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first commit of free version

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Llewellyn van der Merwe
2016-01-30 22:28:43 +02:00
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153
admin/compiler/joomla_3/wideimage/Operation/AddNoise.php Normal file
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<?php
/**
* @author Tomasz Kapusta
* @copyright 2010
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 Internal/Operations
**/
/**
* Noise filter
*
* @package Internal/Operations
*/
class WideImage_Operation_AddNoise {
/**
* Returns image with noise added
*
* @param WideImage_Image $image
* @param float $amount
* @param const $type
* @param float $threshold
* @return WideImage_Image
*/
function execute($image, $amount, $type) {
switch ($type)
{
case 'salt&pepper' : $fun = 'saltPepperNoise_fun';
break;
case 'color' : $fun = 'colorNoise_fun';
break;
default : $fun = 'monoNoise_fun';
break;
}
return self::filter($image->asTrueColor(), $fun, $amount);
}
/**
* Returns image with every pixel changed by specififed function
*
* @param WideImage_Image $image
* @param str $function
* @param int $value
* @return WideImage_Image
*/
function filter($image, $function, $value)
{
for ($y = 0; $y < $image->getHeight(); $y++)
{
for ($x = 0; $x< $image->getWidth(); $x++)
{
$rgb = imagecolorat($image->getHandle(), $x, $y);
$a = ($rgb >> 24) & 0xFF;
$r = ($rgb >> 16) & 0xFF;
$g = ($rgb >> 8) & 0xFF;
$b = $rgb & 0xFF;
self::$function($r, $g, $b, $value);
$color = imagecolorallocatealpha($image->getHandle(), $r, $g, $b, $a);
imagesetpixel($image->getHandle(), $x, $y, $color);
}
}
return $image;
}
/**
* Adds color noise by altering given R,G,B values using specififed amount
*
* @param int $r
* @param int $g
* @param int $b
* @param int $value
* @return void
*/
function colorNoise_fun(&$r, &$g, &$b, $amount)
{
$r = self::byte($r + mt_rand(0, $amount) - ($amount >> 1) );
$g = self::byte($g + mt_rand(0, $amount) - ($amount >> 1) );
$b = self::byte($b + mt_rand(0, $amount) - ($amount >> 1) );
}
/**
* Adds mono noise by altering given R,G,B values using specififed amount
*
* @param int $r
* @param int $g
* @param int $b
* @param int $value
* @return void
*/
function monoNoise_fun(&$r, &$g, &$b, $amount)
{
$rand = mt_rand(0, $amount) - ($amount >> 1);
$r = self::byte($r + $rand);
$g = self::byte($g + $rand);
$b = self::byte($b + $rand);
}
/**
* Adds salt&pepper noise by altering given R,G,B values using specififed amount
*
* @param int $r
* @param int $g
* @param int $b
* @param int $value
* @return void
*/
function saltPepperNoise_fun(&$r, &$g, &$b, $amount)
{
if (mt_rand(0, 255 - $amount) != 0) return;
$rand = mt_rand(0, 1);
switch ($rand)
{
case 0 : $r = $g = $b = 0;
break;
case 1 : $r = $g = $b = 255;
break;
}
}
/**
* Returns value within (0,255)
*
* @param int $b
* @return int
*/
function byte($b)
{
if ($b > 255) return 255;
if ($b < 0) return 0;
return (int) $b;
}
}

48
admin/compiler/joomla_3/wideimage/Operation/ApplyConvolution.php Normal file
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<?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 Internal/Operations
**/
/**
* ApplyConvolution operation class
*
* @package Internal/Operations
*/
class WideImage_Operation_ApplyConvolution
{
/**
* Executes imageconvolution() filter
*
* @param WideImage_Image $image
* @param array $matrix
* @param numeric $div
* @param numeric $offset
* @return WideImage_Image
*/
function execute($image, $matrix, $div, $offset)
{
$new = $image->asTrueColor();
if (!imageconvolution($new->getHandle(), $matrix, $div, $offset))
throw new WideImage_GDFunctionResultException("imageconvolution() returned false");
return $new;
}
}

67
admin/compiler/joomla_3/wideimage/Operation/ApplyFilter.php Normal file
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<?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 Internal/Operations
**/
/**
* ApplyFilter operation class
*
* @package Internal/Operations
*/
class WideImage_Operation_ApplyFilter
{
/**
* A list of filters that only accept one arguments for imagefilter()
*
* @var array
*/
static protected $one_arg_filters = array(IMG_FILTER_SMOOTH, IMG_FILTER_CONTRAST, IMG_FILTER_BRIGHTNESS);
/**
* Executes imagefilter
*
* @param WideImage_Image $image
* @param int $filter
* @param numeric $arg1
* @param numeric $arg2
* @param numeric $arg3
* @return WideImage_TrueColorImage
*/
function execute($image, $filter, $arg1 = null, $arg2 = null, $arg3 = null, $arg4 = null)
{
$new = $image->asTrueColor();
if (in_array($filter, self::$one_arg_filters))
$res = imagefilter($new->getHandle(), $filter, $arg1);
elseif (defined('IMG_FILTER_PIXELATE') && $filter == IMG_FILTER_PIXELATE)
$res = imagefilter($new->getHandle(), $filter, $arg1, $arg2);
elseif ($filter == IMG_FILTER_COLORIZE)
$res = imagefilter($new->getHandle(), $filter, $arg1, $arg2, $arg3, $arg4);
else
$res = imagefilter($new->getHandle(), $filter);
if (!$res)
throw new WideImage_GDFunctionResultException("imagefilter() returned false");
return $new;
}
}

