X-Git-Url: http://www.aleph1.co.uk/gitweb/?p=yaffs-website;a=blobdiff_plain;f=vendor%2Fphenx%2Fphp-font-lib%2Fsrc%2FFontLib%2FTable%2FType%2Fcmap.php;fp=vendor%2Fphenx%2Fphp-font-lib%2Fsrc%2FFontLib%2FTable%2FType%2Fcmap.php;h=562f51ea93a73992939ed27bcbb74f424e39959c;hp=0000000000000000000000000000000000000000;hb=0bf8d09d2542548982e81a441b1f16e75873a04f;hpb=74df008bdbb3a11eeea356744f39b802369bda3c

diff --git a/vendor/phenx/php-font-lib/src/FontLib/Table/Type/cmap.php b/vendor/phenx/php-font-lib/src/FontLib/Table/Type/cmap.php
new file mode 100644
index 000000000..562f51ea9
--- /dev/null
+++ b/vendor/phenx/php-font-lib/src/FontLib/Table/Type/cmap.php
@@ -0,0 +1,258 @@
+<?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
+ */
+
+namespace FontLib\Table\Type;
+use FontLib\Table\Table;
+
+/**
+ * `cmap` font table.
+ *
+ * @package php-font-lib
+ */
+class cmap extends Table {
+  private static $header_format = array(
+    "version"         => self::uint16,
+    "numberSubtables" => self::uint16,
+  );
+
+  private static $subtable_header_format = array(
+    "platformID"         => self::uint16,
+    "platformSpecificID" => self::uint16,
+    "offset"             => self::uint32,
+  );
+
+  private static $subtable_v4_format = array(
+    "length"        => self::uint16,
+    "language"      => self::uint16,
+    "segCountX2"    => self::uint16,
+    "searchRange"   => self::uint16,
+    "entrySelector" => self::uint16,
+    "rangeShift"    => self::uint16,
+  );
+
+  protected function _parse() {
+    $font = $this->getFont();
+
+    $cmap_offset = $font->pos();
+
+    $data = $font->unpack(self::$header_format);
+
+    $subtables = array();
+    for ($i = 0; $i < $data["numberSubtables"]; $i++) {
+      $subtables[] = $font->unpack(self::$subtable_header_format);
+    }
+    $data["subtables"] = $subtables;
+
+    foreach ($data["subtables"] as $i => &$subtable) {
+      $font->seek($cmap_offset + $subtable["offset"]);
+
+      $subtable["format"] = $font->readUInt16();
+
+      // @todo Only CMAP version 4
+      if ($subtable["format"] != 4) {
+        unset($data["subtables"][$i]);
+        $data["numberSubtables"]--;
+        continue;
+      }
+
+      $subtable += $font->unpack(self::$subtable_v4_format);
+      $segCount             = $subtable["segCountX2"] / 2;
+      $subtable["segCount"] = $segCount;
+
+      $endCode = $font->readUInt16Many($segCount);
+
+      $font->readUInt16(); // reservedPad
+
+      $startCode = $font->readUInt16Many($segCount);
+      $idDelta   = $font->readInt16Many($segCount);
+
+      $ro_start      = $font->pos();
+      $idRangeOffset = $font->readUInt16Many($segCount);
+
+      $glyphIndexArray = array();
+      for ($i = 0; $i < $segCount; $i++) {
+        $c1 = $startCode[$i];
+        $c2 = $endCode[$i];
+        $d  = $idDelta[$i];
+        $ro = $idRangeOffset[$i];
+
+        if ($ro > 0) {
+          $font->seek($subtable["offset"] + 2 * $i + $ro);
+        }
+
+        for ($c = $c1; $c <= $c2; $c++) {
+          if ($ro == 0) {
+            $gid = ($c + $d) & 0xFFFF;
+          }
+          else {
+            $offset = ($c - $c1) * 2 + $ro;
+            $offset = $ro_start + 2 * $i + $offset;
+
+            $font->seek($offset);
+            $gid = $font->readUInt16();
+
+            if ($gid != 0) {
+              $gid = ($gid + $d) & 0xFFFF;
+            }
+          }
+
+          if ($gid > 0) {
+            $glyphIndexArray[$c] = $gid;
+          }
+        }
+      }
+
+      $subtable += array(
+        "endCode"         => $endCode,
+        "startCode"       => $startCode,
+        "idDelta"         => $idDelta,
+        "idRangeOffset"   => $idRangeOffset,
+        "glyphIndexArray" => $glyphIndexArray,
+      );
+    }
+
+    $this->data = $data;
+  }
+
+  function _encode() {
+    $font = $this->getFont();
+
+    $subset          = $font->getSubset();
+    $glyphIndexArray = $font->getUnicodeCharMap();
+
+    $newGlyphIndexArray = array();
