public static void AddCropper(PipelineContext ctx, PixelArea area = default)
{
var crop = area.IsEmpty ? PixelArea.FromGdiRect(ctx.Settings.Crop).DeOrient(ctx.Orientation, ctx.Source.Width, ctx.Source.Height) : area;
if (crop == ctx.Source.Area)
{
return;
}
ctx.Source = new CropTransform(ctx.Source, crop);
}
public static void AddPlanarCropper(PipelineContext ctx)
{
Debug.Assert(ctx.PlanarContext is not null);
var crop = PixelArea.FromGdiRect(ctx.Settings.Crop).DeOrient(ctx.Orientation, ctx.Source.Width, ctx.Source.Height);
if (crop == ctx.Source.Area)
{
return;
}
int yw = ctx.Source.Width;
int yh = ctx.Source.Height;
int cw = ctx.PlanarContext.SourceCb.Width;
int ch = ctx.PlanarContext.SourceCb.Height;
int ratioX = (yw + 1) / cw;
int ratioY = (yh + 1) / ch;
int scropX = MathUtil.PowerOfTwoFloor(crop.X, ratioX);
int scropY = MathUtil.PowerOfTwoFloor(crop.Y, ratioY);
int scropW = Math.Min(MathUtil.PowerOfTwoCeiling(crop.Width, ratioX), yw - scropX);
int scropH = Math.Min(MathUtil.PowerOfTwoCeiling(crop.Height, ratioY), yh - scropY);
var scrop = new PixelArea(scropX, scropY, scropW, scropH);
AddCropper(ctx, scrop);
ctx.PlanarContext.SourceY = ctx.Source;
ctx.Source = ctx.PlanarContext.SourceCb;
cw = Math.Min(MathUtil.DivCeiling(scrop.Width, ratioX), cw);
ch = Math.Min(MathUtil.DivCeiling(scrop.Height, ratioY), ch);
scrop = new PixelArea(scrop.X / ratioX, scrop.Y / ratioY, cw, ch);
AddCropper(ctx, scrop);
ctx.PlanarContext.SourceCb = ctx.Source;
ctx.Source = ctx.PlanarContext.SourceCr;
AddCropper(ctx, scrop);
ctx.PlanarContext.SourceCr = ctx.Source;
ctx.Source = ctx.PlanarContext.SourceY;
}
public static void AddPad(PipelineContext ctx)
{
if (ctx.Settings.InnerSize == ctx.Settings.OuterSize)
{
return;
}
AddExternalFormatConverter(ctx);
ctx.Source = new PadTransformInternal(ctx.Source, ctx.Settings.MatteColor, PixelArea.FromGdiRect(ctx.Settings.InnerRect), PixelArea.FromGdiSize(ctx.Settings.OuterSize));
}
public static void AddPad(PipelineContext ctx)
{
if (ctx.Settings.InnerSize == ctx.Settings.OuterSize)
{
return;
}
AddExternalFormatConverter(ctx);
var fmt = ctx.Source.Format;
if (fmt.AlphaRepresentation == PixelAlphaRepresentation.None && ctx.Settings.MatteColor.IsTransparent())
{
ctx.Source = ctx.AddDispose(new ConversionTransform(ctx.Source, null, null, PixelFormat.Bgra32Bpp));
}
else if (fmt.ColorRepresentation == PixelColorRepresentation.Grey && !ctx.Settings.MatteColor.IsGrey())
{
ctx.Source = ctx.AddDispose(new ConversionTransform(ctx.Source, null, null, PixelFormat.Bgr24Bpp));
}
ctx.Source = new PadTransformInternal(ctx.Source, ctx.Settings.MatteColor, PixelArea.FromGdiRect(ctx.Settings.InnerRect), PixelArea.FromGdiSize(ctx.Settings.OuterSize));
}
/// <inheritdoc />
public unsafe void CopyPixels(Rectangle sourceArea, int cbStride, Span <byte> buffer)
{
fixed(byte *pbBuffer = buffer)
Source.CopyPixels(PixelArea.FromGdiRect(sourceArea), cbStride, buffer.Length, (IntPtr)pbBuffer);
}
