public ImagePackage(IImageDecoder decoder, ImageSource source, double width, double height)
{
this.Decoder = decoder;
this.ImageSource = source;
this.PixelWidth = width;
this.PixelHeight = height;
}
/// <summary>
/// Sets a specific image decoder as the decoder for a specific image format.
/// </summary>
/// <param name="imageFormat">The image format to register the encoder for.</param>
/// <param name="decoder">The decoder to use,</param>
public void SetDecoder(IImageFormat imageFormat, IImageDecoder decoder)
{
Guard.NotNull(imageFormat, nameof(imageFormat));
Guard.NotNull(decoder, nameof(decoder));
this.AddImageFormat(imageFormat);
this.mimeTypeDecoders.AddOrUpdate(imageFormat, decoder, (s, e) => decoder);
}
public Key(PixelTypes pixelType, string filePath, IImageDecoder customDecoder)
{
Type customType = customDecoder?.GetType();
this.commonValues = new Tuple <PixelTypes, string, Type>(pixelType, filePath, customType);
this.decoderParameters = GetDecoderParameters(customDecoder);
}
private void DecodeJpegBenchmarkImpl(string fileName, IImageDecoder decoder)
{
// do not run this on CI even by accident
if (TestEnvironment.RunsOnCI)
{
return;
}
const int ExecutionCount = 30;
if (!Vector.IsHardwareAccelerated)
{
throw new Exception("Vector.IsHardwareAccelerated == false! ('prefer32 bit' enabled?)");
}
string path = TestFile.GetInputFileFullPath(fileName);
byte[] bytes = File.ReadAllBytes(path);
this.Measure(
ExecutionCount,
() =>
{
Image <Rgba32> img = Image.Load <Rgba32>(bytes, decoder);
},
// ReSharper disable once ExplicitCallerInfoArgument
$"Decode {fileName}");
}
public static Image <TPixel> CompareToOriginal <TPixel>(
this Image <TPixel> image,
ITestImageProvider provider,
ImageComparer comparer,
IImageDecoder referenceDecoder = null)
where TPixel : struct, IPixel <TPixel>
{
string path = TestImageProvider <TPixel> .GetFilePathOrNull(provider);
if (path == null)
{
throw new InvalidOperationException("CompareToOriginal() works only with file providers!");
}
var testFile = TestFile.Create(path);
referenceDecoder = referenceDecoder ?? TestEnvironment.GetReferenceDecoder(path);
using (var original = Image.Load <TPixel>(testFile.Bytes, referenceDecoder))
{
comparer.VerifySimilarity(original, image);
}
return(image);
}
/// <summary>
/// Loads the expected image with a reference decoder + compares it to <paramref name="image"/>.
/// Also performs a debug save using <see cref="ImagingTestCaseUtility.SaveTestOutputFile{TPixel}"/>.
/// </summary>
internal static void VerifyEncoder <TPixel>(
this Image <TPixel> image,
ITestImageProvider provider,
string extension,
object testOutputDetails,
IImageEncoder encoder,
ImageComparer customComparer = null,
bool appendPixelTypeToFileName = true,
string referenceImageExtension = null,
IImageDecoder referenceDecoder = null)
where TPixel : struct, IPixel <TPixel>
{
string actualOutputFile = provider.Utility.SaveTestOutputFile(
image,
extension,
encoder,
testOutputDetails,
appendPixelTypeToFileName);
referenceDecoder = referenceDecoder ?? TestEnvironment.GetReferenceDecoder(actualOutputFile);
using (var actualImage = Image.Load <TPixel>(actualOutputFile, referenceDecoder))
{
ImageComparer comparer = customComparer ?? ImageComparer.Exact;
comparer.VerifySimilarity(actualImage, image);
}
}
/// <summary>
/// Compares the image against the expected Reference output, throws an exception if the images are not similar enough.
/// The output file should be named identically to the output produced by <see cref="DebugSave{TPixel}(Image{TPixel}, ITestImageProvider, object, string, bool)"/>.
