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];
128 SwitchWindow (int main)
130 currBoard = (main ? &mainOptions[W_BOARD] : &dualOptions[3]);
131 csBoardWindow = DRAWABLE(currBoard);
135 SelectPieces(VariantClass v)
140 for(p=0; p<=(int)WhiteKing; p++)
141 pngPieceBitmaps[i][p] = pngPieceBitmaps2[i][p]; // defaults
142 if(v == VariantShogi) {
143 pngPieceBitmaps[i][(int)WhiteCannon] = pngPieceBitmaps2[i][(int)WhiteTokin];
144 pngPieceBitmaps[i][(int)WhiteNightrider] = pngPieceBitmaps2[i][(int)WhiteKing+2];
145 pngPieceBitmaps[i][(int)WhiteGrasshopper] = pngPieceBitmaps2[i][(int)WhiteKing+3];
146 pngPieceBitmaps[i][(int)WhiteSilver] = pngPieceBitmaps2[i][(int)WhiteKing+4];
147 pngPieceBitmaps[i][(int)WhiteQueen] = pngPieceBitmaps2[i][(int)WhiteLance];
150 if(v == VariantGothic) {
151 pngPieceBitmaps[i][(int)WhiteMarshall] = pngPieceBitmaps2[i][(int)WhiteSilver];
154 if(v == VariantSChess) {
155 pngPieceBitmaps[i][(int)WhiteAngel] = pngPieceBitmaps2[i][(int)WhiteFalcon];
156 pngPieceBitmaps[i][(int)WhiteMarshall] = pngPieceBitmaps2[i][(int)WhiteAlfil];
158 if(v == VariantChu) {
159 pngPieceBitmaps[i][(int)WhiteNightrider] = pngPieceBitmaps2[i][(int)WhiteKing+1];
160 pngPieceBitmaps[i][(int)WhiteUnicorn] = pngPieceBitmaps2[i][(int)WhiteCat];
161 pngPieceBitmaps[i][(int)WhiteSilver] = pngPieceBitmaps2[i][(int)WhiteSword];
162 pngPieceBitmaps[i][(int)WhiteFalcon] = pngPieceBitmaps2[i][(int)WhiteDagger];
167 #define BoardSize int
169 InitDrawingSizes (BoardSize boardSize, int flags)
170 { // [HGM] resize is functional now, but for board format changes only (nr of ranks, files)
171 int boardWidth, boardHeight;
172 static int oldWidth, oldHeight;
173 static VariantClass oldVariant;
174 static int oldTwoBoards = 0;
176 if(!mainOptions[W_BOARD].handle) return;
178 if(oldTwoBoards && !twoBoards) PopDown(DummyDlg);
179 oldTwoBoards = twoBoards;
181 if(appData.overrideLineGap >= 0) lineGap = appData.overrideLineGap;
182 boardWidth = lineGap + BOARD_WIDTH * (squareSize + lineGap);
183 boardHeight = lineGap + BOARD_HEIGHT * (squareSize + lineGap);
185 if(boardWidth != oldWidth || boardHeight != oldHeight) { // do resizing stuff only if size actually changed
187 oldWidth = boardWidth; oldHeight = boardHeight;
191 * Inhibit shell resizing.