105
admin/compiler/joomla_3/wideimage/Operation/ApplyMask.php Normal file
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<?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 Internal/Operations
**/
/**
* ApplyMask operation class
*
* @package Internal/Operations
*/
class WideImage_Operation_ApplyMask
{
/**
* Applies a mask on the copy of source image
*
* @param WideImage_Image $image
* @param WideImage_Image $mask
* @param smart_coordinate $left
* @param smart_coordinate $top
* @return WideImage_Image
*/
function execute($image, $mask, $left = 0, $top = 0)
{
$left = WideImage_Coordinate::fix($left, $image->getWidth(), $mask->getWidth());
$top = WideImage_Coordinate::fix($top, $image->getHeight(), $mask->getHeight());
$width = $image->getWidth();
$mask_width = $mask->getWidth();
$height = $image->getHeight();
$mask_height = $mask->getHeight();
$result = $image->asTrueColor();
$result->alphaBlending(false);
$result->saveAlpha(true);
$srcTransparentColor = $result->getTransparentColor();
if ($srcTransparentColor >= 0)
{
# this was here. works without.
#$trgb = $image->getColorRGB($srcTransparentColor);
#$trgb['alpha'] = 127;
#$destTransparentColor = $result->allocateColorAlpha($trgb);
#$result->setTransparentColor($destTransparentColor);
$destTransparentColor = $srcTransparentColor;
}
else
{
$destTransparentColor = $result->allocateColorAlpha(255, 255, 255, 127);
}
for ($x = 0; $x < $width; $x++)
for ($y = 0; $y < $height; $y++)
{
$mx = $x - $left;
$my = $y - $top;
if ($mx >= 0 && $mx < $mask_width && $my >= 0 && $my < $mask_height)
{
$srcColor = $image->getColorAt($x, $y);
if ($srcColor == $srcTransparentColor)
$destColor = $destTransparentColor;
else
{
$maskRGB = $mask->getRGBAt($mx, $my);
if ($maskRGB['red'] == 0)
$destColor = $destTransparentColor;
elseif ($srcColor >= 0)
{
$imageRGB = $image->getRGBAt($x, $y);
$level = ($maskRGB['red'] / 255) * (1 - $imageRGB['alpha'] / 127);
$imageRGB['alpha'] = 127 - round($level * 127);
if ($imageRGB['alpha'] == 127)
$destColor = $destTransparentColor;
else
$destColor = $result->allocateColorAlpha($imageRGB);
}
else
$destColor = $destTransparentColor;
}
$result->setColorAt($x, $y, $destColor);
}
}
return $result;
}
}

49
admin/compiler/joomla_3/wideimage/Operation/AsGrayscale.php Normal file
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<?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 Internal/Operations
**/
/**
* AsGrayscale operation class
*
* @package Internal/Operations
*/
class WideImage_Operation_AsGrayscale
{
/**
* Returns a greyscale copy of an image
*
* @param WideImage_Image $image
* @return WideImage_Image
*/
function execute($image)
{
$new = $image->asTrueColor();
if (!imagefilter($new->getHandle(), IMG_FILTER_GRAYSCALE))
throw new WideImage_GDFunctionResultException("imagefilter() returned false");
if (!$image->isTrueColor())
$new = $new->asPalette();
return $new;
}
}

63
admin/compiler/joomla_3/wideimage/Operation/AsNegative.php Normal file
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<?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 Internal/Operations
**/
/**
* AsNegative operation class
*
* @package Internal/Operations
*/
class WideImage_Operation_AsNegative
{
/**
* Returns a greyscale copy of an image
*
* @param WideImage_Image $image
* @return WideImage_Image
*/
function execute($image)
{
$palette = !$image->isTrueColor();
$transparent = $image->isTransparent();
if ($palette && $transparent)
$tcrgb = $image->getTransparentColorRGB();
$new = $image->asTrueColor();
if (!imagefilter($new->getHandle(), IMG_FILTER_NEGATE))
throw new WideImage_GDFunctionResultException("imagefilter() returned false");
if ($palette)
{
$new = $new->asPalette();
if ($transparent)
{
$irgb = array('red' => 255 - $tcrgb['red'], 'green' => 255 - $tcrgb['green'], 'blue' => 255 - $tcrgb['blue'], 'alpha' => 127);
// needs imagecolorexactalpha instead of imagecolorexact, otherwise doesn't work on some transparent GIF images
$new_tci = imagecolorexactalpha($new->getHandle(), $irgb['red'], $irgb['green'], $irgb['blue'], 127);
$new->setTransparentColor($new_tci);
}
}
return $new;
}
}

