private static void FlushCurrentFrame(GifBitmapEncoder encoder,
ImagingFactory factory,
BitmapFrame bitmap)
{
// nothing to flush.
if (bitmap == null)
{
return;
}
using (var frameEncoder = new BitmapFrameEncode(encoder))
{
frameEncoder.Initialize();
frameEncoder.SetSize(bitmap.Data.Width, bitmap.Data.Height);
frameEncoder.SetResolution(bitmap.Data.HorizontalResolution, bitmap.Data.VerticalResolution);
// embed frame metadata.
var metadataWriter = frameEncoder.MetadataQueryWriter;
metadataWriter.SetMetadataByName("/grctlext/Delay", Convert.ToUInt16(bitmap.Delay/100));
metadataWriter.SetMetadataByName("/imgdesc/Left", Convert.ToUInt16(bitmap.XPos));
metadataWriter.SetMetadataByName("/imgdesc/Top", Convert.ToUInt16(bitmap.YPos));
metadataWriter.SetMetadataByName("/imgdesc/Width", Convert.ToUInt16(bitmap.Data.Width));
metadataWriter.SetMetadataByName("/imgdesc/Height", Convert.ToUInt16(bitmap.Data.Height));
using (var bitmapSource = new WicBitmap(
factory,
bitmap.Data,
BitmapAlphaChannelOption.UsePremultipliedAlpha))
{
var converter = new FormatConverter(factory);
converter.Initialize(bitmapSource,
PixelFormat.Format8bppIndexed,
BitmapDitherType.Solid,
null,
0.8,
BitmapPaletteType.MedianCut);
frameEncoder.WriteSource(converter);
frameEncoder.Commit();
}
}
}
public async void Start(Rectangle rect)
{
// intoduce a delay of one second.
await Task.Delay(TimeSpan.FromSeconds(1));
_snapshotManager = new SnapshotManager(rect.Left, rect.Top, rect.Width, rect.Height);
_stream = new MemoryStream();
_gifBitmapEncoder = new GifBitmapEncoder(_imagingFactory);
_gifBitmapEncoder.Initialize(_stream);
_width = rect.Width;
_height = rect.Height;
InitAndLaunchTimer();
}
/// <summary>
/// Saves a texture to a stream as an image.
/// </summary>
/// <param name="texture">The texture to save.</param>
/// <param name="imageFormat">The image format of the saved image.</param>
/// <param name="imageResolutionInDpi">The image resolution in dpi.</param>
/// <param name="toStream">The stream to save the texture to.</param>
public static void SaveToStream(this Texture2D texture, System.Drawing.Imaging.ImageFormat imageFormat, double imageResolutionInDpi, System.IO.Stream toStream)
{
Texture2D textureCopy = null;
ImagingFactory imagingFactory = null;
Bitmap bitmap = null;
BitmapEncoder bitmapEncoder = null;
try
{
textureCopy = new Texture2D(texture.Device, new Texture2DDescription
{
Width = (int)texture.Description.Width,
Height = (int)texture.Description.Height,
MipLevels = 1,
ArraySize = 1,
Format = texture.Description.Format,
Usage = ResourceUsage.Staging,
SampleDescription = new SampleDescription(1, 0),
BindFlags = BindFlags.None,
CpuAccessFlags = CpuAccessFlags.Read,
OptionFlags = ResourceOptionFlags.None
});
texture.Device.CopyResource(texture, textureCopy);
DataRectangle dataRectangle = textureCopy.Map(0, MapMode.Read, SharpDX.Direct3D10.MapFlags.None);
imagingFactory = new ImagingFactory();
bitmap = new Bitmap(
imagingFactory,
textureCopy.Description.Width,
textureCopy.Description.Height,
PixelFormat.Format32bppBGRA,
dataRectangle);
toStream.Position = 0;
if (imageFormat == System.Drawing.Imaging.ImageFormat.Png)
bitmapEncoder = new PngBitmapEncoder(imagingFactory, toStream);
else if (imageFormat == System.Drawing.Imaging.ImageFormat.Bmp)
bitmapEncoder = new BmpBitmapEncoder(imagingFactory, toStream);
else if (imageFormat == System.Drawing.Imaging.ImageFormat.Gif)
bitmapEncoder = new GifBitmapEncoder(imagingFactory, toStream);
else if (imageFormat == System.Drawing.Imaging.ImageFormat.Jpeg)
bitmapEncoder = new JpegBitmapEncoder(imagingFactory, toStream);
else if (imageFormat == System.Drawing.Imaging.ImageFormat.Tiff)
bitmapEncoder = new TiffBitmapEncoder(imagingFactory, toStream);
else
bitmapEncoder = new PngBitmapEncoder(imagingFactory, toStream);
using (var bitmapFrameEncode = new BitmapFrameEncode(bitmapEncoder))
{
bitmapFrameEncode.Initialize();
bitmapFrameEncode.SetSize(bitmap.Size.Width, bitmap.Size.Height);
var pixelFormat = PixelFormat.FormatDontCare;
bitmapFrameEncode.SetPixelFormat(ref pixelFormat);
bitmapFrameEncode.SetResolution(imageResolutionInDpi, imageResolutionInDpi);
bitmapFrameEncode.WriteSource(bitmap);
bitmapFrameEncode.Commit();
bitmapEncoder.Commit();
}
}
finally
{
bitmapEncoder?.Dispose();
textureCopy?.Unmap(0);
textureCopy?.Dispose();
bitmap?.Dispose();
imagingFactory?.Dispose();
}
}
