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);
137 #define BoardSize int
139 InitDrawingSizes (BoardSize boardSize, int flags)
140 { // [HGM] resize is functional now, but for board format changes only (nr of ranks, files)
141 int boardWidth, boardHeight;
143 static int oldWidth, oldHeight;
144 static VariantClass oldVariant;
145 static int oldMono = -1, oldTwoBoards = 0;
146 extern Widget formWidget;
148 if(!formWidget) return;
150 if(oldTwoBoards && !twoBoards) PopDown(DummyDlg);
151 oldTwoBoards = twoBoards;
153 if(appData.overrideLineGap >= 0) lineGap = appData.overrideLineGap;
154 boardWidth = lineGap + BOARD_WIDTH * (squareSize + lineGap);
155 boardHeight = lineGap + BOARD_HEIGHT * (squareSize + lineGap);
157 if(boardWidth != oldWidth || boardHeight != oldHeight) { // do resizing stuff only if size actually changed
159 oldWidth = boardWidth; oldHeight = boardHeight;
163 * Inhibit shell resizing.
165 ResizeBoardWindow(boardWidth, boardHeight, 0);
170 // [HGM] pieces: tailor piece bitmaps to needs of specific variant
173 if(gameInfo.variant != oldVariant) { // and only if variant changed
177 for(p=0; p<=(int)WhiteKing; p++)
178 pngPieceBitmaps[i][p] = pngPieceBitmaps2[i][p]; // defaults
179 if(gameInfo.variant == VariantShogi) {
180 pngPieceBitmaps[i][(int)WhiteCannon] = pngPieceBitmaps2[i][(int)WhiteKing+1];
181 pngPieceBitmaps[i][(int)WhiteNightrider] = pngPieceBitmaps2[i][(int)WhiteKing+2];
182 pngPieceBitmaps[i][(int)WhiteSilver] = pngPieceBitmaps2[i][(int)WhiteKing+3];
183 pngPieceBitmaps[i][(int)WhiteGrasshopper] = pngPieceBitmaps2[i][(int)WhiteKing+4];
184 pngPieceBitmaps[i][(int)WhiteQueen] = pngPieceBitmaps2[i][(int)WhiteLance];
187 if(gameInfo.variant == VariantGothic) {
188 pngPieceBitmaps[i][(int)WhiteMarshall] = pngPieceBitmaps2[i][(int)WhiteSilver];
191 if(gameInfo.variant == VariantSChess) {
192 pngPieceBitmaps[i][(int)WhiteAngel] = pngPieceBitmaps2[i][(int)WhiteFalcon];
193 pngPieceBitmaps[i][(int)WhiteMarshall] = pngPieceBitmaps2[i][(int)WhiteAlfil];
196 oldMono = -10; // kludge to force recreation of animation masks
197 oldVariant = gameInfo.variant;
200 oldMono = appData.monoMode;
204 ExposeRedraw (Option *graph, int x, int y, int w, int h)
205 { // copy a selected part of the buffer bitmap to the display
206 cairo_t *cr = cairo_create((cairo_surface_t *) graph->textValue);
207 cairo_set_source_surface(cr, (cairo_surface_t *) graph->choice, 0, 0);
208 cairo_set_antialias(cr, CAIRO_ANTIALIAS_NONE);
209 cairo_rectangle(cr, x, y, w, h);
215 CreatePNGBoard (char *s, int kind)
217 if(!appData.useBitmaps || s == NULL || *s == 0 || *s == '*') { useTexture &= ~(kind+1); return; }
218 if(strstr(s, ".png")) {
219 cairo_surface_t *img = cairo_image_surface_create_from_png (s);
221 useTexture |= kind + 1; pngBoardBitmap[kind] = img;
222 textureW[kind] = cairo_image_surface_get_width (img);
223 textureH[kind] = cairo_image_surface_get_height (img);
228 char *pngPieceNames[] = // must be in same order as internal piece encoding
229 { "Pawn", "Knight", "Bishop", "Rook", "Queen", "Advisor", "Elephant", "Archbishop", "Marshall", "Gold", "Commoner",
