kitepdf-core/io.github.yuroyami.kitepdf.core.render/KiteImageSampling

KiteImageSampling

How a canvas samples an image that it draws. ISO 32000-1, 8.9.5.3 leaves image interpolation to the reader, so every canvas follows imageSampling and draws the same pixels (#122, #123).

Properties

shrinks

val shrinks: Boolean

True when the canvas must average the image down with shrinkRgba or shrinkArgb before drawing it.

shrinkX

val shrinkX: Int

Average this many source columns into one before drawing: a power of two, 1 to keep them.

shrinkY

val shrinkY: Int

Average this many source rows into one before drawing: a power of two, 1 to keep them.

smooth

val smooth: Boolean

Blend neighbouring pixels. Otherwise take the nearest pixel, so enlarged pixels keep hard edges.

Functions

rasterHeight

fun rasterHeight(height: Int): Int

The bitmap height after toSampledRgbaBytes also filters the remaining reduction.

rasterWidth

fun rasterWidth(width: Int): Int

The bitmap width after toSampledRgbaBytes also filters the remaining reduction.

shrunkHeight

fun shrunkHeight(height: Int): Int

The height of an image height pixels high after it is averaged down.

shrunkWidth

fun shrunkWidth(width: Int): Int

The width of an image width pixels wide after it is averaged down.