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];
148 pngPieceBitmaps[i][(int)WhiteFalcon] = pngPieceBitmaps2[i][(int)WhiteKing]; // for Sho Shogi
151 if(v == VariantGothic) {
152 pngPieceBitmaps[i][(int)WhiteMarshall] = pngPieceBitmaps2[i][(int)WhiteSilver];
155 if(v == VariantSChess) {
156 pngPieceBitmaps[i][(int)WhiteAngel] = pngPieceBitmaps2[i][(int)WhiteFalcon];
157 pngPieceBitmaps[i][(int)WhiteMarshall] = pngPieceBitmaps2[i][(int)WhiteAlfil];
159 if(v == VariantChuChess) {
160 pngPieceBitmaps[i][(int)WhiteNightrider] = pngPieceBitmaps2[i][(int)WhiteLion];
162 if(v == VariantChu) {
163 pngPieceBitmaps[i][(int)WhiteNightrider] = pngPieceBitmaps2[i][(int)WhiteKing+1];
164 pngPieceBitmaps[i][(int)WhiteUnicorn] = pngPieceBitmaps2[i][(int)WhiteCat];
165 pngPieceBitmaps[i][(int)WhiteSilver] = pngPieceBitmaps2[i][(int)WhiteSword];
166 pngPieceBitmaps[i][(int)WhiteFalcon] = pngPieceBitmaps2[i][(int)WhiteDagger];
171 #define BoardSize int
173 InitDrawingSizes (BoardSize boardSize, int flags)
174 { // [HGM] resize is functional now, but for board format changes only (nr of ranks, files)
175 int boardWidth, boardHeight;
176 static int oldWidth, oldHeight;
177 static VariantClass oldVariant;
178 static int oldTwoBoards = 0;
180 if(!mainOptions[W_BOARD].handle) return;
182 if(oldTwoBoards && !twoBoards) PopDown(DummyDlg);
183 oldTwoBoards = twoBoards;
185 if(appData.overrideLineGap >= 0) lineGap = appData.overrideLineGap;
186 boardWidth = lineGap + BOARD_WIDTH * (squareSize + lineGap);
187 boardHeight = lineGap + BOARD_HEIGHT * (squareSize + lineGap);
189 if(boardWidth != oldWidth || boardHeight != oldHeight) { // do resizing stuff only if size actually changed
191 oldWidth = boardWidth; oldHeight = boardHeight;
195 * Inhibit shell resizing.
197 ResizeBoardWindow(boardWidth, boardHeight, 0);
202 // [HGM] pieces: tailor piece bitmaps to needs of specific variant
205 if(gameInfo.variant != oldVariant) { // and only if variant changed
207 SelectPieces(gameInfo.variant);
209 oldVariant = gameInfo.variant;
215 ExposeRedraw (Option *graph, int x, int y, int w, int h)
216 { // copy a selected part of the buffer bitmap to the display
217 cairo_t *cr = cairo_create((cairo_surface_t *) graph->textValue);
218 cairo_set_source_surface(cr, (cairo_surface_t *) graph->choice, 0, 0);
219 cairo_set_antialias(cr, CAIRO_ANTIALIAS_NONE);
220 cairo_rectangle(cr, x, y, w, h);
226 CreatePNGBoard (char *s, int kind)
228 if(!appData.useBitmaps || s == NULL || *s == 0 || *s == '*') { useTexture &= ~(kind+1); return; }
229 if(strstr(s, ".png")) {
230 cairo_surface_t *img = cairo_image_surface_create_from_png (s);
232 useTexture |= kind + 1; pngBoardBitmap[kind] = img;
233 textureW[kind] = cairo_image_surface_get_width (img);
234 textureH[kind] = cairo_image_surface_get_height (img);
239 char *pngPieceNames[] = // must be in same order as internal piece encoding
240 { "Pawn", "Knight", "Bishop", "Rook", "Queen", "Advisor", "Elephant", "Archbishop", "Marshall", "Gold", "Commoner",
241 "Canon", "Nightrider", "CrownedBishop", "CrownedRook", "Princess", "Chancellor", "Hawk", "Lance", "Cobra", "Unicorn", "Lion",
