diff options
Diffstat (limited to 'src/mbgl/text/placement.cpp')
| -rw-r--r-- | src/mbgl/text/placement.cpp | 264 |
1 files changed, 231 insertions, 33 deletions
diff --git a/src/mbgl/text/placement.cpp b/src/mbgl/text/placement.cpp index 4cc12b0980..f6c4ac1eb6 100644 --- a/src/mbgl/text/placement.cpp +++ b/src/mbgl/text/placement.cpp @@ -1,10 +1,13 @@ #include <mbgl/text/placement.hpp> + +#include <mbgl/layout/symbol_layout.hpp> #include <mbgl/renderer/render_layer.hpp> #include <mbgl/renderer/layers/render_layer_symbol_interface.hpp> #include <mbgl/renderer/render_tile.hpp> #include <mbgl/tile/geometry_tile.hpp> #include <mbgl/renderer/buckets/symbol_bucket.hpp> #include <mbgl/renderer/bucket.hpp> +#include <mbgl/util/math.hpp> namespace mbgl { @@ -55,13 +58,18 @@ const CollisionGroups::CollisionGroup& CollisionGroups::get(const std::string& s } } -Placement::Placement(const TransformState& state_, MapMode mapMode_, style::TransitionOptions transitionOptions_, const bool crossSourceCollisions) +Placement::Placement(const TransformState& state_, MapMode mapMode_, style::TransitionOptions transitionOptions_, const bool crossSourceCollisions, std::unique_ptr<Placement> prevPlacement_) : collisionIndex(state_) , state(state_) , mapMode(mapMode_) , transitionOptions(transitionOptions_) , collisionGroups(crossSourceCollisions) -{} + , prevPlacement(std::move(prevPlacement_)) +{ + if (prevPlacement) { + prevPlacement->prevPlacement.reset(); // Only hold on to one placement back + } +} void Placement::placeLayer(const RenderLayerSymbolInterface& symbolInterface, const mat4& projMatrix, bool showCollisionBoxes) { @@ -121,6 +129,19 @@ void Placement::placeLayer(const RenderLayerSymbolInterface& symbolInterface, co } } +namespace { +Point<float> calculateVariableLayoutOffset(style::SymbolAnchorType anchor, float width, float height, float radialOffset, float textBoxScale) { + AnchorAlignment alignment = AnchorAlignment::getAnchorAlignment(anchor); + float shiftX = -(alignment.horizontalAlign - 0.5f) * width; + float shiftY = -(alignment.verticalAlign - 0.5f) * height; + Point<float> offset = SymbolLayout::evaluateRadialOffset(anchor, radialOffset); + return Point<float>( + shiftX + offset.x * textBoxScale, + shiftY + offset.y * textBoxScale + ); +} +} // namespace + void Placement::placeLayerBucket( SymbolBucket& bucket, const mat4& posMatrix, @@ -161,8 +182,11 @@ void Placement::placeLayerBucket( // See https://github.com/mapbox/mapbox-gl-native/issues/12683 const bool alwaysShowText = textAllowOverlap && (iconAllowOverlap || !bucket.hasIconData() || bucket.layout.get<style::IconOptional>()); const bool alwaysShowIcon = iconAllowOverlap && (textAllowOverlap || !bucket.hasTextData() || bucket.layout.get<style::TextOptional>()); + std::vector<style::TextVariableAnchorType> variableTextAnchors = bucket.layout.get<style::TextVariableAnchor>(); + const bool rotateWithMap = bucket.layout.get<style::TextRotationAlignment>() == style::AlignmentType::Map; + const bool pitchWithMap = bucket.layout.get<style::TextPitchAlignment>() == style::AlignmentType::Map; - for (auto& symbolInstance : bucket.symbolInstances) { + for (SymbolInstance& symbolInstance : bucket.symbolInstances) { if (seenCrossTileIDs.count(symbolInstance.crossTileID) == 0) { if (holdingForFade) { @@ -175,30 +199,111 @@ void Placement::placeLayerBucket( bool placeText = false; bool placeIcon = false; bool offscreen = true; - - if (symbolInstance.placedTextIndex) { - PlacedSymbol& placedSymbol = bucket.text.placedSymbols.at(*symbolInstance.placedTextIndex); + optional<size_t> horizontalTextIndex = symbolInstance.getDefaultHorizontalPlacedTextIndex(); + if (horizontalTextIndex) { + CollisionFeature& textCollisionFeature = symbolInstance.textCollisionFeature; + PlacedSymbol& placedSymbol = bucket.text.placedSymbols.at(*horizontalTextIndex); const float fontSize = evaluateSizeForFeature(partiallyEvaluatedTextSize, placedSymbol); - - auto placed = collisionIndex.placeFeature(symbolInstance.textCollisionFeature, - posMatrix, textLabelPlaneMatrix, textPixelRatio, - placedSymbol, scale, fontSize, - bucket.layout.get<style::TextAllowOverlap>(), - bucket.layout.get<style::TextPitchAlignment>() == style::AlignmentType::Map, - showCollisionBoxes, avoidEdges, collisionGroup.second); - placeText = placed.first; - offscreen &= placed.second; + if (variableTextAnchors.empty()) { + auto placed = collisionIndex.placeFeature(textCollisionFeature, {}, + posMatrix, textLabelPlaneMatrix, textPixelRatio, + placedSymbol, scale, fontSize, + bucket.layout.get<style::TextAllowOverlap>(), + pitchWithMap, + showCollisionBoxes, avoidEdges, collisionGroup.second); + placeText = placed.first; + offscreen &= placed.second; + } else if (!textCollisionFeature.alongLine && !textCollisionFeature.boxes.empty()) { + const CollisionBox& textBox = symbolInstance.textCollisionFeature.boxes[0]; + const float width = textBox.x2 - textBox.x1; + const float height = textBox.y2 - textBox.y1; + const float textBoxScale = symbolInstance.textBoxScale; + + // If this symbol was in the last placement, shift the previously used + // anchor to the front of the anchor list. + if (prevPlacement) { + auto prevOffset = prevPlacement->variableOffsets.find(symbolInstance.crossTileID); + if (prevOffset != prevPlacement->variableOffsets.end() && + variableTextAnchors.front() != prevOffset->second.anchor) { + std::vector<style::TextVariableAnchorType> filtered; + filtered.reserve(variableTextAnchors.size()); + filtered.push_back(prevOffset->second.anchor); + for (auto anchor : variableTextAnchors) { + if (anchor != prevOffset->second.anchor) { + filtered.push_back(anchor); + } + } + variableTextAnchors = std::move(filtered); + } + } + + for (auto anchor : variableTextAnchors) { + Point<float> shift = calculateVariableLayoutOffset(anchor, width, height, symbolInstance.radialTextOffset, textBoxScale); + if (rotateWithMap) { + float angle = pitchWithMap ? state.getBearing() : -state.getBearing(); + shift = util::rotate(shift, angle); + } + + auto placed = collisionIndex.placeFeature(textCollisionFeature, shift, + posMatrix, mat4(), textPixelRatio, + placedSymbol, scale, fontSize, + bucket.layout.get<style::TextAllowOverlap>(), + pitchWithMap, + showCollisionBoxes, avoidEdges, collisionGroup.second); + + if (placed.first) { + assert(symbolInstance.crossTileID != 0u); + optional<style::TextVariableAnchorType> prevAnchor; + + // If this label was placed in the previous placement, record the anchor position + // to allow us to animate the transition + if (prevPlacement) { + auto prevOffset = prevPlacement->variableOffsets.find(symbolInstance.crossTileID); + auto prevPlacements = prevPlacement->placements.find(symbolInstance.crossTileID); + if (prevOffset != prevPlacement->variableOffsets.end() && + prevPlacements != prevPlacement->placements.end() && + prevPlacements->second.text) { + prevAnchor = prevOffset->second.anchor; + } + } + + variableOffsets.insert(std::make_pair(symbolInstance.crossTileID, VariableOffset{ + symbolInstance.radialTextOffset, + width, + height, + anchor, + textBoxScale, + prevAnchor + })); + markUsedJustification(bucket, anchor, symbolInstance); + + placeText = placed.first; + offscreen &= placed.second; + break; + } + } + + // If we didn't get placed, we still need to copy our position from the last placement for + // fade animations + if (prevPlacement && variableOffsets.find(symbolInstance.crossTileID) == variableOffsets.end()) { + auto prevOffset = prevPlacement->variableOffsets.find(symbolInstance.crossTileID); + if (prevOffset != prevPlacement->variableOffsets.end()) { + variableOffsets[symbolInstance.crossTileID] = prevOffset->second; + markUsedJustification(bucket, prevOffset->second.anchor, symbolInstance); + } + } + } } if (symbolInstance.placedIconIndex) { PlacedSymbol& placedSymbol = bucket.icon.placedSymbols.at(*symbolInstance.placedIconIndex); const float fontSize = evaluateSizeForFeature(partiallyEvaluatedIconSize, placedSymbol); - auto placed = collisionIndex.placeFeature(symbolInstance.iconCollisionFeature, + auto placed = collisionIndex.placeFeature(symbolInstance.iconCollisionFeature, {}, posMatrix, iconLabelPlaneMatrix, textPixelRatio, placedSymbol, scale, fontSize, bucket.layout.get<style::IconAllowOverlap>(), - bucket.layout.get<style::IconPitchAlignment>() == style::AlignmentType::Map, + pitchWithMap, showCollisionBoxes, avoidEdges, collisionGroup.second); placeIcon = placed.first; offscreen &= placed.second; @@ -240,7 +345,8 @@ void Placement::placeLayerBucket( bucket.justReloaded = false; } -void Placement::commit(const Placement& prevPlacement, TimePoint now) { +void Placement::commit(TimePoint now) { + assert(prevPlacement); commitTime = now; bool placementChanged = false; @@ -248,13 +354,13 @@ void Placement::commit(const Placement& prevPlacement, TimePoint now) { float increment = mapMode == MapMode::Continuous && transitionOptions.enablePlacementTransitions && transitionOptions.duration.value_or(util::DEFAULT_TRANSITION_DURATION) > Milliseconds(0) ? - std::chrono::duration<float>(commitTime - prevPlacement.commitTime) / transitionOptions.duration.value_or(util::DEFAULT_TRANSITION_DURATION) : + std::chrono::duration<float>(commitTime - prevPlacement->commitTime) / transitionOptions.duration.value_or(util::DEFAULT_TRANSITION_DURATION) : 1.0; // add the opacities from the current placement, and copy their current values from the previous placement for (auto& jointPlacement : placements) { - auto prevOpacity = prevPlacement.opacities.find(jointPlacement.first); - if (prevOpacity != prevPlacement.opacities.end()) { + auto prevOpacity = prevPlacement->opacities.find(jointPlacement.first); + if (prevOpacity != prevPlacement->opacities.end()) { opacities.emplace(jointPlacement.first, JointOpacityState(prevOpacity->second, increment, jointPlacement.second.text, jointPlacement.second.icon)); placementChanged = placementChanged || jointPlacement.second.icon != prevOpacity->second.icon.placed || @@ -266,7 +372,7 @@ void Placement::commit(const Placement& prevPlacement, TimePoint now) { } // copy and update values from the previous placement that aren't in the current placement but haven't finished fading - for (auto& prevOpacity : prevPlacement.opacities) { + for (auto& prevOpacity : prevPlacement->opacities) { if (opacities.find(prevOpacity.first) == opacities.end()) { JointOpacityState jointOpacity(prevOpacity.second, increment, false, false); if (!jointOpacity.isHidden()) { @@ -276,7 +382,16 @@ void Placement::commit(const Placement& prevPlacement, TimePoint now) { } } - fadeStartTime = placementChanged ? commitTime : prevPlacement.fadeStartTime; + for (auto& prevOffset : prevPlacement->variableOffsets) { + const uint32_t crossTileID = prevOffset.first; + auto foundOffset = variableOffsets.find(crossTileID); + auto foundOpacity = opacities.find(crossTileID); + if (foundOffset == variableOffsets.end() && foundOpacity != opacities.end() && !foundOpacity->second.isHidden()) { + variableOffsets[prevOffset.first] = prevOffset.second; + } + } + + fadeStartTime = placementChanged ? commitTime : prevPlacement->fadeStartTime; } void Placement::updateLayerOpacities(const RenderLayerSymbolInterface& symbolInterface) { @@ -310,7 +425,10 @@ void Placement::updateBucketOpacities(SymbolBucket& bucket, std::set<uint32_t>& const bool textAllowOverlap = bucket.layout.get<style::TextAllowOverlap>(); const bool iconAllowOverlap = bucket.layout.get<style::IconAllowOverlap>(); - + const bool variablePlacement = !bucket.layout.get<style::TextVariableAnchor>().empty(); + const bool rotateWithMap = bucket.layout.get<style::TextRotationAlignment>() == style::AlignmentType::Map; + const bool pitchWithMap = bucket.layout.get<style::TextPitchAlignment>() == style::AlignmentType::Map; + // If allow-overlap is true, we can show symbols before placement runs on them // But we have to wait for placement if we potentially depend on a paired icon/text // with allow-overlap: false. @@ -339,18 +457,38 @@ void Placement::updateBucketOpacities(SymbolBucket& bucket, std::set<uint32_t>& if (symbolInstance.hasText) { auto opacityVertex = SymbolSDFTextProgram::opacityVertex(opacityState.text.placed, opacityState.text.opacity); - for (size_t i = 0; i < symbolInstance.horizontalGlyphQuads.size() * 4; i++) { - bucket.text.opacityVertices.emplace_back(opacityVertex); + if (symbolInstance.placedRightTextIndex) { + for (size_t i = 0; i < symbolInstance.rightJustifiedGlyphQuads.size() * 4; i++) { + bucket.text.opacityVertices.emplace_back(opacityVertex); + } + PlacedSymbol& placed = bucket.text.placedSymbols[*symbolInstance.placedRightTextIndex]; + placed.hidden = opacityState.isHidden(); } - for (size_t i = 0; i < symbolInstance.verticalGlyphQuads.size() * 4; i++) { - bucket.text.opacityVertices.emplace_back(opacityVertex); + if (symbolInstance.placedCenterTextIndex && !symbolInstance.singleLine) { + for (size_t i = 0; i < symbolInstance.centerJustifiedGlyphQuads.size() * 4; i++) { + bucket.text.opacityVertices.emplace_back(opacityVertex); + } + PlacedSymbol& placed = bucket.text.placedSymbols[*symbolInstance.placedCenterTextIndex]; + placed.hidden = opacityState.isHidden(); } - if (symbolInstance.placedTextIndex) { - bucket.text.placedSymbols[*symbolInstance.placedTextIndex].hidden = opacityState.isHidden(); + if (symbolInstance.placedLeftTextIndex && !symbolInstance.singleLine) { + for (size_t i = 0; i < symbolInstance.leftJustifiedGlyphQuads.size() * 4; i++) { + bucket.text.opacityVertices.emplace_back(opacityVertex); + } + PlacedSymbol& placed = bucket.text.placedSymbols[*symbolInstance.placedLeftTextIndex]; + placed.hidden = opacityState.isHidden(); } if (symbolInstance.placedVerticalTextIndex) { + for (size_t i = 0; i < symbolInstance.verticalGlyphQuads.size() * 4; i++) { + bucket.text.opacityVertices.emplace_back(opacityVertex); + } bucket.text.placedSymbols[*symbolInstance.placedVerticalTextIndex].hidden = opacityState.isHidden(); } + + auto prevOffset = variableOffsets.find(symbolInstance.crossTileID); + if (prevOffset != variableOffsets.end()) { + markUsedJustification(bucket, prevOffset->second.anchor, symbolInstance); + } } if (symbolInstance.hasIcon) { auto opacityVertex = SymbolIconProgram::opacityVertex(opacityState.icon.placed, opacityState.icon.opacity); @@ -369,7 +507,42 @@ void Placement::updateBucketOpacities(SymbolBucket& bucket, std::set<uint32_t>& if (feature.alongLine) { return; } - auto dynamicVertex = CollisionBoxProgram::dynamicVertex(placed, false); + auto dynamicVertex = CollisionBoxProgram::dynamicVertex(placed, false, {}); + for (size_t i = 0; i < feature.boxes.size() * 4; i++) { + bucket.collisionBox.dynamicVertices.emplace_back(dynamicVertex); + } + }; + + auto updateCollisionTextBox = [this, &bucket, &symbolInstance, variablePlacement, rotateWithMap, pitchWithMap](const auto& feature, const bool placed) { + if (feature.alongLine) { + return; + } + Point<float> shift; + bool used = true; + if (variablePlacement) { + auto foundOffset = variableOffsets.find(symbolInstance.crossTileID); + if (foundOffset != variableOffsets.end()) { + const VariableOffset& variableOffset = foundOffset->second; + // This will show either the currently placed position or the last + // successfully placed position (so you can visualize what collision + // just made the symbol disappear, and the most likely place for the + // symbol to come back) + shift = calculateVariableLayoutOffset(variableOffset.anchor, + variableOffset.width, + variableOffset.height, + variableOffset.radialOffset, + variableOffset.textBoxScale); + if (rotateWithMap) { + shift = util::rotate(shift, pitchWithMap ? state.getBearing() : -state.getBearing()); + } + } else { + // No offset -> this symbol hasn't been placed since coming on-screen + // No single box is particularly meaningful and all of them would be too noisy + // Use the center box just to show something's there, but mark it "not used" + used = false; + } + } + auto dynamicVertex = CollisionBoxProgram::dynamicVertex(placed, !used, shift); for (size_t i = 0; i < feature.boxes.size() * 4; i++) { bucket.collisionBox.dynamicVertices.emplace_back(dynamicVertex); } @@ -380,7 +553,7 @@ void Placement::updateBucketOpacities(SymbolBucket& bucket, std::set<uint32_t>& return; } for (const CollisionBox& box : feature.boxes) { - auto dynamicVertex = CollisionBoxProgram::dynamicVertex(placed, !box.used); + auto dynamicVertex = CollisionBoxProgram::dynamicVertex(placed, !box.used, {}); bucket.collisionCircle.dynamicVertices.emplace_back(dynamicVertex); bucket.collisionCircle.dynamicVertices.emplace_back(dynamicVertex); bucket.collisionCircle.dynamicVertices.emplace_back(dynamicVertex); @@ -389,7 +562,7 @@ void Placement::updateBucketOpacities(SymbolBucket& bucket, std::set<uint32_t>& }; if (bucket.hasCollisionBoxData()) { - updateCollisionBox(symbolInstance.textCollisionFeature, opacityState.text.placed); + updateCollisionTextBox(symbolInstance.textCollisionFeature, opacityState.text.placed); updateCollisionBox(symbolInstance.iconCollisionFeature, opacityState.icon.placed); } if (bucket.hasCollisionCircleData()) { @@ -406,6 +579,31 @@ void Placement::updateBucketOpacities(SymbolBucket& bucket, std::set<uint32_t>& } } +void Placement::markUsedJustification(SymbolBucket& bucket, style::TextVariableAnchorType placedAnchor, SymbolInstance& symbolInstance) { + std::map<style::TextJustifyType, optional<size_t>> justificationToIndex { + {style::TextJustifyType::Right, symbolInstance.placedRightTextIndex}, + {style::TextJustifyType::Center, symbolInstance.placedCenterTextIndex}, + {style::TextJustifyType::Left, symbolInstance.placedLeftTextIndex}, + }; + style::TextJustifyType justify = getAnchorJustification(placedAnchor); + assert(justify == style::TextJustifyType::Right || justify == style::TextJustifyType::Center || justify == style::TextJustifyType::Left); + const optional<size_t> autoIndex = justificationToIndex[justify]; + + for (auto& pair : justificationToIndex) { + const optional<size_t> index = pair.second; + if (index) { + assert(bucket.text.placedSymbols.size() > *index); + if (autoIndex && *index != *autoIndex) { + // There are multiple justifications and this one isn't it: shift offscreen + bucket.text.placedSymbols.at(*index).crossTileID = 0u; + } else { + // Either this is the chosen justification or the justification is hardwired: use this one + bucket.text.placedSymbols.at(*index).crossTileID = symbolInstance.crossTileID; + } + } + } +} + float Placement::symbolFadeChange(TimePoint now) const { if (mapMode == MapMode::Continuous && transitionOptions.enablePlacementTransitions && transitionOptions.duration.value_or(util::DEFAULT_TRANSITION_DURATION) > Milliseconds(0)) { |