private static void CheckExtension(ApplicationExtension ext)
{
// Check application identifier / authentication code
Assert.AreEqual("BIGPANTS", ext.ApplicationIdentifier);
Assert.AreEqual("1.3", ext.ApplicationAuthenticationCode);
Assert.AreEqual(ErrorState.Ok, ext.ConsolidatedState);
// Check number of blocks in application data
Assert.AreEqual(3, ext.ApplicationData.Count);
// Check application data block 1
Assert.AreEqual(5, ext.ApplicationData[0].DeclaredBlockSize);
Assert.AreEqual(5, ext.ApplicationData[0].ActualBlockSize);
Assert.AreEqual((byte)'H', ext.ApplicationData[0][0]);
Assert.AreEqual((byte)'E', ext.ApplicationData[0][1]);
Assert.AreEqual((byte)'L', ext.ApplicationData[0][2]);
Assert.AreEqual((byte)'L', ext.ApplicationData[0][3]);
Assert.AreEqual((byte)'O', ext.ApplicationData[0][4]);
Assert.AreEqual(ErrorState.Ok, ext.ApplicationData[0].ConsolidatedState);
// Check application data block 2
Assert.AreEqual(5, ext.ApplicationData[1].DeclaredBlockSize);
Assert.AreEqual(5, ext.ApplicationData[1].ActualBlockSize);
Assert.AreEqual((byte)'W', ext.ApplicationData[1][0]);
Assert.AreEqual((byte)'O', ext.ApplicationData[1][1]);
Assert.AreEqual((byte)'R', ext.ApplicationData[1][2]);
Assert.AreEqual((byte)'L', ext.ApplicationData[1][3]);
Assert.AreEqual((byte)'D', ext.ApplicationData[1][4]);
Assert.AreEqual(ErrorState.Ok, ext.ApplicationData[1].ConsolidatedState);
}
private void ConstructorStreamTest(bool xmlDebugging)
{
Stream s = new MemoryStream();
WriteApplicationIdentifier(s);
WriteHello(s);
WriteWorld(s);
WriteBlockTerminator(s);
s.Seek(0, SeekOrigin.Begin); // point to beginning of stream
_ext = new ApplicationExtension(s, xmlDebugging);
CheckExtension(_ext);
// Check block terminator
Assert.AreEqual(0, _ext.ApplicationData[2].DeclaredBlockSize);
Assert.AreEqual(0, _ext.ApplicationData[2].ActualBlockSize);
Assert.AreEqual(ErrorState.Ok,
_ext.ApplicationData[2].ConsolidatedState);
if (xmlDebugging)
{
Assert.AreEqual(ExpectedDebugXml, _ext.DebugXml);
}
}
public void ConstructorIdentificationBlockTooLongTest()
{
ReportStart();
byte[] identification = new byte[]
{
(byte)'N',
(byte)'E',
(byte)'T',
(byte)'S',
(byte)'C',
(byte)'A',
(byte)'P',
(byte)'E',
(byte)'2',
(byte)'.',
(byte)'0',
(byte)'1',
};
DataBlock identificationBlock = new DataBlock(11, identification);
DataBlock data = new DataBlock(1, new byte[] { 1 });
Collection <DataBlock> applicationData = new Collection <DataBlock>();
applicationData.Add(data);
_ext = new ApplicationExtension(identificationBlock, applicationData);
Assert.AreEqual("NETSCAPE", _ext.ApplicationIdentifier);
Assert.AreEqual("2.0", _ext.ApplicationAuthenticationCode);
Assert.AreEqual(identificationBlock, _ext.IdentificationBlock);
Assert.AreEqual(applicationData, _ext.ApplicationData);
Assert.AreEqual(ErrorState.IdentificationBlockTooLong, _ext.ErrorState);
ReportEnd();
}
private static void CheckNetscapeExtension(Stream s, int loopCount)
{
// check netscape extension
ApplicationExtension ae = new ApplicationExtension(s);
Assert.AreEqual(ErrorState.Ok, ae.ConsolidatedState);
NetscapeExtension ne = new NetscapeExtension(ae);
Assert.AreEqual(ErrorState.Ok, ne.ConsolidatedState);
Assert.AreEqual(loopCount, ne.LoopCount);
}
public void StartGif()
{
Width = (ushort)(Frames[0].Texture.width);
Height = (ushort)(Frames[0].Texture.height);
globalColorTable = new List <Color>();
applicationExtension = new ApplicationExtension();
// byteList = new List<byte>();
encoded = new Dictionary <int, List <byte> >();
colorTables = new List <Color> [Frames.Count];
distinctColors = new Dictionary <int, List <Color> >();
currentStep++;
}
// This method gets called by the runtime. Use this method to add services to the container.
