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#include <mbgl/text/placement.hpp>
#include <mbgl/renderer/render_layer.hpp>
#include <mbgl/renderer/layers/render_symbol_layer.hpp>
#include <mbgl/renderer/render_tile.hpp>
#include <mbgl/tile/geometry_tile.cpp>
#include <mbgl/renderer/buckets/symbol_bucket.hpp>
#include <mbgl/renderer/bucket.hpp>
namespace mbgl {
OpacityState::OpacityState(float targetOpacity_) : opacity(0), targetOpacity(targetOpacity_) {}
OpacityState::OpacityState(OpacityState& prevState, float increment, float targetOpacity) :
opacity(std::fmax(0, std::fmin(1, prevState.opacity + prevState.targetOpacity == 1.0 ? increment : -increment))),
targetOpacity(targetOpacity) {}
bool OpacityState::isHidden() const {
return opacity == 0 && targetOpacity == 0;
}
JointOpacityState::JointOpacityState(float iconOpacity_, float textOpacity_) :
icon(OpacityState(iconOpacity_)),
text(OpacityState(textOpacity_)) {}
JointOpacityState::JointOpacityState(JointOpacityState& prevOpacityState, float increment, float iconOpacity, float textOpacity) :
icon(OpacityState(prevOpacityState.icon, increment, iconOpacity)),
text(OpacityState(prevOpacityState.text, increment, textOpacity)) {}
Placement::Placement(const TransformState& state_) : collisionIndex(state_), state(state_) {}
void Placement::placeLayer(RenderSymbolLayer& symbolLayer, bool showCollisionBoxes) {
for (RenderTile& renderTile : symbolLayer.renderTiles) {
if (!renderTile.tile.isRenderable()) {
continue;
}
auto bucket = renderTile.tile.getBucket(*symbolLayer.baseImpl);
assert(dynamic_cast<SymbolBucket*>(bucket));
SymbolBucket& symbolBucket = *reinterpret_cast<SymbolBucket*>(bucket);
auto& layout = symbolBucket.layout;
const float pixelsToTileUnits = renderTile.id.pixelsToTileUnits(1, state.getZoom());
const float scale = std::pow(2, state.getZoom() - renderTile.id.canonical.z);
mat4 textLabelPlaneMatrix = getLabelPlaneMatrix(renderTile.matrix,
layout.get<TextPitchAlignment>() == style::AlignmentType::Map,
layout.get<TextRotationAlignment>() == style::AlignmentType::Map,
state,
pixelsToTileUnits);
mat4 iconLabelPlaneMatrix = getLabelPlaneMatrix(renderTile.matrix,
layout.get<IconPitchAlignment>() == style::AlignmentType::Map,
layout.get<IconRotationAlignment>() == style::AlignmentType::Map,
state,
pixelsToTileUnits);
placeLayerBucket(symbolLayer, symbolBucket, renderTile.matrix, textLabelPlaneMatrix, iconLabelPlaneMatrix, scale, showCollisionBoxes);
}
}
void Placement::placeLayerBucket(
RenderSymbolLayer&,
SymbolBucket& bucket,
const mat4& posMatrix,
const mat4& textLabelPlaneMatrix,
const mat4& iconLabelPlaneMatrix,
const float scale,
const bool showCollisionBoxes) {
//assert(dynamic_cast<const SymbolLayer::Impl*>(&*symbolLayer.baseImpl));
//const auto& impl = static_cast<const style::SymbolLayer::Impl&>(*symbolLayer.baseImpl);
// TODO collision debug array clearing
auto partiallyEvaluatedTextSize = bucket.textSizeBinder->evaluateForZoom(state.getZoom());
auto partiallyEvaluatedIconSize = bucket.iconSizeBinder->evaluateForZoom(state.getZoom());
const bool iconWithoutText = !bucket.hasTextData() || bucket.layout.get<TextOptional>();
const bool textWithoutIcon = !bucket.hasIconData() || bucket.layout.get<IconOptional>();
float pixelRatio = util::EXTENT / util::tileSize;
for (auto& symbolInstance : bucket.symbolInstances) {
bool placeText = false;
bool placeIcon = false;
if (!symbolInstance.isDuplicate) {
if (symbolInstance.placedTextIndices.size()) {
assert(symbolInstance.placedTextIndices.size() != 0);
PlacedSymbol& placedSymbol = bucket.text.placedSymbols.at(symbolInstance.placedTextIndices.at(0));
const float fontSize = evaluateSizeForFeature(partiallyEvaluatedTextSize, placedSymbol);
placeText = collisionIndex.placeFeature(symbolInstance.textCollisionFeature,
posMatrix, textLabelPlaneMatrix, pixelRatio,
placedSymbol,scale, fontSize,
bucket.layout.get<TextAllowOverlap>(),
bucket.layout.get<TextPitchAlignment>() == style::AlignmentType::Map,
showCollisionBoxes);
}
if (symbolInstance.placedIconIndices.size()) {
PlacedSymbol& placedSymbol = bucket.icon.placedSymbols.at(symbolInstance.placedIconIndices.at(0));
const float fontSize = evaluateSizeForFeature(partiallyEvaluatedIconSize, placedSymbol);
placeIcon = collisionIndex.placeFeature(symbolInstance.iconCollisionFeature,
posMatrix, iconLabelPlaneMatrix, pixelRatio,
placedSymbol, scale, fontSize,
bucket.layout.get<IconAllowOverlap>(),
bucket.layout.get<IconPitchAlignment>() == style::AlignmentType::Map,
showCollisionBoxes);
}
// combine placements for icon and text
if (!iconWithoutText && !textWithoutIcon) {
placeText = placeIcon = placeText && placeIcon;
} else if (!textWithoutIcon) {
placeText = placeText && placeIcon;
} else if (!iconWithoutText) {
placeIcon = placeText && placeIcon;
}
if (placeText) {
collisionIndex.insertFeature(symbolInstance.textCollisionFeature, bucket.layout.get<TextIgnorePlacement>());
}
if (placeIcon) {
collisionIndex.insertFeature(symbolInstance.iconCollisionFeature, bucket.layout.get<IconIgnorePlacement>());
}
if (symbolInstance.crossTileID == 0) {
// TODO properly assign these
symbolInstance.crossTileID = ++maxCrossTileID;
}
placements.emplace(symbolInstance.crossTileID, PlacementPair(placeText, placeIcon));
}
}
}
void Placement::commit(std::unique_ptr<Placement> prevPlacement, TimePoint now) {
commitTime = now;
if (!prevPlacement) {
// First time doing placement. Fade in all labels from 0.
