Change generated product image background

[tlman12]

Is there a way to change the color of the background that is automatically added when an image upload is regnereated and resized?

 

i guess you used to be able to change it in the image.inc.php or something like that but on 1.5.5 it's not there.

 

 

[PascalVG]

Hi tlman,

 

This is done in classes/ImageManager.php:

		// If image is a PNG and the output is PNG, fill with transparency. Else fill with white background.
		if ($file_type == 'png' && $type == IMAGETYPE_PNG)
		{
			imagealphablending($dest_image, false);
			imagesavealpha($dest_image, true);
			$transparent = imagecolorallocatealpha($dest_image, 255, 255, 255, 127);
			imagefilledrectangle($dest_image, 0, 0, $dst_width, $dst_height, $transparent);
		}
		else
		{
			$white = imagecolorallocate($dest_image, 255, 255, 255);     <-- change 255,255,255 to colour code you need they are stored in $white
			imagefilledrectangle ($dest_image, 0, 0, $dst_width, $dst_height, $white);   <-- $white is the var holding the colour value
		}

just change the values stored in the variable $white into some other colour.

To easy calculate the RGB codes (255,255,255 = white etc, colours are given in order R(ed),G(reen),B(lue)) see here:

http://www.colorpicker.com/

pick the colour you want, and look at the R, G, B, values given here.

So for pure blue change into:

$white = imagecolorallocate($dest_image, 0, 0, 255);

(N.B. $white is just a variable name, not the colour! ;-) )

 

By the way if you use PNG images, and set the image quality to "use png for all images", (Back office: Preferences->Images)

the background colour of your image will be transparent instead of white, so it just shows the current background colour/image.

 

Hope this helps,

pascal

[tlman12]

Hi tlman,

 

This is done in classes/ImageManager.php:

		// If image is a PNG and the output is PNG, fill with transparency. Else fill with white background.
		if ($file_type == 'png' && $type == IMAGETYPE_PNG)
		{
			imagealphablending($dest_image, false);
			imagesavealpha($dest_image, true);
			$transparent = imagecolorallocatealpha($dest_image, 255, 255, 255, 127);
			imagefilledrectangle($dest_image, 0, 0, $dst_width, $dst_height, $transparent);
		}
		else
		{
			$white = imagecolorallocate($dest_image, 255, 255, 255);     <-- change 255,255,255 to colour code you need they are stored in $white
			imagefilledrectangle ($dest_image, 0, 0, $dst_width, $dst_height, $white);   <-- $white is the var holding the colour value
		}

just change the values stored in the variable $white into some other colour.

To easy calculate the RGB codes (255,255,255 = white etc, colours are given in order R(ed),G(reen),B(lue)) see here:

http://www.colorpicker.com/

pick the colour you want, and look at the R, G, B, values given here.

So for pure blue change into:

$white = imagecolorallocate($dest_image, 0, 0, 255);

(N.B. $white is just a variable name, not the colour! ;-) )

 

By the way if you use PNG images, and set the image quality to "use png for all images", (Back office: Preferences->Images)

the background colour of your image will be transparent instead of white, so it just shows the current background colour/image.

image quality.jpg

 

Hope this helps,

pascal

 

Worked perfectly! very informative thank you very much.