The last 7 columns cannot display with a jpg picture. You can easily reproduce the pro

still not work. I try to fix the error. what I do: <div class="snippet-cli

st7789 135x240 cannot display jpg picture completely. about arduino_gfx HOT 6 CLOSED

Eddddddddy commented on July 2, 2024

st7789 135x240 cannot display jpg picture completely.

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Comments (6)

moononournation commented on July 2, 2024

Yes, I know this behavior. The drawBitmap functions simply skip drawing if the drawing block not all inside the display area. The simplest workaround is change the height to 136:

Arduino_ST7789 *gfx = new Arduino_ST7789(bus, TFT_RST, 0 /* rotation */, true /* IPS */, 136 /* width */, 240 /* height */, 53 /* col offset 1 */, 40 /* row offset 1 */, 51 /* col offset 2 */, 40 /* row offset 2 */);

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Eddddddddy commented on July 2, 2024

thanks for that.
By the way, is there a method that I could draw the block by 68x8? That is more efficiency, I guess.

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moononournation commented on July 2, 2024

I have committed some handling on incomplete drawing in jpegDrawCallback(), please pull latest version to take a look.

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Eddddddddy commented on July 2, 2024

still not work.
I try to fix the error.
what I do:

static int jpegDrawCallback(JPEGDRAW *pDraw)
{
// Serial.printf("Draw pos = %d,%d. size = %d x %d\n", pDraw->x, pDraw->y, pDraw->iWidth, pDraw->iHeight);
  if (pDraw->x <= gfx->width())
  {
    int16_t w = pDraw->iWidth;    //that should be width, not height
    if ((pDraw->x + w) >= gfx->width())
    {
      w = gfx->width() - pDraw->x;
    }
    Serial.printf("Draw pos = %d,%d. size = %d x %d\n", pDraw->x, pDraw->y, w, pDraw->iHeight);
    gfx->draw16bitBeRGBBitmap(pDraw->x, pDraw->y, pDraw->pPixels, w, pDraw->iHeight);
    return 1;
  }
  return 1;   //if return 0, it will be stop drawing.
}

but the the pixels of last serval columns are dislocation. the image is not right.