242 "GoldPawn", "HSword", "PromoHorse", "PromoDragon", "Leopard", "PromoSword", "King", "Queen", "Lion", "PromoRook", "PromoHSword",
243 "Dolphin", "Chancellor", "Unicorn", "Hawk", "Sword", "Princess", "HCrown", "Knight", "Elephant", "PromoBishop", "King",
244 "Claw", "GoldKnight", "GoldLance", "GoldSilver", NULL
248 LoadSVG (char *dir, int color, int piece)
251 RsvgHandle *svg=svgPieces[color][piece];
252 RsvgDimensionData svg_dimensions;
253 GError *svgerror=NULL;
254 cairo_surface_t *img;
257 snprintf(buf, MSG_SIZ, "%s/%s%s.svg", dir, color ? "Black" : "White", pngPieceNames[piece]);
259 if(svg || *dir && (svg = rsvg_handle_new_from_file(buf, &svgerror))) {
261 rsvg_handle_get_dimensions(svg, &svg_dimensions);
262 img = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, squareSize, squareSize);
264 cr = cairo_create(img);
265 cairo_scale(cr, squareSize/(double) svg_dimensions.width, squareSize/(double) svg_dimensions.height);
266 rsvg_handle_render_cairo(svg, cr);
267 if(cairo_surface_status(img) == CAIRO_STATUS_SUCCESS) {
268 if(pngPieceImages[color][piece]) cairo_surface_destroy(pngPieceImages[color][piece]);
269 pngPieceImages[color][piece] = img;
276 g_error_free(svgerror);
281 ScaleOnePiece (int color, int piece)
285 cairo_surface_t *img, *cs;
290 svgPieces[color][piece] = LoadSVG("", color, piece); // this fills pngPieceImages if we had cached svg with bitmap of wanted size
292 if(!pngPieceImages[color][piece]) { // we don't have cached bitmap (implying we did not have cached svg)
293 if(*appData.pieceDirectory) { // user specified piece directory
294 snprintf(buf, MSG_SIZ, "%s/%s%s.png", appData.pieceDirectory, color ? "Black" : "White", pngPieceNames[piece]);
295 img = cairo_image_surface_create_from_png (buf); // try if there are png pieces there
296 if(cairo_surface_status(img) != CAIRO_STATUS_SUCCESS) { // there were not
297 svgPieces[color][piece] = LoadSVG(appData.pieceDirectory, color, piece); // so try if he has svg there
298 } else pngPieceImages[color][piece] = img;
302 if(!pngPieceImages[color][piece]) { // we still did not manage to acquire a piece bitmap
303 static int warned = 0;
304 if(!(svgPieces[color][piece] = LoadSVG(SVGDIR, color, piece)) && !warned) { // try to fall back on installed svg
305 char *msg = _("No default pieces installed!\nSelect your own using '-pieceImageDirectory'.");
306 printf("%s\n", msg); // give up
307 DisplayError(msg, 0);
308 warned = 1; // prevent error message being repeated for each piece type
312 img = pngPieceImages[color][piece];
314 // create new bitmap to hold scaled piece image (and remove any old)
315 if(pngPieceBitmaps2[color][piece]) cairo_surface_destroy (pngPieceBitmaps2[color][piece]);
316 pngPieceBitmaps2[color][piece] = cs = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, squareSize, squareSize);
320 // scaled copying of the raw png image
321 cr = cairo_create(cs);
322 w = cairo_image_surface_get_width (img);
323 h = cairo_image_surface_get_height (img);
324 cairo_scale(cr, squareSize/w, squareSize/h);
325 cairo_set_source_surface (cr, img, 0, 0);
329 if(!appData.trueColors || !*appData.pieceDirectory) { // operate on bitmap to color it (king-size hack...)