for (auto& placementPair : placements) {
opacities.emplace(placementPair.first, JointOpacityState(placementPair.second.icon, placementPair.second.text));
}
} else {
const Duration symbolFadeDuration(300);
float increment = (commitTime - prevPlacement->commitTime) / symbolFadeDuration;
// add the opacities from the current placement, and copy their current values from the previous placement
for (auto& placementPair : placements) {
auto prevOpacity = prevPlacement->opacities.find(placementPair.first);
if (prevOpacity != prevPlacement->opacities.end()) {
opacities.emplace(placementPair.first, JointOpacityState(prevOpacity->second, increment, placementPair.second.icon, placementPair.second.text));
} else {
opacities.emplace(placementPair.first, JointOpacityState(placementPair.second.icon, placementPair.second.text));
}
}
// 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) {
if (opacities.find(prevOpacity.first) != opacities.end()) {
JointOpacityState jointOpacity(prevOpacity.second, increment, 0, 0);
if (jointOpacity.icon.opacity != jointOpacity.icon.targetOpacity ||
jointOpacity.text.opacity != jointOpacity.text.targetOpacity) {
opacities.emplace(prevOpacity.first, jointOpacity);
}
}
}
}
}
void Placement::updateLayerOpacities(RenderSymbolLayer& symbolLayer, gl::Context& context) {
for (RenderTile& renderTile : symbolLayer.renderTiles) {
if (!renderTile.tile.isRenderable()) {
continue;
}
auto bucket = renderTile.tile.getBucket(*symbolLayer.baseImpl);
assert(dynamic_cast<SymbolBucket*>(bucket));
SymbolBucket& symbolBucket = *reinterpret_cast<SymbolBucket*>(bucket);
updateBucketOpacities(symbolBucket, context);
}
}
void Placement::updateBucketOpacities(SymbolBucket& bucket, gl::Context& context) {
// TODO check if this clear is necessary, whether the vector has been moved out
if (bucket.hasTextData()) bucket.text.opacityVertices.clear();
if (bucket.hasIconData()) bucket.icon.opacityVertices.clear();
for (SymbolInstance& symbolInstance : bucket.symbolInstances) {
auto opacityState = getOpacity(symbolInstance.crossTileID);
// TODO check if hasText is the right thing here, or if there are cases where hasText is true but it's not added to the buffers
if (symbolInstance.hasText) {
// TODO mark PlacedSymbols as hidden so that they don't need to be projected at render time
auto opacityVertex = SymbolOpacityAttributes::vertex(opacityState.text.targetOpacity, opacityState.text.opacity);
for (size_t i = 0; i < symbolInstance.glyphQuads.size() * 4; i++) {
bucket.text.opacityVertices.emplace_back(opacityVertex);
}
}
if (symbolInstance.hasIcon) {
// TODO mark PlacedSymbols as hidden so that they don't need to be projected at render time
auto opacityVertex = SymbolOpacityAttributes::vertex(opacityState.icon.targetOpacity, opacityState.icon.opacity);
if (symbolInstance.iconQuad) {
bucket.icon.opacityVertices.emplace_back(opacityVertex);
bucket.icon.opacityVertices.emplace_back(opacityVertex);
bucket.icon.opacityVertices.emplace_back(opacityVertex);
bucket.icon.opacityVertices.emplace_back(opacityVertex);
}
}
}
if (bucket.hasTextData()) context.updateVertexBuffer(*bucket.text.opacityVertexBuffer, std::move(bucket.text.opacityVertices));
if (bucket.hasIconData()) context.updateVertexBuffer(*bucket.icon.opacityVertexBuffer, std::move(bucket.icon.opacityVertices));
}
JointOpacityState Placement::getOpacity(uint32_t crossTileSymbolID) const {
auto it = opacities.find(crossTileSymbolID);
if (it != opacities.end()) {
return it->second;
} else {
return JointOpacityState(0, 0);
}
}
} // namespace mbgl
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