335 lines
8.2 KiB
PHP
335 lines
8.2 KiB
PHP
<?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;
|
|
}
|
|
} |