/// </summary>
/// <typeparam name="TPixel">The pixel format</typeparam>
/// <param name="image">The image</param>
/// <param name="comparer">The <see cref="ImageComparer"/> to use</param>
/// <param name="provider">The image provider</param>
/// <param name="testOutputDetails">Details to be concatenated to the test output file, describing the parameters of the test.</param>
/// <param name="extension">The extension</param>
/// <param name="grayscale">A boolean indicating whether we should debug save + compare against a grayscale image, smaller in size.</param>
/// <param name="appendPixelTypeToFileName">A boolean indicating whether to append the pixel type to the output file name.</param>
/// <param name="appendSourceFileOrDescription">A boolean indicating whether to append <see cref="ITestImageProvider.SourceFileOrDescription"/> to the test output file name.</param>
/// <param name="decoder">A custom decoder.</param>
/// <returns></returns>
public static Image <TPixel> CompareToReferenceOutput <TPixel>(
this Image <TPixel> image,
ImageComparer comparer,
ITestImageProvider provider,
object testOutputDetails = null,
string extension = "png",
bool grayscale = false,
bool appendPixelTypeToFileName = true,
bool appendSourceFileOrDescription = true,
IImageDecoder decoder = null)
where TPixel : struct, IPixel <TPixel>
{
using (Image <TPixel> referenceImage = GetReferenceOutputImage <TPixel>(
provider,
testOutputDetails,
extension,
appendPixelTypeToFileName,
appendSourceFileOrDescription,
decoder))
{
comparer.VerifySimilarity(referenceImage, image);
}
return(image);
}
/// <summary>
/// Create a new instance of the <see cref="Image"/> class from the given file.
/// </summary>
/// <param name="config">The Configuration.</param>
/// <param name="path">The file path to the image.</param>
/// <param name="decoder">The decoder.</param>
/// <exception cref="NotSupportedException">
/// Thrown if the stream is not readable nor seekable.
/// </exception>
/// <returns>The <see cref="Image"/>.</returns>
public static Image Load(Configuration config, string path, IImageDecoder decoder)
{
using (Stream stream = config.FileSystem.OpenRead(path))
{
return(Load(config, stream, decoder));
}
}
/// <summary>
/// Loads the image from the given byte array.
/// </summary>
/// <param name="data">The byte array containing image data.</param>
/// <param name="decoder">The decoder.</param>
/// <param name="options">The options for the decoder.</param>
/// <exception cref="NotSupportedException">
/// Thrown if the stream is not readable nor seekable.
/// </exception>
/// <returns>The image</returns>
public static Image Load(byte[] data, IImageDecoder decoder, IDecoderOptions options)
{
using (MemoryStream ms = new MemoryStream(data))
{
return(Load(ms, decoder, options));
}
}
/// <summary>
/// Decode first frame for the specified file.
/// </summary>
///
/// <param name="fileName">File name to read image from.</param>
/// <param name="imageInfo">Information about the decoded image.</param>
///
/// <returns>Return decoded image. In the case if file format support multiple
/// frames, the method return the first frame.</returns>
///
/// <remarks><para>The method uses table of registered image decoders to find the one,
/// which should be used for the specified file. If there is not appropriate decoder
/// found, the method uses default .NET's image decoding routine (see
/// <see cref="System.Drawing.Image.FromFile(string)"/>).</para></remarks>
///
public static Bitmap DecodeFromFile(string fileName, out ImageInfo imageInfo)
{
string fileExtension = FormatDecoderAttribute.GetNormalizedExtension(fileName);
IImageDecoder decoder = FormatDecoderAttribute.GetDecoders(fileExtension, decoderTypes, decoders.Value);
if (decoder != null)
{
// open stream
using (FileStream stream = new FileStream(fileName, FileMode.Open, FileAccess.Read))
{
// open decoder
decoder.Open(stream);
// read the first frame from the image
Bitmap bitmap = decoder.DecodeFrame(0, out imageInfo);
// close the decoder and return the bitmap
decoder.Close();
return(bitmap);
}
}
else
{
// use default .NET's image decoding routine
Bitmap bitmap = FromFile(fileName);
decoderTypes[fileExtension] = null; // mark that the file could be loaded using default .NET decoders
imageInfo = new ImageInfo(bitmap.Width, bitmap.Height, Image.GetPixelFormatSize(bitmap.PixelFormat), 0, 1);
return(bitmap);
}
}
private async Task LoadDecoderAsync()
{
_rawStream.Position = _originalPosition;
Stream rawImageReaderStream = _imageFormat.CreateReader().CreateInputStream(_rawStream, true);
_imageDecoder = _imageDecoderFactory.BuildDecoder(rawImageReaderStream, _decodingConfiguration);
_imageReaderStream = await _imageDecoder.GetDataReaderStreamAsync(rawImageReaderStream);
}
/// <summary>
/// Create a new instance of the <see cref="Image{TPixel}"/> class from the given byte array.