330 int stride = cairo_image_surface_get_stride(cs)/4;
331 int *buf = (int *) cairo_image_surface_get_data(cs);
333 sscanf(color ? appData.blackPieceColor+1 : appData.whitePieceColor+1, "%x", &p); // replacement color
334 cairo_surface_flush(cs);
335 for(i=0; i<squareSize; i++) for(j=0; j<squareSize; j++) {
338 unsigned int c = buf[i*stride + j];
339 a = c >> 24; r = c >> 16 & 255; // alpha and red, where red is the 'white' weight, since white is #FFFFCC in the source images
340 f = (color ? a - r : r)/255.; // fraction of black or white in the mix that has to be replaced
341 buf[i*stride + j] = c & 0xFF000000; // alpha channel is kept at same opacity
342 buf[i*stride + j] += ((int)(f*(p&0xFF0000)) & 0xFF0000) + ((int)(f*(p&0xFF00)) & 0xFF00) + (int)(f*(p&0xFF)); // add desired fraction of new color
343 if(color) buf[i*stride + j] += r | r << 8 | r << 16; // details on black pieces get their weight added in pure white
344 if(appData.monoMode) {
345 if(a < 64) buf[i*stride + j] = 0; // if not opaque enough, totally transparent
346 else if(2*r < a) buf[i*stride + j] = 0xFF000000; // if not light enough, totally black
347 else buf[i*stride + j] = 0xFFFFFFFF; // otherwise white
350 cairo_surface_mark_dirty(cs);
359 for(p=0; pngPieceNames[p]; p++) {
363 SelectPieces(gameInfo.variant);
368 { // [HGM] taken out of main
370 CreatePNGBoard(appData.liteBackTextureFile, 1);
371 CreatePNGBoard(appData.darkBackTextureFile, 0);
375 InitDrawingParams (int reloadPieces)
379 for(i=0; i<2; i++) for(p=0; p<BlackPawn+4; p++) {
380 if(pngPieceImages[i][p]) cairo_surface_destroy(pngPieceImages[i][p]);
381 pngPieceImages[i][p] = NULL;
382 if(svgPieces[i][p]) rsvg_handle_close(svgPieces[i][p], NULL);
383 svgPieces[i][p] = NULL;
388 // [HGM] seekgraph: some low-level drawing routines (by JC, mostly)
391 Color (char *col, int n)
394 sscanf(col, "#%x", &c);
400 SetPen (cairo_t *cr, float w, char *col, int dash)
402 static const double dotted[] = {4.0, 4.0};
403 static int len = sizeof(dotted) / sizeof(dotted[0]);
404 cairo_set_line_width (cr, w);
405 cairo_set_source_rgba (cr, Color(col, 4), Color(col, 2), Color(col, 0), 1.0);
406 if(dash) cairo_set_dash (cr, dotted, len, 0.0);
409 void DrawSeekAxis( int x, int y, int xTo, int yTo )
414 cr = cairo_create (csBoardWindow);
416 cairo_move_to (cr, x, y);
417 cairo_line_to(cr, xTo, yTo );
419 SetPen(cr, 2, "#000000", 0);
424 GraphExpose(currBoard, x-1, yTo-1, xTo-x+2, y-yTo+2);
427 void DrawSeekBackground( int left, int top, int right, int bottom )
429 cairo_t *cr = cairo_create (csBoardWindow);
431 cairo_rectangle (cr, left, top, right-left, bottom-top);
433 cairo_set_source_rgba(cr, 0.8, 0.8, 0.4,1.0);
438 GraphExpose(currBoard, left, top, right-left, bottom-top);
441 void DrawSeekText(char *buf, int x, int y)
443 cairo_t *cr = cairo_create (csBoardWindow);
445 cairo_select_font_face (cr, "Sans",
446 CAIRO_FONT_SLANT_NORMAL,
447 CAIRO_FONT_WEIGHT_NORMAL);
449 cairo_set_font_size (cr, 12.0);
451 cairo_move_to (cr, x, y+4);
452 cairo_set_source_rgba(cr, 0, 0, 0,1.0);
