TEST(Buckets, SymbolBucket) {
HeadlessBackend backend({ 512, 256 });
BackendScope scope { backend };
style::SymbolLayoutProperties::PossiblyEvaluated layout;
bool sdfIcons = false;
bool iconsNeedLinear = false;
bool sortFeaturesByY = false;
std::vector<SymbolInstance> symbolInstances;
gl::Context context;
SymbolBucket bucket { layout, {}, 16.0f, 1.0f, 0, sdfIcons, iconsNeedLinear, sortFeaturesByY, std::move(symbolInstances) };
ASSERT_FALSE(bucket.hasIconData());
ASSERT_FALSE(bucket.hasTextData());
ASSERT_FALSE(bucket.hasCollisionBoxData());
ASSERT_FALSE(bucket.hasData());
ASSERT_FALSE(bucket.needsUpload());
// SymbolBucket::addFeature() is a no-op.
GeometryCollection point { { { 0, 0 } } };
bucket.addFeature(StubGeometryTileFeature { {}, FeatureType::Point, point, properties }, point);
ASSERT_FALSE(bucket.hasData());
ASSERT_FALSE(bucket.needsUpload());
bucket.text.segments.emplace_back(0, 0);
ASSERT_TRUE(bucket.hasTextData());
ASSERT_TRUE(bucket.hasData());
ASSERT_TRUE(bucket.needsUpload());
bucket.upload(context);
ASSERT_FALSE(bucket.needsUpload());
}
void Painter::renderSymbol(SymbolBucket &bucket, std::shared_ptr<StyleLayer> layer_desc, const Tile::ID &id, const mat4 &matrix) {
// Abort early.
if (pass == RenderPass::Opaque) {
return;
}
const SymbolProperties &properties = layer_desc->getProperties<SymbolProperties>();
glDisable(GL_STENCIL_TEST);
if (bucket.hasTextData()) {
GlyphAtlas &glyphAtlas = *map.getGlyphAtlas();
glyphAtlas.bind();
renderSDF(bucket,
id,
matrix,
bucket.properties.text,
properties.text,
24.0f,
{{ float(glyphAtlas.width) / 4, float(glyphAtlas.height) / 4 }},
*sdfGlyphShader,
&SymbolBucket::drawGlyphs);
}
if (bucket.hasIconData()) {
bool sdf = bucket.sdfIcons;
const float angleOffset =
bucket.properties.icon.rotation_alignment == RotationAlignmentType::Map
? map.getState().getAngle()
: 0;
// If layerStyle.size > bucket.info.fontSize then labels may collide
const float fontSize = properties.icon.size != 0 ? properties.icon.size : bucket.properties.icon.max_size;
const float fontScale = fontSize / 1.0f;
SpriteAtlas &spriteAtlas = *map.getSpriteAtlas();
spriteAtlas.bind(map.getState().isChanging() || bucket.properties.placement == PlacementType::Line || angleOffset != 0 || fontScale != 1 || sdf);
std::array<float, 2> texsize = {{
float(spriteAtlas.getWidth()),
float(spriteAtlas.getHeight())
}
};
if (sdf) {
renderSDF(bucket,
id,
matrix,
bucket.properties.icon,
properties.icon,
1.0f,
texsize,
*sdfIconShader,
&SymbolBucket::drawIcons);
} else {
mat4 vtxMatrix = translatedMatrix(matrix, properties.icon.translate, id, properties.icon.translate_anchor);
mat4 exMatrix;
matrix::copy(exMatrix, projMatrix);
if (angleOffset) {
matrix::rotate_z(exMatrix, exMatrix, angleOffset);
}
matrix::scale(exMatrix, exMatrix, fontScale, fontScale, 1.0f);
useProgram(iconShader->program);
iconShader->u_matrix = vtxMatrix;
iconShader->u_exmatrix = exMatrix;
iconShader->u_texsize = texsize;
// Convert the -pi..pi to an int8 range.