230 "Canon", "Nightrider", "CrownedBishop", "CrownedRook", "Princess", "Chancellor", "Hawk", "Lance", "Cobra", "Unicorn", "King",
231 "GoldKnight", "GoldLance", "GoldPawn", "GoldSilver", NULL
235 LoadSVG (char *dir, int color, int piece)
238 RsvgHandle *svg=svgPieces[color][piece];
239 RsvgDimensionData svg_dimensions;
240 GError **svgerror=NULL;
241 cairo_surface_t *img;
244 snprintf(buf, MSG_SIZ, "%s/%s%s.svg", dir, color ? "Black" : "White", pngPieceNames[piece]);
246 if(svg || *dir && (svg = rsvg_handle_new_from_file(buf,svgerror))) {
248 rsvg_handle_get_dimensions(svg, &svg_dimensions);
249 img = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, squareSize, squareSize);
251 cr = cairo_create(img);
252 cairo_scale(cr, squareSize/(double) svg_dimensions.width, squareSize/(double) svg_dimensions.height);
253 rsvg_handle_render_cairo(svg, cr);
254 if(cairo_surface_status(img) == CAIRO_STATUS_SUCCESS) {
255 if(pngPieceImages[color][piece]) cairo_surface_destroy(pngPieceImages[color][piece]);
256 pngPieceImages[color][piece] = img;
266 ScaleOnePiece (int color, int piece)
270 cairo_surface_t *img, *cs;
275 if(!svgPieces[color][piece]) { // try to freshly render cached svg pieces first, to supply the source bitmap
276 svgPieces[color][piece] = LoadSVG("", color, piece); // this fills pngPieceImages if we had cached svg with bitmap of wanted size
279 if(!pngPieceImages[color][piece]) { // we don't have cached bitmap (implying we did not have cached svg)
280 if(*appData.pieceDirectory) { // user specified piece directory
281 snprintf(buf, MSG_SIZ, "%s/%s%s.png", appData.pieceDirectory, color ? "Black" : "White", pngPieceNames[piece]);
282 pngPieceImages[color][piece] = img = cairo_image_surface_create_from_png (buf); // try if there are png pieces there
283 if(cairo_surface_status(img) != CAIRO_STATUS_SUCCESS) { // there were not
284 svgPieces[color][piece] = LoadSVG(appData.pieceDirectory, color, piece); // so try if he has svg there
289 if(!pngPieceImages[color][piece]) { // we still did not manage to acquire a piece bitmap
290 static int warned = 0;
291 if(!(svgPieces[color][piece] = LoadSVG(SVGDIR, color, piece)) && !warned) { // try to fall back on installed svg
292 char *msg = _("No default pieces installed\nSelect your own -pieceImageDirectory");
293 printf("%s\n", msg); // give up
294 DisplayError(msg, 0);
295 warned = 1; // prevent error message being repeated for each piece type
299 img = pngPieceImages[color][piece];
301 // create new bitmap to hold scaled piece image (and remove any old)
302 if(pngPieceBitmaps2[color][piece]) cairo_surface_destroy (pngPieceBitmaps2[color][piece]);
303 pngPieceBitmaps2[color][piece] = cs = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, squareSize, squareSize);
304 if(piece <= WhiteKing) pngPieceBitmaps[color][piece] = cs;
308 // scaled copying of the raw png image
309 cr = cairo_create(cs);
310 w = cairo_image_surface_get_width (img);
311 h = cairo_image_surface_get_height (img);
312 cairo_scale(cr, squareSize/w, squareSize/h);
313 cairo_set_source_surface (cr, img, 0, 0);
317 if(!appData.trueColors || !*appData.pieceDirectory) { // operate on bitmap to color it (king-size hack...)