public void ConfigureServices(IServiceCollection services)
{
//services.AddDbContext<TestDBContext>(options =>
// options.UseSqlServer(Configuration.GetConnectionString("TestDBConnection")));
//services.AddDatabaseDeveloperPageExceptionFilter();
services.AddControllersWithViews();
// In production, the Angular files will be served from this directory
services.AddSpaStaticFiles(configuration =>
{
configuration.RootPath = "ClientApp/dist";
});
ApplicationExtension.RegisterApplicationDependencies(services, this.Configuration);
}
public void WriteToStreamTest()
{
ReportStart();
byte[] identificationData = new byte[]
{
(byte)'B', (byte)'I', (byte)'G', (byte)'P',
(byte)'A', (byte)'N', (byte)'T', (byte)'S',
(byte)'1', (byte)'.', (byte)'3'
};
DataBlock identificationBlock = new DataBlock(11, identificationData);
byte[] helloData = new byte[]
{
(byte)'H', (byte)'E', (byte)'L', (byte)'L', (byte)'O'
};
DataBlock helloBlock = new DataBlock(5, helloData);
byte[] worldData = new byte[]
{
(byte)'W', (byte)'O', (byte)'R', (byte)'L', (byte)'D'
};
DataBlock worldBlock = new DataBlock(5, worldData);
DataBlock blockTerminator = new DataBlock(0, new byte[] { 0 });
Collection <DataBlock> applicationData = new Collection <DataBlock>();
applicationData.Add(helloBlock);
applicationData.Add(worldBlock);
applicationData.Add(blockTerminator);
_ext = new ApplicationExtension(identificationBlock, applicationData);
MemoryStream s = new MemoryStream();
_ext.WriteToStream(s);
s.Seek(0, SeekOrigin.Begin);
ApplicationExtension e = new ApplicationExtension(s);
CheckExtension(e);
ReportEnd();
}
public override void ShowDialog(PropertyItemValue propertyValue, IInputElement commandSource)
{
if (propertyValue == null)
{
return;
}
if (propertyValue.ParentProperty.IsReadOnly)
{
return;
}
OpenFileDialog openFileDialog = new OpenFileDialog();
openFileDialog.AllowMultiple = false;
openFileDialog.Filters = new List <FileDialogFilter>
{
new FileDialogFilter()
{
Name = "Image Files (*.jpg, *.png, *.bmp)"
, Extensions = new List <string>()
{
"jpg", "png", "bmp"
}
}
};
var mainWindow = ApplicationExtension.GetMainWindow();
openFileDialog.ShowAsync(mainWindow).ContinueWith(x =>
{
if (x.IsFaulted == false)
{
string result = x.Result.FirstOrDefault();
if (string.IsNullOrEmpty(result) == false)
{
propertyValue.StringValue = result;
}
}
}, TaskScheduler.FromCurrentSynchronizationContext());
}
public FileBrowserDialogPropertyValueEditor()
{
//little ugly search for the resource
var mainWindow = ApplicationExtension.GetMainWindow();
if (mainWindow != null)
{
object res = null;
foreach (var item in mainWindow.FindChildren <UserControl>(true))
{
if (item.TryFindResource(LocalResources.FileBrowserEditorKey, out res))
{
break;
}
}
InlineTemplate = res;
}
}
public override void ShowDialog(PropertyItemValue propertyValue, IInputElement commandSource)
{
if (propertyValue == null)
{
return;
}
if (propertyValue.ParentProperty.IsReadOnly)
{
return;
}
OpenFileDialog openFileDialog = new OpenFileDialog();
openFileDialog.AllowMultiple = false;
var property = propertyValue.ParentProperty;
if (property != null)
{
var optionsAttribute = (OpenFileDialogOptionsAttribute)property.Attributes[typeof(OpenFileDialogOptionsAttribute)];
if (optionsAttribute != null)
{
optionsAttribute.ConfigureDialog(openFileDialog);
}
}
var mainWindow = ApplicationExtension.GetMainWindow();
openFileDialog.ShowAsync(mainWindow).ContinueWith(x =>
{
if (x.IsFaulted == false)
{
string result = x.Result.FirstOrDefault();
if (string.IsNullOrEmpty(result) == false)
{
propertyValue.StringValue = result;
}
}
}, TaskScheduler.FromCurrentSynchronizationContext());
}
/// <summary>
/// Populates the application extension byte[] from the source image, and performs lexical parsing on the array.
