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Doc Bug #11917 imageDashedLine() only seems to draw vertical lines
Submitted: 2001-07-05 20:05 UTC Modified: 2001-07-06 07:50 UTC
From: kyhm at kyhm dot com Assigned:
Status: Closed Package: Documentation problem
PHP Version: 4.0.6 OS: Linux 2.2 SMP
Private report: No CVE-ID: None
View Developer Edit
 [2001-07-05 20:05 UTC] kyhm at kyhm dot com 
Using PHP 4.0.6, GD 2.0.1, Apache 1.3.19, and a TrueColor image, this code:

  $img = imageCreateTrueColor (64, 64);
  $wht = imageColorAllocate ($img, 255, 255, 255);
  imageFill ($img, 0, 0, $wht);
  $red = imageColorAllocate ($img, 255, 0, 0);
  $x1 = 16; $y1 = 16; $x2 = 48; $y2 = 48;
  imageDashedLine ($img, $x1, $y1, $x1, $y2, $red);
  imageDashedLine ($img, $x1, $y1, $x2, $y2, $red);
  imageDashedLine ($img, $x1, $y1, $x2, $y1, $red);
  imageDashedLine ($img, $x2, $y2, $x1, $y2, $red);
  imageDashedLine ($img, $x1, $y2, $x2, $y1, $red);
  imageDashedLine ($img, $x2, $y1, $x2, $y2, $red);
  header ("Content-type: image/png");
  imagePNG ($img);

Should produce a red square with diagonal lines.  Instead it produces only the vertical lines, in a PNG found at 
  http://www.kyhm.com/gd/dashedline.png

Configure line:
./configure --with-apxs=/usr/local/sbin/apxs --with-config-file-path=/etc/httpd --enable-openssl=/usr/local --with-gd=/usr/local --with-jpeg-dir=/usr --with-tiff-dir=/usr --with-zlib=/usr --with-png-dir=/usr --with-xpm-dir=/usr/X11R6 --with-freetype-dir=/usr/local --with-t1lib=/usr/local --with-mysql=/usr/local --with-pdflib --with-pgsql --enable-readline=/usr --enable-trans-sid --enable-sockets --enable-memory-limit --enable-shared --with-mcrypt=/usr/local --enable-ctype --enable-bcmath --enable-ftp --enable-shmop

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 [2001-07-06 03:44 UTC] derick@php.net 
I complained about this too, a while ago (bug 11663).

The way it works in 4.0.6 is using imagesetstyle
with imageline, this is in new documentation at
imagedashedline.

However, IMHO:

<<steam>>
A function should not suddenly stop working. It either
should be dropped, or should continue to work as before.
At least not between minor releases. At least not without
_any_ warnings in release notes. (A mention about GD library
version change is not enough)
_any_ warnings in release notes. (A mention about GD library
version change is not enough)
<</steam>>

I worked around it with this (my client still has 4.0.5, I upgraded
to 4.0.6):

function MDashedLine($image, $x0, $y0, $x1, $y1, $fg, $bg)
{
    if (PHP_VERSION == "4.0.5") {
        ImageDashedLine($image, $x0, $y0, $x1, $y1, $fg);
    }
    else {
        $st = array($fg, $fg, $fg, $fg, $bg, $bg, $bg, $bg);
        ImageSetStyle($image, $st);
        ImageLine($image, $x0, $y0, $x1, $y1, IMG_COLOR_STYLED);
    }
} // MDashedLine
 [2001-07-06 03:45 UTC] derick@php.net 
I made this a documentation problem, because it's not really a bug in PHP.

derick
 [2001-07-06 04:53 UTC] kyhm at kyhm dot com 
Thanks for the prompt response, and I agree entirely about persistence of functions!  Since I've now seen the deprecation notice under imageDashedLine() and know what to change in my code, should I marked this as closed?
 [2001-07-06 07:44 UTC] wez@php.net 
It's a GD problem.
GD 2.0.1 is still BETA.
--Wez.
 [2001-07-06 07:50 UTC] derick@php.net 
Not a PHP bug, so closing
 
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