jdk.awt.image.renderable.RenderableImage — clojure-interop/java.awt 1.0.5

A RenderableImage is a common interface for rendering-independent images (a notion which subsumes resolution independence). That is, images which are described and have operations applied to them independent of any specific rendering of the image. For example, a RenderableImage can be rotated and cropped in resolution-independent terms. Then, it can be rendered for various specific contexts, such as a draft preview, a high-quality screen display, or a printer, each in an optimal fashion.

A RenderedImage is returned from a RenderableImage via the createRendering() method, which takes a RenderContext. The RenderContext specifies how the RenderedImage should be constructed. Note that it is not possible to extract pixels directly from a RenderableImage.

The createDefaultRendering() and createScaledRendering() methods are convenience methods that construct an appropriate RenderContext internally. All of the rendering methods may return a reference to a previously produced rendering.

create-default-rendering clj

(create-default-rendering this)

Returnd a RenderedImage instance of this image with a default width and height in pixels. The RenderContext is built automatically with an appropriate usr2dev transform and an area of interest of the full image. The rendering hints are empty. createDefaultRendering may make use of a stored rendering for speed.

returns: a RenderedImage containing the rendered data. - java.awt.image.RenderedImage

create-rendering clj

(create-rendering this render-context)

Creates a RenderedImage that represented a rendering of this image using a given RenderContext. This is the most general way to obtain a rendering of a RenderableImage.

The created RenderedImage may have a property identified by the String HINTS_OBSERVED to indicate which RenderingHints (from the RenderContext) were used to create the image. In addition any RenderedImages that are obtained via the getSources() method on the created RenderedImage may have such a property.

render-context - the RenderContext to use to produce the rendering. - java.awt.image.renderable.RenderContext

returns: a RenderedImage containing the rendered data. - java.awt.image.RenderedImage

create-scaled-rendering clj

(create-scaled-rendering this w h hints)

Creates a RenderedImage instance of this image with width w, and height h in pixels. The RenderContext is built automatically with an appropriate usr2dev transform and an area of interest of the full image. All the rendering hints come from hints passed in.

If w == 0, it will be taken to equal Math.round(h*(getWidth()/getHeight())). Similarly, if h == 0, it will be taken to equal Math.round(w*(getHeight()/getWidth())). One of w or h must be non-zero or else an IllegalArgumentException will be thrown.

The created RenderedImage may have a property identified by the String HINTS_OBSERVED to indicate which RenderingHints were used to create the image. In addition any RenderedImages that are obtained via the getSources() method on the created RenderedImage may have such a property.

w - the width of rendered image in pixels, or 0. - int h - the height of rendered image in pixels, or 0. - int hints - a RenderingHints object containing hints. - java.awt.RenderingHints

returns: a RenderedImage containing the rendered data. - java.awt.image.RenderedImage

dynamic? clj

(dynamic? this)

Returns true if successive renderings (that is, calls to createRendering() or createScaledRendering()) with the same arguments may produce different results. This method may be used to determine whether an existing rendering may be cached and reused. It is always safe to return true.

returns: true if successive renderings with the same arguments might produce different results; false otherwise. - boolean

get-height clj

(get-height this)

Gets the height in user coordinate space. By convention, the usual height of a RenderedImage is equal to 1.0F.

returns: the height of the image in user coordinates. - float

get-min-x clj

(get-min-x this)

Gets the minimum X coordinate of the rendering-independent image data.

returns: the minimum X coordinate of the rendering-independent image data. - float

get-min-y clj

(get-min-y this)

Gets the minimum Y coordinate of the rendering-independent image data.

returns: the minimum Y coordinate of the rendering-independent image data. - float

get-property clj

(get-property this name)

Gets a property from the property set of this image. If the property name is not recognized, java.awt.Image.UndefinedProperty will be returned.

name - the name of the property to get, as a String. - java.lang.String

returns: a reference to the property Object, or the value java.awt.Image.UndefinedProperty. - java.lang.Object

get-property-names clj

(get-property-names this)

Returns a list of names recognized by getProperty.

returns: a list of property names. - java.lang.String[]

get-sources clj

(get-sources this)

Returns a vector of RenderableImages that are the sources of image data for this RenderableImage. Note that this method may return an empty vector, to indicate that the image has no sources, or null, to indicate that no information is available.

returns: a (possibly empty) Vector of RenderableImages, or null. - java.util.Vector<java.awt.image.renderable.RenderableImage>

get-width clj

(get-width this)

Gets the width in user coordinate space. By convention, the usual width of a RenderableImage is equal to the image's aspect ratio (width divided by height).

returns: the width of the image in user coordinates. - float