1 files changed, 114 insertions, 0 deletions
diff --git a/src/mbgl/renderer/symbol_bucket.hpp b/src/mbgl/renderer/symbol_bucket.hpp
new file mode 100644
index 0000000000..dd596b1a00
--- /dev/null
+++ b/src/mbgl/renderer/symbol_bucket.hpp
@@ -0,0 +1,114 @@
+#ifndef MBGL_RENDERER_SYMBOLBUCKET
+#define MBGL_RENDERER_SYMBOLBUCKET
+
+#include <mbgl/renderer/bucket.hpp>
+#include <mbgl/geometry/vao.hpp>
+#include <mbgl/geometry/elements_buffer.hpp>
+#include <mbgl/geometry/text_buffer.hpp>
+#include <mbgl/geometry/icon_buffer.hpp>
+#include <mbgl/map/vector_tile.hpp>
+#include <mbgl/text/types.hpp>
+#include <mbgl/text/glyph.hpp>
+#include <mbgl/style/style_bucket.hpp>
+
+#include <memory>
+#include <map>
+#include <vector>
+
+namespace mbgl {
+
+class Style;
+class SDFShader;
+class IconShader;
+class DotShader;
+class Collision;
+class SpriteAtlas;
+class Sprite;
+class GlyphAtlas;
+class GlyphStore;
+class FontStack;
+
+class SymbolFeature {
+public:
+    pbf geometry;
+    std::u32string label;
+    std::string sprite;
+};
+
+
+class Symbol {
+public:
+    vec2<float> tl, tr, bl, br;
+    Rect<uint16_t> tex;
+    float angle;
+    float minScale = 0.0f;
+    float maxScale = std::numeric_limits<float>::infinity();
+    CollisionAnchor anchor;
+};
+
+typedef std::vector<Symbol> Symbols;
+
+
+class SymbolBucket : public Bucket {
+    typedef ElementGroup<1> TextElementGroup;
+    typedef ElementGroup<2> IconElementGroup;
+
+public:
+    SymbolBucket(const StyleBucketSymbol &properties, Collision &collision);
+
+    virtual void render(Painter &painter, util::ptr<StyleLayer> layer_desc, const Tile::ID &id, const mat4 &matrix);
+    virtual bool hasData() const;
+    virtual bool hasTextData() const;
+    virtual bool hasIconData() const;
+
+    void addFeatures(const VectorTileLayer &layer, const FilterExpression &filter,
+                     const Tile::ID &id, SpriteAtlas &spriteAtlas, Sprite &sprite,
+                     GlyphAtlas &glyphAtlas, GlyphStore &glyphStore);
+
+    void addGlyphs(const PlacedGlyphs &glyphs, float placementZoom, PlacementRange placementRange,
+                   float zoom);
+
+    void drawGlyphs(SDFShader& shader);
+    void drawIcons(SDFShader& shader);
+    void drawIcons(IconShader& shader);
+
+private:
+
+    std::vector<SymbolFeature> processFeatures(const VectorTileLayer &layer, const FilterExpression &filter, GlyphStore &glyphStore, const Sprite &sprite);
+
+
+    void addFeature(const pbf &geom_pbf, const Shaping &shaping, const GlyphPositions &face, const Rect<uint16_t> &image);
+    void addFeature(const std::vector<Coordinate> &line, const Shaping &shaping, const GlyphPositions &face, const Rect<uint16_t> &image);
+
+
+    // Adds placed items to the buffer.
+    template <typename Buffer>
+    void addSymbols(Buffer &buffer, const PlacedGlyphs &symbols, float scale, PlacementRange placementRange);
+
+    // Adds glyphs to the glyph atlas so that they have a left/top/width/height coordinates associated to them that we can use for writing to a buffer.
+    static void addGlyphsToAtlas(uint64_t tileid, const std::string stackname, const std::u32string &string,
+                          const FontStack &fontStack, GlyphAtlas &glyphAtlas, GlyphPositions &face);
+
+public:
+    const StyleBucketSymbol &properties;
+    bool sdfIcons = false;
+
+private:
+    Collision &collision;
+
+    struct {
+        TextVertexBuffer vertices;
+        TriangleElementsBuffer triangles;
+        std::vector<TextElementGroup> groups;
+    } text;
+
+    struct {
+        IconVertexBuffer vertices;
+        TriangleElementsBuffer triangles;
+        std::vector<IconElementGroup> groups;
+    } icon;
+
+};
+}
+
+#endif