162
admin/compiler/joomla_3/wideimage/Operation/AutoCrop.php Normal file
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<?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 Internal/Operations
**/
/**
* AutoCrop operation
*
* @package Internal/Operations
*/
class WideImage_Operation_AutoCrop
{
/**
* Executes the auto-crop operation on the $img
*
* @param WideImage_Image $img
* @param int $rgb_threshold The difference in RGB from $base_color
* @param int $pixel_cutoff The number of pixels on each border that must be over $rgb_threshold
* @param int $base_color The color that will get cropped
* @return WideImage_Image resulting auto-cropped image
*/
function execute($img, $margin, $rgb_threshold, $pixel_cutoff, $base_color)
{
$margin = intval($margin);
$rgb_threshold = intval($rgb_threshold);
if ($rgb_threshold < 0)
$rgb_threshold = 0;
$pixel_cutoff = intval($pixel_cutoff);
if ($pixel_cutoff <= 1)
$pixel_cutoff = 1;
if ($base_color === null)
$rgb_base = $img->getRGBAt(0, 0);
else
{
if ($base_color < 0)
return $img->copy();
$rgb_base = $img->getColorRGB($base_color);
}
$cut_rect = array('left' => 0, 'top' => 0, 'right' => $img->getWidth() - 1, 'bottom' => $img->getHeight() - 1);
for ($y = 0; $y <= $cut_rect['bottom']; $y++)
{
$count = 0;
for ($x = 0; $x <= $cut_rect['right']; $x++)
{
$rgb = $img->getRGBAt($x, $y);
$diff = abs($rgb['red'] - $rgb_base['red']) + abs($rgb['green'] - $rgb_base['green']) + abs($rgb['blue'] - $rgb_base['blue']);
if ($diff > $rgb_threshold)
{
$count++;
if ($count >= $pixel_cutoff)
{
$cut_rect['top'] = $y;
break 2;
}
}
}
}
for ($y = $img->getHeight() - 1; $y >= $cut_rect['top']; $y--)
{
$count = 0;
for ($x = 0; $x <= $cut_rect['right']; $x++)
{
$rgb = $img->getRGBAt($x, $y);
$diff = abs($rgb['red'] - $rgb_base['red']) + abs($rgb['green'] - $rgb_base['green']) + abs($rgb['blue'] - $rgb_base['blue']);
if ($diff > $rgb_threshold)
{
$count++;
if ($count >= $pixel_cutoff)
{
$cut_rect['bottom'] = $y;
break 2;
}
}
}
}
for ($x = 0; $x <= $cut_rect['right']; $x++)
{
$count = 0;
for ($y = $cut_rect['top']; $y <= $cut_rect['bottom']; $y++)
{
$rgb = $img->getRGBAt($x, $y);
$diff = abs($rgb['red'] - $rgb_base['red']) + abs($rgb['green'] - $rgb_base['green']) + abs($rgb['blue'] - $rgb_base['blue']);
if ($diff > $rgb_threshold)
{
$count++;
if ($count >= $pixel_cutoff)
{
$cut_rect['left'] = $x;
break 2;
}
}
}
}
for ($x = $cut_rect['right']; $x >= $cut_rect['left']; $x--)
{
$count = 0;
for ($y = $cut_rect['top']; $y <= $cut_rect['bottom']; $y++)
{
$rgb = $img->getRGBAt($x, $y);
$diff = abs($rgb['red'] - $rgb_base['red']) + abs($rgb['green'] - $rgb_base['green']) + abs($rgb['blue'] - $rgb_base['blue']);
if ($diff > $rgb_threshold)
{
$count++;
if ($count >= $pixel_cutoff)
{
$cut_rect['right'] = $x;
break 2;
}
}
}
}
$cut_rect = array(
'left' => $cut_rect['left'] - $margin,
'top' => $cut_rect['top'] - $margin,
'right' => $cut_rect['right'] + $margin,
'bottom' => $cut_rect['bottom'] + $margin
);
if ($cut_rect['left'] < 0)
$cut_rect['left'] = 0;
if ($cut_rect['top'] < 0)
$cut_rect['top'] = 0;
if ($cut_rect['right'] >= $img->getWidth())
$cut_rect['right'] = $img->getWidth() - 1;
if ($cut_rect['bottom'] >= $img->getHeight())
$cut_rect['bottom'] = $img->getHeight() - 1;
return $img->crop($cut_rect['left'], $cut_rect['top'], $cut_rect['right'] - $cut_rect['left'] + 1, $cut_rect['bottom'] - $cut_rect['top'] + 1);
}
}