/// </summary>
/// <param name="data">The byte array containing image data.</param>
/// <param name="decoder">The decoder.</param>
/// <param name="options">The options for the decoder.</param>
/// <typeparam name="TPixel">The pixel format.</typeparam>
/// <returns>A new <see cref="Image{TPixel}"/>.</returns>
public static Image <TPixel> Load <TPixel>(byte[] data, IImageDecoder decoder, IDecoderOptions options)
where TPixel : struct, IPixel <TPixel>
{
using (var ms = new MemoryStream(data))
{
return(Load <TPixel>(ms, decoder, options));
}
}
public static Image <TPixel> CompareToOriginal <TPixel>(
this Image <TPixel> image,
ITestImageProvider provider,
IImageDecoder referenceDecoder = null)
where TPixel : unmanaged, IPixel <TPixel>
{
return(CompareToOriginal(image, provider, ImageComparer.Tolerant(), referenceDecoder));
}
/// <summary>
///
/// </summary>
/// <param name="stream"></param>
/// <param name="SavePath"></param>
/// <param name="ImageDecoder"></param>
/// <param name="Size"></param>
public void CreateSmallPic(Stream stream, string SavePath, IImageDecoder ImageDecoder, int Size)
{
Image <Rgba32> image = Image.Load(stream, ImageDecoder);
ReSize(ref image, Size);
SaveThumbPic(ref image, SavePath);
image.Dispose();//销毁
}
/// <summary>
/// Create a new instance of the <see cref="Image"/> class from the given file.
/// </summary>
/// <param name="configuration">The Configuration.</param>
/// <param name="path">The file path to the image.</param>
/// <param name="decoder">The decoder.</param>
/// <exception cref="NotSupportedException">
/// Thrown if the stream is not readable nor seekable.
/// </exception>
/// <returns>The <see cref="Image"/>.</returns>
public static Image Load(Configuration configuration, string path, IImageDecoder decoder)
{
Guard.NotNull(configuration, nameof(configuration));
using (Stream stream = configuration.FileSystem.OpenRead(path))
{
return(Load(configuration, stream, decoder));
}
}
/// <summary>
/// Create a new instance of the <see cref="Image{TPixel}"/> class from the given byte array.
/// </summary>
/// <param name="data">The byte array containing image data.</param>
/// <param name="decoder">The decoder.</param>
/// <typeparam name="TPixel">The pixel format.</typeparam>
/// <returns>A new <see cref="Image{TPixel}"/>.</returns>
public static Image <TPixel> Load <TPixel>(byte[] data, IImageDecoder decoder)
where TPixel : struct, IPixel <TPixel>
{
using (var memoryStream = new MemoryStream(data))
{
return(Load <TPixel>(memoryStream, decoder));
}
}
/// <summary>
/// Load a new instance of <see cref="Image{TPixel}"/> from the given encoded byte array.
/// </summary>
/// <param name="data">The byte array containing encoded image data.</param>
/// <param name="decoder">The decoder.</param>
/// <typeparam name="TPixel">The pixel format.</typeparam>
/// <returns>A new <see cref="Image{TPixel}"/>.</returns>
public static Image <TPixel> Load <TPixel>(byte[] data, IImageDecoder decoder)
where TPixel : struct, IPixel <TPixel>
{
using (var stream = new MemoryStream(data, 0, data.Length, false, true))
{
return(Load <TPixel>(stream, decoder));
}
}
static ConversionResult Convert(Stream stream, string extension, IImageDecoder decoder)
{
var image = Image.Load(stream, decoder);
stream.Position = 0;
var info = image.GetInfo();
return(new(info, extension, stream));
}
public override Task <Image <TPixel> > GetImageAsync(IImageDecoder decoder)
{
Guard.NotNull(decoder, nameof(decoder));
// Used in small subset of decoder tests, no caching.
