Cursor movement in Linux 16610

Incorrect. I thought I explained this earlier, but perhaps you missed it because of all the crap in this thread.

Consider an LCD pixel, consisting of a red sub-pixel, a green sub-pixel, and a blue sub-pixel. If you want that red sub-pixel to have a value of 0x12, the blue one to have a value of 0x34, and the green one to have a value of 0x56, you can get that by setting the pixel to 0x123456.

This works because there is a consistent mapping between pixels and groups of 3 sub-pixels. On a CRT, there is no such consistent mapping. Software generally can't know on a CRT what pixel a given colored dot belongs to, and, furthermore, a given pixel can actually affect more than one dot of a given color.

Because of the precise relationship between pixels and sub-pixels on an LCD, ClearType can calculate anti-aliasing based on the sub-pixels. The result of that calculation is a set of *pixel* values to send to the display that will cause that display to set the proper values for each sub-pixel.

If you take a screen capture, you get those same pixel values. When that screen capture is then displayed on an LCD with the same physical arrangement of sub-pixels in its pixels, all the sub-pixel values get set to the values ClearType wanted, and you see the full effect of ClearType.

-- --Tim Smith