private static void GifBitmapFrameTest()
{
var _frame = new GifBitmapFrame(null);
_frame.DisposalMethod = GifFrameDisposalMethod.NotDispose;
_frame.UseTransparency = true;
// byte _flags = _frame.GetFlags();
//Console.WriteLine("{0:X2}", _flags);
Console.ReadLine();
}
public static GifBitmapCoder ConvertStciIndexedToGif(
StciIndexed aStci, UInt16 aDelay, bool aUseTransparent, int aForeshotingNumber)
{
var _stciPalette = aStci.Palette;
var _colors = new List <Color>(StciIndexed.NUMBER_OF_COLORS);
for (int i = 0; i < StciIndexed.NUMBER_OF_COLORS; i++)
{
_colors.Add(Color.FromRgb(_stciPalette[i * 3], _stciPalette[i * 3 + 1], _stciPalette[i * 3 + 2]));
}
var _palette = new BitmapPalette(_colors);
var _gifCoder = new GifBitmapCoder(_palette);
_gifCoder.Extensions.Add(new GifCommentExtension("Egorov A. V. for ja2.su"));
Int16 _minOffsetX = Int16.MaxValue;
Int16 _minOffsetY = Int16.MaxValue;
int foreshotingCount = 0;
foreach (var _subImage in aStci.Images)
{
if (_subImage.AuxData != null && _subImage.AuxData.NumberOfFrames > 0)
{
foreshotingCount++;
}
if (aForeshotingNumber > 0 && aForeshotingNumber != foreshotingCount)
{
continue;
}
var _header = _subImage.Header;
_minOffsetX = Math.Min(_minOffsetX, _header.OffsetX);
_minOffsetY = Math.Min(_minOffsetY, _header.OffsetY);
}
if (_minOffsetX < 0 || _minOffsetY < 0)
{
var _shiftData = new List <byte>(4);
_shiftData.AddRange(BitConverter.GetBytes(_minOffsetX));
_shiftData.AddRange(BitConverter.GetBytes(_minOffsetY));
var _shiftExtension = new GifApplicationExtension(ApplicationId, _shiftData.ToArray());
_gifCoder.Extensions.Add(_shiftExtension);
}
foreshotingCount = 0;
foreach (var _subImage in aStci.Images)
{
if (_subImage.AuxData != null && _subImage.AuxData.NumberOfFrames > 0)
{
foreshotingCount++;
}
if (aForeshotingNumber > 0 && aForeshotingNumber != foreshotingCount)
{
continue;
}
var _header = _subImage.Header;
var _imageSource = BitmapSource.Create(
_header.Width,
_header.Height,
96, 96,
PixelFormats.Indexed8,
_palette,
_subImage.ImageData,
_header.Width);
var _frame = BitmapFrame.Create(_imageSource);
var _offsetX = _header.OffsetX;
var _offsetY = _header.OffsetY;
if (_minOffsetX < 0 || _minOffsetY < 0)
{
// GIF format suports only positive offsets
_offsetX = (short)(_offsetX - _minOffsetX);
_offsetY = (short)(_offsetY - _minOffsetY);
}
var _bf = new GifBitmapFrame(_frame, (ushort)_offsetX, (ushort)_offsetY);
if (_subImage.AuxData != null)
{
var _auxData = new byte[AuxObjectData.SIZE];
_subImage.AuxData.Save(new MemoryStream(_auxData));
_bf.Extensions.Add(new GifApplicationExtension(ApplicationId, _auxData));
}
_bf.DisposalMethod = GifFrameDisposalMethod.RestoreToBackgroundColor;
_bf.UseGlobalPalette = true;
_bf.UseTransparency = aUseTransparent;
_bf.Delay = aDelay;
if (aUseTransparent)
{
_bf.TransparentColorIndex = (byte)aStci.Header.TransparentColorIndex;
}
_gifCoder.AddFrame(_bf);
}
return(_gifCoder);
}
