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file_formats.md

File metadata and controls

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File formats

Texpainter uses json and OpenEXR for data entries. These entries are stored in a wad64 archive, with the following contents:

File Content
document.json Contains information about the current workspace, and how data resources are used
data/* Data entries such as images and palettes

Image files

Image files are stored using the OpenEXR file format. This is also the format used when importing and exporting image data. At the time of writing, no other file format is supported. However, it is possible to convert to and from OpenEXR by using other software, such as ImageMagick.

Palette files

Palettes are stored in a specific JSON format. The root element has two keys, colorspace and colors. colorspace can either be linear or g22. linear means that the intensity has linear encoding, and g22 that colors are encoded with gamma set to 2.2. colors is simply an array of RGBA values stored as strings. Below is an example that is a representation of PC RGBI color palette.

{
	"colors": [
		"0.00000000e+00 0.00000000e+00 0.00000000e+00 1.00000000e+00",
		"8.91935069e-02 8.91935069e-02 8.91935069e-02 1.00000000e+00",
		"0.00000000e+00 0.00000000e+00 4.09825738e-01 1.00000000e+00",
		"8.91935069e-02 8.91935069e-02 1.00000000e+00 1.00000000e+00",
		"0.00000000e+00 4.09825738e-01 0.00000000e+00 1.00000000e+00",
		"8.91935069e-02 1.00000000e+00 8.91935069e-02 1.00000000e+00",
		"0.00000000e+00 4.09825738e-01 4.09825738e-01 1.00000000e+00",
		"8.91935069e-02 1.00000000e+00 1.00000000e+00 1.00000000e+00",
		"4.09825738e-01 0.00000000e+00 0.00000000e+00 1.00000000e+00",
		"1.00000000e+00 8.91935069e-02 8.91935069e-02 1.00000000e+00",
		"4.09825738e-01 0.00000000e+00 4.09825738e-01 1.00000000e+00",
		"1.00000000e+00 8.91935069e-02 1.00000000e+00 1.00000000e+00",
		"4.09825738e-01 8.91935069e-02 0.00000000e+00 1.00000000e+00",
		"1.00000000e+00 1.00000000e+00 8.91935069e-02 1.00000000e+00",
		"4.09825738e-01 4.09825738e-01 4.09825738e-01 1.00000000e+00",
		"1.00000000e+00 1.00000000e+00 1.00000000e+00 1.00000000e+00"
	],
	"colorspace": "linear"
}