/**
* @param Image $image
*
* @return Image
*/
public function apply($image)
{
for ($i = 0; $i < $this->amount; $i++) {
imagefilter($image->getCore(), IMG_FILTER_GAUSSIAN_BLUR);
}
return $image;
}
/**
* @param Image $image
*
* @return Image
*/
public function draw($image)
{
list($x1, $y1) = $this->point1;
list($x2, $y2) = $this->point2;
list($r, $g, $b) = $this->color->getRgb();
$color = imagecolorallocate($image->getCore(), $r, $g, $b);
if (function_exists('imageantialias')) {
// Not available on some if PHP is not precompiled with it even if GD is enabled
imageantialias($image->getCore(), true);
}
imageline($image->getCore(), $x1, $y1, $x2, $y2, $color);
return $image;
}
/**
* @param Image $image
*
* @return Image
*/
public function apply($image)
{
$amount = $this->amount;
// build matrix
$min = $amount >= 10 ? $amount * -0.01 : 0;
$max = $amount * -0.025;
$abs = (4 * $min + 4 * $max) * -1 + 1;
$div = 1;
$matrix = array(array($min, $max, $min), array($max, $abs, $max), array($min, $max, $min));
// apply the matrix
imageconvolution($image->getCore(), $matrix, $div, 0);
return $image;
}
/**
* Crop based on entropy.
*
* @param Image $oldImage
* @param $cropW
* @param $cropH
*
* @return array
*/
private function _smartCrop($oldImage, $cropW, $cropH)
{
$image = clone $oldImage;
$this->resizeFit($image, 30, 30);
$origW = $oldImage->getWidth();
$origH = $oldImage->getHeight();
$resizeW = $image->getWidth();
$resizeH = $image->getHeight();
$smallCropW = round($resizeW / $origW * $cropW);
$smallCropH = round($resizeH / $origH * $cropH);
$step = 1;
for ($y = 0; $y < $resizeH - $smallCropH; $y += $step) {
for ($x = 0; $x < $resizeW - $smallCropW; $x += $step) {
$hist[$x . '-' . $y] = $this->_entropy($image->histogram(array(array($x, $y), array($smallCropW, $smallCropH))));
}
if ($resizeW - $smallCropW <= 0) {
$hist['0-' . $y] = $this->_entropy($image->histogram(array(array(0, 0), array($smallCropW, $smallCropH))));
}
}
if ($resizeH - $smallCropH <= 0) {
$hist['0-0'] = $this->_entropy($image->histogram(array(array(0, 0), array($smallCropW, $smallCropH))));
}
asort($hist);
end($hist);
$pos = key($hist);
// last key
list($x, $y) = explode('-', $pos);
$x = round($x * ($origW / $resizeW));
$y = round($y * ($origH / $resizeH));
return array($x, $y);
}
/**
* @param Image $image
*
* @return Image
*/
public function apply($image)
{
imagefilter($image->getCore(), IMG_FILTER_BRIGHTNESS, $this->amount * 2.55);
return $image;
}
/**
* Create a blank image.
*
* @param int $width Width of image in pixels.
* @param int $height Height of image in pixels.
*
* @return ImageInterface
* @throws \Exception
*/
public static function createBlankImage($width = 1, $height = 1)
{
$editorName = self::detectAvailableEditor();
if ('Imagick' === $editorName) {
return ImagickImage::createBlank($width, $height);
} else {
return GdImage::createBlank($width, $height);
}
}
/**
* @param Image $image
*
* @return Image
*/
public function apply($image)
{
imagefilter($image->getCore(), IMG_FILTER_GRAYSCALE);
return $image;
}
/**
* @param Image $image
*
* @return Image
*/
public function apply($image)
{
imagefilter($image->getCore(), IMG_FILTER_COLORIZE, $this->red, $this->green, $this->blue);
return $image;
}
/**
* @param Image $image
*
* @return Image
*/
public function apply($image)
{
imagefilter($image->getCore(), IMG_FILTER_PIXELATE, $this->amount, true);
return $image;
}
/**
* Dither by applying a threshold map.
