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9f78e22fa6
The precise mode of trapezoid rendering need to sample the trapezoid on the centre points of an (2*n+1)x(2*n-1) subpixel grid. It is computationally expensive in shader, and we use inside area ratio to replace it. The result has some difference, and we just use it if the polymode == Imprecise. Signed-off-by: Junyan He <junyan.he@linux.intel.com>
X Server
The X server accepts requests from client applications to create windows,
which are (normally rectangular) "virtual screens" that the client program
can draw into.
Windows are then composed on the actual screen by the X server
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