ImgViewerJpeg

[mohammad-torabi-84]

Hi,

I have tried this example with ESP32-8048S070. but it does not show anything other than a black screen.
I confirm that the jpg file on SD card is accessible from the sketch, but the jpegDrawCallback function never run (I uncomment the Serial.printf line).

Any suggestion??

`#define JPEG_FILENAME "/octocat.jpg"

#include <Arduino_GFX_Library.h>

#define TFT_BL 2
Arduino_ESP32RGBPanel *rgbpanel = new Arduino_ESP32RGBPanel(41, 40, 39, 42, 14, 21, 47, 48, 45, 9 , 46, 3, 8, 16, 1, 15, 7, 6, 5, 4, 0, 180, 30, 16, 0, 12, 13, 10);
Arduino_RGB_Display *gfx = new Arduino_RGB_Display(800, 480, rgbpanel);

#include <LittleFS.h>
#include <SD.h>

#include "JpegFunc.h"

// pixel drawing callback
static int jpegDrawCallback(JPEGDRAW *pDraw) {
//Serial.println("Draw pos = " + String(pDraw->x) + "," + String(pDraw->y) + ". size = " + String(pDraw->iWidth) + " x " + String(pDraw->iHeight));
Serial.println("jpegDrawCallback");
gfx->draw16bitBeRGBBitmap(pDraw->x, pDraw->y, pDraw->pPixels, pDraw->iWidth, pDraw->iHeight);
return 1;
}

void setup() {
Serial.begin(115200);
Serial.println("JPEG Image Viewer");

if (!gfx->begin()) {
Serial.println("gfx->begin() failed!");
}
gfx->fillScreen(BLACK);

pinMode(TFT_BL, OUTPUT);
digitalWrite(TFT_BL, HIGH);

Serial.println("2: !SD.begin()");
if (!SD.begin()) {
Serial.println(F("ERROR: File System Mount Failed!"));
gfx->println(F("ERROR: File System Mount Failed!"));
}
else {
File root = SD.open("/");
if(!root){
Serial.println("Failed to open directory");
return;
}
if(!root.isDirectory()){
Serial.println("Not a directory");
return;
}
File file = root.openNextFile();
while(file) {
if(file.isDirectory()) {
}
else {
if (((String)("/") + (String)file.name()) == (String)JPEG_FILENAME) {
Serial.print(" FILE: ");
Serial.print(file.name());
Serial.print(" SIZE: ");
Serial.println(file.size());
}
else {
Serial.print((((String)("/") + (String)file.name())).c_str());
Serial.println(".");
Serial.print(JPEG_FILENAME);
Serial.println(".");
}
}
file = root.openNextFile();
}
unsigned long start = millis();
jpegDraw(
JPEG_FILENAME,
jpegDrawCallback,
true /* useBigEndian /,
0 / x /,
0 / y /,
gfx->width() / widthLimit /,
gfx->height() / heightLimit */
);
Serial.printf("Time used: %lu\n", millis() - start);
}

delay(5000);
}

void loop() {
}`