113 lines
4.3 KiB
PHP
113 lines
4.3 KiB
PHP
<?php
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header ("Content-type: image/png");
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const UNKNOWN = ".";
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$gridStr = strip_tags($_GET['grid']);
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$size = (int) $_GET['size'];
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$thumbnail = imagecreate($size, $size);
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$transparent = imagecolorallocate($thumbnail, 1, 1, 1);
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imagecolortransparent($thumbnail, $transparent);
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$black = imagecolorallocate($thumbnail, 0, 0, 0);
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$grey = imagecolorallocate($thumbnail, 128, 128, 128);
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$blue = imagecolorallocate($thumbnail, 102, 102, 255);
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$white = imagecolorallocate($thumbnail, 255, 255, 255);
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if ($size <= 36) {
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$boxSize = floor(($size-4) / 9);
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$gridSize = 9*$boxSize + 4;
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$start = floor(($size-$gridSize) / 2);
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$end = $start + $gridSize;
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$lineStart = $start + 1;
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$lineEnd = $end - 2;
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for ($i = $start; $i < $end; $i += 3*$boxSize + 1) {
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ImageLine($thumbnail, $lineStart, $i, $lineEnd, $i, $black);
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ImageLine($thumbnail, $i, $lineStart, $i, $lineEnd, $black);
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}
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$x = $start;
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$y = $start;
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$boxSizeMinusOne = $boxSize - 1;
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foreach(str_split($gridStr) as $i => $value) {
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if ($i % 3 == 0) $x++;
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if ($i % 27 == 0) $y++;
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if ($value == UNKNOWN) {
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$bgColor = $white;
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} else {
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$bgColor = $blue;
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}
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imagefilledrectangle($thumbnail, $x, $y, $x+$boxSizeMinusOne, $y+$boxSizeMinusOne, $bgColor);
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$x += $boxSize;
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if ($i % 9 == 8) {
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$y += $boxSize;
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$x = $start;
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}
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}
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} else if ($size < 82) {
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$boxSize = floor(($size-1) / 9);
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$gridSize = 9*$boxSize + 1;
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$start = floor(($size-$gridSize) / 2);
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$end = $start + $gridSize;
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$lineStart = $start + 1;
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$lineEnd = $end - 2;
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for ($i = $start + $boxSize; $i < $end - $boxSize; $i += $boxSize) {
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ImageLine($thumbnail, $lineStart, $i, $lineEnd, $i, $grey);
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ImageLine($thumbnail, $i, $lineStart, $i, $lineEnd, $grey);
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}
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for ($i = $start; $i < $end; $i += 3*$boxSize) {
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ImageLine($thumbnail, $lineStart, $i, $lineEnd, $i, $black);
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ImageLine($thumbnail, $i, $lineStart, $i, $lineEnd, $black);
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}
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$x = $start + 1;
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$y = $start + 1;
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$boxSizeMinusTwo = $boxSize - 2;
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foreach(str_split($gridStr) as $i => $value) {
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if ($value == UNKNOWN) {
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$bgColor = $white;
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} else {
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$bgColor = $blue;
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}
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imagefilledrectangle($thumbnail, $x, $y, $x+$boxSizeMinusTwo, $y+$boxSizeMinusTwo, $bgColor);
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$x += $boxSize;
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if ($i % 9 == 8) {
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$y += $boxSize;
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$x = $start + 1;
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}
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}
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} else {
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$boxSize = floor(($size-1) / 9);
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$gridSize = 9*$boxSize + 1;
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$start = floor(($size-$gridSize) / 2);
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$end = $start + $gridSize;
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$lineStart = $start + 1;
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$lineEnd = $end - 2;
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$fontSize = floor($boxSize/2) - 4;
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$fdx = floor(($boxSize - imagefontwidth($fontSize)) / 2);
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$fdy = ceil(($boxSize - imagefontheight($fontSize)) / 2) - 1;
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$fontColor = $white;
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for ($i = $start + $boxSize; $i < $end - $boxSize; $i += $boxSize) {
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ImageLine($thumbnail, $lineStart, $i, $lineEnd, $i, $grey);
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ImageLine($thumbnail, $i, $lineStart, $i, $lineEnd, $grey);
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}
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for ($i = $start; $i < $end; $i += 3*$boxSize) {
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ImageLine($thumbnail, $lineStart, $i, $lineEnd, $i, $black);
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ImageLine($thumbnail, $i, $lineStart, $i, $lineEnd, $black);
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}
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$x = $start + 1;
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$y = $start + 1;
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$boxSizeMinusTwo = $boxSize - 2;
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foreach(str_split($gridStr) as $i => $value) {
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if ($value == UNKNOWN) {
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$bgColor = $white;
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} else {
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$bgColor = $blue;
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}
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imagefilledrectangle($thumbnail, $x, $y, $x+$boxSizeMinusTwo, $y+$boxSizeMinusTwo, $bgColor);
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if ($value != UNKNOWN) imagestring($thumbnail, $fontSize, $x + $fdx, $y + $fdy, $value, $fontColor);
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$x += $boxSize;
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if ($i % 9 == 8) {
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$y += $boxSize;
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$x = $start + 1;
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}
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}
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}
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imagepng($thumbnail);
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?>
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