public static RasterCacheResult RasterizePicture(SKPicture picture, GRContext context, SKMatrix ctm, SKColorSpace dst_color_space, bool checkerboard)
{
TRACE_EVENT0("flutter", "RasterCachePopulate");
//C++ TO C# CONVERTER TODO TASK: Only lambda expressions having all locals passed by reference can be converted to C#:
//ORIGINAL LINE: return Rasterize(context, ctm, dst_color_space, checkerboard, picture->cullRect(), [=](SKCanvas* canvas)
return(Rasterize(context, ctm, dst_color_space, checkerboard, picture.CullRect, (SKCanvas canvas) =>
{
canvas.DrawPicture(picture);
}));
}
protected virtual SKImage ConvertProfile(SKImage data, float width, float height)
{
using SKImage srcImg = data;
SKImageInfo info = new SKImageInfo((int)width, (int)height,
SKImageInfo.PlatformColorType, SKAlphaType.Opaque, SKColorSpace.CreateSrgb());
// this is the important part. set the destination ColorSpace as
// `SKColorSpace.CreateSrgb()`. Skia will then be able to automatically convert
// the original CMYK colorspace, to this new sRGB colorspace.
SKImage newImg = SKImage.Create(info);
srcImg.ScalePixels(newImg.PeekPixels(), SKFilterQuality.None);
// Remove transparency
var bitmap = RemoveTransparency(srcImg);
newImg = SKImage.FromBitmap(bitmap);
// now when doing this resize, Skia knows the original ColorSpace, and the
// destination ColorSpace, and converts the colors from CMYK to sRGB.
return(newImg);
}
public static SKBitmap?ToBitmap(this SKPicture skPicture, SKColor background, float scaleX, float scaleY, SKColorType skColorType, SKAlphaType skAlphaType, SKColorSpace skColorSpace)
public static bool ToImage(this SKPicture skPicture, Stream stream, SKColor background, SKEncodedImageFormat format, int quality, float scaleX, float scaleY, SKColorType skColorType, SKAlphaType skAlphaType, SKColorSpace skColorSpace)
{
using (var skBitmap = skPicture.ToBitmap(background, scaleX, scaleY, skColorType, skAlphaType, skColorSpace))
{
private static unsafe bool DrawVideo(Stream videoStream, ThumbnailsRenderContext ctx)
{
using var formatContext = new FormatContext(videoStream);
var stream = formatContext.FindBestVideoStream();
if (stream == null)
{
return(false);
}
using var videoStreamDecoder = stream.CreateStreamDecoder();
try
{
if (videoStreamDecoder.Duration <= 0)
{
videoStreamDecoder.SeekFrame(10 * 1000000);
}
if (videoStreamDecoder.Duration > 3)
{
videoStreamDecoder.SeekFrame(videoStreamDecoder.Duration / 3);
}
}
catch (FFmpegException err)
{
Console.WriteLine("Seek failed: " + err);
}
var destinationSize = ThumbnailUtils.ContainSize(
new SKSize(videoStreamDecoder.FrameWidth, videoStreamDecoder.FrameHeight),
new SKSize(ThumbnailUtils.DefaultMaxWidth * ctx.Density, ThumbnailUtils.DefaultMaxHeight * ctx.Density)).ToSizeI();
var sourcePixelFormat = videoStreamDecoder.PixelFormat;
if (!videoStreamDecoder.MoveNext())
{
throw new InvalidDataException("Can't decode the video.");
}
using var vfc =
new VideoFrameConverter(
videoStreamDecoder.FrameWidth,
videoStreamDecoder.FrameHeight,
sourcePixelFormat,
destinationSize.Width,
destinationSize.Height);
var convertedFrame = vfc.Convert(videoStreamDecoder.Current.Value);
using var colorspace = SKColorSpace.CreateSrgb();
var sourceImageInfo = new SKImageInfo(
convertedFrame.width,
convertedFrame.height,
SKColorType.Rgba8888,
SKAlphaType.Unpremul,
colorspace);
using var image =
SKImage.FromPixels(sourceImageInfo, (IntPtr)convertedFrame.data[0], sourceImageInfo.RowBytes);
_cachedDecorationImage ??= SKImage.FromEncodedData(ReadDecorationImage());
ThumbnailUtils.DrawShadowView(
ctx,
new SkImageView(image),
_cachedDecorationImage,
new SKColor(0, 0, 0),
minSize: new SKSize(24, 24));
return(true);
}