/// </summary>
/// <param name="bytes"></param>
public static ApplicationExtension ParseApplicationExtension(byte[] bytes)
{
ApplicationExtension ae = new ApplicationExtension()
{
Bytes = (byte[])bytes.Clone(),
TotalBlockLength = bytes.Length,
ExtensionIntroducer = bytes[0],
ExtensionLabel = bytes[1],
MainBlockSize = bytes[2],
MainBlock = new byte[bytes[2]]
};
Array.Copy(bytes, 3, ae.MainBlock, 0, ae.MainBlockSize);
ae.SubBlockSize = ae.Bytes[ae.MainBlockSize + 3];
if (ae.IsNetscapeExtension())
{
ae.SubBlock = new byte[ae.SubBlockSize];
Array.Copy(bytes, ae.MainBlockSize + 3, ae.SubBlock, 0, ae.SubBlockSize);
}
else if (ae.IsXmpDataExtension())
{
int blockTerminatorIndex = ApplicationExtension.GetXmpExtensionBlockTerminatorIndex(bytes).Value;
// todo: offer propert support for XMP Data extensions
// ae.SubBlockSize = blockTerminatorIndex - (ae.MainBlock.Length + 3);
// ae.SubBlock = new byte[ae.SubBlockSize];
// Array.Copy(bytes, ae.SubBlock, ae.SubBlockSize);
// ae.TotalBlockLength = ApplicationExtension.MainBlockSize + ApplicationExtension.SubBlockSize + 4;
}
if (bytes[ae.TotalBlockLength - 1] != (byte)Global.BlockTerminator)
{
throw new ApplicationExtensionParserException();
}
else
{
return(ae);
}
}
private void ConstructorStreamTestNoBlockTerminator(bool xmlDebugging)
{
Stream s = new MemoryStream();
WriteApplicationIdentifier(s);
WriteHello(s);
WriteWorld(s);
// Don't write a block terminator - that's the point of this test
s.Seek(0, SeekOrigin.Begin); // point to start of stream
// Instantiate the ApplicationExtension
_ext = new ApplicationExtension(s, xmlDebugging);
Assert.AreEqual(ErrorState.EndOfInputStream, _ext.ConsolidatedState);
if (xmlDebugging)
{
Assert.AreEqual(ExpectedDebugXml, _ext.DebugXml);
}
}
public void ConstructorTest()
{
byte[] idData = new byte[]
{
(byte)'N',
(byte)'E',
(byte)'T',
(byte)'S',
(byte)'C',
(byte)'A',
(byte)'P',
(byte)'E',
(byte)'2',
(byte)'.',
(byte)'0',
};
DataBlock idBlock = new DataBlock(11, idData);
Collection <DataBlock> appData = new Collection <DataBlock>();
// First byte in the data block is always 1 for a netscape extension
// Second and third bytes are the loop count, lsb first
byte[] loopCount = new byte[] { 1, 4, 0 };
appData.Add(new DataBlock(3, loopCount));
// Add the block terminator
appData.Add(new DataBlock(0, new byte[0]));
ApplicationExtension appExt
= new ApplicationExtension(idBlock, appData);
_ne = new NetscapeExtension(appExt);
Assert.AreEqual(4, _ne.LoopCount);
Assert.AreEqual("NETSCAPE", _ne.ApplicationIdentifier);
Assert.AreEqual("2.0", _ne.ApplicationAuthenticationCode);
Assert.AreEqual(ErrorState.Ok, _ne.ConsolidatedState);
}
public void ConstructorIdentificationBlockTooShortTest()
{
ReportStart();
byte[] identification = new byte[]
{
(byte)'N',
(byte)'E',
(byte)'T',
(byte)'S',
(byte)'C',
(byte)'A',
(byte)'P',
(byte)'E',
(byte)'2',
(byte)'.',
};
DataBlock identificationBlock = new DataBlock(11, identification);
DataBlock data = new DataBlock(1, new byte[] { 1 });
Collection <DataBlock> applicationData = new Collection <DataBlock>();
applicationData.Add(data);
try
{
_ext = new ApplicationExtension(identificationBlock,
applicationData);
}
catch (ArgumentException ex)
{
string message
= "The identification block should be 11 bytes long but "
+ "is only 10 bytes.";
StringAssert.Contains(message, ex.Message);
ReportEnd();
throw;
}
}
public void ConstructorTestNotNetscape()
{
byte[] idData = new byte[]
{
(byte)'B',
(byte)'I',
(byte)'G',
(byte)'P',
(byte)'A',
(byte)'N',
(byte)'T',
(byte)'S',
(byte)'2',
(byte)'.',
(byte)'0',
};
DataBlock idBlock = new DataBlock(11, idData);
ApplicationExtension appExt
= new ApplicationExtension(idBlock, new Collection <DataBlock>());
try
{
_ne = new NetscapeExtension(appExt);
}
catch (ArgumentException ex)
{
string message
= "The application identifier is not 'NETSCAPE' "
+ "therefore this application extension is not a "
+ "Netscape extension. Application identifier: BIGPANTS";
StringAssert.Contains(message, ex.Message);
Assert.AreEqual("applicationExtension", ex.ParamName);
throw;
}
}
public void ConstructorTestNot2Point0()
{
byte[] idData = new byte[]
{
(byte)'N',
(byte)'E',
(byte)'T',
(byte)'S',
(byte)'C',
(byte)'A',
(byte)'P',
(byte)'E',
(byte)'3',
(byte)'.',
(byte)'0',
};
DataBlock idBlock = new DataBlock(11, idData);
ApplicationExtension appExt
= new ApplicationExtension(idBlock, new Collection <DataBlock>());
try
{
_ne = new NetscapeExtension(appExt);
}
catch (ArgumentException ex)
{
string message
= "The application authentication code is not '2.0' "
+ "therefore this application extension is not a "
+ "Netscape extension. Application authentication code: 3.0";
StringAssert.Contains(message, ex.Message);
Assert.AreEqual("applicationExtension", ex.ParamName);
throw;
}
}
/// <summary>
/// Main file parser. Reads GIF content blocks.
/// </summary>
/// <param name="inputStream">
/// Input stream from which the GIF data is to be read.
