www.aleph1.co.uk Git - yaffs-website/blob - vendor/phenx/php-font-lib/src/FontLib/Glyph/OutlineComposite.php

   1 <?php
   2 /**
   3  * @package php-font-lib
   4  * @link    https://github.com/PhenX/php-font-lib
   5  * @author  Fabien Ménager <fabien.menager@gmail.com>
   6  * @license http://www.gnu.org/copyleft/lesser.html GNU Lesser General Public License
   7  * @version $Id: Font_Table_glyf.php 46 2012-04-02 20:22:38Z fabien.menager $
   8  */
   9
  10 namespace FontLib\Glyph;
  11
  12 /**
  13  * Composite glyph outline
  14  *
  15  * @package php-font-lib
  16  */
  17 class OutlineComposite extends Outline {
  18   const ARG_1_AND_2_ARE_WORDS    = 0x0001;
  19   const ARGS_ARE_XY_VALUES       = 0x0002;
  20   const ROUND_XY_TO_GRID         = 0x0004;
  21   const WE_HAVE_A_SCALE          = 0x0008;
  22   const MORE_COMPONENTS          = 0x0020;
  23   const WE_HAVE_AN_X_AND_Y_SCALE = 0x0040;
  24   const WE_HAVE_A_TWO_BY_TWO     = 0x0080;
  25   const WE_HAVE_INSTRUCTIONS     = 0x0100;
  26   const USE_MY_METRICS           = 0x0200;
  27   const OVERLAP_COMPOUND         = 0x0400;
  28
  29   /**
  30    * @var OutlineComponent[]
  31    */
  32   public $components = array();
  33
  34   function getGlyphIDs() {
  35     if (empty($this->components)) {
  36       $this->parseData();
  37     }
  38
  39     $glyphIDs = array();
  40     foreach ($this->components as $_component) {
  41       $glyphIDs[] = $_component->glyphIndex;
  42
  43       $_glyph   = $this->table->data[$_component->glyphIndex];
  44
  45       if ($_glyph !== $this) {
  46         $glyphIDs = array_merge($glyphIDs, $_glyph->getGlyphIDs());
  47       }
  48     }
  49
  50     return $glyphIDs;
  51   }
  52
  53   /*function parse() {
  54     //$this->parseData();
  55   }*/
  56
  57   function parseData() {
  58     parent::parseData();
  59
  60     $font = $this->getFont();
  61
  62     do {
  63       $flags      = $font->readUInt16();
  64       $glyphIndex = $font->readUInt16();
  65
  66       $a = 1.0;
  67       $b = 0.0;
  68       $c = 0.0;
  69       $d = 1.0;
  70       $e = 0.0;
  71       $f = 0.0;
  72
  73       $point_compound  = null;
  74       $point_component = null;
  75
  76       $instructions = null;
  77
  78       if ($flags & self::ARG_1_AND_2_ARE_WORDS) {
  79         if ($flags & self::ARGS_ARE_XY_VALUES) {
  80           $e = $font->readInt16();
  81           $f = $font->readInt16();
  82         }
  83         else {
  84           $point_compound  = $font->readUInt16();
  85           $point_component = $font->readUInt16();
  86         }
  87       }
  88       else {
  89         if ($flags & self::ARGS_ARE_XY_VALUES) {
  90           $e = $font->readInt8();
  91           $f = $font->readInt8();
  92         }
  93         else {
  94           $point_compound  = $font->readUInt8();
  95           $point_component = $font->readUInt8();
  96         }
  97       }
  98
  99       if ($flags & self::WE_HAVE_A_SCALE) {
 100         $a = $d = $font->readInt16();
 101       }
 102       elseif ($flags & self::WE_HAVE_AN_X_AND_Y_SCALE) {
 103         $a = $font->readInt16();
 104         $d = $font->readInt16();
 105       }
 106       elseif ($flags & self::WE_HAVE_A_TWO_BY_TWO) {
 107         $a = $font->readInt16();
 108         $b = $font->readInt16();
 109         $c = $font->readInt16();
 110         $d = $font->readInt16();
 111       }
 112
 113       //if ($flags & self::WE_HAVE_INSTRUCTIONS) {
 114       //
 115       //}
 116
 117       $component                  = new OutlineComponent();
 118       $component->flags           = $flags;
 119       $component->glyphIndex      = $glyphIndex;
 120       $component->a               = $a;
 121       $component->b               = $b;
 122       $component->c               = $c;
 123       $component->d               = $d;
 124       $component->e               = $e;
 125       $component->f               = $f;
 126       $component->point_compound  = $point_compound;
