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); }