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 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 oldVariant = gameInfo.variant;
208 ExposeRedraw (Option *graph, int x, int y, int w, int h)
209 { // copy a selected part of the buffer bitmap to the display
210 cairo_t *cr = cairo_create((cairo_surface_t *) graph->textValue);
211 cairo_set_source_surface(cr, (cairo_surface_t *) graph->choice, 0, 0);
212 cairo_set_antialias(cr, CAIRO_ANTIALIAS_NONE);
213 cairo_rectangle(cr, x, y, w, h);
219 CreatePNGBoard (char *s, int kind)
221 if(!appData.useBitmaps || s == NULL || *s == 0 || *s == '*') { useTexture &= ~(kind+1); return; }
222 if(strstr(s, ".png")) {
223 cairo_surface_t *img = cairo_image_surface_create_from_png (s);
225 useTexture |= kind + 1; pngBoardBitmap[kind] = img;
226 textureW[kind] = cairo_image_surface_get_width (img);
227 textureH[kind] = cairo_image_surface_get_height (img);
232 char *pngPieceNames[] = // must be in same order as internal piece encoding
233 { "Pawn", "Knight", "Bishop", "Rook", "Queen", "Advisor", "Elephant", "Archbishop", "Marshall", "Gold", "Commoner",
234 "Canon", "Nightrider", "CrownedBishop", "CrownedRook", "Princess", "Chancellor", "Hawk", "Lance", "Cobra", "Unicorn", "King",
235 "GoldKnight", "GoldLance", "GoldPawn", "GoldSilver", NULL
239 LoadSVG (char *dir, int color, int piece)
242 RsvgHandle *svg=svgPieces[color][piece];
243 RsvgDimensionData svg_dimensions;
244 GError *svgerror=NULL;
245 cairo_surface_t *img;
248 snprintf(buf, MSG_SIZ, "%s/%s%s.svg", dir, color ? "Black" : "White", pngPieceNames[piece]);
250 if(svg || *dir && (svg = rsvg_handle_new_from_file(buf, &svgerror))) {
252 rsvg_handle_get_dimensions(svg, &svg_dimensions);
253 img = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, squareSize, squareSize);
255 cr = cairo_create(img);
256 cairo_scale(cr, squareSize/(double) svg_dimensions.width, squareSize/(double) svg_dimensions.height);
257 rsvg_handle_render_cairo(svg, cr);
258 if(cairo_surface_status(img) == CAIRO_STATUS_SUCCESS) {
259 if(pngPieceImages[color][piece]) cairo_surface_destroy(pngPieceImages[color][piece]);
260 pngPieceImages[color][piece] = img;
267 g_error_free(svgerror);
272 ScaleOnePiece (int color, int piece)
276 cairo_surface_t *img, *cs;
281 svgPieces[color][piece] = LoadSVG("", color, piece); // this fills pngPieceImages if we had cached svg with bitmap of wanted size
283 if(!pngPieceImages[color][piece]) { // we don't have cached bitmap (implying we did not have cached svg)
284 if(*appData.pieceDirectory) { // user specified piece directory
285 snprintf(buf, MSG_SIZ, "%s/%s%s.png", appData.pieceDirectory, color ? "Black" : "White", pngPieceNames[piece]);
286 img = cairo_image_surface_create_from_png (buf); // try if there are png pieces there
287 if(cairo_surface_status(img) != CAIRO_STATUS_SUCCESS) { // there were not
288 svgPieces[color][piece] = LoadSVG(appData.pieceDirectory, color, piece); // so try if he has svg there
289 } else pngPieceImages[color][piece] = img;
293 if(!pngPieceImages[color][piece]) { // we still did not manage to acquire a piece bitmap
294 static int warned = 0;
295 if(!(svgPieces[color][piece] = LoadSVG(SVGDIR, color, piece)) && !warned) { // try to fall back on installed svg
296 char *msg = _("No default pieces installed\nSelect your own -pieceImageDirectory");
297 printf("%s\n", msg); // give up
298 DisplayError(msg, 0);
299 warned = 1; // prevent error message being repeated for each piece type
303 img = pngPieceImages[color][piece];
305 // create new bitmap to hold scaled piece image (and remove any old)
306 if(pngPieceBitmaps2[color][piece]) cairo_surface_destroy (pngPieceBitmaps2[color][piece]);
307 pngPieceBitmaps2[color][piece] = cs = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, squareSize, squareSize);
311 // scaled copying of the raw png image
312 cr = cairo_create(cs);
313 w = cairo_image_surface_get_width (img);
314 h = cairo_image_surface_get_height (img);
315 cairo_scale(cr, squareSize/w, squareSize/h);
316 cairo_set_source_surface (cr, img, 0, 0);
320 if(!appData.trueColors || !*appData.pieceDirectory) { // operate on bitmap to color it (king-size hack...)
