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 == VariantChu) {
160 pngPieceBitmaps[i][(int)WhiteNightrider] = pngPieceBitmaps2[i][(int)WhiteKing+1];
161 pngPieceBitmaps[i][(int)WhiteUnicorn] = pngPieceBitmaps2[i][(int)WhiteCat];
162 pngPieceBitmaps[i][(int)WhiteSilver] = pngPieceBitmaps2[i][(int)WhiteSword];
163 pngPieceBitmaps[i][(int)WhiteFalcon] = pngPieceBitmaps2[i][(int)WhiteDagger];
168 #define BoardSize int
170 InitDrawingSizes (BoardSize boardSize, int flags)
171 { // [HGM] resize is functional now, but for board format changes only (nr of ranks, files)
172 int boardWidth, boardHeight;
173 static int oldWidth, oldHeight;
174 static VariantClass oldVariant;
175 static int oldTwoBoards = 0;
177 if(!mainOptions[W_BOARD].handle) return;
179 if(oldTwoBoards && !twoBoards) PopDown(DummyDlg);
180 oldTwoBoards = twoBoards;
182 if(appData.overrideLineGap >= 0) lineGap = appData.overrideLineGap;
183 boardWidth = lineGap + BOARD_WIDTH * (squareSize + lineGap);
184 boardHeight = lineGap + BOARD_HEIGHT * (squareSize + lineGap);
186 if(boardWidth != oldWidth || boardHeight != oldHeight) { // do resizing stuff only if size actually changed
188 oldWidth = boardWidth; oldHeight = boardHeight;
192 * Inhibit shell resizing.
194 ResizeBoardWindow(boardWidth, boardHeight, 0);
199 // [HGM] pieces: tailor piece bitmaps to needs of specific variant
202 if(gameInfo.variant != oldVariant) { // and only if variant changed
204 SelectPieces(gameInfo.variant);
206 oldVariant = gameInfo.variant;
212 ExposeRedraw (Option *graph, int x, int y, int w, int h)
213 { // copy a selected part of the buffer bitmap to the display
214 cairo_t *cr = cairo_create((cairo_surface_t *) graph->textValue);
215 cairo_set_source_surface(cr, (cairo_surface_t *) graph->choice, 0, 0);
216 cairo_set_antialias(cr, CAIRO_ANTIALIAS_NONE);
217 cairo_rectangle(cr, x, y, w, h);
223 CreatePNGBoard (char *s, int kind)
225 if(!appData.useBitmaps || s == NULL || *s == 0 || *s == '*') { useTexture &= ~(kind+1); return; }
226 if(strstr(s, ".png")) {
227 cairo_surface_t *img = cairo_image_surface_create_from_png (s);
229 useTexture |= kind + 1; pngBoardBitmap[kind] = img;
230 textureW[kind] = cairo_image_surface_get_width (img);
231 textureH[kind] = cairo_image_surface_get_height (img);
236 char *pngPieceNames[] = // must be in same order as internal piece encoding
237 { "Pawn", "Knight", "Bishop", "Rook", "Queen", "Advisor", "Elephant", "Archbishop", "Marshall", "Gold", "Commoner",
238 "Canon", "Nightrider", "CrownedBishop", "CrownedRook", "Princess", "Chancellor", "Hawk", "Lance", "Cobra", "Unicorn", "Lion",
239 "GoldPawn", "HSword", "PromoHorse", "PromoDragon", "Leopard", "PromoSword", "King", "Queen", "Lion", "PromoRook", "PromoHSword",
240 "Dolphin", "Chancellor", "Unicorn", "Hawk", "Sword", "Princess", "HCrown", "Knight", "Elephant", "PromoBishop", "King",
241 "Claw", "GoldKnight", "GoldLance", "GoldSilver", NULL