string path = Path.Combine(TestEnvironment.InputImagesDirectoryFullPath, this.FilePath);
return(Image.LoadAsync <TPixel>(this.Configuration, path, decoder));
}
private static void TestPngEncoderCore <TPixel>(
TestImageProvider <TPixel> provider,
PngColorType pngColorType,
PngFilterMethod pngFilterMethod,
PngBitDepth bitDepth,
PngInterlaceMode interlaceMode,
PngCompressionLevel compressionLevel = PngCompressionLevel.DefaultCompression,
int paletteSize = 255,
bool appendPngColorType = false,
bool appendPngFilterMethod = false,
bool appendPixelType = false,
bool appendCompressionLevel = false,
bool appendPaletteSize = false,
bool appendPngBitDepth = false,
PngChunkFilter optimizeMethod = PngChunkFilter.None)
where TPixel : unmanaged, IPixel <TPixel>
{
using (Image <TPixel> image = provider.GetImage())
{
var encoder = new PngEncoder
{
ColorType = pngColorType,
FilterMethod = pngFilterMethod,
CompressionLevel = compressionLevel,
BitDepth = bitDepth,
Quantizer = new WuQuantizer(new QuantizerOptions {
MaxColors = paletteSize
}),
InterlaceMethod = interlaceMode,
ChunkFilter = optimizeMethod,
};
string pngColorTypeInfo = appendPngColorType ? pngColorType.ToString() : string.Empty;
string pngFilterMethodInfo = appendPngFilterMethod ? pngFilterMethod.ToString() : string.Empty;
string compressionLevelInfo = appendCompressionLevel ? $"_C{compressionLevel}" : string.Empty;
string paletteSizeInfo = appendPaletteSize ? $"_PaletteSize-{paletteSize}" : string.Empty;
string pngBitDepthInfo = appendPngBitDepth ? bitDepth.ToString() : string.Empty;
string pngInterlaceModeInfo = interlaceMode != PngInterlaceMode.None ? $"_{interlaceMode}" : string.Empty;
string debugInfo = $"{pngColorTypeInfo}{pngFilterMethodInfo}{compressionLevelInfo}{paletteSizeInfo}{pngBitDepthInfo}{pngInterlaceModeInfo}";
string actualOutputFile = provider.Utility.SaveTestOutputFile(image, "png", encoder, debugInfo, appendPixelType);
// Compare to the Magick reference decoder.
IImageDecoder referenceDecoder = TestEnvironment.GetReferenceDecoder(actualOutputFile);
// We compare using both our decoder and the reference decoder as pixel transformation
// occurs within the encoder itself leaving the input image unaffected.
// This means we are benefiting from testing our decoder also.
using (var imageSharpImage = Image.Load <TPixel>(actualOutputFile, new PngDecoder()))
using (var referenceImage = Image.Load <TPixel>(actualOutputFile, referenceDecoder))
{
ImageComparer.Exact.VerifySimilarity(referenceImage, imageSharpImage);
}
}
}
private static void TestPngEncoderCore <TPixel>(
TestImageProvider <TPixel> provider,
PngColorType pngColorType,
int compressionLevel = 6,
int paletteSize = 255,
bool appendPngColorType = false,
bool appendPixelType = false,
bool appendCompressionLevel = false,
bool appendPaletteSize = false)
where TPixel : struct, IPixel <TPixel>
{
using (Image <TPixel> image = provider.GetImage())
{
if (!HasAlpha(pngColorType))
{
image.Mutate(c => c.MakeOpaque());
}
var encoder = new PngEncoder
{
PngColorType = pngColorType,
CompressionLevel = compressionLevel,
Quantizer = new WuQuantizer(paletteSize)
};
string pngColorTypeInfo = appendPngColorType ? pngColorType.ToString() : "";
string compressionLevelInfo = appendCompressionLevel ? $"_C{compressionLevel}" : "";
string paletteSizeInfo = appendPaletteSize ? $"_PaletteSize-{paletteSize}" : "";
string debugInfo = $"{pngColorTypeInfo}{compressionLevelInfo}{paletteSizeInfo}";
//string referenceInfo = $"{pngColorTypeInfo}";
// Does DebugSave & load reference CompareToReferenceInput():
string actualOutputFile = ((ITestImageProvider)provider).Utility.SaveTestOutputFile(image, "png", encoder, debugInfo, appendPixelType);
if (TestEnvironment.IsMono)
{
// There are bugs in mono's System.Drawing implementation, reference decoders are not always reliable!
