changing example script to simpletest
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FoamyGuy
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2 changed files with 12 additions and 180 deletions
12
examples/display_text_bitmap_label_simpletest.py
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12
examples/display_text_bitmap_label_simpletest.py
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import board
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import terminalio
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from adafruit_display_text import bitmap_label
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text = "Hello world"
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text_area = bitmap_label.Label(terminalio.FONT, text=text)
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text_area.x = 10
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text_area.y = 10
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board.DISPLAY.show(text_area)
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while True:
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pass
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# Sample for comparing label and bitmap_label memory usage with Builtin or loaded BDF fonts
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import gc
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import time
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import board
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import displayio
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import terminalio
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# pylint: disable=no-member
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##########
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# Use these Boolean variables to select the text display library and which font style to use
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##########
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use_bitmaplabel = True # Set True if to use 'bitmap_label.py'
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# Set False to use 'label.py' library
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##########
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use_builtinfont = True # Set True to use the terminalio.FONT BuiltinFont,
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# Set False to use a BDF loaded font, see "fontFiles" below
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##########
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my_scale = 1
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if use_bitmaplabel: # use bitmap_label.py library (Bitmap)
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from adafruit_display_text import bitmap_label as label
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version = "bitmap_label.py"
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else: # use label.py library (TileGrid)
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from adafruit_display_text import label
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version = "label.py"
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# Setup the SPI display
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if "DISPLAY" not in dir(board):
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# Setup the LCD display with driver
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# You may need to change this to match the display driver for the chipset
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# used on your display
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from adafruit_ili9341 import ILI9341
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displayio.release_displays()
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# setup the SPI bus
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spi = board.SPI()
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tft_cs = board.D9 # arbitrary, pin not used
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tft_dc = board.D10
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tft_backlight = board.D12
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tft_reset = board.D11
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while not spi.try_lock():
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spi.configure(baudrate=32000000)
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spi.unlock()
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display_bus = displayio.FourWire(
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spi,
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command=tft_dc,
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chip_select=tft_cs,
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reset=tft_reset,
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baudrate=32000000,
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polarity=1,
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phase=1,
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)
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# Number of pixels in the display
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DISPLAY_WIDTH = 320
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DISPLAY_HEIGHT = 240
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# create the display
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display = ILI9341(
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display_bus,
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width=DISPLAY_WIDTH,
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height=DISPLAY_HEIGHT,
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rotation=180, # The rotation can be adjusted to match your configuration.
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auto_refresh=True,
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native_frames_per_second=90,
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)
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# reset the display to show nothing.
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display.show(None)
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else:
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# built-in display
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display = board.DISPLAY
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print("Display is started")
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# load all the fonts
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print("loading fonts...")
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# Setup file locations for BDF font files
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font_files = [
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"fonts/Helvetica-Bold-16.bdf",
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# 'fonts/BitstreamVeraSans-Roman-24.bdf',
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# 'fonts/BitstreamVeraSans-Roman-16.bdf',
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# 'fonts/Fayette-HandwrittenScript-64.bdf',
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]
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font_list = []
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for i, font_file in enumerate(font_files):
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if use_builtinfont:
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this_font = (
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terminalio.FONT
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) # comment this out to switch back to BDF loaded fonts
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else:
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from adafruit_bitmap_font import bitmap_font
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this_font = bitmap_font.load_font(font_file)
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font_list.append(this_font)
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preload_the_glyphs = (
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True # set this to True if you want to preload the font glyphs into memory
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)
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# preloading the glyphs will help speed up the rendering of text but will use more RAM
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if preload_the_glyphs:
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# identify the glyphs to load into memory -> increases rendering speed
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glyphs = b"0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ-,.:?! "
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print("loading glyphs...")
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for font in font_list:
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if font is not terminalio.FONT:
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font.load_glyphs(glyphs)
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print("Glyphs are loaded.")
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print("Fonts completed loading.")
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# create group
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gc.collect()
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print("After creating Group, Memory free: {}".format(gc.mem_free()))
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my_string = "Welcome to using displayio on CircuitPython!"
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gc.collect()
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label_start_memory = gc.mem_free()
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start_time = time.monotonic()
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bmap_label = label.Label(
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font=font_list[0],
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text=my_string,
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color=0xFFFFFF,
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max_glyphs=len(my_string),
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background_color=0xFF0000,
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padding_bottom=0,
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padding_left=0,
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padding_right=0,
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padding_top=0,
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background_tight=False,
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x=10,
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y=30,
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line_spacing=1.25,
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scale=my_scale,
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)
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end_time = time.monotonic()
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gc.collect()
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label_end_memory = gc.mem_free()
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bmap_group = displayio.Group(max_size=1) # Create a group for displaying
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bmap_group.append(bmap_label)
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print("***")
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print("{} memory used: {}".format(version, label_start_memory - label_end_memory))
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print("{} time to process: {} seconds".format(version, end_time - start_time))
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display.auto_refresh = True
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display.show(bmap_group)
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while True:
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pass
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