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Tools/Images/README.md
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## bmp2array4bit
bmp2array4bit.py creates C (or C++) code that contains two arrays for adding images to four-bit sprites. See Sprite_image_4bit for an example.
bmp2array4bit.py reads a bmp file, and creates C (or C++) code that contains two arrays for adding images to four-bit sprites. See [Sprite_image_4bit](../../examples/Sprite/Sprite_image_4bit) for an example.
It is loosely based on Spark Fun's bmp2array script.
It is loosely based on Spark Fun's bmp2array script, https://github.com/sparkfun/BMPtoArray/blob/master/bmp2array.py. The bmp file format is documented in https://en.wikipedia.org/wiki/BMP_file_format.
You'll need python 3.6 (the original use Python 2.7)
You'll need python 3.6 (the original uses Python 2.7)
usage: python bmp2array4bit.py [-v] star.bmp [-o myfile.c]
`usage: python bmp2array4bit.py [-v] star.bmp [-o myfile.c]`
Create the bmp file in Gimp from any image by:
Create the bmp file in Gimp (www.gimp.org) from any image as follows:
. Remove the alpha channel (if it has one)
* Remove the alpha channel (if it has one)
Layer -> Transparency -> Remove Alpha Channel
. Set the mode to indexed.
* Set the mode to indexed.
Image -> Mode -> Indexed...
. Select Generate optimum palette with 16 colors (max)
. Export the file with a .bmp extension. Do NOT select options:
. Run-Length Encoded
. Compatibility Options: "Do not write color space information"
. There are no Advanced Options available with these settings
* Select Generate optimum palette with 16 colors (max)
* Export the file with a .bmp extension. Do **NOT** select options:
* Run-Length Encoded
* Compatibility Options: "Do not write color space information"
* There are no Advanced Options available with these settings
I don't have photoshop so cannot help you with that.
(There are other tools that will produce bmp files, and these should work provided you don't use run-length encoding or other advanced features).
The first array produced is the palette for the image.
The second is the image itself.