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;
169 static int oldWidth, oldHeight;
170 static VariantClass oldVariant;
171 static int oldMono = -1, oldTwoBoards = 0;
172 extern Widget formWidget;
174 if(!formWidget) return;
176 if(oldTwoBoards && !twoBoards) PopDown(DummyDlg);
177 oldTwoBoards = twoBoards;
179 if(appData.overrideLineGap >= 0) lineGap = appData.overrideLineGap;
180 boardWidth = lineGap + BOARD_WIDTH * (squareSize + lineGap);
181 boardHeight = lineGap + BOARD_HEIGHT * (squareSize + lineGap);
183 if(boardWidth != oldWidth || boardHeight != oldHeight) { // do resizing stuff only if size actually changed
185 oldWidth = boardWidth; oldHeight = boardHeight;
189 * Inhibit shell resizing.
191 ResizeBoardWindow(boardWidth, boardHeight, 0);
196 // [HGM] pieces: tailor piece bitmaps to needs of specific variant
199 if(gameInfo.variant != oldVariant) { // and only if variant changed
201 SelectPieces(gameInfo.variant);
203 oldMono = -10; // kludge to force recreation of animation masks
204 oldVariant = gameInfo.variant;
207 oldMono = appData.monoMode;
211 ExposeRedraw (Option *graph, int x, int y, int w, int h)
212 { // copy a selected part of the buffer bitmap to the display
213 cairo_t *cr = cairo_create((cairo_surface_t *) graph->textValue);
214 cairo_set_source_surface(cr, (cairo_surface_t *) graph->choice, 0, 0);
215 cairo_set_antialias(cr, CAIRO_ANTIALIAS_NONE);
216 cairo_rectangle(cr, x, y, w, h);
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 LoadSVG (char *dir, int color, int piece)
245 RsvgHandle *svg=svgPieces[color][piece];
246 RsvgDimensionData svg_dimensions;
247 GError *svgerror=NULL;
248 cairo_surface_t *img;
251 snprintf(buf, MSG_SIZ, "%s/%s%s.svg", dir, color ? "Black" : "White", pngPieceNames[piece]);
253 if(svg || *dir && (svg = rsvg_handle_new_from_file(buf, &svgerror))) {
255 rsvg_handle_get_dimensions(svg, &svg_dimensions);
256 img = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, squareSize, squareSize);
258 cr = cairo_create(img);
259 cairo_scale(cr, squareSize/(double) svg_dimensions.width, squareSize/(double) svg_dimensions.height);
260 rsvg_handle_render_cairo(svg, cr);
261 if(cairo_surface_status(img) == CAIRO_STATUS_SUCCESS) {
262 if(pngPieceImages[color][piece]) cairo_surface_destroy(pngPieceImages[color][piece]);
263 pngPieceImages[color][piece] = img;
270 g_error_free(svgerror);
275 ScaleOnePiece (int color, int piece)
279 cairo_surface_t *img, *cs;
284 svgPieces[color][piece] = LoadSVG("", color, piece); // this fills pngPieceImages if we had cached svg with bitmap of wanted size
286 if(!pngPieceImages[color][piece]) { // we don't have cached bitmap (implying we did not have cached svg)
287 if(*appData.pieceDirectory) { // user specified piece directory
288 snprintf(buf, MSG_SIZ, "%s/%s%s.png", appData.pieceDirectory, color ? "Black" : "White", pngPieceNames[piece]);
289 img = cairo_image_surface_create_from_png (buf); // try if there are png pieces there
290 if(cairo_surface_status(img) != CAIRO_STATUS_SUCCESS) { // there were not
291 svgPieces[color][piece] = LoadSVG(appData.pieceDirectory, color, piece); // so try if he has svg there
292 } else pngPieceImages[color][piece] = img;
296 if(!pngPieceImages[color][piece]) { // we still did not manage to acquire a piece bitmap
297 static int warned = 0;
298 if(!(svgPieces[color][piece] = LoadSVG(SVGDIR, color, piece)) && !warned) { // try to fall back on installed svg
299 char *msg = _("No default pieces installed\nSelect your own -pieceImageDirectory");
300 printf("%s\n", msg); // give up
301 DisplayError(msg, 0);
302 warned = 1; // prevent error message being repeated for each piece type
306 img = pngPieceImages[color][piece];
308 // create new bitmap to hold scaled piece image (and remove any old)
309 if(pngPieceBitmaps2[color][piece]) cairo_surface_destroy (pngPieceBitmaps2[color][piece]);
310 pngPieceBitmaps2[color][piece] = cs = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, squareSize, squareSize);
314 // scaled copying of the raw png image
315 cr = cairo_create(cs);
316 w = cairo_image_surface_get_width (img);
317 h = cairo_image_surface_get_height (img);
318 cairo_scale(cr, squareSize/w, squareSize/h);
319 cairo_set_source_surface (cr, img, 0, 0);
323 if(!appData.trueColors || !*appData.pieceDirectory) { // operate on bitmap to color it (king-size hack...)
