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, 2013 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 */
83 #include "evalgraph.h"
92 #define usleep(t) _sleep2(((t)+500)/1000)
96 # define _(s) gettext (s)
97 # define N_(s) gettext_noop (s)
105 Boolean cairoAnimate;
107 cairo_surface_t *csBoardWindow;
108 static cairo_surface_t *pngPieceImages[2][(int)BlackPawn+4]; // png 256 x 256 images
109 static cairo_surface_t *pngPieceBitmaps[2][(int)BlackPawn]; // scaled pieces as used
110 static cairo_surface_t *pngPieceBitmaps2[2][(int)BlackPawn+4]; // scaled pieces in store
111 static RsvgHandle *svgPieces[2][(int)BlackPawn+4]; // vector pieces in store
112 static cairo_surface_t *pngBoardBitmap[2];
113 int useTexture, textureW[2], textureH[2];
115 #define pieceToSolid(piece) &pieceBitmap[SOLID][(piece) % (int)BlackPawn]
116 #define pieceToOutline(piece) &pieceBitmap[OUTLINE][(piece) % (int)BlackPawn]
118 #define White(piece) ((int)(piece) < (int)BlackPawn)
120 char *crWhite = "#FFFFB0";
121 char *crBlack = "#AD5D3D";
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;
173 if(!mainOptions[W_BOARD].handle) return;
175 if(oldTwoBoards && !twoBoards) PopDown(DummyDlg);
176 oldTwoBoards = twoBoards;
178 if(appData.overrideLineGap >= 0) lineGap = appData.overrideLineGap;
179 boardWidth = lineGap + BOARD_WIDTH * (squareSize + lineGap);
180 boardHeight = lineGap + BOARD_HEIGHT * (squareSize + lineGap);
182 if(boardWidth != oldWidth || boardHeight != oldHeight) { // do resizing stuff only if size actually changed
184 oldWidth = boardWidth; oldHeight = boardHeight;
188 * Inhibit shell resizing.
190 ResizeBoardWindow(boardWidth, boardHeight, 0);
195 // [HGM] pieces: tailor piece bitmaps to needs of specific variant
198 if(gameInfo.variant != oldVariant) { // and only if variant changed
200 SelectPieces(gameInfo.variant);
202 oldMono = -10; // kludge to force recreation of animation masks
203 oldVariant = gameInfo.variant;
206 oldMono = appData.monoMode;
210 ExposeRedraw (Option *graph, int x, int y, int w, int h)
211 { // copy a selected part of the buffer bitmap to the display
212 cairo_t *cr = cairo_create((cairo_surface_t *) graph->textValue);
213 cairo_set_source_surface(cr, (cairo_surface_t *) graph->choice, 0, 0);
214 cairo_set_antialias(cr, CAIRO_ANTIALIAS_NONE);
215 cairo_rectangle(cr, x, y, w, h);
221 CreatePNGBoard (char *s, int kind)
223 if(!appData.useBitmaps || s == NULL || *s == 0 || *s == '*') { useTexture &= ~(kind+1); return; }
224 if(strstr(s, ".png")) {
225 cairo_surface_t *img = cairo_image_surface_create_from_png (s);
227 useTexture |= kind + 1; pngBoardBitmap[kind] = img;
228 textureW[kind] = cairo_image_surface_get_width (img);
229 textureH[kind] = cairo_image_surface_get_height (img);
234 char *pngPieceNames[] = // must be in same order as internal piece encoding
235 { "Pawn", "Knight", "Bishop", "Rook", "Queen", "Advisor", "Elephant", "Archbishop", "Marshall", "Gold", "Commoner",
