Scaling for dithered images?

[Sarah-C]

Hi!

I checked why my dithered image wasn't scaling, and I think it's because it's not supported?

Is there a way of scaling the jpg, then running the ditherer?

 // Too big? Then scale.
  uint8_t scaling = 0; // Get's or'd with options for the following:
  uint8_t options = 0;
  /*Decoder options
    JPEG_AUTO_ROTATE 1
    JPEG_SCALE_HALF 2
    JPEG_SCALE_QUARTER 4
    JPEG_SCALE_EIGHTH 8
    JPEG_LE_PIXELS 16
    JPEG_EXIF_THUMBNAIL 32
    JPEG_LUMA_ONLY 64
  */
  if (width > 960 || height > 540) {
    // Try half size.
    width >>= 1;
    height >>= 1;
    Serial.println("Trying half size:");
    Serial.println(width);
    Serial.println(height);
    scaling = JPEG_SCALE_HALF;
    if (width > 960 || height > 540) {
      // Try quarter size.
      width >>= 1;
      height >>= 1;
      scaling = JPEG_SCALE_QUARTER;
      Serial.println("Trying quarter size:");
      Serial.println(width);
      Serial.println(height);
      if (width > 960 || height > 540) {
        // Try eigth size.
        width >>= 1;
        height >>= 1;
        scaling = JPEG_SCALE_EIGHTH;
        Serial.println("Trying eighth size:");
        Serial.println(width);
        Serial.println(height);
        if (width > 960 || height > 540) {
          Serial.println("Still too big after scaling attempt, skipping.");
          // Still too big, cancel operation, and don't pause for any length of time for next image.
          waitingTime = 1;
          return;
        } // Too big.
      } // Eighth size.
    } // Quarter size.
  } // Half size.
  // For when this image is smaller than the last - make sure no old image can be seen on the boundaries.
  canvas.fillCanvas(15);
  offsetX = (960 - width) >> 1;
  offsetY = (540 - height) >> 1;
  jpeg.setPixelType(FOUR_BIT_DITHERED);
  jpeg.decodeDither(ditherSpace, options || scaling);
  jpeg.close();

[Sarah-C]

made by mistake. I thought I closed the page without posting. (was my code)