318 int stride = cairo_image_surface_get_stride(cs)/4;
319 int *buf = (int *) cairo_image_surface_get_data(cs);
321 sscanf(color ? appData.blackPieceColor+1 : appData.whitePieceColor+1, "%x", &p); // replacement color
322 cairo_surface_flush(cs);
323 for(i=0; i<squareSize; i++) for(j=0; j<squareSize; j++) {
326 unsigned int c = buf[i*stride + j];
327 a = c >> 24; r = c >> 16 & 255; // alpha and red, where red is the 'white' weight, since white is #FFFFCC in the source images
328 f = (color ? a - r : r)/255.; // fraction of black or white in the mix that has to be replaced
329 buf[i*stride + j] = c & 0xFF000000; // alpha channel is kept at same opacity
330 buf[i*stride + j] += ((int)(f*(p&0xFF0000)) & 0xFF0000) + ((int)(f*(p&0xFF00)) & 0xFF00) + (int)(f*(p&0xFF)); // add desired fraction of new color
331 if(color) buf[i*stride + j] += r | r << 8 | r << 16; // details on black pieces get their weight added in pure white
332 if(appData.monoMode) {
333 if(a < 64) buf[i*stride + j] = 0; // if not opaque enough, totally transparent
334 else if(2*r < a) buf[i*stride + j] = 0xFF000000; // if not light enough, totally black
335 else buf[i*stride + j] = 0xFFFFFFFF; // otherwise white
338 cairo_surface_mark_dirty(cs);
347 for(p=0; pngPieceNames[p]; p++) {
355 { // [HGM] taken out of main
357 CreatePNGBoard(appData.liteBackTextureFile, 1);
358 CreatePNGBoard(appData.darkBackTextureFile, 0);
362 InitDrawingParams (int reloadPieces)
366 for(i=0; i<2; i++) for(p=0; p<BlackPawn+4; p++) {
367 if(pngPieceImages[i][p]) cairo_surface_destroy(pngPieceImages[i][p]);
368 pngPieceImages[i][p] = NULL;
369 if(svgPieces[i][p]) rsvg_handle_close(svgPieces[i][p], NULL);
370 svgPieces[i][p] = NULL;
375 // [HGM] seekgraph: some low-level drawing routines (by JC, mostly)
378 Color (char *col, int n)
381 sscanf(col, "#%x", &c);
387 SetPen (cairo_t *cr, float w, char *col, int dash)
389 static const double dotted[] = {4.0, 4.0};
390 static int len = sizeof(dotted) / sizeof(dotted[0]);
391 cairo_set_line_width (cr, w);
392 cairo_set_source_rgba (cr, Color(col, 4), Color(col, 2), Color(col, 0), 1.0);
393 if(dash) cairo_set_dash (cr, dotted, len, 0.0);
396 void DrawSeekAxis( int x, int y, int xTo, int yTo )
401 cr = cairo_create (csBoardWindow);
403 cairo_move_to (cr, x, y);
404 cairo_line_to(cr, xTo, yTo );
406 SetPen(cr, 2, "#000000", 0);
411 GraphExpose(currBoard, x-1, yTo-1, xTo-x+2, y-yTo+2);
414 void DrawSeekBackground( int left, int top, int right, int bottom )
416 cairo_t *cr = cairo_create (csBoardWindow);
418 cairo_rectangle (cr, left, top, right-left, bottom-top);
420 cairo_set_source_rgba(cr, 0.8, 0.8, 0.4,1.0);
425 GraphExpose(currBoard, left, top, right-left, bottom-top);
428 void DrawSeekText(char *buf, int x, int y)
430 cairo_t *cr = cairo_create (csBoardWindow);
432 cairo_select_font_face (cr, "Sans",
433 CAIRO_FONT_SLANT_NORMAL,
434 CAIRO_FONT_WEIGHT_NORMAL);
436 cairo_set_font_size (cr, 12.0);
438 cairo_move_to (cr, x, y+4);
439 cairo_set_source_rgba(cr, 0, 0, 0,1.0);
440 cairo_show_text( cr, buf);
444 GraphExpose(currBoard, x-5, y-10, 60, 15);