245 LoadSVG (char *dir, int color, int piece)
248 RsvgHandle *svg=svgPieces[color][piece];
249 RsvgDimensionData svg_dimensions;
250 GError *svgerror=NULL;
251 cairo_surface_t *img;
254 snprintf(buf, MSG_SIZ, "%s/%s%s.svg", dir, color ? "Black" : "White", pngPieceNames[piece]);
256 if(svg || *dir && (svg = rsvg_handle_new_from_file(buf, &svgerror))) {
258 rsvg_handle_get_dimensions(svg, &svg_dimensions);
259 img = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, squareSize, squareSize);
261 cr = cairo_create(img);
262 cairo_scale(cr, squareSize/(double) svg_dimensions.width, squareSize/(double) svg_dimensions.height);
263 rsvg_handle_render_cairo(svg, cr);
264 if(cairo_surface_status(img) == CAIRO_STATUS_SUCCESS) {
265 if(pngPieceImages[color][piece]) cairo_surface_destroy(pngPieceImages[color][piece]);
266 pngPieceImages[color][piece] = img;
273 g_error_free(svgerror);
278 ScaleOnePiece (int color, int piece)
282 cairo_surface_t *img, *cs;
287 svgPieces[color][piece] = LoadSVG("", color, piece); // this fills pngPieceImages if we had cached svg with bitmap of wanted size
289 if(!pngPieceImages[color][piece]) { // we don't have cached bitmap (implying we did not have cached svg)
290 if(*appData.pieceDirectory) { // user specified piece directory
291 snprintf(buf, MSG_SIZ, "%s/%s%s.png", appData.pieceDirectory, color ? "Black" : "White", pngPieceNames[piece]);
292 img = cairo_image_surface_create_from_png (buf); // try if there are png pieces there
293 if(cairo_surface_status(img) != CAIRO_STATUS_SUCCESS) { // there were not
294 svgPieces[color][piece] = LoadSVG(appData.pieceDirectory, color, piece); // so try if he has svg there
295 } else pngPieceImages[color][piece] = img;
299 if(!pngPieceImages[color][piece]) { // we still did not manage to acquire a piece bitmap
300 static int warned = 0;
301 if(!(svgPieces[color][piece] = LoadSVG(SVGDIR, color, piece)) && !warned) { // try to fall back on installed svg
302 char *msg = _("No default pieces installed!\nSelect your own using '-pieceImageDirectory'.");
303 printf("%s\n", msg); // give up
304 DisplayError(msg, 0);
305 warned = 1; // prevent error message being repeated for each piece type
309 img = pngPieceImages[color][piece];
311 // create new bitmap to hold scaled piece image (and remove any old)
312 if(pngPieceBitmaps2[color][piece]) cairo_surface_destroy (pngPieceBitmaps2[color][piece]);
313 pngPieceBitmaps2[color][piece] = cs = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, squareSize, squareSize);
317 // scaled copying of the raw png image
318 cr = cairo_create(cs);
319 w = cairo_image_surface_get_width (img);
320 h = cairo_image_surface_get_height (img);
321 cairo_scale(cr, squareSize/w, squareSize/h);
322 cairo_set_source_surface (cr, img, 0, 0);
326 if(!appData.trueColors || !*appData.pieceDirectory) { // operate on bitmap to color it (king-size hack...)