453 cairo_show_text( cr, buf);
457 GraphExpose(currBoard, x-5, y-10, 60, 15);
460 void DrawSeekDot(int x, int y, int colorNr)
462 cairo_t *cr = cairo_create (csBoardWindow);
463 int square = colorNr & 0x80;
467 cairo_rectangle (cr, x-squareSize/9, y-squareSize/9, 2*(squareSize/9), 2*(squareSize/9));
469 cairo_arc(cr, x, y, squareSize/9, 0.0, 2*M_PI);
471 SetPen(cr, 2, "#000000", 0);
472 cairo_stroke_preserve(cr);
474 case 0: cairo_set_source_rgba(cr, 1.0, 0, 0,1.0); break;
475 case 1: cairo_set_source_rgba (cr, 0.0, 0.7, 0.2, 1.0); break;
476 default: cairo_set_source_rgba (cr, 1.0, 1.0, 0.0, 1.0); break;
482 GraphExpose(currBoard, x-squareSize/8, y-squareSize/8, 2*(squareSize/8), 2*(squareSize/8));
486 InitDrawingHandle (Option *opt)
488 csBoardWindow = DRAWABLE(opt);
496 if (lineGap == 0) return;
498 /* [HR] Split this into 2 loops for non-square boards. */
500 for (i = 0; i < BOARD_HEIGHT + 1; i++) {
501 gridSegments[i].x1 = 0;
503 lineGap + BOARD_WIDTH * (squareSize + lineGap);
504 gridSegments[i].y1 = gridSegments[i].y2
505 = lineGap / 2 + (i * (squareSize + lineGap));
508 for (j = 0; j < BOARD_WIDTH + 1; j++) {
509 gridSegments[j + i].y1 = 0;
510 gridSegments[j + i].y2 =
511 lineGap + BOARD_HEIGHT * (squareSize + lineGap);
512 gridSegments[j + i].x1 = gridSegments[j + i].x2
513 = lineGap / 2 + (j * (squareSize + lineGap));
520 /* draws a grid starting around Nx, Ny squares starting at x,y */
522 float odd = (lineGap & 1)/2.;
526 cr = cairo_create (csBoardWindow);
528 cairo_set_antialias (cr, CAIRO_ANTIALIAS_NONE);
529 SetPen(cr, lineGap, "#000000", 0);
532 for (i = 0; i < BOARD_WIDTH + BOARD_HEIGHT + 2; i++)
534 int h = (gridSegments[i].y1 == gridSegments[i].y2); // horizontal
535 cairo_move_to (cr, gridSegments[i].x1 + !h*odd, gridSegments[i].y1 + h*odd);
536 cairo_line_to (cr, gridSegments[i].x2 + !h*odd, gridSegments[i].y2 + h*odd);
547 DrawBorder (int x, int y, int type, int odd)
553 case 0: col = "#000000"; break;
554 case 1: col = appData.highlightSquareColor; break;
555 case 2: col = appData.premoveHighlightColor; break;
556 default: col = "#808080"; break; // cannot happen
558 cr = cairo_create(csBoardWindow);
559 cairo_set_antialias(cr, CAIRO_ANTIALIAS_NONE);
560 cairo_rectangle(cr, x+odd/2., y+odd/2., squareSize+lineGap, squareSize+lineGap);
561 SetPen(cr, lineGap, col, 0);
564 GraphExpose(currBoard, x - lineGap/2, y - lineGap/2, squareSize+2*lineGap+odd, squareSize+2*lineGap+odd);
568 CutOutSquare (int x, int y, int *x0, int *y0, int kind)
570 int W = BOARD_WIDTH, H = BOARD_HEIGHT;
571 int nx = x/(squareSize + lineGap), ny = y/(squareSize + lineGap);
573 if(textureW[kind] < squareSize || textureH[kind] < squareSize) return 0;
574 if(textureW[kind] < W*squareSize)
575 *x0 = (textureW[kind] - squareSize) * nx/(W-1);
577 *x0 = textureW[kind]*nx / W + (textureW[kind] - W*squareSize) / (2*W);
578 if(textureH[kind] < H*squareSize)
579 *y0 = (textureH[kind] - squareSize) * ny/(H-1);
581 *y0 = textureH[kind]*ny / H + (textureH[kind] - H*squareSize) / (2*H);
586 DrawLogo (Option *opt, void *logo)
