Repo created

libs/drape_frontend/circles_pack_shape.hpp

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+#pragma once
+
+#include "drape_frontend/map_shape.hpp"
+#include "drape_frontend/render_state_extension.hpp"
+#include "drape_frontend/shape_view_params.hpp"
+
+#include "drape/overlay_handle.hpp"
+#include "drape/pointers.hpp"
+#include "drape/render_bucket.hpp"
+#include "drape/utils/vertex_decl.hpp"
+
+#include <vector>
+
+namespace dp
+{
+class TextureManager;
+class GraphicsContext;
+}  // namespace dp
+
+namespace df
+{
+struct CirclesPackRenderData
+{
+  uint32_t m_pointsCount;
+
+  dp::RenderState m_state;
+  drape_ptr<dp::RenderBucket> m_bucket;
+  CirclesPackRenderData()
+    : m_pointsCount(0)
+    , m_state(CreateRenderState(gpu::Program::CirclePoint, DepthLayer::OverlayLayer))
+  {}
+};
+
+struct CirclesPackDynamicVertex
+{
+  using TPosition = glsl::vec3;
+  using TColor = glsl::vec4;
+
+  CirclesPackDynamicVertex() = default;
+  CirclesPackDynamicVertex(TPosition const & pos, TColor const & color) : m_position(pos), m_color(color) {}
+
+  TPosition m_position;
+  TColor m_color;
+};
+
+class CirclesPackHandle : public dp::OverlayHandle
+{
+  using TBase = dp::OverlayHandle;
+
+public:
+  explicit CirclesPackHandle(size_t pointsCount);
+  void GetAttributeMutation(ref_ptr<dp::AttributeBufferMutator> mutator) const override;
+  bool Update(ScreenBase const & screen) override;
+  m2::RectD GetPixelRect(ScreenBase const & screen, bool perspective) const override;
+  void GetPixelShape(ScreenBase const & screen, bool perspective, Rects & rects) const override;
+  bool IndexesRequired() const override;
+
+  void Clear();
+  void SetPoint(size_t index, m2::PointD const & position, float radius, dp::Color const & color);
+  size_t GetPointsCount() const;
+
+private:
+  std::vector<CirclesPackDynamicVertex> m_buffer;
+  mutable bool m_needUpdate;
+};
+
+class CirclesPackShape
+{
+public:
+  static void Draw(ref_ptr<dp::GraphicsContext> context, CirclesPackRenderData & data);
+};
+}  // namespace df