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https://github.com/pimoroni/st7735-python.git
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106 lines
4.0 KiB
Python
106 lines
4.0 KiB
Python
# Copyright (c) 2014 Adafruit Industries
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# Author: Tony DiCola
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#
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# Permission is hereby granted, free of charge, to any person obtaining a copy
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# of this software and associated documentation files (the "Software"), to deal
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# in the Software without restriction, including without limitation the rights
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# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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# copies of the Software, and to permit persons to whom the Software is
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# furnished to do so, subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be included in
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# all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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# THE SOFTWARE.
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from PIL import Image
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from PIL import ImageDraw
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from PIL import ImageFont
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import ST7735
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print("""
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shapes.py - Display test shapes on the LCD using PIL.
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If you're using Breakout Garden, plug the 0.96" LCD (SPI)
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breakout into the rear slot.
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""")
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# Create ST7735 LCD display class.
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disp = ST7735.ST7735(
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port=0,
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cs=ST7735.BG_SPI_CS_FRONT, # BG_SPI_CSB_BACK or BG_SPI_CS_FRONT
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dc=9,
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backlight=19, # 18 for back BG slot, 19 for front BG slot.
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rotation=90,
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spi_speed_hz=4000000
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)
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# Initialize display.
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disp.begin()
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WIDTH = disp.width
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HEIGHT = disp.height
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# Clear the display to a red background.
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# Can pass any tuple of red, green, blue values (from 0 to 255 each).
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# Get a PIL Draw object to start drawing on the display buffer.
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img = Image.new('RGB', (WIDTH, HEIGHT), color=(255, 0, 0))
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draw = ImageDraw.Draw(img)
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# Draw a purple rectangle with yellow outline.
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draw.rectangle((10, 10, WIDTH - 10, HEIGHT - 10), outline=(255, 255, 0), fill=(255, 0, 255))
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# Draw some shapes.
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# Draw a blue ellipse with a green outline.
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draw.ellipse((10, 10, WIDTH - 10, HEIGHT - 10), outline=(0, 255, 0), fill=(0, 0, 255))
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# Draw a white X.
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draw.line((10, 10, WIDTH - 10, HEIGHT - 10), fill=(255, 255, 255))
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draw.line((10, HEIGHT - 10, WIDTH - 10, 10), fill=(255, 255, 255))
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# Draw a cyan triangle with a black outline.
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draw.polygon([(WIDTH / 2, 10), (WIDTH - 10, HEIGHT - 10), (10, HEIGHT - 10)], outline=(0, 0, 0), fill=(0, 255, 255))
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# Load default font.
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font = ImageFont.load_default()
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# Alternatively load a TTF font.
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# Some other nice fonts to try: http://www.dafont.com/bitmap.php
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# font = ImageFont.truetype('Minecraftia.ttf', 16)
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# Define a function to create rotated text. Unfortunately PIL doesn't have good
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# native support for rotated fonts, but this function can be used to make a
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# text image and rotate it so it's easy to paste in the buffer.
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def draw_rotated_text(image, text, position, angle, font, fill=(255, 255, 255)):
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# Get rendered font width and height.
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draw = ImageDraw.Draw(image)
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width, height = draw.textsize(text, font=font)
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# Create a new image with transparent background to store the text.
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textimage = Image.new('RGBA', (width, height), (0, 0, 0, 0))
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# Render the text.
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textdraw = ImageDraw.Draw(textimage)
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textdraw.text((0, 0), text, font=font, fill=fill)
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# Rotate the text image.
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rotated = textimage.rotate(angle, expand=1)
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# Paste the text into the image, using it as a mask for transparency.
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image.paste(rotated, position, rotated)
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# Write two lines of white text on the buffer, rotated 90 degrees counter clockwise.
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draw_rotated_text(img, 'Hello World!', (0, 0), 90, font, fill=(255, 255, 255))
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draw_rotated_text(img, 'This is a line of text.', (10, HEIGHT - 10), 0, font, fill=(255, 255, 255))
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# Write buffer to display hardware, must be called to make things visible on the
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# display!
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disp.display(img)
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