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Fetch JUCE into build/, tidy gitignore, expand README
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12 changed files with 350 additions and 149 deletions
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@ -1,66 +1,116 @@
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#include "LcdDisplay.h"
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namespace {
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// Classic 5x8 dot-matrix LCD character generator ROM (HD44780-style),
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// rows top-to-bottom, bit 4 = leftmost column. Index = ASCII - 32.
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constexpr uint8_t kFont[95][8] =
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{
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{0,0,0,0,0,0,0,0}, // space
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{4,4,4,4,4,0,4,0}, // !
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{10,10,10,0,0,0,0,0}, // "
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{0,10,31,10,31,10,0,0}, // #
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{4,15,20,14,5,30,4,0}, // $
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{2,4,8,16,14,17,14,0}, // %
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{8,20,20,8,21,18,13,0}, // &
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{4,4,4,0,0,0,0,0}, // '
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{2,4,8,8,8,4,2,0}, // (
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{8,4,2,2,2,4,8,0}, // )
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{0,10,4,31,4,10,0,0}, // *
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{0,4,4,31,4,4,0,0}, // +
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{0,0,0,0,6,2,4,0}, // ,
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{0,0,0,31,0,0,0,0}, // -
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{0,0,0,0,0,0,12,0}, // .
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{1,2,4,8,16,0,0,0}, // /
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{14,17,19,21,25,17,14,0}, // 0
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{4,12,4,4,4,4,14,0}, // 1
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{14,17,1,2,4,8,31,0}, // 2
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{14,17,1,6,1,17,14,0}, // 3
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{2,6,10,18,31,2,2,0}, // 4
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{31,16,30,1,1,17,14,0}, // 5
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{6,8,16,30,17,17,14,0}, // 6
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{31,1,2,4,8,8,8,0}, // 7
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{14,17,17,14,17,17,14,0}, // 8
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{14,17,17,15,1,2,12,0}, // 9
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{0,0,6,0,0,6,0,0}, // :
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{0,0,6,0,0,6,2,4}, // ;
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{2,4,8,16,8,4,2,0}, // <
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{0,0,31,0,31,0,0,0}, // =
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{8,4,2,1,2,4,8,0}, // >
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{14,17,1,2,4,0,4,0}, // ?
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{14,17,1,13,21,17,14,0}, // @
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{14,17,17,31,17,17,17,0}, // A
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{30,17,17,30,17,17,30,0}, // B
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{14,17,16,16,16,17,14,0}, // C
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{30,17,17,17,17,17,30,0}, // D
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{31,16,16,30,16,16,31,0}, // E
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{31,16,16,30,16,16,16,0}, // F
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{14,17,16,23,17,17,15,0}, // G
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{17,17,17,31,17,17,17,0}, // H
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{14,4,4,4,4,4,14,0}, // I
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{7,2,2,2,2,18,12,0}, // J
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{17,18,20,24,20,18,17,0}, // K
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{16,16,16,16,16,16,31,0}, // L
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{17,27,21,21,17,17,17,0}, // M
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{17,25,21,19,17,17,17,0}, // N
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{14,17,17,17,17,17,14,0}, // O
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{30,17,17,30,16,16,16,0}, // P
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{14,17,17,17,21,18,13,0}, // Q
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{30,17,17,30,20,18,17,0}, // R
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{15,16,16,14,1,1,30,0}, // S
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{31,4,4,4,4,4,4,0}, // T
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{17,17,17,17,17,17,14,0}, // U
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{17,17,17,17,17,10,4,0}, // V
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{17,17,17,21,21,27,17,0}, // W
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{17,17,10,4,10,17,17,0}, // X
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{17,17,17,10,4,4,4,0}, // Y
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{31,1,2,4,8,16,31,0}, // Z
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{14,8,8,8,8,8,14,0}, // [
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{16,8,4,2,1,0,0,0}, // backslash
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{14,2,2,2,2,2,14,0}, // ]
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{4,10,17,0,0,0,0,0}, // ^
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{0,0,0,0,0,0,31,0}, // _
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{8,4,2,0,0,0,0,0}, // `
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{0,0,14,1,15,17,15,0}, // a
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{16,16,30,17,17,17,30,0}, // b
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{0,0,14,16,16,17,14,0}, // c
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{1,1,15,17,17,17,15,0}, // d
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{0,0,14,17,31,16,14,0}, // e
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{2,4,4,14,4,4,4,0}, // f
