/*
 * Copyright (C) 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 com.android.eyedropper.ui.utils

import android.graphics.Bitmap
import androidx.annotation.DrawableRes
import androidx.appcompat.content.res.AppCompatResources
import androidx.compose.runtime.Composable
import androidx.compose.runtime.remember
import androidx.compose.ui.graphics.ImageBitmap
import androidx.compose.ui.graphics.asImageBitmap
import androidx.compose.ui.platform.LocalContext

/**
 * Utility object to convert Android Drawable resources as Compose [ImageBitmap]s.
 */
object ComposableDrawableLoader {
    /**
     * Converts and caches a Drawable Resource into an ImageBitmap suitable to be drawn in a Canvas.
     *
     * Must be called within a Composable context.
     */
    @Composable
    fun drawableToBitmap(@DrawableRes drawableId: Int): ImageBitmap {
        val context = LocalContext.current
        return remember(drawableId) {
            val drawable = AppCompatResources.getDrawable(context, drawableId)!!
            val width = drawable.intrinsicWidth
            val height = drawable.intrinsicHeight
            val bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888)
            val canvas = android.graphics.Canvas(bitmap)
            drawable.setBounds(0, 0, width, height)
            drawable.draw(canvas)
            bitmap.asImageBitmap()
        }
    }
}