Watermark Not Scaling Down #874
Description
Thumbor request URL
Expected behaviour
When using the watermark filter, I would create a large watermark image that can be used for large and small images. The watermark image should scale down to fit the size of the output image.
Actual behaviour
When using the watermark filter along with any resizing of an image, the watermark does not scale to the output image. If I have a small image at 100x100 and my watermark is 1000x10, the watermark is too big for the image. If I have large image at 1000x1000 and my watermark is small, then it is too small to see on the big image.
Operating system
Ubuntu
More detail
The watermark image I am using has a logo to the left and copyright information to the right. It is 1000x30 (300 dpi) in size. Images on our site very from 4096x4096 to 100x100. By using a large watermark, it ensures that it can be seen on any of these images. But it has to scale down to fit the image output for this to work.
I can resize the image on the fly using thumbor for the watermark itself but this ends up putting a huge load on the server because it has to recreate the watermark for every image. If I'm displaying 20 or more images, the server starts to lag and crash. So this is not a very efficient work-around.
It should be built into thumbor that the watermark auto scales with the image.
Am I doing something wrong?