The TGA format is a format for defining raster or bitmap images. Targa supports color maps, alpha channel, gamma value, postage stamp image, textual information and developer-definable data. Unlike other image formats, there are relatively few variations.
The TGA format is probably the most universally supported 24-bit and 32-bit file format for PC applications. The 32-bit Targa format contains 24 bits of color data and 8 bits of transparency data. Color support ranges from black and white, indexed and RGB color. Since Windows does not recognize 16-bit and 32-bit depths, some applications may treat them as 24-bit images. A 16-bit image will be up-graded to a 24-bit image while a 32-bit image will be down-graded to a 24-bit image.
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