588 cairo_surface_t *img;
592 if(!logo || !opt) return;
593 img = cairo_image_surface_create_from_png (logo);
594 w = cairo_image_surface_get_width (img);
595 h = cairo_image_surface_get_height (img);
596 cr = cairo_create(DRAWABLE(opt));
597 // cairo_scale(cr, (float)appData.logoSize/w, appData.logoSize/(2.*h));
598 cairo_scale(cr, (float)opt->max/w, (float)opt->value/h);
599 cairo_set_source_surface (cr, img, 0, 0);
602 cairo_surface_destroy (img);
603 GraphExpose(opt, 0, 0, appData.logoSize, appData.logoSize/2);
607 BlankSquare (cairo_surface_t *dest, int x, int y, int color, ChessSquare piece, int fac)
608 { // [HGM] extra param 'fac' for forcing destination to (0,0) for copying to animation buffer
612 cr = cairo_create (dest);
614 if ((useTexture & color+1) && CutOutSquare(x, y, &x0, &y0, color)) {
615 cairo_set_source_surface (cr, pngBoardBitmap[color], x*fac - x0, y*fac - y0);
616 cairo_set_antialias (cr, CAIRO_ANTIALIAS_NONE);
617 cairo_rectangle (cr, x*fac, y*fac, squareSize, squareSize);
620 } else { // evenly colored squares
623 case 0: col = appData.darkSquareColor; break;
624 case 1: col = appData.lightSquareColor; break;
625 case 2: col = "#000000"; break;
626 default: col = "#808080"; break; // cannot happen
628 SetPen(cr, 2.0, col, 0);
629 cairo_rectangle (cr, fac*x, fac*y, squareSize, squareSize);
630 cairo_set_antialias (cr, CAIRO_ANTIALIAS_NONE);
637 pngDrawPiece (cairo_surface_t *dest, ChessSquare piece, int square_color, int x, int y)
642 if ((int)piece < (int) BlackPawn) {
648 if(appData.upsideDown && flipView) kind = 1 - kind; // swap white and black pieces
649 BlankSquare(dest, x, y, square_color, piece, 1); // erase previous contents with background
650 cr = cairo_create (dest);
651 cairo_set_source_surface (cr, pngPieceBitmaps[kind][piece], x, y);
656 static char *markerColor[8] = { "#FFFF00", "#FF0000", "#00FF00", "#0000FF", "#00FFFF", "#FF00FF", "#FFFFFF", "#000000" };
659 DoDrawDot (cairo_surface_t *cs, int marker, int x, int y, int r)
663 cr = cairo_create(cs);
664 cairo_arc(cr, x+r/2, y+r/2, r/2, 0.0, 2*M_PI);
665 if(appData.monoMode) {
666 SetPen(cr, 2, marker == 2 ? "#000000" : "#FFFFFF", 0);
667 cairo_stroke_preserve(cr);
668 SetPen(cr, 2, marker == 2 ? "#FFFFFF" : "#000000", 0);
670 SetPen(cr, 2, markerColor[marker-1], 0);
678 DrawDot (int marker, int x, int y, int r)
679 { // used for atomic captures; no need to draw on backup
680 DoDrawDot(csBoardWindow, marker, x, y, r);
681 GraphExpose(currBoard, x-r, y-r, 2*r, 2*r);
685 DrawText (char *string, int x, int y, int align)
688 cairo_text_extents_t te;
691 cr = cairo_create (csBoardWindow);
692 cairo_select_font_face (cr, "Sans",
693 CAIRO_FONT_SLANT_NORMAL,
694 CAIRO_FONT_WEIGHT_BOLD);
696 cairo_set_font_size (cr, squareSize/4);
697 // calculate where it goes
698 cairo_text_extents (cr, string, &te);
701 xx += squareSize - te.width - te.x_bearing - 1;
702 yy += squareSize - te.height - te.y_bearing - 1;
703 } else if (align == 2) {
704 xx += te.x_bearing + 1, yy += -te.y_bearing + 1;