193 ResizeBoardWindow(boardWidth, boardHeight, 0);
198 // [HGM] pieces: tailor piece bitmaps to needs of specific variant
201 if(gameInfo.variant != oldVariant) { // and only if variant changed
203 SelectPieces(gameInfo.variant);
205 oldVariant = gameInfo.variant;
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", "Lion",
238 "GoldPawn", "HSword", "PromoHorse", "PromoDragon", "Leopard", "PromoSword", "King", "Queen", "Lion", "PromoRook", "PromoHSword",
239 "Dolphin", "Chancellor", "Unicorn", "Hawk", "Sword", "Princess", "HCrown", "Knight", "Elephant", "PromoBishop", "King",
240 "Claw", "GoldKnight", "GoldLance", "GoldSilver", NULL
244 LoadSVG (char *dir, int color, int piece)
247 RsvgHandle *svg=svgPieces[color][piece];
248 RsvgDimensionData svg_dimensions;
249 GError *svgerror=NULL;
250 cairo_surface_t *img;
253 snprintf(buf, MSG_SIZ, "%s/%s%s.svg", dir, color ? "Black" : "White", pngPieceNames[piece]);
255 if(svg || *dir && (svg = rsvg_handle_new_from_file(buf, &svgerror))) {
257 rsvg_handle_get_dimensions(svg, &svg_dimensions);
258 img = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, squareSize, squareSize);
260 cr = cairo_create(img);
261 cairo_scale(cr, squareSize/(double) svg_dimensions.width, squareSize/(double) svg_dimensions.height);
262 rsvg_handle_render_cairo(svg, cr);
263 if(cairo_surface_status(img) == CAIRO_STATUS_SUCCESS) {
264 if(pngPieceImages[color][piece]) cairo_surface_destroy(pngPieceImages[color][piece]);
265 pngPieceImages[color][piece] = img;
272 g_error_free(svgerror);
277 ScaleOnePiece (int color, int piece)
281 cairo_surface_t *img, *cs;
286 svgPieces[color][piece] = LoadSVG("", color, piece); // this fills pngPieceImages if we had cached svg with bitmap of wanted size
288 if(!pngPieceImages[color][piece]) { // we don't have cached bitmap (implying we did not have cached svg)
289 if(*appData.pieceDirectory) { // user specified piece directory
290 snprintf(buf, MSG_SIZ, "%s/%s%s.png", appData.pieceDirectory, color ? "Black" : "White", pngPieceNames[piece]);
291 img = cairo_image_surface_create_from_png (buf); // try if there are png pieces there
292 if(cairo_surface_status(img) != CAIRO_STATUS_SUCCESS) { // there were not
293 svgPieces[color][piece] = LoadSVG(appData.pieceDirectory, color, piece); // so try if he has svg there
294 } else pngPieceImages[color][piece] = img;
298 if(!pngPieceImages[color][piece]) { // we still did not manage to acquire a piece bitmap
299 static int warned = 0;
300 if(!(svgPieces[color][piece] = LoadSVG(SVGDIR, color, piece)) && !warned) { // try to fall back on installed svg
301 char *msg = _("No default pieces installed!\nSelect your own using '-pieceImageDirectory'.");
302 printf("%s\n", msg); // give up
303 DisplayError(msg, 0);
304 warned = 1; // prevent error message being repeated for each piece type
308 img = pngPieceImages[color][piece];
310 // create new bitmap to hold scaled piece image (and remove any old)
311 if(pngPieceBitmaps2[color][piece]) cairo_surface_destroy (pngPieceBitmaps2[color][piece]);
312 pngPieceBitmaps2[color][piece] = cs = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, squareSize, squareSize);
316 // scaled copying of the raw png image
317 cr = cairo_create(cs);
318 w = cairo_image_surface_get_width (img);
319 h = cairo_image_surface_get_height (img);
320 cairo_scale(cr, squareSize/w, squareSize/h);
321 cairo_set_source_surface (cr, img, 0, 0);
325 if(!appData.trueColors || !*appData.pieceDirectory) { // operate on bitmap to color it (king-size hack...)