return;
}
IImageDecoder referenceDecoder = TestEnvironment.GetReferenceDecoder(actualOutputFile);
string referenceOutputFile = ((ITestImageProvider)provider).Utility.GetReferenceOutputFileName("png", debugInfo, appendPixelType);
using (var actualImage = Image.Load <TPixel>(actualOutputFile, referenceDecoder))
using (var referenceImage = Image.Load <TPixel>(referenceOutputFile, referenceDecoder))
{
float paletteToleranceHack = 80f / paletteSize;
paletteToleranceHack = paletteToleranceHack * paletteToleranceHack;
ImageComparer comparer = pngColorType == PngColorType.Palette
? ImageComparer.Tolerant(ToleranceThresholdForPaletteEncoder * paletteToleranceHack)
: ImageComparer.Exact;
comparer.VerifySimilarity(referenceImage, actualImage);
}
}
}
/// <summary>
/// Load a new instance of <see cref="Image{TPixel}"/> from the given encoded byte array.
/// </summary>
/// <param name="data">The byte array containing encoded image data.</param>
/// <param name="decoder">The decoder.</param>
/// <typeparam name="TPixel">The pixel format.</typeparam>
/// <exception cref="ArgumentNullException">The data is null.</exception>
/// <exception cref="UnknownImageFormatException">Image format not recognised.</exception>
/// <exception cref="InvalidImageContentException">Image contains invalid content.</exception>
/// <returns>A new <see cref="Image{TPixel}"/>.</returns>
public static Image <TPixel> Load <TPixel>(byte[] data, IImageDecoder decoder)
where TPixel : unmanaged, IPixel <TPixel>
{
Guard.NotNull(data, nameof(data));
using (var stream = new MemoryStream(data, 0, data.Length, false, true))
{
return(Load <TPixel>(stream, decoder));
}
}
public void GetReferenceDecoder_ReturnsCorrectDecoders_Windows(string fileName, Type expectedDecoderType)
{
if (!TestEnvironment.IsWindows)
{
return;
}
IImageDecoder decoder = TestEnvironment.GetReferenceDecoder(fileName);
Assert.IsType(expectedDecoderType, decoder);
}
/// <summary>
/// Loads the image from the given file.
/// </summary>
/// <typeparam name="TColor">The pixel format.</typeparam>
/// <param name="path">The file path to the image.</param>
/// <param name="decoder">The decoder.</param>
/// <param name="options">The options for the decoder.</param>
/// <exception cref="NotSupportedException">
/// Thrown if the stream is not readable nor seekable.
/// </exception>
/// <returns>The image</returns>
public static Image <TColor> Load <TColor>(string path, IImageDecoder decoder, IDecoderOptions options)
where TColor : struct, IPixel <TColor>
{
Configuration config = Configuration.Default;
using (Stream s = config.FileSystem.OpenRead(path))
{
return(Load <TColor>(s, decoder, options));
}
}
/// <summary>
/// By reading the header on the provided stream this calculates the images format.
