mirror of https://github.com/SixLabors/ImageSharp
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
47 lines
1.4 KiB
47 lines
1.4 KiB
// <copyright file="PngFormat.cs" company="James Jackson-South">
|
|
// Copyright (c) James Jackson-South and contributors.
|
|
// Licensed under the Apache License, Version 2.0.
|
|
// </copyright>
|
|
|
|
namespace ImageSharp.Formats
|
|
{
|
|
using System.Collections.Generic;
|
|
|
|
/// <summary>
|
|
/// Encapsulates the means to encode and decode png images.
|
|
/// </summary>
|
|
public class PngFormat : IImageFormat
|
|
{
|
|
/// <inheritdoc/>
|
|
public string MimeType => "image/png";
|
|
|
|
/// <inheritdoc/>
|
|
public string Extension => "png";
|
|
|
|
/// <inheritdoc/>
|
|
public IEnumerable<string> SupportedExtensions => new string[] { "png" };
|
|
|
|
/// <inheritdoc/>
|
|
public IImageDecoder Decoder => new PngDecoder();
|
|
|
|
/// <inheritdoc/>
|
|
public IImageEncoder Encoder => new PngEncoder();
|
|
|
|
/// <inheritdoc/>
|
|
public int HeaderSize => 8;
|
|
|
|
/// <inheritdoc/>
|
|
public bool IsSupportedFileFormat(byte[] header)
|
|
{
|
|
return header.Length >= this.HeaderSize &&
|
|
header[0] == 0x89 &&
|
|
header[1] == 0x50 && // P
|
|
header[2] == 0x4E && // N
|
|
header[3] == 0x47 && // G
|
|
header[4] == 0x0D && // CR
|
|
header[5] == 0x0A && // LF
|
|
header[6] == 0x1A && // EOF
|
|
header[7] == 0x0A; // LF
|
|
}
|
|
}
|
|
}
|
|
|
