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0.6.5.0 - 2024-03-20

Block

  • Update logic for placing right aligned text to resolve I#65. Right aligned text now appears both right aligned and visually aligned with right side of text block.

0.6.3.0 - 2024-01-07

Development Environment

  • switch from pipenv to plain requirements.txt
  • update dependencies to follow waveshare repo:
    • gpiozero
    • lgpio
    • spidev
  • add init_devel_environment.sh to create virtual environment, install requirements, and optionally add jupyter kernel.

Screen

  • add module_cleanup method for final shutdown of screen

0.6.2.0 - 2023.09.16

Block

  • explicitly remove all mutables from default value assignments in methods
    • no changes to public/private methods

Layout

  • explicitly remove all mutables from default value assignments in methods
  • deepcopy the user supplied layout into new property: _master_layout
    • resolves issue #51
    • _layout contains the calculated layout with all of the areas and absolute coordinates
    • _master_layout contains the user-supplied raw layout with relative positions
  • small internal changes to resolution method

0.6.1.2 - 2023.06.28

requirements

  • remove unneeded requests requirement

0.6.1.0 - 2023.02.25

Documentation

  • Rewrite and reformat documentation
  • Split modules into independent documents

Block

  • Add pillow_palette argument; True: map color names to RGB standard HTML color values, False (default) map color names to WaveShare values.
    • WaveShare 7 color panels use different "ORANGE" and "GREEN" values from the standard HTML color values.
  • Blocks now default to fill='BLACK and bkground='WHITE' instead of fill=0 and bkground=255
  • Fill and bkground colors appropriately map to match the block color mode
  • Resetting font size for TextBlock objects now update the font size without redefining the font path

Screen

  • colors2palette uses WaveShare R, O, Y, B, G, Blk, W values by default

Layout

  • Improve logic for determining block color mode

0.6.0.0 - 2023.02.10

Screen

  • Add "RGB" as valid value for mode property

    • This is auto-detected for all 7 Color Screens

  • Add method reduce_palette to reduce all of the colors in an image to a set palette

  • Add method colors2palette to produce a palette that can be used with the reduce_palette method

    • The default is a 7-color palette of w3 colors: 'RED', 'ORANGE', 'YELLOW', 'GREEN', 'BLUE', 'WHITE', 'BLACK'

  • Update list_compatible_modules module function to show supported mode

Layout

  • Add mode property to __init__
    • Supports "1", "RGB", "L"
  • Mode property validates value against constants.MODES and throws AttributeError
  • API Change in Layout class: add public method set_block to create or update a single block
  • API Change in Layout class: add public method update_block_props to allow changing the layout settings for a block
    • the block must be updated using update_contents after the properties are changed
  • API Change in Layout class: all Layout.layout dictionaries must now contain the key type that indicates the block type: (TextBlock, ImageBlock, DrawBlock). Failure to include this key will raise a KeyError.

Block

  • Block superclass for all block classes now supports "RGB" mode
  • All classes support the following for fill, bkground and outline
    • RGB tuples: (128, 128, 128)
    • hex 0x808080
    • integers: 8421504
    • colormap colors: "gray"- (see ImageColor.getcolor)

0.5.2.1 - 2022.12.11

  • add option to mirror screen: Screen(mirror=True)
  • Screen() now handles kwargs on init and maps them to properties

0.5.1.1 - 2022.01.16

TextBlock

  • add option to stop text wrapping (textwrap=False)
  • changed test string used for calculating maximum characters per line to include digits: 9QqMm
    • this results in all calculated font sizes being slightly smaller, but fitting better in most cases

0.5.1.0 - 2022.01.16

ImageBlock

  • add static method remove_transparency(im, bg_colour=(255, 255, 255)) to ImageBlock
    • removes alpha/transparency chanels from PNG and similar images and replaces with bg_color
  • add propery remove_alpha=True to remove transparency/alpha on PNG images by default

0.5.0.4 - 2021.08.12

Screen

  • when SPI is not enabled, writeEPD returns FileNotFoundError instead of ScreenError
    • this makes it easier to provide useful feedback to users when SPI is not setup