327 int stride = cairo_image_surface_get_stride(cs)/4;
328 int *buf = (int *) cairo_image_surface_get_data(cs);
330 sscanf(color ? appData.blackPieceColor+1 : appData.whitePieceColor+1, "%x", &p); // replacement color
331 cairo_surface_flush(cs);
332 for(i=0; i<squareSize; i++) for(j=0; j<squareSize; j++) {
335 unsigned int c = buf[i*stride + j];
336 a = c >> 24; r = c >> 16 & 255; // alpha and red, where red is the 'white' weight, since white is #FFFFCC in the source images
337 f = (color ? a - r : r)/255.; // fraction of black or white in the mix that has to be replaced
338 buf[i*stride + j] = c & 0xFF000000; // alpha channel is kept at same opacity
339 buf[i*stride + j] += ((int)(f*(p&0xFF0000)) & 0xFF0000) + ((int)(f*(p&0xFF00)) & 0xFF00) + (int)(f*(p&0xFF)); // add desired fraction of new color
340 if(color) buf[i*stride + j] += r | r << 8 | r << 16; // details on black pieces get their weight added in pure white
341 if(appData.monoMode) {
342 if(a < 64) buf[i*stride + j] = 0; // if not opaque enough, totally transparent
343 else if(2*r < a) buf[i*stride + j] = 0xFF000000; // if not light enough, totally black
344 else buf[i*stride + j] = 0xFFFFFFFF; // otherwise white
347 cairo_surface_mark_dirty(cs);
356 for(p=0; pngPieceNames[p]; p++) {
360 SelectPieces(gameInfo.variant);
365 { // [HGM] taken out of main
367 CreatePNGBoard(appData.liteBackTextureFile, 1);
368 CreatePNGBoard(appData.darkBackTextureFile, 0);
372 InitDrawingParams (int reloadPieces)
376 for(i=0; i<2; i++) for(p=0; p<BlackPawn+4; p++) {
377 if(pngPieceImages[i][p]) cairo_surface_destroy(pngPieceImages[i][p]);
378 pngPieceImages[i][p] = NULL;
379 if(svgPieces[i][p]) rsvg_handle_close(svgPieces[i][p], NULL);
380 svgPieces[i][p] = NULL;
385 // [HGM] seekgraph: some low-level drawing routines (by JC, mostly)
388 Color (char *col, int n)
391 sscanf(col, "#%x", &c);
397 SetPen (cairo_t *cr, float w, char *col, int dash)
399 static const double dotted[] = {4.0, 4.0};
400 static int len = sizeof(dotted) / sizeof(dotted[0]);
401 cairo_set_line_width (cr, w);
402 cairo_set_source_rgba (cr, Color(col, 4), Color(col, 2), Color(col, 0), 1.0);
403 if(dash) cairo_set_dash (cr, dotted, len, 0.0);
406 void DrawSeekAxis( int x, int y, int xTo, int yTo )
411 cr = cairo_create (csBoardWindow);
413 cairo_move_to (cr, x, y);
414 cairo_line_to(cr, xTo, yTo );
416 SetPen(cr, 2, "#000000", 0);
421 GraphExpose(currBoard, x-1, yTo-1, xTo-x+2, y-yTo+2);
424 void DrawSeekBackground( int left, int top, int right, int bottom )
426 cairo_t *cr = cairo_create (csBoardWindow);
428 cairo_rectangle (cr, left, top, right-left, bottom-top);
430 cairo_set_source_rgba(cr, 0.8, 0.8, 0.4,1.0);
435 GraphExpose(currBoard, left, top, right-left, bottom-top);
438 void DrawSeekText(char *buf, int x, int y)
440 cairo_t *cr = cairo_create (csBoardWindow);
442 cairo_select_font_face (cr, "Sans",
443 CAIRO_FONT_SLANT_NORMAL,
444 CAIRO_FONT_WEIGHT_NORMAL);
446 cairo_set_font_size (cr, 12.0);
448 cairo_move_to (cr, x, y+4);
449 cairo_set_source_rgba(cr, 0, 0, 0,1.0);
