/**
* 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 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;
}
/**
* 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);
}
/**
* 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;
}
