pomax / php-font-parser Goto Github PK

Can you add a list of supported characters to be called from the font object.

I am trying to get glyph paths of multi letters in one Ajax call.
Simply here is what I want:
[input] $text: "a sentence", $font: 'arial'
[output] array of glyphs

Here is my code:

// * VectorFont.php * //

    require_once("fontparse.php");
    class VectorFont {

    protected $font;

    public function loadFont($font)
    {
        $this->font = new \OTTTFont($font);
    }
    public function getGlyph($letter)
    {
        $data = null;
        if($this->font) {
            $data = $this->font->get_glyph($letter);
        }
        return $data;
    }
    }

// * test.php * //

    getGlyphs('multiple letters', 'arial'); // memory exceed error

    // receive multi-letter text as an input and return array of glyphs
    public function getGlyphs($text, $font)
    {
        $glyphs = array();
        $this->vectorFont = new VectorFont();
        $this->vectorFont->loadFont($font.'.ttf');
        for($i=0 ; $i<mb_strlen($text) ; $i++) {

            // avoid error that occurs if call "get_glyph" with same letter more than once
            $dupIndex = $this->findFirstDuplication(mb_substr($text, $i, 1), $text);

            if($dupIndex >= 0 && $dupIndex < $i) {
                // if duplicated letter existed previously, copy previous data 
                array_push($glyphs, $glyphs[$dupIndex]);

            } else {
                $glyph = $this->vectorFont->getGlyph(mb_substr($text, $i, 1));

                if($glyph) {
                    array_push($glyphs, $glyph);
                } else {
                    array_push($glyphs, "");
                }
            }
        }
        return $glyphs;
    }

First of all, an error occurs if call "get_glyph" with same letter more than once. But I can write work around to avoid this problem, so this is not a big problem

But, I can hardly fix the memory issue. I don't understand why memory usage exceeds the limit even though font object is loaded just once at first. Do you have an idea to fix this problem?

parsing of type2 charstring 4-byte numbers ([255] + 32-bits) is incorrect. It should read in the full 32bit number, treated as a 2's complement pattern, and then record it as FIXED (signed short + unsigned short fraction).

Is there a reason for the font directory? Coulnd't be useful to load and parse the installed fonts?

the glyph fetcher currently caches on character, rather than on character per font, so using multiple fonts on the same run for the same character causes faulty runs.

When processing multiple glyphs, the processing speed is so slow and ,in my case, server's memory exceeds limit so cannot get desired result properly or quickly.
I hope this is a solution for this problem.

foreach ($text as $letter) {
    while($glyph) {
        if($glyph->letter == $letter) {
            echo $glyph->d;
        }
        $glyph = nextGlygh();
    }
}

Above algorithm makes server soooo busy because searching element in stdClass and looping over time allocates too much memory in the system. I don't know why the php creators wrote like this, but this is the nature of php just like you said.

$count = strlen($text);
$glyph = firstGlyph();
while($glyph && $count>0) {
    foreach ($text as $letter) {
        if($glyph->letter == $letter) {
            $cache[$letter] = $glyph->d;
            $count--;
        }
    }
    $glyph = nextGlygh();
}

foreach ($text as $letter) {
    echo $cache[$letter];
}

This algorithm is way faster and does not allocate wasteful memory. Hope this helps to enhance your library.

运行之后一直报异常

hi

Re your sample code which looks for letter "g" ... what if I needed to check for a glyph much higher up, eg U+232B for example?

Thanks, Ian

I downloaded and tried to test a font but encountered errors in the font test. The first was an easy fix. There is a missing parenthesis on line 34. But it was followed up by this:
font header data:
header:
{version: OTTO, number of tables: 14, search range: 128, entry selector: 3, range shift: 96}
tables:
{tag: BASE, checkSum: 1063407546, offset: 4284, length: 52}
{tag: CFF , checkSum: 838456334, offset: 4336, length: 15280}
{tag: DSIG, checkSum: 2007147259, offset: 22056, length: 5744}
{tag: GPOS, checkSum: 28576472, offset: 19616, length: 1554}
{tag: GSUB, checkSum: 1843949587, offset: 21172, length: 812}
{tag: LINO, checkSum: -253362844, offset: 21984, length: 72}
{tag: OS/2, checkSum: 2041581385, offset: 336, length: 96}
{tag: cmap, checkSum: 2129153568, offset: 2308, length: 932}
{tag: head, checkSum: -603480306, offset: 236, length: 54}
{tag: hhea, checkSum: 117441355, offset: 292, length: 36}
{tag: hmtx, checkSum: 105393449, offset: 3240, length: 1012}
{tag: maxp, checkSum: 16601088, offset: 328, length: 6}
{tag: name, checkSum: 1654205279, offset: 432, length: 1874}
{tag: post, checkSum: -4718542, offset: 4252, length: 32}


Fatal error: Call to a member function computeBounds() on a non-object in D:\websites\vitt.easypic.se\fonttest\Font parser\OTF data\Glyph classes\glyph.php on line 31

This is on Windows IIS 7.5 using PHP 5.3+

Hi,

When I am running "fonttest.php", I am getting an error:
Fatal error: Class 'Monolog\Formatter\LineFormatter' not found in /www/image_module_testbed_new/fontparser/Font parser/OTF data/Glyph classes/glyphrules.php on line 44

Font header is nicely printed out. But "$data = $font->get_glyph($letter);" makes such error.
And I can hardly fix it by myself.. Please help

The following code fails after the first letter is retrieved:

$text = "After all this time...";
$letters = str_split($text);
print_r($letters);

foreach($letters as $letter) {
    $json = false;
    while($json === false && count($fonts)>0) {
        $font = new OTTTFont(array_pop($fonts));
        echo "font header data:\n" . $font->toString() . "\n";
        $data = $font->get_glyph($letter);
        if($data!==false) {
            $json = $data->toJSON();
        }
    }
}

The first letter is found, then the parser reports the font does not support "f". Splitting the string "fter all this time..." then finds the "f" but reports the font does not support "t", etc.