324 int stride = cairo_image_surface_get_stride(cs)/4;
325 int *buf = (int *) cairo_image_surface_get_data(cs);
327 sscanf(color ? appData.blackPieceColor+1 : appData.whitePieceColor+1, "%x", &p); // replacement color
328 cairo_surface_flush(cs);
329 for(i=0; i<squareSize; i++) for(j=0; j<squareSize; j++) {
332 unsigned int c = buf[i*stride + j];
333 a = c >> 24; r = c >> 16 & 255; // alpha and red, where red is the 'white' weight, since white is #FFFFCC in the source images
334 f = (color ? a - r : r)/255.; // fraction of black or white in the mix that has to be replaced
335 buf[i*stride + j] = c & 0xFF000000; // alpha channel is kept at same opacity
336 buf[i*stride + j] += ((int)(f*(p&0xFF0000)) & 0xFF0000) + ((int)(f*(p&0xFF00)) & 0xFF00) + (int)(f*(p&0xFF)); // add desired fraction of new color
337 if(color) buf[i*stride + j] += r | r << 8 | r << 16; // details on black pieces get their weight added in pure white
338 if(appData.monoMode) {
339 if(a < 64) buf[i*stride + j] = 0; // if not opaque enough, totally transparent
340 else if(2*r < a) buf[i*stride + j] = 0xFF000000; // if not light enough, totally black
341 else buf[i*stride + j] = 0xFFFFFFFF; // otherwise white
344 cairo_surface_mark_dirty(cs);
353 for(p=0; pngPieceNames[p]; p++) {
357 SelectPieces(gameInfo.variant);
362 { // [HGM] taken out of main
364 CreatePNGBoard(appData.liteBackTextureFile, 1);
365 CreatePNGBoard(appData.darkBackTextureFile, 0);
369 InitDrawingParams (int reloadPieces)
373 for(i=0; i<2; i++) for(p=0; p<BlackPawn+4; p++) {
374 if(pngPieceImages[i][p]) cairo_surface_destroy(pngPieceImages[i][p]);
375 pngPieceImages[i][p] = NULL;
376 if(svgPieces[i][p]) rsvg_handle_close(svgPieces[i][p], NULL);
377 svgPieces[i][p] = NULL;
382 // [HGM] seekgraph: some low-level drawing routines (by JC, mostly)
385 Color (char *col, int n)
388 sscanf(col, "#%x", &c);
394 SetPen (cairo_t *cr, float w, char *col, int dash)
396 static const double dotted[] = {4.0, 4.0};
397 static int len = sizeof(dotted) / sizeof(dotted[0]);
398 cairo_set_line_width (cr, w);
399 cairo_set_source_rgba (cr, Color(col, 4), Color(col, 2), Color(col, 0), 1.0);
400 if(dash) cairo_set_dash (cr, dotted, len, 0.0);
403 void DrawSeekAxis( int x, int y, int xTo, int yTo )
408 cr = cairo_create (csBoardWindow);
410 cairo_move_to (cr, x, y);
411 cairo_line_to(cr, xTo, yTo );
413 SetPen(cr, 2, "#000000", 0);
418 GraphExpose(currBoard, x-1, yTo-1, xTo-x+2, y-yTo+2);
421 void DrawSeekBackground( int left, int top, int right, int bottom )
423 cairo_t *cr = cairo_create (csBoardWindow);
425 cairo_rectangle (cr, left, top, right-left, bottom-top);
427 cairo_set_source_rgba(cr, 0.8, 0.8, 0.4,1.0);
432 GraphExpose(currBoard, left, top, right-left, bottom-top);
435 void DrawSeekText(char *buf, int x, int y)