const float angle = std::round(map.getState().getAngle() / M_PI * 128);
// adjust min/max zooms for variable font sies
float zoomAdjust = std::log(fontSize / bucket.properties.icon.max_size) / std::log(2);
iconShader->u_angle = (int32_t)(angle + 256) % 256;
iconShader->u_flip = bucket.properties.placement == PlacementType::Line ? 1 : 0;
iconShader->u_zoom = (map.getState().getNormalizedZoom() - zoomAdjust) * 10; // current zoom level
iconShader->u_fadedist = 0 * 10;
iconShader->u_minfadezoom = map.getState().getNormalizedZoom() * 10;
iconShader->u_maxfadezoom = map.getState().getNormalizedZoom() * 10;
iconShader->u_fadezoom = map.getState().getNormalizedZoom() * 10;
iconShader->u_opacity = properties.icon.opacity;
depthRange(strata, 1.0f);
bucket.drawIcons(*iconShader);
}
}
glEnable(GL_STENCIL_TEST);
}
void Painter::renderSymbol(SymbolBucket &bucket, const StyleLayer &layer_desc, const TileID &id, const mat4 &matrix) {
// Abort early.
if (pass == RenderPass::Opaque) {
return;
}
const auto &properties = layer_desc.getProperties<SymbolProperties>();
const auto &layout = bucket.layout;
config.depthTest = true;
config.depthMask = GL_FALSE;
if (bucket.hasCollisionBoxData() && (
(bucket.hasIconData() && properties.icon.opacity) ||
(bucket.hasTextData() && properties.text.opacity))) {
config.stencilTest = true;
useProgram(collisionBoxShader->program);
collisionBoxShader->u_matrix = matrix;
collisionBoxShader->u_scale = std::pow(2, state.getNormalizedZoom() - id.z);
collisionBoxShader->u_zoom = state.getNormalizedZoom() * 10;
collisionBoxShader->u_maxzoom = (id.z + 1) * 10;
lineWidth(3.0f);
config.depthRange = { strata, 1.0f };
bucket.drawCollisionBoxes(*collisionBoxShader);
}
// TODO remove the `|| true` when #1673 is implemented
const bool drawAcrossEdges = !(layout.text.allow_overlap || layout.icon.allow_overlap ||
layout.text.ignore_placement || layout.icon.ignore_placement) || true;
// Disable the stencil test so that labels aren't clipped to tile boundaries.
//
// Layers with features that may be drawn overlapping aren't clipped. These
// layers are sorted in the y direction, and to draw the correct ordering near
// tile edges the icons are included in both tiles and clipped when drawing.
config.stencilTest = drawAcrossEdges ? false : true;
if (bucket.hasIconData()) {
bool sdf = bucket.sdfIcons;
const float angleOffset =
layout.icon.rotation_alignment == RotationAlignmentType::Map
? state.getAngle()
: 0;
// If layerStyle.size > bucket.info.fontSize then labels may collide
const float fontSize = properties.icon.size != 0 ? properties.icon.size : layout.icon.max_size;
const float fontScale = fontSize / 1.0f;
spriteAtlas->bind(state.isChanging() || layout.placement == PlacementType::Line || angleOffset != 0 || fontScale != 1 || sdf);
if (sdf) {
renderSDF(bucket,
id,
matrix,
layout.icon,
properties.icon,
1.0f,
{{ float(spriteAtlas->getWidth()) / 4.0f, float(spriteAtlas->getHeight()) / 4.0f }},
*sdfIconShader,
&SymbolBucket::drawIcons);
} else {
mat4 vtxMatrix = translatedMatrix(matrix, properties.icon.translate, id, properties.icon.translate_anchor);
mat4 exMatrix;
matrix::copy(exMatrix, projMatrix);
if (angleOffset) {
matrix::rotate_z(exMatrix, exMatrix, angleOffset);
}
matrix::scale(exMatrix, exMatrix, fontScale, fontScale, 1.0f);
useProgram(iconShader->program);
iconShader->u_matrix = vtxMatrix;
iconShader->u_exmatrix = exMatrix;
iconShader->u_texsize = {{ float(spriteAtlas->getWidth()) / 4.0f, float(spriteAtlas->getHeight()) / 4.0f }};
// adjust min/max zooms for variable font sies
float zoomAdjust = std::log(fontSize / layout.icon.max_size) / std::log(2);
iconShader->u_zoom = (state.getNormalizedZoom() - zoomAdjust) * 10; // current zoom level
iconShader->u_fadedist = 0 * 10;
iconShader->u_minfadezoom = state.getNormalizedZoom() * 10;
iconShader->u_maxfadezoom = state.getNormalizedZoom() * 10;
iconShader->u_fadezoom = state.getNormalizedZoom() * 10;
iconShader->u_opacity = properties.icon.opacity;
config.depthRange = { strata, 1.0f };
bucket.drawIcons(*iconShader);
}
}
if (bucket.hasTextData()) {
glyphAtlas->bind();
renderSDF(bucket,
id,
matrix,
layout.text,
properties.text,
24.0f,
{{ float(glyphAtlas->width) / 4, float(glyphAtlas->height) / 4 }},
*sdfGlyphShader,
&SymbolBucket::drawGlyphs);
}
}
void Painter::renderSymbol(SymbolBucket& bucket, const SymbolLayer& layer, const TileID& id, const mat4& matrix) {
// Abort early.
