65 lines
1.6 KiB
Python
65 lines
1.6 KiB
Python
"""
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This example runs on PyPortal, or any Circuit Python device
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with a built-in screen that is at least 320x240 pixels.
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It will use adafruit_bitmap_font to load a font and fill a
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bitmap with pixels matching glyphs from a given String
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"""
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import board
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import displayio
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from adafruit_bitmap_font import bitmap_font
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font = bitmap_font.load_font("fonts/Arial-16.bdf")
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bitmap = displayio.Bitmap(320, 240, 2)
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palette = displayio.Palette(2)
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palette[0] = 0x000000
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palette[1] = 0xFFFFFF
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_, height, _, dy = font.get_bounding_box()
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for y in range(height):
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pixels = []
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for c in "Adafruit CircuitPython":
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glyph = font.get_glyph(ord(c))
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if not glyph:
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continue
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glyph_y = y + (glyph.height - (height + dy)) + glyph.dy
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if 0 <= glyph_y < glyph.height:
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for i in range(glyph.width):
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value = glyph.bitmap[i, glyph_y]
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pixel = 0
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if value > 0:
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pixel = 1
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pixels.append(pixel)
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else:
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# empty section for this glyph
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for i in range(glyph.width):
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pixels.append(0)
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# one space between glyph
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pixels.append(0)
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if pixels:
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for x, pixel in enumerate(pixels):
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bitmap[x, y] = pixel
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# Create a TileGrid to hold the bitmap
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tile_grid = displayio.TileGrid(bitmap, pixel_shader=palette)
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# Create a Group to hold the TileGrid
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group = displayio.Group()
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group.x = 20
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# Add the TileGrid to the Group
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group.append(tile_grid)
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# Add the Group to the Display
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board.DISPLAY.show(group)
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while True:
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pass
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