negativeExponent fa74a364de Fix colour emphasis support for NTSC filter & raw palette + nes decoder shader ...

- this implementation is based on a more accurate colour emphasis from fceux.

- The raw palette + nes decoder shader was kinda incomplete since the implementation was based on
a per-frame basis which means that the emphasis bits were read once and applied to the whole frame. This
means that some games that uses a per pixel or per scanline emphasis would not appear correct. The more
accurate implementation reads emphasis bits from bits 5-7 of PPU[1] and saves this info in a separate frame.

- The same implementation is also used to fix emphasis for the ntsc filter.

2020-02-25 21:05:47 +08:00

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