tools/android/webgpu/src/androidTest/java/androidx/webgpu/ExternalCacheStorage.kt

/*
 * Copyright 2025 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.webgpu

import android.content.Context
import android.graphics.Bitmap
import java.io.File
import java.io.FileOutputStream

/**
 * A [Storage] implementation that saves bitmaps to the external cache directory. This is used for
 * tests that do not run in a google3 environment, where [TestStorage] is not available.
 */
class ExternalCacheStorage(private val context: Context) : Storage {
  override fun writeImage(imageName: String, bitmap: Bitmap) {
    val outputDir = context.cacheDir ?: throw Exception("cacheDir is null")
    if (!outputDir.exists()) {
      outputDir.mkdirs()
    }

    val outputFile = File(outputDir, imageName)
    FileOutputStream(outputFile).use { stream ->
      bitmap.compress(Bitmap.CompressFormat.PNG, 100, stream)
    }
  }
}