sgf2anim

A Python script that can turn an .sgf file for the game of Go/Baduk/Weiqi into a diagram image that's either static or animated.

Installation

pip install pillow imageio

pillow is used for graphics rendering.

imageio is used for building animated GIF files.

Creating a Diagram

Static

import sgf2anim
sgf_path = "my-sgf.sgf"
sgf2anim.get_settings().set_for_static_diagram()
sgf2anim.save_diagram(sgf_path, save_as_static=True, path_addon="_output")

This will create a static diagram and save it as "my-sgf_output.png" in the same directory.

Animated

import sgf2anim
sgf_path = "capturing-race.sgf"

sgf2anim.save_diagram(
    sgf_path,
    save_as_static=False,
    frame_delay_ms=1200,
    start_freeze_ms=3000,
    end_freeze_ms=10000,
    number_display_ms=1200,
    path_addon="_output",
)

• sgf_path provides the path for the SGF file to process.
• frame_delay_ms is the duration that one node in the SGF will be shown.
• start_freeze_ms is the duration of the first frame.
• end_freeze_ms is the duration of the last frame.
• number_display_ms is the duration of the frame_delay_ms that will show the move number (or placement marker) on the stone.
• path_addon is a string that will be added to the output file name (which will be sgf_path with the extension stripped).

Multiple Files at Once

import sgf2anim
sgf_dir = "directory"

sgf2anim.process_directory(
    sgf_dir,
    frame_delay_ms=1500,
    start_freeze_ms=3000,
    end_freeze_ms=10000,
    number_display_ms=1000,
    path_addon="_output",
)

The process_directory function will find any SGF files in the given directory and create both a static and animated diagram for all of them. If an SGF file doesn't contain any played moves, then an animated diagram will not be created.

Styling

Default Profiles

sgf2anim.get_settings().set_for_static_diagram() will change the settings to render all the move numbers and not remove captured stones from the diagram.

sgf2anim.get_settings().set_for_animated_diagram() will change the settings to render each placed stone with a temporary placement marker. Captures will be removed.

Custom Theme

import sgf2anim

# defines the graphics directory under sgf2anim/_res to use and the styling properties.
sgf2anim.get_settings().STYLE_NAME = "frost"
sgf2anim.get_settings().DIGIT_TEXT_SCALE_FACTOR = 0.32
sgf2anim.get_settings().LEFTWARD_ONE_CLIP_FACTOR = -0.05
sgf2anim.get_settings().LINE_COLOR = (75, 107, 155)
sgf2anim.get_settings().LINE_THICKNESS = 1.2
sgf2anim.get_settings().MARKER_COLOR = (46, 84, 105)

sgf_path = "false-eyes"
sgf2anim.save_diagram(sgf_path, save_as_static=True, path_addon="_frost")

Settings

sgf2anim contains _settings.py, which defines a Settings object whose member attributes determine how diagrams will be rendered. sgf2anim.get_settings() can be used to retrieve the Settings object and modify its properties before running rendering processes.

for the resolution of the output images:

• MAX_WIDTH provides the maximum width of an output diagram image.
• MAX_HEIGHT provides the maximum height of an output diagram image.
• IMAGE_MARGIN provides the relative margin around the displayed stones.
• MIN_CELL_SIZE provides the smallest size of a graphic that can be used.
• MAX_CELL_SIZE provides the largest size of a graphic that can be used.

for the appearance of move numbers on stones:

• SHOW_STONE_NUMBERS, if True, will display a move number/placement marker on the last placed stone.
• MAINTAIN_STONE_NUMBERS, if True, will permanently keep the move number/placement marker on the last placed stone.
• MAINTAIN_NUMBERS_AT_END, if True, will permanently keep the move number/placement marker on the final placed stone.
• MARKER_INSTEAD_OF_NUMBERS, if True, will show a placement marker graphic on the stone instead of the move number.
• LABEL_TEXT_SCALE is the scale of displayed label on an intersection.
• NUMBER_TEXT_SCALE is the scale of displayed move number on a stone.
• DIGIT_TEXT_SCALE_FACTOR is added to the NUMBER_TEXT_SCALE for every digit beyond the first digit.
• LEFTWARD_ONE_CLIP_FACTOR is the percentage of the move number text image that will be clipped off the left side if the left-most digit is "1" and the move number is not a single digit. This is for accomodating different fonts.
• CENTER_LABELS_VERTICALLY, if True, will vertically center letter labels on their intersections.
• LETTERS_PADDING_BOTTOM_PERCENT is the percentage of the label text image's height that will be added to the bottom of the image for ideal alignment.
• NUMBERS_PADDING_BOTTOM_PERCENT is the percentage of the move number text image's height that will be added to the bottom of the image for ideal alignment.

for the color and line styling:

• STYLE_NAME is the name of the directory contained in sgf2anim/_res whose graphics will be loaded.
• LINE_COLOR is the RGB for the Go board's lines.
• LINE_THICKNESS is the relative thickness of the Go board's lines.
• MARKER_COLOR is the RGB for the annotation shapes.
• LABEL_COLOR is the RGB for the letter label annotations displayed on intersections.
• PLACEMENT_MARKER_COLOR is the RGB for the stone placement marker.
• NUMBER_COLOR_FOR_BLACK is the RGB for the move number text appearing on a black stone.
• NUMBER_COLOR_FOR_WHITE is the RGB for the move number text appearing on a white stone.
• ANNOTATE_LINE_COLOR is the RGB used for annotative lines.
• ANNOTATE_LINE_THICKNESS is the relative thickness of annotative lines.

for other rendering options:

• DISPLAY_PADDING specifies how many empty intersections should surround the displayed stones.
• FORCE_STONES_CENTER, if True, will change the stone graphic size on a case-by-case basis in order to make them perfectly centered with the Go board's lines.
• RENDER_CAPTURES, if True, will clear captured stones from the diagram.