| 56 | } |
| 57 | |
| 58 | void LiveWriteMultipleTile::process(const ispc::Tile &tile) |
| 59 | { |
| 60 | if (writeOnceTile) { |
| 61 | finished.region = tile.region; |
| 62 | finished.fbSize = tile.fbSize; |
| 63 | finished.rcp_fbSize = tile.rcp_fbSize; |
| 64 | accumulate(tile); |
| 65 | tileIsFinished(); |
| 66 | return; |
| 67 | } |
| 68 | |
| 69 | bool done = false; |
| 70 | if (tile.accumID == 0) { |
| 71 | finished.region = tile.region; |
| 72 | finished.fbSize = tile.fbSize; |
| 73 | finished.rcp_fbSize = tile.rcp_fbSize; |
| 74 | |
| 75 | const auto bytes = tile.region.size().y * (TILE_SIZE * sizeof(float)); |
| 76 | memcpy(accum.z, tile.z, bytes); |
| 77 | memcpy(finished.z, tile.z, bytes); |
| 78 | } |
| 79 | |
| 80 | { |
| 81 | std::lock_guard<std::mutex> lock(mutex); |
| 82 | maxAccumID = std::max(maxAccumID, tile.accumID); |
| 83 | if (!tileBuffered && (tile.accumID & 1) == 0) { |
| 84 | memcpy(&bufferedTile, &tile, sizeof(ispc::Tile)); |
| 85 | tileBuffered = true; |
| 86 | } else { |
| 87 | ispc::DFB_accumulateTileSimple((const ispc::VaryingTile *)&tile, |
| 88 | (ispc::VaryingTile *)&accum, |
| 89 | (ispc::VaryingTile *)&variance); |
| 90 | |
| 91 | if (dfb->hasNormalBuf() || dfb->hasAlbedoBuf()) { |
| 92 | ispc::DFB_accumulateAuxTile((const ispc::VaryingTile *)&tile, |
| 93 | (ispc::Tile *)&finished, |
| 94 | (ispc::VaryingTile *)&accum); |
| 95 | } |
| 96 | } |
| 97 | done = --instances == 0; |
| 98 | } |
| 99 | |
| 100 | if (done) { |
| 101 | auto sz = tile.region.size(); |
| 102 | if ((maxAccumID & 1) == 0) { |
| 103 | // if maxAccumID is even, variance buffer is one accumulated tile |
| 104 | // short, which leads to vast over-estimation of variance; thus |
| 105 | // estimate variance now, when accum buffer is also one (the buffered) |
| 106 | // tile short |
| 107 | const float prevErr = DFB_computeErrorForTile(sz, |
| 108 | (ispc::VaryingTile *)&accum, |
| 109 | (ispc::VaryingTile *)&variance, |
| 110 | maxAccumID - 1); |
| 111 | // use maxAccumID for correct normalization |
| 112 | // this is OK, because both accumIDs are even |
| 113 | bufferedTile.accumID = maxAccumID; |
| 114 | accumulate(bufferedTile); |
| 115 | error = prevErr; |
no test coverage detected