Resize Image Gist

gistfile1.txt

    function resize($image, $width, $height, $mod,$waterMarkImage =false)
    {
        if ( ! file_exists($image)) exit;
        $imageModified = @filemtime($image);
        $image_properties = getimagesize($image);
        if ( ! $image_properties) {
            return false;
        }
        //---------------------------------------------
        $image_width = $image_properties[0];
        $image_height = $image_properties[1];
        $image_ratio = $image_width / $image_height;
        $image_type = $image_properties["mime"];
        //---------------------------------------------
        if ( ! $width && ! $height) {
            $width = $image_width;
            $height = $image_height;
        }
        if ( ! $width && $height) {
            $width = round($height * $image_ratio);
        }
        if ( ! $height && $width) {
            $height = round($width / $image_ratio);
        }
        if ($image_type == "image/jpeg") {
            $thumb = imagecreatefromjpeg($image);
        } else if ($image_type == "image/png") {
            $thumb = imagecreatefrompng($image);
        } else if ($image_type == "image/gif") {
            $thumb = imagecreatefromgif($image);
        } else {
            return false;
        }
        //---------------------------------------------
        if ($mod == 1) {
            if ($width <= $image_width && $height > $image_height) {
                $img_new_width = $width;
                $img_new_height = round($img_new_width / $image_ratio);
                $canvas_width = $img_new_width;
                $canvas_height = $img_new_height;
            } else if ($height <= $image_height && $width > $image_width) {
                $img_new_height = $height;
                $img_new_width = round($img_new_height * $image_ratio);
                $canvas_width = $img_new_height;
                $canvas_height = $img_new_height;
            } else {
                $w_r = $image_width / $width;
                $h_r = $image_height / $height;
                if ($w_r <= $h_r) {
                    $img_new_height = $height;
                    $img_new_width = round($img_new_height * $image_ratio);
                } else {
                    $img_new_width = $width;
                    $img_new_height = round($img_new_width / $image_ratio);
                }
                $canvas_width = $img_new_width;
                $canvas_height = $img_new_height;
            }
        } else if ($mod == 2) {
            if ($width <= $image_width && $height > $image_height) {
                $img_new_height = $height;
                $img_new_width = round($img_new_height * $image_ratio);
                $canvas_width = $width;
                $canvas_height = $img_new_height;
            } else if ($height <= $image_height && $width > $image_width) {
                $img_new_width = $width;
                $img_new_height = round($img_new_width / $image_ratio);
                $canvas_width = $img_new_width;
                $canvas_height = $height;
            } else {
                $w_r = $image_width / $width;
                $h_r = $image_height / $height;
                if ($w_r <= $h_r) {
                    $img_new_width = $width;
                    $img_new_height = round($img_new_width / $image_ratio);
                    $canvas_width = $img_new_width;
                    $canvas_height = $height;
                } else {
                    $img_new_height = $height;
                    $img_new_width = round($img_new_height * $image_ratio);
                    $canvas_width = $width;
                    $canvas_height = $img_new_height;
                }
            }
        } else if ($mod == 3) {
            $img_new_width = $width;
            $img_new_height = $height;
            $canvas_width = $width;
            $canvas_height = $height;
        } else if ($mod == 4) {
            if ($width <= $image_width || $height <= $image_height) {
                $w_r = $image_width / $width;
                $h_r = $image_height / $height;
                if ($w_r >= 1 && $h_r >= 1) {
                    if ($w_r > $h_r) {
                        $img_new_width = $width;
                        $img_new_height = round($img_new_width / $image_ratio);
                    } else {
                        $img_new_height = $height;
                        $img_new_width = round($img_new_height * $image_ratio);
                    }
                } else if ($w_r >= 1) {
                    $img_new_width = $width;
                    $img_new_height = round($img_new_width / $image_ratio);
                } else if ($h_r >= 1) {
                    $img_new_height = $height;
                    $img_new_width = round($img_new_height * $image_ratio);
                }
                $canvas_width = $img_new_width;
                $canvas_height = $img_new_height;
            } else {
                $img_new_width = $image_width;
                $img_new_height = $image_height;
                $canvas_width = $image_width;
                $canvas_height = $image_height;
            }
        } else {
            return false;
        }
        $canvas = imagecreatetruecolor($canvas_width, $canvas_height);
        if ($img_new_width < $canvas_width) {
            $pos_x1 = 0;
            $pos_x2 = round(($img_new_width - $canvas_width) / 2);
        } else {
            $pos_x1 = round(($canvas_width - $img_new_width) / 2);
            $pos_x2 = 0;
        }
        if ($img_new_height < $canvas_height) {
            $pos_y1 = 0;
            $pos_y2 = round(($img_new_height - $canvas_height) / 2);
        } else {
            $pos_y1 = round(($canvas_height - $img_new_height) / 2);
            $pos_y2 = 0;
        }
        imagecopyresampled($canvas, $thumb, $pos_x1, $pos_y1, $pos_x2, $pos_y2, $img_new_width, $img_new_height, $image_width, $image_height);
        if($waterMarkImage)
        {
            $overlay_gd_image = imagecreatefrompng( $waterMarkImage );
            $overlay_width = imagesx( $overlay_gd_image ) ;
            $overlay_height = imagesy( $overlay_gd_image ) ;
            $diffAspect = round(($img_new_width) / $overlay_width);
            $img_paste_x = 0;
            while($img_paste_x < $img_new_width){
                $img_paste_y = 0;
                while($img_paste_y < $img_new_height){
                    imagecopy($canvas, $overlay_gd_image, $img_paste_x, $img_paste_y, 0, 0, $overlay_width, $overlay_height);
                    $img_paste_y += $overlay_height;
                }
                $img_paste_x += $overlay_width;
            }
        }
        ob_clean();
        header("Content-type: image/jpeg");
        header("Pragma: public");
        header("Cache-Control: public");
        header("Last-Modified: ".gmdate("D, d M Y H:i:s",$imageModified)." GMT");
        header('Content-type: image/jpeg');
        imagejpeg($canvas, NULL, 90); // kalite %80
        imagedestroy($canvas);
        imagedestroy($thumb);
        exit();
    }