450 cairo_show_text( cr, buf);
454 GraphExpose(currBoard, x-5, y-10, 60, 15);
457 void DrawSeekDot(int x, int y, int colorNr)
459 cairo_t *cr = cairo_create (csBoardWindow);
460 int square = colorNr & 0x80;
464 cairo_rectangle (cr, x-squareSize/9, y-squareSize/9, 2*(squareSize/9), 2*(squareSize/9));
466 cairo_arc(cr, x, y, squareSize/9, 0.0, 2*M_PI);
468 SetPen(cr, 2, "#000000", 0);
469 cairo_stroke_preserve(cr);
471 case 0: cairo_set_source_rgba(cr, 1.0, 0, 0,1.0); break;
472 case 1: cairo_set_source_rgba (cr, 0.0, 0.7, 0.2, 1.0); break;
473 default: cairo_set_source_rgba (cr, 1.0, 1.0, 0.0, 1.0); break;
479 GraphExpose(currBoard, x-squareSize/8, y-squareSize/8, 2*(squareSize/8), 2*(squareSize/8));
483 InitDrawingHandle (Option *opt)
485 csBoardWindow = DRAWABLE(opt);
493 if (lineGap == 0) return;
495 /* [HR] Split this into 2 loops for non-square boards. */
497 for (i = 0; i < BOARD_HEIGHT + 1; i++) {
498 gridSegments[i].x1 = 0;
500 lineGap + BOARD_WIDTH * (squareSize + lineGap);
501 gridSegments[i].y1 = gridSegments[i].y2
502 = lineGap / 2 + (i * (squareSize + lineGap));
505 for (j = 0; j < BOARD_WIDTH + 1; j++) {
506 gridSegments[j + i].y1 = 0;
507 gridSegments[j + i].y2 =
508 lineGap + BOARD_HEIGHT * (squareSize + lineGap);
509 gridSegments[j + i].x1 = gridSegments[j + i].x2
510 = lineGap / 2 + (j * (squareSize + lineGap));
517 /* draws a grid starting around Nx, Ny squares starting at x,y */
519 float odd = (lineGap & 1)/2.;
523 cr = cairo_create (csBoardWindow);
525 cairo_set_antialias (cr, CAIRO_ANTIALIAS_NONE);
526 SetPen(cr, lineGap, "#000000", 0);
529 for (i = 0; i < BOARD_WIDTH + BOARD_HEIGHT + 2; i++)
531 int h = (gridSegments[i].y1 == gridSegments[i].y2); // horizontal
532 cairo_move_to (cr, gridSegments[i].x1 + !h*odd, gridSegments[i].y1 + h*odd);
533 cairo_line_to (cr, gridSegments[i].x2 + !h*odd, gridSegments[i].y2 + h*odd);
544 DrawBorder (int x, int y, int type, int odd)
550 case 0: col = "#000000"; break;
551 case 1: col = appData.highlightSquareColor; break;
552 case 2: col = appData.premoveHighlightColor; break;
553 default: col = "#808080"; break; // cannot happen
555 cr = cairo_create(csBoardWindow);
556 cairo_set_antialias(cr, CAIRO_ANTIALIAS_NONE);
557 cairo_rectangle(cr, x+odd/2., y+odd/2., squareSize+lineGap, squareSize+lineGap);
558 SetPen(cr, lineGap, col, 0);
561 GraphExpose(currBoard, x - lineGap/2, y - lineGap/2, squareSize+2*lineGap+odd, squareSize+2*lineGap+odd);
565 CutOutSquare (int x, int y, int *x0, int *y0, int kind)
567 int W = BOARD_WIDTH, H = BOARD_HEIGHT;
568 int nx = x/(squareSize + lineGap), ny = y/(squareSize + lineGap);
570 if(textureW[kind] < squareSize || textureH[kind] < squareSize) return 0;
571 if(textureW[kind] < W*squareSize)
572 *x0 = (textureW[kind] - squareSize) * nx/(W-1);
574 *x0 = textureW[kind]*nx / W + (textureW[kind] - W*squareSize) / (2*W);
575 if(textureH[kind] < H*squareSize)
576 *y0 = (textureH[kind] - squareSize) * ny/(H-1);
578 *y0 = textureH[kind]*ny / H + (textureH[kind] - H*squareSize) / (2*H);
583 DrawLogo (Option *opt, void *logo)
