/// <summary>
/// Invoke <see cref="JpegBlockPostProcessor"/> for <see cref="BlockRowsPerStep"/> block rows, copy the result into <see cref="ColorBuffer"/>.
/// </summary>
public void CopyBlocksToColorBuffer()
{
var blockPp = new JpegBlockPostProcessor(this.ImagePostProcessor.RawJpeg, this.Component);
for (int y = 0; y < this.BlockRowsPerStep; y++)
{
int yBlock = this.currentComponentRowInBlocks + y;
if (yBlock >= this.SizeInBlocks.Height)
{
break;
}
int yBuffer = y * this.blockAreaSize.Height;
Span <Block8x8> blockRow = this.Component.SpectralBlocks.GetRowSpan(yBlock);
ref Block8x8 blockRowBase = ref MemoryMarshal.GetReference(blockRow);
for (int xBlock = 0; xBlock < this.SizeInBlocks.Width; xBlock++)
{
ref Block8x8 block = ref Unsafe.Add(ref blockRowBase, xBlock);
int xBuffer = xBlock * this.blockAreaSize.Width;
BufferArea <float> destArea = this.ColorBuffer.GetArea(
xBuffer,
yBuffer,
this.blockAreaSize.Width,
this.blockAreaSize.Height);
blockPp.ProcessBlockColorsInto(ref block, destArea);
}
/// <summary>
/// Invoke <see cref="JpegBlockPostProcessor"/> for <see cref="BlockRowsPerStep"/> block rows, copy the result into <see cref="ColorBuffer"/>.
/// </summary>
public void CopyBlocksToColorBuffer()
{
var blockPp = new JpegBlockPostProcessor(this.ImagePostProcessor.RawJpeg, this.Component);
for (int y = 0; y < this.BlockRowsPerStep; y++)
{
int yBlock = this.currentComponentRowInBlocks + y;
if (yBlock >= this.SizeInBlocks.Height)
{
break;
}
int yBuffer = y * this.blockAreaSize.Height;
for (int x = 0; x < this.SizeInBlocks.Width; x++)
{
int xBlock = x;
int xBuffer = x * this.blockAreaSize.Width;
ref Block8x8 block = ref this.Component.GetBlockReference(xBlock, yBlock);
BufferArea <float> destArea = this.ColorBuffer.GetArea(
xBuffer,
yBuffer,
this.blockAreaSize.Width,
this.blockAreaSize.Height);
blockPp.ProcessBlockColorsInto(ref block, destArea);
}
}
/// <summary>
/// Invoke <see cref="JpegBlockPostProcessor"/> for <see cref="BlockRowsPerStep"/> block rows, copy the result into <see cref="ColorBuffer"/>.
/// </summary>
public void CopyBlocksToColorBuffer()
{
var blockPp = new JpegBlockPostProcessor(this.ImagePostProcessor.RawJpeg, this.Component);
float maximumValue = MathF.Pow(2, this.ImagePostProcessor.RawJpeg.Precision) - 1;
int destAreaStride = this.ColorBuffer.Width;
for (int y = 0; y < this.BlockRowsPerStep; y++)
{
int yBlock = this.currentComponentRowInBlocks + y;
if (yBlock >= this.SizeInBlocks.Height)
{
break;
}
int yBuffer = y * this.blockAreaSize.Height;
Span <float> colorBufferRow = this.ColorBuffer.GetRowSpan(yBuffer);
Span <Block8x8> blockRow = this.Component.SpectralBlocks.GetRowSpan(yBlock);
// see: https://github.com/SixLabors/ImageSharp/issues/824
int widthInBlocks = Math.Min(this.Component.SpectralBlocks.Width, this.SizeInBlocks.Width);
for (int xBlock = 0; xBlock < widthInBlocks; xBlock++)
{
ref Block8x8 block = ref blockRow[xBlock];
int xBuffer = xBlock * this.blockAreaSize.Width;
ref float destAreaOrigin = ref colorBufferRow[xBuffer];
blockPp.ProcessBlockColorsInto(ref block, ref destAreaOrigin, destAreaStride, maximumValue);
}
/// <summary>
/// Invoke <see cref="JpegBlockPostProcessor"/> for <see cref="BlockRowsPerStep"/> block rows, copy the result into <see cref="ColorBuffer"/>.
/// </summary>
public void CopyBlocksToColorBuffer(int step)
{
Buffer2D <Block8x8> spectralBuffer = this.Component.SpectralBlocks;
var blockPp = new JpegBlockPostProcessor(this.RawJpeg, this.Component);
float maximumValue = this.frame.MaxColorChannelValue;
int destAreaStride = this.ColorBuffer.Width;
int yBlockStart = step * this.BlockRowsPerStep;
for (int y = 0; y < this.BlockRowsPerStep; y++)
{
int yBlock = yBlockStart + y;
if (yBlock >= spectralBuffer.Height)
{
break;
}
int yBuffer = y * this.blockAreaSize.Height;
Span <float> colorBufferRow = this.ColorBuffer.GetRowSpan(yBuffer);
Span <Block8x8> blockRow = spectralBuffer.GetRowSpan(yBlock);
// see: https://github.com/SixLabors/ImageSharp/issues/824
int widthInBlocks = Math.Min(spectralBuffer.Width, this.SizeInBlocks.Width);
for (int xBlock = 0; xBlock < widthInBlocks; xBlock++)
{
ref Block8x8 block = ref blockRow[xBlock];
int xBuffer = xBlock * this.blockAreaSize.Width;
ref float destAreaOrigin = ref colorBufferRow[xBuffer];
blockPp.ProcessBlockColorsInto(ref block, ref destAreaOrigin, destAreaStride, maximumValue);
}