236 "Canon", "Nightrider", "CrownedBishop", "CrownedRook", "Princess", "Chancellor", "Hawk", "Lance", "Cobra", "Unicorn", "King",
237 "GoldKnight", "GoldLance", "GoldPawn", "GoldSilver", NULL
241 LoadSVG (char *dir, int color, int piece)
244 RsvgHandle *svg=svgPieces[color][piece];
245 RsvgDimensionData svg_dimensions;
246 GError *svgerror=NULL;
247 cairo_surface_t *img;
250 snprintf(buf, MSG_SIZ, "%s/%s%s.svg", dir, color ? "Black" : "White", pngPieceNames[piece]);
252 if(svg || *dir && (svg = rsvg_handle_new_from_file(buf, &svgerror))) {
254 rsvg_handle_get_dimensions(svg, &svg_dimensions);
255 img = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, squareSize, squareSize);
257 cr = cairo_create(img);
258 cairo_scale(cr, squareSize/(double) svg_dimensions.width, squareSize/(double) svg_dimensions.height);
259 rsvg_handle_render_cairo(svg, cr);
260 if(cairo_surface_status(img) == CAIRO_STATUS_SUCCESS) {
261 if(pngPieceImages[color][piece]) cairo_surface_destroy(pngPieceImages[color][piece]);
262 pngPieceImages[color][piece] = img;
269 g_error_free(svgerror);
274 ScaleOnePiece (int color, int piece)
278 cairo_surface_t *img, *cs;
283 svgPieces[color][piece] = LoadSVG("", color, piece); // this fills pngPieceImages if we had cached svg with bitmap of wanted size
285 if(!pngPieceImages[color][piece]) { // we don't have cached bitmap (implying we did not have cached svg)
286 if(*appData.pieceDirectory) { // user specified piece directory
287 snprintf(buf, MSG_SIZ, "%s/%s%s.png", appData.pieceDirectory, color ? "Black" : "White", pngPieceNames[piece]);
288 img = cairo_image_surface_create_from_png (buf); // try if there are png pieces there
289 if(cairo_surface_status(img) != CAIRO_STATUS_SUCCESS) { // there were not
290 svgPieces[color][piece] = LoadSVG(appData.pieceDirectory, color, piece); // so try if he has svg there
291 } else pngPieceImages[color][piece] = img;
295 if(!pngPieceImages[color][piece]) { // we still did not manage to acquire a piece bitmap
296 static int warned = 0;
297 if(!(svgPieces[color][piece] = LoadSVG(SVGDIR, color, piece)) && !warned) { // try to fall back on installed svg
298 char *msg = _("No default pieces installed\nSelect your own -pieceImageDirectory");
299 printf("%s\n", msg); // give up
300 DisplayError(msg, 0);
301 warned = 1; // prevent error message being repeated for each piece type
305 img = pngPieceImages[color][piece];
307 // create new bitmap to hold scaled piece image (and remove any old)
308 if(pngPieceBitmaps2[color][piece]) cairo_surface_destroy (pngPieceBitmaps2[color][piece]);
309 pngPieceBitmaps2[color][piece] = cs = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, squareSize, squareSize);
313 // scaled copying of the raw png image
314 cr = cairo_create(cs);
315 w = cairo_image_surface_get_width (img);
316 h = cairo_image_surface_get_height (img);
317 cairo_scale(cr, squareSize/w, squareSize/h);
318 cairo_set_source_surface (cr, img, 0, 0);
322 if(!appData.trueColors || !*appData.pieceDirectory) { // operate on bitmap to color it (king-size hack...)
