How Filters Work¶
Thumbor handles filters in a pipeline. This means that they run sequentially in the order they are specified! Given an original image with size \(60x40\) and the following transformations:
The resulting image will first check if it can fit into a \(100x100\). Since it does, the filter pipeline will kick in and:
add the watermark in the image;
blur the whole image (including the watermark);
Fill the outer parts of the image with red (so it will fit in \(100x100\));
Then it will try to upscale. This will have no effect, since at this point the image is already \(100x100\).