private void ApplyResizeSettings(ResizeSettings settings, GhostscriptSettings ghostscriptSettings)
{
// Parse resize settings
// - graphicsAlphaBits
int graphicsAlphaBits = settings.GetValueOrDefault("graphicsbits", 0);
if (!_validAlphaBitValues.Contains(graphicsAlphaBits))
{
// Use default value
graphicsAlphaBits = _validAlphaBitValues.Last();
}
ghostscriptSettings.Add(GhostscriptArgument.GraphicsAlphaBits, graphicsAlphaBits);
// - textAlphaBits
int textAlphaBits = settings.GetValueOrDefault("textbits", 0);
if (!_validAlphaBitValues.Contains(textAlphaBits))
{
// Use default value
textAlphaBits = _validAlphaBitValues.Last();
}
ghostscriptSettings.Add(GhostscriptArgument.TextAlphaBits, textAlphaBits);
ghostscriptSettings[GhostscriptArgument.GridFitTT] = (settings.Get <bool>("gridfit") == true ? 2 : 0).ToString(NumberFormatInfo.InvariantInfo);
ghostscriptSettings[GhostscriptArgument.AlignToPixels] = (settings.Get <bool>("subpixels") == true ? 1 : 0).ToString(NumberFormatInfo.InvariantInfo);
if (settings.Get <bool>("printed", true) == false)
{
ghostscriptSettings.Remove(GhostscriptArgument.Printed);
}
}
/// <summary>
///
/// </summary>
/// <param name="format"></param>
/// <param name="img"></param>
/// <param name="target"></param>
/// <param name="colors"></param>
/// <param name="dither"></param>
/// <param name="fourPass"></param>
/// <param name="ditherPercent"></param>
/// <param name="useGdiQuantization"></param>
public void SaveIndexed(System.Drawing.Imaging.ImageFormat format, Image img, Stream target, byte colors, bool dither, bool fourPass, int ditherPercent)
{
if (PreservePalette && originalPalette != null)
{
img.Palette = originalPalette;
//If we are encoding in PNG, and writing to a non-seekable stream,
//we have to buffer it all in memory or we'll get an exception
if (!target.CanSeek && ImageFormat.Png.Equals(format))
{
using (MemoryStream ms = new MemoryStream(4096)) {
img.Save(ms, format); //Recursive call
ms.WriteTo(target);
}
}
else
{
//Everything else
img.Save(target, format);
}
return;
}
OctreeQuantizer quantizer = new OctreeQuantizer(colors, GetBitsNeededForColorDepth(colors));
if (query.Get <bool>("fulltrust", HasFullTrust))
{
quantizer.Dither = dither;
quantizer.FourPass = fourPass;
quantizer.DitherPercent = (float)ditherPercent / 100;
}
else
{
quantizer.FullTrust = false;
quantizer.OmitFinalStage = true;
quantizer.ResizeForFirstPass = true;
quantizer.FirstPassPixelCount = (long)Math.Pow(query.Get <int>("pixelCount", (int)Math.Sqrt(quantizer.FirstPassPixelCount)), 2);
quantizer.FirstPassPixelThreshold = (long)Math.Pow(query.Get <int>("pixelThreshold", (int)Math.Sqrt(quantizer.FirstPassPixelThreshold)), 2);
}
using (Bitmap quantized = quantizer.Quantize(img)) {
//If we are encoding in PNG, and writing to a non-seekable stream,
//we have to buffer it all in memory or we'll get an exception
if (!target.CanSeek && ImageFormat.Png.Equals(format))
{
using (MemoryStream ms = new MemoryStream(4096)) {
quantized.Save(ms, format); //Recursive call
ms.WriteTo(target);
}
}
else
{
//Everything else
quantized.Save(target, format);
}
}
}
public Bitmap Decode(Stream s, ResizeSettings settings)
{
return((Bitmap)DecodeAndCall(s, settings, delegate(ref FIBITMAP b, bool MayDispose) {
bool usethumb = ("true".Equals(settings["usepreview"], StringComparison.OrdinalIgnoreCase));
bool autorotate = settings.Get <bool>("autorotate", settings.Get <bool>("autorotate.default", false));
