With this free online image converter tool you can create C arrays or raw binary files from images. PNG, JPG and BMP files are supported. To handle trasparency you can add an alpha byte for every pixel or mark the image as chroma keyed.
The image converter is designed to be compitible with LittlevGL but with minor modification you can make it compatible with other graphics libraries.
LittlevGL - Open-source Embedded GUI Library
LittlevGL is a free and open-source graphics library providing everything you need to create embedded GUI with easy-to-use graphical elements, beautiful visual effects and low memory footprint.
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The founder of Littlev Graphics Library (LittlevGL) and related software modules is:
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