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{0,0,15,17,17,15,1,14}, // g
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{16,16,30,17,17,17,17,0}, // h
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{0,6,0,4,4,4,4,0}, // i
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{0,6,0,4,4,4,8,0}, // j
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{0,0,16,18,20,24,20,0}, // k
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{0,0,12,4,4,4,4,0}, // l
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{0,0,26,21,21,21,21,0}, // m
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{0,0,18,29,17,17,17,0}, // n
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{0,0,14,17,17,17,14,0}, // o
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{0,30,17,17,30,16,16,0}, // p
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{0,0,15,17,17,15,1,1}, // q
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{0,0,30,17,16,16,16,0}, // r
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{0,0,15,16,14,1,30,0}, // s
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{0,4,4,14,4,4,2,0}, // t
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{0,0,17,17,17,19,13,0}, // u
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{0,0,17,17,17,10,4,0}, // v
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{0,0,17,17,21,21,10,0}, // w
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{0,0,17,10,4,10,17,0}, // x
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{0,0,17,17,17,10,12,0}, // y
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{0,0,31,2,4,8,31,0}, // z
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{4,8,8,16,8,8,4,0}, // {
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{4,4,4,4,4,4,4,0}, // |
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{8,4,4,2,4,4,8,0}, // }
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{13,18,0,0,0,0,0,0}, // ~
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};
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} // namespace
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LcdDisplay::LcdDisplay()
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{
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clear();
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startTimerHz (30);
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}
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void LcdDisplay::rasterize (juce::uint32 c)
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{
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if (c >= 256 || glyphCache[c].cached) return;
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juce::Image img (juce::Image::ARGB, kRasterW, kRasterH, true);
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{
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juce::Graphics g (img);
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g.setColour (juce::Colours::white);
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g.setFont (juce::Font (juce::FontOptions { juce::Font::getDefaultMonospacedFontName(),
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14.0f, juce::Font::plain }));
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juce::String s;
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s << (juce_wchar) c;
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g.drawText (s, img.getBounds().removeFromBottom (kRasterH - 2),
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juce::Justification::centredBottom, false);
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}
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const float sx = (float) kRasterW / 5.0f;
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const float sy = (float) kRasterH / 8.0f;
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for (int row = 0; row < 8; ++row)
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glyphCache[c].rows[row] = 0;
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for (int row = 0; row < 8; ++row)
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{
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uint8_t bits = 0;
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for (int col = 0; col < 5; ++col)
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{
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int count = 0, total = 0;
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int px0 = (int) (col * sx);
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int py0 = (int) (row * sy);
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int px1 = juce::jmin ((int) ((col + 1) * sx) - 1, kRasterW - 1);
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int py1 = juce::jmin ((int) ((row + 1) * sy) - 1, kRasterH - 1);
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for (int y = py0; y <= py1; ++y)
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for (int x = px0; x <= px1; ++x)
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{
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total++;
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if (img.getPixelAt (x, y).getAlpha() > 127)
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count++;
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}
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if (total > 0 && count > total / 3)
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bits |= (uint8_t) (1u << (4 - col));
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}
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glyphCache[c].rows[row] = bits;
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}
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glyphCache[c].cached = true;
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}
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uint8_t* LcdDisplay::getGlyph (juce::uint32 c)
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{
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if (c >= 256) c = '?';
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if (! glyphCache[c].cached)
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rasterize (c);
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return glyphCache[c].rows;
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}
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void LcdDisplay::setLine (int row, const juce::String& s)
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{