705 } else if (align == 3) {
706 xx += squareSize - te.width -te.x_bearing - 1;
707 yy += -te.y_bearing + 3;
708 } else if (align == 4) {
709 xx += te.x_bearing + 1, yy += -te.y_bearing + 3;
712 cairo_move_to (cr, xx-1, yy);
713 if(align < 3) cairo_set_source_rgb (cr, 0.0, 0.0, 0.0);
714 else cairo_set_source_rgb (cr, 1.0, 1.0, 1.0);
715 cairo_show_text (cr, string);
720 DrawOneSquare (int x, int y, ChessSquare piece, int square_color, int marker, char *tString, char *bString, int align)
721 { // basic front-end board-draw function: takes care of everything that can be in square:
722 // piece, background, coordinate/count, marker dot
724 if (piece == EmptySquare) {
725 BlankSquare(csBoardWindow, x, y, square_color, piece, 1);
727 pngDrawPiece(csBoardWindow, piece, square_color, x, y);
730 if(align) { // square carries inscription (coord or piece count)
731 if(align > 1) DrawText(tString, x, y, align); // top (rank or count)
732 if(bString && *bString) DrawText(bString, x, y, 1); // bottom (always lower right file ID)
735 if(marker) { // print fat marker dot, if requested
736 DoDrawDot(csBoardWindow, marker, x + squareSize/4, y+squareSize/4, squareSize/2);
740 /**** Animation code by Hugh Fisher, DCS, ANU. ****/
742 /* Masks for XPM pieces. Black and white pieces can have
743 different shapes, but in the interest of retaining my
744 sanity pieces must have the same outline on both light
745 and dark squares, and all pieces must use the same
746 background square colors/images. */
748 static cairo_surface_t *c_animBufs[3*NrOfAnims]; // newBuf, saveBuf
751 InitAnimState (AnimNr anr)
753 if(c_animBufs[anr]) cairo_surface_destroy (c_animBufs[anr]);
754 if(c_animBufs[anr+2]) cairo_surface_destroy (c_animBufs[anr+2]);
755 c_animBufs[anr+4] = csBoardWindow;
756 c_animBufs[anr+2] = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, squareSize, squareSize);
757 c_animBufs[anr] = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, squareSize, squareSize);
764 InitAnimState(Player);
768 CairoOverlayPiece (ChessSquare piece, cairo_surface_t *dest)
770 static cairo_t *pieceSource;
771 pieceSource = cairo_create (dest);
772 cairo_set_source_surface (pieceSource, pngPieceBitmaps[!White(piece)][piece % BlackPawn], 0, 0);
773 if(doubleClick) cairo_paint_with_alpha (pieceSource, 0.6);
774 else cairo_paint(pieceSource);
775 cairo_destroy (pieceSource);
779 InsertPiece (AnimNr anr, ChessSquare piece)
781 CairoOverlayPiece(piece, c_animBufs[anr]);
785 DrawBlank (AnimNr anr, int x, int y, int startColor)
787 BlankSquare(c_animBufs[anr+2], x, y, startColor, EmptySquare, 0);
790 void CopyRectangle (AnimNr anr, int srcBuf, int destBuf,
791 int srcX, int srcY, int width, int height, int destX, int destY)
794 c_animBufs[anr+4] = csBoardWindow;
795 cr = cairo_create (c_animBufs[anr+destBuf]);
796 cairo_set_source_surface (cr, c_animBufs[anr+srcBuf], destX - srcX, destY - srcY);
797 cairo_rectangle (cr, destX, destY, width, height);
800 if(c_animBufs[anr+destBuf] == csBoardWindow) // suspect that GTK needs this!