326 int stride = cairo_image_surface_get_stride(cs)/4;
327 int *buf = (int *) cairo_image_surface_get_data(cs);
329 sscanf(color ? appData.blackPieceColor+1 : appData.whitePieceColor+1, "%x", &p); // replacement color
330 cairo_surface_flush(cs);
331 for(i=0; i<squareSize; i++) for(j=0; j<squareSize; j++) {
334 unsigned int c = buf[i*stride + j];
335 a = c >> 24; r = c >> 16 & 255; // alpha and red, where red is the 'white' weight, since white is #FFFFCC in the source images
336 f = (color ? a - r : r)/255.; // fraction of black or white in the mix that has to be replaced
337 buf[i*stride + j] = c & 0xFF000000; // alpha channel is kept at same opacity
338 buf[i*stride + j] += ((int)(f*(p&0xFF0000)) & 0xFF0000) + ((int)(f*(p&0xFF00)) & 0xFF00) + (int)(f*(p&0xFF)); // add desired fraction of new color
339 if(color) buf[i*stride + j] += r | r << 8 | r << 16; // details on black pieces get their weight added in pure white
340 if(appData.monoMode) {
341 if(a < 64) buf[i*stride + j] = 0; // if not opaque enough, totally transparent
342 else if(2*r < a) buf[i*stride + j] = 0xFF000000; // if not light enough, totally black
343 else buf[i*stride + j] = 0xFFFFFFFF; // otherwise white
346 cairo_surface_mark_dirty(cs);
355 for(p=0; pngPieceNames[p]; p++) {
359 SelectPieces(gameInfo.variant);
364 { // [HGM] taken out of main
366 CreatePNGBoard(appData.liteBackTextureFile, 1);
367 CreatePNGBoard(appData.darkBackTextureFile, 0);
371 InitDrawingParams (int reloadPieces)
375 for(i=0; i<2; i++) for(p=0; p<BlackPawn+4; p++) {
376 if(pngPieceImages[i][p]) cairo_surface_destroy(pngPieceImages[i][p]);
377 pngPieceImages[i][p] = NULL;
378 if(svgPieces[i][p]) rsvg_handle_close(svgPieces[i][p], NULL);
379 svgPieces[i][p] = NULL;
384 // [HGM] seekgraph: some low-level drawing routines (by JC, mostly)
387 Color (char *col, int n)
390 sscanf(col, "#%x", &c);
396 SetPen (cairo_t *cr, float w, char *col, int dash)
398 static const double dotted[] = {4.0, 4.0};
399 static int len = sizeof(dotted) / sizeof(dotted[0]);
400 cairo_set_line_width (cr, w);
401 cairo_set_source_rgba (cr, Color(col, 4), Color(col, 2), Color(col, 0), 1.0);
402 if(dash) cairo_set_dash (cr, dotted, len, 0.0);
405 void DrawSeekAxis( int x, int y, int xTo, int yTo )
410 cr = cairo_create (csBoardWindow);
412 cairo_move_to (cr, x, y);
413 cairo_line_to(cr, xTo, yTo );
415 SetPen(cr, 2, "#000000", 0);
420 GraphExpose(currBoard, x-1, yTo-1, xTo-x+2, y-yTo+2);
423 void DrawSeekBackground( int left, int top, int right, int bottom )
425 cairo_t *cr = cairo_create (csBoardWindow);
427 cairo_rectangle (cr, left, top, right-left, bottom-top);
429 cairo_set_source_rgba(cr, 0.8, 0.8, 0.4,1.0);
434 GraphExpose(currBoard, left, top, right-left, bottom-top);
437 void DrawSeekText(char *buf, int x, int y)
439 cairo_t *cr = cairo_create (csBoardWindow);
441 cairo_select_font_face (cr, "Sans",
442 CAIRO_FONT_SLANT_NORMAL,
443 CAIRO_FONT_WEIGHT_NORMAL);
445 cairo_set_font_size (cr, 12.0);
447 cairo_move_to (cr, x, y+4);
448 cairo_set_source_rgba(cr, 0, 0, 0,1.0);
