public WicPlanarCache(WicTransform prev) : base(prev)
{
if (!(prev.Source is IWICPlanarBitmapSourceTransform))
{
throw new NotSupportedException("Transform chain doesn't support planar mode. Only JPEG Decoder, Rotator, Scaler, and ColorSpaceConverter are allowed");
}
var trans = (IWICPlanarBitmapSourceTransform)prev.Source;
double rat = Context.Settings.HybridScaleRatio.Clamp(1d, 8d);
Context.Width = (uint)Math.Ceiling(Context.Width / rat);
Context.Height = (uint)Math.Ceiling(Context.Height / rat);
// Although generally the last scan has the least significant bit(s) of the luma plane and skipping it could be very beneficial performance-wise, there is no guarantee of scan order. Might be able to do something with more decoder support.
//var prog = Frame as IWICProgressiveLevelControl;
//if (prog != null)
//{
// uint levels = prog.GetLevelCount();
// uint level = (uint)Math.Ceiling(levels / rat) + (Context.Settings.HybridMode == HybridScaleMode.FavorQuality || Context.Settings.HybridMode == HybridScaleMode.Off ? (uint)Math.Ceiling(levels / 8d) : 0u);
// prog.SetCurrentLevel(Math.Min(level, levels - (Context.Settings.ScaleRatio >= 2d && levels > 7u ? 2u : 1u)));
//}
var fmts = new Guid[] { Consts.GUID_WICPixelFormat8bppY, Consts.GUID_WICPixelFormat16bppCbCr };
var desc = new WICBitmapPlaneDescription[2];
if (!trans.DoesSupportTransform(ref Context.Width, ref Context.Height, Context.TransformOptions, WICPlanarOptions.WICPlanarOptionsDefault, fmts, desc, 2))
{
throw new NotSupportedException("Requested planar transform not supported");
}
var crop = new WICRect {
X = Context.Settings.Crop.X, Y = Context.Settings.Crop.Y, Width = Context.Settings.Crop.Width, Height = Context.Settings.Crop.Height
};
cacheSource = new WicPlanarCacheSource(trans, desc[0], desc[1], crop, Context.TransformOptions, Context.Width, Context.Height, rat, Context.NeedsCache);
SourceY = cacheSource.GetPlane(WicPlane.Luma);
SourceCbCr = cacheSource.GetPlane(WicPlane.Chroma);
}
public WicPlanarCache(WicTransform prev) : base(prev)
{
Contract.Requires <NotSupportedException>(prev.Source is IWICPlanarBitmapSourceTransform, "Transform chain doesn't support planar mode. Only JPEG Decoder, Rotator, Scaler, and ColorSpaceConverter are allowed");
var trans = (IWICPlanarBitmapSourceTransform)prev.Source;
double rat = Context.Settings.HybridScaleRatio.Clamp(1d, 8d);
Context.Width = (uint)Math.Ceiling(Context.Width / rat);
Context.Height = (uint)Math.Ceiling(Context.Height / rat);
var prog = Frame as IWICProgressiveLevelControl;
if (prog != null) // TODO needs work
{
uint levels = prog.GetLevelCount();
uint level = (uint)Math.Ceiling(levels / rat) + (Context.Settings.HybridMode == HybridScaleMode.FavorQuality || Context.Settings.HybridMode == HybridScaleMode.Off ? (uint)Math.Ceiling(levels / 8d) : 0u);
prog.SetCurrentLevel(Math.Min(level, levels - (Context.Settings.ScaleRatio >= 2d && levels > 7u ? 2u : 1u)));
}
var fmts = new Guid[] { Consts.GUID_WICPixelFormat8bppY, Consts.GUID_WICPixelFormat16bppCbCr };
var desc = new WICBitmapPlaneDescription[2];
if (!trans.DoesSupportTransform(ref Context.Width, ref Context.Height, Context.TransformOptions, WICPlanarOptions.WICPlanarOptionsPreserveSubsampling, fmts, desc, 2))
{
throw new NotSupportedException("Planar Transform not supported");
}
var crop = new WICRect()
{
X = Context.Settings.Crop.X, Y = Context.Settings.Crop.Y, Width = Context.Settings.Crop.Width, Height = Context.Settings.Crop.Height
};
var source = new WicPlanarCacheSource(trans, desc[0], desc[1], crop, Context.TransformOptions, Context.Width, Context.Height, rat);
SourceY = source.GetPlane(WicPlane.Luma);
SourceCbCr = source.GetPlane(WicPlane.Chroma);
}