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<?php |
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/** |
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* @package Application Utils |
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* @subpackage ImageHelper |
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* @see \AppUtils\ImageHelper\ImageTrimmer |
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*/ |
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declare(strict_types=1); |
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namespace AppUtils\ImageHelper; |
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use AppUtils\ImageHelper; |
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use AppUtils\ImageHelper_Exception; |
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use AppUtils\RGBAColor; |
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use AppUtils\RGBAColor\ColorFactory; |
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use GdImage; |
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/** |
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* Specialized class used for trimming images. |
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* |
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* @package Application Utils |
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* @subpackage ImageHelper |
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* @author Sebastian Mordziol <[email protected]> |
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*/ |
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class ImageTrimmer |
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{ |
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/** |
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* @var resource|GdImage |
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*/ |
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private $sourceImage; |
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private RGBAColor $trimColor; |
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private ImageHelper $helper; |
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/** |
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* @param ImageHelper $helper |
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* @param resource|GdImage $sourceImage |
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* @param RGBAColor|null $trimColor |
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* @throws ImageHelper_Exception |
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*/ |
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public function __construct(ImageHelper $helper, $sourceImage, ?RGBAColor $trimColor=null) |
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{ |
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ImageHelper::requireResource($sourceImage); |
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$this->helper = $helper; |
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$this->sourceImage = $sourceImage; |
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$this->trimColor = $this->detectTrimColor($trimColor); |
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} |
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private function detectTrimColor(?RGBAColor $trimColor) : RGBAColor |
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{ |
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$targetColor = ColorFactory::createAuto($trimColor); |
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if($targetColor !== null) |
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{ |
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return $targetColor; |
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} |
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return $this->helper->getIndexedColors( |
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$this->sourceImage, |
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(int)imagecolorat($this->sourceImage, 0, 0) |
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); |
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} |
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/** |
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* @return resource|GdImage|null |
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*/ |
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public function trim_new() |
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{ |
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$img = imagecropauto( |
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$this->sourceImage, |
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IMG_CROP_THRESHOLD, |
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0.1, // Does not work at all with 0.0 |
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imagecolorclosestalpha( |
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$this->sourceImage, |
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$this->trimColor->getRed()->get8Bit(), |
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$this->trimColor->getGreen()->get8Bit(), |
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$this->trimColor->getBlue()->get8Bit(), |
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$this->trimColor->getAlpha()->get7Bit() |
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) |
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); |
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if($img !== false) { |
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return $img; |
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} |
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return null; |
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} |
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public function trim() |
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{ |
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// Get the image width and height. |
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$imw = imagesx($this->sourceImage); |
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$imh = imagesy($this->sourceImage); |
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// Set the X variables. |
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$xmin = $imw; |
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$xmax = 0; |
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$ymin = null; |
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$ymax = null; |
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// Start scanning for the edges. |
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for ($iy=0; $iy<$imh; $iy++) |
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{ |
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$first = true; |
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for ($ix=0; $ix<$imw; $ix++) |
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{ |
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$ndx = imagecolorat($this->sourceImage, $ix, $iy); |
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$colors = $this->helper->getIndexedColors($this->sourceImage, $ndx); |
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if(!$colors->matchesAlpha($this->trimColor)) |
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{ |
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if ($xmin > $ix) { $xmin = $ix; } |
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if ($xmax < $ix) { $xmax = $ix; } |
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if (!isset($ymin)) { $ymin = $iy; } |
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$ymax = $iy; |
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if($first) |
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{ |
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$ix = $xmax; |
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$first = false; |
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} |
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} |
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} |
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} |
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// no trimming border found |
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if($ymax === null) { |
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return $this->sourceImage; |
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} |
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// The new width and height of the image. |
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$imw = 1+$xmax-$xmin; // Image width in pixels |
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$imh = 1+$ymax-$ymin; // Image height in pixels |
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// Make another image to place the trimmed version in. |
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$im2 = $this->helper->createNewImage($imw, $imh); |
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if($this->trimColor->hasTransparency()) |
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{ |
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$bg2 = imagecolorallocatealpha( |
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$im2, |
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$this->trimColor->getRed()->get8Bit(), |
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$this->trimColor->getGreen()->get8Bit(), |
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$this->trimColor->getBlue()->get8Bit(), |
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$this->trimColor->getAlpha()->get7Bit() |
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); |
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imagecolortransparent($im2, $bg2); |
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} |
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else |
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{ |
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$bg2 = imagecolorallocate( |
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$im2, |
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$this->trimColor->getRed()->get8Bit(), |
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$this->trimColor->getGreen()->get8Bit(), |
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$this->trimColor->getBlue()->get8Bit() |
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); |
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} |
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// Make the background of the new image the same as the background of the old one. |
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imagefill($im2, 0, 0, $bg2); |
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// Copy it over to the new image. |
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imagecopy($im2, $this->sourceImage, 0, 0, $xmin, $ymin, $imw, $imh); |
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return $im2; |
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} |
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} |
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Mistralys /
application-utils
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