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/*
* Copyright (c) 2020-2021 Vasile Vilvoiu <vasi@vilvoiu.ro>
*
* specgram is free software; you can redistribute it and/or modify
* it under the terms of the MIT license. See LICENSE for details.
*/
#ifndef _RENDERER_HPP_
#define _RENDERER_HPP_
#include "configuration.hpp"
#include <SFML/Graphics.hpp>
#include <vector>
#include <list>
/* Axis tick */
typedef std::tuple<double, std::string> AxisTick;
/* Orientation */
enum class Orientation {
k90CCW,
kNormal,
k90CW,
k180
};
/*
* Spectrogram rendering class
*/
class Renderer {
private:
const Configuration configuration_;
const std::size_t fft_count_;
sf::Font font_;
sf::RenderTexture canvas_;
sf::Texture fft_area_texture_;
std::size_t width_;
std::size_t height_;
sf::Transform legend_transform_;
sf::Transform fft_live_transform_;
sf::Transform fft_area_transform_;
std::list<AxisTick> frequency_ticks_;
std::list<AxisTick> live_ticks_;
[[maybe_unused]] /* need for this method disappeared when fixing #9, might be useful in the future */
static std::list<AxisTick> GetLinearTicks(double v_min, double v_max, const std::string& v_unit,
unsigned int num_ticks);
static std::list<AxisTick> GetNiceTicks(double v_min, double v_max, const std::string& v_unit,
unsigned int length_px, unsigned int est_tick_length_px);
void RenderAxis(sf::RenderTexture& texture,
const sf::Transform& t, bool lhs, Orientation orientation, double length,
const std::list<AxisTick>& ticks);
public:
Renderer() = delete;
Renderer(const Configuration& conf, const ColorMap& cmap, const ValueMap& vmap, std::size_t fft_count);
/* render commands */
void RenderFFTArea(const std::vector<uint8_t>& memory);
void RenderFFTArea(const std::list<std::vector<uint8_t>>& history);
void RenderLiveFFT(const RealWindow& window, const std::vector<uint8_t>& colors);
/* canvas builder */
sf::Texture GetCanvas();
/* size getters */
auto GetWidth() const { return width_; }
auto GetHeight() const { return height_; }
};
#endif
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