/// </param>
private void ReadContents(Stream inputStream)
{
// read GIF file content blocks
bool done = false;
GraphicControlExtension lastGce = null;
string message; // for error conditions
while (!done && ConsolidatedState == ErrorState.Ok)
{
int code = Read(inputStream);
MyProgressCounters[_readStreamCounterText].Value
= (int)inputStream.Position;
WriteCodeToDebugXml(code);
switch (code)
{
case CodeImageSeparator:
WriteDebugXmlComment("0x2C - image separator");
AddFrame(inputStream, lastGce);
MyProgressCounters[_readStreamCounterText].Value
= (int)inputStream.Position;
break;
case CodeExtensionIntroducer:
WriteDebugXmlComment("0x21 - extension introducer");
code = Read(inputStream);
MyProgressCounters[_readStreamCounterText].Value
= (int)inputStream.Position;
WriteCodeToDebugXml(code);
switch (code)
{
case CodePlaintextLabel:
// FEATURE: handle plain text extension
WriteDebugXmlComment("0x01 - plain text extension");
SkipBlocks(inputStream);
MyProgressCounters[_readStreamCounterText].Value
= (int)inputStream.Position;
break;
case CodeGraphicControlLabel:
WriteDebugXmlComment("0xF9 - graphic control label");
lastGce = new GraphicControlExtension(inputStream,
XmlDebugging);
MyProgressCounters[_readStreamCounterText].Value
= (int)inputStream.Position;
WriteDebugXmlNode(lastGce.DebugXmlReader);
break;
case CodeCommentLabel:
// FEATURE: handle comment extension
WriteDebugXmlComment("0xFE - comment extension");
SkipBlocks(inputStream);
MyProgressCounters[_readStreamCounterText].Value
= (int)inputStream.Position;
break;
case CodeApplicationExtensionLabel:
WriteDebugXmlComment("0xFF - application extension label");
ApplicationExtension ext
= new ApplicationExtension(inputStream,
XmlDebugging);
MyProgressCounters[_readStreamCounterText].Value
= (int)inputStream.Position;
WriteDebugXmlNode(ext.DebugXmlReader);
if (ext.ApplicationIdentifier == "NETSCAPE" &&
ext.ApplicationAuthenticationCode == "2.0")
{
_netscapeExtension = new NetscapeExtension(ext);
}
else
{
// TESTME: ReadContents - non-Netscape application extension
_applicationExtensions.Add(ext);
}
break;
default: // uninteresting extension
// TESTME: ReadContents - uninteresting extension
WriteDebugXmlComment("Ignoring this extension");
SkipBlocks(inputStream);
MyProgressCounters[_readStreamCounterText].Value
= (int)inputStream.Position;
break;
}
break;
case CodeTrailer:
// We've reached an explicit end-of-data marker, so stop
// processing the stream.
WriteDebugXmlComment("0x3B - end of data");
done = true;
break;
case 0x00: // bad byte, but keep going and see what happens
WriteDebugXmlComment("0x00 - unexpected code");
message
= "Unexpected block terminator encountered at "
+ "position " + inputStream.Position
+ " after reading " + _frames.Count + " frames.";
SetStatus(ErrorState.UnexpectedBlockTerminator,
message);
break;
case -1: // reached the end of the input stream
WriteDebugXmlComment("-1 - end of input stream");
message
= "Reached the end of the input stream without "
+ "encountering trailer 0x3b";
SetStatus(ErrorState.EndOfInputStream, message);
break;
default:
WriteDebugXmlComment("Not a recognised code");
message
= "Bad data block introducer: 0x"
+ code.ToString("X", CultureInfo.InvariantCulture).PadLeft(2, '0')
+ " (" + code + ") at position " + inputStream.Position
+ " ("
+ inputStream.Position.ToString("X",
CultureInfo.InvariantCulture)
+ " hex) after reading "
+ _frames.Count + " frames.";
SetStatus(ErrorState.BadDataBlockIntroducer, message);
break;
}
}
}
/// <summary>
/// Encode GIF in multiple threads.
/// </summary>
public void EncodeParallel(Action <EncodeProgress> onProgress, int scale = 1) // TODO: Refact.
{
if (_free)
{
throw new Exception("The Free version doesn't support this feature. Please consider buying the Full version of Power GIF.");
}
const string header = "GIF89a";
var width = (ushort)(Frames[0].Texture.width * scale);
var height = (ushort)(Frames[0].Texture.height * scale);
var globalColorTable = new List <Color32>();
var applicationExtension = new ApplicationExtension();
var encoded = new Dictionary <int, List <byte> >();
var encodeProgress = new EncodeProgress {
FrameCount = Frames.Count
};
var colorTables = new List <Color32> [Frames.Count];
var distinctColors = new Dictionary <int, List <Color32> >();
var manualResetEvent = new ManualResetEvent(false);
for (var i = 0; i < Frames.Count; i++)
{
var frame = Frames[i];
ThreadPool.QueueUserWorkItem(context =>
{
var distinct = frame.Texture.GetPixels32().Distinct().ToList();
lock (distinctColors)
{
distinctColors.Add((int)context, distinct);
if (distinctColors.Count == Frames.Count)
{
manualResetEvent.Set();
}
}
}, i);
}
manualResetEvent.WaitOne();
for (var i = 0; i < Frames.Count; i++)
{
var colors = distinctColors[i];
var add = colors.Where(j => !globalColorTable.Contains(j)).ToList();
if (globalColorTable.Count + add.Count <= 256)
{
globalColorTable.AddRange(add);
colorTables[i] = globalColorTable;
}
else if (colors.Count <= 256) // Introduce local color table.
