Jpgraph image brokeing

[Dileep c]

There is either a configuration problem with TrueType or a problem reading font file "/var/www/xxxxx/public_html/vendor/amenadiel/jpgraph/src/fonts/DejaVuSans-Bold.ttf" Make sure file exists and is in a readable place for the HTTP process. (If 'basedir' restriction is enabled in PHP then the font file must be located in the document root.). It might also be a wrongly installed FreeType library. Try upgrading to at least FreeType 2.1.13 and recompile GD with the correct setup so it can find the new FT library.

[John Crisp]

I have had the same issue since updating recently from 3.x to 4.3.1 and have been trying to debug it. 

Graphs I have used for years seemed to have broken overnight.

It ISN'T because the font file is missing. That error is totally misleading. My font files are in a subdirectory of the jpgraph directory. I can see the code checks for the existence of the font file and that is all OK.

If there was an open basedir error my server would tell me. So it isn't that.

For some reason it seems to fall over trying to stroke a non existent text value.

I have seen it happen over and over but can't get my head round why.

Running a test with example0.php

Here's where it fails when I step debug it

        // The built in imagettfbbox is buggy for angles != 0 so

        // we calculate this manually by getting the bounding box at

        // angle = 0 and then rotate the bounding box manually

        $bbox = @imagettfbbox($size, 0, $fontfile, $text);

        if( $bbox === false ) {

            JpGraphError::RaiseL(25092,$this->font_file);

You can see in the screen shot that the value of $text is not set.

Any help gratefully received - I have wasted hours trying to figure this out and still don't understand.

checkttf.php - works

checkgd.php - works

checkgd2.php - works

testsuit.php

Works:

antispamex01.php 

ledex*

ledex_cyrillic.php

ledex_cyrillic2.php

I also added a non Cyrillic text version and that works too.

phpinfo

PHP 7.2.29

GD Support enabled

GD headers Version 2.2.5

GD library Version 2.3.0

FreeType Support enabled

FreeType Linkage with freetype

FreeType Version 2.3.11

GIF Read Support enabled

GIF Create Support enabled

JPEG Support enabled

libJPEG Version 6b

PNG Support enabled

libPNG Version 1.2.49

WBMP Support enabled

XPM Support enabled

libXpm Version 30411

XBM Support enabled

WebP Support enabled

Directive Local Value Master Value

gd.jpeg_ignore_warning 1

[Gavin D]

gdImageStringFT() fails for empty strings as of libgd 2.3.0.

https://github.com/libgd/libgd/issues/615

https://bugs.php.net/bug.php?id=79415

All you need to do is add blank string checks around ImageTTFText like as I've done in my fork of the codebase.

https://github.com/rulin132/JpGraph/pull/3/commits/2e5a177a260be0876f47a0a16297cdfbff9cca19

Surely this will be patched really soon.

[John Crisp]

Blimey - that fixed thanks.

This has been driving me insane.

There should be better error checking anyway - see my main post where I identified an issue with the php error handling.

The error handling should have identified the empty string - that would at least have helped.

Also, it doesn't explain why it is trying to stroke a non existent value ? Surely that should be picked up, but i can't see where?

[John Crisp]

Ahhh - got it.

I have empty/unset SubTitle and SubSubTitle and TabTitle

So these probably all need a 

if ne "" 

        // ... and subtitle

        $y += $this->title->GetTextHeight($this->img) + $margin + $this->subtitle->margin;

        if( $this->subtitle->halign == 'center' ) {

            $this->subtitle->Center(0,$this->img->width,$y);

        }

        elseif( $this->subtitle->halign == 'left' ) {

            $this->subtitle->SetPos($this->subtitle->margin+2,$y);

        }

        elseif( $this->subtitle->halign == 'right' ) {

            $indent = 0;

            if( $this->doshadow )

            $indent = $this->shadow_width+2;

            $this->subtitle->SetPos($this->img->width-$this->subtitle->margin-$indent,$y,'right');

        }

        $this->subtitle->Stroke($this->img);

        // ... and subsubtitle

        $y += $this->subtitle->GetTextHeight($this->img) + $margin + $this->subsubtitle->margin;

        if( $this->subsubtitle->halign == 'center' ) {

            $this->subsubtitle->Center(0,$this->img->width,$y);

        }

        elseif( $this->subsubtitle->halign == 'left' ) {

            $this->subsubtitle->SetPos($this->subsubtitle->margin+2,$y);

        }

        elseif( $this->subsubtitle->halign == 'right' ) {

            $indent = 0;

            if( $this->doshadow )

            $indent = $this->shadow_width+2;

            $this->subsubtitle->SetPos($this->img->width-$this->subsubtitle->margin-$indent,$y,'right');

        }

        $this->subsubtitle->Stroke($this->img);

        // ... and fancy title

        $this->tabtitle->Stroke($this->img);

[Ralph Höglund]

Thank you for the fix, saved many hours for me!

[Ralph Höglund]

Tis it is:

https://github.com/rulin132/JpGraph/pull/3/commits/2e5a177a260be0876f47a0a16297cdfbff9cca19

[MBL]

This patch worked for me as well. Many Thanks for sharing..

[Alejandro Márquez]

Works for me too, the error ocurred when migrate to Centos 7 with PHP 7.4.6, thanks