449 cairo_show_text( cr, buf);
453 GraphExpose(currBoard, x-5, y-10, 60, 15);
456 void DrawSeekDot(int x, int y, int colorNr)
458 cairo_t *cr = cairo_create (csBoardWindow);
459 int square = colorNr & 0x80;
463 cairo_rectangle (cr, x-squareSize/9, y-squareSize/9, 2*(squareSize/9), 2*(squareSize/9));
465 cairo_arc(cr, x, y, squareSize/9, 0.0, 2*M_PI);
467 SetPen(cr, 2, "#000000", 0);
468 cairo_stroke_preserve(cr);
470 case 0: cairo_set_source_rgba(cr, 1.0, 0, 0,1.0); break;
471 case 1: cairo_set_source_rgba (cr, 0.0, 0.7, 0.2, 1.0); break;
472 default: cairo_set_source_rgba (cr, 1.0, 1.0, 0.0, 1.0); break;
478 GraphExpose(currBoard, x-squareSize/8, y-squareSize/8, 2*(squareSize/8), 2*(squareSize/8));
482 InitDrawingHandle (Option *opt)
484 csBoardWindow = DRAWABLE(opt);
492 if (lineGap == 0) return;
494 /* [HR] Split this into 2 loops for non-square boards. */
496 for (i = 0; i < BOARD_HEIGHT + 1; i++) {
497 gridSegments[i].x1 = 0;
499 lineGap + BOARD_WIDTH * (squareSize + lineGap);
500 gridSegments[i].y1 = gridSegments[i].y2
501 = lineGap / 2 + (i * (squareSize + lineGap));
504 for (j = 0; j < BOARD_WIDTH + 1; j++) {
505 gridSegments[j + i].y1 = 0;
506 gridSegments[j + i].y2 =
507 lineGap + BOARD_HEIGHT * (squareSize + lineGap);
508 gridSegments[j + i].x1 = gridSegments[j + i].x2
509 = lineGap / 2 + (j * (squareSize + lineGap));
516 /* draws a grid starting around Nx, Ny squares starting at x,y */
518 float odd = (lineGap & 1)/2.;
522 cr = cairo_create (csBoardWindow);
524 cairo_set_antialias (cr, CAIRO_ANTIALIAS_NONE);
525 SetPen(cr, lineGap, "#000000", 0);
528 for (i = 0; i < BOARD_WIDTH + BOARD_HEIGHT + 2; i++)
530 int h = (gridSegments[i].y1 == gridSegments[i].y2); // horizontal
531 cairo_move_to (cr, gridSegments[i].x1 + !h*odd, gridSegments[i].y1 + h*odd);
532 cairo_line_to (cr, gridSegments[i].x2 + !h*odd, gridSegments[i].y2 + h*odd);
543 DrawBorder (int x, int y, int type, int odd)
549 case 0: col = "#000000"; break;
550 case 1: col = appData.highlightSquareColor; break;
551 case 2: col = appData.premoveHighlightColor; break;
552 default: col = "#808080"; break; // cannot happen
554 cr = cairo_create(csBoardWindow);
555 cairo_set_antialias(cr, CAIRO_ANTIALIAS_NONE);
556 cairo_rectangle(cr, x+odd/2., y+odd/2., squareSize+lineGap, squareSize+lineGap);
557 SetPen(cr, lineGap, col, 0);
560 GraphExpose(currBoard, x - lineGap/2, y - lineGap/2, squareSize+2*lineGap+odd, squareSize+2*lineGap+odd);
564 CutOutSquare (int x, int y, int *x0, int *y0, int kind)
566 int W = BOARD_WIDTH, H = BOARD_HEIGHT;
567 int nx = x/(squareSize + lineGap), ny = y/(squareSize + lineGap);
569 if(textureW[kind] < squareSize || textureH[kind] < squareSize) return 0;
570 if(textureW[kind] < W*squareSize)
571 *x0 = (textureW[kind] - squareSize) * nx/(W-1);
573 *x0 = textureW[kind]*nx / W + (textureW[kind] - W*squareSize) / (2*W);
574 if(textureH[kind] < H*squareSize)
575 *y0 = (textureH[kind] - squareSize) * ny/(H-1);
577 *y0 = textureH[kind]*ny / H + (textureH[kind] - H*squareSize) / (2*H);
582 DrawLogo (Option *opt, void *logo)
