imageloadfont

imageloadfont

(PHP 3, PHP 4, PHP 5)

imageloadfont -- Load a new font

Description

int imageloadfont ( string file )

imageloadfont() loads a user-defined bitmap font and returns an identifier for the font (that is always greater than 5, so it will not conflict with the built-in fonts). It returns FALSE in case of error.

The font file format is currently binary and architecture dependent. This means you should generate the font files on the same type of CPU as the machine you are running PHP on.

Table 1. Font file format

byte positionC data typedescription
byte 0-3intnumber of characters in the font
byte 4-7int value of first character in the font (often 32 for space)
byte 8-11intpixel width of each character
byte 12-15intpixel height of each character
byte 16-char array with character data, one byte per pixel in each character, for a total of (nchars*width*height) bytes.

Example 1. Using imageloadfont

<?php
header
("Content-type: image/png");
$im = imagecreatetruecolor(50, 20);
$black = imagecolorallocate($im, 0, 0, 0);
$white = imagecolorallocate($im, 255, 255, 255);
imagefilledrectangle($im, 0, 0, 49, 19, $white);
$font = imageloadfont("04b.gdf");
imagestring($im, $font, 0, 0, "Hello", $black);
imagepng($im);
?>

See also imagefontwidth() and imagefontheight().

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