*
* @param Image $image
*
* @return Image
*/
private function ordered($image)
{
// Localize vars
$width = $image->getWidth();
$height = $image->getHeight();
$old = $image->getCore();
$new = imagecreatetruecolor($width, $height);
$thresholdMap = array(array(15, 135, 45, 165), array(195, 75, 225, 105), array(60, 180, 30, 150), array(240, 120, 210, 90));
for ($y = 0; $y < $height; $y += 1) {
for ($x = 0; $x < $width; $x += 1) {
$color = imagecolorat($old, $x, $y);
$r = $color >> 16 & 0xff;
$g = $color >> 8 & 0xff;
$b = $color & 0xff;
$gray = round($r * 0.3 + $g * 0.59 + $b * 0.11);
$threshold = $thresholdMap[$x % 4][$y % 4];
$oldPixel = ($gray + $threshold) / 2;
if ($oldPixel <= 127) {
// Determine if black or white. Also has the benefit of clipping excess value
$newPixel = 0;
} else {
$newPixel = 255;
}
// Current pixel
imagesetpixel($new, $x, $y, imagecolorallocate($new, $newPixel, $newPixel, $newPixel));
}
}
imagedestroy($old);
// Free resource
// Create new image with updated core
return new Image($new, $image->getImageFile(), $width, $height, $image->getType());
}
/**
* @param Image $image
*
* @return Image
*/
public function apply($image)
{
// Localize vars
$width = $image->getWidth();
$height = $image->getHeight();
$old = $image->getCore();
$pixels = array();
$new = imagecreatetruecolor($width, $height);
for ($y = 0; $y < $height; $y++) {
for ($x = 0; $x < $width; $x++) {
// row 0
if ($x > 0 and $y > 0) {
$matrix[0][0] = $this->getColor($old, $pixels, $x - 1, $y - 1);
} else {
$matrix[0][0] = $this->getColor($old, $pixels, $x, $y);
}
if ($y > 0) {
$matrix[1][0] = $this->getColor($old, $pixels, $x, $y - 1);
} else {
$matrix[1][0] = $this->getColor($old, $pixels, $x, $y);
}
if ($x + 1 < $width and $y > 0) {
$matrix[2][0] = $this->getColor($old, $pixels, $x + 1, $y - 1);
} else {
$matrix[2][0] = $this->getColor($old, $pixels, $x, $y);
}
// row 1
if ($x > 0) {
$matrix[0][1] = $this->getColor($old, $pixels, $x - 1, $y);
} else {
$matrix[0][1] = $this->getColor($old, $pixels, $x, $y);
}
if ($x + 1 < $width) {
$matrix[2][1] = $this->getColor($old, $pixels, $x + 1, $y);
} else {
$matrix[2][1] = $this->getColor($old, $pixels, $x, $y);
}
// row 1
if ($x > 0 and $y + 1 < $height) {
$matrix[0][2] = $this->getColor($old, $pixels, $x - 1, $y + 1);
} else {
$matrix[0][2] = $this->getColor($old, $pixels, $x, $y);
}
if ($y + 1 < $height) {
$matrix[1][2] = $this->getColor($old, $pixels, $x, $y + 1);
} else {
$matrix[1][2] = $this->getColor($old, $pixels, $x, $y);
}
if ($x + 1 < $width and $y + 1 < $height) {
$matrix[2][2] = $this->getColor($old, $pixels, $x + 1, $y + 1);
} else {
$matrix[2][2] = $this->getColor($old, $pixels, $x, $y);
}
$edge = $this->convolve($matrix);
$edge = intval($edge / 2);
if ($edge > 255) {
$edge = 255;
}
$color = imagecolorallocate($new, $edge, $edge, $edge);
imagesetpixel($new, $x, $y, $color);
}
}
imagedestroy($old);
// Free resource
// Create and return new image with updated core
return new Image($new, $image->getImageFile(), $width, $height, $image->getType());
}
/**
* @param Image $image
*
* @return Image
*/
public function apply($image)
{
imagefilter($image->getCore(), IMG_FILTER_CONTRAST, $this->amount * -1);
return $image;
}
/**
* @param Image $image
*
* @return Image
*/
public function apply($image)
{
imagegammacorrect($image->getCore(), 1, $this->amount);
return $image;
}