Posted by comp.lang.php on 06/22/07 13:18

Here is a visual example of what I mean.

Here is my original image:

http://valsignalandet.com/images/testshot.jpg

After I do this:


PHP Code:
if (!function_exists('imagerecreatetruecolor')) {
/**
* Recreate an existing image as a true color image {@link
http://us2.php.net/manual/en/function.imagerotate.php#62530 See notes
in imagerotate() for more information}
*
* @access public
* @param resource $image (reference)
* @return resource $image
*/
function &imagerecreatetruecolor(&$image) {
if (!imageistruecolor($image) &&
function_exists('imagecreatetruecolor')) {
list($width, $height) = array(@imagesx($image), @imagesy($image));
$tempImage = @imagecreatetruecolor($width, $height);
@imagecopy($tempImage, $image, 0, 0, 0, 0, $width, $height);
$image = $tempImage;
}
return $image;
}
}


/
*------------------------------------------------------------------------
---------------------------------------------------------------------------
Block to perform actions based upon checks. If you are to add text
you
will do a "imagefttext" function call;
if you are to add a border you will instantiate an
ImageBorderGenerator
class object; if you are to grayscale the
image you are to use the "imagecopymergegray" command ** and not
imagecopyresampled **
--------------------------------------------------------------------------
---------------------------------------------------------------------------
*/
// NOTE THAT NEGATIVE NUMBERS GO CLOCKWISE IN imagerotate(), I PREFER
NEGATIVE GO COUNTERCLOCKWISE AND POSITIVE GO CLOCKWISE
if ($this->isSuccessful && $image && isset($angle) &&
is_numeric($angle))
$image = @imagerotate(imagerecreatetruecolor($image), -1 * $angle,
0); // ROTATE IMAGE



Here is your resulting image:

http://valsignalandet.com/images/testshot2.jpg

That might make it a bit more clear as far as what I mean by the
"black
bar".

On Jun 20, 10:32 am, "comp.lang.php" <phillip.s.pow...@gmail.com>
wrote:
> On Jun 20, 10:02 am, Rik <luiheidsgoe...@hotmail.com> wrote:
>
>
>
>
>
> > On Wed, 20 Jun 2007 15:45:03 +0200, comp.lang.php
>
> > <phillip.s.pow...@gmail.com> wrote:
> > > Recap:
>
> > > Using imagerotate within PHP 4.3.9 - PHP 5.2.0 for both XP and Linux,
> > > all using GD2
>
> > > If you rotate an image 180 degrees, all is fine
>
> > > If you rotate an image > 0 degrees and < 180 degrees, or > 180 degrees
> > > and < 360 degrees, while the image will rotate, its dimensions are
> > > somehow not refactored and as a result you get a rather annoying black
> > > bar in the newly-rotated image, along with part of your image being
> > > cropped off.
>
> > > I learned about a possible workaround with ImageMagick's convert
> > > command, but has anyone found a better solution (other than using XP's
> > > built-in image rotation routines)?
>
> > Depends on what you want from it, how would you like it to behave on
> > arbitrary angle? Calculate the width & height needed for the new image,
> > create that, set the backgroundcolor of your choice on it, and paste the
> > image in it & rotate.
>
> I did that after imagerotate misbehaved the first time, however, it
> seems as if imagerotate ignored the newly-calculated height and weight
> options.
>
> Say for instance you have an image of 300 x 150. If you rotate 90
> degrees the image should be 150 x 300 with the image contents
> perfectly rotated. Instead you have an image of 150 x 300 with a big
> black bar on the right. This in spite of recalculating the correct
> height and width for the new image.
>
>
>
>
>
> > --
> > Rik Wasmus- Hide quoted text -
>
> > - Show quoted text -- Hide quoted text -
>
> - Show quoted text -- Hide quoted text -
>
> - Show quoted text -

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