Home/ Questions/Q 6074121
In Process

The Archive Base Latest Questions

Editorial Team
  • 0
Asked: 2026-05-23T10:20:48+00:00

I am using DevExpress Image and there is a property IsPng that will indicate

  • 0

I am using DevExpress Image and there is a property “IsPng” that will indicate whether this in an png image or not so i am curious how does it matter if it is png image or not ?

Share

Leave an answer

You must login to add an answer.

Need An Account,

1 Answer

  1. Editorial Team

    The main feature PNG features over other “web” image formats is that PNG support alpha-transparency.

    “Also known as a mask channel, an
    alpha channel is simply a way to
    associate variable transparency with
    an image. Whereas GIF supports simple
    binary transparency–any given pixel
    can be either fully transparent or
    fully opaque–PNG allows up to 254
    levels of partial transparency in
    between for “normal” images (or 65,534
    levels for the special “deeply insane”
    formats, but here we’re concentrating
    on image depths that are useful on the
    Web).”

    See http://www.w3.org/TR/PNG-DataRep.html#DR.Alpha-channel

    This means you can overlay PNGs over other images and text and allow them to “show through” at variable degrees of transparency. You can view some W3C tests at http://www.w3.org/Graphics/PNG/inline-alpha.html

    • 0