Joomla! API

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Image

Class to manipulate an image.

since

1.7.3
package

Application

Methods

__construct

Class constructor.

__construct(mixed source = null) : mixed
since

1.7.3
throws

\RuntimeException

Arguments

source

mixedEither a file path for a source image or a GD resource handler for an image.

Response

mixed

__destruct

Method to call the destroy() method one last time to free any memory when the object is unset

__destruct() : mixed
see Image::destroy()
since

2.5.0

Response

mixed

createThumbs

Method to create thumbnails from the current image and save them to disk. It allows creation by resizing or cropping the original image.

createThumbs(mixed thumbSizes, int creationMethod = self::SCALE_INSIDE, string thumbsFolder = null) : array
since

2.5.0
throws

\LogicException

\InvalidArgumentException

Arguments

thumbSizes

mixedstring or array of strings. Example: $thumbSizes = array('150x75','250x150');

creationMethod

int1-3 resize $scaleMethod | 4 create cropping

thumbsFolder

stringdestination thumbs folder. null generates a thumbs folder in the image folder

Response

array

crop

Method to crop the current image.

crop(mixed width, mixed height, int left = null, int top = null, bool createNew = true) : \Joomla\CMS\Image\Image
since

2.5.0
throws

\LogicException

Arguments

width

mixedThe width of the image section to crop in pixels or a percentage.

height

mixedThe height of the image section to crop in pixels or a percentage.

left

intThe number of pixels from the left to start cropping.

top

intThe number of pixels from the top to start cropping.

createNew

boolIf true the current image will be cloned, cropped and returned; else the current image will be cropped and returned.

Response

\Joomla\CMS\Image\Image

cropResize

Method to crop an image after resizing it to maintain proportions without having to do all the set up work.

cropResize(int width, int height, bool createNew = true) : \Joomla\CMS\Image\Image
since

2.5.0

Arguments

width

intThe desired width of the image in pixels or a percentage.

height

intThe desired height of the image in pixels or a percentage.

createNew

boolIf true the current image will be cloned, resized, cropped and returned.

Response

\Joomla\CMS\Image\Image

destroy

Method to destroy an image handle and free the memory associated with the handle

destroy() : bool
since

2.5.0

Response

boolTrue on success, false on failure or if no image is loaded

filter

Method to apply a filter to the image by type. Two examples are: grayscale and sketchy.

filter(string type, array options = []) : \Joomla\CMS\Image\Image
since

2.5.0
see \Joomla\CMS\Image\Filter
throws

\LogicException

Arguments

type

stringThe name of the image filter to apply.

options

arrayAn array of options for the filter.

Response

\Joomla\CMS\Image\Image

flip

Method to flip the current image.

flip(int mode, bool createNew = true) : \Joomla\CMS\Image\Image
since

3.4.2
throws

\LogicException

Arguments

mode

intThe flip mode for flipping the image {@link}

createNew

boolIf true the current image will be cloned, flipped and returned; else the current image will be flipped and returned.

Response

\Joomla\CMS\Image\Image

generateThumbs

Method to generate thumbnails from the current image. It allows creation by resizing or cropping the original image.

generateThumbs(mixed thumbSizes, int creationMethod = self::SCALE_INSIDE) : array
since

2.5.0
throws

\LogicException

\InvalidArgumentException

Arguments

thumbSizes

mixedString or array of strings. Example: $thumbSizes = array('150x75','250x150');

creationMethod

int1-3 resize $scaleMethod | 4 create cropping | 5 resize then crop

Response

array

getFilterInstance

Method to get an image filter instance of a specified type.

getFilterInstance(string type) : \Joomla\CMS\Image\ImageFilter
since

2.5.0
throws

\RuntimeException

Arguments

type

stringThe image filter type to get.

Response

\Joomla\CMS\Image\ImageFilter

getHandle

Get the image resource handle

getHandle() : resource
since

3.8.0
throws

\LogicExceptionif an image has not been loaded into the instance

Response

resource

getHeight

Method to get the height of the image in pixels.

getHeight() : int
since

2.5.0
throws

\LogicException

Response

int

getImageFileProperties

Method to return a properties object for an image given a filesystem path.

getImageFileProperties(string path) : \stdClass
static

The result object has values for image width, height, type, attributes, mime type, bits, and channels.

since

2.5.0
throws

\InvalidArgumentException

\RuntimeException

Arguments

path

stringThe filesystem path to the image for which to get properties.

