Hello, Am working on achieving the *Integer Scaling *through GPU composition.
What is Integer Scaling ? It is an up-scaling technique that simply scales up the client's Source data pixels by an integer multiplier using NN(Nearest Neighbor) scaling filter. With Integer Scaling through NN filter, low resolution pixel art games being scaled to high resolution displays(4k & 8k resolution panels) with sharp edges. Explained below with an example what we are trying to achieve. EX: If the pixel art game is with a resolution of 640x480 which should render on a 1920x1080 panel. To upscale 640x480 to an integer multiplier resolution, it should upscale only to 1280x960 but not to 1920x1440 because it is beyond the panel resolution. The up-scaled (1280*960) image should be displayed on 1920x1080 panel. The remaining pixel beyond the 1280x960 should be greyed-out. This is what we are trying to achieve by enabling Integer scaling only in FULL SCREEN mode. And when IS is enabled, it should use only NN as its scaling filter in GL Composition path. What is present in Weston currently ? I know that there is scaling logic already present in the Weston compositor in GL composition path. *But just wanted to know whether it is Integer scaling as mentioned above ? If not, does it possible to implement Integer Scaling in the compositor ?* As i had a conversation in IRC, *Scaling needs to be done at Client itself*. But it is not feasible for each and every app should do necessary code changes to do so. Please suggest an approach to achieve this IS with in the compositor itself. Thanks in-advance Thanks Uday Kiran
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