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Color.kt
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Color.kt
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/*
* Copyright 2020 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
*
* https://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 com.example.owl.ui.theme
import androidx.compose.material.Colors
import androidx.compose.material.Surface
import androidx.compose.runtime.Composable
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.graphics.compositeOver
import androidx.compose.ui.unit.Dp
import kotlin.math.ln
val yellow200 = Color(0xffffeb46)
val yellow400 = Color(0xffffc000)
val yellow500 = Color(0xffffde03)
val yellowDarkPrimary = Color(0xff242316)
val blue200 = Color(0xff91a4fc)
val blue700 = Color(0xff0336ff)
val blue800 = Color(0xff0035c9)
val blueDarkPrimary = Color(0xff1c1d24)
val pink200 = Color(0xffff7597)
val pink500 = Color(0xffff0266)
val pink600 = Color(0xffd8004d)
val pinkDarkPrimary = Color(0xff24191c)
/**
* Return the fully opaque color that results from compositing [onSurface] atop [surface] with the
* given [alpha]. Useful for situations where semi-transparent colors are undesirable.
*/
@Composable
fun Colors.compositedOnSurface(alpha: Float): Color {
return onSurface.copy(alpha = alpha).compositeOver(surface)
}
/**
* Elevation overlay logic copied from [Surface] — STOPSHIP remove b/155181601
*/
fun Colors.elevatedSurface(elevation: Dp): Color {
if (isLight) return surface
val foreground = calculateForeground(elevation)
return foreground.compositeOver(surface)
}
private fun calculateForeground(elevation: Dp): Color {
val alpha = ((4.5f * ln(elevation.value + 1)) + 2f) / 100f
return Color.White.copy(alpha = alpha)
}