Response

\stdClass

getOrientation

Method to detect whether an image's orientation is landscape, portrait or square.

getOrientation() : mixed

The orientation will be returned as a string.

since

3.4.2

Response

mixedOrientation string or null.

getOrientationString

Compare width and height integers to determine image orientation.

getOrientationString(int width, int height) : string
static
since

3.4.2

Arguments

width

intThe width value to use for calculation

height

intThe height value to use for calculation

Response

stringOrientation string

getPath

Method to return the path

getPath() : string
since

2.5.0

Response

string

getWidth

Method to get the width of the image in pixels.

getWidth() : int
since

2.5.0
throws

\LogicException

Response

int

isLoaded

Method to determine whether or not an image has been loaded into the object.

isLoaded() : bool
since

2.5.0

Response

bool

isTransparent

Method to determine whether or not the image has transparency.

isTransparent() : bool
since

2.5.0
throws

\LogicException

Response

bool

loadFile

Method to load a file into the Image object as the resource.

loadFile(string path) : void
since

2.5.0
throws

\InvalidArgumentException

\RuntimeException

Arguments

path

stringThe filesystem path to load as an image.

prepareDimensions

Method to get the new dimensions for a resized image.

prepareDimensions(int width, int height, int scaleMethod) : \stdClass
since

2.5.0
throws

\InvalidArgumentExceptionIf width, height or both given as zero

Arguments

width

intThe width of the resized image in pixels.

height

intThe height of the resized image in pixels.

scaleMethod

intThe method to use for scaling

Response

\stdClass

resize

Method to resize the current image.

resize(mixed width, mixed height, bool createNew = true, int scaleMethod = self::SCALE_INSIDE) : \Joomla\CMS\Image\Image
since

2.5.0
throws

\LogicException

Arguments

width

mixedThe width of the resized image in pixels or a percentage.

height

mixedThe height of the resized image in pixels or a percentage.

createNew

boolIf true the current image will be cloned, resized and returned; else the current image will be resized and returned.

scaleMethod

intWhich method to use for scaling

Response

\Joomla\CMS\Image\Image

rotate

Method to rotate the current image.

rotate(mixed angle, int background = -1, bool createNew = true) : \Joomla\CMS\Image\Image
since

2.5.0
throws

\LogicException

Arguments

angle

mixedThe angle of rotation for the image

background

intThe background color to use when areas are added due to rotation

createNew

boolIf true the current image will be cloned, rotated and returned; else the current image will be rotated and returned.

Response

\Joomla\CMS\Image\Image

sanitizeHeight

Method to sanitize a height value.

sanitizeHeight(mixed height, mixed width) : int
since

2.5.0

Arguments

height

mixedThe input height value to sanitize.

width

mixedThe input width value for reference.

Response

int

sanitizeOffset

Method to sanitize an offset value like left or top.

sanitizeOffset(mixed offset) : int
since

2.5.0

Arguments

offset

mixedAn offset value.

Response

int

sanitizeWidth

Method to sanitize a width value.

sanitizeWidth(mixed width, mixed height) : int
since

2.5.0

Arguments

width

mixedThe input width value to sanitize.

height

mixedThe input height value for reference.

Response

int

setThumbnailGenerate

Method for set option of generate thumbnail method

setThumbnailGenerate(bool quality = true) : void
since

3.7.0

Arguments

quality

boolTrue for best quality. False for best speed.

toFile

Method to write the current image out to a file or output directly.

toFile(mixed path, int type = IMAGETYPE_JPEG, array options = []) : bool
link
since

2.5.0
throws

\LogicException

Arguments

path

mixedThe filesystem path to save the image. When null, the raw image stream will be outputted directly.

type

intThe image type to save the file as.

options

arrayThe image type options to use in saving the file. For PNG and JPEG formats use quality key to set compression level (0..9 and 0..100)

Response

bool

watermark

Watermark the image

watermark(\Joomla\CMS\Image\Image watermark, int transparency = 50, int bottomMargin, int rightMargin) : \Joomla\CMS\Image\Image
since

3.8.0
link

Arguments

watermark

\Joomla\CMS\Image\ImageThe Image object containing the watermark graphic

transparency

intThe transparency to use for the watermark graphic

bottomMargin

intThe margin from the bottom of this image

rightMargin

intThe margin from the right side of this image

Response

\Joomla\CMS\Image\Image

Constants

SCALE_FILL

Value 1
const

integer
since

2.5.0

SCALE_INSIDE

Value 2
const

integer
since

2.5.0

SCALE_OUTSIDE

Value 3
const

integer
since

2.5.0

CROP

Value 4
const

integer
since

2.5.0

CROP_RESIZE

Value 5
const

integer
since

2.5.0

SCALE_FIT

Value 6
const

integer
since

2.5.0

ORIENTATION_LANDSCAPE

Value 'landscape'
const

string
since

3.4.2

ORIENTATION_PORTRAIT

Value 'portrait'
const

string
since

3.4.2

ORIENTATION_SQUARE

Value 'square'
const

string
since

3.4.2

Properties

handle

The image resource handle.

since

2.5.0

Type(s)

resource

path

The source image path.

since

2.5.0

Type(s)

string

formats

Whether or not different image formats are supported.

static
since

2.5.0

Type(s)

array

generateBestQuality

Flag if an image should use the best quality available. Disable for improved performance.

since

3.7.0

Type(s)

bool
  • \ Joomla
  • \ CMS
  • \ Image
  • \ Image