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Add minor performance enhancements

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This commit is contained in:
Pavel Krajcevski 2012-09-13 16:31:48 -04:00
parent f2b9c39801
commit 31f6233da2
1 changed files with 8 additions and 9 deletions
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17
BPTCEncoder/src/RGBAEndpoints.cpp
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@ -172,15 +172,13 @@ uint8 QuantizeChannel(const uint8 val, const uint8 mask, const int pBit) {
}
uint32 RGBAVector::ToPixel(const uint32 channelMask, const int pBit) const {
uint32 ret = 0;
uint8 *pRet = (uint8 *)&ret;
const uint8 *channelMaskBytes = (const uint8 *)&channelMask;
const uint8 pRet0 = QuantizeChannel(uint32(r + 0.5) & 0xFF, channelMask & 0xFF, pBit);
const uint8 pRet1 = QuantizeChannel(uint32(g + 0.5) & 0xFF, (channelMask >> 8) & 0xFF, pBit);
const uint8 pRet2 = QuantizeChannel(uint32(b + 0.5) & 0xFF, (channelMask >> 16) & 0xFF, pBit);
const uint8 pRet3 = QuantizeChannel(uint32(a + 0.5) & 0xFF, (channelMask >> 24) & 0xFF, pBit);
pRet[0] = QuantizeChannel(uint32(r + 0.5) & 0xFF, channelMaskBytes[0], pBit);
pRet[1] = QuantizeChannel(uint32(g + 0.5) & 0xFF, channelMaskBytes[1], pBit);
pRet[2] = QuantizeChannel(uint32(b + 0.5) & 0xFF, channelMaskBytes[2], pBit);
pRet[3] = QuantizeChannel(uint32(a + 0.5) & 0xFF, channelMaskBytes[3], pBit);
const uint32 ret = pRet0 | (pRet1 << 8) | (pRet2 << 16) | (pRet3 << 24);
return ret;
}
@ -341,6 +339,8 @@ double RGBACluster::QuantizedError(const RGBAVector &p1, const RGBAVector &p2, u
uint8 *pqp1 = (uint8 *)&qp1;
uint8 *pqp2 = (uint8 *)&qp2;
const RGBAVector metric = errorMetricVec;
float totalError = 0.0;
for(int i = 0; i < m_NumPoints; i++) {
@ -358,10 +358,9 @@ double RGBACluster::QuantizedError(const RGBAVector &p1, const RGBAVector &p2, u
for(int 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.c[k] = kFloatConversion[dist];
errorVec.c[k] = kFloatConversion[dist] * metric.c[k];
}
errorVec *= errorMetricVec;
float error = errorVec * errorVec;
if(error < minError) {
minError = error;