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#ifndef MBGL_MAP_TRANSFORM_STATE
#define MBGL_MAP_TRANSFORM_STATE
#include <mbgl/map/tile.hpp>
#include <mbgl/util/mat4.hpp>
#include <mbgl/util/geo.hpp>
#include <mbgl/util/vec.hpp>
#include <cstdint>
#include <array>
#include <limits>
namespace mbgl {
class TransformState {
friend class Transform;
public:
// Matrix
void matrixFor(mat4& matrix, const Tile::ID& id) const;
box cornersToBox(uint32_t z) const;
// Dimensions
bool hasSize() const;
uint16_t getWidth() const;
uint16_t getHeight() const;
uint16_t getFramebufferWidth() const;
uint16_t getFramebufferHeight() const;
const std::array<uint16_t, 2> getFramebufferDimensions() const;
float getPixelRatio() const;
float worldSize() const;
float lngX(float lon) const;
float latY(float lat) const;
std::array<float, 2> locationCoordinate(float lon, float lat) const;
void getLonLat(double &lon, double &lat) const;
// Position
const LatLng getLatLng() const;
// Zoom
float getNormalizedZoom() const;
double getZoom() const;
int32_t getIntegerZoom() const;
double getZoomFraction() const;
double getScale() const;
// Rotation
float getAngle() const;
// Projection
const vec2<double> pixelForLatLng(const LatLng latLng) const;
const LatLng latLngForPixel(const vec2<double> pixel) const;
// Changing
bool isChanging() const;
private:
double pixel_x() const;
double pixel_y() const;
private:
// logical dimensions
uint16_t width = 0, height = 0;
// physical (framebuffer) dimensions
std::array<uint16_t, 2> framebuffer = {{ 0, 0 }};
// map scale factor
float pixelRatio = 0;
// cache values for spherical mercator math
double Bc, Cc;
// animation state
bool rotating = false;
bool scaling = false;
bool panning = false;
// map position
double x = 0, y = 0;
double angle = 0;
double scale = 1;
};
}
#endif
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