have
726 different shapes, but in the interest of retaining my
727 sanity pieces must have the same outline on both light
728 and dark squares, and all pieces must use the same
729 background square colors/images. */
731 static cairo_surface_t *c_animBufs[3*NrOfAnims]; // newBuf, saveBuf
734 InitAnimState (AnimNr anr)
736 if(c_animBufs[anr]) cairo_surface_destroy (c_animBufs[anr]);
737 if(c_animBufs[anr+2]) cairo_surface_destroy (c_animBufs[anr+2]);
738 c_animBufs[anr+4] = csBoardWindow;
739 c_animBufs[anr+2] = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, squareSize, squareSize);
740 c_animBufs[anr] = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, squareSize, squareSize);
747 InitAnimState(Player);
751 CairoOverlayPiece (ChessSquare piece, cairo_surface_t *dest)
753 static cairo_t *pieceSource;
754 pieceSource = cairo_create (dest);
755 cairo_set_source_surface (pieceSource, pngPieceBitmaps[!White(piece)][piece % BlackPawn], 0, 0);
756 if(doubleClick) cairo_paint_with_alpha (pieceSource, 0.6);
757 else cairo_paint(pieceSource);
758 cairo_destroy (pieceSource);
762 InsertPiece (AnimNr anr, ChessSquare piece)
764 CairoOverlayPiece(piece, c_animBufs[anr]);
768 DrawBlank (AnimNr anr, int x, int y, int startColor)
770 BlankSquare(c_animBufs[anr+2], x, y, startColor, EmptySquare, 0);
773 void CopyRectangle (AnimNr anr, int srcBuf, int destBuf,
774 int srcX, int srcY, int width, int height, int destX, int destY)
776 cairo_t *cr = cairo_create (c_animBufs[anr+destBuf]);
777 cairo_set_source_surface (cr, c_animBufs[anr+srcBuf], destX - srcX, destY - srcY);
778 cairo_rectangle (cr, destX, destY, width, height);
781 if(c_animBufs[anr+destBuf] == csBoardWindow)
782 GraphExpose(currBoard, destX, destY, squareSize, squareSize);
786 SetDragPiece (AnimNr anr, ChessSquare piece)
790 /* [AS] Arrow highlighting support */
793 DoDrawPolygon (cairo_surface_t *cs, Pnt arrow[], int nr)
797 cr = cairo_create (cs);
798 cairo_move_to (cr, arrow[nr-1].x, arrow[nr-1].y);
800 cairo_line_to(cr, arrow[i].x, arrow[i].y);
802 if(appData.monoMode) { // should we always outline arrow?
803 cairo_line_to(cr, arrow[0].x, arrow[0].y);
804 SetPen(cr, 2, "#000000", 0);
805 cairo_stroke_preserve(cr);
807 SetPen(cr, 2, appData.highlightSquareColor, 0);
815 DrawPolygon (Pnt arrow[], int nr)
817 DoDrawPolygon(csBoardWindow, arrow, nr);
818 // if(!dual) DoDrawPolygon(csBoardBackup, arrow, nr);