return Convert(b, autorotate && !usethumb); //because usepreview prevents autorotate from working at the freeimage level
}));
}
public System.Drawing.Bitmap GetBitmap()
{
Bitmap b = null;
try {
int w = query.Width > 0 ? query.Width : (query.MaxWidth > 0 ? query.MaxWidth : 8);
int h = query.Height > 0 ? query.Height : (query.MaxHeight > 0 ? query.MaxHeight : 8);
float angle = query.Get <float>("angle", 0);
Color c1 = ParseUtils.ParseColor(query["color1"], Color.White);
Color c2 = ParseUtils.ParseColor(query["color2"], Color.Black);
b = new Bitmap(w, h);
using (Graphics g = Graphics.FromImage(b))
using (Brush brush = new System.Drawing.Drawing2D.LinearGradientBrush(new Rectangle(0, 0, w, h), c1, c2, angle)){
g.FillRectangle(brush, 0, 0, w, h);
}
} catch {
if (b != null)
{
b.Dispose();
}
throw;
}
return(b);
}
public WicEncoderPlugin(ResizeSettings settings, object original) : base(settings, original)
{
Dither = true;
Subsampling = settings["subsampling"];
this.Colors = -1;
//Parse colors
int colors = -1;
if (!string.IsNullOrEmpty(settings["colors"]))
{
if (int.TryParse(settings["colors"], out colors))
{
this.Colors = colors;
}
}
if ("false".Equals(settings["dither"], StringComparison.OrdinalIgnoreCase) ||
"0".Equals(settings["dither"], StringComparison.OrdinalIgnoreCase))
{
Dither = false;
}
Interlace = settings.Get <bool>("interlace");
}
private PdfRenderFlags BuildFlags(ResizeSettings settings)
{
var flags = PdfRenderFlags.None;
if (settings.Get <bool>("annotations").GetValueOrDefault())
{
flags |= PdfRenderFlags.Annotations;
}
if (settings.Get <bool>("lcd").GetValueOrDefault())
{
flags |= PdfRenderFlags.LcdText;
}
if (settings.Get <bool>("grayscale").GetValueOrDefault())
{
flags |= PdfRenderFlags.Grayscale;
}
if (settings.Get <bool>("halftone").GetValueOrDefault())
{
flags |= PdfRenderFlags.ForceHalftone;
}
if (settings.Get <bool>("print").GetValueOrDefault())
{
flags |= PdfRenderFlags.ForPrinting;
}
if (settings.Get <bool>("transparent").GetValueOrDefault())
{
flags |= PdfRenderFlags.Transparent;
}
return(flags);
}
public PrettyGifs(ResizeSettings settings, object original)
{
this.query = new ResizeSettings(settings);
ResizeSettings q = settings;
//Parse output format
OutputFormat = GetFormatIfSuitable(settings, original);
//Parse colors
int colors = -1;
if (!string.IsNullOrEmpty(q["colors"]))
{
if (int.TryParse(q["colors"], NumberStyles.Integer, NumberFormatInfo.InvariantInfo, out colors))
{
this.Colors = colors;
}
}
//Parse dither settings
if (!string.IsNullOrEmpty(q["dither"]))
{
if ("true".Equals(q["dither"], StringComparison.OrdinalIgnoreCase))
{
this.Dither = true;
}
else if ("4pass".Equals(q["dither"], StringComparison.OrdinalIgnoreCase))
{
this.FourPassDither = true;
}
else
{
int dither;
if (int.TryParse(q["dither"], NumberStyles.Integer, NumberFormatInfo.InvariantInfo, out dither))
{
DitherPercent = dither;
Dither = true;
}
}
}
PreservePalette = q.Get <bool>("preservePalette", PreservePalette);
if (PreservePalette && original is Image && ((Image)original).Palette.Entries.Length > 0)
{
originalPalette = ((Image)original).Palette;
}
}
public WicEncoderPlugin(ResizeSettings settings, object original)
: base(settings,original)
{
Dither = true;
Subsampling = settings["subsampling"];
this.Colors = -1;
//Parse colors
int colors = -1;
if (!string.IsNullOrEmpty(settings["colors"]))
if (int.TryParse(settings["colors"], out colors))
this.Colors = colors;
if ("false".Equals(settings["dither"], StringComparison.OrdinalIgnoreCase) ||
"0".Equals(settings["dither"], StringComparison.OrdinalIgnoreCase)) Dither = false;