+    foreach ($glyphIndexArray as $code => $gid) {
+      $new_gid = array_search($gid, $subset);
+      if ($new_gid !== false) {
+        $newGlyphIndexArray[$code] = $new_gid;
+      }
+    }
+
+    ksort($newGlyphIndexArray); // Sort by char code
+
+    $segments = array();
+
+    $i        = -1;
+    $prevCode = 0xFFFF;
+    $prevGid  = 0xFFFF;
+
+    foreach ($newGlyphIndexArray as $code => $gid) {
+      if (
+        $prevCode + 1 != $code ||
+        $prevGid + 1 != $gid
+      ) {
+        $i++;
+        $segments[$i] = array();
+      }
+
+      $segments[$i][] = array($code, $gid);
+
+      $prevCode = $code;
+      $prevGid  = $gid;
+    }
+
+    $segments[][] = array(0xFFFF, 0xFFFF);
+
+    $startCode = array();
+    $endCode   = array();
+    $idDelta   = array();
+
+    foreach ($segments as $codes) {
+      $start = reset($codes);
+      $end   = end($codes);
+
+      $startCode[] = $start[0];
+      $endCode[]   = $end[0];
+      $idDelta[]   = $start[1] - $start[0];
+    }
+
+    $segCount      = count($startCode);
+    $idRangeOffset = array_fill(0, $segCount, 0);
+
+    $searchRange   = 1;
+    $entrySelector = 0;
+    while ($searchRange * 2 <= $segCount) {
+      $searchRange *= 2;
+      $entrySelector++;
+    }
+    $searchRange *= 2;
+    $rangeShift = $segCount * 2 - $searchRange;
+
+    $subtables = array(
+      array(
+        // header
+        "platformID"         => 3, // Unicode
+        "platformSpecificID" => 1,
+        "offset"             => null,
+
+        // subtable
+        "format"             => 4,
+        "length"             => null,
+        "language"           => 0,
+        "segCount"           => $segCount,
+        "segCountX2"         => $segCount * 2,
+        "searchRange"        => $searchRange,
+        "entrySelector"      => $entrySelector,
+        "rangeShift"         => $rangeShift,
+        "startCode"          => $startCode,
+        "endCode"            => $endCode,
+        "idDelta"            => $idDelta,
+        "idRangeOffset"      => $idRangeOffset,
+        "glyphIndexArray"    => $newGlyphIndexArray,
+      )
+    );
+
+    $data = array(
+      "version"         => 0,
+      "numberSubtables" => count($subtables),
+      "subtables"       => $subtables,
+    );
+
+    $length = $font->pack(self::$header_format, $data);
+
+    $subtable_headers_size   = $data["numberSubtables"] * 8; // size of self::$subtable_header_format
+    $subtable_headers_offset = $font->pos();
+
+    $length += $font->write(str_repeat("\0", $subtable_headers_size), $subtable_headers_size);
+
+    // write subtables data
+    foreach ($data["subtables"] as $i => $subtable) {
+      $length_before                   = $length;
+      $data["subtables"][$i]["offset"] = $length;
+
+      $length += $font->writeUInt16($subtable["format"]);
+
+      $before_subheader = $font->pos();
+      $length += $font->pack(self::$subtable_v4_format, $subtable);
+
+      $segCount = $subtable["segCount"];
+      $length += $font->w(array(self::uint16, $segCount), $subtable["endCode"]);
+      $length += $font->writeUInt16(0); // reservedPad
+      $length += $font->w(array(self::uint16, $segCount), $subtable["startCode"]);
+      $length += $font->w(array(self::int16, $segCount), $subtable["idDelta"]);
+      $length += $font->w(array(self::uint16, $segCount), $subtable["idRangeOffset"]);
+      $length += $font->w(array(self::uint16, $segCount), array_values($subtable["glyphIndexArray"]));
+
+      $after_subtable = $font->pos();
+
+      $subtable["length"] = $length - $length_before;
+      $font->seek($before_subheader);
+      $length += $font->pack(self::$subtable_v4_format, $subtable);
+
+      $font->seek($after_subtable);
+    }
+
+    // write subtables headers
+    $font->seek($subtable_headers_offset);
+    foreach ($data["subtables"] as $subtable) {
+      $font->pack(self::$subtable_header_format, $subtable);
+    }
+
+    return $length;
+  }
+}