=============================
Playing around with raw color
=============================

::

    from chafa import *

    # Create config
    config = CanvasConfig()

    config.width = 36
    config.height = (256 - (16+24))  // 36 + 2


    config.canvas_mode = CanvasMode.CHAFA_CANVAS_MODE_INDEXED_256

    # Init an empty canvas
    pixels = [0, 0, 0, 0]

    canvas = Canvas(config)
    canvas.draw_all_pixels(
        PixelType.CHAFA_PIXEL_RGBA8_PREMULTIPLIED,
        pixels,
        1, 1, 3
    )

    # Draw all 256 colors

    # Set the characters to half blocks
    for row in canvas[:]:
        for pix in row:
            pix.char = "▀"
            pix.remove_foreground()

    
    # Draw the primary 16
    for pix in canvas[0,:16]:
        pix.raw_fg_color = pix.x

    # Draw the rest of the colors
    for row in canvas[1:-1, :]:
        for pix in row:
            pix.raw_fg_color = pix.x + 16 + ((pix.y-1) * 5 * config.width//5)

    # Draw the greyscale gradient
    for pix in canvas[-1, :24]:
        pix.raw_fg_color = 255 - (23 - pix.x)

    print(canvas.print().decode())


.. _`MagickWand`: https://imagemagick.org/script/magick-wand.php
.. _`Pillow`: https://python-pillow.org/
.. _`pyvips`: https://github.com/libvips/pyvips
.. _`GitHub repo`: https://github.com/guardkenzie/chafa.py
.. _`JetBrains Mono`: https://www.jetbrains.com/lp/mono/
.. _`index`: https://chafapy.mage.black