{
colorTables[i] = colors;
}
else
{
onProgress(new EncodeProgress {
Completed = true, Exception = new Exception($"Frame #{i} contains more than 256 colors!")
});
return;
}
}
ReplaceTransparentColor(ref globalColorTable);
for (var i = 0; i < Frames.Count; i++) // Don't use Parallel.For to leave .NET compatibility.
{
ThreadPool.QueueUserWorkItem(context =>
{
var index = (int)context;
var colorTable = colorTables[index];
var localColorTableFlag = (byte)(colorTable == globalColorTable ? 0 : 1);
var localColorTableSize = GetColorTableSize(colorTable);
byte transparentColorFlag = 0, transparentColorIndex = 0;
byte max;
var colorIndexes = GetColorIndexes(Frames[index].Texture, scale, colorTable, localColorTableFlag, ref transparentColorFlag, ref transparentColorIndex, out max);
var graphicControlExtension = new GraphicControlExtension(4, 0, (byte)Frames[index].DisposalMethod, 0, transparentColorFlag, (ushort)(100 * Frames[index].Delay), transparentColorIndex);
var imageDescriptor = new ImageDescriptor(0, 0, width, height, localColorTableFlag, 0, 0, 0, localColorTableSize);
var minCodeSize = LzwEncoder.GetMinCodeSize(max);
var lzw = LzwEncoder.Encode(colorIndexes, minCodeSize);
var tableBasedImageData = new TableBasedImageData(minCodeSize, lzw);
var bytes = new List <byte>();
bytes.AddRange(graphicControlExtension.GetBytes());
bytes.AddRange(imageDescriptor.GetBytes());
if (localColorTableFlag == 1)
{
bytes.AddRange(ColorTableToBytes(colorTable, localColorTableSize));
}
bytes.AddRange(tableBasedImageData.GetBytes());
lock (encoded)
{
encoded.Add(index, bytes);
encodeProgress.Progress++;
if (encoded.Count == Frames.Count)
{
var globalColorTableSize = GetColorTableSize(globalColorTable);
var logicalScreenDescriptor = new LogicalScreenDescriptor(width, height, 1, 7, 0, globalColorTableSize, 0, 0);
var binary = new List <byte>();
binary.AddRange(Encoding.UTF8.GetBytes(header));
binary.AddRange(logicalScreenDescriptor.GetBytes());
binary.AddRange(ColorTableToBytes(globalColorTable, globalColorTableSize));
binary.AddRange(applicationExtension.GetBytes());
binary.AddRange(encoded.OrderBy(j => j.Key).SelectMany(j => j.Value));
binary.Add(0x3B); // GIF Trailer.
encodeProgress.Bytes = binary.ToArray();
encodeProgress.Completed = true;
}
onProgress(encodeProgress);
}
}, i);
}
}
/// <summary>
/// Iterator can be used for large GIF-files in order to display progress bar.
/// </summary>
public IEnumerable <List <byte> > EncodeIterator(int scale = 1)
{
if (_free)
{
if (Frames[0].Texture.width > 256 || Frames[0].Texture.height > 256)
{
throw new Exception("The free version has maximum supported size 256x256 px. Please consider buying the Full version of Power GIF.");
}
if (Frames.Count > 20)
{
throw new Exception("The Free version is limited by 20 frames. Please consider buying the Full version of Power GIF.");
}
}
const string header = "GIF89a";
var width = (ushort)(Frames[0].Texture.width * scale);
var height = (ushort)(Frames[0].Texture.height * scale);
var globalColorTable = new List <Color32>();
var applicationExtension = new ApplicationExtension();
var bytes = new List <byte>();
var colorTables = new List <Color32> [Frames.Count];
var distinctColors = new Dictionary <int, List <Color32> >();
var manualResetEvent = new ManualResetEvent(false);
for (var i = 0; i < Frames.Count; i++)
{
var frame = Frames[i];
ThreadPool.QueueUserWorkItem(context =>
{
var distinct = frame.Texture.GetPixels32().Distinct().ToList();
lock (distinctColors)
{
distinctColors.Add((int)context, distinct);
if (distinctColors.Count == Frames.Count)
{
manualResetEvent.Set();
}
}
}, i);
}
manualResetEvent.WaitOne();
for (var i = 0; i < Frames.Count; i++)
{
var colors = distinctColors[i];
var add = colors.Where(j => !globalColorTable.Contains(j)).ToList();
if (globalColorTable.Count + add.Count <= 256)
{
globalColorTable.AddRange(add);
colorTables[i] = globalColorTable;
}
else if (add.Count <= 256) // Introducing local color table
{
colorTables[i] = colors;
}
else
{
throw new Exception($"Frame #{i} contains more than 256 colors!");
}
}
ReplaceTransparentColor(ref globalColorTable);
for (var i = 0; i < Frames.Count; i++)
{
var frame = Frames[i];
var colorTable = colorTables[i];
var localColorTableFlag = (byte)(colorTable == globalColorTable ? 0 : 1);
var localColorTableSize = GetColorTableSize(colorTable);
byte transparentColorFlag = 0, transparentColorIndex = 0;
byte max;
var colorIndexes = GetColorIndexes(frame.Texture, scale, colorTable, localColorTableFlag, ref transparentColorFlag, ref transparentColorIndex, out max);
var graphicControlExtension = new GraphicControlExtension(4, 0, (byte)frame.DisposalMethod, 0, transparentColorFlag, (ushort)(100 * frame.Delay), transparentColorIndex);
var imageDescriptor = new ImageDescriptor(0, 0, width, height, localColorTableFlag, 0, 0, 0, localColorTableSize);
var minCodeSize = LzwEncoder.GetMinCodeSize(max);
var lzw = LzwEncoder.Encode(colorIndexes, minCodeSize);
var tableBasedImageData = new TableBasedImageData(minCodeSize, lzw);
bytes.Clear();
bytes.AddRange(graphicControlExtension.GetBytes());
bytes.AddRange(imageDescriptor.GetBytes());
if (localColorTableFlag == 1)
{
bytes.AddRange(ColorTableToBytes(colorTable, localColorTableSize));
}
bytes.AddRange(tableBasedImageData.GetBytes());
yield return(bytes);
}
yield return(new List <byte> {
0x3B
}); // GIF Trailer.