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if (row >= 0 && row < kRows)
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@ -78,6 +128,13 @@ void LcdDisplay::clear()
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cursorVisible = false;
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}
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const uint8_t* LcdDisplay::getGlyph (juce::uint32 c) const
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{
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if (c < 32 || c > 126)
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c = '?';
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return kFont[c - 32];
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}
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void LcdDisplay::paint (juce::Graphics& g)
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{
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const float w = (float) getWidth();
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@ -95,6 +152,22 @@ void LcdDisplay::paint (juce::Graphics& g)
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float ox = 0.0f;
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float oy = 0.0f;
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float padX = cw * 0.18f;
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float padY = ch * 0.10f;
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float gw = cw - padX * 2.0f;
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float gh = ch - padY * 2.0f;
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constexpr float kAspect = 2.0f;
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constexpr float kGapCol = 0.22f;
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constexpr float kGapRow = 0.12f;
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const float gridW = 5.0f + 4.0f * kGapCol;
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const float gridH = kAspect * (8.0f + 7.0f * kGapRow);
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const float cellW = juce::jmax (0.0f, juce::jmin (gw / gridW, gh / gridH));
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const float cellH = cellW * kAspect;
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const float stepX = cellW * (1.0f + kGapCol);
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const float stepY = cellH * (1.0f + kGapRow);
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bool blinkOn = cursorVisible &&
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((int) (juce::Time::getMillisecondCounterHiRes() / 400.0) % 2 == 0);
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@ -104,7 +177,7 @@ void LcdDisplay::paint (juce::Graphics& g)
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for (int col = 0; col < kCols; ++col)
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{
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juce_wchar ch2 = col < line.length() ? line [(size_t) col] : (juce_wchar) ' ';
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uint8_t* glyph = getGlyph ((juce::uint32) ch2);
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const uint8_t* glyph = getGlyph ((juce::uint32) ch2);
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float cx = ox + (float) col * cw;
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float cy = oy + (float) row * ch;
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@ -112,10 +185,8 @@ void LcdDisplay::paint (juce::Graphics& g)
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g.setColour (pixOff);
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g.fillRect (cx + 0.5f, cy + 0.5f, cw - 1.0f, ch - 1.0f);
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float padX = cw * 0.12f;
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float padY = ch * 0.1f;
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float gw = cw - padX * 2.0f;
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float gh = ch - padY * 2.0f;
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float gridX = cx + padX + (gw - cellW * gridW) * 0.5f;
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float gridY = cy + padY + (gh - cellW * gridH) * 0.5f;
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for (int gRow = 0; gRow < 8; ++gRow)
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{
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@ -125,15 +196,14 @@ void LcdDisplay::paint (juce::Graphics& g)
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{
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if (bits & (1u << (4 - gCol)))
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{
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float px = cx + padX + (float) gCol * gw / 5.0f;
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float py = cy + padY + (float) gRow * gh / 8.0f;
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float pw = gw / 5.0f - 0.5f;
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float ph = gh / 8.0f - 0.4f;
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float px = gridX + (float) gCol * stepX;
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float py = gridY + (float) gRow * stepY;
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g.setColour (pixOnDim);
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g.fillRect (px - 0.6f, py - 0.4f, pw + 1.2f, ph + 0.8f);
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g.fillRect (px - cellW * 0.10f, py - cellH * 0.05f,
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cellW * 1.20f, cellH * 1.10f);
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g.setColour (pixOn);
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g.fillRect (px, py, pw, ph);
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g.fillRect (px, py, cellW, cellH);
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}
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}
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}
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@ -147,4 +217,4 @@ void LcdDisplay::paint (juce::Graphics& g)
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}
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}
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void LcdDisplay::timerCallback() { repaint(); }
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void LcdDisplay::timerCallback() { repaint(); }
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