Diagrams.TwoD.Image

Importing external images into diagrams. Usage example: To create a diagram from an embedded image with width 1 and height set according to the aspect ratio, use image img # scaleUToX 1, where img is a value of type DImage n e, created with a function like loadImageEmb, loadImageExt, or raster.

Documentation

data DImage :: * -> * -> * where

An image primitive, the two ints are width followed by height. Will typically be created by loadImageEmb or loadImageExt which, will handle setting the width and height to the actual width and height of the image.

Constructors

DImage :: ImageData t -> Int -> Int -> Transformation V2 n -> DImage n t

Instances

Fractional n => Transformable (DImage n a)

Fractional n => HasOrigin (DImage n a)

Fractional n => Renderable (DImage n a) NullBackend

type V (DImage n a) = V2

type N (DImage n a) = n

data ImageData :: * -> * where

ImageData is either a JuicyPixels DynamicImage tagged as Embedded or a reference tagged as External. Additionally Native is provided for external libraries to hook into.

Constructors

ImageRaster :: DynamicImage -> ImageData Embedded

ImageRef :: FilePath -> ImageData External

ImageNative :: t -> ImageData (Native t)

data Embedded

data External

data Native t

image :: (TypeableFloat n, Typeable a, Renderable (DImage n a) b) => DImage n a -> QDiagram b V2 n Any

Make a DImage into a Diagram.

loadImageEmb :: Num n => FilePath -> IO (Either String (DImage n Embedded))

Use JuicyPixels to read an image in any format and wrap it in a DImage. The width and height of the image are set to their actual values.

loadImageExt :: Num n => FilePath -> IO (Either String (DImage n External))

Check that a file exists, and use JuicyPixels to figure out the right size, but save a reference to the image instead of the raster data

uncheckedImageRef :: Num n => FilePath -> Int -> Int -> DImage n External

Make an "unchecked" image reference; have to specify a width and height. Unless the aspect ratio of the external image is the w :: h, then the image will be distorted.

raster :: Num n => (Int -> Int -> AlphaColour Double) -> Int -> Int -> DImage n Embedded

Create an image "from scratch" by specifying the pixel data

rasterDia :: (TypeableFloat n, Renderable (DImage n Embedded) b) => (Int -> Int -> AlphaColour Double) -> Int -> Int -> QDiagram b V2 n Any

Crate a diagram from raw raster data.