Interlace = settings.Get<bool>("interlace");
}
public IEncoder CreateIfSuitable(ResizeSettings settings, object original)
{
var forcedFormat = !string.IsNullOrEmpty(settings.Format);
var shouldEncode = forcedFormat ? _extensions.Contains(settings.Format) : _extensions.Contains(GetExtension(original));
if (shouldEncode)
{
var quality = settings.Get <int>("quality");
if (quality.HasValue)
{
return(new MozJpegPlugin(quality.Value));
}
return(new MozJpegPlugin());
}
return(null);
}
private static object ToneMap(ref FIBITMAP b, bool mayUnloadOriginal, ResizeSettings settings, DecodeCallback callback)
{
return(callback(ref b, mayUnloadOriginal));//Tone mapping is disabled, not yet functional
FIBITMAP m = FIBITMAP.Zero;
try {
var alg = settings.Get <ToneMappingAlgorithm>("fi.tonemap", ToneMappingAlgorithm.None);
if (alg == ToneMappingAlgorithm.Drago)
{
m = FreeImage.TmoDrago03(b, 2.2, 0);
}
else if (alg == ToneMappingAlgorithm.Reinhard)
{
m = FreeImage.TmoReinhard05(b, 0, 0);
}
else if (alg == ToneMappingAlgorithm.Fattal)
{
m = FreeImage.TmoFattal02(b, 0.5, 0.85);
}
else
{
return(callback(ref b, mayUnloadOriginal));
}
if (mayUnloadOriginal)
{
FreeImage.UnloadEx(ref b);
}
return(callback(ref m, true));
} finally {
if (!m.IsNull)
{
FreeImage.UnloadEx(ref m);
}
}
}
public void ApplySettings(ResizeSettings settings)
{
copyRect = determineManualCropWindow(settings);
//Save the manual crop size.
SizeF manualCropSize = copyRect.Size;
RectangleF manualCropRect = copyRect;
FitMode fit = determineFitMode(settings);
//Aspect ratio of the image
double imageRatio = copyRect.Width / copyRect.Height;
//Zoom factor
double zoom = settings.Get <double>("zoom", 1);
//The target size for the image
targetSize = new SizeF(-1, -1);
//Target area for the image
areaSize = new SizeF(-1, -1);
//If any dimensions are specified, calculate. Otherwise, use original image dimensions
if (settings.Width != -1 || settings.Height != -1 || settings.MaxHeight != -1 || settings.MaxWidth != -1)
{
//A dimension was specified.
//We first calculate the largest size the image can be under the width/height/maxwidth/maxheight restriction
//- pretending stretch=fill and scale=both
//Temp vars - results stored in targetSize and areaSize
double width = settings.Width;
double height = settings.Height;
double maxwidth = settings.MaxWidth;
double maxheight = settings.MaxHeight;
//Eliminate cases where both a value and a max value are specified: use the smaller value for the width/height
if (maxwidth > 0 && width > 0)
{
width = Math.Min(maxwidth, width); maxwidth = -1;
}
if (maxheight > 0 && height > 0)
{
height = Math.Min(maxheight, height); maxheight = -1;
}
//Handle cases of width/maxheight and height/maxwidth as in legacy version
if (width != -1 && maxheight != -1)
{
maxheight = Math.Min(maxheight, (width / imageRatio));
}
if (height != -1 && maxwidth != -1)
{
maxwidth = Math.Min(maxwidth, (height * imageRatio));
}
//Move max values to width/height. FitMode should already reflect the mode we are using, and we've already resolved mixed modes above.
width = Math.Max(width, maxwidth);
height = Math.Max(height, maxheight);
//Calculate missing value (a missing value is handled the same everywhere).
if (width > 0 && height <= 0)
{
height = width / imageRatio;
}
else if (height > 0 && width <= 0)
{
width = height * imageRatio;
}
//We now have width & height, our target size. It will only be a different aspect ratio from the image if both 'width' and 'height' are specified.