323 int stride = cairo_image_surface_get_stride(cs)/4;
324 int *buf = (int *) cairo_image_surface_get_data(cs);
326 sscanf(color ? appData.blackPieceColor+1 : appData.whitePieceColor+1, "%x", &p); // replacement color
327 cairo_surface_flush(cs);
328 for(i=0; i<squareSize; i++) for(j=0; j<squareSize; j++) {
331 unsigned int c = buf[i*stride + j];
332 a = c >> 24; r = c >> 16 & 255; // alpha and red, where red is the 'white' weight, since white is #FFFFCC in the source images
333 f = (color ? a - r : r)/255.; // fraction of black or white in the mix that has to be replaced
334 buf[i*stride + j] = c & 0xFF000000; // alpha channel is kept at same opacity
335 buf[i*stride + j] += ((int)(f*(p&0xFF0000)) & 0xFF0000) + ((int)(f*(p&0xFF00)) & 0xFF00) + (int)(f*(p&0xFF)); // add desired fraction of new color
336 if(color) buf[i*stride + j] += r | r << 8 | r << 16; // details on black pieces get their weight added in pure white
337 if(appData.monoMode) {
338 if(a < 64) buf[i*stride + j] = 0; // if not opaque enough, totally transparent
339 else if(2*r < a) buf[i*stride + j] = 0xFF000000; // if not light enough, totally black
340 else buf[i*stride + j] = 0xFFFFFFFF; // otherwise white
343 cairo_surface_mark_dirty(cs);
352 for(p=0; pngPieceNames[p]; p++) {
356 SelectPieces(gameInfo.variant);
361 { // [HGM] taken out of main
363 CreatePNGBoard(appData.liteBackTextureFile, 1);
364 CreatePNGBoard(appData.darkBackTextureFile, 0);
368 InitDrawingParams (int reloadPieces)
372 for(i=0; i<2; i++) for(p=0; p<BlackPawn+4; p++) {
373 if(pngPieceImages[i][p]) cairo_surface_destroy(pngPieceImages[i][p]);
374 pngPieceImages[i][p] = NULL;
375 if(svgPieces[i][p]) rsvg_handle_close(svgPieces[i][p], NULL);
376 svgPieces[i][p] = NULL;
381 // [HGM] seekgraph: some low-level drawing routines (by JC, mostly)
384 Color (char *col, int n)
387 sscanf(col, "#%x", &c);
393 SetPen (cairo_t *cr, float w, char *col, int dash)
395 static const double dotted[] = {4.0, 4.0};
396 static int len = sizeof(dotted) / sizeof(dotted[0]);
397 cairo_set_line_width (cr, w);
398 cairo_set_source_rgba (cr, Color(col, 4), Color(col, 2), Color(col, 0), 1.0);
399 if(dash) cairo_set_dash (cr, dotted, len, 0.0);
402 void DrawSeekAxis( int x, int y, int xTo, int yTo )
407 cr = cairo_create (csBoardWindow);
409 cairo_move_to (cr, x, y);
410 cairo_line_to(cr, xTo, yTo );
412 SetPen(cr, 2, "#000000", 0);
417 GraphExpose(currBoard, x-1, yTo-1, xTo-x+2, y-yTo+2);
420 void DrawSeekBackground( int left, int top, int right, int bottom )
422 cairo_t *cr = cairo_create (csBoardWindow);
424 cairo_rectangle (cr, left, top, right-left, bottom-top);
426 cairo_set_source_rgba(cr, 0.8, 0.8, 0.4,1.0);
431 GraphExpose(currBoard, left, top, right-left, bottom-top);
434 void DrawSeekText(char *buf, int x, int y)
436 cairo_t *cr = cairo_create (csBoardWindow);
438 cairo_select_font_face (cr, "Sans",
439 CAIRO_FONT_SLANT_NORMAL,
440 CAIRO_FONT_WEIGHT_NORMAL);
442 cairo_set_font_size (cr, 12.0);
444 cairo_move_to (cr, x, y+4);
445 cairo_set_source_rgba(cr, 0, 0, 0,1.0);
446 cairo_show_text( cr, buf);
450 GraphExpose(currBoard, x-5, y-10, 60, 15);
453 void DrawSeekDot(int x, int y, int colorNr)
455 cairo_t *cr = cairo_create (csBoardWindow);
456 int square = colorNr & 0x80;
460 cairo_rectangle (cr, x-squareSize/9, y-squareSize/9, 2*(squareSize/9), 2*(squareSize/9));
462 cairo_arc(cr, x, y, squareSize/9, 0.0, 2*M_PI);