90
admin/compiler/joomla_3/wideimage/Operation/CopyChannelsPalette.php Normal file
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<?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 Internal/Operations
**/
/**
* CopyChannelsPalette operation class
*
* This operation is intended to be used on palette images
*
* @package Internal/Operations
*/
class WideImage_Operation_CopyChannelsPalette
{
/**
* Returns an image with only specified channels copied
*
* @param WideImage_PaletteImage $img
* @param array $channels
* @return WideImage_PaletteImage
*/
function execute($img, $channels)
{
$blank = array('red' => 0, 'green' => 0, 'blue' => 0);
if (isset($channels['alpha']))
unset($channels['alpha']);
$width = $img->getWidth();
$height = $img->getHeight();
$copy = WideImage_PaletteImage::create($width, $height);
if ($img->isTransparent())
{
$otci = $img->getTransparentColor();
$TRGB = $img->getColorRGB($otci);
$tci = $copy->allocateColor($TRGB);
}
else
{
$otci = null;
$tci = null;
}
for ($x = 0; $x < $width; $x++)
for ($y = 0; $y < $height; $y++)
{
$ci = $img->getColorAt($x, $y);
if ($ci === $otci)
{
$copy->setColorAt($x, $y, $tci);
continue;
}
$RGB = $img->getColorRGB($ci);
$newRGB = $blank;
foreach ($channels as $channel)
$newRGB[$channel] = $RGB[$channel];
$color = $copy->getExactColor($newRGB);
if ($color == -1)
$color = $copy->allocateColor($newRGB);
$copy->setColorAt($x, $y, $color);
}
if ($img->isTransparent())
$copy->setTransparentColor($tci);
return $copy;
}
}

67
admin/compiler/joomla_3/wideimage/Operation/CopyChannelsTrueColor.php Normal file
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<?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 Internal/Operations
**/
/**
* CopyChannelsTrueColor operation class
*
* Used to perform CopyChannels operation on truecolor images
*
* @package Internal/Operations
*/
class WideImage_Operation_CopyChannelsTrueColor
{
/**
* Returns an image with only specified channels copied
*
* @param WideImage_Image $img
* @param array $channels
* @return WideImage_Image
*/
function execute($img, $channels)
{
$blank = array('red' => 0, 'green' => 0, 'blue' => 0, 'alpha' => 0);
$width = $img->getWidth();
$height = $img->getHeight();
$copy = WideImage_TrueColorImage::create($width, $height);
if (count($channels) > 0)
for ($x = 0; $x < $width; $x++)
for ($y = 0; $y < $height; $y++)
{
$RGBA = $img->getRGBAt($x, $y);
$newRGBA = $blank;
foreach ($channels as $channel)
$newRGBA[$channel] = $RGBA[$channel];
$color = $copy->getExactColorAlpha($newRGBA);
if ($color == -1)
$color = $copy->allocateColorAlpha($newRGBA);
$copy->setColorAt($x, $y, $color);
}
return $copy;
}
}

48
admin/compiler/joomla_3/wideimage/Operation/CorrectGamma.php Normal file
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<?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 Internal/Operations
**/
/**
* CorrectGamma operation class
*
* @package Internal/Operations
*/
class WideImage_Operation_CorrectGamma
{
/**
* Executes imagegammacorrect()
*
* @param WideImage_Image $image
* @param numeric $input_gamma
* @param numeric $output_gamma
* @return WideImage_TrueColorImage
*/
function execute($image, $input_gamma, $output_gamma)
{
$new = $image->copy();
if (!imagegammacorrect($new->getHandle(), $input_gamma, $output_gamma))
throw new WideImage_GDFunctionResultException("imagegammacorrect() returned false");
return $new;
}
}

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<?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 Internal/Operations
**/
/**
* Crop operation class
*
* @package Internal/Operations
*/
class WideImage_Operation_Crop
{
/**
* Returns a cropped image
*
* @param WideImage_Image $img
* @param smart_coordinate $left
* @param smart_coordinate $top
* @param smart_coordinate $width
* @param smart_coordinate $height
* @return WideImage_Image
*/
function execute($img, $left, $top, $width, $height)
{
$width = WideImage_Coordinate::fix($width, $img->getWidth(), $width);
$height = WideImage_Coordinate::fix($height, $img->getHeight(), $height);
$left = WideImage_Coordinate::fix($left, $img->getWidth(), $width);
$top = WideImage_Coordinate::fix($top, $img->getHeight(), $height);
if ($left < 0)
{
$width = $left + $width;
$left = 0;
}
if ($width > $img->getWidth() - $left)
$width = $img->getWidth() - $left;
if ($top < 0)
{
$height = $top + $height;
$top = 0;
}
if ($height > $img->getHeight() - $top)
$height = $img->getHeight() - $top;
if ($width <= 0 || $height <= 0)
throw new WideImage_Exception("Can't crop outside of an image.");
$new = $img->doCreate($width, $height);
if ($img->isTransparent() || $img instanceof WideImage_PaletteImage)
{
$new->copyTransparencyFrom($img);
if (!imagecopyresized($new->getHandle(), $img->getHandle(), 0, 0, $left, $top, $width, $height, $width, $height))
throw new WideImage_GDFunctionResultException("imagecopyresized() returned false");
}
else
{
$new->alphaBlending(false);
$new->saveAlpha(true);
if (!imagecopyresampled($new->getHandle(), $img->getHandle(), 0, 0, $left, $top, $width, $height, $width, $height))
throw new WideImage_GDFunctionResultException("imagecopyresampled() returned false");
}
return $new;
}
}