//FitMode.Max
if (fit == FitMode.Max)
{
areaSize = targetSize = PolygonMath.ScaleInside(manualCropSize, new SizeF((float)width, (float)height));
//FitMode.Pad
}
else if (fit == FitMode.Pad)
{
areaSize = new SizeF((float)width, (float)height);
targetSize = PolygonMath.ScaleInside(manualCropSize, areaSize);
//FitMode.crop
}
else if (fit == FitMode.Crop)
{
//We autocrop - so both target and area match the requested size
areaSize = targetSize = new SizeF((float)width, (float)height);
RectangleF copyRect;
ScaleMode scale = settings.Scale;
bool cropWidthSmaller = manualCropSize.Width <= (float)width;
bool cropHeightSmaller = manualCropSize.Height <= (float)height;
//TODO: consider mode=crop;fit=upscale
// With both DownscaleOnly (where only one dimension is smaller than
// requested) and UpscaleCanvas, we will have a targetSize based on the
// minWidth & minHeight.
// TODO: what happens if mode=crop;scale=down but the target is larger than the source?
if ((scale == ScaleMode.DownscaleOnly && (cropWidthSmaller != cropHeightSmaller)) ||
(scale == ScaleMode.UpscaleCanvas && (cropHeightSmaller || cropWidthSmaller)))
{
var minWidth = Math.Min(manualCropSize.Width, (float)width);
var minHeight = Math.Min(manualCropSize.Height, (float)height);
targetSize = new SizeF(minWidth, minHeight);
copyRect = manualCropRect = new RectangleF(0, 0, minWidth, minHeight);
// For DownscaleOnly, the areaSize is adjusted to the new targetSize as well.
if (scale == ScaleMode.DownscaleOnly)
{
areaSize = targetSize;
}
}
else
{
//Determine the size of the area we are copying
Size sourceSize = PolygonMath.RoundPoints(PolygonMath.ScaleInside(areaSize, manualCropSize));
//Center the portion we are copying within the manualCropSize
copyRect = new RectangleF(0, 0, sourceSize.Width, sourceSize.Height);
}
// Align the actual source-copy rectangle inside the available
// space based on the anchor.
this.copyRect = PolygonMath.ToRectangle(PolygonMath.AlignWith(copyRect, this.copyRect, settings.Anchor));
}
else
{ //Stretch and carve both act like stretching, so do that:
areaSize = targetSize = new SizeF((float)width, (float)height);
}
}
else
{
//No dimensions specified, no fit mode needed. Use manual crop dimensions
areaSize = targetSize = manualCropSize;
}
//Multiply both areaSize and targetSize by zoom.
areaSize.Width *= (float)zoom;
areaSize.Height *= (float)zoom;
targetSize.Width *= (float)zoom;
targetSize.Height *= (float)zoom;
//Todo: automatic crop is permitted to break the scaling rule Fix!!
//Now do upscale/downscale check If they take effect, set targetSize to imageSize
if (settings.Scale == ScaleMode.DownscaleOnly)
{
if (PolygonMath.FitsInside(manualCropSize, targetSize))
{
//The image is smaller or equal to its target polygon. Use original image coordinates instead.
areaSize = targetSize = manualCropSize;
copyRect = manualCropRect;
}
}
else if (settings.Scale == ScaleMode.UpscaleOnly)
{
if (!PolygonMath.FitsInside(manualCropSize, targetSize))
{
//The image is larger than its target. Use original image coordinates instead
areaSize = targetSize = manualCropSize;
copyRect = manualCropRect;
}
}
else if (settings.Scale == ScaleMode.UpscaleCanvas)
{
//Same as downscaleonly, except areaSize isn't changed.
if (PolygonMath.FitsInside(manualCropSize, targetSize))
{
//The image is smaller or equal to its target polygon.
