Mega using Parallel Bus not working properly after 1.4.2

[dapostol73]

I've been using my Mega with 2 screen for a while with version 1.4.2 with no issue, however I recently went to upgrade to a newer version and found anything greater than 1.4.2 has issues where font no longer works properly. On one device it is completely missing, on another all the alignment is off. Is this a known issue and is there a work around? Or is it a bug?

Arduino_DataBus *bus = new Arduino_AVRPAR8(38 /* DC */, 40 /* CS */, 39 /* WR */, 43 /* RD */, 3 /* PORT LOW */);
Arduino_GFX *DisplayGFX = new Arduino_ILI9488(bus, 41);

Arduino_DataBus *bus = new Arduino_AVRPAR16(38 /* DC */, 40 /* CS */, 39 /* WR */, 43 /* RD */, 3 /* PORT LOW */, 1 /* PORT HIGH */);
Arduino_GFX *DisplayGFX = new Arduino_NT35510(bus, 41);

[moononournation]

can you show the code how you use the font?

[dapostol73]

FYI....I'm using GFX Fonts

void DisplayControl::setFont(const GFXfont *gfxFont)
{
    m_gfxFont = gfxFont;
    DisplayGFX->setFont(m_gfxFont);
}

void DisplayControl::print(String st, int16_t x, int16_t y)
{
    DisplayGFX->setCursor(x, y);
    DisplayGFX->print(st);
}

void DisplayControl::drawString(String str, int16_t x, int16_t y, TextAlignment align, uint16_t foregroundColor, uint16_t backgroundColor, boolean invert, boolean mode)
{
    int16_t x1, y1 = 0;
    uint16_t w, h, hIng = 0;
    str.trim();
    // Want to ignore , and lowercase letters that go below like "y"
    // So we ingore height and use hard coded "0" for full height.
    DisplayGFX->getTextBounds("0", 0, y, &x1, &y1, &w, &h);
    DisplayGFX->getTextBounds(str, 0, y, &x1, &y1, &w, &hIng);
    switch (align)
    {
        case TEXT_LEFT_TOP:
            break;
        case TEXT_LEFT_MIDDLE:
            y -= h * 0.5;
            break;
        case TEXT_LEFT_BOTTOM:
            y -= h;
            break;
        case TEXT_CENTER_TOP:
            x -= w * 0.5;
            break;
        case TEXT_CENTER_MIDDLE:
            x -= w * 0.5;
            y -= h * 0.5;
            break;
        case TEXT_CENTER_BOTTOM:
            x -= w * 0.5;
            y -= h;
            break;
        case TEXT_RIGHT_TOP:
            x -= w + 1;
            break;
        case TEXT_RIGHT_MIDDLE:
            x -= w + 1;
            y -= h * 0.5;
            break;
        case TEXT_RIGHT_BOTTOM:
            x -= w + 1;
            y -= h;
            break;
        default:
            break;
    }

    // for gfx_font, they draw from bottom left, so we need to offset y by the height.
    if (invert)
    {
        if (mode)
        {
            DisplayGFX->fillRect(x, y, x + w, y + h, foregroundColor);
        }
        DisplayGFX->setTextColor(backgroundColor);
        if (m_gfxFont != nullptr) y += h;
        print(str, x, y);
    }
    else
    {
        if (mode)
        {
            DisplayGFX->fillRect(x, y, x + w, y + h, backgroundColor);
        }
        DisplayGFX->setTextColor(foregroundColor);
        if (m_gfxFont != nullptr) y += h;
        print(str, x, y);
    }
}

[moononournation]

you may try the hello world gfxfont first.

[dapostol73]

Ya, that one works, so I suspect the bug is in getTextBounds, I'll do some more investigating and get back to you.

[moononournation]

I remember GFXfont file had updated the data structure previously. You may need to get latest font file to test.

[dapostol73]

So I did some test, and it seems like something is weird with getTextBounds as the width and height seem wrong as well as X and Y. This is was done on the ILI9488 screen with screen rotated to 1 and only using FreeMono8pt7b.

