I have two photos ( 1.jpg and 2.jpg) I want to make photo 2.jpg as a background and photo 1.jpg red colored overlay and I want the output to be like photo 3.jpg as follow ( I want to put photo number 1 on top of photo number 2 and make it transparent 50%): **Photo 1.jpg ( overlay)** **Photo 2.jpg ( background)** **Photo 3.jpg ( final output)** I tried the commands **convert and composite** ( part of ImageMagick but following multiple attempts I failed to figure out the correct flags that I should use)

I need to update a logo bitmap to an updated logo. The existing code uses a C header which is loaded via XChangeProperty. I have looked into imagemagick and the Gimp in order to convert the updated png I have into a suitable header. Gimp even said 'export a C header' (or something like it) but the result did not resemble the existing format. How do I go (preferably on the command-line) from a png to a suitable header file? *Edit:* Expanding the question a little, the (now out of date) logo I would like to replace is [in this file](https://github.com/wch/r-source/blob/trunk/src/modules/X11/rlogo_icon.h) and [gets used here](https://github.com/wch/r-source/blob/trunk/src/modules/X11/devX11.c#L1604-L1609) .

So, I have a bunch of files that I use as the basis for my wallpapers. Using ImageMagick , I can convert then using: convert \ -resize '1920x1080>' \ -extent 1920x1080 \ -background '#000000' \ -gravity SouthEast \ $file $dir/$file So that the image is moved to the lower right area of the screen. This area has little or no windows thus I can actually see the wallpapper. The reason I do this is that some of the images are bigger than my monitor and thus need rescaling instead of just putting there. However, using GraphicMagick with the above command, results in the image being moved towards the upper right corner! *How can I achieve a similar effect with GraphicMagick ?* For an example, this is one of the post processed images: