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Feature/text core
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| <manifest package="com.omega_r.libs.entities" /> |
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core/src/androidMain/kotlin/com/omega_r/libs/entities/decoders/BitmapDecoders.kt
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| package com.omega_r.libs.entities.decoders | ||
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| import android.annotation.TargetApi | ||
| import android.graphics.Bitmap | ||
| import android.graphics.BitmapFactory | ||
| import android.os.Build | ||
| import java.io.File | ||
| import java.io.InputStream | ||
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| typealias BitmapOptions = BitmapFactory.Options | ||
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| interface BitmapDecoders { | ||
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| companion object { | ||
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| val default = Default() | ||
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| var current: BitmapDecoders = default | ||
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| } | ||
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| fun decodeBitmap(source: File, requiredWidth: Int? = null, requiredHeight: Int? = null): Bitmap? | ||
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| fun decodeBitmap(source: InputStream, requiredWidth: Int? = null, requiredHeight: Int? = null): Bitmap? | ||
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| fun decodeBitmap(source: ByteArray, requiredWidth: Int? = null, requiredHeight: Int? = null): Bitmap? | ||
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| fun recycle(bitmap: Bitmap) | ||
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| fun clearMemory() | ||
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| fun trimMemory(level: Int) | ||
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| fun calculateInSampleSize(options: BitmapFactory.Options, reqWidth: Int, reqHeight: Int): Int { | ||
| // Raw height and width of image | ||
| val height = options.outHeight | ||
| val width = options.outWidth | ||
| var inSampleSize = 1 | ||
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| if (height > reqHeight || width > reqWidth) { | ||
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| val halfHeight = height / 2 | ||
| val halfWidth = width / 2 | ||
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| // Calculate the largest inSampleSize value that is a power of 2 and keeps both | ||
| // height and width larger than the requested height and width. | ||
| while (halfHeight / inSampleSize > reqHeight && halfWidth / inSampleSize > reqWidth) { | ||
| inSampleSize *= 2 | ||
| } | ||
| } | ||
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| return inSampleSize | ||
| } | ||
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| @TargetApi(Build.VERSION_CODES.KITKAT) | ||
| private fun getBitmapByteSize(bitmap: Bitmap): Int { | ||
| // The return value of getAllocationByteCount silently changes for recycled bitmaps from the | ||
| // internal buffer size to row bytes * height. To avoid random inconsistencies in caches, we | ||
| // instead assert here. | ||
| check(!bitmap.isRecycled) { | ||
| ("Cannot obtain size for recycled Bitmap: " + bitmap | ||
| + "[" + bitmap.width + "x" + bitmap.height + "] " + bitmap.config) | ||
| } | ||
| if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) { | ||
| // Workaround for KitKat initial release NPE in Bitmap, fixed in MR1. See issue #148. | ||
| try { | ||
| return bitmap.allocationByteCount | ||
| } catch (e: NullPointerException) { | ||
| // Do nothing. | ||
| } | ||
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| } | ||
| return bitmap.height * bitmap.rowBytes | ||
| } | ||
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| fun getBitmapByteSize(width: Int, height: Int, config: Bitmap.Config): Int { | ||
| return width * height * getBytesPerPixel(config) | ||
| } | ||
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| fun getBytesPerPixel(config: Bitmap.Config?): Int { | ||
| return when (config) { | ||
| Bitmap.Config.ALPHA_8 -> 1 | ||
| Bitmap.Config.RGB_565, Bitmap.Config.ARGB_4444 -> 2 | ||
| Bitmap.Config.ARGB_8888 -> 4 | ||
| else -> 4 | ||
| } | ||
| } | ||
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| class Default : BitmapDecoders { | ||
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| override fun decodeBitmap(source: File, requiredWidth: Int?, requiredHeight: Int?): Bitmap? { | ||
| return decodeBitmap(requiredWidth, requiredHeight) { | ||
| BitmapFactory.decodeFile(source.absolutePath, it) | ||
| } | ||
| } | ||
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| override fun decodeBitmap(source: InputStream, requiredWidth: Int?, requiredHeight: Int?): Bitmap? { | ||
| return decodeBitmap(requiredWidth, requiredHeight) { | ||
| BitmapFactory.decodeStream(source, null, it) | ||
| } | ||
| } | ||
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| override fun decodeBitmap(source: ByteArray, requiredWidth: Int?, requiredHeight: Int?): Bitmap? { | ||
| return decodeBitmap(requiredWidth, requiredHeight) { | ||
| BitmapFactory.decodeByteArray(source, 0, source.size, it) | ||
| } | ||
| } | ||
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| private inline fun decodeBitmap(reqWidth: Int?, reqHeight: Int?, bitmapFactory: (BitmapFactory.Options?) -> Bitmap?): Bitmap? { | ||
| val options = if (reqWidth != null && reqHeight != null) { | ||
| BitmapOptions().apply { | ||
| inJustDecodeBounds = true | ||
| bitmapFactory(this) | ||
| inJustDecodeBounds = false | ||
| inSampleSize = calculateInSampleSize(this, reqWidth, reqHeight) | ||
| } | ||
| } else null | ||
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| return bitmapFactory(options) | ||
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| } | ||
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| override fun recycle(bitmap: Bitmap) { | ||
| bitmap.recycle() | ||
| } | ||
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| override fun clearMemory() { | ||
| // nothing | ||
| } | ||
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| override fun trimMemory(level: Int) { | ||
| // nothing | ||
| } | ||
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| } | ||
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| } | ||
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| @JvmOverloads | ||
| fun File.toBitmap( | ||
| requiredWidth: Int? = null, | ||
| requiredHeight: Int? = null, | ||
| decoders: BitmapDecoders = BitmapDecoders.current | ||
| ): Bitmap? { | ||
| return decoders.decodeBitmap(this, requiredWidth, requiredHeight) | ||
| } | ||
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| @JvmOverloads | ||
| fun InputStream.toBitmap( | ||
| requiredWidth: Int? = null, | ||
| requiredHeight: Int? = null, | ||
| decoders: BitmapDecoders = BitmapDecoders.current | ||
| ): Bitmap? { | ||
| return decoders.decodeBitmap(this, requiredWidth, requiredHeight) | ||
| } | ||
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| @JvmOverloads | ||
| fun ByteArray.toBitmap( | ||
| requiredWidth: Int? = null, | ||
| requiredHeight: Int? = null, | ||
| decoders: BitmapDecoders = BitmapDecoders.current | ||
| ): Bitmap? { | ||
| return decoders.decodeBitmap(this, requiredWidth, requiredHeight) | ||
| } |
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