801 GraphExpose(currBoard, destX, destY, width, height);
805 SetDragPiece (AnimNr anr, ChessSquare piece)
809 /* [AS] Arrow highlighting support */
812 DoDrawPolygon (cairo_surface_t *cs, Pnt arrow[], int nr)
816 cr = cairo_create (cs);
817 cairo_move_to (cr, arrow[nr-1].x, arrow[nr-1].y);
819 cairo_line_to(cr, arrow[i].x, arrow[i].y);
821 if(appData.monoMode) { // should we always outline arrow?
822 cairo_line_to(cr, arrow[0].x, arrow[0].y);
823 SetPen(cr, 2, "#000000", 0);
824 cairo_stroke_preserve(cr);
826 SetPen(cr, 2, appData.highlightSquareColor, 0);
834 DrawPolygon (Pnt arrow[], int nr)
836 DoDrawPolygon(csBoardWindow, arrow, nr);
837 // if(!dual) DoDrawPolygon(csBoardBackup, arrow, nr);
840 //-------------------- Eval Graph drawing routines (formerly in xevalgraph.h) --------------------
843 ChoosePen(cairo_t *cr, int i)
847 SetPen(cr, 1.0, "#000000", 0);
850 SetPen(cr, 1.0, "#A0A0A0", 1);
853 SetPen(cr, 1.0, "#0000FF", 1);
856 SetPen(cr, 3.0, crWhite, 0);
859 SetPen(cr, 3.0, crBlack, 0);
862 SetPen(cr, 3.0, "#E0E0F0", 0);
867 // [HGM] front-end, added as wrapper to avoid use of LineTo and MoveToEx in other routines (so they can be back-end)
869 DrawSegment (int x, int y, int *lastX, int *lastY, int penType)
871 static int curX, curY;
873 if(penType != PEN_NONE) {
874 cairo_t *cr = cairo_create(DRAWABLE(disp));
875 cairo_set_antialias (cr, CAIRO_ANTIALIAS_NONE);
876 cairo_move_to (cr, curX, curY);
877 cairo_line_to (cr, x,y);
878 ChoosePen(cr, penType);
883 if(lastX != NULL) { *lastX = curX; *lastY = curY; }
887 // front-end wrapper for drawing functions to do rectangles
889 DrawRectangle (int left, int top, int right, int bottom, int side, int style)
893 cr = cairo_create (DRAWABLE(disp));
894 cairo_set_antialias (cr, CAIRO_ANTIALIAS_NONE);
895 cairo_rectangle (cr, left, top, right-left, bottom-top);
898 case 0: ChoosePen(cr, PEN_BOLDWHITE); break;
899 case 1: ChoosePen(cr, PEN_BOLDBLACK); break;
900 case 2: ChoosePen(cr, PEN_BACKGD); break;
906 cairo_rectangle (cr, left, top, right-left-1, bottom-top-1);
907 ChoosePen(cr, PEN_BLACK);
914 // front-end wrapper for putting text in graph
916 DrawEvalText (char *buf, int cbBuf, int y)
918 // the magic constants 8 and 5 should really be derived from the font size somehow
919 cairo_text_extents_t extents;
920 cairo_t *cr = cairo_create(DRAWABLE(disp));
922 /* GTK-TODO this has to go into the font-selection */
923 cairo_select_font_face (cr, "Sans",
924 CAIRO_FONT_SLANT_NORMAL,
925 CAIRO_FONT_WEIGHT_NORMAL);
926 cairo_set_font_size (cr, 12.0);
929 cairo_text_extents (cr, buf, &extents);
931 cairo_move_to (cr, MarginX - 2 - 8*cbBuf, y+5);
932 cairo_text_path (cr, buf);
933 cairo_set_source_rgb (cr, 0.0, 0.0, 0);
934 cairo_fill_preserve (cr);
935 cairo_set_source_rgb (cr, 0, 1.0, 0);
936 cairo_set_line_width (cr, 0.1);