how to use imagecopyresampled correctly

[figo2476]

I have an image and I want to crop portion of the original image.

 

imagecopyresampled ( 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 )

 

I pass the cropped image size & original image size to the function. The end result is that a smaller image with black spacing around the bottom and right side. Then the original image (it resize itself ugly) to the rest of the area.

 

But if the dst and src are in the same width and height, the end result has no problem. Any hint?

[Paperstyle]

Are the dimensions of source and destination in the same proportions? By that I mean if you divide source_x by source_y and dest_x by dest_y do you get the same result?

[figo2476]

From my understanding, src_w & src_h are the original width and height. dest_x & dest_y are the dimension I want them to be.

 

"same proportions": em.. users can clip portion from the original image. (The clip functionality I provided). So  it is not in same proportions.

 

The end result is users clip the image and it should return that part in original quality.

[tippy_102]

Hard to say without seeing your entire code, but here's what I use:

<?php

// creates a copy of a selected chunk of image.jpg

$filename= "image.jpg";
list($w, $h, $type, $attr) = getimagesize($filename);
$src_im = imagecreatefromjpeg($filename);

$src_x = '0';   // begin x
$src_y = '0';   // begin y
$src_w = '100'; // width
$src_h = '100'; // height
$dst_x = '0';   // destination x
$dst_y = '0';   // destination y

$dst_im = imagecreatetruecolor($src_w, $src_h);
$white = imagecolorallocate($dst_im, 255, 255, 255);
imagefill($dst_im, 0, 0, $white);

imagecopy($dst_im, $src_im, $dst_x, $dst_y, $src_x, $src_y, $src_w, $src_h);

header("Content-type: image/png");
imagepng($dst_im);
imagedestroy($dst_im);
?>