437 cairo_t *cr = cairo_create (csBoardWindow);
439 cairo_select_font_face (cr, "Sans",
440 CAIRO_FONT_SLANT_NORMAL,
441 CAIRO_FONT_WEIGHT_NORMAL);
443 cairo_set_font_size (cr, 12.0);
445 cairo_move_to (cr, x, y+4);
446 cairo_set_source_rgba(cr, 0, 0, 0,1.0);
447 cairo_show_text( cr, buf);
451 GraphExpose(currBoard, x-5, y-10, 60, 15);
454 void DrawSeekDot(int x, int y, int colorNr)
456 cairo_t *cr = cairo_create (csBoardWindow);
457 int square = colorNr & 0x80;
461 cairo_rectangle (cr, x-squareSize/9, y-squareSize/9, 2*(squareSize/9), 2*(squareSize/9));
463 cairo_arc(cr, x, y, squareSize/9, 0.0, 2*M_PI);
465 SetPen(cr, 2, "#000000", 0);
466 cairo_stroke_preserve(cr);
468 case 0: cairo_set_source_rgba(cr, 1.0, 0, 0,1.0); break;
469 case 1: cairo_set_source_rgba (cr, 0.0, 0.7, 0.2, 1.0); break;
470 default: cairo_set_source_rgba (cr, 1.0, 1.0, 0.0, 1.0); break;
476 GraphExpose(currBoard, x-squareSize/8, y-squareSize/8, 2*(squareSize/8), 2*(squareSize/8));
480 InitDrawingHandle (Option *opt)
482 csBoardWindow = DRAWABLE(opt);
490 if (lineGap == 0) return;
492 /* [HR] Split this into 2 loops for non-square boards. */
494 for (i = 0; i < BOARD_HEIGHT + 1; i++) {
495 gridSegments[i].x1 = 0;
497 lineGap + BOARD_WIDTH * (squareSize + lineGap);
498 gridSegments[i].y1 = gridSegments[i].y2
499 = lineGap / 2 + (i * (squareSize + lineGap));
502 for (j = 0; j < BOARD_WIDTH + 1; j++) {
503 gridSegments[j + i].y1 = 0;
504 gridSegments[j + i].y2 =
505 lineGap + BOARD_HEIGHT * (squareSize + lineGap);
506 gridSegments[j + i].x1 = gridSegments[j + i].x2
507 = lineGap / 2 + (j * (squareSize + lineGap));
514 /* draws a grid starting around Nx, Ny squares starting at x,y */
516 float odd = (lineGap & 1)/2.;
520 cr = cairo_create (csBoardWindow);
522 cairo_set_antialias (cr, CAIRO_ANTIALIAS_NONE);
523 SetPen(cr, lineGap, "#000000", 0);
526 for (i = 0; i < BOARD_WIDTH + BOARD_HEIGHT + 2; i++)
528 int h = (gridSegments[i].y1 == gridSegments[i].y2); // horizontal
529 cairo_move_to (cr, gridSegments[i].x1 + !h*odd, gridSegments[i].y1 + h*odd);
530 cairo_line_to (cr, gridSegments[i].x2 + !h*odd, gridSegments[i].y2 + h*odd);
541 DrawBorder (int x, int y, int type, int odd)
547 case 0: col = "#000000"; break;
548 case 1: col = appData.highlightSquareColor; break;
549 case 2: col = appData.premoveHighlightColor; break;
551 cr = cairo_create(csBoardWindow);
552 cairo_set_antialias(cr, CAIRO_ANTIALIAS_NONE);
553 cairo_rectangle(cr, x+odd/2., y+odd/2., squareSize+lineGap, squareSize+lineGap);
554 SetPen(cr, lineGap, col, 0);
557 GraphExpose(currBoard, x - lineGap/2, y - lineGap/2, squareSize+2*lineGap+odd, squareSize+2*lineGap+odd);
561 CutOutSquare (int x, int y, int *x0, int *y0, int kind)
563 int W = BOARD_WIDTH, H = BOARD_HEIGHT;
564 int nx = x/(squareSize + lineGap), ny = y/(squareSize + lineGap);
