GraphicsMagick - position item in bottom left

Question

After trying every combination of commands that I could possibly think of I still can't get this to work.

I have a large image that can vary in size: Logo.png I have a small image of a 'known' size: Wallpaper.png

I want Logo to appear in the Bottom Left of Wallpaper.

This has to be done using the 'gm convert' command using -flatten. Using 'gm composite' would require me to run two commands which isn't acceptable as it would add too much time to our processing per image.

Here is the command so far (there will be more added to this command but here is the core of it):

wallpaper.png -page +0+0 -gravity SouthWest logo.png -compose over -flatten result.jpg

This puts the logo in the top left. Gravity appears to be ignored. Using +100% for -page does not work either.

Answer 1

I don't see the need for your use of -flatten and +page

The following ImageMagick command should work:

convert              \
  -composite         \
  -geometry +10+20   \
  -gravity southwest \
   background.png    \
   logo.png          \
   result.png

For GraphicsMagick this needs to change to:

gm                   \
   composite         \
  -geometry +10+20   \
  -gravity southwest \
   logo.png          \
   background.png    \
   result.png

I added +10+20 to demonstrate how you can offset the overlaid logo a little bit from the extreme lower left corner.