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I have a modified version of the originalMsdf gen.

I call it Msdf3

I optimize 'Closest edge search' by using 'closet edges lookup table bitmap'

I have implement it here...

please note that now we are in debug mode,
it should be faster on release mode

All tests use Roboto font, 26 pts

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1. PixelFarm's LcdEffect SubPixelRendering Atlas texture

(click on the image to see detail)

PixelFarm's LcdEffectSubPixelRendering Atlas Texture, built-time about 220ms

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2. Msdf gen,C# port from original

Msdf, C# version, built-time about 7,101ms

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3. a Modified version, (I call it 'Msdf3')

Msdf3, C# version, built-time about 1,096ms

Event the result images are different, but it give the acceptable glyph image,
(see later)