//Use manual copy rect/size instead.
targetSize = manualCropSize;
copyRect = manualCropRect;
}
}
//May 12: require max dimension and round values to minimize rounding differences later.
areaSize.Width = Math.Max(1, (float)Math.Round(areaSize.Width));
areaSize.Height = Math.Max(1, (float)Math.Round(areaSize.Height));
targetSize.Width = Math.Max(1, (float)Math.Round(targetSize.Width));
targetSize.Height = Math.Max(1, (float)Math.Round(targetSize.Height));
}
private Size GetOutputSize(ResizeSettings settings, double boundingWidth, double boundingHeight)
{
// Output size is determined by resize settings, if available.
// maxwidth, maxheight
// – Fit the image within the specified bounds, preserving aspect ratio.
// width, height
// – Force the final width and/or height to certain dimensions.
// Whitespace will be added if the aspect ratio is different.
// This plugin renders to a size within the requested size and then expects remaining plugins in the
// pipeline to perform and additional processing such as adding whitespace, etc.
// It can safely treat width/height as maxwidth/maxheight.
double imageRatio = boundingWidth / boundingHeight;
double width = settings.Width;
double height = settings.Height;
double maxwidth = settings.MaxWidth;
double maxheight = settings.MaxHeight;
//Allow overrides with pdfwidth and pdfheight when we *want* to rescale afterwards.
int pw = settings.Get("pdfwidth", -1);
int ph = settings.Get("pdfheight", -1);
if (pw > 0)
{
width = pw; maxwidth = -1;
}
if (ph > 0)
{
height = ph; maxheight = -1;
}
//Handle cases of width/maxheight and height/maxwidth as in legacy versions.
if (width != -1 && maxheight != -1)
{
maxheight = Math.Min(maxheight, (width / imageRatio));
}
if (height != -1 && maxwidth != -1)
{
maxwidth = Math.Min(maxwidth, (height * imageRatio));
}
//Eliminate cases where both a value and a max value are specified: use the smaller value for the width/height
if (maxwidth > 0 && width > 0)
{
width = Math.Min(maxwidth, width); maxwidth = -1;
}
if (maxheight > 0 && height > 0)
{
height = Math.Min(maxheight, height); maxheight = -1;
}
//Move values to width/height
if (width <= 0)
{
width = maxwidth;
}
if (height <= 0)
{
height = maxheight;
}
//Calculate missing value(s)
if (width > 0 && height <= 0)
{
height = width / imageRatio;
}
else if (height > 0 && width <= 0)
{
width = height * imageRatio;
}
else if (width <= 0 && height <= 0)
{ // If neither width nor height as specified use default values
width = DefaultWidth;
height = DefaultHeight;
}
// Limit maximum output size
width = Math.Min(width, this.MaxWidth);
height = Math.Min(height, this.MaxHeight);
// Determine the scaling values, and use the smallest to ensure we fit in the bounding box without changing
// the aspect ratio otherwise we will crop.
//Use a scaled version of boundingBox inside our maximum width and height constraints.
return(PolygonMath.RoundPoints(PolygonMath.ScaleInside(new SizeF((float)boundingWidth, (float)boundingHeight), new SizeF((float)width, (float)height))));
}
private Size GetOutputSize(ResizeSettings settings, double boundingWidth, double boundingHeight)
{
// Output size is determined by resize settings, if available.
// maxwidth, maxheight
// – Fit the image within the specified bounds, preserving aspect ratio.
// width, height
// – Force the final width and/or height to certain dimensions.
// Whitespace will be added if the aspect ratio is different.
// This plugin renders to a size within the requested size and then expects remaining plugins in the
// pipeline to perform and additional processing such as adding whitespace, etc.
// It can safely treat width/height as maxwidth/maxheight.
double imageRatio = boundingWidth / boundingHeight;
double width = settings.Width;
double height = settings.Height;
double maxwidth = settings.MaxWidth;
double maxheight = settings.MaxHeight;
//Allow overrides with pdfwidth and pdfheight when we *want* to rescale afterwards.
int pw = settings.Get<int>("pdfwidth", -1);
int ph = settings.Get<int>("pdfheight", -1);
if (pw > 0) { width = pw; maxwidth = -1;}
if (ph > 0) { height = ph; maxheight = -1; }
//Handle cases of width/maxheight and height/maxwidth as in legacy versions.