if (pass == RenderPass::Opaque) {
return;
}
const auto& properties = layer.paint;
const auto& layout = bucket.layout;
config.depthMask = GL_FALSE;
if (bucket.hasCollisionBoxData()) {
config.stencilOp.reset();
config.stencilTest = GL_TRUE;
config.program = collisionBoxShader->program;
collisionBoxShader->u_matrix = matrix;
collisionBoxShader->u_scale = std::pow(2, state.getNormalizedZoom() - id.z);
collisionBoxShader->u_zoom = state.getNormalizedZoom() * 10;
collisionBoxShader->u_maxzoom = (id.z + 1) * 10;
config.lineWidth = 1.0f;
setDepthSublayer(0);
bucket.drawCollisionBoxes(*collisionBoxShader);
}
// TODO remove the `true ||` when #1673 is implemented
const bool drawAcrossEdges = true || !(layout.text.allowOverlap || layout.icon.allowOverlap ||
layout.text.ignorePlacement || layout.icon.ignorePlacement);
// Disable the stencil test so that labels aren't clipped to tile boundaries.
//
// Layers with features that may be drawn overlapping aren't clipped. These
// layers are sorted in the y direction, and to draw the correct ordering near
// tile edges the icons are included in both tiles and clipped when drawing.
if (drawAcrossEdges) {
config.stencilTest = GL_FALSE;
} else {
config.stencilOp.reset();
config.stencilTest = GL_TRUE;
}
if (bucket.hasIconData()) {
if (layout.icon.rotationAlignment == RotationAlignmentType::Map) {
config.depthFunc.reset();
config.depthTest = GL_TRUE;
} else {
config.depthTest = GL_FALSE;
}
bool sdf = bucket.sdfIcons;
const float angleOffset =
layout.icon.rotationAlignment == RotationAlignmentType::Map
? state.getAngle()
: 0;
const float fontSize = properties.icon.size;
const float fontScale = fontSize / 1.0f;
SpriteAtlas* activeSpriteAtlas = layer.spriteAtlas;
activeSpriteAtlas->bind(state.isChanging() || layout.placement == PlacementType::Line
|| angleOffset != 0 || fontScale != 1 || sdf || state.getPitch() != 0);
if (sdf) {
renderSDF(bucket,
id,
matrix,
layout.icon,
properties.icon,
1.0f,
{{ float(activeSpriteAtlas->getWidth()) / 4.0f, float(activeSpriteAtlas->getHeight()) / 4.0f }},
*sdfIconShader,
&SymbolBucket::drawIcons);
} else {
mat4 vtxMatrix = translatedMatrix(matrix, properties.icon.translate, id, properties.icon.translateAnchor);
bool skewed = layout.icon.rotationAlignment == RotationAlignmentType::Map;
mat4 exMatrix;
float s;
if (skewed) {
matrix::identity(exMatrix);
s = 4096.0f / util::tileSize / id.overscaling / std::pow(2, state.getZoom() - id.z);
} else {
exMatrix = extrudeMatrix;
s = state.getAltitude();
}
matrix::scale(exMatrix, exMatrix, s, s, 1);
matrix::scale(exMatrix, exMatrix, fontScale, fontScale, 1.0f);
// calculate how much longer the real world distance is at the top of the screen
// than at the middle of the screen.
