dolphin

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Emmanuel Gil Peyrot 85bb1d7bb0 VideoCommon: Reimplement texture format conversion

This fixes the rendering of the scan visor in Metroid Prime 2: Echoes,
as seen in https://fifoci.dolphin-emu.org/dff/mp2-scanner/

The alpha channel was off-by-one on Ivy Bridge due to the rounding
after multiplication with colmat.  This commit removes this matrix
altogether in most cases, making them simple GLSL swizzles.

2017-12-02 19:29:01 +01:00