447 void DrawSeekDot(int x, int y, int colorNr)
449 cairo_t *cr = cairo_create (csBoardWindow);
450 int square = colorNr & 0x80;
454 cairo_rectangle (cr, x-squareSize/9, y-squareSize/9, 2*(squareSize/9), 2*(squareSize/9));
456 cairo_arc(cr, x, y, squareSize/9, 0.0, 2*M_PI);
458 SetPen(cr, 2, "#000000", 0);
459 cairo_stroke_preserve(cr);
461 case 0: cairo_set_source_rgba(cr, 1.0, 0, 0,1.0); break;
462 case 1: cairo_set_source_rgba (cr, 0.0, 0.7, 0.2, 1.0); break;
463 default: cairo_set_source_rgba (cr, 1.0, 1.0, 0.0, 1.0); break;
469 GraphExpose(currBoard, x-squareSize/8, y-squareSize/8, 2*(squareSize/8), 2*(squareSize/8));
473 InitDrawingHandle (Option *opt)
475 csBoardWindow = DRAWABLE(opt);
483 if (lineGap == 0) return;
485 /* [HR] Split this into 2 loops for non-square boards. */
487 for (i = 0; i < BOARD_HEIGHT + 1; i++) {
488 gridSegments[i].x1 = 0;
490 lineGap + BOARD_WIDTH * (squareSize + lineGap);
491 gridSegments[i].y1 = gridSegments[i].y2
492 = lineGap / 2 + (i * (squareSize + lineGap));
495 for (j = 0; j < BOARD_WIDTH + 1; j++) {
496 gridSegments[j + i].y1 = 0;
497 gridSegments[j + i].y2 =
498 lineGap + BOARD_HEIGHT * (squareSize + lineGap);
499 gridSegments[j + i].x1 = gridSegments[j + i].x2
500 = lineGap / 2 + (j * (squareSize + lineGap));
507 /* draws a grid starting around Nx, Ny squares starting at x,y */
509 float odd = (lineGap & 1)/2.;
513 cr = cairo_create (csBoardWindow);
515 cairo_set_antialias (cr, CAIRO_ANTIALIAS_NONE);
516 SetPen(cr, lineGap, "#000000", 0);
519 for (i = 0; i < BOARD_WIDTH + BOARD_HEIGHT + 2; i++)
521 int h = (gridSegments[i].y1 == gridSegments[i].y2); // horizontal
522 cairo_move_to (cr, gridSegments[i].x1 + !h*odd, gridSegments[i].y1 + h*odd);
523 cairo_line_to (cr, gridSegments[i].x2 + !h*odd, gridSegments[i].y2 + h*odd);
534 DrawBorder (int x, int y, int type, int odd)
540 case 0: col = "#000000"; break;
541 case 1: col = appData.highlightSquareColor; break;
542 case 2: col = appData.premoveHighlightColor; break;
544 cr = cairo_create(csBoardWindow);
545 cairo_set_antialias(cr, CAIRO_ANTIALIAS_NONE);
546 cairo_rectangle(cr, x+odd/2., y+odd/2., squareSize+lineGap, squareSize+lineGap);
547 SetPen(cr, lineGap, col, 0);
550 GraphExpose(currBoard, x - lineGap/2, y - lineGap/2, squareSize+2*lineGap+odd, squareSize+2*lineGap+odd);
554 CutOutSquare (int x, int y, int *x0, int *y0, int kind)
556 int W = BOARD_WIDTH, H = BOARD_HEIGHT;
557 int nx = x/(squareSize + lineGap), ny = y/(squareSize + lineGap);
559 if(textureW[kind] < squareSize || textureH[kind] < squareSize) return 0;
560 if(textureW[kind] < W*squareSize)
561 *x0 = (textureW[kind] - squareSize) * nx/(W-1);
563 *x0 = textureW[kind]*nx / W + (textureW[kind] - W*squareSize) / (2*W);
564 if(textureH[kind] < H*squareSize)
565 *y0 = (textureH[kind] - squareSize) * ny/(H-1);
567 *y0 = textureH[kind]*ny / H + (textureH[kind] - H*squareSize) / (2*H);
572 DrawLogo (Option *opt, void *logo)
574 cairo_surface_t *img;
578 if(!logo || !opt) return;
579 img = cairo_image_surface_create_from_png (logo);
580 w = cairo_image_surface_get_width (img);
