GD Canvas color

[graham23s]

Hi Guys,

 

in my thumbnail function i wanted the canvas background color to be white, by default it's black and throws my site out of whack, can anyone show me how to change it all?

 

<?php
function resize_image($upload_directory, $new_image_name)
{
  // original image location //
  $original_image = $upload_directory;
  
  // set up a canvas sizes //
  $canvas_width = 65;
  $canvas_height = 65;
  
  // create the canvas //
  $canvas = imagecreatetruecolor($canvas_width, $canvas_height);
  
  // get the image height and width //
  list($image_width, $image_height) = getimagesize($upload_directory);
  
  // RATIO CALCULATION //
  $ratio = $image_width / $image_height;
  
    if ($ratio > 1 )
    {
  
  	$new_image_width = 65;
	$new_image_height = 65 / $ratio;
  
     } else {
   
   	$new_image_width = (float) 65 * $ratio;
	$new_image_height = 65;
   
  }
  
  // store original into memory //
  $original_image = imagecreatefromjpeg($original_image);
  
  // copy the original image onto the canvas canvas, original and top/left co-ordinates //
  imagecopyresampled($canvas, $original_image, 0,0,0,0, $new_image_width, $new_image_height, $image_width, $image_height);
  
  // thumbnail name //
  $new_thumbnail_name = "thumb-$new_image_name";
  
  // save the thumbnail in the thumbs folder //
  if(imagejpeg($canvas, "products/thumbnails/$new_thumbnail_name", 100))
  {
   return("$new_thumbnail_name");
  }
  
  // destroy the images in memory //
  imagedestroy($original_image);
  imagedestroy($canvas);  
  
}
?>

 

Thanks for any help guys

 

Graham

[Barand]

After creating the image, imagefill() with white.

[graham23s]

Hi Barry,

 

i looked up the dunction and did:

 

<?php
function resize_image($upload_directory, $new_image_name)
{
  // original image location //
  $original_image = $upload_directory;
  
  // set up a canvas sizes //
  $canvas_width = 65;
  $canvas_height = 65;
  
  // create the canvas //
  $canvas = imagecreatetruecolor($canvas_width, $canvas_height);
  
  // make the background color white //
  $white_background = imagecolorallocate($im, 255, 0, 0);
  
  $handle = imagefill($canvas, 0, 0, $red);
  
  // get the image height and width //
  list($image_width, $image_height) = getimagesize($upload_directory);
  
  // RATIO CALCULATIONS //
  $ratio = $image_width / $image_height;
  
    if ($ratio > 1 )
    {
  
  	$new_image_width = 65;
	$new_image_height = 65 / $ratio;
  
     } else {
   
   	$new_image_width = (float) 65 * $ratio;
	$new_image_height = 65;
   
  }
  
  // store original into memory //
  $original_image = imagecreatefromjpeg($original_image);
  
  // copy the original image onto the canvas canvas, original and top/left co-ordinates //
  imagecopyresampled($handle, $original_image, 0,0,0,0, $new_image_width, $new_image_height, $image_width, $image_height);
  
  // thumbnail name //
  $new_thumbnail_name = "thumb-$new_image_name";
  
  // save the thumbnail in the thumbs folder //
  if(imagejpeg($canvas, "products/thumbnails/$new_thumbnail_name", 100))
  {
   return("$new_thumbnail_name");
  }
  
  // destroy the images in memory //
  imagedestroy($original_image);
  imagedestroy($canvas);  
  
}
?>

 

but now its completely black lol i must have mucked up lol can you see what i have done wrong at all?

 

cheers

 

Graham

[BlueSkyIS]

this might need to be more like so:

 

  // make the background color white //
  $white_background = imagecolorallocate($im, 255, 255, 255);
  
  $handle = imagefill($canvas, 0, 0, $white_background);