option to flip the board - chess-puzzles - chess puzzle book generator
(HTM) git clone git://git.codemadness.org/chess-puzzles
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---
(DIR) commit 3d921c8e0e2011ae994e508e89fc71086fffd598
(DIR) parent 3c9f4a2be304b3f0d197d69bea715ee0c9e29570
(HTM) Author: Hiltjo Posthuma <hiltjo@codemadness.org>
Date: Wed, 20 Dec 2023 21:54:11 +0100
option to flip the board
Diffstat:
M fen_to_svg.c | 115 +++++++++++++++++++++----------
1 file changed, 80 insertions(+), 35 deletions(-)
---
(DIR) diff --git a/fen_to_svg.c b/fen_to_svg.c
@@ -1,4 +1,4 @@
-/* TODO: option to flip board? */
+/* TODO: output for PGN notation for moves */
#include <ctype.h>
#include <stdio.h>
@@ -26,7 +26,8 @@ static const int lightsquare[] = { 0xf0, 0xd9, 0xb5 };
static const int darksquarehi[] = { 0xaa, 0xa2, 0x3a };
static const int lightsquarehi[] = { 0xcd, 0xd2, 0x6a };
-static const int showcoords = 1; /* config: show board coordinates? */
+static int showcoords = 1; /* config: show board coordinates? */
+static int flipboard = 0; /* config: flip board ? */
int
isvalidsquare(int x, int y)
@@ -159,7 +160,7 @@ void
svg_showboard(void)
{
const int *color;
- int x, y, piece;
+ int ix, iy, x, y, piece;
fputs("<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\"?>\n"
"<!DOCTYPE svg PUBLIC \"-//W3C//DTD SVG 1.1//EN\" \"http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd\">\n"
@@ -170,8 +171,12 @@ svg_showboard(void)
showboardfen();
fputs(" -->\n", stdout);
- for (y = 0; y < 8; y++) {
- for (x = 0; x < 8; x++) {
+ for (iy = 0; iy < 8; iy++) {
+ y = flipboard ? 7 - iy : iy;
+
+ for (ix = 0; ix < 8; ix++) {
+ x = flipboard ? 7 - ix : ix;
+
if (x % 2 == 0) {
if (y % 2 == 0)
color = highlight[y][x] ? lightsquarehi : lightsquare;
@@ -185,11 +190,11 @@ svg_showboard(void)
}
printf("<g><rect x=\"%d\" y=\"%d\" width=\"45\" height=\"45\" fill=\"#%02x%02x%02x\"/></g>\n",
- x * 45, y * 45, color[0], color[1], color[2]);
+ ix * 45, iy * 45, color[0], color[1], color[2]);
piece = getpiece(x, y);
if (piece) {
- printf("<g transform=\"translate(%d %d)\">", x * 45, y * 45);
+ printf("<g transform=\"translate(%d %d)\">", ix * 45, iy * 45);
svg_showpiece(piece);
fputs("</g>\n", stdout);
}
@@ -197,23 +202,47 @@ svg_showboard(void)
}
if (showcoords) {
- x = 7;
- for (y = 0; y < 8; y++) {
- if (y % 2 == 0)
- color = highlight[y][x] ? lightsquarehi : lightsquare;
- else
- color = highlight[y][x] ? darksquarehi : darksquare;
+ ix = 7;
+ x = flipboard ? 0 : 7;
+ for (iy = 0; iy < 8; iy++) {
+ y = flipboard ? 7 - iy : iy;
+
+ /* inverse square color for text */
+ if (x % 2 == 0) {
+ if (y % 2 == 0)
+ color = highlight[y][x] ? darksquarehi : darksquare;
+ else
+ color = highlight[y][x] ? lightsquarehi : lightsquare;
+ } else {
+ if (y % 2 == 0)
+ color = highlight[y][x] ? lightsquarehi : lightsquare;
+ else
+ color = highlight[y][x] ? darksquarehi : darksquare;
+ }
+
printf("<text x=\"%d\" y=\"%d\" fill=\"#%02x%02x%02x\" text-anchor=\"end\" style=\"font-family: sans-serif; font-size: 10px\">%c</text>\n",
- (x + 1) * 45 - 2, (y * 45) + 10, color[0], color[1], color[2], '8' - y);
+ (ix + 1) * 45 - 2, (iy * 45) + 10, color[0], color[1], color[2], '8' - y);
}
- y = 7;
- for (x = 0; x < 8; x++) {
