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softgpu: Correct nearest filtering too.

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Turns out to have the same behavior as linear, when it comes to the
subpixel offset.
This commit is contained in:
Unknown W. Brackets 2021-12-25 14:28:56 -08:00
parent 1dfaea9062
commit d6b6ef4cb1
1 changed files with 5 additions and 6 deletions
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11
GPU/Software/Rasterizer.cpp
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@ -201,13 +201,12 @@ static inline Vec4IntResult SOFTRAST_CALL ApplyTexelClampQuadT(bool clamp, int v
#endif
}
static inline void GetTexelCoordinates(int level, float s, float t, int& out_u, int& out_v)
{
static inline void GetTexelCoordinates(int level, float s, float t, int &out_u, int &out_v, int x, int y) {
int width = gstate.getTextureWidth(level);
int height = gstate.getTextureHeight(level);
int base_u = (int)(s * width * 256.0f + 0.375f);
int base_v = (int)(t * height * 256.0f + 0.375f);
int base_u = (int)(s * width * 256.0f) + 12 - x;
int base_v = (int)(t * height * 256.0f) + 12 - y;
base_u >>= 8;
base_v >>= 8;
@ -607,9 +606,9 @@ static inline Vec4IntResult SOFTRAST_CALL ApplyTexturing(Sampler::Funcs sampler,
int u[8] = { 0 }, v[8] = { 0 }; // 1.27.4 fixed point
// Nearest filtering only. Round texcoords.
GetTexelCoordinates(mayHaveMipLevels ? texlevel : 0, s, t, u[0], v[0]);
GetTexelCoordinates(mayHaveMipLevels ? texlevel : 0, s, t, u[0], v[0], x, y);
if (mayHaveMipLevels && frac_texlevel) {
GetTexelCoordinates(texlevel + 1, s, t, u[1], v[1]);
GetTexelCoordinates(texlevel + 1, s, t, u[1], v[1], x, y);
}
texcolor0 = Vec4<int>(sampler.nearest(u[0], v[0], tptr0, bufw0, mayHaveMipLevels ? texlevel : 0));