justify text using imagettftext?

[_SAi_]

Hi,

Is there a way to specify the justification of text using the imagettftext function?  IF so, how would I go about aligning my multi line text left,  right or center?

Thanks!

[simcoweb]

I'm not sure what you're trying to accomplish but the simplest way might be to use CSS then just place the class name into your output in the script.

[michaellunsford]

You will have to justify one line at a time.

left: easy, set your x coordinate to 1, or 5 or something small.

right: more fun... using imagettfbbox(), calculate the total width of the text, then subtract it from the imagesx() of the image.

center: the most fun... same as "right" but divide the end result by 2.

The example below isn't fully tested, but it should fly.
[code]
<?php
$im= imagecreatetruecolor(500,500);
$coordinates=imagettfbbox(12, 0, 'arial.ttf', 'this is my display text');
$width=$coordinates[0]-$coordinates[2];
if($width<0) $width=width*(-1);

$left=10; //pick a number
$right=imagesx($im)-$width;
$center=$right/2;
?>
[/code]

[_SAi_]

Thanks,

I am still very new to php.  Is there a way to integrate that into what I currently have?

[code]
class textPNG {

var $font = 'ttf/Script/Amazone.ttf'; //default font. directory relative to script directory.
var $msg = "this is a sample of using dynamic fonts with PHP"; // default text to display.
var $size = 25;
var $rot = 0; // rotation in degrees.
var $pad = 15; // padding.
var $transparent = 0; // transparency set to on.
var $red = 0; // black text...
var $grn = 0;
var $blu = 0;
var $bg_red = 255; // on white background.
var $bg_grn = 255;
var $bg_blu = 255;
var $hex = 'FFFFFF';

function draw() {
$width = 0;
$height = 0;
$offset_x = 0;
$offset_y = 0;
$bounds = array();
$image = "";

// determine font height.
$bounds = ImageTTFBBox($this->size, $this->rot, $this->font, "W");
if ($this->rot < 0) {
$font_height = abs($bounds[7]-$bounds[1]);
} else if ($this->rot > 0) {
$font_height = abs($bounds[1]-$bounds[7]);
} else {
$font_height = abs($bounds[7]-$bounds[1]);
}

// determine bounding box.
$bounds = ImageTTFBBox($this->size, $this->rot, $this->font, $this->msg);
if ($this->rot < 0) {
$width = abs($bounds[4]-$bounds[0]);
$height = abs($bounds[3]-$bounds[7]);
$offset_y = $font_height;
$offset_x = 0;

} else if ($this->rot > 0) {
$width = abs($bounds[2]-$bounds[6]);
$height = abs($bounds[1]-$bounds[5]);
$offset_y = abs($bounds[7]-$bounds[5])+$font_height;
$offset_x = abs($bounds[0]-$bounds[6]);

} else {
$width = abs($bounds[4]-$bounds[6]);
$height = abs($bounds[7]-$bounds[1]);
$offset_y = $font_height;;
$offset_x = 0;
}

$image = imagecreate($width+($this->pad*2)+1,$height+($this->pad*2)+1);

$background = ImageColorAllocate($image, $this->bg_red, $this->bg_grn, $this->bg_blu);
$foreground = ImageColorAllocate($image, $this->red, $this->grn, $this->blu);

if ($this->transparent) ImageColorTransparent($image, $background);
ImageInterlace($image, false);

// render it.
ImageTTFText($image, $this->size, $this->rot, $offset_x+$this->pad, $offset_y+$this->pad, $foreground, $this->font, $this->msg);

// output PNG object.
imagePNG($image);

} //function draw
} //class

[/code]

Many Thanks!

[_SAi_]

Ok, this is what I have tried, but it doesn't appear to be working.
Any Ideas??

[code]
class textPNG {

var $font = 'ttf/Script/Amazone.ttf'; //default font. directory relative to script directory.
var $msg = "this is a sample of using dynamic fonts with PHP"; // default text to display.
var $size = 25;
var $rot = 0; // rotation in degrees.
var $pad = 15; // padding.
var $transparent = 0; // transparency set to on.
var $red = 0; // black text...
var $grn = 0;
var $blu = 0;
var $bg_red = 255; // on white background.
var $bg_grn = 255;
var $bg_blu = 255;
var $hex = 'FFFFFF';
var $alignment = 'Left';

function draw() {
$width = 0;
$height = 0;
$offset_x = 0;
$offset_y = 0;
$bounds = array();
$image = "";

// determine font height.
$bounds = ImageTTFBBox($this->size, $this->rot, $this->font, "W");
if ($this->rot < 0)
{
$font_height = abs($bounds[7]-$bounds[1]);
}

else if ($this->rot > 0)
{
$font_height = abs($bounds[1]-$bounds[7]);
}

else
{
$font_height = abs($bounds[7]-$bounds[1]);
}

// determine bounding box.
$bounds = ImageTTFBBox($this->size, $this->rot, $this->font, $this->msg);
if ($this->rot < 0)
{
$width = abs($bounds[4]-$bounds[0]);
$height = abs($bounds[3]-$bounds[7]);
$offset_y = $font_height;
$offset_x = 0;
}

else if ($this->rot > 0)
{
$width = abs($bounds[2]-$bounds[6]);
$height = abs($bounds[1]-$bounds[5]);
$offset_y = abs($bounds[7]-$bounds[5])+$font_height;
$offset_x = abs($bounds[0]-$bounds[6]);
}

else
{
$width = abs($bounds[4]-$bounds[6]);
$height = abs($bounds[7]-$bounds[1]);
$offset_y = $font_height;;
// $offset_x = 0;

if ($this->alignment == "Right")
$offset_x -= $width;

else if ($this->alignment == "Centre")
$offset_x -= $width / 2;

else $offset_x = 0;
} //else

$image = imagecreate($width+($this->pad*2)+1,$height+($this->pad*2)+1);

$background = ImageColorAllocate($image, $this->bg_red, $this->bg_grn, $this->bg_blu);
$foreground = ImageColorAllocate($image, $this->red, $this->grn, $this->blu);

if ($this->transparent) ImageColorTransparent($image, $background);
ImageInterlace($image, false);



// render it.
ImageTTFText($image, $this->size, $this->rot, $offset_x+$this->pad, $offset_y+$this->pad, $foreground, $this->font, $this->msg);

// output PNG object.
imagePNG($image);

} //function draw
} //class

[/code]


Thanks!