581 h = cairo_image_surface_get_height (img);
582 cr = cairo_create(DRAWABLE(opt));
583 cairo_scale(cr, (float)appData.logoSize/w, appData.logoSize/(2.*h));
584 cairo_set_source_surface (cr, img, 0, 0);
587 cairo_surface_destroy (img);
588 GraphExpose(opt, 0, 0, appData.logoSize, appData.logoSize/2);
592 BlankSquare (cairo_surface_t *dest, int x, int y, int color, ChessSquare piece, int fac)
593 { // [HGM] extra param 'fac' for forcing destination to (0,0) for copying to animation buffer
597 cr = cairo_create (dest);
599 if ((useTexture & color+1) && CutOutSquare(x, y, &x0, &y0, color)) {
600 cairo_set_source_surface (cr, pngBoardBitmap[color], x*fac - x0, y*fac - y0);
601 cairo_set_antialias (cr, CAIRO_ANTIALIAS_NONE);
602 cairo_rectangle (cr, x*fac, y*fac, squareSize, squareSize);
605 } else { // evenly colored squares
608 case 0: col = appData.darkSquareColor; break;
609 case 1: col = appData.lightSquareColor; break;
610 case 2: col = "#000000"; break;
612 SetPen(cr, 2.0, col, 0);
613 cairo_rectangle (cr, fac*x, fac*y, squareSize, squareSize);
614 cairo_set_antialias (cr, CAIRO_ANTIALIAS_NONE);
621 pngDrawPiece (cairo_surface_t *dest, ChessSquare piece, int square_color, int x, int y)
626 if ((int)piece < (int) BlackPawn) {
632 if(appData.upsideDown && flipView) { p += p < BlackPawn ? BlackPawn : -BlackPawn; }// swap white and black pieces
633 BlankSquare(dest, x, y, square_color, piece, 1); // erase previous contents with background
634 cr = cairo_create (dest);
635 cairo_set_source_surface (cr, pngPieceBitmaps[kind][piece], x, y);
641 DoDrawDot (cairo_surface_t *cs, int marker, int x, int y, int r)
645 cr = cairo_create(cs);
646 cairo_arc(cr, x+r/2, y+r/2, r/2, 0.0, 2*M_PI);
647 if(appData.monoMode) {
648 SetPen(cr, 2, marker == 2 ? "#000000" : "#FFFFFF", 0);
649 cairo_stroke_preserve(cr);
650 SetPen(cr, 2, marker == 2 ? "#FFFFFF" : "#000000", 0);
652 SetPen(cr, 2, marker == 2 ? "#FF0000" : "#FFFF00", 0);
660 DrawDot (int marker, int x, int y, int r)
661 { // used for atomic captures; no need to draw on backup
662 DoDrawDot(csBoardWindow, marker, x, y, r);
663 GraphExpose(currBoard, x-r, y-r, 2*r, 2*r);
667 DrawOneSquare (int x, int y, ChessSquare piece, int square_color, int marker, char *string, int align)
668 { // basic front-end board-draw function: takes care of everything that can be in square:
669 // piece, background, coordinate/count, marker dot
672 if (piece == EmptySquare) {
673 BlankSquare(csBoardWindow, x, y, square_color, piece, 1);
675 pngDrawPiece(csBoardWindow, piece, square_color, x, y);
678 if(align) { // square carries inscription (coord or piece count)
680 cairo_text_extents_t te;
682 cr = cairo_create (csBoardWindow);
683 cairo_select_font_face (cr, "Sans",
684 CAIRO_FONT_SLANT_NORMAL,
685 CAIRO_FONT_WEIGHT_BOLD);
687 cairo_set_font_size (cr, squareSize/4);
688 // calculate where it goes
689 cairo_text_extents (cr, string, &te);
692 xx += squareSize - te.width - te.x_bearing - 1;
693 yy += squareSize - te.height - te.y_bearing - 1;
694 } else if (align == 2) {
