Adding new tft_espi feautres:

[Fischkopppp]

Hi moononournation, thank you for your great library! Do you plan to add new features from tft_espi library to yours?
For example: fillRectHGradient / fillRectVGradient / fillSmoothCircle / fillSmoothRect / fillSmoothRoundRect?
They are great and allow you to create graphics that are looking more like vector graphics, instead of pixel graphics.

[moononournation]

yes fill gradient is in wishlist, but what is fill smooth?

[Fischkopppp]

You can find those smooth functions in the TFT_eSPI.cpp file starting at line 3665.
They offer anti-aliased circles, round rectangles, ellipse, and so on. You can create very nice looking graphics with these functions.

/***************************************************************************************
** Function name:           drawPixel (aplha blended)
** Description:             Draw a pixel blended with the screen or bg pixel colour
***************************************************************************************/
uint16_t TFT_eSPI::drawPixel(int32_t x, int32_t y, uint32_t color, uint8_t alpha, uint32_t bg_color)
{
  if (bg_color == 0x00FFFFFF) bg_color = readPixel(x, y);
  bg_color = alphaBlend(alpha, color, bg_color);
  drawPixel(x, y, bg_color);
  return bg_color;
}

/***************************************************************************************
** Function name:           fillSmoothCircle
** Description:             Draw a filled anti-aliased circle
***************************************************************************************/
void TFT_eSPI::fillSmoothCircle(int32_t x, int32_t y, int32_t r, uint32_t color, uint32_t bg_color)
{
  inTransaction = true;
  int16_t xs = 0;
  int16_t cx;
  r++;
  for (int16_t cy = r; cy > 0; cy--)
  {
    for (cx = xs; cx <= xs + 1 && cx < r; cx++)
    {
      float deltaX = r - cx;
      float deltaY = r - cy;
      float alphaf = r - sqrtf(deltaX * deltaX + deltaY * deltaY);
      if (alphaf > 1.0) continue;
      xs = cx;
      if (alphaf < LoAlphaTheshold) continue;
      uint8_t alpha = alphaf * 255;
      drawPixel(x + cx - r, y + cy - r, color, alpha, bg_color);
      drawPixel(x - cx + r, y + cy - r, color, alpha, bg_color);
      drawPixel(x - cx + r, y - cy + r, color, alpha, bg_color);
      drawPixel(x + cx - r, y - cy + r, color, alpha, bg_color);
    }
    cx--;
    drawFastHLine(x + cx - r, y + cy - r, 2 * (r - cx) + 1, color);
    drawFastHLine(x + cx - r, y - cy + r, 2 * (r - cx) + 1, color);
  }
  inTransaction = lockTransaction;
  end_tft_write();
}