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TFTLibrary > TFT

loadImage

Description

Loads an image file from the SD card into a named instance of PImage. The TFT library has the ability to read .bmp files off the root of a SD card and display them on the screen. Images can be smaller or larger than the screen resolution (160x128), but there is no method on the Arduino for image manipulation. The images should be sized before you put them on the SD card. The TFT library has the ability to read .bmp files off the root of a SD card and display them on the screenIt is possible to load 24 bit bmp image only.

Syntax

screen.loadImage(name);

Parameters

  • name : char array, the name of the image from the SD card you wish to read

Returns

The loaded image

Example

// this example looks for a file named "logo.bmp"
//  on the SD card, and renders it to the screen
#include <Esplora.h>
#include <SD.h>
#include <SPI.h>
#include <TFT.h>            // Arduino TFT library

#define SD_CS    8  // Chip select line for SD card in Esplora

PImage logo;

void setup() {
  // initialize the screen
  EsploraTFT.begin();
  // initialize the SD card
  SD.begin(SD_CS);
  // set the background the black
  EsploraTFT.background(0, 0, 0);

  // load the image into the named instance of PImage
  logo = EsploraTFT.loadImage("arduino.bmp");

  // if it is a valid image file, turn the Esplora's LED green
   if (logo.isValid()) {
       Esplora.writeGreen(255);
  }
  else{
  // if it is not valid, turn the LED red
    Esplora.writeRed(255);
  }

  // draw the image on the screen starting at the top left corner
  EsploraTFT.image(logo, 0, 0);

}

void loop() {

}
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See also

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The text of the Arduino reference is licensed under a Creative Commons Attribution-ShareAlike 3.0 License. Code samples in the reference are released into the public domain.

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