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Example code of componenta/image-converter

Informations about the package image-converter

Componenta Image Converter

Image conversion contracts and GD-backed image converters for Componenta. The package keeps low-level GD calls behind small contracts and provides an ImageConverter orchestrator that selects a target converter by requested output type and validates the source MIME type through componenta/mimetype-detector.

Requirements

Installation

The package declares Componenta\Image\ConfigProvider in extra.componenta.config-providers. When componenta/composer-plugin is installed, the provider is added to the generated provider list automatically.

Main API

ImageConverterInterface is the low-level contract implemented by single-target converters:

ImageConverter is the orchestrator for application code that needs to choose the target format at runtime:

$source may be a binary string or Psr\Http\Message\StreamInterface. Target types accept short names and MIME types, for example webp, image/webp, jpg, jpeg, image/jpeg, png, and image/avif.

Built-In Converters

Converter Target Supported source MIME types
GdWebPConverter webp, image/webp JPEG, PNG, BMP. GIF is intentionally not supported because GD would drop animation.
GdJpegConverter jpeg, jpg, image/jpeg PNG, WebP, AVIF, BMP. Alpha is flattened onto a white background.
GdPngConverter png, image/png JPEG, WebP, AVIF, BMP. Alpha is preserved when available.
GdAvifConverter avif, image/avif JPEG, PNG, WebP, BMP when the local GD build supports imageavif().

For JPEG, WebP, and AVIF, quality is 0..100. For PNG, the same quality range is mapped to GD compression level 0..9.

Extension Points

Implement ImageConverterInterface for a new backend or target format. If the converter also implements ImageConversionTargetsProviderInterface, the orchestrator can read its conversionTargets property automatically:

Converters can be added after construction:

When target types are passed explicitly to addConverter(), they override the optional provider property for registration.

Failure Model

ImageConverter throws ConversionException when:

Treat conversion as an infrastructure boundary: validate upload constraints before conversion and handle conversion failure as a user-facing invalid media error.

DI Registration

ConfigProvider registers:

ImageConverterFactory uses MimeTypeDetectorInterface from the container when available and falls back to FinfoDetector.

All versions of image-converter with dependencies

PHP Build Version
Package Version
Requires php Version ^8.4
ext-gd Version *
componenta/mimetype-detector Version ^1.0
psr/container Version ^2.0
psr/http-message Version ^2.0
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