This is as discussed in: https://gerrit.libreoffice.org/#/c/82221/ which (apart from the patch expanding the area in totally the wrong place - should be after we check for empty or before the intersection) - seems to rather help. bin/run tilebench `pwd`/instdir/program libreofficekit/qa/data/join/calc-100-textjitter.xlsx --join with the patch: Zoom 0.5 bad tiles: 2 with 228 mismatching pixels Zoom 0.85 bad tiles: 1 with 171 mismatching pixels Zoom 1 bad tiles: 1 with 103 mismatching pixels without the patch: Zoom 0.5 bad tiles: 64 with 1227 mismatching pixels Zoom 0.6 bad tiles: 64 with 1227 mismatching pixels Zoom 0.7 bad tiles: 64 with 1456 mismatching pixels Zoom 0.85 bad tiles: 64 with 1978 mismatching pixels Zoom 1 bad tiles: 64 with 2215 mismatching pixels Zoom 1.2 bad tiles: 64 with 2609 mismatching pixels Zoom 1.5 bad tiles: 64 with 3023 mismatching pixels Zoom 1.75 bad tiles: 64 with 4039 mismatching pixels Zoom 2 bad tiles: 64 with 4406 mismatching pixels So ~all tiles are bad there I think. I attach a picture of the: /tmp/dump_tile_diff to show the fun =)
Created attachment 155706 [details] a picture. On the left - we have a quarter of a larger region that was rendered, in the middle we have rendering the same tile by itself, and on the right a delta - red pixels on the right and bottom are the differences, and we grey-out the content where things match. =)
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