Rotated values in Arduino/epd2in9_V2 incorrectly calculated.

[o-gb]

in file /waveshare/e-Paper/Arduino/epd2in9_V2/epdpaint.cpp in function Paint::DrawPixel(...)
Lines 121 x = this->width - y;

  128      x = this->width - x;
  129      y = this->height - y;

  137      y = this->height - point_temp;

The code does not generate the correct new x/y values during rotation.
Solution: change this statements to 121 x = (this->width -1) - y;

  128      x = (this->width -1) - x;
  129      y = (this->height -1) - y;

  137      y = (this->height -1) - point_temp;  

There is the same bug in /waveshare/e-Paper/Arduino/epd4in2b_V2/epdpaint.cpp . I did not check if this error was also present in other paint objects of this project.

[michapr]

I have changed it in my lib for 2in7 display but cannot get right result for rotating text (90 or 270 degree) - does this work for you?