// Then output GIF header as last iterator element! This way we can build global color table "on fly" instead of expensive building operation.
var globalColorTableSize = GetColorTableSize(globalColorTable);
var logicalScreenDescriptor = new LogicalScreenDescriptor(width, height, 1, 7, 0, globalColorTableSize, 0, 0);
bytes.Clear();
bytes.AddRange(Encoding.UTF8.GetBytes(header));
bytes.AddRange(logicalScreenDescriptor.GetBytes());
bytes.AddRange(ColorTableToBytes(globalColorTable, globalColorTableSize));
bytes.AddRange(applicationExtension.GetBytes());
yield return(bytes);
}
/// <summary>
/// Compiles the parsed tokens/components back into a byte array.
/// </summary>
public void CompileByteArray()
{
List <byte> output = new List <byte>();
output.AddRange(DataStream.Header.Bytes);
output.AddRange(DataStream.LogicalScreen.LogicalScreenDescriptor.Bytes);
if (DataStream.LogicalScreen.GlobalColorTable != null)
{
output.AddRange(DataStream.LogicalScreen.GlobalColorTable.Bytes);
}
foreach (DataBlock db in DataStream.DataBlocks)
{
if (db is GraphicBlock)
{
GraphicBlock gb = (GraphicBlock)db;
if (gb.GraphicControlExtension != null)
{
output.AddRange(gb.GraphicControlExtension.Bytes);
}
if (gb.GraphicRenderingBlock is PlainTextExtension)
{
PlainTextExtension pte = (PlainTextExtension)gb.GraphicRenderingBlock;
output.AddRange(pte.Bytes);
}
else if (gb.GraphicRenderingBlock is TableBasedImage)
{
TableBasedImage tbi = (TableBasedImage)gb.GraphicRenderingBlock;
output.AddRange(tbi.ImageDescriptor.Bytes);
if (tbi.LocalColorTable != null)
{
output.AddRange(tbi.LocalColorTable.Bytes);
}
output.AddRange(tbi.ImageData.Bytes);
}
}
else if (db is SpecialPurposeBlock)
{
SpecialPurposeBlock spb = (SpecialPurposeBlock)db;
if (spb is ApplicationExtension)
{
ApplicationExtension ae = (ApplicationExtension)spb;
output.AddRange(ae.Bytes);
}
else if (spb is CommentExtension)
{
CommentExtension ce = (CommentExtension)spb;
output.AddRange(ce.Bytes);
}
}
}
output.AddRange(DataStream.Trailer.Bytes);
DataStream.Bytes = output.ToArray();
}
public void WikipediaExampleTest()
{
ReportStart();
_e = new AnimatedGifEncoder();
GifFrame frame = new GifFrame(WikipediaExample.ExpectedBitmap);
frame.Delay = WikipediaExample.DelayTime;
_e.AddFrame(frame);
// TODO: some way of creating/testing a UseLocal version of WikipediaExample
string fileName = "WikipediaExampleUseGlobal.gif";
_e.WriteToFile(fileName);
Stream s = File.OpenRead(fileName);
int code;
// check GIF header
GifHeader gh = new GifHeader(s);
Assert.AreEqual(ErrorState.Ok, gh.ConsolidatedState);
// check logical screen descriptor
LogicalScreenDescriptor lsd = new LogicalScreenDescriptor(s);
Assert.AreEqual(ErrorState.Ok, lsd.ConsolidatedState);
WikipediaExample.CheckLogicalScreenDescriptor(lsd);
// read global colour table
ColourTable gct
= new ColourTable(s, WikipediaExample.GlobalColourTableSize);
Assert.AreEqual(ErrorState.Ok, gct.ConsolidatedState);
// cannot compare global colour table as different encoders will
// produce difference colour tables.
