Bitmap [electron+photon]

Bitmap class to load a Windows BMP into a SSD1351 OLED display

Features

• Reads 16/24 bits Windows BMP (uncompressed)
• Compatible with Adafruit_SSD1351 driver

Dependencies

• Adafruit_SSD1351_Photon
• Adafruit_mfGFX
• SdFat

Usage

char *filename` // path to a Windows BMP _16bits_ file on your SDCard
Adafruit_SSD1351 display(...) // your current display

setup() {
    Bitmap bitmap = Bitmap(&display,filename);
    bitmap.draw(x,y);
    ...
    SdFile bmpFile;
    bmpFile.open(filename, O_READ);
    Bitmap bitmap2 = Bitmap(&display,bmpFile);
    bitmap2.draw(x,y);
}

Notes

• image is loaded into memory first, then written to display ram through SPI
• because of the use of display SPI commands, the code won't work as is with another type of display
• if you use custom fonts (e.g. Arial8) within your project, you have to copy this library locally and update fonts.h accordingly

Possible future improvements

• Reading compressed formats
• Reading 32bits BMP files
• Reading PNG and JPG files
• use callbacks for display off/on, to make it compatible with the GFX lib, rather than the hardware display driver

changelog

• 0.0.2: removed serial linefeeds sent while loading the picture
• 0.0.3: color fix (0.0.2 was not working) + handling 24 bits bitmaps + loading pictures in memory, then writing to display ram directly
• 0.0.4: fixed dependencies
• 0.0.5: fixed R,G,B order inversion in 24bits bitmaps :/