/**
* 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 $image->copy();
}
if ($bgColor === null) {
if ($image->isTransparent()) {
$bgColor = $image->getTransparentColor();
} else {
$tc = array('red' => 255, 'green' => 255, 'blue' => 255, 'alpha' => 127);
if ($image->isTrueColor()) {
$bgColor = $image->getExactColorAlpha($tc);
if ($bgColor == -1) {
$bgColor = $image->allocateColorAlpha($tc);
}
} else {
$bgColor = $image->getExactColor($tc);
if ($bgColor == -1) {
$bgColor = $image->allocateColor($tc);
}
}
}
}
return new WideImage_TrueColorImage(imagerotate($image->getHandle(), $angle, $bgColor, $ignoreTransparent));
}
/**
* Apply the manipulation with the setup options to the passed in image.
* This does not do any memory manipulation
*
* @param WideImage_Image $image
* @return WideImage_Image
*/
public function &apply(WideImage_Image &$image)
{
if (!$this->isSetup()) {
throw new RokGallery_Manipulation_Exception(rc__('ROKGALLERY_MANIPULATION_WAS_NOT_SETUP_PRIOR_TO_APPLYING'));
}
$return_image = $image->resize($this->width, $this->height);
return $return_image;
}
/**
* 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;
}
/**
* Executes imageconvolution() filter.
*
* @param WideImage_Image $image
* @param array $matrix
* @param numeric $div
* @param numeric $offset
*
* @return WideImage_Image
*/
public function execute($image, $matrix, $div, $offset)
{
$new = $image->asTrueColor();
if (!imageconvolution($new->getHandle(), $matrix, $div, $offset)) {
throw new WideImage_GDFunctionResultException('imageconvolution() returned false');
}
return $new;
}
/**
* Returns a mirrored image
*
* @param WideImage_Image $image
* @return WideImage_Image
*/
function execute($image)
{
$new = $image->copy();
$width = $image->getWidth();
$height = $image->getHeight();
for ($x = 0; $x < $width; $x++) {
imagecopy($new->getHandle(), $image->getHandle(), $x, 0, $width - $x - 1, 0, 1, $height);
}
return $new;
}
/**
* Returns a flipped image
*
* @param WideImage_Image $image
* @return WideImage_Image
*/
function execute($image)
{
$new = $image->copy();
$width = $image->getWidth();
$height = $image->getHeight();
for ($y = 0; $y < $height; $y++) {
imagecopy($new->getHandle(), $image->getHandle(), 0, $y, 0, $height - $y - 1, $width, 1);
}
return $new;
}
/**
* Rotates and mirrors and image properly based on current orientation value
*
* @param WideImage_Image $img
* @param int $orientation
* @return WideImage_Image
*/
function execute($img, $orientation)
{
switch ($orientation) {
case 2:
return $img->mirror();
break;
case 3:
return $img->rotate(180);
break;
case 4:
return $img->rotate(180)->mirror();
break;
case 5:
return $img->rotate(90)->mirror();
break;
case 6:
return $img->rotate(90);
break;
case 7:
return $img->rotate(-90)->mirror();
break;
case 8:
return $img->rotate(-90);
break;
default:
return $img->copy();
}
}
/**
* 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;
}
/**
* Apply the manipulation with the setup options to the passed in image.
* This does not do any memory manipulation
*
* @param WideImage_Image $image
* @return WideImage_Image
*/
public function &apply(WideImage_Image &$image)
{
if (!$this->isSetup()) {
throw new RokGallery_Manipulation_Exception(rc__('ROKGALLERY_MANIPULATION_WAS_NOT_SETUP_PRIOR_TO_APPLYING'));
}
if ($this->left == 0 && $this->top == 0 && $this->width == 0 && $this->height == 0) {
$this->width = $image->getWidth();
$this->height = $image->getHeight();
}
$return_image = $image->crop($this->left, $this->top, $this->width, $this->height);
return $return_image;
}
/**
* 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; $y++) {
imagecopy($new->getHandle(), $image->getHandle(), 0, $y, 0, $height - $y - 1, $width, 1);
}
return $new;
}
/**
* 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; $x++) {
imagecopy($new->getHandle(), $image->getHandle(), $x, 0, $width - $x - 1, 0, 1, $height);
}
return $new;
}
/**
* 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::$one_arg_filters)) {
imagefilter($new->getHandle(), $filter, $arg1);
} elseif (defined('IMG_FILTER_PIXELATE') && $filter == IMG_FILTER_PIXELATE) {
imagefilter($new->getHandle(), $filter, $arg1, $arg2);
} elseif ($filter == IMG_FILTER_COLORIZE) {
imagefilter($new->getHandle(), $filter, $arg1, $arg2, $arg3, $arg4);
} else {
imagefilter($new->getHandle(), $filter);
}
return $new;
}
/**
* Returns a flipped image.
