/*
 * ImageToolbox is an image editor for android
 * Copyright (c) 2026 T8RIN (Malik Mukhametzyanov)
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 *
 * 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.
 *
 * You should have received a copy of the Apache License
 * along with this program.  If not, see <http://www.apache.org/licenses/LICENSE-2.0>.
 */

package io.github.alexzhirkevich.qrose

import androidx.compose.ui.geometry.Size
import androidx.compose.ui.graphics.Canvas
import androidx.compose.ui.graphics.ColorFilter
import androidx.compose.ui.graphics.ImageBitmap
import androidx.compose.ui.graphics.drawscope.CanvasDrawScope
import androidx.compose.ui.graphics.painter.Painter
import androidx.compose.ui.unit.Density
import androidx.compose.ui.unit.LayoutDirection

/**
 * Converts [Painter] to [ImageBitmap] with desired [width], [height], [alpha] and [colorFilter]
 * */
fun Painter.toImageBitmap(
    width: Int,
    height: Int,
    alpha: Float = 1f,
    colorFilter: ColorFilter? = null
): ImageBitmap {

    val bmp = ImageBitmap(width, height)
    val canvas = Canvas(bmp)

    CanvasDrawScope().draw(
        density = Density(1f, 1f),
        layoutDirection = LayoutDirection.Ltr,
        canvas = canvas,
        size = Size(width.toFloat(), height.toFloat())
    ) {
        draw(this@draw.size, alpha, colorFilter)
    }

    return bmp
}