/home/edulekha/studygroup.edulekha.com/ow_libraries/wideimage/PaletteImage.php
<?php
/**
* @author Gasper Kozak
* @copyright 2007-2011
This file is part of WideImage.
WideImage is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
WideImage is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with WideImage; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
* @package WideImage
**/
/**
* @package WideImage
*/
class WideImage_PaletteImage extends WideImage_Image
{
/**
* Create a palette image
*
* @param int $width
* @param int $height
* @return WideImage_PaletteImage
*/
static function create($width, $height)
{
if ($width * $height <= 0 || $width < 0)
throw new WideImage_InvalidImageDimensionException("Can't create an image with dimensions [$width, $height].");
return new WideImage_PaletteImage(imagecreate($width, $height));
}
function doCreate($width, $height)
{
return self::create($width, $height);
}
/**
* (non-PHPdoc)
* @see WideImage_Image#isTrueColor()
*/
function isTrueColor()
{
return false;
}
/**
* (non-PHPdoc)
* @see WideImage_Image#asPalette($nColors, $dither, $matchPalette)
*/
function asPalette($nColors = 255, $dither = null, $matchPalette = true)
{
return $this->copy();
}
/**
* Returns a copy of the image
*
* @param $trueColor True if the new image should be truecolor
* @return WideImage_Image
*/
protected function copyAsNew($trueColor = false)
{
$width = $this->getWidth();
$height = $this->getHeight();
if ($trueColor)
$new = WideImage_TrueColorImage::create($width, $height);
else
$new = WideImage_PaletteImage::create($width, $height);
// copy transparency of source to target
if ($this->isTransparent())
{
$rgb = $this->getTransparentColorRGB();
if (is_array($rgb))
{
$tci = $new->allocateColor($rgb['red'], $rgb['green'], $rgb['blue']);
$new->fill(0, 0, $tci);
$new->setTransparentColor($tci);
}
}
imageCopy($new->getHandle(), $this->handle, 0, 0, 0, 0, $width, $height);
return $new;
}
/**
* (non-PHPdoc)
* @see WideImage_Image#asTrueColor()
*/
function asTrueColor()
{
$width = $this->getWidth();
$height = $this->getHeight();
$new = WideImage::createTrueColorImage($width, $height);
if ($this->isTransparent())
$new->copyTransparencyFrom($this);
if (!imageCopy($new->getHandle(), $this->handle, 0, 0, 0, 0, $width, $height))
throw new WideImage_GDFunctionResultException("imagecopy() returned false");
return $new;
}
/**
* (non-PHPdoc)
* @see WideImage_Image#getChannels()
*/
function getChannels()
{
$args = func_get_args();
if (count($args) == 1 && is_array($args[0]))
$args = $args[0];
return WideImage_OperationFactory::get('CopyChannelsPalette')->execute($this, $args);
}
/**
* (non-PHPdoc)
* @see WideImage_Image#copyNoAlpha()
*/
function copyNoAlpha()
{
return WideImage_Image::loadFromString($this->asString('png'));
}
}