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package de.bixilon.kotlinglm
import de.bixilon.kotlinglm.vec2.Vec2
import de.bixilon.kotlinglm.vec4.Vec4
import unsigned.toUInt
interface func_Packing {
fun packUnorm2x16(v: Vec2): Int {
val x = GLM.round(GLM.clamp(v.x, 0f, 1f) * 65535f).s
val y = GLM.round(GLM.clamp(v.y, 0f, 1f) * 65535f).s
val a = x.toUInt() shl 16
val b = y.toUInt()
return a or b
}
fun unpackUnorm2x16(p: Int, res: Vec2 = Vec2()): Vec2 {
val x = (p ushr 16).s
val y = (p and 0xffff).s
res.x = x.toUInt().f * 1.5259021896696421759365224689097e-5f
res.y = y.toUInt().f * 1.5259021896696421759365224689097e-5f
return res
}
fun packSnorm2x16(v: Vec2): Int {
val x = GLM.round(GLM.clamp(v.x, -1f, 1f) * 32767f).s
val y = GLM.round(GLM.clamp(v.y, -1f, 1f) * 32767f).s
val a = x.i shl 16
val b = (y.i and 0xffff)
return a or b
}
fun unpackSnorm2x16(p: Int, res: Vec2 = Vec2()): Vec2 {
val x = (p shr 16).s
val y = (p and 0xffff).s
res.x = GLM.clamp(x.f * 3.0518509475997192297128208258309e-5f, -1f, 1f)
res.y = GLM.clamp(y.f * 3.0518509475997192297128208258309e-5f, -1f, 1f)
return res
}
fun packUnorm4x8(v: Vec4): Int {
val x = GLM.round(GLM.clamp(v.x, 0f, 1f) * 255f).b
val y = GLM.round(GLM.clamp(v.y, 0f, 1f) * 255f).b
val z = GLM.round(GLM.clamp(v.z, 0f, 1f) * 255f).b
val w = GLM.round(GLM.clamp(v.w, 0f, 1f) * 255f).b
val a = x.toUInt() shl 24
val b = (y.toUInt() and 0xff) shl 16
val c = (z.toUInt() and 0xff) shl 8
val d = w.toUInt() and 0xff
return a or b or c or d
}
fun unpackUnorm4x8(p: Int, res: Vec4 = Vec4()): Vec4 {
val x = (p ushr 24).b
val y = ((p ushr 16) and 0xff).b
val z = ((p ushr 8) and 0xff).b
val w = (p and 0xff).b
res.x = x.toUInt().f * 0.0039215686274509803921568627451f
res.y = y.toUInt().f * 0.0039215686274509803921568627451f
res.z = z.toUInt().f * 0.0039215686274509803921568627451f
res.w = w.toUInt().f * 0.0039215686274509803921568627451f
return res
}
fun packSnorm4x8(v: Vec4): Int {
val x = GLM.round(GLM.clamp(v.x, -1f, 1f) * 127f).b
val y = GLM.round(GLM.clamp(v.y, -1f, 1f) * 127f).b
val z = GLM.round(GLM.clamp(v.z, -1f, 1f) * 127f).b
val w = GLM.round(GLM.clamp(v.w, -1f, 1f) * 127f).b
val a = x.i shl 24
val b = (y.i and 0xff) shl 16
val c = (z.i and 0xff) shl 8
val d = w.i and 0xff
return a or b or c or d
}
fun unpackSnorm4x8(p: Int, res: Vec4 = Vec4()): Vec4 {
val x = (p shr 24).b
val y = ((p shr 16) and 0xff).b
val z = ((p shr 8) and 0xff).b
val w = (p and 0xff).b
res.x = GLM.clamp(x.f * 0.0078740157480315f, -1f, 1f)
res.y = GLM.clamp(y.f * 0.0078740157480315f, -1f, 1f)
res.z = GLM.clamp(z.f * 0.0078740157480315f, -1f, 1f)
res.w = GLM.clamp(w.f * 0.0078740157480315f, -1f, 1f)
return res
}
}