/// </summary>
/// <param name="stream">The image stream to read the header from.</param>
/// <param name="config">The configuration.</param>
/// <returns>The decoder and the image format or null if none found.</returns>
private static async Task <(IImageDecoder decoder, IImageFormat format)> DiscoverDecoderAsync(Stream stream, Configuration config)
{
IImageFormat format = await InternalDetectFormatAsync(stream, config).ConfigureAwait(false);
IImageDecoder decoder = format != null
? config.ImageFormatsManager.FindDecoder(format)
: null;
return(decoder, format);
}
private static void TestMetaDataImpl(
bool useIdentify,
IImageDecoder decoder,
string imagePath,
int expectedPixelSize,
bool exifProfilePresent,
bool iccProfilePresent)
{
var testFile = TestFile.Create(imagePath);
using (var stream = new MemoryStream(testFile.Bytes, false))
{
IImageInfo imageInfo = useIdentify
? ((IImageInfoDetector)decoder).Identify(Configuration.Default, stream)
: decoder.Decode <Rgba32>(Configuration.Default, stream);
Assert.NotNull(imageInfo);
Assert.NotNull(imageInfo.PixelType);
if (useIdentify)
{
Assert.Equal(expectedPixelSize, imageInfo.PixelType.BitsPerPixel);
}
else
{
// When full Image<TPixel> decoding is performed, BitsPerPixel will match TPixel
int bpp32 = Unsafe.SizeOf <Rgba32>() * 8;
Assert.Equal(bpp32, imageInfo.PixelType.BitsPerPixel);
}
ExifProfile exifProfile = imageInfo.MetaData.ExifProfile;
if (exifProfilePresent)
{
Assert.NotNull(exifProfile);
Assert.NotEmpty(exifProfile.Values);
}
else
{
Assert.Null(exifProfile);
}
IccProfile iccProfile = imageInfo.MetaData.IccProfile;
if (iccProfilePresent)
{
Assert.NotNull(iccProfile);
Assert.NotEmpty(iccProfile.Entries);
}
else
{
Assert.Null(iccProfile);
}
}
}
/// <summary>
/// Async loading image from cache or network
/// </summary>
/// <param name="imageUri">Uri of the image to load</param>
/// <returns>BitmapImage if load was successfull or null otherwise</returns>
public virtual async Task <ImagePackage> LoadImage(Image image, Uri uriSource,
CancellationTokenSource cancellationTokenSource)
{
CheckConfig();
ImagePackage imagePackage = null;
var decoders = this.GetAvailableDecoders();
var randStream = await this.LoadImageStream(uriSource, cancellationTokenSource);
if (randStream == null)
{
throw new Exception("stream is null");
}
if (decoders.Count > 0)
{
int maxHeaderSize = decoders.Max(x => x.HeaderSize);
if (maxHeaderSize > 0)
{
byte[] header = new byte[maxHeaderSize];
var readStream = randStream.AsStreamForRead();
readStream.Position = 0;
await readStream.ReadAsync(header, 0, maxHeaderSize);
readStream.Position = 0;
int maxPriority = -1;
IImageDecoder decoder = null;
foreach (var item in decoders)
{
var priority = item.GetPriority(header);
if (priority > maxPriority)
{
maxPriority = priority;
decoder = item;
}
}
if (decoder != null)
{
var package = await decoder.InitializeAsync(image.Dispatcher, image, uriSource, randStream, cancellationTokenSource);
if (!cancellationTokenSource.IsCancellationRequested)
{
imagePackage = package;
//imagePackage?.Decoder?.Start();
}
}
}
}
return(imagePackage);
//var bitmapImage = new BitmapImage();
//var stream = await LoadImageStream(imageUri, cancellationTokenSource);
//await bitmapImage.SetSourceAsync(stream);
//return bitmapImage;
}
private static void ConfigureCodecs(
this Configuration cfg,
IImageFormat imageFormat,
IImageDecoder decoder,
IImageEncoder encoder,
IImageFormatDetector detector)
{
cfg.ImageFormatsManager.SetDecoder(imageFormat, decoder);
cfg.ImageFormatsManager.SetEncoder(imageFormat, encoder);
cfg.ImageFormatsManager.AddImageFormatDetector(detector);
}
/// <summary>
/// Create a new instance of the <see cref="Image"/> class from the given file.
