如何使用 PHP 在不丢失比例的情况下将图像放入框架中

Question

实际上，在这里用户可以上传任何尺寸的图像以适合我拥有的任何框架。我想在不丢失比例的情况下将该图像放入框架中。

例子：

This image is not fitting with my php code.

我的代码是

list($width, $height) = getimagesize($img1);
        $outputImage = imagecreatetruecolor($width, $height);

        // set background to white
        //$white = imagecolorallocate($outputImage, 255, 255, 255);
        //imagefill($outputImage, 0, 0, $white);
        list($width1, $height1) = getimagesize($img2);
        $info1 = getimagesize($img1);
        $info2 = getimagesize($img2);
        $extension1 = image_type_to_extension($info1[2]);
        $extension2 = image_type_to_extension($info2[2]);
        if($extension1=='.jpeg') {
        $first = imagecreatefromjpeg($img1);
        } else { 
        $first = imagecreatefrompng($img1);
        }
        if($extension2=='.jpeg') {
        $second = imagecreatefromjpeg($img2);
        } else { 
        $second = imagecreatefrompng($img2);
        }
        $ratio = $width1 / $height1;
        $targetWidth = 300 * $ratio;
        //echo $targetWidth;
        //imagecopyresized ( resource $dst_image , resource $src_image , int $dst_x , int $dst_y , int $src_x , int $src_y , int $dst_w , int $dst_h , int $src_w , int $src_h )
        imagecopyresampled($outputImage,$first,0,0,0,0, $width, $height, $width, $height);
        imagecopyresampled($outputImage,$second,110,75,0,0, $targetWidth, 300, $width1, $height1);

请帮助我。提前致谢。

Answer 1

要实现这一点，您必须检测帧图像和源图像尺寸 重新调整源图像的大小以适合帧图像尺寸。 请注意，为了避免比例问题，我们将检测源图像是宽图像还是高图像（风景或肖像） 如果 width > height 则将宽度设置为框架的宽度并根据主要比率计算新高度 如果高度 > 宽度 将高度设置为框架高度并计算新宽度 这是示例实现代码

<?
$src  = imagecreatefromjpeg('source.jpg');//source image path
$frame = imagecreatefrompng('frame.png');//frame image
$sourceWidth = imagesx($src); // source image width
$sourceHeight = imagesy($src); // image image height
$frameWidth = imagesx($frame);//get frame width
$frameHeight = imagesy($frame);//get frame height
$NewImage = imagecreatetruecolor($frameWidth,$frameHeight);//the new image
$bg_color = imagecolorallocate ($NewImage, 255, 255, 255);
imagefill($NewImage, 0, 0, $bg_color);//set background to white
if($sourceHeight >= $sourceWidth){
$newHeight=$frameHeight;// set height to frame height
$newWidth=intval($frameWidth*$sourceWidth/$sourceHeight);//calculate the new width  
imagecopyresampled($NewImage, $src, intval(($frameWidth-$newWidth)/2),0,0,0,$newWidth, $newHeight, $sourceWidth, $sourceHeight);//insert source image to new image at the center
} else {
$newWidth=$frameWidth;;// set width to frame width
$newHeight=intval($frameHeight*$sourceHeight/$sourceWidth);//calculate the new height 
imagecopyresampled($NewImage, $src,0,intval(($frameHeight-$newHeight)/2),0,0,$newWidth, $newHeight,$sourceWidth, $sourceHeight);//insert source image to new image at the center
}
imagecopyresampled($NewImage, $frame, 0,0, 0,0, $frameWidth, $frameHeight, $frameWidth, $frameHeight);//copy frame imageto new image 
header("Content-type: image/png");
imagejpeg($NewImage);
?>

希望这会有所帮助。