using System;

namespace Hjg.Pngcs.Chunks
{
	// Token: 0x02000017 RID: 23
	public class PngChunkSBIT : PngChunkSingle
	{
		// Token: 0x17000009 RID: 9
		// (get) Token: 0x060000A8 RID: 168 RVA: 0x00003EA9 File Offset: 0x000020A9
		// (set) Token: 0x060000A9 RID: 169 RVA: 0x00003EB1 File Offset: 0x000020B1
		public int Graysb { get; set; }

		// Token: 0x1700000A RID: 10
		// (get) Token: 0x060000AA RID: 170 RVA: 0x00003EBA File Offset: 0x000020BA
		// (set) Token: 0x060000AB RID: 171 RVA: 0x00003EC2 File Offset: 0x000020C2
		public int Alphasb { get; set; }

		// Token: 0x1700000B RID: 11
		// (get) Token: 0x060000AC RID: 172 RVA: 0x00003ECB File Offset: 0x000020CB
		// (set) Token: 0x060000AD RID: 173 RVA: 0x00003ED3 File Offset: 0x000020D3
		public int Redsb { get; set; }

		// Token: 0x1700000C RID: 12
		// (get) Token: 0x060000AE RID: 174 RVA: 0x00003EDC File Offset: 0x000020DC
		// (set) Token: 0x060000AF RID: 175 RVA: 0x00003EE4 File Offset: 0x000020E4
		public int Greensb { get; set; }

		// Token: 0x1700000D RID: 13
		// (get) Token: 0x060000B0 RID: 176 RVA: 0x00003EED File Offset: 0x000020ED
		// (set) Token: 0x060000B1 RID: 177 RVA: 0x00003EF5 File Offset: 0x000020F5
		public int Bluesb { get; set; }

		// Token: 0x060000B2 RID: 178 RVA: 0x00003EFE File Offset: 0x000020FE
		public PngChunkSBIT(ImageInfo info)
			: base("sBIT", info)
		{
		}

		// Token: 0x060000B3 RID: 179 RVA: 0x00003F0C File Offset: 0x0000210C
		public override PngChunk.ChunkOrderingConstraint GetOrderingConstraint()
		{
			return PngChunk.ChunkOrderingConstraint.BEFORE_PLTE_AND_IDAT;
		}

		// Token: 0x060000B4 RID: 180 RVA: 0x00003F10 File Offset: 0x00002110
		public override void ParseFromRaw(ChunkRaw c)
		{
			if (c.Length != this.GetLen())
			{
				throw new PngjException("bad chunk length " + c);
			}
			if (this.ImgInfo.Greyscale)
			{
				this.Graysb = PngHelperInternal.ReadInt1fromByte(c.Data, 0);
				if (this.ImgInfo.Alpha)
				{
					this.Alphasb = PngHelperInternal.ReadInt1fromByte(c.Data, 1);
					return;
				}
			}
			else
			{
				this.Redsb = PngHelperInternal.ReadInt1fromByte(c.Data, 0);
				this.Greensb = PngHelperInternal.ReadInt1fromByte(c.Data, 1);
				this.Bluesb = PngHelperInternal.ReadInt1fromByte(c.Data, 2);
				if (this.ImgInfo.Alpha)
				{
					this.Alphasb = PngHelperInternal.ReadInt1fromByte(c.Data, 3);
				}
			}
		}

		// Token: 0x060000B5 RID: 181 RVA: 0x00003FD0 File Offset: 0x000021D0
		public override ChunkRaw CreateRawChunk()
		{
			ChunkRaw chunkRaw = base.createEmptyChunk(this.GetLen(), true);
			if (this.ImgInfo.Greyscale)
			{
				chunkRaw.Data[0] = (byte)this.Graysb;
				if (this.ImgInfo.Alpha)
				{
					chunkRaw.Data[1] = (byte)this.Alphasb;
				}
			}
			else
			{
				chunkRaw.Data[0] = (byte)this.Redsb;
				chunkRaw.Data[1] = (byte)this.Greensb;
				chunkRaw.Data[2] = (byte)this.Bluesb;
				if (this.ImgInfo.Alpha)
				{
					chunkRaw.Data[3] = (byte)this.Alphasb;
				}
			}
			return chunkRaw;
		}

		// Token: 0x060000B6 RID: 182 RVA: 0x00004074 File Offset: 0x00002274
		public override void CloneDataFromRead(PngChunk other)
		{
			PngChunkSBIT pngChunkSBIT = (PngChunkSBIT)other;
			this.Graysb = pngChunkSBIT.Graysb;
			this.Redsb = pngChunkSBIT.Redsb;
			this.Greensb = pngChunkSBIT.Greensb;
			this.Bluesb = pngChunkSBIT.Bluesb;
			this.Alphasb = pngChunkSBIT.Alphasb;
		}

		// Token: 0x060000B7 RID: 183 RVA: 0x000040C4 File Offset: 0x000022C4
		private int GetLen()
		{
			int num = (this.ImgInfo.Greyscale ? 1 : 3);
			if (this.ImgInfo.Alpha)
			{
				num++;
			}
			return num;
		}

		// Token: 0x0400005F RID: 95
		public const string ID = "sBIT";
	}
}