ID: 12780
User updated by: [EMAIL PROTECTED]
Reported By: [EMAIL PROTECTED]
Status: Open
Bug Type: GD related
Operating System: Windows 2000
PHP Version: 4.0.6
New Comment:
The following was in the user manual. Could someone please apply this fix for the next
release?
[EMAIL PROTECTED]
01-Oct-2001 03:42
As reported above, there is a bug in this function which basically means it ignores
the srcX and srcY parameters. The fix is really easy, assuming you don't mind
recompiling GD.
You need to change the lines in gd.c that read:
p = gdImageGetTrueColorPixel ( src, (int) sx,
(int) sy;
to read:
p = gdImageGetTrueColorPixel ( src, (int) sx + srcX,
(int) sy + srcY;
Previous Comments:
[2001-08-31 06:42:42] [EMAIL PROTECTED]
[User input: [EMAIL PROTECTED]]
I have experienced an issue identical to bug #12780, on a
Linux machine running RedHat 7.1, Apache 1.3.20, PHP
4.0.6, and GD 2.0.1. The original bug was running under
Win2000.
[2001-08-15 22:31:16] [EMAIL PROTECTED]
The Source X and Y parameters are ignored by the function ImageCopyResampled. This may
be a bug with the GD 2.0.1 library itself, since an examination of gd.c lines
1960-2085 reveal no significant reference to these parameters. My e-mail to the
developers is getting bounced, so I turn to you. I used the setup program for Windows
to install PHP 4.0.6 on a fresh Windows 2000 machine, but I believe the problem is
platform independant.
Here's how to reproduce the bug:
1: Create a 200 x 200 JPEG image named grid.jpg. Divide it into four colored sqares
of equal size, just for the demonstration.
2: Create an HTML page with the following content:
p
img src=imgTest.php?src_w=100src_h=100 alt=(src_w=100, src_h=100)br
img src=imgTest.php?src_w=100src_h=100src_x=100 alt=(src_w=100, src_h=100,
src_x=100)br
img src=imgTest.php?src_w=100src_h=100src_y=100 alt=(src_w=100, src_h=100,
src_y=100)br
img src=imgTest.php?src_w=100src_h=100src_x=100src_y=100 alt=(src_w=100,
src_h=100, src_x=100, src_y=100)br
/p
p
img src=imgTest.php?mode=samplesrc_w=100src_h=100 alt=(src_w=100,
src_h=100)br
img src=imgTest.php?mode=samplesrc_w=100src_h=100src_x=100 alt=(src_w=100,
src_h=100, src_x=100)br
img src=imgTest.php?mode=samplesrc_w=100src_h=100src_y=100 alt=(src_w=100,
src_h=100, src_y=100)br
img src=imgTest.php?mode=samplesrc_w=100src_h=100src_x=100src_y=100
alt=(src_w=100, src_h=100, src_x=100, src_y=100)br
/p
3: Create a PHP page named imgTest.php with the following content:
?php
// test of the GD functions...
$src_img = ImageCreateFromJPEG(./grid.jpg);
if (empty($dest_x)) $dest_x = 0;
if (empty($dest_y)) $dest_y = 0;
if (empty($dest_w)) $dest_w = 100;
if (empty($dest_h)) $dest_h = 100;
if (empty($src_x)) $src_x = 0;
if (empty($src_y)) $src_y = 0;
if (empty($src_w)) $src_w = ImageSX($src_img);
if (empty($src_h)) $src_h = ImageSY($src_img);
$dst_img = ImageCreateTrueColor($dest_w, $dest_h);
if ($mode == sample) {
ImageCopyResampled( $dst_img, $src_img, $dest_x, $dest_y, $src_x, $src_y,
$dest_w, $dest_h, $src_w, $src_h);
} else {
ImageCopyResized( $dst_img, $src_img, $dest_x, $dest_y, $src_x, $src_y,
$dest_w, $dest_h, $src_w, $src_h);
}
header(Content-type: image/JPEG);
ImageJPEG($dst_img);
ImageDestroy($dst_img);
ImageDestroy($src_img);
?
The result is that the bottom group of squares will all be from the upper left corner,
while the top group of squares will be separate corners. This shows that the functions
are not interchangable.
Edit this bug report at http://bugs.php.net/?id=12780edit=1
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