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Get rid of float conversion lookup table

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Pavel Krajcevski 2014-03-25 16:21:17 -04:00
parent 663caada50
commit 7af6cca4d5
1 changed files with 2 additions and 20 deletions
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22
BPTCEncoder/src/RGBAEndpoints.cpp
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@ -98,24 +98,6 @@ static T max(const T &a, const T &b) {
#endif
static const double kPi = 3.141592653589793238462643383279502884197;
static const float kFloatConversion[256] = {
0.0f, 1.0f, 2.0f, 3.0f, 4.0f, 5.0f, 6.0f, 7.0f, 8.0f, 9.0f, 10.0f, 11.0f, 12.0f, 13.0f, 14.0f, 15.0f,
16.0f, 17.0f, 18.0f, 19.0f, 20.0f, 21.0f, 22.0f, 23.0f, 24.0f, 25.0f, 26.0f, 27.0f, 28.0f, 29.0f, 30.0f, 31.0f,
32.0f, 33.0f, 34.0f, 35.0f, 36.0f, 37.0f, 38.0f, 39.0f, 40.0f, 41.0f, 42.0f, 43.0f, 44.0f, 45.0f, 46.0f, 47.0f,
48.0f, 49.0f, 50.0f, 51.0f, 52.0f, 53.0f, 54.0f, 55.0f, 56.0f, 57.0f, 58.0f, 59.0f, 60.0f, 61.0f, 62.0f, 63.0f,
64.0f, 65.0f, 66.0f, 67.0f, 68.0f, 69.0f, 70.0f, 71.0f, 72.0f, 73.0f, 74.0f, 75.0f, 76.0f, 77.0f, 78.0f, 79.0f,
80.0f, 81.0f, 82.0f, 83.0f, 84.0f, 85.0f, 86.0f, 87.0f, 88.0f, 89.0f, 90.0f, 91.0f, 92.0f, 93.0f, 94.0f, 95.0f,
96.0f, 97.0f, 98.0f, 99.0f, 100.0f, 101.0f, 102.0f, 103.0f, 104.0f, 105.0f, 106.0f, 107.0f, 108.0f, 109.0f, 110.0f, 111.0f,
112.0f, 113.0f, 114.0f, 115.0f, 116.0f, 117.0f, 118.0f, 119.0f, 120.0f, 121.0f, 122.0f, 123.0f, 124.0f, 125.0f, 126.0f, 127.0f,
128.0f, 129.0f, 130.0f, 131.0f, 132.0f, 133.0f, 134.0f, 135.0f, 136.0f, 137.0f, 138.0f, 139.0f, 140.0f, 141.0f, 142.0f, 143.0f,
144.0f, 145.0f, 146.0f, 147.0f, 148.0f, 149.0f, 150.0f, 151.0f, 152.0f, 153.0f, 154.0f, 155.0f, 156.0f, 157.0f, 158.0f, 159.0f,
160.0f, 161.0f, 162.0f, 163.0f, 164.0f, 165.0f, 166.0f, 167.0f, 168.0f, 169.0f, 170.0f, 171.0f, 172.0f, 173.0f, 174.0f, 175.0f,
176.0f, 177.0f, 178.0f, 179.0f, 180.0f, 181.0f, 182.0f, 183.0f, 184.0f, 185.0f, 186.0f, 187.0f, 188.0f, 189.0f, 190.0f, 191.0f,
192.0f, 193.0f, 194.0f, 195.0f, 196.0f, 197.0f, 198.0f, 199.0f, 200.0f, 201.0f, 202.0f, 203.0f, 204.0f, 205.0f, 206.0f, 207.0f,
208.0f, 209.0f, 210.0f, 211.0f, 212.0f, 213.0f, 214.0f, 215.0f, 216.0f, 217.0f, 218.0f, 219.0f, 220.0f, 221.0f, 222.0f, 223.0f,
224.0f, 225.0f, 226.0f, 227.0f, 228.0f, 229.0f, 230.0f, 231.0f, 232.0f, 233.0f, 234.0f, 235.0f, 236.0f, 237.0f, 238.0f, 239.0f,
240.0f, 241.0f, 242.0f, 243.0f, 244.0f, 245.0f, 246.0f, 247.0f, 248.0f, 249.0f, 250.0f, 251.0f, 252.0f, 253.0f, 254.0f, 255.0f
};
///////////////////////////////////////////////////////////////////////////////
//
@ -304,7 +286,7 @@ double RGBACluster::QuantizedError(
for(uint32 k = 0; k < kNumColorChannels; k++) {
const uint8 ip = (((uint32(pqp1[k]) * interp0) + (uint32(pqp2[k]) * interp1) + 32) >> 6) & 0xFF;
const uint8 dist = sad(pb[k], ip);
errorVec[k] = kFloatConversion[dist] * metric[k];
errorVec[k] = static_cast<float>(dist) * metric[k];
}
float error = errorVec * errorVec;
@ -395,7 +377,7 @@ uint32 RGBACluster::GetPrincipalAxis(RGBADir &axis, float *eigOne, float *eigTwo
sum += toPts[k][i] * toPts[k][j];
}
covMatrix(i, j) = sum / kFloatConversion[kNumColorChannels - 1];
covMatrix(i, j) = sum / static_cast<float>(kNumColorChannels - 1);
covMatrix(j, i) = covMatrix(i, j);
}
}