585 cairo_surface_t *img;
589 if(!logo || !opt) return;
590 img = cairo_image_surface_create_from_png (logo);
591 w = cairo_image_surface_get_width (img);
592 h = cairo_image_surface_get_height (img);
593 cr = cairo_create(DRAWABLE(opt));
594 // cairo_scale(cr, (float)appData.logoSize/w, appData.logoSize/(2.*h));
595 cairo_scale(cr, (float)opt->max/w, (float)opt->value/h);
596 cairo_set_source_surface (cr, img, 0, 0);
599 cairo_surface_destroy (img);
600 GraphExpose(opt, 0, 0, appData.logoSize, appData.logoSize/2);
604 BlankSquare (cairo_surface_t *dest, int x, int y, int color, ChessSquare piece, int fac)
605 { // [HGM] extra param 'fac' for forcing destination to (0,0) for copying to animation buffer
609 cr = cairo_create (dest);
611 if ((useTexture & color+1) && CutOutSquare(x, y, &x0, &y0, color)) {
612 cairo_set_source_surface (cr, pngBoardBitmap[color], x*fac - x0, y*fac - y0);
613 cairo_set_antialias (cr, CAIRO_ANTIALIAS_NONE);
614 cairo_rectangle (cr, x*fac, y*fac, squareSize, squareSize);
617 } else { // evenly colored squares
620 case 0: col = appData.darkSquareColor; break;
621 case 1: col = appData.lightSquareColor; break;
622 case 2: col = "#000000"; break;
623 default: col = "#808080"; break; // cannot happen
625 SetPen(cr, 2.0, col, 0);
626 cairo_rectangle (cr, fac*x, fac*y, squareSize, squareSize);
627 cairo_set_antialias (cr, CAIRO_ANTIALIAS_NONE);
634 pngDrawPiece (cairo_surface_t *dest, ChessSquare piece, int square_color, int x, int y)
639 if ((int)piece < (int) BlackPawn) {
645 if(appData.upsideDown && flipView) kind = 1 - kind; // swap white and black pieces
646 BlankSquare(dest, x, y, square_color, piece, 1); // erase previous contents with background
647 cr = cairo_create (dest);
648 cairo_set_source_surface (cr, pngPieceBitmaps[kind][piece], x, y);
653 static char *markerColor[8] = { "#FFFF00", "#FF0000", "#00FF00", "#0000FF", "#00FFFF", "#FF00FF", "#FFFFFF", "#000000" };
656 DoDrawDot (cairo_surface_t *cs, int marker, int x, int y, int r)
660 cr = cairo_create(cs);
661 cairo_arc(cr, x+r/2, y+r/2, r/2, 0.0, 2*M_PI);
662 if(appData.monoMode) {
663 SetPen(cr, 2, marker == 2 ? "#000000" : "#FFFFFF", 0);
664 cairo_stroke_preserve(cr);
665 SetPen(cr, 2, marker == 2 ? "#FFFFFF" : "#000000", 0);
667 SetPen(cr, 2, markerColor[marker-1], 0);
675 DrawDot (int marker, int x, int y, int r)
676 { // used for atomic captures; no need to draw on backup
677 DoDrawDot(csBoardWindow, marker, x, y, r);
678 GraphExpose(currBoard, x-r, y-r, 2*r, 2*r);
682 DrawText (char *string, int x, int y, int align)
685 cairo_text_extents_t te;
688 cr = cairo_create (csBoardWindow);
689 cairo_select_font_face (cr, "Sans",
690 CAIRO_FONT_SLANT_NORMAL,
691 CAIRO_FONT_WEIGHT_BOLD);
693 cairo_set_font_size (cr, squareSize/4);
694 // calculate where it goes
695 cairo_text_extents (cr, string, &te);
698 xx += squareSize - te.width - te.x_bearing - 1;
699 yy += squareSize - te.height - te.y_bearing - 1;
700 } else if (align == 2) {
701 xx += te.x_bearing + 1, yy += -te.y_bearing + 1;
