1 /* 2 * Copyright (C) 2023 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package android.tools.common.datatypes 18 19 import android.tools.common.FloatFormatter 20 import android.tools.common.withCache 21 import kotlin.js.JsExport 22 import kotlin.js.JsName 23 24 /** 25 * Representation of a matrix 3x3 used for layer transforms 26 * 27 * ``` 28 * |dsdx dsdy tx| 29 * matrix = |dtdx dtdy ty| 30 * |0 0 1 | 31 * ``` 32 */ 33 @JsExport 34 class Matrix33 35 private constructor( 36 @JsName("dsdx") val dsdx: Float, 37 @JsName("dtdx") val dtdx: Float, 38 @JsName("tx") val tx: Float = 0F, 39 @JsName("dsdy") val dsdy: Float, 40 @JsName("dtdy") val dtdy: Float, 41 @JsName("ty") val ty: Float = 0F 42 ) : DataType() { 43 override val isEmpty = 44 dsdx == 0f && dtdx == 0f && tx == 0f && dsdy == 0f && dtdy == 0f && ty == 0f 45 doPrintValuenull46 override fun doPrintValue() = buildString { 47 append("dsdx:${FloatFormatter.format(dsdx)} ") 48 append("dtdx:${FloatFormatter.format(dtdx)} ") 49 append("dsdy:${FloatFormatter.format(dsdy)} ") 50 append("dtdy:${FloatFormatter.format(dtdy)} ") 51 append("tx:${FloatFormatter.format(tx)} ") 52 append("ty:${FloatFormatter.format(ty)}") 53 } 54 55 companion object { 56 val EMPTY: Matrix33 <lambda>null57 get() = withCache { from(dsdx = 0f, dtdx = 0f, tx = 0f, dsdy = 0f, dtdy = 0f, ty = 0f) } 58 59 @JsName("identity") <lambda>null60 fun identity(x: Float, y: Float): Matrix33 = withCache { 61 from(dsdx = 1f, dtdx = 0f, x, dsdy = 0f, dtdy = 1f, y) 62 } 63 64 @JsName("rot270") <lambda>null65 fun rot270(x: Float, y: Float): Matrix33 = withCache { 66 from(dsdx = 0f, dtdx = -1f, x, dsdy = 1f, dtdy = 0f, y) 67 } 68 69 @JsName("rot180") <lambda>null70 fun rot180(x: Float, y: Float): Matrix33 = withCache { 71 from(dsdx = -1f, dtdx = 0f, x, dsdy = 0f, dtdy = -1f, y) 72 } 73 74 @JsName("rot90") <lambda>null75 fun rot90(x: Float, y: Float): Matrix33 = withCache { 76 from(dsdx = 0f, dtdx = 1f, x, dsdy = -1f, dtdy = 0f, y) 77 } 78 79 @JsName("from") fromnull80 fun from( 81 dsdx: Float, 82 dtdx: Float, 83 tx: Float, 84 dsdy: Float, 85 dtdy: Float, 86 ty: Float 87 ): Matrix33 = withCache { Matrix33(dsdx, dtdx, tx, dsdy, dtdy, ty) } 88 } 89 } 90