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;
548 cr = cairo_create(csBoardWindow);
549 cairo_set_antialias(cr, CAIRO_ANTIALIAS_NONE);
550 cairo_rectangle(cr, x+odd/2., y+odd/2., squareSize+lineGap, squareSize+lineGap);
551 SetPen(cr, lineGap, col, 0);
554 GraphExpose(currBoard, x - lineGap/2, y - lineGap/2, squareSize+2*lineGap+odd, squareSize+2*lineGap+odd);
558 CutOutSquare (int x, int y, int *x0, int *y0, int kind)
560 int W = BOARD_WIDTH, H = BOARD_HEIGHT;
561 int nx = x/(squareSize + lineGap), ny = y/(squareSize + lineGap);
563 if(textureW[kind] < squareSize || textureH[kind] < squareSize) return 0;
564 if(textureW[kind] < W*squareSize)
565 *x0 = (textureW[kind] - squareSize) * nx/(W-1);
567 *x0 = textureW[kind]*nx / W + (textureW[kind] - W*squareSize) / (2*W);
568 if(textureH[kind] < H*squareSize)
569 *y0 = (textureH[kind] - squareSize) * ny/(H-1);
571 *y0 = textureH[kind]*ny / H + (textureH[kind] - H*squareSize) / (2*H);
576 DrawLogo (Option *opt, void *logo)
578 cairo_surface_t *img;
582 if(!logo || !opt) return;
583 img = cairo_image_surface_create_from_png (logo);
584 w = cairo_image_surface_get_width (img);
585 h = cairo_image_surface_get_height (img);
586 cr = cairo_create(DRAWABLE(opt));
587 // cairo_scale(cr, (float)appData.logoSize/w, appData.logoSize/(2.*h));
588 cairo_scale(cr, (float)opt->max/w, (float)opt->value/h);
589 cairo_set_source_surface (cr, img, 0, 0);
592 cairo_surface_destroy (img);
593 GraphExpose(opt, 0, 0, appData.logoSize, appData.logoSize/2);
597 BlankSquare (cairo_surface_t *dest, int x, int y, int color, ChessSquare piece, int fac)
598 { // [HGM] extra param 'fac' for forcing destination to (0,0) for copying to animation buffer
602 cr = cairo_create (dest);
604 if ((useTexture & color+1) && CutOutSquare(x, y, &x0, &y0, color)) {
605 cairo_set_source_surface (cr, pngBoardBitmap[color], x*fac - x0, y*fac - y0);
606 cairo_set_antialias (cr, CAIRO_ANTIALIAS_NONE);
607 cairo_rectangle (cr, x*fac, y*fac, squareSize, squareSize);
610 } else { // evenly colored squares
613 case 0: col = appData.darkSquareColor; break;
614 case 1: col = appData.lightSquareColor; break;
615 case 2: col = "#000000"; break;
617 SetPen(cr, 2.0, col, 0);
618 cairo_rectangle (cr, fac*x, fac*y, squareSize, squareSize);
619 cairo_set_antialias (cr, CAIRO_ANTIALIAS_NONE);
626 pngDrawPiece (cairo_surface_t *dest, ChessSquare piece, int square_color, int x, int y)
631 if ((int)piece < (int) BlackPawn) {
637 if(appData.upsideDown && flipView) { p += p < BlackPawn ? BlackPawn : -BlackPawn; }// swap white and black pieces
638 BlankSquare(dest, x, y, square_color, piece, 1); // erase previous contents with background
639 cr = cairo_create (dest);
640 cairo_set_source_surface (cr, pngPieceBitmaps[kind][piece], x, y);
646 DoDrawDot (cairo_surface_t *cs, int marker, int x, int y, int r)
650 cr = cairo_create(cs);
651 cairo_arc(cr, x+r/2, y+r/2, r/2, 0.0, 2*M_PI);
652 if(appData.monoMode) {
653 SetPen(cr, 2, marker == 2 ? "#000000" : "#FFFFFF", 0);
654 cairo_stroke_preserve(cr);
655 SetPen(cr, 2, marker == 2 ? "#FFFFFF" : "#000000", 0);
657 SetPen(cr, 2, marker == 2 ? "#FF0000" : "#FFFF00", 0);
665 DrawDot (int marker, int x, int y, int r)
666 { // used for atomic captures; no need to draw on backup
667 DoDrawDot(csBoardWindow, marker, x, y, r);
668 GraphExpose(currBoard, x-r, y-r, 2*r, 2*r);
672 DrawOneSquare (int x, int y, ChessSquare piece, int square_color, int marker, char *string, int align)
673 { // basic front-end board-draw function: takes care of everything that can be in square:
674 // piece, background, coordinate/count, marker dot
677 if (piece == EmptySquare) {
678 BlankSquare(csBoardWindow, x, y, square_color, piece, 1);
680 pngDrawPiece(csBoardWindow, piece, square_color, x, y);
683 if(align) { // square carries inscription (coord or piece count)
685 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);
715 if(marker) { // print fat marker dot, if requested
716 DoDrawDot(csBoardWindow, marker, x + squareSize/4, y+squareSize/4, squareSize/2);
720 /**** Animation code by Hugh Fisher, DCS, ANU. ****/
722 /* Masks for XPM pieces. Black and white pieces can have
723 different shapes, but in the interest of retaining my
724 sanity pieces must have the same outline on both light
725 and dark squares, and all pieces must use the same
726 background square colors/images. */
