Code Reference Map

When to Use

Use this when you need to find the authoritative source code for image style and responsive image functionality.

Class	Path	Purpose
`ImageStyle`	core/modules/image/src/Entity/ImageStyle.php	Image style config entity
`ResponsiveImageStyle`	core/modules/responsive_image/src/Entity/ResponsiveImageStyle.php	Responsive image style config entity

Plugin ID	Class Path	Purpose
`image_resize`	core/modules/image/src/Plugin/ImageEffect/ResizeImageEffect.php	Exact dimensions resize
`image_scale`	core/modules/image/src/Plugin/ImageEffect/ScaleImageEffect.php	Aspect-ratio preserving scale
`image_scale_and_crop`	core/modules/image/src/Plugin/ImageEffect/ScaleAndCropImageEffect.php	Scale then crop to exact size
`image_crop`	core/modules/image/src/Plugin/ImageEffect/CropImageEffect.php	Crop without scaling
`image_convert`	core/modules/image/src/Plugin/ImageEffect/ConvertImageEffect.php	Format conversion
`image_convert_avif`	core/modules/image/src/Plugin/ImageEffect/AvifImageEffect.php	AVIF conversion with fallback
`image_rotate`	core/modules/image/src/Plugin/ImageEffect/RotateImageEffect.php	Rotate by degrees
`image_desaturate`	core/modules/image/src/Plugin/ImageEffect/DesaturateImageEffect.php	Grayscale conversion

Class	Path	Purpose
`ImageEffectInterface`	core/modules/image/src/ImageEffectInterface.php	Effect plugin interface
`ImageEffectBase`	core/modules/image/src/ImageEffectBase.php	Non-configurable effect base
`ConfigurableImageEffectBase`	core/modules/image/src/ConfigurableImageEffectBase.php	Configurable effect base
`ImageEffectPluginCollection`	core/modules/image/src/ImageEffectPluginCollection.php	Effect collection
`ImageEffectManager`	core/modules/image/src/ImageEffectManager.php	Effect plugin manager

Formatter ID	Class Path	Purpose
`image`	core/modules/image/src/Plugin/Field/FieldFormatter/ImageFormatter.php	Standard image formatter
`image_url`	core/modules/image/src/Plugin/Field/FieldFormatter/ImageUrlFormatter.php	URL-only formatter
`responsive_image`	core/modules/responsive_image/src/Plugin/Field/FieldFormatter/ResponsiveImageFormatter.php	Responsive image formatter

Class	Path	Purpose
`ImageStyleForm`	core/modules/image/src/Form/ImageStyleEditForm.php	Style edit form
`ImageStyleAddForm`	core/modules/image/src/Form/ImageStyleAddForm.php	Style add form
`ImageStyleDeleteForm`	core/modules/image/src/Form/ImageStyleDeleteForm.php	Style delete form
`ImageStyleFlushForm`	core/modules/image/src/Form/ImageStyleFlushForm.php	Derivative flush form
`ResponsiveImageStyleForm`	core/modules/responsive_image/src/ResponsiveImageStyleForm.php	Responsive style form

Class	Path	Purpose
`ImageStyleStorage`	core/modules/image/src/ImageStyleStorage.php	Image style storage handler
`ImageToolkitManager`	core/lib/Drupal/Core/ImageToolkit/ImageToolkitManager.php	Toolkit plugin manager (GD, ImageMagick)
`ImageFactory`	core/lib/Drupal/Core/Image/ImageFactory.php	Image object factory
`BreakpointManager`	core/lib/Drupal/Core/Breakpoint/BreakpointManager.php	Breakpoint discovery/management

File	Path	Purpose
`image.schema.yml`	core/modules/image/config/schema/image.schema.yml	Image style config schema
`responsive_image.schema.yml`	core/modules/responsive_image/config/schema/responsive_image.schema.yml	Responsive image config schema

File	Path	Purpose
`image.style.thumbnail.yml`	core/modules/image/config/install/image.style.thumbnail.yml	Default thumbnail style
`image.style.medium.yml`	core/modules/image/config/install/image.style.medium.yml	Default medium style
`image.style.large.yml`	core/modules/image/config/install/image.style.large.yml	Default large style
`responsive_image.styles.wide.yml`	core/profiles/standard/config/optional/responsive_image.styles.wide.yml	Wide responsive style
`olivero.breakpoints.yml`	core/themes/olivero/olivero.breakpoints.yml	Olivero theme breakpoints

File	Path	Purpose
`recipe.yml`	core/recipes/standard_responsive_images/recipe.yml	Responsive images recipe