321 int stride = cairo_image_surface_get_stride(cs)/4;
322 int *buf = (int *) cairo_image_surface_get_data(cs);
324 sscanf(color ? appData.blackPieceColor+1 : appData.whitePieceColor+1, "%x", &p); // replacement color
325 cairo_surface_flush(cs);
326 for(i=0; i<squareSize; i++) for(j=0; j<squareSize; j++) {
329 unsigned int c = buf[i*stride + j];
330 a = c >> 24; r = c >> 16 & 255; // alpha and red, where red is the 'white' weight, since white is #FFFFCC in the source images
331 f = (color ? a - r : r)/255.; // fraction of black or white in the mix that has to be replaced
332 buf[i*stride + j] = c & 0xFF000000; // alpha channel is kept at same opacity
333 buf[i*stride + j] += ((int)(f*(p&0xFF0000)) & 0xFF0000) + ((int)(f*(p&0xFF00)) & 0xFF00) + (int)(f*(p&0xFF)); // add desired fraction of new color
334 if(color) buf[i*stride + j] += r | r << 8 | r << 16; // details on black pieces get their weight added in pure white
335 if(appData.monoMode) {
336 if(a < 64) buf[i*stride + j] = 0; // if not opaque enough, totally transparent
337 else if(2*r < a) buf[i*stride + j] = 0xFF000000; // if not light enough, totally black
338 else buf[i*stride + j] = 0xFFFFFFFF; // otherwise white
341 cairo_surface_mark_dirty(cs);
350 for(p=0; pngPieceNames[p]; p++) {
354 SelectPieces(gameInfo.variant);
359 { // [HGM] taken out of main
361 CreatePNGBoard(appData.liteBackTextureFile, 1);
362 CreatePNGBoard(appData.darkBackTextureFile, 0);
366 InitDrawingParams (int reloadPieces)
370 for(i=0; i<2; i++) for(p=0; p<BlackPawn+4; p++) {
371 if(pngPieceImages[i][p]) cairo_surface_destroy(pngPieceImages[i][p]);
372 pngPieceImages[i][p] = NULL;
373 if(svgPieces[i][p]) rsvg_handle_close(svgPieces[i][p], NULL);
374 svgPieces[i][p] = NULL;
379 // [HGM] seekgraph: some low-level drawing routines (by JC, mostly)
382 Color (char *col, int n)
385 sscanf(col, "#%x", &c);
391 SetPen (cairo_t *cr, float w, char *col, int dash)
393 static const double dotted[] = {4.0, 4.0};
394 static int len = sizeof(dotted) / sizeof(dotted[0]);
395 cairo_set_line_width (cr, w);
396 cairo_set_source_rgba (cr, Color(col, 4), Color(col, 2), Color(col, 0), 1.0);
397 if(dash) cairo_set_dash (cr, dotted, len, 0.0);
400 void DrawSeekAxis( int x, int y, int xTo, int yTo )
405 cr = cairo_create (csBoardWindow);
407 cairo_move_to (cr, x, y);
408 cairo_line_to(cr, xTo, yTo );
410 SetPen(cr, 2, "#000000", 0);
415 GraphExpose(currBoard, x-1, yTo-1, xTo-x+2, y-yTo+2);
418 void DrawSeekBackground( int left, int top, int right, int bottom )
420 cairo_t *cr = cairo_create (csBoardWindow);
422 cairo_rectangle (cr, left, top, right-left, bottom-top);
424 cairo_set_source_rgba(cr, 0.8, 0.8, 0.4,1.0);
429 GraphExpose(currBoard, left, top, right-left, bottom-top);
432 void DrawSeekText(char *buf, int x, int y)
434 cairo_t *cr = cairo_create (csBoardWindow);
436 cairo_select_font_face (cr, "Sans",
437 CAIRO_FONT_SLANT_NORMAL,
438 CAIRO_FONT_WEIGHT_NORMAL);
440 cairo_set_font_size (cr, 12.0);
442 cairo_move_to (cr, x, y+4);
443 cairo_set_source_rgba(cr, 0, 0, 0,1.0);
444 cairo_show_text( cr, buf);
448 GraphExpose(currBoard, x-5, y-10, 60, 15);
451 void DrawSeekDot(int x, int y, int colorNr)
453 cairo_t *cr = cairo_create (csBoardWindow);
454 int square = colorNr & 0x80;
458 cairo_rectangle (cr, x-squareSize/9, y-squareSize/9, 2*(squareSize/9), 2*(squareSize/9));
460 cairo_arc(cr, x, y, squareSize/9, 0.0, 2*M_PI);
462 SetPen(cr, 2, "#000000", 0);
463 cairo_stroke_preserve(cr);
465 case 0: cairo_set_source_rgba(cr, 1.0, 0, 0,1.0); break;
466 case 1: cairo_set_source_rgba (cr, 0.0, 0.7, 0.2, 1.0); break;
467 default: cairo_set_source_rgba (cr, 1.0, 1.0, 0.0, 1.0); break;
