| /* |
| * Copyright 2019 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package androidx.ui.text.style |
| |
| import androidx.compose.Immutable |
| import androidx.compose.Stable |
| import androidx.ui.util.lerp |
| |
| /** |
| * Define a geometric transformation on text. |
| * |
| * @param scaleX The scale of the text on the horizontal direction. The default value is 1.0f, i.e |
| * no scaling. |
| * @param skewX The shear of the text on the horizontal direction. A pixel at (x, y), where y is |
| * the distance above baseline, will be transformed to (x + y * skewX, y). The default value is |
| * 0.0f i.e. no skewing. |
| */ |
| @Immutable |
| data class TextGeometricTransform( |
| val scaleX: Float = 1.0f, |
| val skewX: Float = 0f |
| ) { |
| companion object { |
| @Stable |
| internal val None = TextGeometricTransform(1.0f, 0.0f) |
| } |
| } |
| |
| fun lerp( |
| start: TextGeometricTransform, |
| stop: TextGeometricTransform, |
| fraction: Float |
| ): TextGeometricTransform { |
| return TextGeometricTransform( |
| lerp(start.scaleX, stop.scaleX, fraction), |
| lerp(start.skewX, stop.skewX, fraction) |
| ) |
| } |