il3820_drawPixel.c

/*
 * @file il3820_drawPixel.c
 *
 * @author Matthew Matz & Roy Eltham
 *
 * @version 0.5
 *
 * @copyright Copyright (C) Parallax, Inc. 2018.  See end of file for
 * terms of use (MIT License).
 *
 * @brief Waveshare ePaper display driver component, see il3820_h. for documentation.
 *
 * @detail Please submit bug reports, suggestions, and improvements to
 * this code to editor@parallax.com.
 */


#include "il3820.h"

void il3820_drawPixel(screen *dev, int x, int y, int color)
{
  switch (color) {
    case WHITE:
      dev->image_ptr[(x + y * dev->width) >> 3] |= 0x80 >> (x & 7);
      break;
    case BLACK:
      dev->image_ptr[(x + y * dev->width) >> 3] &= ~(0x80 >> (x & 7));
      break;
    case INVERSE:
      dev->image_ptr[(x + y * dev->width) >> 3] ^= 0x80 >> (x & 7);
      break;
  }  
}