forked from sin365/AxibugEmuOnline
56 lines
2.0 KiB
C#
56 lines
2.0 KiB
C#
using System;
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using System.IO;
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using System.Linq;
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namespace StoicGoose.Common.Drawing
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{
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/* RGBA bitmap file format -- https://github.com/bzotto/rgba_bitmap
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* ".rgba is the dumbest possible image interchange format, now available for your programming pleasure."
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*/
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public class RgbaFile
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{
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const string expectedMagic = "RGBA";
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public string MagicNumber { get; protected set; }
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public uint Width { get; protected set; }
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public uint Height { get; protected set; }
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public byte[] PixelData { get; protected set; }
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public RgbaFile(string filename) : this(new FileStream(filename, FileMode.Open, FileAccess.Read, FileShare.ReadWrite)) { }
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public RgbaFile(Stream stream)
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{
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MagicNumber = ReadString(stream, 4);
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Width = ReadUInt32(stream);
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Height = ReadUInt32(stream);
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PixelData = new byte[Width * Height * 4];
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stream.Read(PixelData);
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}
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public RgbaFile(uint width, uint height, byte[] pixelData)
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{
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MagicNumber = expectedMagic;
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Width = width;
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Height = height;
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PixelData = pixelData;
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}
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public void Save(string filename) => Save(new FileStream(filename, FileMode.Create, FileAccess.Write, FileShare.ReadWrite));
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public void Save(Stream stream)
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{
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WriteString(stream, MagicNumber);
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WriteUInt32(stream, Width);
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WriteUInt32(stream, Height);
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stream.Write(PixelData);
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}
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private static string ReadString(Stream stream, int length) => new(Enumerable.Range(0, length).Select(_ => (char)stream.ReadByte()).ToArray());
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private static uint ReadUInt32(Stream stream) => (uint)(((stream.ReadByte() & 0xFF) << 24) | ((stream.ReadByte() & 0xFF) << 16) | ((stream.ReadByte() & 0xFF) << 8) | ((stream.ReadByte() & 0xFF) << 0));
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private static void WriteString(Stream stream, string str) => Array.ForEach(str.ToCharArray(), (x) => stream.WriteByte((byte)x));
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private static void WriteUInt32(Stream stream, uint val) { stream.WriteByte((byte)((val >> 24) & 0xFF)); stream.WriteByte((byte)((val >> 16) & 0xFF)); stream.WriteByte((byte)((val >> 8) & 0xFF)); stream.WriteByte((byte)((val >> 0) & 0xFF)); }
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}
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}
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