mirror of https://github.com/SixLabors/ImageSharp
Browse Source
# Conflicts: # src/ImageProcessorCore/Image.cs # tests/ImageProcessorCore.Tests/FileTestBase.cs Former-commit-id: df31902b9996a1027ac83bb3f4712cbf81ae6bb0 Former-commit-id: cdea3844dbe5a16b5272519be80d38b3d2d0fae2 Former-commit-id: ec4ffaa3de3f3ebe483e2f632c495406cf6627f3af/merge-core
James Jackson-South
10 years ago
9 changed files with 878 additions and 518 deletions
@ -1,19 +1,44 @@ |
|||||
namespace ImageProcessorCore.Formats |
// <copyright file="Block.cs" company="James Jackson-South">
|
||||
|
// Copyright (c) James Jackson-South and contributors.
|
||||
|
// Licensed under the Apache License, Version 2.0.
|
||||
|
// </copyright>
|
||||
|
|
||||
|
namespace ImageProcessorCore.Formats |
||||
{ |
{ |
||||
|
/// <summary>
|
||||
|
/// Represents an 8x8 block of coefficients to transform and encode.
|
||||
|
/// </summary>
|
||||
internal class Block |
internal class Block |
||||
{ |
{ |
||||
public const int blockSize = 64; |
/// <summary>
|
||||
private int[] _data; |
/// Gets the size of the block.
|
||||
|
/// </summary>
|
||||
|
public const int BlockSize = 64; |
||||
|
|
||||
|
/// <summary>
|
||||
|
/// The array of block data.
|
||||
|
/// </summary>
|
||||
|
private readonly int[] data; |
||||
|
|
||||
|
/// <summary>
|
||||
|
/// Initializes a new instance of the <see cref="Block"/> class.
|
||||
|
/// </summary>
|
||||
public Block() |
public Block() |
||||
{ |
{ |
||||
_data = new int[blockSize]; |
this.data = new int[BlockSize]; |
||||
} |
} |
||||
|
|
||||
public int this[int idx] |
/// <summary>
|
||||
|
/// Gets the pixel data at the given block index.
|
||||
|
/// </summary>
|
||||
|
/// <param name="index">The index of the data to return.</param>
|
||||
|
/// <returns>
|
||||
|
/// The <see cref="int"/>.
|
||||
|
/// </returns>
|
||||
|
public int this[int index] |
||||
{ |
{ |
||||
get { return _data[idx]; } |
get { return this.data[index]; } |
||||
set { _data[idx] = value; } |
set { this.data[index] = value; } |
||||
} |
} |
||||
} |
} |
||||
} |
} |
||||
|
|||||
@ -1 +1 @@ |
|||||
07d53b1f9ee1e867cfd8bb664c2cf3f31c0e8289 |
7a5076971068e0f389da2fb1e8b25216f4049718 |
||||
File diff suppressed because it is too large
@ -0,0 +1,209 @@ |
|||||
|
// <copyright file="JpegConstants.cs" company="James Jackson-South">
|
||||
|
// Copyright (c) James Jackson-South and contributors.
|
||||
|
// Licensed under the Apache License, Version 2.0.
|
||||
|
// </copyright>
|
||||
|
|
||||
|
namespace ImageProcessorCore.Formats |
||||
|
{ |
||||
|
/// <summary>
|
||||
|
/// Defines jpeg constants defined in the specification.
|
||||
|
/// </summary>
|
||||
|
internal static class JpegConstants |
||||
|
{ |
||||
|
/// <summary>
|
||||
|
/// The maximum allowable length in each dimension of a jpeg image.
|
||||
|
/// </summary>
|
||||
|
public const ushort MaxLength = 65535; |
||||
|
|
||||
|
/// <summary>
|
||||
|
/// Represents high detail chroma horizontal subsampling.
|
||||
|
/// </summary>
|
||||
|
public static readonly byte[] ChromaFourFourFourHorizontal = { 0x11, 0x11, 0x11 }; |
||||
|
|
||||
|
/// <summary>
|
||||
|
/// Represents high detail chroma vertical subsampling.
|
||||
|
/// </summary>
|
||||
|
public static readonly byte[] ChromaFourFourFourVertical = { 0x11, 0x11, 0x11 }; |
||||
|
|
||||
|
/// <summary>
|
||||
|
/// Represents medium detail chroma horizontal subsampling.
