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James Dansereau
944b28bd0d
The sm64ex 3-point filter shader path already existed in gfx_opengl.cpp but
was never reachable from config, and its min-filter row was all GL_NEAREST
(no mip sampling) so it would shimmer badly.
- gfx_opengl.cpp: 3-point min-filter row -> GL_LINEAR_MIPMAP_{NEAREST,LINEAR}
so minification uses the mips it already force-generates at upload;
anisotropy default 0 -> 4 (0 was invalid for GL_TEXTURE_MAX_ANISOTROPY).
- video.c: Video.TextureFilter now accepts 2 = 3-point + trilinear.
DEFAULT STAYS 1 (bilinear) -- 3-point is more console-authentic but
softens textures at normal viewing distance, and (tested) did NOT fix
the Depot roof garbage. That is a separate texture-data/UV/effect bug,
not filtering -- BRIEF-B2 updated, next step is a GE_DTEX probe.
Verified: default (bilinear) -level_09 frame 320 unregressed vs golden
(nonclear delta 0.00pp, phash 11); build green; 1200-frame -level_30 run
crash-free with 3-point active.