Converts the specified image to an image that fits the X (formerly Twitter) header[^1].

The following two images are generated.

• An image with opacity only.
• An image that is not only opacified but also resized and margins are added to fit the X (formerly Twitter) header.

The default file names are opaque.png and header.png respectively. The settings can be changed by specifying the configuration file described bellow.

Installation

Run the following command to install.

cargo install rating-graph-processor

Usage

Specify the original image and the output directory as arguments.

The help message when you run rating-graph-processor -h is as follows.

Converts the specified image to an image that fits the X (formerly Twitter) header

Usage: rating-graph-processor [OPTIONS] <ORIGINAL_IMAGE> <OUTPUT_DIR>

Arguments:
  <ORIGINAL_IMAGE>  Original image
  <OUTPUT_DIR>      Output directory for processed images

Options:
  -c, --config <CONFIG>  Configuration file
      --header-only      If this flag is specified, only images processed for headers will be generated. An image that has only been opaque will not be generated
  -h, --help             Print help
  -V, --version          Print version

Configuration

The following settings are available.

You can specify a configuration file using the --config option. The configuration file is written in TOML format, and each setting is written in the settings table.

The following is an example of a configuration file.

[settings]

# Filename of the image with opaque processing only.
# Default: opaque.png
opaque_image = "opaque.png"

# Filename of the processed for the X (formerly Twitter) header.
# Default: header.png
header_image = "header.png"

# Type of sampling filter to use when resizing the image.
# Available filters: [Nearest, Triangle, CatmullRom, GAussian, Lanczos3]
# Default: CatmullRom
filter = "CatmullRom"

[^1]: The header image size is 1500x500.