g13gui/g13d/lcd.cc

/*
         pixels are mapped rather strangely for G13 buffer...

          byte 0 contains column 0 / row 0 - 7
          byte 1 contains column 1 / row 0 - 7

         so the masks for each pixel are laid out as below
   (ByteOffset.PixelMask)

         00.01 01.01 02.01 ...
         00.02 01.02 02.02 ...
         00.04 01.04 02.04 ...
         00.08 01.08 02.08 ...
         00.10 01.10 02.10 ...
         00.20 01.20 02.20 ...
         00.40 01.40 02.40 ...
         00.80 01.80 02.80 ...
         A0.01 A1.01 A2.01 ...
 */

#include <iostream>
#include <fstream>

#include "lcd.h"
#include "device.h"

namespace G13 {

void G13_LCD::image(unsigned char *data, int size) {
  _keypad.write_lcd(data, size);
}

G13_LCD::G13_LCD(G13_Device &keypad) : _keypad(keypad) {
  cursor_col = 0;
  cursor_row = 0;
  text_mode = 0;
}

void G13_LCD::image_setpixel(unsigned row, unsigned col) {
  unsigned offset =
      image_byte_offset(row, col); // col + (row /8 ) * BYTES_PER_ROW * 8;
  unsigned char mask = 1 << ((row)&7);

  if (offset >= G13_LCD_BUF_SIZE) {
    G13_LOG(error,
            "bad offset " << offset << " for " << (row) << " x " << (col));
    return;
  }

  image_buf[offset] |= mask;
}

void G13_LCD::image_clearpixel(unsigned row, unsigned col) {

  unsigned offset =
      image_byte_offset(row, col); // col + (row /8 ) * BYTES_PER_ROW * 8;
  unsigned char mask = 1 << ((row)&7);

  if (offset >= G13_LCD_BUF_SIZE) {
    G13_LOG(error,
            "bad offset " << offset << " for " << (row) << " x " << (col));
    return;
  }
  image_buf[offset] &= ~mask;
}

void G13_LCD::write_pos(int row, int col) {
  cursor_row = row;
  cursor_col = col;
  if (cursor_col >= G13_LCD_COLUMNS) {
    cursor_col = 0;
  }
  if (cursor_row >= G13_LCD_TEXT_ROWS) {
    cursor_row = 0;
  }
}
void G13_LCD::write_char(char c, int row, int col) {
  if (row == -1) {
    row = cursor_row;
    col = cursor_col;
    cursor_col += _keypad.current_font().width();
    if (cursor_col >= G13_LCD_COLUMNS) {
      cursor_col = 0;
      if (++cursor_row >= G13_LCD_TEXT_ROWS) {
        cursor_row = 0;
      }
    }
  }

  unsigned offset = image_byte_offset(row * G13_LCD_TEXT_CHEIGHT,
                                      col); //*_keypad._current_font->_width );
  if (text_mode) {
    memcpy(&image_buf[offset],
           &_keypad.current_font().char_data(c).bits_inverted,
           _keypad.current_font().width());
  } else {
    memcpy(&image_buf[offset],
           &_keypad.current_font().char_data(c).bits_regular,
           _keypad.current_font().width());
  }
}

void G13_LCD::write_string(const char *str) {
  G13_LOG(info, "writing \"" << str << "\"");
  while (*str) {
    if (*str == '\n') {
      cursor_col = 0;
      if (++cursor_row >= G13_LCD_TEXT_ROWS) {
        cursor_row = 0;
      }
    } else if (*str == '\t') {
      cursor_col += 4 - (cursor_col % 4);
      if (++cursor_col >= G13_LCD_COLUMNS) {
        cursor_col = 0;
        if (++cursor_row >= G13_LCD_TEXT_ROWS) {
          cursor_row = 0;
        }
      }
    } else {
      write_char(*str);
    }
    ++str;
  }
  image_send();
}

void G13_LCD::image_test(int x, int y) {
  unsigned int row = 0, col = 0;

  if (y >= 0) {
    image_setpixel(x, y);
  } else {
    image_clear();
    switch (x) {
      case 1:
        for (row = 0; row < G13_LCD_ROWS; ++row) {
          col = row;
          image_setpixel(row, col);
          image_setpixel(row, G13_LCD_COLUMNS - col);
        }
        break;

      case 2:
      default:
        for (row = 0; row < G13_LCD_ROWS; ++row) {
          col = row;
          image_setpixel(row, 8);
          image_setpixel(row, G13_LCD_COLUMNS - 8);
          image_setpixel(row, G13_LCD_COLUMNS / 2);
          image_setpixel(row, col);
          image_setpixel(row, G13_LCD_COLUMNS - col);
        }
        break;
    }
  }

  image_send();
}

} // namespace G13