566 if(textureW[kind] < squareSize || textureH[kind] < squareSize) return 0;
567 if(textureW[kind] < W*squareSize)
568 *x0 = (textureW[kind] - squareSize) * nx/(W-1);
570 *x0 = textureW[kind]*nx / W + (textureW[kind] - W*squareSize) / (2*W);
571 if(textureH[kind] < H*squareSize)
572 *y0 = (textureH[kind] - squareSize) * ny/(H-1);
574 *y0 = textureH[kind]*ny / H + (textureH[kind] - H*squareSize) / (2*H);
579 DrawLogo (Option *opt, void *logo)
581 cairo_surface_t *img;
585 if(!logo || !opt) return;
586 img = cairo_image_surface_create_from_png (logo);
587 w = cairo_image_surface_get_width (img);
588 h = cairo_image_surface_get_height (img);
589 cr = cairo_create(DRAWABLE(opt));
590 cairo_scale(cr, (float)appData.logoSize/w, appData.logoSize/(2.*h));
591 cairo_set_source_surface (cr, img, 0, 0);
594 cairo_surface_destroy (img);
595 GraphExpose(opt, 0, 0, appData.logoSize, appData.logoSize/2);
599 BlankSquare (cairo_surface_t *dest, int x, int y, int color, ChessSquare piece, int fac)
600 { // [HGM] extra param 'fac' for forcing destination to (0,0) for copying to animation buffer
604 cr = cairo_create (dest);
606 if ((useTexture & color+1) && CutOutSquare(x, y, &x0, &y0, color)) {
607 cairo_set_source_surface (cr, pngBoardBitmap[color], x*fac - x0, y*fac - y0);
608 cairo_set_antialias (cr, CAIRO_ANTIALIAS_NONE);
609 cairo_rectangle (cr, x*fac, y*fac, squareSize, squareSize);
612 } else { // evenly colored squares
615 case 0: col = appData.darkSquareColor; break;
616 case 1: col = appData.lightSquareColor; break;
617 case 2: col = "#000000"; break;
619 SetPen(cr, 2.0, col, 0);
620 cairo_rectangle (cr, fac*x, fac*y, squareSize, squareSize);
621 cairo_set_antialias (cr, CAIRO_ANTIALIAS_NONE);
628 pngDrawPiece (cairo_surface_t *dest, ChessSquare piece, int square_color, int x, int y)
633 if ((int)piece < (int) BlackPawn) {
639 if(appData.upsideDown && flipView) { p += p < BlackPawn ? BlackPawn : -BlackPawn; }// swap white and black pieces
640 BlankSquare(dest, x, y, square_color, piece, 1); // erase previous contents with background
641 cr = cairo_create (dest);
642 cairo_set_source_surface (cr, pngPieceBitmaps[kind][piece], x, y);
648 DoDrawDot (cairo_surface_t *cs, int marker, int x, int y, int r)
652 cr = cairo_create(cs);
653 cairo_arc(cr, x+r/2, y+r/2, r/2, 0.0, 2*M_PI);
654 if(appData.monoMode) {
655 SetPen(cr, 2, marker == 2 ? "#000000" : "#FFFFFF", 0);
656 cairo_stroke_preserve(cr);
657 SetPen(cr, 2, marker == 2 ? "#FFFFFF" : "#000000", 0);
659 SetPen(cr, 2, marker == 2 ? "#FF0000" : "#FFFF00", 0);
667 DrawDot (int marker, int x, int y, int r)
668 { // used for atomic captures; no need to draw on backup
669 DoDrawDot(csBoardWindow, marker, x, y, r);
670 GraphExpose(currBoard, x-r, y-r, 2*r, 2*r);
