imageloadfont

(PHP 4, PHP 5)

imageloadfontCarrega uma nova fonte

Descrição

int imageloadfont ( string $file )

imageloadfont() carrega uma fonte bitmap do usuário e retorna um identificador.

Parâmetros

file

O formato do arquivo de fonte é atualmente binário e dependente da arquitetura. Isto indica que você deverá gerar os arquivos de fonte no mesmo tipo de CPU no qual esta executando o PHP.

Formato do arquivo de fonte
Posição do byte Tipo de dados C Descrição
byte 0-3 int Número de caracteres na fonte
byte 4-7 int Valor do primeiro caractere na fonte (normalmente 32 para o espaço)
byte 8-11 int A largura em pixel de cada caractere
byte 12-15 int A altura em pixel de cada caractere
byte 16- char Matriz com os dados dos caracteres, um byte por pixel em cada caractere para um total de (caracteres*largura*altura).

Valor Retornado

The font identifier which is always bigger than 5 to avoid conflicts with built-in fonts or FALSE on errors.

Exemplos

Exemplo #1 Usando imageloadfont

<?php
header
("Content-type: image/png");
$im imagecreatetruecolor(5020);
$black imagecolorallocate($im000);
$white imagecolorallocate($im255255255);
imagefilledrectangle($im004919$white);
$font imageloadfont("04b.gdf");
imagestring($im$font00"Hello"$black);
imagepng($im);
?>

Veja Também

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User Contributed Notes 7 notes

up
1
alex at bestgames dot ro
9 years ago
Confirmation code generation for preventing automated registrations on a website.

Function arguments are:
$code - the code that you shall random generate
$location - relative location of the image that shall be generated
$fonts_dir - relative location for the GDF fonts directory

This function will create an image with the code given by you and will save it in the directory specified with the name formed by MD5 hash of the code.

You may insert as many font types in the fonts directory as you wish, with random names.

<?php
function generate_image($code, $location, $fonts_dir)
{
    
$image  = imagecreate(150, 60);          
    
imagecolorallocate($image, rand(0, 100), rand(100, 150), rand(150, 250));
    
$fonts = scandir($fonts_dir);
    
    
$max = count($fonts) - 2;
    
    
$width = 10;
     for (
$i = 0; $i <= strlen($code); $i++)
     {    
        
$textcolor = imagecolorallocate($image, 255, 255, 255);
        
$rand = rand(2, $max);
        
$font = imageloadfont($fonts_dir."/".$fonts[$rand]);
        
        
$fh = imagefontheight($font);
        
$fw = imagefontwidth($font);

        
imagechar($image, $font, $width, rand(10, 50 - $fh), $code[$i], $textcolor);    
         
$width = $width + $fw;
       
     }
            
    
imagejpeg($image, $location."/".md5($code).".jpg", 100);
    
imagedestroy($image);      
   
     return
$code;
    
}

?>
up
1
siker at norwinter dot com
9 years ago
Working under the assumption that the only 'architecture dependant' part of the font files is endianness, I wrote a quick and dirty Python script to convert between the two. It has only been tested on a single font on a single machine so don't bet your life on it working. All it does is swap the byte order of the first four ints.

#!/usr/bin/env python

f = open("myfont.gdf", "rb");
d = open("myconvertedfont.gdf", "wb");

for i in xrange(4):
        b = [f.read(1) for j in xrange(4)];
        b.reverse();
        d.write(''.join(b));

d.write(f.read());

I successfully used this script to convert anonymous.gdf, from one of the font links below, into something useable on Mac OS X.
up
1
matthew at exanimo dot com
9 years ago
Remember - GD fonts aren't antialiased.  If you're planning on using a pre-existing (TrueType) font, you may want to consider using imagettftext() instead of phillip's function.
up
1
puremango dot co dot uk at gmail dot com
9 years ago
I've written an online tool in PHP that allows you to create GD fonts from PNG images.

much usefulness for custom font creation, I feel.

see the tool@
http://puremango.co.uk/cm_fontmaker_114.php
(source available online)
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-1
null at phpmix dot com
9 years ago
Sometime ago I wrote a small tutorial on how to create dynamic signatures using gd_fonts. I also uploaded some gd_fonts...

You can check it out here, if you wish:
http://www.phpmix.com/phpBB2/viewtopic.php?t=328

Hope that helps
up
-1
widget at oneblacksheep dot com
10 years ago
After noting the gd fonts page from dryes58 above was down I contacted the him and have put the pages up at http://www.widgnet.com/gdf_fonts/ hows about that then =)
up
-1
angryziber at mail dot com
14 years ago
You all should look at the GD image library site for information on extra fonts, it can be found at http://www.boutell.com/gd/
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