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[core] fix collisions with icon-text-fit and variable placement #15828
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pozdnyakov
reviewed
Oct 17, 2019
src/mbgl/text/placement.cpp
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| const auto placeFeatureForVariableAnchors = [&] (const CollisionFeature& collisionFeature, style::TextWritingModeType orientation) { | ||
| const bool doVariableIconPlacement = hasIconTextFit && !iconAllowOverlap && symbolInstance.placedIconIndex; | ||
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| const auto placeFeatureForVariableAnchors = [&] (const CollisionFeature& collisionFeature, style::TextWritingModeType orientation, const CollisionFeature& iconCollisionFeature) { |
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nit: s/collisionFeature/textCollisionFeature ?
src/mbgl/text/placement.cpp
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| @@ -329,6 +331,15 @@ void Placement::placeBucket( | |||
| allowOverlap, | |||
| pitchWithMap, | |||
| params.showCollisionBoxes, avoidEdges, collisionGroup.second, textBoxes); | |||
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| if (doVariableIconPlacement) { | |||
| auto placedIconFeature = collisionIndex.placeFeature(iconCollisionFeature, shift, | |||
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do we still need to call placedFeature = collisionIndex.placeFeature(.. above? wouldn't just one placeFeature() call suffice?
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In the case there is negative icon padding (or an icon offset?) the text box might be larger than the icon box. Placing both is the clearest way to handle the possible differences
alexshalamov
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Oct 18, 2019
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port https://github.com/mapbox/mapbox-gl-js/pull/8803/files
When deciding the placement position it was only checking whether there were text collisions. If there was an icon collision then it would hide the icon (and by default, the text with it) instead of trying a different position.
If icon-text-fit is used it now checks whether the icon fits before accepting a placement position.