[core] Implement circle-pitch-alignment property

Closes issue #9349.

2 files changed, 32 insertions, 0 deletions

diff --git a/src/mbgl/style/layers/circle_layer.cpp b/src/mbgl/style/layers/circle_layer.cpp
index 3bba135c84..9854932699 100644
--- a/src/mbgl/style/layers/circle_layer.cpp
+++ b/src/mbgl/style/layers/circle_layer.cpp
@@ -283,6 +283,33 @@ TransitionOptions CircleLayer::getCirclePitchScaleTransition() const {
     return impl().paint.template get<CirclePitchScale>().options;
 }
 
+PropertyValue<AlignmentType> CircleLayer::getDefaultCirclePitchAlignment() {
+    return { AlignmentType::Viewport };
+}
+
+PropertyValue<AlignmentType> CircleLayer::getCirclePitchAlignment() const {
+    return impl().paint.template get<CirclePitchAlignment>().value;
+}
+
+void CircleLayer::setCirclePitchAlignment(PropertyValue<AlignmentType> value) {
+    if (value == getCirclePitchAlignment())
+        return;
+    auto impl_ = mutableImpl();
+    impl_->paint.template get<CirclePitchAlignment>().value = value;
+    baseImpl = std::move(impl_);
+    observer->onLayerChanged(*this);
+}
+
+void CircleLayer::setCirclePitchAlignmentTransition(const TransitionOptions& options) {
+    auto impl_ = mutableImpl();
+    impl_->paint.template get<CirclePitchAlignment>().options = options;
+    baseImpl = std::move(impl_);
+}
+
+TransitionOptions CircleLayer::getCirclePitchAlignmentTransition() const {
+    return impl().paint.template get<CirclePitchAlignment>().options;
+}
+
 DataDrivenPropertyValue<float> CircleLayer::getDefaultCircleStrokeWidth() {
     return { 0 };
 }
diff --git a/src/mbgl/style/layers/circle_layer_properties.hpp b/src/mbgl/style/layers/circle_layer_properties.hpp
index 73b7028465..bc0c961e75 100644
--- a/src/mbgl/style/layers/circle_layer_properties.hpp
+++ b/src/mbgl/style/layers/circle_layer_properties.hpp
@@ -40,6 +40,10 @@ struct CirclePitchScale : PaintProperty<CirclePitchScaleType> {
     static CirclePitchScaleType defaultValue() { return CirclePitchScaleType::Map; }
 };
 
+struct CirclePitchAlignment : PaintProperty<AlignmentType> {
+    static AlignmentType defaultValue() { return AlignmentType::Viewport; }
+};
+
 struct CircleStrokeWidth : DataDrivenPaintProperty<float, attributes::a_stroke_width, uniforms::u_stroke_width> {
     static float defaultValue() { return 0; }
 };
@@ -60,6 +64,7 @@ class CirclePaintProperties : public Properties<
     CircleTranslate,
     CircleTranslateAnchor,
     CirclePitchScale,
+    CirclePitchAlignment,
     CircleStrokeWidth,
     CircleStrokeColor,
     CircleStrokeOpacity