float topedgelength = std::sqrt(std::pow(state.getHeight(), 2) / 4.0f * (1.0f + std::pow(state.getAltitude(), 2)));
float x = state.getHeight() / 2.0f * std::tan(state.getPitch());
float extra = (topedgelength + x) / topedgelength - 1;
config.program = iconShader->program;
iconShader->u_matrix = vtxMatrix;
iconShader->u_exmatrix = exMatrix;
iconShader->u_texsize = {{ float(spriteAtlas->getWidth()) / 4.0f, float(spriteAtlas->getHeight()) / 4.0f }};
iconShader->u_skewed = skewed;
iconShader->u_extra = extra;
// adjust min/max zooms for variable font sies
float zoomAdjust = std::log(fontSize / layout.icon.size) / std::log(2);
iconShader->u_zoom = (state.getNormalizedZoom() - zoomAdjust) * 10; // current zoom level
iconShader->u_fadedist = 0 * 10;
iconShader->u_minfadezoom = state.getNormalizedZoom() * 10;
iconShader->u_maxfadezoom = state.getNormalizedZoom() * 10;
iconShader->u_fadezoom = state.getNormalizedZoom() * 10;
iconShader->u_opacity = properties.icon.opacity;
setDepthSublayer(0);
bucket.drawIcons(*iconShader);
}
}
if (bucket.hasTextData()) {
if (layout.text.rotationAlignment == RotationAlignmentType::Map) {
config.depthFunc.reset();
config.depthTest = GL_TRUE;
} else {
config.depthTest = GL_FALSE;
}
glyphAtlas->bind();
renderSDF(bucket,
id,
matrix,
layout.text,
properties.text,
24.0f,
{{ float(glyphAtlas->width) / 4, float(glyphAtlas->height) / 4 }},
*sdfGlyphShader,
&SymbolBucket::drawGlyphs);
}
}
void Painter::renderSymbol(PaintParameters& parameters,
SymbolBucket& bucket,
const SymbolLayer& layer,
const RenderTile& tile) {
// Abort early.
if (pass == RenderPass::Opaque) {
return;
}
const auto& paint = layer.impl->paint;
const auto& layout = bucket.layout;
config.depthMask = GL_FALSE;
// TODO remove the `true ||` when #1673 is implemented
const bool drawAcrossEdges = (frame.mapMode == MapMode::Continuous) && (true || !(layout.textAllowOverlap || layout.iconAllowOverlap ||
layout.textIgnorePlacement || layout.iconIgnorePlacement));
// Disable the stencil test so that labels aren't clipped to tile boundaries.
//
// Layers with features that may be drawn overlapping aren't clipped. These
// layers are sorted in the y direction, and to draw the correct ordering near
// tile edges the icons are included in both tiles and clipped when drawing.
if (drawAcrossEdges) {
config.stencilTest = GL_FALSE;
} else {
config.stencilOp.reset();
config.stencilTest = GL_TRUE;
}
if (bucket.hasIconData()) {
if (layout.iconRotationAlignment == AlignmentType::Map) {
config.depthFunc.reset();
config.depthTest = GL_TRUE;
} else {
config.depthTest = GL_FALSE;
}
bool sdf = bucket.sdfIcons;
const float angleOffset =
layout.iconRotationAlignment == AlignmentType::Map
? state.getAngle()
: 0;
const float fontSize = layer.impl->iconSize;
const float fontScale = fontSize / 1.0f;
SpriteAtlas* activeSpriteAtlas = layer.impl->spriteAtlas;
const bool iconScaled = fontScale != 1 || frame.pixelRatio != activeSpriteAtlas->getPixelRatio() || bucket.iconsNeedLinear;
const bool iconTransformed = layout.iconRotationAlignment == AlignmentType::Map || angleOffset != 0 || state.getPitch() != 0;
activeSpriteAtlas->bind(sdf || state.isChanging() || iconScaled || iconTransformed, store, config, 0);
if (sdf) {
renderSDF(bucket,
tile,
1.0f,
{{ float(activeSpriteAtlas->getWidth()) / 4.0f, float(activeSpriteAtlas->getHeight()) / 4.0f }},
parameters.shaders.sdfIcon,
&SymbolBucket::drawIcons,
