--- /dev/null
+<?php
+/**
+ * @package php-font-lib
+ * @link https://github.com/PhenX/php-font-lib
+ * @author Fabien Ménager <fabien.menager@gmail.com>
+ * @license http://www.gnu.org/copyleft/lesser.html GNU Lesser General Public License
+ * @version $Id: Font_Table_glyf.php 46 2012-04-02 20:22:38Z fabien.menager $
+ */
+
+namespace FontLib\Glyph;
+
+/**
+ * `glyf` font table.
+ *
+ * @package php-font-lib
+ */
+class OutlineSimple extends Outline {
+ const ON_CURVE = 0x01;
+ const X_SHORT_VECTOR = 0x02;
+ const Y_SHORT_VECTOR = 0x04;
+ const REPEAT = 0x08;
+ const THIS_X_IS_SAME = 0x10;
+ const THIS_Y_IS_SAME = 0x20;
+
+ public $instructions;
+ public $points;
+
+ function parseData() {
+ parent::parseData();
+
+ if (!$this->size) {
+ return;
+ }
+
+ $font = $this->getFont();
+
+ $noc = $this->numberOfContours;
+
+ if ($noc == 0) {
+ return;
+ }
+
+ $endPtsOfContours = $font->r(array(self::uint16, $noc));
+
+ $instructionLength = $font->readUInt16();
+ $this->instructions = $font->r(array(self::uint8, $instructionLength));
+
+ $count = $endPtsOfContours[$noc - 1] + 1;
+
+ // Flags
+ $flags = array();
+ for ($index = 0; $index < $count; $index++) {
+ $flags[$index] = $font->readUInt8();
+
+ if ($flags[$index] & self::REPEAT) {
+ $repeats = $font->readUInt8();
+
+ for ($i = 1; $i <= $repeats; $i++) {
+ $flags[$index + $i] = $flags[$index];
+ }
+
+ $index += $repeats;
+ }
+ }
+
+ $points = array();
+ foreach ($flags as $i => $flag) {
+ $points[$i]["onCurve"] = $flag & self::ON_CURVE;
+ $points[$i]["endOfContour"] = in_array($i, $endPtsOfContours);
+ }
+
+ // X Coords
+ $x = 0;
+ for ($i = 0; $i < $count; $i++) {
+ $flag = $flags[$i];
+
+ if ($flag & self::THIS_X_IS_SAME) {
+ if ($flag & self::X_SHORT_VECTOR) {
+ $x += $font->readUInt8();
+ }
+ }
+ else {
+ if ($flag & self::X_SHORT_VECTOR) {
+ $x -= $font->readUInt8();
+ }
+ else {
+ $x += $font->readInt16();
+ }
+ }
+
+ $points[$i]["x"] = $x;
+ }
+
+ // Y Coords
+ $y = 0;
+ for ($i = 0; $i < $count; $i++) {
+ $flag = $flags[$i];
+
+ if ($flag & self::THIS_Y_IS_SAME) {
+ if ($flag & self::Y_SHORT_VECTOR) {
+ $y += $font->readUInt8();
+ }
+ }
+ else {
+ if ($flag & self::Y_SHORT_VECTOR) {
+ $y -= $font->readUInt8();
+ }
+ else {
+ $y += $font->readInt16();
+ }
+ }
+
+ $points[$i]["y"] = $y;
+ }
+
+ $this->points = $points;
+ }
+
+ public function splitSVGPath($path) {
+ preg_match_all('/([a-z])|(-?\d+(?:\.\d+)?)/i', $path, $matches, PREG_PATTERN_ORDER);
+
+ return $matches[0];
+ }
+
+ public function makePoints($path) {
+ $path = $this->splitSVGPath($path);
+ $l = count($path);
+ $i = 0;
+
+ $points = array();
+
+ while ($i < $l) {
+ switch ($path[$i]) {
+ // moveTo
+ case "M":
+ $points[] = array(
+ "onCurve" => true,
+ "x" => $path[++$i],
+ "y" => $path[++$i],
+ "endOfContour" => false,
+ );
+ break;
+
+ // lineTo
+ case "L":
+ $points[] = array(
+ "onCurve" => true,
+ "x" => $path[++$i],
+ "y" => $path[++$i],
+ "endOfContour" => false,
+ );
+ break;
+
+ // quadraticCurveTo
+ case "Q":
+ $points[] = array(
+ "onCurve" => false,
+ "x" => $path[++$i],
+ "y" => $path[++$i],
+ "endOfContour" => false,
+ );
+ $points[] = array(
+ "onCurve" => true,
+ "x" => $path[++$i],
+ "y" => $path[++$i],
+ "endOfContour" => false,
+ );
+ break;
+
+ // closePath
+ /** @noinspection PhpMissingBreakStatementInspection */
+ case "z":
+ $points[count($points) - 1]["endOfContour"] = true;
+
+ default:
+ $i++;
+ break;
+ }
+ }
+
+ return $points;
+ }
+
+ function encode() {
+ if (empty($this->points)) {
+ return parent::encode();
+ }
+
+ return $this->size = $this->encodePoints($this->points);
+ }
+
