49 lines
1.5 KiB
Kotlin
49 lines
1.5 KiB
Kotlin
/*
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* Copyright (C) 2021 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.example.testapp
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import android.renderscript.toolkit.LookupTable
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import android.renderscript.toolkit.Range2d
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/**
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* Reference implementation of a LookUpTable operation.
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*/
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@ExperimentalUnsignedTypes
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fun referenceLut(
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inputArray: ByteArray,
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sizeX: Int,
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sizeY: Int,
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table: LookupTable,
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restriction: Range2d?
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): ByteArray {
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val input = Vector2dArray(inputArray.asUByteArray(), 4, sizeX, sizeY)
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val output = input.createSameSized()
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input.forEach(restriction) { x, y ->
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val oldValue = input[x, y]
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val newValue = byteArrayOf(
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table.red[oldValue[0].toInt()],
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table.green[oldValue[1].toInt()],
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table.blue[oldValue[2].toInt()],
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table.alpha[oldValue[3].toInt()]
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)
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output[x, y] = newValue.asUByteArray()
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}
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return output.values.asByteArray()
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}
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