Get image file path.
| public getImageFile ( ) : string | ||
| return | string | File path to 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());
}
/**
* Resize helper function.
*
* @param Image $image
* @param int $newWidth
* @param int $newHeight
* @param int $targetX
* @param int $targetY
* @param int $srcX
* @param int $srcY
*
*/
private function _resize(&$image, $newWidth, $newHeight, $targetX = 0, $targetY = 0, $srcX = 0, $srcY = 0)
{
// $this->_imageCheck();
if ($image->isAnimated()) {
// Animated GIF
$gift = new GifHelper();
$blocks = $gift->resize($image->getBlocks(), $newWidth, $newHeight);
// Resize image instance
$image = new Image($image->getCore(), $image->getImageFile(), $newWidth, $newHeight, $image->getType(), $blocks, true);
} else {
// Create blank image
$newImage = Image::createBlank($newWidth, $newHeight);
if (ImageType::PNG === $image->getType()) {
// Preserve PNG transparency
$newImage->fullAlphaMode(true);
}
imagecopyresampled($newImage->getCore(), $image->getCore(), $targetX, $targetY, $srcX, $srcY, $newWidth, $newHeight, $image->getWidth(), $image->getHeight());
// Free memory of old resource
imagedestroy($image->getCore());
// Resize image instance
$image = new Image($newImage->getCore(), $image->getImageFile(), $newWidth, $newHeight, $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());
}