473 GraphExpose(currBoard, x-squareSize/8, y-squareSize/8, 2*(squareSize/8), 2*(squareSize/8));
477 InitDrawingHandle (Option *opt)
479 csBoardWindow = DRAWABLE(opt);
487 if (lineGap == 0) return;
489 /* [HR] Split this into 2 loops for non-square boards. */
491 for (i = 0; i < BOARD_HEIGHT + 1; i++) {
492 gridSegments[i].x1 = 0;
494 lineGap + BOARD_WIDTH * (squareSize + lineGap);
495 gridSegments[i].y1 = gridSegments[i].y2
496 = lineGap / 2 + (i * (squareSize + lineGap));
499 for (j = 0; j < BOARD_WIDTH + 1; j++) {
500 gridSegments[j + i].y1 = 0;
501 gridSegments[j + i].y2 =
502 lineGap + BOARD_HEIGHT * (squareSize + lineGap);
503 gridSegments[j + i].x1 = gridSegments[j + i].x2
504 = lineGap / 2 + (j * (squareSize + lineGap));
511 /* draws a grid starting around Nx, Ny squares starting at x,y */
513 float odd = (lineGap & 1)/2.;
517 cr = cairo_create (csBoardWindow);
519 cairo_set_antialias (cr, CAIRO_ANTIALIAS_NONE);
520 SetPen(cr, lineGap, "#000000", 0);
523 for (i = 0; i < BOARD_WIDTH + BOARD_HEIGHT + 2; i++)
525 int h = (gridSegments[i].y1 == gridSegments[i].y2); // horizontal
526 cairo_move_to (cr, gridSegments[i].x1 + !h*odd, gridSegments[i].y1 + h*odd);
527 cairo_line_to (cr, gridSegments[i].x2 + !h*odd, gridSegments[i].y2 + h*odd);
538 DrawBorder (int x, int y, int type, int odd)
544 case 0: col = "#000000"; break;
545 case 1: col = appData.highlightSquareColor; break;
546 case 2: col = appData.premoveHighlightColor; break;
547 default: col = "#808080"; break; // cannot happen
549 cr = cairo_create(csBoardWindow);
550 cairo_set_antialias(cr, CAIRO_ANTIALIAS_NONE);
551 cairo_rectangle(cr, x+odd/2., y+odd/2., squareSize+lineGap, squareSize+lineGap);
552 SetPen(cr, lineGap, col, 0);
555 GraphExpose(currBoard, x - lineGap/2, y - lineGap/2, squareSize+2*lineGap+odd, squareSize+2*lineGap+odd);
559 CutOutSquare (int x, int y, int *x0, int *y0, int kind)
561 int W = BOARD_WIDTH, H = BOARD_HEIGHT;
562 int nx = x/(squareSize + lineGap), ny = y/(squareSize + lineGap);
564 if(textureW[kind] < squareSize || textureH[kind] < squareSize) return 0;
565 if(textureW[kind] < W*squareSize)
566 *x0 = (textureW[kind] - squareSize) * nx/(W-1);
568 *x0 = textureW[kind]*nx / W + (textureW[kind] - W*squareSize) / (2*W);
569 if(textureH[kind] < H*squareSize)
570 *y0 = (textureH[kind] - squareSize) * ny/(H-1);
572 *y0 = textureH[kind]*ny / H + (textureH[kind] - H*squareSize) / (2*H);
577 DrawLogo (Option *opt, void *logo)
579 cairo_surface_t *img;
583 if(!logo || !opt) return;
584 img = cairo_image_surface_create_from_png (logo);
585 w = cairo_image_surface_get_width (img);
586 h = cairo_image_surface_get_height (img);
587 cr = cairo_create(DRAWABLE(opt));
588 // cairo_scale(cr, (float)appData.logoSize/w, appData.logoSize/(2.*h));
589 cairo_scale(cr, (float)opt->max/w, (float)opt->value/h);
590 cairo_set_source_surface (cr, img, 0, 0);
593 cairo_surface_destroy (img);
594 GraphExpose(opt, 0, 0, appData.logoSize, appData.logoSize/2);
598 BlankSquare (cairo_surface_t *dest, int x, int y, int color, ChessSquare piece, int fac)
599 { // [HGM] extra param 'fac' for forcing destination to (0,0) for copying to animation buffer
603 cr = cairo_create (dest);
605 if ((useTexture & color+1) && CutOutSquare(x, y, &x0, &y0, color)) {
606 cairo_set_source_surface (cr, pngBoardBitmap[color], x*fac - x0, y*fac - y0);
607 cairo_set_antialias (cr, CAIRO_ANTIALIAS_NONE);
608 cairo_rectangle (cr, x*fac, y*fac, squareSize, squareSize);
611 } else { // evenly colored squares
614 case 0: col = appData.darkSquareColor; break;
615 case 1: col = appData.lightSquareColor; break;
616 case 2: col = "#000000"; break;
617 default: col = "#808080"; break; // cannot happen
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);