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<?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 Internal/Operations
**/
/**
* Flip operation class
*
* @package Internal/Operations
*/
class WideImage_Operation_Flip
{
/**
* Returns a flipped image
*
* @param WideImage_Image $image
* @return WideImage_Image
*/
function execute($image)
{
$new = $image->copy();
$width = $image->getWidth();
$height = $image->getHeight();
if ($new->isTransparent())
imagefilledrectangle($new->getHandle(), 0, 0, $width, $height, $new->getTransparentColor());
for ($y = 0; $y < $height; $y++)
if (!imagecopy($new->getHandle(), $image->getHandle(), 0, $y, 0, $height - $y - 1, $width, 1))
throw new WideImage_GDFunctionResultException("imagecopy() returned false");
return $new;
}
}

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<?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 Internal/Operations
**/
/**
* GetMask operation class
*
* @package Internal/Operations
*/
class WideImage_Operation_GetMask
{
/**
* Returns a mask
*
* @param WideImage_Image $image
* @return WideImage_Image
*/
function execute($image)
{
$width = $image->getWidth();
$height = $image->getHeight();
$mask = WideImage_TrueColorImage::create($width, $height);
$mask->setTransparentColor(-1);
$mask->alphaBlending(false);
$mask->saveAlpha(false);
for ($i = 0; $i <= 255; $i++)
$greyscale[$i] = ImageColorAllocate($mask->getHandle(), $i, $i, $i);
imagefilledrectangle($mask->getHandle(), 0, 0, $width, $height, $greyscale[255]);
$transparentColor = $image->getTransparentColor();
$alphaToGreyRatio = 255 / 127;
for ($x = 0; $x < $width; $x++)
for ($y = 0; $y < $height; $y++)
{
$color = $image->getColorAt($x, $y);
if ($color == $transparentColor)
$rgba['alpha'] = 127;
else
$rgba = $image->getColorRGB($color);
imagesetpixel($mask->getHandle(), $x, $y, $greyscale[255 - round($rgba['alpha'] * $alphaToGreyRatio)]);
}
return $mask;
}
}

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<?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 Internal/Operations
**/
/**
* Merge operation class
*
* @package Internal/Operations
*/
class WideImage_Operation_Merge
{
/**
* Returns a merged image
*
* @param WideImage_Image $base
* @param WideImage_Image $overlay
* @param smart_coordinate $left
* @param smart_coordinate $top
* @param numeric $pct
* @return WideImage_Image
*/
function execute($base, $overlay, $left, $top, $pct)
{
$x = WideImage_Coordinate::fix($left, $base->getWidth(), $overlay->getWidth());
$y = WideImage_Coordinate::fix($top, $base->getHeight(), $overlay->getHeight());
$result = $base->asTrueColor();
$result->alphaBlending(true);
$result->saveAlpha(true);
if ($pct <= 0)
return $result;
if ($pct < 100)
{
if (!imagecopymerge(
$result->getHandle(),
$overlay->getHandle(),
$x, $y, 0, 0,
$overlay->getWidth(),
$overlay->getHeight(),
$pct))
throw new WideImage_GDFunctionResultException("imagecopymerge() returned false");
}
else
{
if (!imagecopy(
$result->getHandle(),
$overlay->getHandle(),
$x, $y, 0, 0,
$overlay->getWidth(),
$overlay->getHeight()))
throw new WideImage_GDFunctionResultException("imagecopy() returned false");
}
return $result;
}
}

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<?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 Internal/Operations
**/
/**
* Mirror operation class
*
* @package Internal/Operations
*/
class WideImage_Operation_Mirror
{
/**
* Returns a mirrored image
*
* @param WideImage_Image $image
* @return WideImage_Image
*/
function execute($image)
{
$new = $image->copy();
$width = $image->getWidth();
$height = $image->getHeight();
if ($new->isTransparent())
imagefilledrectangle($new->getHandle(), 0, 0, $width, $height, $new->getTransparentColor());
for ($x = 0; $x < $width; $x++)
{
if (!imagecopy($new->getHandle(), $image->getHandle(), $x, 0, $width - $x - 1, 0, 1, $height))
throw new WideImage_GDFunctionResultException("imagecopy() returned false");
}
return $new;
}
}

