/// <summary>
/// Copied an area of pixels to the image.
/// </summary>
/// <param name="area">The area.</param>
/// <param name="sourceY">The source row index.</param>
/// <param name="sourceX">The source column index.</param>
/// <exception cref="NotSupportedException">
/// Thrown when an unsupported component order value is passed.
/// </exception>
public void CopyTo(PixelArea <TColor, TPacked> area, int sourceY, int sourceX = 0)
{
int width = Math.Min(area.Width, this.Width - sourceX);
int height = Math.Min(area.Height, this.Height - sourceY);
this.CheckDimensions(width, height);
switch (area.ComponentOrder)
{
case ComponentOrder.ZYX:
this.CopyToZYX(area, sourceY, sourceX, width, height);
break;
case ComponentOrder.ZYXW:
this.CopyToZYXW(area, sourceY, sourceX, width, height);
break;
case ComponentOrder.XYZ:
this.CopyToXYZ(area, sourceY, sourceX, width, height);
break;
case ComponentOrder.XYZW:
this.CopyToXYZW(area, sourceY, sourceX, width, height);
break;
default:
throw new NotSupportedException();
}
}
private void CopyToZyx(PixelArea <TColor> area, int sourceX, int sourceY, int width, int height)
{
for (int y = 0; y < height; y++)
{
BufferPointer <TColor> source = this.GetRowPointer(sourceX, sourceY + y);
BufferPointer <byte> destination = area.GetRowPointer(y);
Operations.ToZyxBytes(source, destination, width);
}
}
private void CopyToZyxw(PixelArea <TPixel> area, int sourceX, int sourceY, int width, int height)
{
for (int y = 0; y < height; y++)
{
Span <TPixel> source = this.GetRowSpan(sourceX, sourceY + y);
Span <byte> destination = area.GetRowSpan(y);
Operations.ToZyxwBytes(source, destination, width);
}
}
private void CopyToXyzw(PixelArea <TColor> area, int sourceX, int sourceY, int width, int height)
{
for (int y = 0; y < height; y++)
{
BufferSpan <TColor> source = this.GetRowSpan(sourceX, sourceY + y);
BufferSpan <byte> destination = area.GetRowSpan(y);
Operations.ToXyzwBytes(source, destination, width);
}
}
private void CopyFromXyzw(PixelArea <TColor> area, int targetX, int targetY, int width, int height)
{
for (int y = 0; y < height; y++)
{
BufferSpan <byte> source = area.GetRowSpan(y);
BufferSpan <TColor> destination = this.GetRowSpan(targetX, targetY + y);
Operations.PackFromXyzwBytes(source, destination, width);
}
}
private void CopyFromZyx(PixelArea <TPixel> area, int targetX, int targetY, int width, int height)
{
for (int y = 0; y < height; y++)
{
Span <byte> source = area.GetRowSpan(y);
Span <TPixel> destination = this.GetRowSpan(targetX, targetY + y);
Operations.PackFromZyxBytes(source, destination, width);
}
}
/// <inheritdoc />
protected override void CopyFromXYZW(PixelArea <Color, uint> area, int targetY, int targetX, int width, int height)
{
uint byteCount = (uint)width * 4;
for (int y = 0; y < height; y++)
{
byte *source = area.PixelBase + (y * area.RowByteCount);
byte *destination = this.GetRowPointer(targetX, targetY + y);
Unsafe.CopyBlock(destination, source, byteCount);
}
}
/// <summary>
/// Copies to an area in <see cref="ComponentOrder.XYZW"/> format.
/// </summary>
/// <param name="area">The row.</param>
/// <param name="sourceY">The source row index.</param>
/// <param name="sourceX">The source column index.</param>
/// <param name="width">The width.</param>
/// <param name="height">The height.</param>
protected virtual void CopyToXYZW(PixelArea <TColor, TPacked> area, int sourceY, int sourceX, int width, int height)
{
for (int y = 0; y < height; y++)
{
int offset = y * area.RowByteCount;
for (int x = 0; x < width; x++)
{
this[sourceX + x, sourceY + y].ToBytes(area.Bytes, offset, ComponentOrder.XYZW);
offset += 4;
}
}
}
/// <summary>
/// Copies to an area in <see cref="ComponentOrder.Xyzw"/> format.
/// </summary>
/// <param name="area">The row.</param>
/// <param name="sourceX">The source column index.</param>
/// <param name="sourceY">The source row index.</param>
/// <param name="width">The width.</param>
/// <param name="height">The height.</param>
protected virtual void CopyToXyzw(PixelArea <TColor> area, int sourceX, int sourceY, int width, int height)
{
for (int y = 0; y < height; y++)
{
int offset = y * area.RowStride;
for (int x = 0; x < width; x++)
{
this[sourceX + x, sourceY + y].ToXyzwBytes(area.Bytes, offset);
offset += 4;
}
}
}
/// <inheritdoc />
protected override void CopyFromZYXW(PixelArea <Color, uint> area, int targetY, int targetX, int width, int height)
{
for (int y = 0; y < height; y++)
{
byte *source = area.PixelBase + (y * area.RowByteCount);
byte *destination = this.GetRowPointer(targetX, targetY + y);
for (int x = 0; x < width; x++)
{
Unsafe.Write(destination, (uint)(*(source + 2) << 0 | *(source + 1) << 8 | *source << 16 | *(source + 3) << 24));
source += 4;
destination += 4;
}
}
}
private void CheckCoordinates(PixelArea <TColor> area, int x, int y)
{
int width = Math.Min(area.Width, this.Width - x);
if (width < 1)
{
throw new ArgumentOutOfRangeException(nameof(width), width, "Invalid area size specified.");
}
int height = Math.Min(area.Height, this.Height - y);
if (height < 1)
{
throw new ArgumentOutOfRangeException(nameof(height), height, "Invalid area size specified.");
}
}
/// <summary>
/// Copy pixels from the image to an area of pixels. This method will make sure that the pixels
/// that are copied are within the bounds of the image.