674 DrawOneSquare (int x, int y, ChessSquare piece, int square_color, int marker, char *string, int align)
675 { // basic front-end board-draw function: takes care of everything that can be in square:
676 // piece, background, coordinate/count, marker dot
679 if (piece == EmptySquare) {
680 BlankSquare(csBoardWindow, x, y, square_color, piece, 1);
682 pngDrawPiece(csBoardWindow, piece, square_color, x, y);
685 if(align) { // square carries inscription (coord or piece count)
687 cairo_text_extents_t te;
689 cr = cairo_create (csBoardWindow);
690 cairo_select_font_face (cr, "Sans",
691 CAIRO_FONT_SLANT_NORMAL,
692 CAIRO_FONT_WEIGHT_BOLD);
694 cairo_set_font_size (cr, squareSize/4);
695 // calculate where it goes
696 cairo_text_extents (cr, string, &te);
699 xx += squareSize - te.width - te.x_bearing - 1;
700 yy += squareSize - te.height - te.y_bearing - 1;
701 } else if (align == 2) {
702 xx += te.x_bearing + 1, yy += -te.y_bearing + 1;
703 } else if (align == 3) {
704 xx += squareSize - te.width -te.x_bearing - 1;
705 yy += -te.y_bearing + 3;
706 } else if (align == 4) {
707 xx += te.x_bearing + 1, yy += -te.y_bearing + 3;
710 cairo_move_to (cr, xx-1, yy);
711 if(align < 3) cairo_set_source_rgb (cr, 0.0, 0.0, 0.0);
712 else cairo_set_source_rgb (cr, 1.0, 1.0, 1.0);
713 cairo_show_text (cr, string);
717 if(marker) { // print fat marker dot, if requested
718 DoDrawDot(csBoardWindow, marker, x + squareSize/4, y+squareSize/4, squareSize/2);
722 /**** Animation code by Hugh Fisher, DCS, ANU. ****/
724 /* Masks for XPM pieces. Black and white pieces can have
725 different shapes, but in the interest of retaining my
726 sanity pieces must have the same outline on both light
727 and dark squares, and all pieces must use the same
728 background square colors/images. */
730 static cairo_surface_t *c_animBufs[3*NrOfAnims]; // newBuf, saveBuf
733 InitAnimState (AnimNr anr)
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 cairo_set_source_surface (cr, c_animBufs[anr+srcBuf], destX - srcX, destY - srcY);
777 cairo_rectangle (cr, destX, destY, width, height);
780 if(c_animBufs[anr+destBuf] == csBoardWindow)
781 GraphExpose(currBoard, destX, destY, squareSize, squareSize);
785 SetDragPiece (AnimNr anr, ChessSquare piece)
789 /* [AS] Arrow highlighting support */
792 DoDrawPolygon (cairo_surface_t *cs, Pnt arrow[], int nr)
796 cr = cairo_create (cs);
797 cairo_move_to (cr, arrow[nr-1].x, arrow[nr-1].y);
799 cairo_line_to(cr, arrow[i].x, arrow[i].y);
801 if(appData.monoMode) { // should we always outline arrow?
802 cairo_line_to(cr, arrow[0].x, arrow[0].y);
803 SetPen(cr, 2, "#000000", 0);
804 cairo_stroke_preserve(cr);
806 SetPen(cr, 2, appData.highlightSquareColor, 0);
814 DrawPolygon (Pnt arrow[], int nr)
816 DoDrawPolygon(csBoardWindow, arrow, nr);
817 // if(!dual) DoDrawPolygon(csBoardBackup, arrow, nr);