Arduino - TFTPImageIsValid

Arduino

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TFTLibrary > TFT

## PImage.isValid

#### Description

Checks if a named instance of PImage references a valid bitmap file.

#### Syntax

image.isValid();

#### Parameters

none

#### Returns

boolean

#### 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() {
}
[Get Code]

#### See also

- image
- loadImage?()
- PImage.width()
- PImage.height()

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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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