157
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<?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 Internal/Operations
**/
/**
* An Exception for when an invalid fit method is passed
*
* @package Internal/Operations
*/
class WideImage_Operation_InvalidFitMethodException extends WideImage_Exception {}
/**
* An Exception for when an invalid resize dimensions are passed
*
* @package Internal/Operations
*/
class WideImage_Operation_InvalidResizeDimensionException extends WideImage_Exception {}
/**
* Resize operation class
*
* @package Internal/Operations
*/
class WideImage_Operation_Resize
{
/**
* Prepares and corrects smart coordinates
*
* @param WideImage_Image $img
* @param smart_coordinate $width
* @param smart_coordinate $height
* @param string $fit
* @return array
*/
protected function prepareDimensions($img, $width, $height, $fit)
{
if ($width === null && $height === null)
{
$width = $img->getWidth();
$height = $img->getHeight();
}
if ($width !== null)
$width = WideImage_Coordinate::fix($width, $img->getWidth());
if ($height !== null)
$height = WideImage_Coordinate::fix($height, $img->getHeight());
if ($width === null)
$width = floor($img->getWidth() * $height / $img->getHeight());
if ($height === null)
$height = floor($img->getHeight() * $width / $img->getWidth());
if ($width === 0 || $height === 0)
return array('width' => 0, 'height' => 0);
if ($fit == null)
$fit = 'inside';
$dim = array();
if ($fit == 'fill')
{
$dim['width'] = $width;
$dim['height'] = $height;
}
elseif ($fit == 'inside' || $fit == 'outside')
{
$rx = $img->getWidth() / $width;
$ry = $img->getHeight() / $height;
if ($fit == 'inside')
$ratio = ($rx > $ry) ? $rx : $ry;
else
$ratio = ($rx < $ry) ? $rx : $ry;
$dim['width'] = round($img->getWidth() / $ratio);
$dim['height'] = round($img->getHeight() / $ratio);
}
else
throw new WideImage_Operation_InvalidFitMethodException("{$fit} is not a valid resize-fit method.");
return $dim;
}
/**
* Returns a resized image
*
* @param WideImage_Image $img
* @param smart_coordinate $width
* @param smart_coordinate $height
* @param string $fit
* @param string $scale
* @return WideImage_Image
*/
function execute($img, $width, $height, $fit, $scale)
{
$dim = $this->prepareDimensions($img, $width, $height, $fit);
if (($scale === 'down' && ($dim['width'] >= $img->getWidth() && $dim['height'] >= $img->getHeight())) ||
($scale === 'up' && ($dim['width'] <= $img->getWidth() && $dim['height'] <= $img->getHeight())))
$dim = array('width' => $img->getWidth(), 'height' => $img->getHeight());
if ($dim['width'] <= 0 || $dim['height'] <= 0)
throw new WideImage_Operation_InvalidResizeDimensionException("Both dimensions must be larger than 0.");
if ($img->isTransparent() || $img instanceof WideImage_PaletteImage)
{
$new = WideImage_PaletteImage::create($dim['width'], $dim['height']);
$new->copyTransparencyFrom($img);
if (!imagecopyresized(
$new->getHandle(),
$img->getHandle(),
0, 0, 0, 0,
$new->getWidth(),
$new->getHeight(),
$img->getWidth(),
$img->getHeight()))
throw new WideImage_GDFunctionResultException("imagecopyresized() returned false");
}
else
{
$new = WideImage_TrueColorImage::create($dim['width'], $dim['height']);
$new->alphaBlending(false);
$new->saveAlpha(true);
if (!imagecopyresampled(
$new->getHandle(),
$img->getHandle(),
0, 0, 0, 0,
$new->getWidth(),
$new->getHeight(),
$img->getWidth(),
$img->getHeight()))
throw new WideImage_GDFunctionResultException("imagecopyresampled() returned false");
$new->alphaBlending(true);
}
return $new;
}
}

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<?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 Internal/Operations
**/
/**
* ResizeCanvas operation class
*
* @package Internal/Operations
*/
class WideImage_Operation_ResizeCanvas
{
/**
* Returns an image with a resized canvas
*
* The image is filled with $color. Use $scale to determine, when to resize.
*
* @param WideImage_Image $img
* @param smart_coordinate $width
* @param smart_coordinate $height
* @param smart_coordinate $left
* @param smart_coordinate $top
* @param int $color
* @param string $scale 'up', 'down', 'any'
* @param boolean $merge
* @return WideImage_Image
*/
function execute($img, $width, $height, $left, $top, $color, $scale, $merge)
{
$new_width = WideImage_Coordinate::fix($width, $img->getWidth());
$new_height = WideImage_Coordinate::fix($height, $img->getHeight());
if ($scale == 'down')
{
$new_width = min($new_width, $img->getWidth());
$new_height = min($new_height, $img->getHeight());
}
elseif ($scale == 'up')
{
$new_width = max($new_width, $img->getWidth());
$new_height = max($new_height, $img->getHeight());
}
$new = WideImage::createTrueColorImage($new_width, $new_height);
if ($img->isTrueColor())
{
if ($color === null)
$color = $new->allocateColorAlpha(0, 0, 0, 127);
}
else
{
imagepalettecopy($new->getHandle(), $img->getHandle());
if ($img->isTransparent())
{
$new->copyTransparencyFrom($img);
$tc_rgb = $img->getTransparentColorRGB();
$t_color = $new->allocateColorAlpha($tc_rgb);
}
if ($color === null)
{
if ($img->isTransparent())
$color = $t_color;
else
$color = $new->allocateColorAlpha(255, 0, 127, 127);
imagecolortransparent($new->getHandle(), $color);
}
}
$new->fill(0, 0, $color);
$x = WideImage_Coordinate::fix($left, $new->getWidth(), $img->getWidth());
$y = WideImage_Coordinate::fix($top, $new->getHeight(), $img->getHeight());
// blending for truecolor images
if ($img->isTrueColor())
$new->alphaBlending($merge);
// not-blending for palette images
if (!$merge && !$img->isTrueColor() && isset($t_color))
$new->getCanvas()->filledRectangle($x, $y, $x + $img->getWidth(), $y + $img->getHeight(), $t_color);
$img->copyTo($new, $x, $y);
return $new;
}
}