// WikipediaExample.CheckGlobalColourTable( gct );
// check for extension introducer
code = ExampleComponent.CallRead(s);
Assert.AreEqual(GifComponent.CodeExtensionIntroducer, code);
// check for app extension label
code = ExampleComponent.CallRead(s);
Assert.AreEqual(GifComponent.CodeApplicationExtensionLabel, code);
// check netscape extension
ApplicationExtension ae = new ApplicationExtension(s);
Assert.AreEqual(ErrorState.Ok, ae.ConsolidatedState);
NetscapeExtension ne = new NetscapeExtension(ae);
Assert.AreEqual(ErrorState.Ok, ne.ConsolidatedState);
Assert.AreEqual(0, ne.LoopCount);
// check for extension introducer
code = ExampleComponent.CallRead(s);
Assert.AreEqual(GifComponent.CodeExtensionIntroducer, code);
// check for gce label
code = ExampleComponent.CallRead(s);
Assert.AreEqual(GifComponent.CodeGraphicControlLabel, code);
// check graphic control extension
GraphicControlExtension gce = new GraphicControlExtension(s);
Assert.AreEqual(ErrorState.Ok, gce.ConsolidatedState);
WikipediaExample.CheckGraphicControlExtension(gce);
// check for image separator
code = ExampleComponent.CallRead(s);
Assert.AreEqual(GifComponent.CodeImageSeparator, code);
// check for image descriptor
ImageDescriptor id = new ImageDescriptor(s);
Assert.AreEqual(ErrorState.Ok, id.ConsolidatedState);
WikipediaExample.CheckImageDescriptor(id);
// read, decode and check image data
// Cannot compare encoded LZW data directly as different encoders
// will create different colour tables, so even if the bitmaps are
// identical, the colour indices will be different
int pixelCount = WikipediaExample.FrameSize.Width
* WikipediaExample.FrameSize.Height;
TableBasedImageData tbid = new TableBasedImageData(s, pixelCount);
for (int y = 0; y < WikipediaExample.LogicalScreenSize.Height; y++)
{
for (int x = 0; x < WikipediaExample.LogicalScreenSize.Width; x++)
{
int i = (y * WikipediaExample.LogicalScreenSize.Width) + x;
Assert.AreEqual(WikipediaExample.ExpectedBitmap.GetPixel(x, y),
gct[tbid.Pixels[i]],
"X: " + x + ", Y: " + y);
}
}
// Check for block terminator after image data
code = ExampleComponent.CallRead(s);
Assert.AreEqual(0x00, code);
// check for GIF trailer
code = ExampleComponent.CallRead(s);
Assert.AreEqual(GifComponent.CodeTrailer, code);
// check we're at the end of the stream
code = ExampleComponent.CallRead(s);
Assert.AreEqual(-1, code);
s.Close();
_d = new GifDecoder(fileName);
_d.Decode();
Assert.AreEqual(ErrorState.Ok, _d.ConsolidatedState);
BitmapAssert.AreEqual(WikipediaExample.ExpectedBitmap,
(Bitmap)_d.Frames[0].TheImage,
"");
ReportEnd();
}
private static List <Block> ReadBlocks(byte[] bytes, ref int startIndex)
{
var blocks = new List <Block>();
var index = startIndex;
while (true)
{
switch (bytes[index])
{
case Block.ExtensionIntroducer:
{
Block extension;
switch (bytes[index + 1])
{
case Block.PlainTextExtensionLabel:
extension = new PlainTextExtension(bytes, ref index);
break;
case Block.GraphicControlExtensionLabel:
extension = new GraphicControlExtension(bytes, ref index);
break;
case Block.CommentExtensionLabel:
extension = new CommentExtension(bytes, ref index);
break;
case Block.ApplicationExtensionLabel:
extension = new ApplicationExtension(bytes, ref index);
break;
default:
throw new NotSupportedException("Unknown extension!");
}
blocks.Add(extension);
break;
}
case Block.ImageDescriptorLabel:
{
var descriptor = new ImageDescriptor(bytes, ref index);
blocks.Add(descriptor);
if (descriptor.LocalColorTableFlag == 1)
{
var localColorTable = new ColorTable(descriptor.LocalColorTableSize, bytes, ref index);
blocks.Add(localColorTable);
}
var data = new TableBasedImageData(bytes, ref index);
blocks.Add(data);
break;
}
case 0x3B: // End
{
return(blocks);
}
default:
throw new NotSupportedException($"Unsupported GIF block: {bytes[index]:X}.");
}
}
}
/// <summary>
/// Tokenizes the GIF image's byte[] into constituent components.
