public void Dispose()
{
if (!disposed)
{
disposed = true;
if (scaledChannelSurface != null)
{
scaledChannelSurface.Dispose();
scaledChannelSurface = null;
}
if (ditheredChannelSurface != null)
{
ditheredChannelSurface.Dispose();
ditheredChannelSurface = null;
}
if (scaledSelectionMask != null)
{
scaledSelectionMask.Dispose();
scaledSelectionMask = null;
}
}
}
/// <summary>
/// Initializes a new instance of the <see cref="ChannelPortsSuite"/> class.
/// </summary>
/// <param name="filterImageProvider">The filter image provider.</param>
/// <param name="imageMode">The image mode.</param>
/// <exception cref="ArgumentNullException"><paramref name="filterImageProvider"/> is null.</exception>
public unsafe ChannelPortsSuite(IFilterImageProvider filterImageProvider, ImageModes imageMode)
{
if (filterImageProvider == null)
{
throw new ArgumentNullException(nameof(filterImageProvider));
}
this.filterImageProvider = filterImageProvider;
this.imageMode = imageMode;
readPixelsProc = new ReadPixelsProc(ReadPixelsProc);
writeBasePixelsProc = new WriteBasePixelsProc(WriteBasePixels);
readPortForWritePortProc = new ReadPortForWritePortProc(ReadPortForWritePort);
scaledChannelSurface = null;
ditheredChannelSurface = null;
scaledSelectionMask = null;
disposed = false;
}
private static unsafe void FillSelectionMask(PixelMemoryDesc *destiniation, SurfaceGray8 source, VRect srcRect)
{
byte *dstPtr = (byte *)destiniation->data.ToPointer();
int stride = destiniation->rowBits / 8;
int bpp = destiniation->colBits / 8;
int offset = destiniation->bitOffset / 8;
for (int y = srcRect.top; y < srcRect.bottom; y++)
{
byte *src = source.GetPointAddressUnchecked(srcRect.left, y);
byte *dst = dstPtr + (y * stride) + offset;
for (int x = srcRect.left; x < srcRect.right; x++)
{
*dst = *src;
src++;
dst += bpp;
}
}
}
private unsafe short ReadPixelsProc(IntPtr port, PSScaling *scaling, VRect *writeRect, PixelMemoryDesc *destination, VRect *wroteRect)
{
#if DEBUG
DebugUtils.Ping(DebugFlags.ChannelPorts, string.Format("port: {0}, rect: {1}", port.ToString(), DebugUtils.PointerToString(writeRect)));
#endif
if (scaling == null || writeRect == null || destination == null)
{
return(PSError.paramErr);
}
if (destination->depth != 8 && destination->depth != 16)
{
return(PSError.errUnsupportedDepth);
}
// The offsets must be aligned to a System.Byte.
if ((destination->bitOffset % 8) != 0)
{
return(PSError.errUnsupportedBitOffset);
}
if ((destination->colBits % 8) != 0)
{
return(PSError.errUnsupportedColBits);
}
if ((destination->rowBits % 8) != 0)
{
return(PSError.errUnsupportedRowBits);
}
int channel = port.ToInt32();
if (channel < PSConstants.ChannelPorts.Gray || channel > PSConstants.ChannelPorts.SelectionMask)
{
return(PSError.errUnknownPort);
}
VRect srcRect = scaling->sourceRect;
VRect dstRect = scaling->destinationRect;
int srcWidth = srcRect.right - srcRect.left;
int srcHeight = srcRect.bottom - srcRect.top;
int dstWidth = dstRect.right - dstRect.left;
int dstHeight = dstRect.bottom - dstRect.top;
bool isSelection = channel == PSConstants.ChannelPorts.SelectionMask;
SurfaceBase source = filterImageProvider.Source;
if ((source.BitsPerChannel == 8 || isSelection) && destination->depth == 16)
{
return(PSError.errUnsupportedDepthConversion); // converting 8-bit image data to 16-bit is not supported.
}
if (isSelection)
{
if (srcWidth == dstWidth && srcHeight == dstHeight)
{
FillSelectionMask(destination, filterImageProvider.Mask, srcRect);
}
else if (dstWidth < srcWidth || dstHeight < srcHeight) // scale down
{
if ((scaledSelectionMask == null) || scaledSelectionMask.Width != dstWidth || scaledSelectionMask.Height != dstHeight)
{
if (scaledSelectionMask != null)
{
scaledSelectionMask.Dispose();
scaledSelectionMask = null;
}
try
{
scaledSelectionMask = new SurfaceGray8(dstWidth, dstHeight);
scaledSelectionMask.FitSurface(filterImageProvider.Mask);
}
catch (OutOfMemoryException)
{
return(PSError.memFullErr);
}
}
FillSelectionMask(destination, scaledSelectionMask, dstRect);
}
else if (dstWidth > srcWidth || dstHeight > srcHeight) // scale up
{
if ((scaledSelectionMask == null) || scaledSelectionMask.Width != dstWidth || scaledSelectionMask.Height != dstHeight)
{
if (scaledSelectionMask != null)
{
scaledSelectionMask.Dispose();
scaledSelectionMask = null;
}
try
{
scaledSelectionMask = new SurfaceGray8(dstWidth, dstHeight);
scaledSelectionMask.FitSurface(filterImageProvider.Mask);
}
catch (OutOfMemoryException)
{
return(PSError.memFullErr);
}
}
FillSelectionMask(destination, scaledSelectionMask, dstRect);
}
}
else
{
ImageModes mode = imageMode;
if (source.BitsPerChannel == 16 && destination->depth == 8)
{
if (ditheredChannelSurface == null)
{
short err = CreateDitheredChannelPortSurface(source);
if (err != PSError.noErr)
{
return(err);
}
}
mode = ditheredChannelImageMode;
}
if (srcWidth == dstWidth && srcHeight == dstHeight)
{
FillChannelData(channel, destination, ditheredChannelSurface ?? source, srcRect, mode);
}
else if (dstWidth < srcWidth || dstHeight < srcHeight) // scale down
{
if ((scaledChannelSurface == null) || scaledChannelSurface.Width != dstWidth || scaledChannelSurface.Height != dstHeight)
{
if (scaledChannelSurface != null)
{
scaledChannelSurface.Dispose();
scaledChannelSurface = null;
}
try
{
scaledChannelSurface = SurfaceFactory.CreateFromImageMode(dstWidth, dstHeight, mode);
scaledChannelSurface.FitSurface(ditheredChannelSurface ?? source);
}
catch (OutOfMemoryException)
{
return(PSError.memFullErr);
}
}
FillChannelData(channel, destination, scaledChannelSurface, dstRect, mode);
}
else if (dstWidth > srcWidth || dstHeight > srcHeight) // scale up
{
if ((scaledChannelSurface == null) || scaledChannelSurface.Width != dstWidth || scaledChannelSurface.Height != dstHeight)
{
if (scaledChannelSurface != null)
{
scaledChannelSurface.Dispose();
scaledChannelSurface = null;
}
try
{
scaledChannelSurface = SurfaceFactory.CreateFromImageMode(dstWidth, dstHeight, mode);
scaledChannelSurface.FitSurface(ditheredChannelSurface ?? source);
}
catch (OutOfMemoryException)
{
return(PSError.memFullErr);
}
}
FillChannelData(channel, destination, scaledChannelSurface, dstRect, mode);
}
}
if (wroteRect != null)
{
*wroteRect = dstRect;
}
return(PSError.noErr);
}