 127       $component->point_component = $point_component;
 128       $component->instructions    = $instructions;
 129
 130       $this->components[] = $component;
 131     } while ($flags & self::MORE_COMPONENTS);
 132   }
 133
 134   function encode() {
 135     $font = $this->getFont();
 136
 137     $gids = $font->getSubset();
 138
 139     $size = $font->writeInt16(-1);
 140     $size += $font->writeFWord($this->xMin);
 141     $size += $font->writeFWord($this->yMin);
 142     $size += $font->writeFWord($this->xMax);
 143     $size += $font->writeFWord($this->yMax);
 144
 145     foreach ($this->components as $_i => $_component) {
 146       $flags = 0;
 147       if ($_component->point_component === null && $_component->point_compound === null) {
 148         $flags |= self::ARGS_ARE_XY_VALUES;
 149
 150         if (abs($_component->e) > 0x7F || abs($_component->f) > 0x7F) {
 151           $flags |= self::ARG_1_AND_2_ARE_WORDS;
 152         }
 153       }
 154       elseif ($_component->point_component > 0xFF || $_component->point_compound > 0xFF) {
 155         $flags |= self::ARG_1_AND_2_ARE_WORDS;
 156       }
 157
 158       if ($_component->b == 0 && $_component->c == 0) {
 159         if ($_component->a == $_component->d) {
 160           if ($_component->a != 1.0) {
 161             $flags |= self::WE_HAVE_A_SCALE;
 162           }
 163         }
 164         else {
 165           $flags |= self::WE_HAVE_AN_X_AND_Y_SCALE;
 166         }
 167       }
 168       else {
 169         $flags |= self::WE_HAVE_A_TWO_BY_TWO;
 170       }
 171
 172       if ($_i < count($this->components) - 1) {
 173         $flags |= self::MORE_COMPONENTS;
 174       }
 175
 176       $size += $font->writeUInt16($flags);
 177
 178       $new_gid = array_search($_component->glyphIndex, $gids);
 179       $size += $font->writeUInt16($new_gid);
 180
 181       if ($flags & self::ARG_1_AND_2_ARE_WORDS) {
 182         if ($flags & self::ARGS_ARE_XY_VALUES) {
 183           $size += $font->writeInt16($_component->e);
 184           $size += $font->writeInt16($_component->f);
 185         }
 186         else {
 187           $size += $font->writeUInt16($_component->point_compound);
 188           $size += $font->writeUInt16($_component->point_component);
 189         }
 190       }
 191       else {
 192         if ($flags & self::ARGS_ARE_XY_VALUES) {
 193           $size += $font->writeInt8($_component->e);
 194           $size += $font->writeInt8($_component->f);
 195         }
 196         else {
 197           $size += $font->writeUInt8($_component->point_compound);
 198           $size += $font->writeUInt8($_component->point_component);
 199         }
 200       }
 201
 202       if ($flags & self::WE_HAVE_A_SCALE) {
 203         $size += $font->writeInt16($_component->a);
 204       }
 205       elseif ($flags & self::WE_HAVE_AN_X_AND_Y_SCALE) {
 206         $size += $font->writeInt16($_component->a);
 207         $size += $font->writeInt16($_component->d);
 208       }
 209       elseif ($flags & self::WE_HAVE_A_TWO_BY_TWO) {
 210         $size += $font->writeInt16($_component->a);
 211         $size += $font->writeInt16($_component->b);
 212         $size += $font->writeInt16($_component->c);
 213         $size += $font->writeInt16($_component->d);
 214       }
 215     }
 216
 217     return $size;
 218   }
 219
 220   public function getSVGContours() {
 221     $contours = array();
 222
 223     /** @var \FontLib\Table\Type\glyf $glyph_data */
 224     $glyph_data = $this->getFont()->getTableObject("glyf");
 225
 226     /** @var Outline[] $glyphs */
 227     $glyphs = $glyph_data->data;
 228
 229     foreach ($this->components as $component) {
 230       $_glyph = $glyphs[$component->glyphIndex];
 231
 232       if ($_glyph !== $this) {
 233         $contours[] = array(
 234           "contours"  => $_glyph->getSVGContours(),
 235           "transform" => $component->getMatrix(),
 236         );
 237       }
 238     }
 239
 240     return $contours;
 241   }
 242 }