464 SetPen(cr, 2, "#000000", 0);
465 cairo_stroke_preserve(cr);
467 case 0: cairo_set_source_rgba(cr, 1.0, 0, 0,1.0); break;
468 case 1: cairo_set_source_rgba (cr, 0.0, 0.7, 0.2, 1.0); break;
469 default: cairo_set_source_rgba (cr, 1.0, 1.0, 0.0, 1.0); break;
475 GraphExpose(currBoard, x-squareSize/8, y-squareSize/8, 2*(squareSize/8), 2*(squareSize/8));
479 InitDrawingHandle (Option *opt)
481 csBoardWindow = DRAWABLE(opt);
489 if (lineGap == 0) return;
491 /* [HR] Split this into 2 loops for non-square boards. */
493 for (i = 0; i < BOARD_HEIGHT + 1; i++) {
494 gridSegments[i].x1 = 0;
496 lineGap + BOARD_WIDTH * (squareSize + lineGap);
497 gridSegments[i].y1 = gridSegments[i].y2
498 = lineGap / 2 + (i * (squareSize + lineGap));
501 for (j = 0; j < BOARD_WIDTH + 1; j++) {
502 gridSegments[j + i].y1 = 0;
503 gridSegments[j + i].y2 =
504 lineGap + BOARD_HEIGHT * (squareSize + lineGap);
505 gridSegments[j + i].x1 = gridSegments[j + i].x2
506 = lineGap / 2 + (j * (squareSize + lineGap));
513 /* draws a grid starting around Nx, Ny squares starting at x,y */
515 float odd = (lineGap & 1)/2.;
519 cr = cairo_create (csBoardWindow);
521 cairo_set_antialias (cr, CAIRO_ANTIALIAS_NONE);
522 SetPen(cr, lineGap, "#000000", 0);
525 for (i = 0; i < BOARD_WIDTH + BOARD_HEIGHT + 2; i++)
527 int h = (gridSegments[i].y1 == gridSegments[i].y2); // horizontal
528 cairo_move_to (cr, gridSegments[i].x1 + !h*odd, gridSegments[i].y1 + h*odd);
529 cairo_line_to (cr, gridSegments[i].x2 + !h*odd, gridSegments[i].y2 + h*odd);
540 DrawBorder (int x, int y, int type, int odd)
546 case 0: col = "#000000"; break;
547 case 1: col = appData.highlightSquareColor; break;
548 case 2: col = appData.premoveHighlightColor; break;
550 cr = cairo_create(csBoardWindow);
551 cairo_set_antialias(cr, CAIRO_ANTIALIAS_NONE);
552 cairo_rectangle(cr, x+odd/2., y+odd/2., squareSize+lineGap, squareSize+lineGap);
553 SetPen(cr, lineGap, col, 0);
556 GraphExpose(currBoard, x - lineGap/2, y - lineGap/2, squareSize+2*lineGap+odd, squareSize+2*lineGap+odd);
560 CutOutSquare (int x, int y, int *x0, int *y0, int kind)
562 int W = BOARD_WIDTH, H = BOARD_HEIGHT;
563 int nx = x/(squareSize + lineGap), ny = y/(squareSize + lineGap);
565 if(textureW[kind] < squareSize || textureH[kind] < squareSize) return 0;
566 if(textureW[kind] < W*squareSize)
567 *x0 = (textureW[kind] - squareSize) * nx/(W-1);
569 *x0 = textureW[kind]*nx / W + (textureW[kind] - W*squareSize) / (2*W);
570 if(textureH[kind] < H*squareSize)
571 *y0 = (textureH[kind] - squareSize) * ny/(H-1);
573 *y0 = textureH[kind]*ny / H + (textureH[kind] - H*squareSize) / (2*H);
578 DrawLogo (Option *opt, void *logo)
580 cairo_surface_t *img;
584 if(!logo || !opt) return;
585 img = cairo_image_surface_create_from_png (logo);
586 w = cairo_image_surface_get_width (img);
587 h = cairo_image_surface_get_height (img);
588 cr = cairo_create(DRAWABLE(opt));
589 // cairo_scale(cr, (float)appData.logoSize/w, appData.logoSize/(2.*h));
590 cairo_scale(cr, (float)opt->max/w, (float)opt->value/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)
776 c_animBufs[anr+4] = csBoardWindow;
777 cr = cairo_create (c_animBufs[anr+destBuf]);
778 cairo_set_source_surface (cr, c_animBufs[anr+srcBuf], destX - srcX, destY - srcY);
779 cairo_rectangle (cr, destX, destY, width, height);
782 if(c_animBufs[anr+destBuf] == csBoardWindow) // suspect that GTK needs this!
