Debian Bug report logs - #561571
Wrong X-coordinate calculation in imagettfbbox function of php5

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Message #5 received at submit@bugs.debian.org (full text, mbox, reply):

From: Максим Качалин <m@lifelink.ru>

To: submit@bugs.debian.org

Subject: Wrong X-coordinate calculation in imagettfbbox function of php5

Date: Fri, 18 Dec 2009 13:25:09 +0300

Package: libapache2-mod-php5
Version: 5.2.11.dfsg.1-2

Package: libgd2-xpm
Version: 2.0.36~rc1~dfsg-3.1

When site being opened first time function imagettfbbox calculates wrong 
X-coordinate.
As a result we seen only "And Zend Engine ..." string. If I refresh 
site, coordintes calculates correct and I'll see both sign "Powere by 
PHP" and "And Zend Optimizer

There is test script:

<?php^M
// Create a 300x150 image^M
$im = imagecreatetruecolor(300, 150);^M
$black = imagecolorallocate($im, 0, 0, 0);^M
$white = imagecolorallocate($im, 255, 255, 255);^M

// Set the background to be white^M
imagefilledrectangle($im, 0, 0, 299, 299, $white);^M

// Path to our font file^M
$font = $_SERVER["DOCUMENT_ROOT"].'/bitrix/modules/main/fonts/font.ttf';^M

// First we create our bounding box for the first text^M
$bbox = imagettfbbox(10, 45, $font, 'Powered by PHP ' . phpversion());^M

// This is our cordinates for X and Y^M
$x = $bbox[0] + (imagesx($im) / 2) - ($bbox[4] / 2) - 25;^M
$y = $bbox[1] + (imagesy($im) / 2) - ($bbox[5] / 2) - 5;^M
var_dump($x);
var_dump($y);
die;

// Write it
imagettftext($im, 10, 45, $x, $y, $black, $font, 'Powered by PHP ' . 
phpversion());^M

// Create the next bounding box for the second text^M
$bbox = imagettfbbox(10, 45, $font, 'and Zend Engine ' . zend_version());^M

// Set the cordinates so its next to the first text^M
$x = $bbox[0] + (imagesx($im) / 2) - ($bbox[4] / 2) + 10;^M
$y = $bbox[1] + (imagesy($im) / 2) - ($bbox[5] / 2) - 5;^M

// Write it^M
imagettftext($im, 10, 45, $x, $y, $black, $font, 'and Zend Engine ' . 
zend_version());^M

// Output to browser^M
header('Content-type: image/png');^M

imagepng($im);^M
imagedestroy($im);^M
?>

This is a result of var_dump, when firstly opened:
int(1073741950) int(139)
and after site refresh:
float(69.5) int(139)

I'm using Debian 'squeeze':
Linux 2.6.31-1-686 #1 SMP Sun Nov 15 20:39:33 UTC 2009 i686 GNU/Linux

Message #10 received at 561571@bugs.debian.org (full text, mbox, reply):

From: Ondřej Surý <ondrej@sury.org>

To: 561571-submitter@bugs.debian.org, 561571@bugs.debian.org

Subject: #561571: Wrong X-coordinate calculation in imagettfbbox function of php5

Date: Fri, 8 Jan 2010 18:02:22 +0100

tag 561571 +moreinfo
thank you

Could you provide font from your test script or confirm I can use any
TTF font from system?

-- 
Ondřej Surý <ondrej@sury.org>
http://blog.rfc1925.org/

Message #20 received at 561571-quiet@bugs.debian.org (full text, mbox, reply):

From: Максим Качалин <m@lifelink.ru>

To: Ondřej Surý <ondrej@sury.org>, 561571-quiet@bugs.debian.org

Subject: Re: Bug#561571: #561571: Wrong X-coordinate calculation in imagettfbbox function of php5

Date: Sun, 10 Jan 2010 17:57:15 +0300

[Message part 1 (text/plain, inline)]

Hello.

Font is attached to the letter.
I tried this script on another server with this font, but with another 
versions of PHP and GD — all ok.

Maksim Kachalin.


> tag 561571 +moreinfo
> thank you
>
> Could you provide font from your test script or confirm I can use any
> TTF font from system?
>
>   

[font.ttf (application/octet-stream, attachment)]

Message #25 received at 561571-quiet@bugs.debian.org (full text, mbox, reply):

From: Ondřej Surý <ondrej@sury.org>

To: Максим Качалин <m@lifelink.ru>

Cc: 561571-quiet@bugs.debian.org

Subject: Re: Bug#561571: #561571: Wrong X-coordinate calculation in imagettfbbox function of php5

Date: Mon, 11 Jan 2010 16:44:44 +0100

2010/1/10 Максим Качалин <m@lifelink.ru>:
> Hello.
>
> Font is attached to the letter.

Thanks, I will retest your example script in my environment.

> I tried this script on another server with this font, but with another
> versions of PHP and GD — all ok.

What are versions of PHP5 and GD on that another server? Do you use
testing or unstable?

Ondrej
-- 
Ondřej Surý <ondrej@sury.org>
http://blog.rfc1925.org/

Message #30 received at 561571-done@bugs.debian.org (full text, mbox, reply):

From: Ondřej Surý <ondrej@sury.org>

To: Максим Качалин <m@lifelink.ru>, 561571-done@bugs.debian.org

Subject: Re: Bug#561571: #561571: Wrong X-coordinate calculation in imagettfbbox function of php5

Date: Mon, 11 Jan 2010 17:14:48 +0100

Version: 5.2.12.dfsg.1-1

So to summarize:

lenny version (5.2.6-1+lenny4) works ok.
testing and unstable versions (5.2.11+) are broken.

I have retested with php 5.2.12.dfsg.1-1 (unstable) and 5.3.1-1
(experimental) and both return consistent results.

5.3.1-1:

root@howl:/tmp# php test.php
int(73)
float(135.5)
root@howl:/tmp# php test.php
int(73)
float(135.5)


5.2.12.dfsg.1-1:

root@howl:/tmp# php test.php
float(69.5)
int(139)
root@howl:/tmp# php test.php
float(69.5)
int(139)

I'm closing the bug as fixed in 5.2.12.dfsg.1-1, feel free to reopen
the bug if your testing (with 5.2.12.dfsg.1-1) differ.

Ondrej

2010/1/11 Максим Качалин <m@lifelink.ru>:
> PHP Version 5.2.6-1+lenny4
>
> Package: php5-gd
> Priority: optional
> Section: web
> Installed-Size: 160
> Maintainer: Debian PHP Maintainers <pkg-php-maint@lists.alioth.debian.org>
> Architecture: i386
> Source: php5
> Version: 5.2.6.dfsg.1-1+lenny3
>
>
>> 2010/1/10 Максим Качалин <m@lifelink.ru>:
>>
>>>
>>> Hello.
>>>
>>> Font is attached to the letter.
>>>
>>
>> Thanks, I will retest your example script in my environment.
>>
>>
>>>
>>> I tried this script on another server with this font, but with another
>>> versions of PHP and GD — all ok.
>>>
>>
>> What are versions of PHP5 and GD on that another server? Do you use
>> testing or unstable?
>>
>> Ondrej
>>
>
>



-- 
Ondřej Surý <ondrej@sury.org>
http://blog.rfc1925.org/

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