skikoMain.androidx.compose.ui.graphics.SkiaGraphicsContext.skiko.kt Maven / Gradle / Ivy

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/*
 * Copyright 2024 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 androidx.compose.runtime.snapshots.SnapshotStateObserver
import androidx.compose.ui.InternalComposeUiApi
import androidx.compose.ui.graphics.layer.GraphicsLayer

@InternalComposeUiApi
class SkiaGraphicsContext() : GraphicsContext {
    private val snapshotObserver = SnapshotStateObserver { command ->
        command()
    }

    // Temporary workaround to disable state tracking workaround inside old internal layers
    var activeGraphicsLayersCount = 0
        private set

    init {
        snapshotObserver.start()
    }

    fun dispose() {
        snapshotObserver.stop()
        snapshotObserver.clear()
    }

    override fun createGraphicsLayer(): GraphicsLayer {
        activeGraphicsLayersCount++
        return GraphicsLayer(snapshotObserver)
    }

    override fun releaseGraphicsLayer(layer: GraphicsLayer) {
        if (!layer.isReleased) {
            activeGraphicsLayersCount--
            layer.release()
        }
    }
}