Bitmap: Difference between revisions

Revision as of 08:57, 6 January 2022

Revision as of 09:10, 6 January 2022

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==Pixel storage==

orIn mummytypical and[[image daddy l;eft ucompression|uncompressed]] bitmaps, image [[pixel]]s are generally stored with a variable number of bits per pixel which identify its color, the [[color depth]]. Pixels of 8 bits and fewer can represent either [[grayscale]] or [[indexed color]]. An [[alpha channel]] (for [[transparency (graphic)|transparency]]) may be stored in a separate bitmap, where it is similar to a grayscale bitmap, or in a fourth channel that, for example, converts 24-bit images to 32 bits per pixel.

The bits representing the bitmap pixels may be [[packed]] or unpacked (spaced out to byte or word boundaries), depending on the format or device requirements. Depending on the color depth, a pixel in the picture will occupy at least '''n/8''' bytes, where n is the bit depth.