part1_BBB_TFT_fonts.py

import Image
import ImageDraw
import ImageFont

import Adafruit_ILI9341 as TFT
import Adafruit_GPIO as GPIO
import Adafruit_GPIO.SPI as SPI

font = ImageFont.truetype('Minecraftia.ttf', 16)

# Define a function to create rotated text.  Unfortunately PIL doesn't have good
# native support for rotated fonts, but this function can be used to make a 
# text image and rotate it so it's easy to paste in the buffer.
def draw_rotated_text(image, text, position, angle, font, fill=(255,255,255)):
	# Get rendered font width and height.
	draw = ImageDraw.Draw(image)
	width, height = draw.textsize(text, font=font)
	# Create a new image with transparent background to store the text.
	textimage = Image.new('RGBA', (width, height), (0,0,0,0))
	# Render the text.
	textdraw = ImageDraw.Draw(textimage)
	textdraw.text((0,0), text, font=font, fill=fill)
	# Rotate the text image.
	rotated = textimage.rotate(angle, expand=1)
	# Paste the text into the image, using it as a mask for transparency.
	image.paste(rotated, position, rotated)

# Write two lines of white text on the buffer, rotated 90 degrees counter clockwise.
draw_rotated_text(disp.buffer, 'Hello World!', (150, 120), 90, font, fill=(255,255,255))
draw_rotated_text(disp.buffer, 'This is a line of text.', (170, 90), 90, font, fill=(255,255,255))

# Write buffer to display hardware, must be called to make things visible on the
# display!
disp.display()