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pcsx2: Implement IPU VQ conversion 

Fixes the blue flames in Klonoa 2.
This commit is contained in:
Jonathan Li 2020-03-21 21:08:55 +00:00
parent dca0c4ed79
commit efe3bc1613
1 changed files with 24 additions and 1 deletions
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25
pcsx2/IPU/IPU.cpp
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@ -679,7 +679,30 @@ __fi void ipu_csc(macroblock_8& mb8, macroblock_rgb32& rgb32, int sgn)
__fi void ipu_vq(macroblock_rgb16& rgb16, u8* indx4)
{
Console.Error("IPU: VQ not implemented");
const auto closest_index = [&](int i, int j) {
u8 index = 0;
int min_distance = std::numeric_limits<int>::max();
for (u8 k = 0; k < 16; ++k)
{
const int dr = rgb16.c[i][j].r - vqclut[k].r;
const int dg = rgb16.c[i][j].g - vqclut[k].g;
const int db = rgb16.c[i][j].b - vqclut[k].b;
const int distance = dr * dr + dg * dg + db * db;
// XXX: If two distances are the same which index is used?
if (min_distance > distance)
{
index = k;
min_distance = distance;
}
}
return index;
};
for (int i = 0; i < 16; ++i)
for (int j = 0; j < 8; ++j)
indx4[i * 8 + j] = closest_index(i, 2 * j + 1) << 4 | closest_index(i, 2 * j);
}