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Update SimpleImage.php #1

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57 changes: 53 additions & 4 deletions src/claviska/SimpleImage.php
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Original file line number Diff line number Diff line change
Expand Up @@ -537,27 +537,76 @@ public function bestFit($maxWidth, $maxHeight) {
return $this->resize($width, $height);
}

/*
* image crop position
*/
function cropAlign($image, $cropWidth, $cropHeight, $horizontalAlign = 'center', $verticalAlign = 'middle') {
$width = imagesx($image);
$height = imagesy($image);

$horizontalAlignPixels = calculatePixelsForAlign($width, $cropWidth, $horizontalAlign);
$verticalAlignPixels = calculatePixelsForAlign($height, $cropHeight, $verticalAlign);
return imageCrop($image, [
'x' => $horizontalAlignPixels[0],
'y' => $verticalAlignPixels[0],
'width' => $horizontalAlignPixels[1],
'height' => $verticalAlignPixels[1]
]);

}

function calculatePixelsForAlign($imageSize, $cropSize, $align) {
switch ($align) {
case 'left':
case 'top':
return [0, min($cropSize, $imageSize)];
case 'right':
case 'bottom':
return [max(0, $imageSize - $cropSize), min($cropSize, $imageSize)];
case 'center':
case 'middle':
return [
max(0, floor(($imageSize / 2) - ($cropSize / 2))),
min($cropSize, $imageSize),
];
default: return [0, $imageSize];
}
}






//
// Crop the image.
//
// $x1 - Top left x coordinate.
// $y1 - Top left y coordinate.
// $x2 - Bottom right x coordinate.
// $y2 - Bottom right x coordinate.
//
// $H_align - horizontal align
// $V_align - vertical align
// Returns a SimpleImage object.
//
public function crop($x1, $y1, $x2, $y2) {
public function crop($x1, $y1, $x2, $y2, $H_align="center" , $V_align="middle") {
// Keep crop within image dimensions
$x1 = self::keepWithin($x1, 0, $this->getWidth());
$x2 = self::keepWithin($x2, 0, $this->getWidth());
$y1 = self::keepWithin($y1, 0, $this->getHeight());
$y2 = self::keepWithin($y2, 0, $this->getHeight());

// crop position
$img_crop_coordinates = $this->cropAlign($this->image, $crop_width, $crop_height, $H_align, $V_align);

// First coordinates
$x1 = $img_crop_coordinates['x'];
$y1 = $img_crop_coordinates['y'];

// Crop it
$this->image = imagecrop($this->image, [
'x' => min($x1, $x2),
'y' => min($y1, $y2),
'x' => $x1,
'y' => $y1,
'width' => abs($x2 - $x1),
'height' => abs($y2 - $y1)
]);
Expand Down