+ public function encodePoints($points) {
+ $endPtsOfContours = array();
+ $flags = array();
+ $coords_x = array();
+ $coords_y = array();
+
+ $last_x = 0;
+ $last_y = 0;
+ $xMin = $yMin = 0xFFFF;
+ $xMax = $yMax = -0xFFFF;
+ foreach ($points as $i => $point) {
+ $flag = 0;
+ if ($point["onCurve"]) {
+ $flag |= self::ON_CURVE;
+ }
+
+ if ($point["endOfContour"]) {
+ $endPtsOfContours[] = $i;
+ }
+
+ // Simplified, we could do some optimizations
+ if ($point["x"] == $last_x) {
+ $flag |= self::THIS_X_IS_SAME;
+ }
+ else {
+ $x = intval($point["x"]);
+ $xMin = min($x, $xMin);
+ $xMax = max($x, $xMax);
+ $coords_x[] = $x - $last_x; // int16
+ }
+
+ // Simplified, we could do some optimizations
+ if ($point["y"] == $last_y) {
+ $flag |= self::THIS_Y_IS_SAME;
+ }
+ else {
+ $y = intval($point["y"]);
+ $yMin = min($y, $yMin);
+ $yMax = max($y, $yMax);
+ $coords_y[] = $y - $last_y; // int16
+ }
+
+ $flags[] = $flag;
+ $last_x = $point["x"];
+ $last_y = $point["y"];
+ }
+
+ $font = $this->getFont();
+
+ $l = 0;
+ $l += $font->writeInt16(count($endPtsOfContours)); // endPtsOfContours
+ $l += $font->writeFWord(isset($this->xMin) ? $this->xMin : $xMin); // xMin
+ $l += $font->writeFWord(isset($this->yMin) ? $this->yMin : $yMin); // yMin
+ $l += $font->writeFWord(isset($this->xMax) ? $this->xMax : $xMax); // xMax
+ $l += $font->writeFWord(isset($this->yMax) ? $this->yMax : $yMax); // yMax
+
+ // Simple glyf
+ $l += $font->w(array(self::uint16, count($endPtsOfContours)), $endPtsOfContours); // endPtsOfContours
+ $l += $font->writeUInt16(0); // instructionLength
+ $l += $font->w(array(self::uint8, count($flags)), $flags); // flags
+ $l += $font->w(array(self::int16, count($coords_x)), $coords_x); // xCoordinates
+ $l += $font->w(array(self::int16, count($coords_y)), $coords_y); // yCoordinates
+ return $l;
+ }
+
+ public function getSVGContours($points = null) {
+ $path = "";
+
+ if (!$points) {
+ if (empty($this->points)) {
+ $this->parseData();
+ }
+
+ $points = $this->points;
+ }
+
+ $length = count($points);
+ $firstIndex = 0;
+ $count = 0;
+
+ for ($i = 0; $i < $length; $i++) {
+ $count++;
+
+ if ($points[$i]["endOfContour"]) {
+ $path .= $this->getSVGPath($points, $firstIndex, $count);
+ $firstIndex = $i + 1;
+ $count = 0;
+ }
+ }
+
+ return $path;
+ }
+
+ protected function getSVGPath($points, $startIndex, $count) {
+ $offset = 0;
+ $path = "";
+
+ while ($offset < $count) {
+ $point = $points[$startIndex + $offset % $count];
+ $point_p1 = $points[$startIndex + ($offset + 1) % $count];
+
+ if ($offset == 0) {
+ $path .= "M{$point['x']},{$point['y']} ";
+ }
+
+ if ($point["onCurve"]) {
+ if ($point_p1["onCurve"]) {
+ $path .= "L{$point_p1['x']},{$point_p1['y']} ";
+ $offset++;
+ }
+ else {
+ $point_p2 = $points[$startIndex + ($offset + 2) % $count];
+
+ if ($point_p2["onCurve"]) {
+ $path .= "Q{$point_p1['x']},{$point_p1['y']},{$point_p2['x']},{$point_p2['y']} ";
+ }
+ else {
+ $path .= "Q{$point_p1['x']},{$point_p1['y']}," . $this->midValue($point_p1['x'], $point_p2['x']) . "," . $this->midValue($point_p1['y'], $point_p2['y']) . " ";
+ }
+
+ $offset += 2;
+ }
+ }
+ else {
+ if ($point_p1["onCurve"]) {
+ $path .= "Q{$point['x']},{$point['y']},{$point_p1['x']},{$point_p1['y']} ";
+ }
+ else {
+ $path .= "Q{$point['x']},{$point['y']}," . $this->midValue($point['x'], $point_p1['x']) . "," . $this->midValue($point['y'], $point_p1['y']) . " ";
+ }
+
+ $offset++;
+ }
+ }
+
+ $path .= "z ";
+
+ return $path;
+ }
+
+ function midValue($a, $b) {
+ return $a + ($b - $a) / 2;
+ }
+}
\ No newline at end of file
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