695 xx += te.x_bearing + 1, yy += -te.y_bearing + 1;
696 } else if (align == 3) {
697 xx += squareSize - te.width -te.x_bearing - 1;
698 yy += -te.y_bearing + 3;
699 } else if (align == 4) {
700 xx += te.x_bearing + 1, yy += -te.y_bearing + 3;
703 cairo_move_to (cr, xx-1, yy);
704 if(align < 3) cairo_set_source_rgb (cr, 0.0, 0.0, 0.0);
705 else cairo_set_source_rgb (cr, 1.0, 1.0, 1.0);
706 cairo_show_text (cr, string);
710 if(marker) { // print fat marker dot, if requested
711 DoDrawDot(csBoardWindow, marker, x + squareSize/4, y+squareSize/4, squareSize/2);
715 /**** Animation code by Hugh Fisher, DCS, ANU. ****/
717 /* Masks for XPM pieces. Black and white pieces can have
718 different shapes, but in the interest of retaining my
719 sanity pieces must have the same outline on both light
720 and dark squares, and all pieces must use the same
721 background square colors/images. */
723 static cairo_surface_t *c_animBufs[3*NrOfAnims]; // newBuf, saveBuf
726 InitAnimState (AnimNr anr)
728 if(c_animBufs[anr]) cairo_surface_destroy (c_animBufs[anr]);
729 if(c_animBufs[anr+2]) cairo_surface_destroy (c_animBufs[anr+2]);
730 c_animBufs[anr+4] = csBoardWindow;
731 c_animBufs[anr+2] = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, squareSize, squareSize);
732 c_animBufs[anr] = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, squareSize, squareSize);
739 InitAnimState(Player);
743 CairoOverlayPiece (ChessSquare piece, cairo_surface_t *dest)
745 static cairo_t *pieceSource;
746 pieceSource = cairo_create (dest);
747 cairo_set_source_surface (pieceSource, pngPieceBitmaps[!White(piece)][piece % BlackPawn], 0, 0);
748 if(doubleClick) cairo_paint_with_alpha (pieceSource, 0.6);
749 else cairo_paint(pieceSource);
750 cairo_destroy (pieceSource);
754 InsertPiece (AnimNr anr, ChessSquare piece)
756 CairoOverlayPiece(piece, c_animBufs[anr]);
760 DrawBlank (AnimNr anr, int x, int y, int startColor)
762 BlankSquare(c_animBufs[anr+2], x, y, startColor, EmptySquare, 0);
765 void CopyRectangle (AnimNr anr, int srcBuf, int destBuf,
766 int srcX, int srcY, int width, int height, int destX, int destY)
768 cairo_t *cr = cairo_create (c_animBufs[anr+destBuf]);
769 cairo_set_source_surface (cr, c_animBufs[anr+srcBuf], destX - srcX, destY - srcY);
770 cairo_rectangle (cr, destX, destY, width, height);
773 if(c_animBufs[anr+destBuf] == csBoardWindow)
774 GraphExpose(currBoard, destX, destY, squareSize, squareSize);
778 SetDragPiece (AnimNr anr, ChessSquare piece)
782 /* [AS] Arrow highlighting support */
785 DoDrawPolygon (cairo_surface_t *cs, Pnt arrow[], int nr)
789 cr = cairo_create (cs);
790 cairo_move_to (cr, arrow[nr-1].x, arrow[nr-1].y);
792 cairo_line_to(cr, arrow[i].x, arrow[i].y);
794 if(appData.monoMode) { // should we always outline arrow?
795 cairo_line_to(cr, arrow[0].x, arrow[0].y);
796 SetPen(cr, 2, "#000000", 0);
797 cairo_stroke_preserve(cr);
799 SetPen(cr, 2, appData.highlightSquareColor, 0);
807 DrawPolygon (Pnt arrow[], int nr)
809 DoDrawPolygon(csBoardWindow, arrow, nr);
810 // if(!dual) DoDrawPolygon(csBoardBackup, arrow, nr);