Add circle render type

As specified in:
https://github.com/mapbox/mapbox-gl-style-spec/blob/v8-circle/reference/v8.json

Part of #1740.

2 files changed, 17 insertions, 0 deletions

diff --git a/include/mbgl/style/style_properties.hpp b/include/mbgl/style/style_properties.hpp
index 9ab528586f..23354b1a24 100644
--- a/include/mbgl/style/style_properties.hpp
+++ b/include/mbgl/style/style_properties.hpp
@@ -45,6 +45,20 @@ struct LineProperties {
     }
 };
 
+struct CircleProperties {
+    inline CircleProperties() {}
+    float radius = 5.0f;
+    Color color = {{ 0, 0, 0, 1 }};
+    float opacity = 1.0f;
+    std::array<float, 2> translate = {{ 0, 0 }};
+    TranslateAnchorType translateAnchor = TranslateAnchorType::Map;
+    float blur = 0;
+
+    inline bool isVisible() const {
+        return radius > 0 && color[3] > 0 && opacity > 0;
+    }
+};
+
 struct SymbolProperties {
     inline SymbolProperties() {}
 
@@ -100,6 +114,7 @@ struct BackgroundProperties {
 typedef mapbox::util::variant<
     FillProperties,
     LineProperties,
+    CircleProperties,
     SymbolProperties,
     RasterProperties,
     BackgroundProperties,
diff --git a/include/mbgl/style/types.hpp b/include/mbgl/style/types.hpp
index e46ece6f4a..adc13b386c 100644
--- a/include/mbgl/style/types.hpp
+++ b/include/mbgl/style/types.hpp
@@ -27,6 +27,7 @@ enum class StyleLayerType : uint8_t {
     Unknown,
     Fill,
     Line,
+    Circle,
     Symbol,
     Raster,
     Background
@@ -36,6 +37,7 @@ MBGL_DEFINE_ENUM_CLASS(StyleLayerTypeClass, StyleLayerType, {
     { StyleLayerType::Unknown, "unknown" },
     { StyleLayerType::Fill, "fill" },
     { StyleLayerType::Line, "line" },
+    { StyleLayerType::Circle, "circle" },
     { StyleLayerType::Symbol, "symbol" },
     { StyleLayerType::Raster, "raster" },
     { StyleLayerType::Background, "background" },