584 cairo_surface_t *img;
588 if(!logo || !opt) return;
589 img = cairo_image_surface_create_from_png (logo);
590 w = cairo_image_surface_get_width (img);
591 h = cairo_image_surface_get_height (img);
592 cr = cairo_create(DRAWABLE(opt));
593 // cairo_scale(cr, (float)appData.logoSize/w, appData.logoSize/(2.*h));
594 cairo_scale(cr, (float)opt->max/w, (float)opt->value/h);
595 cairo_set_source_surface (cr, img, 0, 0);
598 cairo_surface_destroy (img);
599 GraphExpose(opt, 0, 0, appData.logoSize, appData.logoSize/2);
603 BlankSquare (cairo_surface_t *dest, int x, int y, int color, ChessSquare piece, int fac)
604 { // [HGM] extra param 'fac' for forcing destination to (0,0) for copying to animation buffer
608 cr = cairo_create (dest);
610 if ((useTexture & color+1) && CutOutSquare(x, y, &x0, &y0, color)) {
611 cairo_set_source_surface (cr, pngBoardBitmap[color], x*fac - x0, y*fac - y0);
612 cairo_set_antialias (cr, CAIRO_ANTIALIAS_NONE);
613 cairo_rectangle (cr, x*fac, y*fac, squareSize, squareSize);
616 } else { // evenly colored squares
619 case 0: col = appData.darkSquareColor; break;
620 case 1: col = appData.lightSquareColor; break;
621 case 2: col = "#000000"; break;
622 default: col = "#808080"; break; // cannot happen
624 SetPen(cr, 2.0, col, 0);
625 cairo_rectangle (cr, fac*x, fac*y, squareSize, squareSize);
626 cairo_set_antialias (cr, CAIRO_ANTIALIAS_NONE);
633 pngDrawPiece (cairo_surface_t *dest, ChessSquare piece, int square_color, int x, int y)
638 if ((int)piece < (int) BlackPawn) {
644 if(appData.upsideDown && flipView) kind = 1 - kind; // swap white and black pieces
645 BlankSquare(dest, x, y, square_color, piece, 1); // erase previous contents with background
646 cr = cairo_create (dest);
647 cairo_set_source_surface (cr, pngPieceBitmaps[kind][piece], x, y);
652 static char *markerColor[8] = { "#FFFF00", "#FF0000", "#00FF00", "#0000FF", "#00FFFF", "#FF00FF", "#FFFFFF", "#000000" };
655 DoDrawDot (cairo_surface_t *cs, int marker, int x, int y, int r)
659 cr = cairo_create(cs);
660 cairo_arc(cr, x+r/2, y+r/2, r/2, 0.0, 2*M_PI);
661 if(appData.monoMode) {
662 SetPen(cr, 2, marker == 2 ? "#000000" : "#FFFFFF", 0);
663 cairo_stroke_preserve(cr);
664 SetPen(cr, 2, marker == 2 ? "#FFFFFF" : "#000000", 0);
666 SetPen(cr, 2, markerColor[marker-1], 0);
674 DrawDot (int marker, int x, int y, int r)
675 { // used for atomic captures; no need to draw on backup
676 DoDrawDot(csBoardWindow, marker, x, y, r);
677 GraphExpose(currBoard, x-r, y-r, 2*r, 2*r);
681 DrawText (char *string, int x, int y, int align)
684 cairo_text_extents_t te;
687 cr = cairo_create (csBoardWindow);
688 cairo_select_font_face (cr, "Sans",
689 CAIRO_FONT_SLANT_NORMAL,
690 CAIRO_FONT_WEIGHT_BOLD);
692 cairo_set_font_size (cr, squareSize/4);
693 // calculate where it goes
694 cairo_text_extents (cr, string, &te);
697 xx += squareSize - te.width - te.x_bearing - 1;
698 yy += squareSize - te.height - te.y_bearing - 1;
699 } else if (align == 2) {
700 xx += te.x_bearing + 1, yy += -te.y_bearing + 1;
