display | more...
A frame buffer graphics device is an idealization or abstraction of your computer's video hardware in order to make programming it simple. It simulates or provides in actual memory a space which maps to the screen byte for byte (or word for word, or 32 bit longword for longword), in such a way that the data at offset 0 stands for the pixel at coordinate (0,0), and so on until the end of line 0 (which has, for example, 1024 pixels), so that byte 1024 represents (0,1), etc.
This makes creating graphics off-screen easy, since you only have to allocate and write to a memory block of the same size as the frame buffer, and then copy the off- screen buffer into the frame buffer.
Frame buffer devices may fulfill more complex tasks, but the thing here is the minimum.

Log in or register to write something here or to contact authors.