From 26293db40f8ac62f3971e0e9dbbc0bf3439e61c0 Mon Sep 17 00:00:00 2001
From: Vasile Vilvoiu <vasi.vilvoiu@gmail.com>
Date: Tue, 29 Dec 2020 19:33:03 +0200
Subject: Initial commit

---
 src/renderer.hpp | 75 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 75 insertions(+)
 create mode 100644 src/renderer.hpp

(limited to 'src/renderer.hpp')

diff --git a/src/renderer.hpp b/src/renderer.hpp
new file mode 100644
index 0000000..4272203
--- /dev/null
+++ b/src/renderer.hpp
@@ -0,0 +1,75 @@
+/*
+ * Copyright (c) 2020-2021 Vasile Vilvoiu <vasi.vilvoiu@gmail.com>
+ *
+ * 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_;
+
+    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
\ No newline at end of file
-- 
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