701 } else if (align == 3) {
702 xx += squareSize - te.width -te.x_bearing - 1;
703 yy += -te.y_bearing + 3;
704 } else if (align == 4) {
705 xx += te.x_bearing + 1, yy += -te.y_bearing + 3;
708 cairo_move_to (cr, xx-1, yy);
709 if(align < 3) cairo_set_source_rgb (cr, 0.0, 0.0, 0.0);
710 else cairo_set_source_rgb (cr, 1.0, 1.0, 1.0);
711 cairo_show_text (cr, string);
716 DrawOneSquare (int x, int y, ChessSquare piece, int square_color, int marker, char *tString, char *bString, int align)
717 { // basic front-end board-draw function: takes care of everything that can be in square:
718 // piece, background, coordinate/count, marker dot
720 if (piece == EmptySquare) {
721 BlankSquare(csBoardWindow, x, y, square_color, piece, 1);
723 pngDrawPiece(csBoardWindow, piece, square_color, x, y);
726 if(align) { // square carries inscription (coord or piece count)
727 if(align > 1) DrawText(tString, x, y, align); // top (rank or count)
728 if(bString && *bString) DrawText(bString, x, y, 1); // bottom (always lower right file ID)
731 if(marker) { // print fat marker dot, if requested
732 DoDrawDot(csBoardWindow, marker, x + squareSize/4, y+squareSize/4, squareSize/2);
736 /**** Animation code by Hugh Fisher, DCS, ANU. ****/
738 /* Masks for XPM pieces. Black and white pieces can have
739 different shapes, but in the interest of retaining my
740 sanity pieces must have the same outline on both light
741 and dark squares, and all pieces must use the same
742 background square colors/images. */
744 static cairo_surface_t *c_animBufs[3*NrOfAnims]; // newBuf, saveBuf
747 InitAnimState (AnimNr anr)
749 if(c_animBufs[anr]) cairo_surface_destroy (c_animBufs[anr]);
750 if(c_animBufs[anr+2]) cairo_surface_destroy (c_animBufs[anr+2]);
751 c_animBufs[anr+4] = csBoardWindow;
752 c_animBufs[anr+2] = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, squareSize, squareSize);
753 c_animBufs[anr] = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, squareSize, squareSize);
760 InitAnimState(Player);
764 CairoOverlayPiece (ChessSquare piece, cairo_surface_t *dest)
766 static cairo_t *pieceSource;
767 pieceSource = cairo_create (dest);
768 cairo_set_source_surface (pieceSource, pngPieceBitmaps[!White(piece)][piece % BlackPawn], 0, 0);
769 if(doubleClick) cairo_paint_with_alpha (pieceSource, 0.6);
770 else cairo_paint(pieceSource);
771 cairo_destroy (pieceSource);
775 InsertPiece (AnimNr anr, ChessSquare piece)
777 CairoOverlayPiece(piece, c_animBufs[anr]);
781 DrawBlank (AnimNr anr, int x, int y, int startColor)
783 BlankSquare(c_animBufs[anr+2], x, y, startColor, EmptySquare, 0);
786 void CopyRectangle (AnimNr anr, int srcBuf, int destBuf,
787 int srcX, int srcY, int width, int height, int destX, int destY)
790 c_animBufs[anr+4] = csBoardWindow;
791 cr = cairo_create (c_animBufs[anr+destBuf]);
792 cairo_set_source_surface (cr, c_animBufs[anr+srcBuf], destX - srcX, destY - srcY);
793 cairo_rectangle (cr, destX, destY, width, height);
796 if(c_animBufs[anr+destBuf] == csBoardWindow) // suspect that GTK needs this!
