Fix error double accounting in fuzzyCompare()
fuzzyCompare() has a loop to go through all the pixels and generate error sum.
It skips some pixels using random number generator between 0-8.
Random number generator sometime generate 0 and it ends up
calculating error sum twice for the same pixel.
If this pixel has error, then this add up error sum twice.
Components: Framework
Change-Id: I08e06e29faedb99cfd8fa479e97a437c06008848
diff --git a/framework/common/tcuFuzzyImageCompare.cpp b/framework/common/tcuFuzzyImageCompare.cpp
index 596ab83..4e76476 100644
--- a/framework/common/tcuFuzzyImageCompare.cpp
+++ b/framework/common/tcuFuzzyImageCompare.cpp
@@ -318,7 +318,7 @@
for (int y = 1; y < height-1; y++)
{
- for (int x = 1; x < width-1; x += params.maxSampleSkip > 0 ? (int)rnd.getInt(0, params.maxSampleSkip) : 1)
+ for (int x = 1; x < width-1; x += 1 + (int)rnd.getInt(0, params.maxSampleSkip))
{
const deUint32 minDist2RefToCmp = distSquaredToNeighbor<4>(rnd, readUnorm8<4>(refAccess, x, y), cmpAccess, x, y);
const deUint32 minDist2CmpToRef = distSquaredToNeighbor<4>(rnd, readUnorm8<4>(cmpAccess, x, y), refAccess, x, y);