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commonMain.org.jetbrains.skia.EncodedOrigin.kt Maven / Gradle / Ivy
package org.jetbrains.skia
enum class EncodedOrigin {
/**
* Do not use
*/
UNUSED,
/**
* Default
*/
TOP_LEFT,
/**
* Reflected across y-axis
*/
TOP_RIGHT,
/**
* Rotated 180
*/
BOTTOM_RIGHT,
/**
* Reflected across x-axis
*/
BOTTOM_LEFT,
/**
* Reflected across x-axis, Rotated 90 CCW
*/
LEFT_TOP,
/**
* Rotated 90 CW
*/
RIGHT_TOP,
/**
* Reflected across x-axis, Rotated 90 CW
*/
RIGHT_BOTTOM,
/**
* Rotated 90 CCW
*/
LEFT_BOTTOM;
/**
* Given an encoded origin and the width and height of the source data, returns a matrix
* that transforms the source rectangle with upper left corner at [0, 0] and origin to a correctly
* oriented destination rectangle of [0, 0, w, h].
*/
fun toMatrix(w: Int, h: Int): Matrix33 {
return when (this) {
TOP_LEFT -> Matrix33.Companion.IDENTITY
TOP_RIGHT -> Matrix33(-1f, 0f, w.toFloat(), 0f, 1f, 0f, 0f, 0f, 1f)
BOTTOM_RIGHT -> Matrix33(-1f, 0f, w.toFloat(), 0f, -1f, h.toFloat(), 0f, 0f, 1f)
BOTTOM_LEFT -> Matrix33(1f, 0f, 0f, 0f, -1f, h.toFloat(), 0f, 0f, 1f)
LEFT_TOP -> Matrix33(0f, 1f, 0f, 1f, 0f, 0f, 0f, 0f, 1f)
RIGHT_TOP -> Matrix33(0f, -1f, w.toFloat(), 1f, 0f, 0f, 0f, 0f, 1f)
RIGHT_BOTTOM -> Matrix33(0f, -1f, w.toFloat(), -1f, 0f, h.toFloat(), 0f, 0f, 1f)
LEFT_BOTTOM -> Matrix33(0f, 1f, 0f, -1f, 0f, h.toFloat(), 0f, 0f, 1f)
else -> throw IllegalArgumentException("Unsupported origin $this")
}
}
/**
* Return true if the encoded origin includes a 90 degree rotation, in which case the width
* and height of the source data are swapped relative to a correctly oriented destination.
*/
fun swapsWidthHeight(): Boolean {
return when (this) {
LEFT_TOP, RIGHT_TOP, RIGHT_BOTTOM, LEFT_BOTTOM -> true
else -> false
}
}
}