*
* @param WideImage_Image $image
*
* @return WideImage_Image
*/
public function execute($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;
}
/**
* 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 $new;
}
public function rotate($angle, $bgColor = null, $ignoreTransparent = true)
{
if ((int) $angle !== 0) {
$this->image = $this->image->rotate($angle, $bgColor, $ignoreTransparent);
}
return $this;
}
/**
* Returns a greyscale copy of an image
*
* @param WideImage_Image $image
* @return WideImage_Image
*/
function execute($image)
{
$palette = $image instanceof WideImage_PaletteImage;
$transparent = $image->isTransparent();
if ($palette && $transparent) {
$tci = $image->getTransparentColor();
}
$new = $image->asTrueColor();
imagefilter($new->getHandle(), IMG_FILTER_GRAYSCALE);
if ($palette) {
$new = $new->asPalette();
if ($transparent) {
$new->setTransparentColor($tci);
}
}
return $new;
}
/**
* 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;
}
/**
* 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 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));
}
/**
* 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) {
imagecopymerge($result->getHandle(), $overlay->getHandle(), $x, $y, 0, 0, $overlay->getWidth(), $overlay->getHeight(), $pct);
} else {
imagecopy($result->getHandle(), $overlay->getHandle(), $x, $y, 0, 0, $overlay->getWidth(), $overlay->getHeight());
}
return $result;
}
/**
* 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;
}
/**
* 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;
}
/**
* 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;
}
/**
* Returns a merged image.
*
* @param WideImage_Image $base
* @param WideImage_Image $overlay
* @param smart_coordinate $left
* @param smart_coordinate $top
* @param numeric $pct
*
* @return WideImage_Image
*/
public function execute($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;
}
/**
* 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)
{
$left = WideImage_Coordinate::fix($image->getWidth(), $left);
$top = WideImage_Coordinate::fix($image->getHeight(), $top);
$width = $image->getWidth();
if ($width > $mask->getWidth()) {
$width = $mask->getWidth();
}
$height = $image->getHeight();
if ($height > $mask->getHeight()) {
$height = $mask->getHeight();
}
$result = $image->asTrueColor();
$result->alphaBlending(false);
$result->saveAlpha(true);
$srcTransparentColor = $image->getTransparentColor();
if ($srcTransparentColor >= 0) {
$trgb = $image->getColorRGB($srcTransparentColor);
$trgb['alpha'] = 127;
$destTransparentColor = $result->allocateColorAlpha($trgb);
$result->setTransparentColor($destTransparentColor);
} else {
$destTransparentColor = $result->allocateColorAlpha(255, 255, 255, 127);
}
for ($x = 0; $x < $width; $x++) {
for ($y = 0; $y < $height; $y++) {
if ($left + $x < $image->getWidth() && $top + $y < $image->getHeight()) {
$srcColor = $image->getColorAt($left + $x, $top + $y);
if ($srcColor == $srcTransparentColor) {
$destColor = $destTransparentColor;
} else {
$maskRGB = $mask->getRGBAt($x, $y);
if ($maskRGB['red'] == 0) {
$destColor = $destTransparentColor;
} elseif ($srcColor >= 0) {
$imageRGB = $image->getRGBAt($left + $x, $top + $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;
}
}
$result->setColorAt($left + $x, $top + $y, $destColor);
}
}
}
return $result;
}
/**
* 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;
}
/**
* 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;
}
/**
* Writes text onto an image.
*
* @param WideImage_Image $image
* @param mixed $x smart coordinate
* @param mixed $y smart coordinate
* @param string $text
* @param int $angle Angle in degrees clockwise
*/
public function writeText($image, $x, $y, $text, $angle = 0)
{
if ($image->isTrueColor()) {
$image->alphaBlending(true);
}
$box = imageftbbox($this->size, $angle, $this->face, $text);
$obox = ['left' => min($box[0], $box[2], $box[4], $box[6]), 'top' => min($box[1], $box[3], $box[5], $box[7]), 'right' => max($box[0], $box[2], $box[4], $box[6]) - 1, 'bottom' => max($box[1], $box[3], $box[5], $box[7]) - 1];
$obox['width'] = abs($obox['left']) + abs($obox['right']);
$obox['height'] = abs($obox['top']) + abs($obox['bottom']);
$x = WideImage_Coordinate::fix($x, $image->getWidth(), $obox['width']);
$y = WideImage_Coordinate::fix($y, $image->getHeight(), $obox['height']);
$fixed_x = $x - $obox['left'];
$fixed_y = $y - $obox['top'];
imagettftext($image->getHandle(), $this->size, $angle, $fixed_x, $fixed_y, $this->color, $this->face, $text);
}
/**
* 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;
}
/**
* Fix a coordinate for a resize (limits by image weight and height)
*
* @param WideImage_Image $img
* @param int $width Width of the image
* @param int $height Height of the image
* @return array An array(width, height), fixed for resizing
*/
static function fixForResize($img, $width, $height)
{
if ($width === null && $height === null) {
return array($img->getWidth(), $img->getHeight());
}
if ($width !== null) {
$width = self::fix($width, $img->getWidth());
}
if ($height !== null) {
$height = self::fix($height, $img->getHeight());
}
if ($width === null) {
$width = floor($img->getWidth() * $height / $img->getHeight());
}
if ($height === null) {
$height = floor($img->getHeight() * $width / $img->getWidth());
}
return array($width, $height);
}