0.5.0.3 - 2021.08.09

  • handle exeptions when writing to EPD

0.5.0.0 - 2021.08.07

Add new Block type "DrawBlock" and Layout support

Block

  • add class "DrawBlock" for drawing ImageDraw basic shapes

    • DrawBlock blocks are useful for creating horizontal and vertical rules in Layout displays
    • supported shapes: ellipse, rounded_rectangle, rectangle
    • DrawBlock shapes can be horizontally (center, left, right) and vertically (center, top, bottom) aligned
    • all formatting paramaters can be used when drawing supported shapes

  • add option to add a border around each block type

    • Block objects accept the kwarg border_config to add borders around the top, bottom, left and right sides
    • see

  • update docstrings

  • add dummy update() method to Block parent class for completness

Layout

  • Layouts now support ImageBlock, TextBlock and DrawBlock objects
    • DrawBlock objects are included similar to Text and Image blocks, but MUST include the key "type"
      • 'type': 'DrawBlock'
    • As of epdlib v0.6, all layout sections MUST include the key "type"
      • Layout v0.5 attempts to guess the appropriate block type; this will be removed in v0.6
  • Small changes in logging output to decrease verbosity and make verbose output easier to follow

0.4.6.0 - 2021.08.05

Fix issue #15 - "unknown module" when display = "HD" and no vcom value set

0.4.5.0 - 2021.08.02

Add option to force all blocks in a layout to 1bit mode. TT Fonts are rendered with anti-aliasing in all modes except for 1bit mode. Anti-aliased fonts display poorly on 1bit screens with extremely jagged edges.

Layout

  • Layout objects now support boolean property force_onebit
    • When set to True all blocks are forced to mode = '1'

0.4.4 - 2021.07.31

rewrite of Screen module to fix unclosed SPI file handles Screen

  • initEPD() method is now depricated and no longer needed; this can be removed from the code
    • displays are automatically woken prior to write/clear and put to sleep after write/clear
    • at your own risk, use writeEPD(sleep=True) to keep display awake after write. For non-IT8951 boards, you must manually call epd.sleep() prior to the next write/clear event to ensure the SPI file handle is properly closed.
  • writeEPD() and clearEPD() methods now handle all init, write and sleep operations automatically
    • it is no longer necessary to call
  • added convenience static method list_compatible() to print list of non-IT8951 boards

0.4.3

rework of Block and Layout modules to fix padding and text scaling

Block

  • parent Block class now consumes any unknown kwargs
    • this makes it much easier to pass any values from a Layout.layout obj.
  • rewrite of text scaling to provide a cleaner image and crisper font rendering
  • add align argument to Block.TextBlock for aligning text
  • fixed various padding issues (again)
  • Switched to using multiline_text() method of ImageDraw for better leading and line spacing

Layout

  • Remove scale_x, scale_y from layouts
    • this feature was not as useful as it appeared and is a pain to maintain
  • update private methods:
    • _set_image now _set_blocks
    • removed _check_keys
    • _scalefont minor updates
  • default values for expected/necessary Layout and Block kwargs are now stored in constants.layout_defaults
  • add property mode "L" when any block is 8bit "1" when all blocks are 1bit

0.4.2

Screen

  • now supports IT8951 based panels
  • Screen.epd object is now supplied as a string, not an object
    • use epdlib.Screen.list_compatible_modules() to show compatible waveshare_epd panels
    • use Screen(epd='HD', vcom=[your IT8951 vcom (see ribon cable)] for IT8951 based panels
  • Screen.writeEPD() now supports partial refresh on IT8951 panels for partial refresh of black & white pixels
    • use writeEPD(image, partial=True)
    • partial refresh does not affect gray pixels

Block

  • now supports 8 bit grayscale images, text and background on IT8951 based panels
    • previously 8 bit images were downscaled to dithered 1 bit images; this is still the case on 1 bit panels
    • use Block.mode = "L" for 8 bit support within a block
  • now supports 8 bit fill and background on IT8951 panels
    • use Block.background=[0-255] and Block.fill=[0-255] 0 is black, 255 is fully white
  • padding now fully supported in all block types
    • previosuly only worked properly on ImageBlock objects

Layout

  • now supports the following features when specified in the layout dictionary:
    • 'fill': 0-255 specify text fill (8 bit gray 0 is black)
    • 'bkground: 0-255 specify background color (8 bit gray 0 is black)
    • 'mode': "L"/"1" specify block image mode "L" 8 bit, "1" 1 bit

0.1.1

Screen.Screen()

  • add property: rotation(int): rotate the output image by 0, 90, -90 or 180 degrees

Layout.Layout()

  • fix typos in example layout docstrings