797 GraphExpose(currBoard, destX, destY, width, height);
801 SetDragPiece (AnimNr anr, ChessSquare piece)
805 /* [AS] Arrow highlighting support */
808 DoDrawPolygon (cairo_surface_t *cs, Pnt arrow[], int nr)
812 cr = cairo_create (cs);
813 cairo_move_to (cr, arrow[nr-1].x, arrow[nr-1].y);
815 cairo_line_to(cr, arrow[i].x, arrow[i].y);
817 if(appData.monoMode) { // should we always outline arrow?
818 cairo_line_to(cr, arrow[0].x, arrow[0].y);
819 SetPen(cr, 2, "#000000", 0);
820 cairo_stroke_preserve(cr);
822 SetPen(cr, 2, appData.highlightSquareColor, 0);
830 DrawPolygon (Pnt arrow[], int nr)
832 DoDrawPolygon(csBoardWindow, arrow, nr);
833 // if(!dual) DoDrawPolygon(csBoardBackup, arrow, nr);
836 //-------------------- Eval Graph drawing routines (formerly in xevalgraph.h) --------------------
839 ChoosePen(cairo_t *cr, int i)
843 SetPen(cr, 1.0, "#000000", 0);
846 SetPen(cr, 1.0, "#A0A0A0", 1);
849 SetPen(cr, 1.0, "#0000FF", 1);
852 SetPen(cr, 3.0, crWhite, 0);
855 SetPen(cr, 3.0, crBlack, 0);
858 SetPen(cr, 3.0, "#E0E0F0", 0);
863 // [HGM] front-end, added as wrapper to avoid use of LineTo and MoveToEx in other routines (so they can be back-end)
865 DrawSegment (int x, int y, int *lastX, int *lastY, int penType)
867 static int curX, curY;
869 if(penType != PEN_NONE) {
870 cairo_t *cr = cairo_create(DRAWABLE(disp));
871 cairo_set_antialias (cr, CAIRO_ANTIALIAS_NONE);
872 cairo_move_to (cr, curX, curY);
873 cairo_line_to (cr, x,y);
874 ChoosePen(cr, penType);
879 if(lastX != NULL) { *lastX = curX; *lastY = curY; }
883 // front-end wrapper for drawing functions to do rectangles
885 DrawRectangle (int left, int top, int right, int bottom, int side, int style)
889 cr = cairo_create (DRAWABLE(disp));
890 cairo_set_antialias (cr, CAIRO_ANTIALIAS_NONE);
891 cairo_rectangle (cr, left, top, right-left, bottom-top);
894 case 0: ChoosePen(cr, PEN_BOLDWHITE); break;
895 case 1: ChoosePen(cr, PEN_BOLDBLACK); break;
896 case 2: ChoosePen(cr, PEN_BACKGD); break;
902 cairo_rectangle (cr, left, top, right-left-1, bottom-top-1);
903 ChoosePen(cr, PEN_BLACK);
910 // front-end wrapper for putting text in graph
912 DrawEvalText (char *buf, int cbBuf, int y)
914 // the magic constants 8 and 5 should really be derived from the font size somehow
915 cairo_text_extents_t extents;
916 cairo_t *cr = cairo_create(DRAWABLE(disp));
918 /* GTK-TODO this has to go into the font-selection */
919 cairo_select_font_face (cr, "Sans",
920 CAIRO_FONT_SLANT_NORMAL,
921 CAIRO_FONT_WEIGHT_NORMAL);
922 cairo_set_font_size (cr, 12.0);
925 cairo_text_extents (cr, buf, &extents);
927 cairo_move_to (cr, MarginX - 2 - 8*cbBuf, y+5);
928 cairo_text_path (cr, buf);
929 cairo_set_source_rgb (cr, 0.0, 0.0, 0);
930 cairo_fill_preserve (cr);
931 cairo_set_source_rgb (cr, 0, 1.0, 0);
932 cairo_set_line_width (cr, 0.1);