/// </summary>
/// <param name="configuration">The Configuration.</param>
/// <param name="path">The file path to the image.</param>
/// <param name="decoder">The decoder.</param>
/// <param name="cancellationToken">The token to monitor for cancellation requests.</param>
/// <exception cref="ArgumentNullException">The configuration is null.</exception>
/// <exception cref="ArgumentNullException">The path is null.</exception>
/// <exception cref="ArgumentNullException">The decoder is null.</exception>
/// <exception cref="UnknownImageFormatException">Image format not recognised.</exception>
/// <exception cref="NotSupportedException">Image format is not supported.</exception>
/// <exception cref="InvalidImageContentException">Image contains invalid content.</exception>
/// <returns>A <see cref="Task{Image}"/> representing the asynchronous operation.</returns>
public static Task <Image> LoadAsync(
Configuration configuration,
string path,
IImageDecoder decoder,
CancellationToken cancellationToken = default)
{
Guard.NotNull(configuration, nameof(configuration));
Guard.NotNull(path, nameof(path));
using Stream stream = configuration.FileSystem.OpenRead(path);
return(LoadAsync(configuration, stream, decoder, cancellationToken));
}
private static void TestMetadataImpl(
bool useIdentify,
IImageDecoder decoder,
string imagePath,
int expectedPixelSize,
bool exifProfilePresent,
bool iccProfilePresent)
{
TestImageInfo(
imagePath,
decoder,
useIdentify,
imageInfo =>
{
Assert.NotNull(imageInfo);
Assert.NotNull(imageInfo.PixelType);
if (useIdentify)
{
Assert.Equal(expectedPixelSize, imageInfo.PixelType.BitsPerPixel);
}
else
{
// When full Image<TPixel> decoding is performed, BitsPerPixel will match TPixel
int bpp32 = Unsafe.SizeOf <Rgba32>() * 8;
Assert.Equal(bpp32, imageInfo.PixelType.BitsPerPixel);
}
ExifProfile exifProfile = imageInfo.Metadata.ExifProfile;
if (exifProfilePresent)
{
Assert.NotNull(exifProfile);
Assert.NotEmpty(exifProfile.Values);
}
else
{
Assert.Null(exifProfile);
}
IccProfile iccProfile = imageInfo.Metadata.IccProfile;
if (iccProfilePresent)
{
Assert.NotNull(iccProfile);
Assert.NotEmpty(iccProfile.Entries);
}
else
{
Assert.Null(iccProfile);
}
});
}
private static void TestImageInfo(string imagePath, IImageDecoder decoder, bool useIdentify, Action <IImageInfo> test)
{
var testFile = TestFile.Create(imagePath);
using (var stream = new MemoryStream(testFile.Bytes, false))
{
IImageInfo imageInfo = useIdentify
? ((IImageInfoDetector)decoder).Identify(Configuration.Default, stream)
: decoder.Decode <Rgba32>(Configuration.Default, stream);
test(imageInfo);
}
}
public void Load(Stream stream, IImageDecoder decoder)
{
try
{
if (!stream.CanRead)
{
throw new NotSupportedException("Cannot read from the stream.");
}
if (!stream.CanSeek)
{
throw new NotSupportedException("The stream does not support seeking.");
}
int maxHeaderSize = decoder.HeaderSize;
byte[] header = new byte[maxHeaderSize];
stream.Read(header, 0, maxHeaderSize);
stream.Position = 0;
//var decoder = FindFirstSupport(decoders, header); //decoders.FirstOrDefault(x => x.IsSupportedFileFormat(header));
if (decoder != null)
{
decoder.Decode(this, stream);
}
//if (IsLoading)
//{
// IsLoading = false;
// StringBuilder stringBuilder = new StringBuilder();
// stringBuilder.AppendLine("Image cannot be loaded. Available decoders:");
// foreach (IImageDecoder decoder in decoders)
// {
// stringBuilder.AppendLine("-" + decoder);
// }
// throw new UnsupportedImageFormatException(stringBuilder.ToString());
//}
}
finally
{
stream.Dispose();
}
}
private static ImageProperty[] GetAllPropertiesInternal(IImageDecoder decoder)
{
uint num;
uint num2;
if (decoder == null)
{
throw new ArgumentNullException();
}
List<ImageProperty> list = new List<ImageProperty>(ImageUtils.GetAllTags(decoder).Length);
decoder.GetPropertySize(out num, out num2);
// Если драйвер возвращает заведомо мало информации, то значит она битая и вытащить
// оттуда всё равно ничего не вытащить. Число 30 взято исходя из опытных расчётов.