|
||||
|
/// </summary>
|
||||
|
public static readonly byte[] ChromaFourTwoTwoHorizontal = { 0x22, 0x11, 0x11 }; |
||||
|
|
||||
|
/// <summary>
|
||||
|
/// Represents medium detail chroma vertical subsampling.
|
||||
|
/// </summary>
|
||||
|
public static readonly byte[] ChromaFourTwoTwoVertical = { 0x11, 0x11, 0x11 }; |
||||
|
|
||||
|
/// <summary>
|
||||
|
/// Represents low detail chroma horizontal subsampling.
|
||||
|
/// </summary>
|
||||
|
public static readonly byte[] ChromaFourTwoZeroHorizontal = { 0x22, 0x11, 0x11 }; |
||||
|
|
||||
|
/// <summary>
|
||||
|
/// Represents low detail chroma vertical subsampling.
|
||||
|
/// </summary>
|
||||
|
public static readonly byte[] ChromaFourTwoZeroVertical = { 0x22, 0x11, 0x11 }; |
||||
|
|
||||
|
/// <summary>
|
||||
|
/// Describes component ids for start of frame components.
|
||||
|
/// </summary>
|
||||
|
internal static class Components |
||||
|
{ |
||||
|
/// <summary>
|
||||
|
/// The YCbCr luminance component id.
|
||||
|
/// </summary>
|
||||
|
public const byte Y = 1; |
||||
|
|
||||
|
/// <summary>
|
||||
|
/// The YCbCr chroma component id.
|
||||
|
/// </summary>
|
||||
|
public const byte Cb = 2; |
||||
|
|
||||
|
/// <summary>
|
||||
|
/// The YCbCr chroma component id.
|
||||
|
/// </summary>
|
||||
|
public const byte Cr = 3; |
||||
|
|
||||
|
/// <summary>
|
||||
|
/// The YIQ x coordinate component id.
|
||||
|
/// </summary>
|
||||
|
public const byte I = 4; |
||||
|
|
||||
|
/// <summary>
|
||||
|
/// The YIQ y coordinate component id.
|
||||
|
/// </summary>
|
||||
|
public const byte Q = 5; |
||||
|
} |
||||
|
|
||||
|
/// <summary>
|
||||
|
/// Describes common Jpeg markers
|
||||
|
/// </summary>
|
||||
|
internal static class Markers |
||||
|
{ |
||||
|
/// <summary>
|
||||
|
/// Marker prefix. Next byte is a marker.
|
||||
|
/// </summary>
|
||||
|
public const byte XFF = 0xff; |
||||
|
|
||||
|
/// <summary>
|
||||
|
/// Start of Image
|
||||
|
/// </summary>
|
||||
|
public const byte SOI = 0xd8; |
||||
|
|
||||
|
/// <summary>
|
||||
|
/// Start of Frame (baseline DCT)
|
||||
|
/// <remarks>
|
||||
|
/// Indicates that this is a baseline DCT-based JPEG, and specifies the width, height, number of components,
|
||||
|
/// and component subsampling (e.g., 4:2:0).
|
||||
|
/// </remarks>
|
||||
|
/// </summary>
|
||||
|
public const byte SOF0 = 0xc0; |
||||
|
|
||||
|
/// <summary>
|
||||
|
/// Start Of Frame (Extended Sequential DCT)
|
||||
|
/// <remarks>
|
||||
|
/// Indicates that this is a progressive DCT-based JPEG, and specifies the width, height, number of components,
|
||||
|
/// and component subsampling (e.g., 4:2:0).
|
||||
|
/// </remarks>
|
||||
|
/// </summary>
|
||||
|
public const byte SOF1 = 0xc1; |
||||
|
|
||||
|
/// <summary>
|
||||
|
/// Start Of Frame (progressive DCT)
|
||||
|
/// <remarks>
|
||||
|
/// Indicates that this is a progressive DCT-based JPEG, and specifies the width, height, number of components,
|
||||
|
/// and component subsampling (e.g., 4:2:0).
