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#pragma once
#include "geometry/point2d.hpp"
namespace df
{
// Pixel ratio independent viewport implementation
// pixelRatio is ratio between physical pixels and device-independent
// pixels for the window. On retina displays pixelRation equal 2.0, In common equal 1.0
class Viewport
{
public:
// x0, y0, w, h is device-independent pixels
Viewport(uint32_t x0, uint32_t y0,
uint32_t w, uint32_t h);
///@{ in surface pixels
/// on iOS we must mul this on scaleFactor
/// on android we get true size from surface
void SetViewport(uint32_t x0, uint32_t y0, uint32_t w, uint32_t h);
uint32_t GetX0() const;
uint32_t GetY0() const;
uint32_t GetWidth() const;
uint32_t GetHeight() const;
///@}
// Apply viewport to graphics pipeline
// with convert start poin and size to physical pixels
void Apply() const;
private:
m2::PointU m_zero;
m2::PointU m_size;
};
} // namespace df
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