- if (x % 2 == 0)
- color = highlight[y][x] ? lightsquarehi : lightsquare;
- else
- color = highlight[y][x] ? darksquarehi : darksquare;
+ iy = 7;
+ y = flipboard ? 0 : 7;
+ for (ix = 0; ix < 8; ix++) {
+ x = flipboard ? 7 - ix : ix;
+
+ /* inverse square color for text */
+ if (x % 2 == 0) {
+ if (y % 2 == 0)
+ color = highlight[y][x] ? darksquarehi : darksquare;
+ else
+ color = highlight[y][x] ? lightsquarehi : lightsquare;
+ } else {
+ if (y % 2 == 0)
+ color = highlight[y][x] ? lightsquarehi : lightsquare;
+ else
+ color = highlight[y][x] ? darksquarehi : darksquare;
+ }
+
printf("<text x=\"%d\" y=\"%d\" fill=\"#%02x%02x%02x\" text-anchor=\"start\" style=\"font-family: sans-serif; font-size: 10px\">%c</text>\n",
- (x * 45) + 2, (y + 1) * 45 - 3, color[0], color[1], color[2], x + 'a');
+ (ix * 45) + 2, (iy + 1) * 45 - 3, color[0], color[1], color[2], x + 'a');
}
}
@@ -255,7 +284,7 @@ void
tty_showboard(void)
{
const int *color;
- int x, y, piece;
+ int ix, iy, x, y, piece;
printf("Board FEN:\n");
showboardfen();
@@ -271,13 +300,17 @@ tty_showboard(void)
SETFGCOLOR(0x00, 0x00, 0x00);
putchar('\n');
- for (y = 0; y < 8; y++) {
+ for (iy = 0; iy < 8; iy++) {
+ y = flipboard ? 7 - iy : iy;
+
color = border;
SETBGCOLOR(color[0], color[1], color[2]);
SETFGCOLOR(0xff, 0xff, 0xff);
fputs(" ", stdout);
- for (x = 0; x < 8; x++) {
+ for (ix = 0; ix < 8; ix++) {
+ x = flipboard ? 7 - ix : ix;
+
if (x % 2 == 0) {
if (y % 2 == 0)
color = highlight[y][x] ? lightsquarehi : lightsquare;
@@ -326,10 +359,14 @@ tty_showboard(void)
color = border;
SETBGCOLOR(color[0], color[1], color[2]);
SETFGCOLOR(0xff, 0xff, 0xff);
- if (showcoords)
- fputs(" a b c d e f g h ", stdout);
- else
+ if (showcoords) {
+ if (flipboard)
+ fputs(" h g f e d c b a ", stdout);
+ else
+ fputs(" a b c d e f g h ", stdout);
+ } else {
fputs(" ", stdout);
+ }
printf("\x1b[0m"); /* reset */
printf("\n");
}
@@ -355,15 +392,19 @@ ascii_showboard(void)
int hi[3] = { '>', ' ', '<' };
int dark[3] = { '.', '.', '.' };
int light[3] = { ' ', ' ', ' ' };
- int *color, x, y, piece;
+ int *color, ix, iy, x, y, piece;
printf("Board FEN:\n");
showboardfen();
printf("\n\n");
- for (y = 0; y < 8; y++) {
+ for (iy = 0; iy < 8; iy++) {
+ y = flipboard ? 7 - iy : iy;
+
fputs("+---+---+---+---+---+---+---+---+\n", stdout);
- for (x = 0; x < 8; x++) {
+ for (ix = 0; ix < 8; ix++) {
+ x = flipboard ? 7 - ix : ix;
+
if (x % 2 == 0) {
if (y % 2 == 0)
color = highlight[y][x] ? hi : light;
@@ -375,8 +416,8 @@ ascii_showboard(void)
else
color = highlight[y][x] ? hi : light;
}
-
- if (x == 0)
+
+ if (ix == 0)
putchar('|');
putchar(color[0]);
piece = getpiece(x, y);
@@ -394,8 +435,12 @@ ascii_showboard(void)
putchar('\n');
}
fputs("+---+---+---+---+---+---+---+---+\n", stdout);
- if (showcoords)
- printf(" a | b | c | d | e | f | g | h |\n");
+ if (showcoords) {
+ if (flipboard)
+ printf(" h | g | f | e | d | c | b | a |\n");
+ else
+ printf(" a | b | c | d | e | f | g | h |\n");
+ }
fputs("\n", stdout);
}
@@ -467,7 +512,7 @@ main(int argc, char *argv[])
black_can_castle[1] = 1;
}
break;
- case 3: /* TODO: en-passant square, rest of the fields */
+ case 3: /* en passant square */
if (*s >= 'a' && *s <= 'h' &&
*(s + 1) >= '1' && *(s + 1) >= '6') {