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fen.c: reduce filesize of SVG further - chess-puzzles - chess puzzle book gener… |
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git clone git://git.codemadness.org/chess-puzzles |
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--- |
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commit 9a70ccee5e9c5462e079304c3521c2c7640bf51d |
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parent e536a441d52c33adea06f8ed451bd890a3ebdb9d |
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Author: Hiltjo Posthuma <[email protected]> |
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Date: Sun, 24 Dec 2023 11:38:26 +0100 |
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fen.c: reduce filesize of SVG further |
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Only define drawing commands for the pieces used. Reuse them for multiple |
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pieces. |
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The pawn definition is reused, but with a different fill color. |
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Diffstat: |
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M fen.c | 73 ++++++++++++++++++++++++-----… |
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1 file changed, 57 insertions(+), 16 deletions(-) |
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--- |
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diff --git a/fen.c b/fen.c |
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@@ -169,17 +169,17 @@ showpiece_svg(int c) |
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/* lichess default set, |
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extracted from https://github.com/lichess-org/lila/tree/master/publ… |
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switch (c) { |
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- case 'K': s = "<g fill=\"none\" fill-rule=\"evenodd\" stroke=\"#000\" … |
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- case 'Q': s = "<g fill=\"#fff\" fill-rule=\"evenodd\" stroke=\"#000\" … |
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- case 'R': s = "<g fill=\"#fff\" fill-rule=\"evenodd\" stroke=\"#000\" … |
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- case 'B': s = "<g fill=\"none\" fill-rule=\"evenodd\" stroke=\"#000\" … |
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- case 'N': s = "<g fill=\"none\" fill-rule=\"evenodd\" stroke=\"#000\" … |
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+ case 'K': s = "<use href=\"#wk\"/>"; break; |
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+ case 'Q': s = "<use href=\"#wq\"/>"; break; |
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+ case 'R': s = "<use href=\"#wr\"/>"; break; |
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+ case 'B': s = "<use href=\"#wb\"/>"; break; |
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+ case 'N': s = "<use href=\"#wn\"/>"; break; |
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case 'P': s = "<use href=\"#pawn\" fill=\"#fff\"/>"; break; |
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- case 'k': s = "<g fill=\"none\" fill-rule=\"evenodd\" stroke=\"#000\" … |
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- case 'q': s = "<g fill-rule=\"evenodd\" stroke=\"#000\" stroke-width=\… |
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- case 'r': s = "<g fill-rule=\"evenodd\" stroke=\"#000\" stroke-width=\… |
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- case 'b': s = "<g fill=\"none\" fill-rule=\"evenodd\" stroke=\"#000\" … |
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- case 'n': s = "<g fill=\"none\" fill-rule=\"evenodd\" stroke=\"#000\" … |
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+ case 'k': s = "<use href=\"#bk\"/>"; break; |
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+ case 'q': s = "<use href=\"#bq\"/>"; break; |
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+ case 'r': s = "<use href=\"#br\"/>"; break; |
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+ case 'b': s = "<use href=\"#bb\"/>"; break; |
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+ case 'n': s = "<use href=\"#bn\"/>"; break; |
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case 'p': s = "<use href=\"#pawn\" fill=\"#000\"/>"; break; |
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} |
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@@ -190,16 +190,55 @@ showpiece_svg(int c) |
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void |
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output_svg(void) |
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{ |
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+ const char *s; |
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+ char pieces[] = "pPKQRBNkqrbn"; /* pieces, check if they are used for … |
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+ unsigned char pieceused[sizeof("pPKQRBNkqrbn")]; |
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const int *color; |
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- int ix, iy, x, y, piece; |
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+ int i, ix, iy, x, y, piece; |
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fputs("<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\"?>\n" |
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"<!DOCTYPE svg PUBLIC \"-//W3C//DTD SVG 1.1//EN\" \"http://www… |
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"<svg width=\"360\" height=\"360\" viewBox=\"0 0 360 360\" xml… |
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"<rect fill=\"#fff\" stroke=\"#000\" x=\"0\" y=\"0\" width=\"3… |
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+ memset(pieceused, 0, sizeof(pieceused)); |
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+ for (i = 0; i < sizeof(pieces) / sizeof(pieces[0]); i++) { |
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+ for (y = 0; y < 8 && !pieceused[i]; y++) { |
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+ for (x = 0; x < 8; x++) { |
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+ if (getpiece(x, y) == pieces[i]) { |
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+ pieceused[i] = 1; |
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+ break; |
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+ } |
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+ } |
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+ } |
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+ } |
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+ |
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fputs("<defs>\n", stdout); |
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- fputs("<path id=\"pawn\" d=\"M22.5 9c-2.21 0-4 1.79-4 4 0 .89.29 1.71.… |
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+ for (i = 0; i < sizeof(pieces) / sizeof(pieces[0]); i++) { |
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+ if (!pieceused[i]) |
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+ continue; |
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+ s = NULL; |
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+ switch (pieces[i]) { |
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+ case 'K': s ="<g id=\"wk\" fill=\"none\" fill-rule=\"evenodd\… |
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+ case 'Q': s = "<g id=\"wq\" fill=\"#fff\" fill-rule=\"evenodd\… |
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+ case 'R': s = "<g id=\"wr\" fill=\"#fff\" fill-rule=\"evenodd\… |
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+ case 'B': s = "<g id=\"wb\" fill=\"none\" fill-rule=\"evenodd\… |
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+ case 'N': s = "<g id=\"wn\" fill=\"none\" fill-rule=\"evenodd\… |
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+ case 'P': |
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+ case 'p': |
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+ s = "<path id=\"pawn\" d=\"M22.5 9c-2.21 0-4 1.79-4 4 … |
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+ pieceused[0] = pieceused[1] = 0; /* unset used, only o… |
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+ break; |
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+ case 'k': s = "<g id=\"bk\" fill=\"none\" fill-rule=\"evenodd\… |
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+ case 'q': s = "<g id=\"bq\" fill-rule=\"evenodd\" stroke=\"#00… |
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+ case 'r': s = "<g id=\"br\" fill-rule=\"evenodd\" stroke=\"#00… |
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+ case 'b': s = "<g id=\"bb\" fill=\"none\" fill-rule=\"evenodd\… |
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+ case 'n': s = "<g id=\"bn\" fill=\"none\" fill-rule=\"evenodd\… |
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+ default: break; |
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+ } |
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+ if (s) |
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+ fputs(s, stdout); |
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+ } |
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fputs("</defs>\n", stdout); |
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for (iy = 0; iy < 8; iy++) { |
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@@ -529,12 +568,17 @@ ischecked(int side) |
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return 0; |
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} |
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+/* TODO */ |
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int |
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ischeckmated(int side) |
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{ |
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int kingx, kingy; |
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// TODO: can king move out check, without being checked? |
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+ // TODO: can a piece defend it. |
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+ // TODO: can the checking piece get taken without still being checked? |
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+ // TODO: handle double-checks. |
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+ // TODO: separate board state or just move and undo move? |
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if (!ischecked(side)) |
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return 0; |
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@@ -543,10 +587,7 @@ ischeckmated(int side) |
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if (!findking(side, &kingx, &kingy)) |
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return 0; /* should not happen */ |
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- // TODO: can the king move? move it and check if it is not checked |
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- // TODO: separate board state or just move and undo move? |
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- |
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- return 0; // TODO |
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+ return 0; |
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} |
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void |
