GetWriteableImageFormats

Returns an array of writeable image formats supported by the underlying Java ImageIO library. This BIF is useful for determining which image formats can be written (exported) in BoxLang on the current platform.

Syntax

GetWriteableImageFormats()

Arguments

This BIF does not accept any arguments.

Returns

• Array: An array of strings, each representing a writeable image format name (e.g., "png", "jpg", "gif").

Description

GetWriteableImageFormats queries the Java ImageIO subsystem for all image formats that can be written (encoded) in the current environment. The returned array contains the format names as strings. This is useful for dynamically checking which image types are supported for writing, especially in environments where available formats may vary.

Example

formats = GetWriteableImageFormats();
// formats might be ["BMP", "GIF", "JPEG", "PNG", "TIFF", "WEBP"]

See Also

• GetReadableImageFormats
• ImageWrite
• ImageWriteBase64

Notes

• The list of formats depends on the Java runtime and any installed ImageIO plugins.
• BoxLang's ImageWrite auto-detects the output format from the file extension and writes to any registered ImageIO format.
• Common writable formats include "png", "jpg", "gif", "webp", "bmp", "tiff", but may include others depending on the environment.
• Images with alpha channels written to formats without transparency support (JPEG, BMP) are automatically composited onto a white background.