if (width != -1 && maxheight != -1) maxheight = Math.Min(maxheight, (width / imageRatio));
if (height != -1 && maxwidth != -1) maxwidth = Math.Min(maxwidth, (height * imageRatio));
//Eliminate cases where both a value and a max value are specified: use the smaller value for the width/height
if (maxwidth > 0 && width > 0) { width = Math.Min(maxwidth, width); maxwidth = -1; }
if (maxheight > 0 && height > 0) { height = Math.Min(maxheight, height); maxheight = -1; }
//Move values to width/height
if (width <= 0) width = maxwidth;
if (height <= 0) height = maxheight;
//Calculate missing value(s)
if (width > 0 && height <= 0) height = width / imageRatio;
else if (height > 0 && width <= 0) width = height * imageRatio;
else if(width <= 0 && height <= 0) { // If neither width nor height as specified use default values
width = DefaultWidth;
height = DefaultHeight;
}
// Limit maximum output size
width = Math.Min(width, this.MaxWidth);
height = Math.Min(height, this.MaxHeight);
// Determine the scaling values, and use the smallest to ensure we fit in the bounding box without changing
// the aspect ratio otherwise we will crop.
//Use a scaled version of boundingBox inside our maximum width and height constraints.
return PolygonMath.RoundPoints(PolygonMath.ScaleInside(new SizeF((float)boundingWidth, (float)boundingHeight), new SizeF((float)width, (float)height)));
}
private void ApplyResizeSettings(ResizeSettings settings, GhostscriptSettings ghostscriptSettings)
{
// Parse resize settings
// - graphicsAlphaBits
int graphicsAlphaBits = settings.GetValueOrDefault("graphicsbits", 0);
if(!_validAlphaBitValues.Contains(graphicsAlphaBits))
{
// Use default value
graphicsAlphaBits = _validAlphaBitValues.Last();
}
ghostscriptSettings.Add(GhostscriptArgument.GraphicsAlphaBits, graphicsAlphaBits);
// - textAlphaBits
int textAlphaBits = settings.GetValueOrDefault("textbits", 0);
if(!_validAlphaBitValues.Contains(textAlphaBits))
{
// Use default value
textAlphaBits = _validAlphaBitValues.Last();
}
ghostscriptSettings.Add(GhostscriptArgument.TextAlphaBits, textAlphaBits);
ghostscriptSettings[GhostscriptArgument.GridFitTT] = (settings.Get<bool>("gridfit") == true ? 2 : 0).ToString(NumberFormatInfo.InvariantInfo);
ghostscriptSettings[GhostscriptArgument.AlignToPixels] = (settings.Get<bool>("subpixels") == true ? 1 : 0).ToString(NumberFormatInfo.InvariantInfo);
if (settings.Get<bool>("printed",true) == false) ghostscriptSettings.Remove(GhostscriptArgument.Printed);
}
protected override RequestedAction BuildJob(ImageJob job)
{
if (!"wpf".Equals(job.Settings["builder"]))
{
return(RequestedAction.None);
}
// Estrazione delle ResizeSettings
ResizeSettings settings = job.Settings;
Stream s = null;
bool disposeStream = !(job.Source is Stream);
long originalPosition = 0;
bool restoreStreamPosition = false;
string path;
s = c.CurrentImageBuilder.GetStreamFromSource(job.Source, job.Settings, ref disposeStream, out path, out restoreStreamPosition);
if (s == null)
{
return(RequestedAction.None); //We don't support the source object!