This was the loop code for that,

  char info[128];
  String text = "Hello World!";
  int16_t x = random(gfx->width());
  int16_t y = random(gfx->height());
  gfx->setCursor(x, y);
  gfx->setTextColor(random(0xffff));  
  gfx->setFont(&FreeMono8pt7b);
  int16_t x1, y1 = 0;
  uint16_t w, h = 0;
  gfx->getTextBounds(text, x, y, &x1, &y1, &w, &h);
  sprintf(info, "Value of x = %d, y = %d, x1 = %d, y1 = %d, w = %d, h = %d\n", x, y, x1, y1, w, h);
  Serial.print(info);
  gfx->print(text);
  delay(1000); // 1 second

And here are the output results

Value of x = 7, y = 49, x1 = -58, y1 = -17, w = 315, h = 198
Value of x = 130, y = 72, x1 = 65, y1 = 6, w = 315, h = 198
Value of x = 323, y = 269, x1 = 121, y1 = 203, w = 310, h = 198
Value of x = 12, y = 162, x1 = -53, y1 = 96, w = 315, h = 198
Value of x = 247, y = 209, x1 = 121, y1 = 143, w = 234, h = 198
Value of x = 303, y = 209, x1 = 121, y1 = 143, w = 290, h = 198
Value of x = 280, y = 53, x1 = 121, y1 = -13, w = 267, h = 198
Value of x = 296, y = 135, x1 = 121, y1 = 69, w = 283, h = 198
Value of x = 392, y = 307, x1 = -63, y1 = 241, w = 508, h = 226
Value of x = 19, y = 269, x1 = -46, y1 = 203, w = 315, h = 198
Value of x = 127, y = 112, x1 = 62, y1 = 46, w = 315, h = 198
Value of x = 365, y = 225, x1 = 121, y1 = 159, w = 352, h = 198
Value of x = 354, y = 117, x1 = 121, y1 = 51, w = 341, h = 198
Value of x = 388, y = 184, x1 = -10, y1 = 118, w = 488, h = 226
Value of x = 444, y = 116, x1 = -41, y1 = 78, w = 519, h = 198
Value of x = 202, y = 266, x1 = 137, y1 = 200, w = 315, h = 198
Value of x = 41, y = 133, x1 = -24, y1 = 67, w = 315, h = 198
Value of x = 228, y = 213, x1 = 163, y1 = 147, w = 315, h = 198
Value of x = 475, y = 13, x1 = -24, y1 = -25, w = 454, h = 198
Value of x = 23, y = 296, x1 = -42, y1 = 230, w = 315, h = 198
Value of x = 435, y = 254, x1 = -48, y1 = 216, w = 524, h = 198
Value of x = 437, y = 115, x1 = -48, y1 = 77, w = 526, h = 198
Value of x = 411, y = 58, x1 = -63, y1 = -8, w = 527, h = 226
Value of x = 305, y = 162, x1 = 121, y1 = 96, w = 292, h = 198
Value of x = 76, y = 97, x1 = 11, y1 = 31, w = 315, h = 198
Value of x = 141, y = 97, x1 = 76, y1 = 31, w = 315, h = 198
Value of x = 257, y = 158, x1 = 121, y1 = 92, w = 244, h = 198

[moononournation]

had you updated the FreeMono8pt7b.h in your project?

[dapostol73]

I tried, while it seems okay, it still has issues. The problem is even there when using "hello world gfxfont" sample as you can see in this image with the provided Fonts.

I use this site to generate the GFXFont files: https://rop.nl/truetype2gfx/

[moononournation]

I guess It may caused by above fix. Please help to get update and test it.

[dapostol73]

It is improved, however some lines are still returning as highlighted in Orange and some are not return the correct bounds as you can see they are shifted in purple.

[dapostol73]

Also tested Hello World and the issue still seems to persist.