/// </summary>
public static DataStream ParseDataStream(byte[] data)
{
DataStream ds = new DataStream();
using (MemoryStream ms = new MemoryStream(data))
{
using (BinaryReader br = new BinaryReader(ms))
{
ds.Header = VcvjParser.ParseHeader(br.ReadBytes(Header.TotalBlockLength));
ds.LogicalScreen = new LogicalScreen()
{
LogicalScreenDescriptor = VcvjParser.ParseLogicalScreenDescriptor(br.ReadBytes(LogicalScreenDescriptor.TotalBlockLength))
};
if (ds.LogicalScreen.LogicalScreenDescriptor.HasGlobalColorTable)
{
ds.LogicalScreen.GlobalColorTable = VcvjParser.ParseGlobalColorTable(
br.ReadBytes(ds.LogicalScreen.LogicalScreenDescriptor.GlobalColorTableLength)
);
}
while (br.PeekChar() != -1)
{
long currentIndex = br.BaseStream.Position;
byte currentByte = data[currentIndex];
byte?nextByte = currentIndex + 1 < data.Length ? (byte?)data[currentIndex + 1] : (byte?)null;
if (ParserUtils.IsTrailerMarker(currentByte))
{
ds.Trailer = new Trailer(br.ReadByte());
continue;
}
else if (ParserUtils.IsApplicationExtensionBlock(currentByte, nextByte))
{
ApplicationExtension ae = VcvjParser.ParseApplicationExtension(
br.ReadBytes(VcvjParser.GetApplicationExtensionBlockLength(currentIndex, ref data))
);
ds.DataBlocks.Add(ae);
continue;
}
else if (ParserUtils.IsCommentExtensionBlock(currentByte, nextByte))
{
int totalBlockLength = data[currentIndex + 2] + 4;
CommentExtension ce = VcvjParser.ParseCommentExtension(br.ReadBytes(totalBlockLength));
ds.DataBlocks.Add(ce);
continue;
}
else
{
GraphicBlock gb = new GraphicBlock();
if (ParserUtils.IsGraphicControlExtensionBlock(currentByte, nextByte))
{
gb.GraphicControlExtension = VcvjParser.ParseGraphicControlExtension(
br.ReadBytes(8)
);
currentIndex = br.BaseStream.Position;
currentByte = data[currentIndex];
nextByte = data[currentIndex + 1];
}
if (ParserUtils.IsImageDescriptor(currentByte))
{
TableBasedImage tbi = new TableBasedImage()
{
ImageDescriptor = VcvjParser.ParseImageDescriptor(
br.ReadBytes(10)
)
};
if (tbi.ImageDescriptor.LocalColorTableFlag)
{
tbi.LocalColorTable = VcvjParser.ParseLocalColorTable(
br.ReadBytes(tbi.ImageDescriptor.LocalColorTableLength)
);
}
currentIndex = br.BaseStream.Position;
currentByte = data[currentIndex];
nextByte = data[currentIndex + 1];
tbi.ImageData = VcvjParser.ParseImageData(
br.ReadBytes(VcvjParser.GetImageDataBlockLength(currentIndex, ref data))
);
gb.GraphicRenderingBlock = tbi;
ds.DataBlocks.Add(gb);
continue;
}
else if (ParserUtils.IsPlaintextExtension(currentByte, nextByte))
{
//GraphicBlock gb = new GraphicBlock()
//{
//};
}
else if (ParserUtils.IsApplicationExtensionBlock(currentByte, nextByte))
{
ApplicationExtension ae = VcvjParser.ParseApplicationExtension(
br.ReadBytes(VcvjParser.GetApplicationExtensionBlockLength(currentIndex, ref data))
);
ds.DataBlocks.Add(ae);
continue;
}
else if (ParserUtils.IsCommentExtensionBlock(currentByte, nextByte))
{
int totalBlockLength = data[currentIndex + 2] + 4;
CommentExtension ce = VcvjParser.ParseCommentExtension(br.ReadBytes(totalBlockLength));
ds.DataBlocks.Add(ce);
continue;
}
else
{
throw new UnidentifiedBlockException(
string.Format(
"The current byte is {0} and the next one is {1}. Not really sure what to make of this.",
currentByte.ToString(),
String.IsNullOrEmpty(nextByte.ToString()) ? "null" : nextByte.ToString()
)
);
}
}
}
}
}
return(ds);
}
/// <summary>
/// Returns the length of the parsed data stream byte[].
/// </summary>
/// <returns></returns>
public int GetLength()
{
int length = 0;
length += Header.TotalBlockLength + LogicalScreenDescriptor.TotalBlockLength + Trailer.TotalBlockLength;
if (LogicalScreen.GlobalColorTable != null)
{
length += LogicalScreen.GlobalColorTable.TotalBlockLength;
}
foreach (DataBlock db in DataBlocks)
{
if (db is GraphicBlock)
{
GraphicBlock gb = (GraphicBlock)db;
if (gb.GraphicControlExtension != null)
{
length += GraphicControlExtension.TotalBlockLength;
}
if (gb.GraphicRenderingBlock is PlainTextExtension)
{
PlainTextExtension pte = (PlainTextExtension)gb.GraphicRenderingBlock;
length += pte.TotalBlockLength;
}
else if (gb.GraphicRenderingBlock is TableBasedImage)
{
TableBasedImage tbi = (TableBasedImage)gb.GraphicRenderingBlock;
length += tbi.ImageData.TotalBlockLength + ImageDescriptor.TotalBlockLength;
if (tbi.LocalColorTable != null)
{
length += tbi.LocalColorTable.TotalBlockLength;
}
}
}
else if (db is SpecialPurposeBlock)
{
SpecialPurposeBlock spb = (SpecialPurposeBlock)db;
if (spb is ApplicationExtension)
{
ApplicationExtension ae = (ApplicationExtension)spb;
length += ae.TotalBlockLength;
}
else if (spb is CommentExtension)
{
CommentExtension ce = (CommentExtension)spb;
length += ce.TotalBlockLength;
}
}
}
return(length);
}