702 } else if (align == 3) {
703 xx += squareSize - te.width -te.x_bearing - 1;
704 yy += -te.y_bearing + 3;
705 } else if (align == 4) {
706 xx += te.x_bearing + 1, yy += -te.y_bearing + 3;
709 cairo_move_to (cr, xx-1, yy);
710 if(align < 3) cairo_set_source_rgb (cr, 0.0, 0.0, 0.0);
711 else cairo_set_source_rgb (cr, 1.0, 1.0, 1.0);
712 cairo_show_text (cr, string);
717 DrawOneSquare (int x, int y, ChessSquare piece, int square_color, int marker, char *tString, char *bString, int align)
718 { // basic front-end board-draw function: takes care of everything that can be in square:
719 // piece, background, coordinate/count, marker dot
721 if (piece == EmptySquare) {
722 BlankSquare(csBoardWindow, x, y, square_color, piece, 1);
724 pngDrawPiece(csBoardWindow, piece, square_color, x, y);
727 if(align) { // square carries inscription (coord or piece count)
728 if(align > 1) DrawText(tString, x, y, align); // top (rank or count)
729 if(bString && *bString) DrawText(bString, x, y, 1); // bottom (always lower right file ID)
732 if(marker) { // print fat marker dot, if requested
733 DoDrawDot(csBoardWindow, marker, x + squareSize/4, y+squareSize/4, squareSize/2);
737 /**** Animation code by Hugh Fisher, DCS, ANU. ****/
739 /* Masks for XPM pieces. Black and white pieces can have
740 different shapes, but in the interest of retaining my
741 sanity pieces must have the same outline on both light
742 and dark squares, and all pieces must use the same
743 background square colors/images. */
745 static cairo_surface_t *c_animBufs[3*NrOfAnims]; // newBuf, saveBuf
748 InitAnimState (AnimNr anr)
750 if(c_animBufs[anr]) cairo_surface_destroy (c_animBufs[anr]);
751 if(c_animBufs[anr+2]) cairo_surface_destroy (c_animBufs[anr+2]);
752 c_animBufs[anr+4] = csBoardWindow;
753 c_animBufs[anr+2] = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, squareSize, squareSize);
754 c_animBufs[anr] = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, squareSize, squareSize);
761 InitAnimState(Player);
765 CairoOverlayPiece (ChessSquare piece, cairo_surface_t *dest)
767 static cairo_t *pieceSource;
768 pieceSource = cairo_create (dest);
769 cairo_set_source_surface (pieceSource, pngPieceBitmaps[!White(piece)][piece % BlackPawn], 0, 0);
770 if(doubleClick) cairo_paint_with_alpha (pieceSource, 0.6);
771 else cairo_paint(pieceSource);
772 cairo_destroy (pieceSource);
776 InsertPiece (AnimNr anr, ChessSquare piece)
778 CairoOverlayPiece(piece, c_animBufs[anr]);
782 DrawBlank (AnimNr anr, int x, int y, int startColor)
784 BlankSquare(c_animBufs[anr+2], x, y, startColor, EmptySquare, 0);
787 void CopyRectangle (AnimNr anr, int srcBuf, int destBuf,
788 int srcX, int srcY, int width, int height, int destX, int destY)
791 c_animBufs[anr+4] = csBoardWindow;
792 cr = cairo_create (c_animBufs[anr+destBuf]);
793 cairo_set_source_surface (cr, c_animBufs[anr+srcBuf], destX - srcX, destY - srcY);
794 cairo_rectangle (cr, destX, destY, width, height);
797 if(c_animBufs[anr+destBuf] == csBoardWindow) // suspect that GTK needs this!
