VectorRasterizer.h

#pragma once
 
#include "VectorStyle.h"
 
#include <CesiumGeometry/Rectangle.h>
#include <CesiumGeospatial/CartographicPolygon.h>
#include <CesiumGeospatial/Ellipsoid.h>
#include <CesiumGeospatial/GlobeRectangle.h>
#include <CesiumGltf/ImageAsset.h>
#include <CesiumUtility/Color.h>
#include <CesiumUtility/IntrusivePointer.h>
#include <CesiumUtility/ReferenceCounted.h>
#include <CesiumVectorData/GeoJsonObject.h>
 
#include <blend2d.h>
#include <blend2d/context.h>
#include <blend2d/image.h>
 
#include <span>
 
namespace CesiumVectorData {

class VectorRasterizer {
public:
  VectorRasterizer(
      const CesiumGeospatial::GlobeRectangle& bounds,
      CesiumUtility::IntrusivePointer<CesiumGltf::ImageAsset>& imageAsset,
      uint32_t mipLevel = 0,
      const CesiumGeospatial::Ellipsoid& ellipsoid =
          CesiumGeospatial::Ellipsoid::WGS84);

  void drawPolygon(
      const CesiumGeospatial::CartographicPolygon& polygon,
      const PolygonStyle& style);

  void drawPolygon(
      const std::vector<std::vector<glm::dvec3>>& polygon,
      const PolygonStyle& style);

  void drawPolyline(
      const std::span<const glm::dvec3>& points,
      const LineStyle& style);

  void drawGeoJsonObject(
      const GeoJsonObject& geoJsonObject,
      const VectorStyle& style);

  void clear(const CesiumUtility::Color& clearColor);

  CesiumUtility::IntrusivePointer<CesiumGltf::ImageAsset> finalize();
 
private:
  CesiumGeospatial::GlobeRectangle _bounds;
  BLImage _image;
  BLContext _context;
  CesiumUtility::IntrusivePointer<CesiumGltf::ImageAsset> _imageAsset;
  uint32_t _mipLevel;
  CesiumGeospatial::Ellipsoid _ellipsoid;
  bool _finalized = false;
};
} // namespace CesiumVectorData