sm-26/Source/LcdDisplay.h

#pragma once

#include <JuceHeader.h>

class LcdDisplay : public juce::Component,
                    private juce::Timer
{
public:
    static constexpr int kCols = 80;
    static constexpr int kRows = 4;

    LcdDisplay();

    void setLine (int row, const juce::String& s);
    void showCursor (bool show);
    void clear();
    void paint (juce::Graphics&) override;

private:
    void timerCallback() override;

    static constexpr int kCharW = 6;
    static constexpr int kCharH = 9;

    juce::String lines[kRows];
    int cursorCol = 0;
    int cursorRow = 0;
    bool cursorVisible = false;

    struct GlyphCache {
        uint8_t rows[8] = {};
        bool cached = false;
    };

    GlyphCache glyphCache[256];

    void rasterize (juce::uint32 c);
    uint8_t* getGlyph (juce::uint32 c);
    juce::Font getMonoFont() const;

    JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (LcdDisplay)
};