I have seen .ico icons that have different images for multiple sizes, eg. 16x16, 32x32, 48x48, 128x128, 256x256. On Windows, how can I create an icon file that supports multiple sizes in this way, given I have existing .ico files for each size? Please note that I'm hoping to do this to 200+ files, so doing it from cmd would be ideal.
convert 16.png 32.png 48.png 128.png 256.png -colors 256 icon.ico
The previous command takes 5 PNG images, and combines them into a single .ico file.
Unlike the other answers, this method can easily be used in batch scripts to automatically generate several icon files. In one of my projects, I have a single vector image (SVG), and use Inkscape to generate png's of various sizes, followed by
convert to create a icon container. This is a reduced example (in a bash script):
#!/bin/bash for size in 16 32 48 128 256; do inkscape -z -e $size.png -w $size -h $size icon.svg >/dev/null 2>/dev/null done convert 16.png 32.png 48.png 128.png 256.png -colors 256 icon.ico
- Open your image in Gimp
- Make your canvas square
- Resize your layer to the image
- Scale the layer to the largest size in your .ico file like 64 pixels
- Duplicate the layer
- Scale the duplicate layer to the next size
- Keep duplicating / scaling for all the sizes you want in your .ico file
- Save as .ico
In your case, you could either start with the largest image and scale down for each duplicated image, or you could just add new layers and import the specific icon images you wanted into that layer.
It is my opinion that Axialis IconMaker is the best solution to icon problems. There's a 30 day trial that will probably solve the problem for you.
I have used Axialis for so many years and on so many projects, I can attest that it is a really worthwhile product. You won't need 30 days! Ha!
You must use a third-party icon-editing program because MSPaint only supports a single icon per file. There are a couple of threads here with recommendations for icon editors, some free, some commercial.
Once you settle on an icon editor, the method of adding icon formats will vary but generally be similar (you click a button or select a menu item to add a new format). Most programs will let you import an icon file when adding an icon format/size, but most also let you create a new format/size from the existing one by re-sizing it.
If you choose to use the create-from-existing option when adding a new format/size, make sure to create them from the largest icon format you have already available since it will have the most data for the re-sizing algorithm to work with. Also, make sure to use a version with transparency when creating an XP/Vista icon since most programs are not great at creating the alpha channel from scratch.