Displaying images on st7789 display from sd card

[loveofsparks]

hi! im running arduino on an esp32 wired to an sd card and a tft display. my hardware is working fine, ive managed to read/write to the sd and the display. the issue is: my sd card contains an rgb565 array, but when i use the sd library to read it, it returns it as a string. the display library TFT_ESPI can only draw images from an uint16_t array, not a string. any ideas how i can display the rgb565 string onto the tft? my code:

#include <TFT_eSPI.h>                 // Include the graphics library (this includes the sprite functions)
//#include "vid.h"

TFT_eSPI tft = TFT_eSPI();         // Declare object "tft"


#include <SD.h>
#include <sd_defines.h>
#include <sd_diskio.h>


#include <dummy.h>
File myFile;
SPIClass SPISD(HSPI);
String inString;  //need to use Strings because of the ESP32 webserver
void setup(){
  Serial.begin(115200);
  Serial.println();
tft.begin();     // i
  // Initialise the TFT registers
  tft.init();

  // Optionally set colour depth to 8 or 16 bits, default is 16 if not spedified
  // spr.setColorDepth(8)
   tft.setSwapBytes(true); // Swap the byte order for pushImage() - corrects endianness
pinMode(25,OUTPUT);
  digitalWrite(25,HIGH);
    SPISD.begin(14,5,13);
    if (!SD.begin(15,SPISD)) {  //SD_CS_PIN this pin is just the dummy pin since the SD need the input 
    Serial.println(F("failed!"));
    return;
    }
    else Serial.println(F("SD read!"));
  
  myFile = SD.open("/test.txt", "r"); //read from file
  if (myFile)
  {
    Serial.println("test.txt:");
    
    while (myFile.available())
    {
      inString = myFile.readString();
    }
    myFile.close();
   
    Serial.println(inString);//inside the string is the rgb array, it looks like: 0x0000, 0x0000, 0x0000,.......
  }
  else
  {
    Serial.println("error opening test.txt to read");
  }
}





void loop(void)
{
 
   tft.pushImage(0,0,240,176,inString);
  }