- const tcu::Vec2 clampedLod = tcu::clampLodBounds(lodBounds + lodBias, tcu::Vec2(sampleParams.minLod, sampleParams.maxLod), lodPrec);
- const bool isOk = tcu::isLookupResultValid(src, sampleParams.sampler, lookupPrec, coord, clampedLod, resPix);
+ // Compute lod bounds across lodOffsets range.
+ for (int lodOffsNdx = 0; lodOffsNdx < DE_LENGTH_OF_ARRAY(lodOffsets); lodOffsNdx++)
+ {
+ const float wxo = triWx + lodOffsets[lodOffsNdx].x();
+ const float wyo = triWy + lodOffsets[lodOffsNdx].y();
+ const float nxo = wxo/dstW;
+ const float nyo = wyo/dstH;
+
+ const tcu::Vec2 coordDxo = tcu::Vec2(triDerivateX(triS[triNdx], triW[triNdx], wxo, dstW, nyo),
+ triDerivateX(triT[triNdx], triW[triNdx], wxo, dstW, nyo)) * srcSize.asFloat();
+ const tcu::Vec2 coordDyo = tcu::Vec2(triDerivateY(triS[triNdx], triW[triNdx], wyo, dstH, nxo),
+ triDerivateY(triT[triNdx], triW[triNdx], wyo, dstH, nxo)) * srcSize.asFloat();
+ const tcu::Vec2 lodO = tcu::computeLodBoundsFromDerivates(coordDxo.x(), coordDxo.y(), coordDyo.x(), coordDyo.y(), lodPrec);
+
+ lodBounds.x() = de::min(lodBounds.x(), lodO.x());
+ lodBounds.y() = de::max(lodBounds.y(), lodO.y());
+ }
+
+ const tcu::Vec2 clampedLod = tcu::clampLodBounds(lodBounds + lodBias, tcu::Vec2(sampleParams.minLod, sampleParams.maxLod), lodPrec);
+ if (tcu::isLookupResultValid(src, sampleParams.sampler, lookupPrec, coord, clampedLod, resPix))
+ {
+ isOk = true;
+ break;
+ }
+ }