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Bug #13743 TTF Fonts
Submitted: 2001-10-19 07:10 UTC Modified: 2001-10-21 14:05 UTC
From: go at maktoob dot com Assigned:
Status: Closed Package: GD related
PHP Version: 4.0.6 OS: Windows 2000 Advanced Server
Private report: No CVE-ID: None
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From: go at maktoob dot com
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 [2001-10-19 07:10 UTC] go at maktoob dot com
When I used the Image Creation function in the GD Library that have any relation to the TTF fonts the server generate this Error related to PHP.exe

'The instruction at "0x1009fff3" referenced memory at "0x00a50d00". The memory could not be "read".'


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 [2001-10-19 07:15 UTC]
Submitted twice, #13743 has slightly more info.


- Markus
 [2001-10-19 07:25 UTC]
Let's keep this one open...
 [2001-10-20 13:04 UTC]
Can you provide a sample script?

It might be a problem with GD 2.0, which is still beta. You can try downloading PHP-4.0.5 from and use php_gd.dll from that distribution (it should work fine with 4.0.6).
 [2001-10-21 01:35 UTC] go at maktoob dot com
the script that I used is almost the same that comes with the PHP documentation ...
the error come when I use the ImageTTFText() function in intensive matter, in other words I called this function about 5-10 times in almost one secound
example of calling 
<img scr="writeText.php?Text=Anything;Fnt=Verdana.ttf;Dest=c:\a1.jpg">

<img scr="writeText.php?Text=Anything2;Fnt=Verdana.ttf;Dest=c:\a2.jpg">

and I wrote this code serveral time in the same page ...
is that should cause the problem ?
 [2001-10-21 09:15 UTC]
I've heard something about GD being not thread safe (at least, not on Windows). Can someone confirm this? If it's not thread safe, that might be the cause of this crash...

Once again, try the php_gd.dll from PHP-4.0.5, which contains a stable version of GD.
 [2001-10-21 09:31 UTC]
GD is not thread safe... so it may crash if PHP is used as ISAPI module.

 [2001-10-21 13:32 UTC]
Then let's close this bug...
It's in the 4.1 todo anyway:
* Make all extensions thread-safe.
 [2001-10-21 14:05 UTC]

It is not the extension that is not thread-safe, but the GD library itself. This could have been fixed with version 2 though.

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