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<?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 Internal/Operations
**/
/**
* Rotate operation class
*
* @package Internal/Operations
*/
class WideImage_Operation_Rotate
{
/**
* Returns rotated image
*
* @param WideImage_Image $image
* @param numeric $angle
* @param int $bgColor
* @param bool $ignoreTransparent
* @return WideImage_Image
*/
function execute($image, $angle, $bgColor, $ignoreTransparent)
{
$angle = -floatval($angle);
if ($angle < 0)
$angle = 360 + $angle;
$angle = $angle % 360;
if ($angle == 0)
return $image->copy();
$image = $image->asTrueColor();
if ($bgColor === null)
{
$bgColor = $image->getTransparentColor();
if ($bgColor == -1)
{
$bgColor = $image->allocateColorAlpha(255, 255, 255, 127);
imagecolortransparent($image->getHandle(), $bgColor);
}
}
return new WideImage_TrueColorImage(imagerotate($image->getHandle(), $angle, $bgColor, $ignoreTransparent));
}
}

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<?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 Internal/Operations
**/
/**
* ApplyMask operation class
*
* @package Internal/Operations
*/
class WideImage_Operation_RoundCorners
{
/**
* @param WideImage_Image $image
* @param int $radius
* @param int $color
* @param int $smoothness
* @return WideImage_Image
*/
function execute($image, $radius, $color, $smoothness, $corners)
{
if ($smoothness < 1)
$sample_ratio = 1;
elseif ($smoothness > 16)
$sample_ratio = 16;
else
$sample_ratio = $smoothness;
$corner = WideImage::createTrueColorImage($radius * $sample_ratio, $radius * $sample_ratio);
if ($color === null)
{
imagepalettecopy($corner->getHandle(), $image->getHandle());
$bg_color = $corner->allocateColor(0, 0, 0);
$corner->fill(0, 0, $bg_color);
$fg_color = $corner->allocateColor(255, 255, 255);
$corner->getCanvas()->filledEllipse($radius * $sample_ratio, $radius * $sample_ratio, $radius * 2 * $sample_ratio, $radius * 2 * $sample_ratio, $fg_color);
$corner = $corner->resize($radius, $radius);
$result = $image->asTrueColor();
$tc = $result->getTransparentColor();
if ($tc == -1)
{
$tc = $result->allocateColorAlpha(255, 255, 255, 127);
imagecolortransparent($result->getHandle(), $tc);
$result->setTransparentColor($tc);
}
if ($corners & WideImage::SIDE_TOP_LEFT || $corners & WideImage::SIDE_LEFT || $corners & WideImage::SIDE_TOP)
$result = $result->applyMask($corner, -1, -1);
$corner = $corner->rotate(90);
if ($corners & WideImage::SIDE_TOP_RIGHT || $corners & WideImage::SIDE_TOP || $corners & WideImage::SIDE_RIGHT)
$result = $result->applyMask($corner, $result->getWidth() - $corner->getWidth() + 1, -1, 100);
$corner = $corner->rotate(90);
if ($corners & WideImage::SIDE_BOTTOM_RIGHT || $corners & WideImage::SIDE_RIGHT || $corners & WideImage::SIDE_BOTTOM)
$result = $result->applyMask($corner, $result->getWidth() - $corner->getWidth() + 1, $result->getHeight() - $corner->getHeight() + 1, 100);
$corner = $corner->rotate(90);
if ($corners & WideImage::SIDE_BOTTOM_LEFT || $corners & WideImage::SIDE_LEFT || $corners & WideImage::SIDE_BOTTOM)
$result = $result->applyMask($corner, -1, $result->getHeight() - $corner->getHeight() + 1, 100);
return $result;
}
else
{
$bg_color = $color;
$corner->fill(0, 0, $bg_color);
$fg_color = $corner->allocateColorAlpha(127, 127, 127, 127);
$corner->getCanvas()->filledEllipse($radius * $sample_ratio, $radius * $sample_ratio, $radius * 2 * $sample_ratio, $radius * 2 * $sample_ratio, $fg_color);
$corner = $corner->resize($radius, $radius);
$result = $image->copy();
if ($corners & WideImage::SIDE_TOP_LEFT || $corners & WideImage::SIDE_LEFT || $corners & WideImage::SIDE_TOP)
$result = $result->merge($corner, -1, -1, 100);
$corner = $corner->rotate(90);
if ($corners & WideImage::SIDE_TOP_RIGHT || $corners & WideImage::SIDE_TOP || $corners & WideImage::SIDE_RIGHT)
$result = $result->merge($corner, $result->getWidth() - $corner->getWidth() + 1, -1, 100);
$corner = $corner->rotate(90);
if ($corners & WideImage::SIDE_BOTTOM_RIGHT || $corners & WideImage::SIDE_RIGHT || $corners & WideImage::SIDE_BOTTOM)
$result = $result->merge($corner, $result->getWidth() - $corner->getWidth() + 1, $result->getHeight() - $corner->getHeight() + 1, 100);
$corner = $corner->rotate(90);
if ($corners & WideImage::SIDE_BOTTOM_LEFT || $corners & WideImage::SIDE_LEFT || $corners & WideImage::SIDE_BOTTOM)
$result = $result->merge($corner, -1, $result->getHeight() - $corner->getHeight() + 1, 100);
return $result;
}
}
}

