/
images.kt
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/
images.kt
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/*
* Copyright 2022 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
*
* https://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.google.android.horologist.tiles.images
import android.content.Context
import android.graphics.Bitmap
import android.graphics.drawable.BitmapDrawable
import androidx.wear.tiles.ResourceBuilders
import androidx.wear.tiles.ResourceBuilders.ImageResource
import coil.ImageLoader
import coil.request.ImageRequest
import java.nio.ByteBuffer
/**
* Load a Bitmap from a CoilImage loader.
*
* @param context the context of the service or activity.
* @param data the image to fetch in one of the support Coil formats such as String, HttpUrl.
* @param configurer any additional configuration of the ImageRequest being built.
*/
public suspend fun ImageLoader.loadImage(
context: Context,
data: Any?,
configurer: ImageRequest.Builder.() -> Unit = {}
): Bitmap? {
val request = ImageRequest.Builder(context)
.data(data)
.apply(configurer)
.allowRgb565(true)
.allowHardware(false)
.build()
val response = execute(request)
return (response.drawable as? BitmapDrawable)?.bitmap
}
/**
* Load an ImageResource from a CoilImage loader.
*
* @param context the context of the service or activity.
* @param data the image to fetch in one of the support Coil formats such as String, HttpUrl.
* @param configurer any additional configuration of the ImageRequest being built.
*/
public suspend fun ImageLoader.loadImageResource(
context: Context,
data: Any?,
configurer: ImageRequest.Builder.() -> Unit = {}
): ImageResource? = loadImage(context, data, configurer)?.toImageResource()
/**
* Convert a bitmap to a ImageResource.
*
* Ensures it uses RGB_565 encoding, then generates an ImageResource
* with the correct width and height.
*/
public fun Bitmap.toImageResource(): ImageResource {
val rgb565Bitmap = if (config == Bitmap.Config.RGB_565) {
this
} else {
copy(Bitmap.Config.RGB_565, false)
}
val byteBuffer = ByteBuffer.allocate(rgb565Bitmap.byteCount)
rgb565Bitmap.copyPixelsToBuffer(byteBuffer)
val bytes: ByteArray = byteBuffer.array()
return ImageResource.Builder().setInlineResource(
ResourceBuilders.InlineImageResource.Builder()
.setData(bytes)
.setWidthPx(rgb565Bitmap.width)
.setHeightPx(rgb565Bitmap.height)
.setFormat(ResourceBuilders.IMAGE_FORMAT_RGB_565)
.build()
)
.build()
}