783 GraphExpose(currBoard, destX, destY, width, height);
787 SetDragPiece (AnimNr anr, ChessSquare piece)
791 /* [AS] Arrow highlighting support */
794 DoDrawPolygon (cairo_surface_t *cs, Pnt arrow[], int nr)
798 cr = cairo_create (cs);
799 cairo_move_to (cr, arrow[nr-1].x, arrow[nr-1].y);
801 cairo_line_to(cr, arrow[i].x, arrow[i].y);
803 if(appData.monoMode) { // should we always outline arrow?
804 cairo_line_to(cr, arrow[0].x, arrow[0].y);
805 SetPen(cr, 2, "#000000", 0);
806 cairo_stroke_preserve(cr);
808 SetPen(cr, 2, appData.highlightSquareColor, 0);
816 DrawPolygon (Pnt arrow[], int nr)
818 DoDrawPolygon(csBoardWindow, arrow, nr);
819 // if(!dual) DoDrawPolygon(csBoardBackup, arrow, nr);
822 //-------------------- Eval Graph drawing routines (formerly in xevalgraph.h) --------------------
825 ChoosePen(cairo_t *cr, int i)
829 SetPen(cr, 1.0, "#000000", 0);
832 SetPen(cr, 1.0, "#A0A0A0", 1);
835 SetPen(cr, 1.0, "#0000FF", 1);
838 SetPen(cr, 3.0, crWhite, 0);
841 SetPen(cr, 3.0, crBlack, 0);
844 SetPen(cr, 3.0, "#E0E0F0", 0);
849 // [HGM] front-end, added as wrapper to avoid use of LineTo and MoveToEx in other routines (so they can be back-end)
851 DrawSegment (int x, int y, int *lastX, int *lastY, int penType)
853 static int curX, curY;
855 if(penType != PEN_NONE) {
856 cairo_t *cr = cairo_create(DRAWABLE(disp));
857 cairo_set_antialias (cr, CAIRO_ANTIALIAS_NONE);
858 cairo_move_to (cr, curX, curY);
859 cairo_line_to (cr, x,y);
860 ChoosePen(cr, penType);
865 if(lastX != NULL) { *lastX = curX; *lastY = curY; }
869 // front-end wrapper for drawing functions to do rectangles
871 DrawRectangle (int left, int top, int right, int bottom, int side, int style)
875 cr = cairo_create (DRAWABLE(disp));
876 cairo_set_antialias (cr, CAIRO_ANTIALIAS_NONE);
877 cairo_rectangle (cr, left, top, right-left, bottom-top);
880 case 0: ChoosePen(cr, PEN_BOLDWHITE); break;
881 case 1: ChoosePen(cr, PEN_BOLDBLACK); break;
882 case 2: ChoosePen(cr, PEN_BACKGD); break;
888 cairo_rectangle (cr, left, top, right-left-1, bottom-top-1);
889 ChoosePen(cr, PEN_BLACK);
896 // front-end wrapper for putting text in graph
898 DrawEvalText (char *buf, int cbBuf, int y)
900 // the magic constants 8 and 5 should really be derived from the font size somehow
901 cairo_text_extents_t extents;
902 cairo_t *cr = cairo_create(DRAWABLE(disp));
904 /* GTK-TODO this has to go into the font-selection */
905 cairo_select_font_face (cr, "Sans",
906 CAIRO_FONT_SLANT_NORMAL,
907 CAIRO_FONT_WEIGHT_NORMAL);
908 cairo_set_font_size (cr, 12.0);
911 cairo_text_extents (cr, buf, &extents);
913 cairo_move_to (cr, MarginX - 2 - 8*cbBuf, y+5);
914 cairo_text_path (cr, buf);
915 cairo_set_source_rgb (cr, 0.0, 0.0, 0);
916 cairo_fill_preserve (cr);
917 cairo_set_source_rgb (cr, 0, 1.0, 0);
918 cairo_set_line_width (cr, 0.1);