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<?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 Internal/Operations
**/
/**
* Unsharp filter
*
* This filter was taken from http://vikjavev.no/computing/ump.php,
* the original author Torstein Hønsi. Adapted to fit better within
* the Wideimage package.
*
* @package Internal/Operations
*/
class WideImage_Operation_Unsharp {
/**
* Returns sharpened image
*
* @param WideImage_Image $image
* @param float $amount
* @param int $radius
* @param float $threshold
* @return WideImage_Image
*/
function execute($image, $amount, $radius, $threshold) {
// Attempt to calibrate the parameters to Photoshop:
if ($amount > 500) $amount = 500;
$amount = $amount * 0.016;
if ($radius > 50) $radius = 50;
$radius = $radius * 2;
if ($threshold > 255) $threshold = 255;
$radius = abs(round($radius)); // Only integers make sense.
if ($radius == 0) {
return $image;
}
// Gaussian blur matrix
$matrix = array(
array(1, 2, 1),
array(2, 4, 2),
array(1, 2, 1)
);
$blurred = $image->applyConvolution($matrix, 16, 0);
if($threshold > 0) {
// Calculate the difference between the blurred pixels and the original
// and set the pixels
for ($x = 0; $x < $image->getWidth(); $x++) {
for ($y = 0; $y < $image->getHeight(); $y++) {
$rgbOrig = $image->getRGBAt($x, $y);
$rOrig = $rgbOrig["red"];
$gOrig = $rgbOrig["green"];
$bOrig = $rgbOrig["blue"];
$rgbBlur = $blurred->getRGBAt($x, $y);
$rBlur = $rgbBlur["red"];
$gBlur = $rgbBlur["green"];
$bBlur = $rgbBlur["blue"];
// When the masked pixels differ less from the original
// than the threshold specifies, they are set to their original value.
$rNew = (abs($rOrig - $rBlur) >= $threshold)
? max(0, min(255, ($amount * ($rOrig - $rBlur)) + $rOrig))
: $rOrig;
$gNew = (abs($gOrig - $gBlur) >= $threshold)
? max(0, min(255, ($amount * ($gOrig - $gBlur)) + $gOrig))
: $gOrig;
$bNew = (abs($bOrig - $bBlur) >= $threshold)
? max(0, min(255, ($amount * ($bOrig - $bBlur)) + $bOrig))
: $bOrig;
$rgbNew = array("red" => $rNew, "green" => $gNew, "blue" => $bNew, "alpha" => 0);
if (($rOrig != $rNew) || ($gOrig != $gNew) || ($bOrig != $bNew)) {
$image->setRGBAt($x, $y, $rgbNew);
}
}
}
}
else {
$w = $image->getWidth();
$h = $image->getHeight();
for ($x = 0; $x < $w; $x++) {
for ($y = 0; $y < $h; $y++) {
$rgbOrig = $image->getRGBAt($x, $y);
$rOrig = $rgbOrig["red"];
$gOrig = $rgbOrig["green"];
$bOrig = $rgbOrig["blue"];
$rgbBlur = $blurred->getRGBAt($x, $y);
$rBlur = $rgbBlur["red"];
$gBlur = $rgbBlur["green"];
$bBlur = $rgbBlur["blue"];
$rNew = ($amount * ($rOrig - $rBlur)) + $rOrig;
if($rNew>255){$rNew=255;}
elseif($rNew<0){$rNew=0;}
$gNew = ($amount * ($gOrig - $gBlur)) + $gOrig;
if($gNew>255){$gNew=255;}
elseif($gNew<0){$gNew=0;}
$bNew = ($amount * ($bOrig - $bBlur)) + $bOrig;
if($bNew>255){$bNew=255;}
elseif($bNew<0){$bNew=0;}
$rgbNew = array("red" => $rNew, "green" => $gNew, "blue" => $bNew, "alpha" => 0);
$image->setRGBAt($x, $y, $rgbNew);
}
}
}
return $image;
}
}

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