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mujma: BUGFIX: Added rotatePixelByPixel method to add rotate functionality on machines where imagerotate function it's not available Ubuntu. (merged from branches/gsoc)

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git-svn-id: svn://svn.silverstripe.com/silverstripe/open/modules/sapphire/trunk@41718 467b73ca-7a2a-4603-9d3b-597d59a354a9
This commit is contained in:
Ingo Schommer 2007-09-14 01:52:50 +00:00
parent 85bd9b0460
commit 5a74d0e63d
1 changed files with 48 additions and 2 deletions
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50
filesystem/GD.php
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@ -135,13 +135,59 @@ class GD extends Object {
function rotate($angle) {
if(!$this->gd) return;
$newGD = imagerotate($this->gd, $angle,0);
if(function_exists("imagerotate")) {
$newGD = imagerotate($this->gd, $angle,0);
} else {
//imagerotate is not included in PHP included in Ubuntu
$newGD = $this->rotatePixelByPixel($angle);
}
$output = new GD();
$output->setGD($newGD);
return $output;
}
/**
* Rotates image by given angle. It's slow because makes it pixel by pixel rather than
* using built-in function. Used when imagerotate function is not available(i.e. Ubuntu)
*
* @param angle
* @return GD
*/
function rotatePixelByPixel($angle) {
$sourceWidth = imagesx($this->gd);
$sourceHeight = imagesy($this->gd);
if ($angle == 180) {
$destWidth = $sourceWidth;
$destHeight = $sourceHeight;
} else {
$destWidth = $sourceHeight;
$destHeight = $sourceWidth;
}
$rotate=imagecreatetruecolor($destWidth,$destHeight);
imagealphablending($rotate, false);
for ($x = 0; $x < ($sourceWidth); $x++) {
for ($y = 0; $y < ($sourceHeight); $y++) {
$color = imagecolorat($this->gd, $x, $y);
switch ($angle) {
case 90:
imagesetpixel($rotate, $y, $destHeight - $x - 1, $color);
break;
case 180:
imagesetpixel($rotate, $destWidth - $x - 1, $destHeight - $y - 1, $color);
break;
case 270:
imagesetpixel($rotate, $destWidth - $y - 1, $x, $color);
break;
default: $rotate = $this->gd;
};
}
}
return $rotate;
}
/**
* Crop's part of image.
*