|
||||
|
/// </remarks>
|
||||
|
/// </summary>
|
||||
|
public const byte SOF2 = 0xc2; |
||||
|
|
||||
|
/// <summary>
|
||||
|
/// Define Huffman Table(s)
|
||||
|
/// <remarks>
|
||||
|
/// Specifies one or more Huffman tables.
|
||||
|
/// </remarks>
|
||||
|
/// </summary>
|
||||
|
public const byte DHT = 0xc4; |
||||
|
|
||||
|
/// <summary>
|
||||
|
/// Define Quantization Table(s)
|
||||
|
/// <remarks>
|
||||
|
/// Specifies one or more quantization tables.
|
||||
|
/// </remarks>
|
||||
|
/// </summary>
|
||||
|
public const byte DQT = 0xdb; |
||||
|
|
||||
|
/// <summary>
|
||||
|
/// Define Restart Interval
|
||||
|
/// <remarks>
|
||||
|
/// Specifies the interval between RSTn markers, in macroblocks. This marker is followed by two bytes
|
||||
|
/// indicating the fixed size so it can be treated like any other variable size segment.
|
||||
|
/// </remarks>
|
||||
|
/// </summary>
|
||||
|
public const byte DRI = 0xdd; |
||||
|
|
||||
|
/// <summary>
|
||||
|
/// Define First Restart
|
||||
|
/// <remarks>
|
||||
|
/// Inserted every r macroblocks, where r is the restart interval set by a DRI marker.
|
||||
|
/// Not used if there was no DRI marker. The low three bits of the marker code cycle in value from 0 to 7.
|
||||
|
/// </remarks>
|
||||
|
/// </summary>
|
||||
|
public const byte RST0 = 0xd0; |
||||
|
|
||||
|
/// <summary>
|
||||
|
/// Define Eigth Restart
|
||||
|
/// <remarks>
|
||||
|
/// Inserted every r macroblocks, where r is the restart interval set by a DRI marker.
|
||||
|
/// Not used if there was no DRI marker. The low three bits of the marker code cycle in value from 0 to 7.
|
||||
|
/// </remarks>
|
||||
|
/// </summary>
|
||||
|
public const byte RST7 = 0xd7; |
||||
|
|
||||
|
/// <summary>
|
||||
|
/// Start of Scan
|
||||
|
/// <remarks>
|
||||
|
/// Begins a top-to-bottom scan of the image. In baseline DCT JPEG images, there is generally a single scan.
|
||||
|
/// Progressive DCT JPEG images usually contain multiple scans. This marker specifies which slice of data it
|
||||
|
/// will contain, and is immediately followed by entropy-coded data.
|
||||
|
/// </remarks>
|
||||
|
/// </summary>
|
||||
|
public const byte SOS = 0xda; |
||||
|
|
||||
|
/// <summary>
|
||||
|
/// Comment
|
||||
|
/// <remarks>
|
||||
|
/// Contains a text comment.
|
||||
|
/// </remarks>
|
||||
|
/// </summary>
|
||||
|
public const byte COM = 0xfe; |
||||
|
|
||||
|
/// <summary>
|
||||
|
/// End of Image
|
||||
|
/// </summary>
|
||||
|
public const byte EOI = 0xd9; |
||||
|
|
||||
|
/// <summary>
|
||||
|
/// Application specific marker for marking the jpeg format.
|
||||
|
/// <see href="http://www.sno.phy.queensu.ca/~phil/exiftool/TagNames/JPEG.html"/>
|
||||
|
/// </summary>
|
||||
|
public const byte APP0 = 0xe0; |
||||
|
|
||||
|
/// <summary>
|
||||
|
/// Application specific marker for marking where to store metadata.
|
||||
|
/// </summary>
|
||||
|
public const byte APP1 = 0xe1; |
||||
|
|
||||
|
/// <summary>
|
||||
|
/// Application specific marker used by Adobe for storing encoding information for DCT filters.
|
||||
|
/// </summary>
|
||||
|
public const byte APP14 = 0xee; |
||||
|
|
||||
|
/// <summary>
|
||||
|
/// Application specific marker used by GraphicConverter to store JPEG quality.
|
||||
|
/// </summary>
|
||||
|
public const byte APP15 = 0xef; |
||||
|
} |
||||
|
} |
||||
|
} |
||||
Loading…
Reference in new issue