// Выходим из процедуры, иначе вывалится ошибка COM.
if (num < num2 * 30)
return list.ToArray();
IntPtr pItems = Marshal.AllocHGlobal((int)num);
PropertyItem[] itemArray = new PropertyItem[num2];
decoder.GetAllPropertyItems(num, num2, pItems);
IntPtr ptr = pItems;
for (uint i = 0; i < num2; i++)
{
itemArray[i] = (PropertyItem)Marshal.PtrToStructure(ptr, typeof(PropertyItem));
ptr = (IntPtr)(ptr.ToInt32() + Marshal.SizeOf(typeof(PropertyItem)));
}
foreach (PropertyItem item in itemArray)
{
list.Add(ImageUtils.LoadProperty(item));
}
Marshal.FreeHGlobal(pItems);
return list.ToArray();
}
/// <summary>
/// Register image decoder for a specified file extension.
/// </summary>
///
/// <param name="fileExtension">File extension to register decoder for ("bmp", for example).</param>
/// <param name="decoder">Image decoder to use for the specified file extension.</param>
///
/// <remarks><para>The method allows to register image decoder object, which should be used
/// to decode images from files with the specified extension.</para></remarks>
///
public static void RegisterDecoder( string fileExtension, IImageDecoder decoder )
{
System.Diagnostics.Debug.WriteLine( "Registering decoder: " + fileExtension );
decoders.Add( fileExtension.ToLower( ), decoder );
}
//Handles encoding/decoding using the correct method and settings when the 'Proceed' button is pressed.
private void _encodeOrDecodeImage() {
if (rdioEncode.Checked) {
if (picResult.Image != null) {
picResult.Image.Dispose();
}
byte[] msg = _getMessageFromTextboxOrFile();
//Create an _imageEncoder according according to selected method
if (!OptionsForm.LSBMethodSelected) {
lblProcessing.Text = "Encoding using GT method...";
lblProcessing.Visible = true;
Application.DoEvents();
//Use simple constructor if a table is null
if (OptionsForm.QuantizationTableY == null || OptionsForm.QuantizationTableChr == null || OptionsForm.HuffmanTableYAC == null || OptionsForm.HuffmanTableYDC == null || OptionsForm.HuffmanTableChrAC == null || OptionsForm.HuffmanTableChrDC == null) {
_imageEncoder = new JpegImage(CoverImage, OptionsForm.Quality, OptionsForm.MValue);
} else {
_imageEncoder = new JpegImage(CoverImage, OptionsForm.Quality, OptionsForm.MValue, OptionsForm.QuantizationTableY, OptionsForm.QuantizationTableChr, OptionsForm.HuffmanTableYDC, OptionsForm.HuffmanTableYAC, OptionsForm.HuffmanTableChrDC, OptionsForm.HuffmanTableChrAC);
}
} else {
lblProcessing.Text = "Encoding using LSB method...";
lblProcessing.Visible = true;
Application.DoEvents();
_imageEncoder = new LeastSignificantBitImage(CoverImage);
}
//Encode
try {
_imageEncoder.Encode(msg);
_imageEncoder.Save(_userSavePath);
picResult.Image = Image.FromFile(_userSavePath);
}
catch (ImageCannotContainDataException) {
MessageBox.Show("Image cannot contain data!");
}
catch (ExternalException) {
MessageBox.Show("Failed to load result picture! Your Huffman table may be invalid");
}
catch (Exception) {
MessageBox.Show("An error occured when encoding!");
}
} else if (rdioDecode.Checked) {
picResult.Image = null;
tbMessage.Text = "";
if (!OptionsForm.LSBMethodSelected) {
lblProcessing.Text = "Decoding using GT method...";
lblProcessing.Visible = true;
Application.DoEvents();
_imageDecoder = new JPEGDecoder(_decodeFilePath);
} else {
lblProcessing.Text = "Decoding using LSB method...";
lblProcessing.Visible = true;
Application.DoEvents();
_imageDecoder = new LeastSignificantBitDecoder(_decodeFilePath);
}
//Decode
try {
byte[] message = _imageDecoder.Decode();
tbMessage.Text = new string(message.Select(x => (char)x).ToArray());
File.WriteAllBytes(_userSavePath, message);
}
catch (Exception) {
MessageBox.Show("An Error occured when decoding! Cover image might not contain a message.");
}
}
}
