---
title: "ImageBitmapConfig"
description: "Possible ImageBitmap configurations. An ImageBitmap configuration describes how pixels are
stored. This affects the quality (color depth) as well as the ability to display
transparent/translucent colors."
type: "class"
---

<div class='type'>Class</div>


<a id='references'></a>

<div class='sourceset sourceset-common'>Common</div>


```kotlin
value class ImageBitmapConfig internal constructor(val value: Int)
```


Possible ImageBitmap configurations. An ImageBitmap configuration describes how pixels are
stored. This affects the quality (color depth) as well as the ability to display
transparent/translucent colors.


## Companion Object

#### Properties

<div class='sourceset sourceset-common'>Common</div>


```kotlin
val Argb8888 = ImageBitmapConfig(0)
```


Each pixel is stored on 4 bytes. Each channel (RGB and alpha for translucency) is stored
with 8 bits of precision (256 possible values.)

This configuration is very flexible and offers the best quality. It should be used
whenever possible.
    Use this formula to pack into 32 bits:
```
val color =  ((A and 0xff) shl 24) or  ((B and 0xff) shl 16) or  ((G and 0xff) shl 8) or  (R and 0xff)
```



<div class='sourceset sourceset-common'>Common</div>


```kotlin
val Alpha8 = ImageBitmapConfig(1)
```


Each pixel is stored as a single translucency (alpha) channel. This is very useful to
efficiently store masks for instance. No color information is stored. With this
configuration, each pixel requires 1 byte of memory.



<div class='sourceset sourceset-common'>Common</div>


```kotlin
val Rgb565 = ImageBitmapConfig(2)
```


Each pixel is stored on 2 bytes and only the RGB channels are encoded: red is stored with
5 bits of precision (32 possible values), green is stored with 6 bits of precision (64
possible values) and blue is stored with 5 bits of precision.

This configuration can produce slight visual artifacts depending on the configuration of
the source. For instance, without dithering, the result might show a greenish tint. To
get better results dithering should be applied.

This configuration may be useful when using opaque bitmaps that do not require high color
fidelity.
    Use this formula to pack into 16 bits:
```
 val color =    ((R and 0x1f) shl 11) or    ((G and 0x3f) shl 5) or    (B and 0x1f)
```



<div class='sourceset sourceset-common'>Common</div>


```kotlin
val F16 = ImageBitmapConfig(3)
```


Each pixel is stored on 8 bytes. Each channel (RGB and alpha for translucency) is stored
as a half-precision floating point value.

This configuration is particularly suited for wide-gamut and HDR content.
    Use this formula to pack into 64 bits:
```  val color =    ((A and 0xffff) shl 48) or    ((B and 0xffff) shl 32) or    ((G and 0xffff) shl 16) or    (R and 0xffff)
```



<div class='sourceset sourceset-common'>Common</div>


```kotlin
val Gpu = ImageBitmapConfig(4)
```


Special configuration, when an ImageBitmap is stored only in graphic memory. ImageBitmaps
in this configuration are always immutable.

It is optimal for cases, when the only operation with the ImageBitmap is to draw it on a
screen.