Anybody get drawJpgFile to work with M5 PaperS3?

wsanders

Anybody get drawJpgFile and SPIFFS to work with M5 PaperS3? The following program finds the file "badge.jpg" but the jpeg is not displayed. I have turned jpg optimization and progressive off since that has been a source of problems in the past:

#include <epdiy.h>
#include <SPIFFS.h>
#include <M5GFX.h>

M5GFX display;

void setup(void)
{ 
  display.init();
  display.startWrite();
  display.fillScreen(TFT_WHITE);
  display.setTextSize(5.0);
  if (display.isEPD())
  { 
    display.setEpdMode(epd_mode_t::epd_fastest);
  }
  // eyelet at top
  display.setRotation(display.getRotation() ^ 2);
  
  display.println("I RUN");
  if(!SPIFFS.begin(true)){
    display.println("An Error has occurred while mounting SPIFFS");
  }
  display.println("SPIFFS OK");
  File file = SPIFFS.open("/badge.jpg");
  if(!file){
    display.println("Failed to open file");
  }
  file.close();
  display.println("Open OK");
  
  display.drawJpgFile(SPIFFS, "/badge.jpg" , 0, 0);
  display.display();
}

If I cant get drawJpgFile to work, has someone written a script to put the result in a const array such as in the example file at https://github.com/m5stack/M5GFX/blob/2c12f148d6e3df64ead33b04c7989fe6d90a7a83/examples/Basic/drawImageData/drawImageData.ino?

wsanders

This is probably a problem with SPIFFs. If I change the file open to

  File file = SPIFFS.open("/NONEXISTENT");

the open still succeeds even though the file doesn't exist.So I have no way to know if drawJpgFile even works or not.

wsanders

Now that I think of it, I could not get drawJpgFile to work in a previous project (a fake Nixie watch), and I see from the PaperS3 demo program sample code that the Jpg is stored as a static array.

I got my simple badge display program to work by storing the image as a C array (exported from GIMP) and walking through the pixels, which is how I did it in my previous project. Suprisingly it's not incredibly slow but of course data in this format is incredibly bulky.

This github code is an example of how to convert a file into a statoc C array: https://github.com/notisrac/FileToCArray

In the next few days, maybe I'll figure out if SPIFFS works on the PaperS3 and report back.

wsanders

@wsanders Bump. For future reference, the easiest way to get a static image into Arduino IDE code is to convert the image into an XBM with Gimp and use M5.Display.drawXBitmap. More here: https://github.com/wsanders/M5PaperS3-Stuff