728 static cairo_surface_t *c_animBufs[3*NrOfAnims]; // newBuf, saveBuf
731 InitAnimState (AnimNr anr)
733 if(c_animBufs[anr]) cairo_surface_destroy (c_animBufs[anr]);
734 if(c_animBufs[anr+2]) cairo_surface_destroy (c_animBufs[anr+2]);
735 c_animBufs[anr+4] = csBoardWindow;
736 c_animBufs[anr+2] = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, squareSize, squareSize);
737 c_animBufs[anr] = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, squareSize, squareSize);
744 InitAnimState(Player);
748 CairoOverlayPiece (ChessSquare piece, cairo_surface_t *dest)
750 static cairo_t *pieceSource;
751 pieceSource = cairo_create (dest);
752 cairo_set_source_surface (pieceSource, pngPieceBitmaps[!White(piece)][piece % BlackPawn], 0, 0);
753 if(doubleClick) cairo_paint_with_alpha (pieceSource, 0.6);
754 else cairo_paint(pieceSource);
755 cairo_destroy (pieceSource);
759 InsertPiece (AnimNr anr, ChessSquare piece)
761 CairoOverlayPiece(piece, c_animBufs[anr]);
765 DrawBlank (AnimNr anr, int x, int y, int startColor)
767 BlankSquare(c_animBufs[anr+2], x, y, startColor, EmptySquare, 0);
770 void CopyRectangle (AnimNr anr, int srcBuf, int destBuf,
771 int srcX, int srcY, int width, int height, int destX, int destY)
774 c_animBufs[anr+4] = csBoardWindow;
775 cr = cairo_create (c_animBufs[anr+destBuf]);
776 cairo_set_source_surface (cr, c_animBufs[anr+srcBuf], destX - srcX, destY - srcY);
777 cairo_rectangle (cr, destX, destY, width, height);
780 if(c_animBufs[anr+destBuf] == csBoardWindow) // suspect that GTK needs this!
781 GraphExpose(currBoard, destX, destY, width, height);
785 SetDragPiece (AnimNr anr, ChessSquare piece)
789 /* [AS] Arrow highlighting support */
792 DoDrawPolygon (cairo_surface_t *cs, Pnt arrow[], int nr)
796 cr = cairo_create (cs);
797 cairo_move_to (cr, arrow[nr-1].x, arrow[nr-1].y);
799 cairo_line_to(cr, arrow[i].x, arrow[i].y);
801 if(appData.monoMode) { // should we always outline arrow?
802 cairo_line_to(cr, arrow[0].x, arrow[0].y);
803 SetPen(cr, 2, "#000000", 0);
804 cairo_stroke_preserve(cr);
806 SetPen(cr, 2, appData.highlightSquareColor, 0);
814 DrawPolygon (Pnt arrow[], int nr)
816 DoDrawPolygon(csBoardWindow, arrow, nr);
817 // if(!dual) DoDrawPolygon(csBoardBackup, arrow, nr);
820 //-------------------- Eval Graph drawing routines (formerly in xevalgraph.h) --------------------
823 ChoosePen(cairo_t *cr, int i)
827 SetPen(cr, 1.0, "#000000", 0);
830 SetPen(cr, 1.0, "#A0A0A0", 1);
833 SetPen(cr, 1.0, "#0000FF", 1);
836 SetPen(cr, 3.0, crWhite, 0);
839 SetPen(cr, 3.0, crBlack, 0);
842 SetPen(cr, 3.0, "#E0E0F0", 0);
847 // [HGM] front-end, added as wrapper to avoid use of LineTo and MoveToEx in other routines (so they can be back-end)
849 DrawSegment (int x, int y, int *lastX, int *lastY, int penType)
851 static int curX, curY;
853 if(penType != PEN_NONE) {
854 cairo_t *cr = cairo_create(DRAWABLE(disp));
855 cairo_set_antialias (cr, CAIRO_ANTIALIAS_NONE);
856 cairo_move_to (cr, curX, curY);
857 cairo_line_to (cr, x,y);
858 ChoosePen(cr, penType);
863 if(lastX != NULL) { *lastX = curX; *lastY = curY; }
867 // front-end wrapper for drawing functions to do rectangles
869 DrawRectangle (int left, int top, int right, int bottom, int side, int style)
873 cr = cairo_create (DRAWABLE(disp));
874 cairo_set_antialias (cr, CAIRO_ANTIALIAS_NONE);
875 cairo_rectangle (cr, left, top, right-left, bottom-top);
878 case 0: ChoosePen(cr, PEN_BOLDWHITE); break;
879 case 1: ChoosePen(cr, PEN_BOLDBLACK); break;
880 case 2: ChoosePen(cr, PEN_BACKGD); break;
886 cairo_rectangle (cr, left, top, right-left-1, bottom-top-1);
887 ChoosePen(cr, PEN_BLACK);
894 // front-end wrapper for putting text in graph
896 DrawEvalText (char *buf, int cbBuf, int y)
898 // the magic constants 8 and 5 should really be derived from the font size somehow
899 cairo_text_extents_t extents;
900 cairo_t *cr = cairo_create(DRAWABLE(disp));
902 /* GTK-TODO this has to go into the font-selection */
903 cairo_select_font_face (cr, "Sans",
904 CAIRO_FONT_SLANT_NORMAL,
905 CAIRO_FONT_WEIGHT_NORMAL);
906 cairo_set_font_size (cr, 12.0);
909 cairo_text_extents (cr, buf, &extents);
911 cairo_move_to (cr, MarginX - 2 - 8*cbBuf, y+5);
912 cairo_text_path (cr, buf);
913 cairo_set_source_rgb (cr, 0.0, 0.0, 0);
914 cairo_fill_preserve (cr);
915 cairo_set_source_rgb (cr, 0, 1.0, 0);
916 cairo_set_line_width (cr, 0.1);