skikoExcludingWebMain.androidx.compose.ui.graphics.Actuals.skikoExcludingWeb.kt Maven / Gradle / Ivy
/*
* 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
*
* 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.compose.ui.graphics
import org.jetbrains.skia.Bitmap
import org.jetbrains.skia.ColorAlphaType
import org.jetbrains.skia.Image
import org.jetbrains.skia.ImageInfo
/*
We use this implementation for non-web targets only. It's faster than `Bitmap.fromImage`.
The difference becomes noticeable when running a loop of 100 calls.
On Desktop/JVM:
11 ms for the current (default) implementation vs ~50ms for Bitmap.fromImage.
The implementation for web uses `Bitmap.fromImage`, see Actuals.jsWasm.kt
*/
internal actual fun Image.toBitmap(): Bitmap {
val bitmap = Bitmap()
bitmap.allocPixels(ImageInfo.makeN32(width, height, ColorAlphaType.PREMUL))
val canvas = org.jetbrains.skia.Canvas(bitmap)
canvas.drawImage(this, 0f, 0f)
bitmap.setImmutable()
return bitmap
}