/// </summary>
/// <param name="area">The area.</param>
/// <param name="sourceY">The source row index.</param>
/// <param name="sourceX">The source column index.</param>
/// <exception cref="NotSupportedException">
/// Thrown when an unsupported component order value is passed.
/// </exception>
internal void SafeCopyTo(PixelArea <TColor> area, int sourceY, int sourceX = 0)
{
int width = Math.Min(area.Width, this.Width - sourceX);
if (width < 1)
{
return;
}
int height = Math.Min(area.Height, this.Height - sourceY);
if (height < 1)
{
return;
}
this.CopyTo(area, sourceX, sourceY, width, height);
}
/// <inheritdoc />
protected override void CopyToZYX(PixelArea <Color, uint> area, int sourceY, int sourceX, int width, int height)
{
for (int y = 0; y < height; y++)
{
byte *source = this.GetRowPointer(sourceX, sourceY + y);
byte *destination = area.PixelBase + (y * area.RowByteCount);
for (int x = 0; x < width; x++)
{
*destination = *(source + 2);
*(destination + 1) = *(source + 1);
*(destination + 2) = *(source + 0);
source += 4;
destination += 3;
}
}
}
/// <summary>
/// Copies from an area in <see cref="ComponentOrder.XYZW"/> format.
/// </summary>
/// <param name="area">The area.</param>
/// <param name="targetY">The target row index.</param>
/// <param name="targetX">The target column index.</param>
/// <param name="width">The width.</param>
/// <param name="height">The height.</param>
protected virtual void CopyFromXYZW(PixelArea <TColor, TPacked> area, int targetY, int targetX, int width, int height)
{
TColor packed = default(TColor);
int size = Unsafe.SizeOf <TColor>();
for (int y = 0; y < height; y++)
{
byte *source = area.PixelBase + (y * area.RowByteCount);
byte *destination = this.GetRowPointer(targetX, targetY + y);
for (int x = 0; x < width; x++)
{
packed.PackFromBytes(*source, *(source + 1), *(source + 2), *(source + 3));
Unsafe.Write(destination, packed);
source += 4;
destination += size;
}
}
}
/// <summary>
/// Copy pixels from the image to an area of pixels.
/// </summary>
/// <param name="area">The area.</param>
/// <param name="sourceX">The source column index.</param>
/// <param name="sourceY">The source row index.</param>
/// <param name="width">The width of the area to copy.</param>
/// <param name="height">The height of the area to copy.</param>
/// <exception cref="NotSupportedException">
/// Thrown when an unsupported component order value is passed.
/// </exception>
private void CopyTo(PixelArea <TColor> area, int sourceX, int sourceY, int width, int height)
{
switch (area.ComponentOrder)
{
case ComponentOrder.Zyx:
this.CopyToZyx(area, sourceX, sourceY, width, height);
break;
case ComponentOrder.Zyxw:
this.CopyToZyxw(area, sourceX, sourceY, width, height);
break;
case ComponentOrder.Xyz:
this.CopyToXyz(area, sourceX, sourceY, width, height);
break;
case ComponentOrder.Xyzw:
this.CopyToXyzw(area, sourceX, sourceY, width, height);
break;
default:
throw new NotSupportedException();
}
}
/// <summary>
/// Copy an area of pixels to the image.
/// </summary>
/// <param name="area">The area.</param>
/// <param name="targetX">The target column index.</param>
/// <param name="targetY">The target row index.</param>
/// <param name="width">The width of the area to copy.</param>
/// <param name="height">The height of the area to copy.</param>
/// <exception cref="NotSupportedException">
/// Thrown when an unsupported component order value is passed.
/// </exception>
private void CopyFrom(PixelArea <TColor> area, int targetX, int targetY, int width, int height)
{
switch (area.ComponentOrder)
{
case ComponentOrder.Zyx:
this.CopyFromZyx(area, targetX, targetY, width, height);
break;
case ComponentOrder.Zyxw:
this.CopyFromZyxw(area, targetX, targetY, width, height);
break;
case ComponentOrder.Xyz:
this.CopyFromXyz(area, targetX, targetY, width, height);
break;
case ComponentOrder.Xyzw:
this.CopyFromXyzw(area, targetX, targetY, width, height);
break;
default:
throw new NotSupportedException();
}
}
/// <summary>
/// Copy an area of pixels to the image.
/// </summary>
/// <param name="area">The area.</param>
/// <param name="targetY">The target row index.</param>
/// <param name="targetX">The target column index.</param>
/// <exception cref="NotSupportedException">
/// Thrown when an unsupported component order value is passed.
/// </exception>
internal void CopyFrom(PixelArea <TColor> area, int targetY, int targetX = 0)
{
this.CheckCoordinates(area, targetX, targetY);
this.CopyFrom(area, targetX, targetY, area.Width, area.Height);
}
/// <summary>
/// Copy pixels from the image to an area of pixels.
/// </summary>
/// <param name="area">The area.</param>
/// <param name="sourceY">The source row index.</param>
/// <param name="sourceX">The source column index.</param>
/// <exception cref="NotSupportedException">
/// Thrown when an unsupported component order value is passed.
/// </exception>
internal void CopyTo(PixelArea <TColor> area, int sourceY, int sourceX = 0)
{
this.CheckCoordinates(area, sourceX, sourceY);
this.CopyTo(area, sourceX, sourceY, area.Width, area.Height);
}