layout.iconRotationAlignment,
// icon-pitch-alignment is not yet implemented
// and we simply inherit the rotation alignment
layout.iconRotationAlignment,
layout.iconSize,
paint.iconOpacity,
paint.iconColor,
paint.iconHaloColor,
paint.iconHaloWidth,
paint.iconHaloBlur,
paint.iconTranslate,
paint.iconTranslateAnchor,
layer.impl->iconSize);
} else {
mat4 vtxMatrix = tile.translatedMatrix(paint.iconTranslate,
paint.iconTranslateAnchor,
state);
std::array<float, 2> extrudeScale;
const bool alignedWithMap = layout.iconRotationAlignment == AlignmentType::Map;
if (alignedWithMap) {
extrudeScale.fill(tile.id.pixelsToTileUnits(1, state.getZoom()) * fontScale);
} else {
extrudeScale = {{
pixelsToGLUnits[0] * fontScale * state.getAltitude(),
pixelsToGLUnits[1] * fontScale * state.getAltitude()
}};
}
auto& iconShader = parameters.shaders.icon;
config.program = iconShader.getID();
iconShader.u_matrix = vtxMatrix;
iconShader.u_extrude_scale = extrudeScale;
iconShader.u_texsize = {{ float(activeSpriteAtlas->getWidth()) / 4.0f, float(activeSpriteAtlas->getHeight()) / 4.0f }};
iconShader.u_rotate_with_map = alignedWithMap;
iconShader.u_texture = 0;
// adjust min/max zooms for variable font sies
float zoomAdjust = std::log(fontSize / layout.iconSize) / std::log(2);
iconShader.u_zoom = (state.getZoom() - zoomAdjust) * 10; // current zoom level
iconShader.u_opacity = paint.iconOpacity;
frameHistory.bind(store, config, 1);
iconShader.u_fadetexture = 1;
setDepthSublayer(0);
bucket.drawIcons(iconShader, store, isOverdraw());
}
}
if (bucket.hasTextData()) {
if (layout.textRotationAlignment == AlignmentType::Map) {
config.depthFunc.reset();
config.depthTest = GL_TRUE;
} else {
config.depthTest = GL_FALSE;
}
glyphAtlas->bind(store, config, 0);
renderSDF(bucket,
tile,
24.0f,
{{ float(glyphAtlas->width) / 4, float(glyphAtlas->height) / 4 }},
parameters.shaders.sdfGlyph,
&SymbolBucket::drawGlyphs,
layout.textRotationAlignment,
layout.textPitchAlignment,
layout.textSize,
paint.textOpacity,
paint.textColor,
paint.textHaloColor,
paint.textHaloWidth,
paint.textHaloBlur,
paint.textTranslate,
paint.textTranslateAnchor,
layer.impl->textSize);
}
if (bucket.hasCollisionBoxData()) {
config.stencilOp.reset();
config.stencilTest = GL_TRUE;
auto& collisionBoxShader = shaders->collisionBox;
config.program = collisionBoxShader.getID();
collisionBoxShader.u_matrix = tile.matrix;
// TODO: This was the overscaled z instead of the canonical z.
collisionBoxShader.u_scale = std::pow(2, state.getZoom() - tile.id.canonical.z);
collisionBoxShader.u_zoom = state.getZoom() * 10;
collisionBoxShader.u_maxzoom = (tile.id.canonical.z + 1) * 10;
config.lineWidth = 1.0f;
setDepthSublayer(0);
bucket.drawCollisionBoxes(collisionBoxShader, store);
}
}
void Placement::updateBucketOpacities(SymbolBucket& bucket, std::set<uint32_t>& seenCrossTileIDs) {
if (bucket.hasTextData()) bucket.text.opacityVertices.clear();
if (bucket.hasIconData()) bucket.icon.opacityVertices.clear();
if (bucket.hasCollisionBoxData()) bucket.collisionBox.dynamicVertices.clear();
if (bucket.hasCollisionCircleData()) bucket.collisionCircle.dynamicVertices.clear();
JointOpacityState duplicateOpacityState(false, false, true);
const bool textAllowOverlap = bucket.layout.get<style::TextAllowOverlap>();
const bool iconAllowOverlap = bucket.layout.get<style::IconAllowOverlap>();
// 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.