798 GraphExpose(currBoard, destX, destY, width, height);
802 SetDragPiece (AnimNr anr, ChessSquare piece)
806 /* [AS] Arrow highlighting support */
809 DoDrawPolygon (cairo_surface_t *cs, Pnt arrow[], int nr)
813 cr = cairo_create (cs);
814 cairo_move_to (cr, arrow[nr-1].x, arrow[nr-1].y);
816 cairo_line_to(cr, arrow[i].x, arrow[i].y);
818 if(appData.monoMode) { // should we always outline arrow?
819 cairo_line_to(cr, arrow[0].x, arrow[0].y);
820 SetPen(cr, 2, "#000000", 0);
821 cairo_stroke_preserve(cr);
823 SetPen(cr, 2, appData.highlightSquareColor, 0);
831 DrawPolygon (Pnt arrow[], int nr)
833 DoDrawPolygon(csBoardWindow, arrow, nr);
834 // if(!dual) DoDrawPolygon(csBoardBackup, arrow, nr);
837 //-------------------- Eval Graph drawing routines (formerly in xevalgraph.h) --------------------
840 ChoosePen(cairo_t *cr, int i)
844 SetPen(cr, 1.0, "#000000", 0);
847 SetPen(cr, 1.0, "#A0A0A0", 1);
850 SetPen(cr, 1.0, "#0000FF", 1);
853 SetPen(cr, 3.0, crWhite, 0);
856 SetPen(cr, 3.0, crBlack, 0);
859 SetPen(cr, 3.0, "#E0E0F0", 0);
864 // [HGM] front-end, added as wrapper to avoid use of LineTo and MoveToEx in other routines (so they can be back-end)
866 DrawSegment (int x, int y, int *lastX, int *lastY, int penType)
868 static int curX, curY;
870 if(penType != PEN_NONE) {
871 cairo_t *cr = cairo_create(DRAWABLE(disp));
872 cairo_set_antialias (cr, CAIRO_ANTIALIAS_NONE);
873 cairo_move_to (cr, curX, curY);
874 cairo_line_to (cr, x,y);
875 ChoosePen(cr, penType);
880 if(lastX != NULL) { *lastX = curX; *lastY = curY; }
884 // front-end wrapper for drawing functions to do rectangles
886 DrawRectangle (int left, int top, int right, int bottom, int side, int style)
890 cr = cairo_create (DRAWABLE(disp));
891 cairo_set_antialias (cr, CAIRO_ANTIALIAS_NONE);
892 cairo_rectangle (cr, left, top, right-left, bottom-top);
895 case 0: ChoosePen(cr, PEN_BOLDWHITE); break;
896 case 1: ChoosePen(cr, PEN_BOLDBLACK); break;
897 case 2: ChoosePen(cr, PEN_BACKGD); break;
903 cairo_rectangle (cr, left, top, right-left-1, bottom-top-1);
904 ChoosePen(cr, PEN_BLACK);
911 // front-end wrapper for putting text in graph
913 DrawEvalText (char *buf, int cbBuf, int y)
915 // the magic constants 8 and 5 should really be derived from the font size somehow
916 cairo_text_extents_t extents;
917 cairo_t *cr = cairo_create(DRAWABLE(disp));
919 /* GTK-TODO this has to go into the font-selection */
920 cairo_select_font_face (cr, "Sans",
921 CAIRO_FONT_SLANT_NORMAL,
922 CAIRO_FONT_WEIGHT_NORMAL);
923 cairo_set_font_size (cr, 12.0);
926 cairo_text_extents (cr, buf, &extents);
928 cairo_move_to (cr, MarginX - 2 - 8*cbBuf, y+5);
929 cairo_text_path (cr, buf);
930 cairo_set_source_rgb (cr, 0.0, 0.0, 0);
931 cairo_fill_preserve (cr);
932 cairo_set_source_rgb (cr, 0, 1.0, 0);
933 cairo_set_line_width (cr, 0.1);