change particular area of an image and fill color in that area

Question

Edit Png Image For E.g change particular area and fill color in that area.

I want to change the color of an image only selected area. Like the first user selects a

Answer 1

Just copy and paste this function in custom helper file or your class. You just need to set parameter for proper image resolution result.

  function resize($source_image, $destination, $tn_w, $tn_h, $quality = 100, $wmsource = false) {
        $info = getimagesize($source_image);
        $imgtype = image_type_to_mime_type($info[2]);

        #assuming the mime type is correct
        switch ($imgtype) {
            case 'image/jpeg':
            $source = imagecreatefromjpeg($source_image);
            break;
            case 'image/jpg':
            $source = imagecreatefromjpeg($source_image);
            break;
            case 'image/gif':
            $source = imagecreatefromgif($source_image);
            break;
            case 'image/png':
            $source = imagecreatefrompng($source_image);
            break;
            default:
            die('Invalid image type.');
        }
        #Figure out the dimensions of the image and the dimensions of the desired thumbnail
        $src_w = imagesx($source);
        $src_h = imagesy($source);


        #Do some math to figure out which way we'll need to crop the image
        #to get it proportional to the new size, then crop or adjust as needed

        $x_ratio = $tn_w / $src_w;
        $y_ratio = $tn_h / $src_h;

        if (($src_w <= $tn_w) && ($src_h <= $tn_h)) {
            $new_w = $src_w;
            $new_h = $src_h;         
        } elseif (($x_ratio * $src_h) < $tn_h) {
            $new_h = ceil($x_ratio * $src_h);
            $new_w = $tn_w;
        } else {
            $new_w = ceil($y_ratio * $src_w);
            $new_h = $tn_h;
        }

        $newpic = imagecreatetruecolor(round($new_w), round($new_h));
        imagecopyresampled($newpic, $source, 0, 0, 0, 0, $new_w, $new_h, $src_w, $src_h);
        $final = imagecreatetruecolor($tn_w, $tn_h);
        $backgroundColor = imagecolorallocate($final, 248,248,248);
        imagefill($final, 0, 0, $backgroundColor);
        //imagecopyresampled($final, $newpic, 0, 0, ($x_mid - ($tn_w / 2)), ($y_mid - ($tn_h / 2)), $tn_w, $tn_h, $tn_w, $tn_h);
        imagecopy($final, $newpic, (($tn_w - $new_w)/ 2), (($tn_h - $new_h) / 2), 0, 0, $new_w, $new_h);
        

        #if we need to add a watermark
        if ($wmsource) {
            #find out what type of image the watermark is
            $info    = getimagesize($wmsource);
            $imgtype = image_type_to_mime_type($info[2]);

            #assuming the mime type is correct
            switch ($imgtype) {
                case 'image/jpeg':
                $watermark = imagecreatefromjpeg($wmsource);
                break;
                case 'image/gif':
                $watermark = imagecreatefromgif($wmsource);
                break;
                case 'image/png':
                $watermark = imagecreatefrompng($wmsource);
                break;
                default:
                die('Invalid watermark type.');
            }

            #if we're adding a watermark, figure out the size of the watermark
            #and then place the watermark image on the bottom right of the image
            $wm_w = imagesx($watermark);
            $wm_h = imagesy($watermark);
            imagecopy($final, $watermark, $tn_w - $wm_w, $tn_h - $wm_h, 0, 0, $tn_w, $tn_h);

        }
        if (imagejpeg($final, $destination, $quality)) {
            return true;
        }
        return false;
    }