Align::*Right doesn't work quite right?

[chconnor]

I was using URW Gothic Book. This font, as far as I know, has fixed-width numerals.

When I use Align::TopRight or Align::BottomRight for the numerals, however, the alignment changes when a "1" is the last digit drawn to the screen.

E.g. drawing the string "90" and "91" will cause the 9 to be in a slightly different place. The other combinations (92, 93, 94, etc) all align as expected.

If I use that font in LibreOffice and align right, it works as expected.

Here is the original TTF.

Here is the stripped-down version (out of fontforge) that I'm actually using.

Any ideas? Is this a confusion on my part about what to expect from AlignRight? Maybe it goes by the actual glyph contents, rather than the specified character width?

[takkaO]

Thank you for using.

I will try your code. Please give me some time.

(I crezy busy my main business, so it will takes time 🙇‍♂️🙇‍♂️🙇‍♂️)

[chconnor]

Thanks @takkaO -- in case it's helpful, below is some demo code.

And here is the reduced URWGothic-Book.h.

Attached is a pic of the output. You can see that the left side of the Align::TopRight section is not even. However the right side of Align::TopLeft section is even. So it would seem that there is a difference when the align is left or right in terms of how it computes the edge of the character.

Attached is also a pic of the "1" and "2" digits in fontforge, in case that's useful.

#include <Arduino.h>
#include "SPI.h"
#include <TFT_eSPI.h> // screen; uses src/TFT_eSPI_Setup.h after library file User_Setup_Select.h changed to #include <../../../../src/TFT_eSPI_Setup.h> 
#include "OpenFontRender.h"
#include "URWGothic_Book.h"

#define TFT_BLK 4 // pin for enable/disable of screen backlight
static TFT_eSPI tft = TFT_eSPI();
static OpenFontRender ofr;

void setup()
{
  Serial.begin(115200);
  while (!Serial) delay(10);

  pinMode(TFT_BLK, OUTPUT);
  digitalWrite(TFT_BLK, HIGH); // HIGH=screen on
  tft.init();
  tft.fillScreen(TFT_BLACK);

  ofr.setDrawer(tft); // Link drawing object to tft instance (so font will be rendered on TFT)
  ofr.setFontColor(TFT_WHITE, TFT_BLACK); // bg color is for antialiasing
  if (ofr.loadFont(URWGothic_Book, sizeof(URWGothic_Book)))
  {
     Serial.println("font initialization error");
     return;
  }

  ofr.setFontSize(15);

  ofr.setAlignment(Align::TopRight);
  ofr.setCursor(20, 20);
  ofr.printf("90");
  ofr.setCursor(20, 40);
  ofr.printf("91");             // *********** why does this one shift to the right?
  ofr.setCursor(20, 60);
  ofr.printf("92");

  ofr.setAlignment(Align::TopLeft);
  ofr.setCursor(20, 90);
  ofr.printf("09");
  ofr.setCursor(20, 110);
  ofr.printf("19");            // *********** this one looks OK, as expected
  ofr.setCursor(20, 130);
  ofr.printf("22");
}

void loop() { ; }

[larrybud2004]

Also experiencing this with the stock NotoSans_Bold font. Font size doesn't matter, although it's more difficult to see at small sizes.