// See https://github.com/mapbox/mapbox-gl-native/issues/12483
JointOpacityState defaultOpacityState(
textAllowOverlap && (iconAllowOverlap || !bucket.hasIconData() || bucket.layout.get<style::IconOptional>()),
iconAllowOverlap && (textAllowOverlap || !bucket.hasTextData() || bucket.layout.get<style::TextOptional>()),
true);
for (SymbolInstance& symbolInstance : bucket.symbolInstances) {
bool isDuplicate = seenCrossTileIDs.count(symbolInstance.crossTileID) > 0;
auto it = opacities.find(symbolInstance.crossTileID);
auto opacityState = defaultOpacityState;
if (isDuplicate) {
opacityState = duplicateOpacityState;
} else if (it != opacities.end()) {
opacityState = it->second;
}
if (it == opacities.end()) {
opacities.emplace(symbolInstance.crossTileID, defaultOpacityState);
}
seenCrossTileIDs.insert(symbolInstance.crossTileID);
if (symbolInstance.hasText) {
auto opacityVertex = SymbolOpacityAttributes::vertex(opacityState.text.placed, opacityState.text.opacity);
for (size_t i = 0; i < symbolInstance.horizontalGlyphQuads.size() * 4; i++) {
bucket.text.opacityVertices.emplace_back(opacityVertex);
}
for (size_t i = 0; i < symbolInstance.verticalGlyphQuads.size() * 4; i++) {
bucket.text.opacityVertices.emplace_back(opacityVertex);
}
if (symbolInstance.placedTextIndex) {
bucket.text.placedSymbols[*symbolInstance.placedTextIndex].hidden = opacityState.isHidden();
}
if (symbolInstance.placedVerticalTextIndex) {
bucket.text.placedSymbols[*symbolInstance.placedVerticalTextIndex].hidden = opacityState.isHidden();
}
}
if (symbolInstance.hasIcon) {
auto opacityVertex = SymbolOpacityAttributes::vertex(opacityState.icon.placed, 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 (symbolInstance.placedIconIndex) {
bucket.icon.placedSymbols[*symbolInstance.placedIconIndex].hidden = opacityState.isHidden();
}
}
auto updateCollisionBox = [&](const auto& feature, const bool placed) {
if (feature.alongLine) {
return;
}
auto dynamicVertex = CollisionBoxDynamicAttributes::vertex(placed, false);
for (size_t i = 0; i < feature.boxes.size() * 4; i++) {
bucket.collisionBox.dynamicVertices.emplace_back(dynamicVertex);
}
};
auto updateCollisionCircles = [&](const auto& feature, const bool placed) {
if (!feature.alongLine) {
return;
}
for (const CollisionBox& box : feature.boxes) {
auto dynamicVertex = CollisionBoxDynamicAttributes::vertex(placed, !box.used);
bucket.collisionCircle.dynamicVertices.emplace_back(dynamicVertex);
bucket.collisionCircle.dynamicVertices.emplace_back(dynamicVertex);
bucket.collisionCircle.dynamicVertices.emplace_back(dynamicVertex);
bucket.collisionCircle.dynamicVertices.emplace_back(dynamicVertex);
}
};
if (bucket.hasCollisionBoxData()) {
updateCollisionBox(symbolInstance.textCollisionFeature, opacityState.text.placed);
updateCollisionBox(symbolInstance.iconCollisionFeature, opacityState.icon.placed);
}
if (bucket.hasCollisionCircleData()) {
updateCollisionCircles(symbolInstance.textCollisionFeature, opacityState.text.placed);
updateCollisionCircles(symbolInstance.iconCollisionFeature, opacityState.icon.placed);
}
}
bucket.updateOpacity();
bucket.sortFeatures(state.getAngle());
auto retainedData = retainedQueryData.find(bucket.bucketInstanceId);
if (retainedData != retainedQueryData.end()) {
retainedData->second.featureSortOrder = bucket.featureSortOrder;
}
}
void Placement::placeLayerBucket(
SymbolBucket& bucket,
const mat4& posMatrix,
const mat4& textLabelPlaneMatrix,
const mat4& iconLabelPlaneMatrix,
const float scale,
const float textPixelRatio,
const bool showCollisionBoxes,
std::unordered_set<uint32_t>& seenCrossTileIDs,
const bool holdingForFade,
const CollisionGroups::CollisionGroup& collisionGroup) {
auto partiallyEvaluatedTextSize = bucket.textSizeBinder->evaluateForZoom(state.getZoom());
auto partiallyEvaluatedIconSize = bucket.iconSizeBinder->evaluateForZoom(state.getZoom());
optional<CollisionTileBoundaries> avoidEdges;
if (mapMode == MapMode::Tile &&
(bucket.layout.get<style::SymbolAvoidEdges>() ||
bucket.layout.get<style::SymbolPlacement>() == style::SymbolPlacementType::Line)) {
avoidEdges = collisionIndex.projectTileBoundaries(posMatrix);
}
const bool textAllowOverlap = bucket.layout.get<style::TextAllowOverlap>();
const bool iconAllowOverlap = bucket.layout.get<style::IconAllowOverlap>();
// This logic is similar to the "defaultOpacityState" logic below in updateBucketOpacities
// If we know a symbol is always supposed to show, force it to be marked visible even if
// it wasn't placed into the collision index (because some or all of it was outside the range
// of the collision grid).
// There is a subtle edge case here we're accepting:
// Symbol A has text-allow-overlap: true, icon-allow-overlap: true, icon-optional: false
// A's icon is outside the grid, so doesn't get placed
// A's text would be inside grid, but doesn't get placed because of icon-optional: false
// We still show A because of the allow-overlap settings.
// Symbol B has allow-overlap: false, and gets placed where A's text would be
// On panning in, there is a short period when Symbol B and Symbol A will overlap
// This is the reverse of our normal policy of "fade in on pan", but should look like any other
// collision and hopefully not be too noticeable.
// 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>());
for (auto& symbolInstance : bucket.symbolInstances) {
if (seenCrossTileIDs.count(symbolInstance.crossTileID) == 0) {
if (holdingForFade) {
// Mark all symbols from this tile as "not placed", but don't add to seenCrossTileIDs, because we don't
// know yet if we have a duplicate in a parent tile that _should_ be placed.
placements.emplace(symbolInstance.crossTileID, JointPlacement(false, false, false));
continue;
}
bool placeText = false;
bool placeIcon = false;
bool offscreen = true;
if (symbolInstance.placedTextIndex) {
PlacedSymbol& placedSymbol = bucket.text.placedSymbols.at(*symbolInstance.placedTextIndex);
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 (symbolInstance.placedIconIndex) {
PlacedSymbol& placedSymbol = bucket.icon.placedSymbols.at(*symbolInstance.placedIconIndex);
const float fontSize = evaluateSizeForFeature(partiallyEvaluatedIconSize, placedSymbol);
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,
showCollisionBoxes, avoidEdges, collisionGroup.second);
placeIcon = placed.first;
offscreen &= placed.second;
}
const bool iconWithoutText = !symbolInstance.hasText || bucket.layout.get<style::TextOptional>();
const bool textWithoutIcon = !symbolInstance.hasIcon || bucket.layout.get<style::IconOptional>();
// 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<style::TextIgnorePlacement>(), bucket.bucketInstanceId, collisionGroup.first);
}
if (placeIcon) {
collisionIndex.insertFeature(symbolInstance.iconCollisionFeature, bucket.layout.get<style::IconIgnorePlacement>(), bucket.bucketInstanceId, collisionGroup.first);
}
assert(symbolInstance.crossTileID != 0);
if (placements.find(symbolInstance.crossTileID) != placements.end()) {
// If there's a previous placement with this ID, it comes from a tile that's fading out
// Erase it so that the placement result from the non-fading tile supersedes it
placements.erase(symbolInstance.crossTileID);
}
placements.emplace(symbolInstance.crossTileID, JointPlacement(placeText || alwaysShowText, placeIcon || alwaysShowIcon, offscreen || bucket.justReloaded));
seenCrossTileIDs.insert(symbolInstance.crossTileID);
}
}
bucket.justReloaded = false;
}