}
if (job.ResetSourceStream)
{
restoreStreamPosition = true;
}
job.SourcePathData = path;
// Instanzio uno stream locale per le operazioni WPF
using (MemoryStream localStream = (s is MemoryStream) ? (MemoryStream)s : StreamExtensions.CopyToMemoryStream(s))
{
if (s != null && restoreStreamPosition && s.CanSeek)
{
s.Seek(originalPosition, SeekOrigin.Begin);
}
if (disposeStream)
{
s.Dispose();
}
/* ? ? ? */
IEncoder managedEncoder = c.Plugins.GetEncoder(job.Settings, job.SourcePathData);
bool supportsTransparency = managedEncoder.SupportsTransparency;
// Recupero le dimensioni originali
var frame = BitmapFrame.Create(StreamExtensions.CopyToMemoryStream(localStream));
System.Windows.Size originalSize = new System.Windows.Size(frame.PixelWidth, frame.PixelHeight);
// Resetto lo stream locale alla posizione iniziale, dopo aver letto i metadata
localStream.Position = 0;
// Uhm... sono costretto a referenziare le System.Drawing (GDI) per questo,
// TODO: chiedere al tipo se si può prevedere un costruttore di ImageState che non preveda un System.Drawing.Size come parametro
System.Drawing.Size orig = new System.Drawing.Size((int)originalSize.Width, (int)originalSize.Height);
using (ImageState imageState = new ImageState(settings, orig, true))
{
c.CurrentImageBuilder.Process(imageState);
Rectangle imageDest = PolygonMath.ToRectangle(PolygonMath.GetBoundingBox(imageState.layout["image"]));
BitmapSource finalImage;
BitmapImage bi = new BitmapImage();
bi.CacheOption = BitmapCacheOption.OnLoad;
bi.BeginInit();
bi.StreamSource = localStream;
WpfImageSettings wpfImageSettings = imageState.WpfDestinationImageSettings(settings);
bi.DecodePixelWidth = Convert.ToInt32(wpfImageSettings.DestinationImageWidth);
bi.DecodePixelHeight = Convert.ToInt32(wpfImageSettings.DestinationImageHeight);
bi.EndInit();
// Creation of the encoder
WpfEncoderPlugin wpfEncoder = new WpfEncoderPlugin(settings, job.SourcePathData);
RenderTargetBitmap final = new RenderTargetBitmap(imageState.finalSize.Width, imageState.finalSize.Height, settings.Get <int>("dpi", 96), settings.Get <int>("dpi", 96), PixelFormats.Default);
DrawingVisual dv = new DrawingVisual();
using (DrawingContext dc = dv.RenderOpen())
{
string ARGBBackgroundColor = String.Format("#{0:X2}{1:X2}{2:X2}{3:X2}", wpfEncoder.MimeType.Equals("image/jpeg") ? 255 : settings.BackgroundColor.A,
settings.BackgroundColor.R,
settings.BackgroundColor.G,
settings.BackgroundColor.B);
System.Windows.Media.Brush BrushBackgroundColor = new System.Windows.Media.SolidColorBrush((System.Windows.Media.Color)System.Windows.Media.ColorConverter.ConvertFromString(ARGBBackgroundColor));
/* todo: verificare */
dc.DrawRectangle(BrushBackgroundColor, null, new Rect(0, 0, wpfImageSettings.DestinationImageWidth, wpfImageSettings.DestinationImageHeight));
Rect rect = new Rect(wpfImageSettings.OffsetX, wpfImageSettings.OffsetY, wpfImageSettings.DestinationImageWidth, wpfImageSettings.DestinationImageHeight);
//dc.PushTransform(new RotateTransform(settings.Rotate, (double)imageState.finalSize.Width / 2, (double)imageState.finalSize.Height / 2));
dc.DrawImage(bi, rect);
}
final.Render(dv);
finalImage = final;
// Write the image to the output stream
wpfEncoder.Write(finalImage, (Stream)job.Dest);
}
}
return(RequestedAction.None);
}
/// <summary>
/// Build a layout for the source image given the resize settings
/// </summary>
/// <param name="imageSourceSize"></param>
/// <param name="resizeSettings"></param>
public ImageLayout BuildLayout(Size imageSourceSize, ResizeSettings resizeSettings)
{
// by default, we are taking the entire image
var sourceRectangle = new RectangleF(new PointF(0, 0), imageSourceSize);
var fit = resizeSettings.Mode;
// determine fit mode to use if both vertical and horizontal limits are used.
if (fit == FitMode.None)
{
if (resizeSettings.Width != -1 || resizeSettings.Height != -1)
{
// we specified both width and height
// we are looking for exact width and height then
// use pad to ensure height and width but ensure aspect ratio
// by adding padding where needed
fit = FitMode.Pad;
}
else
{
fit = FitMode.Max;
}
}
// Aspect source ratio of the image
var imageRatio = sourceRectangle.Size.Width / sourceRectangle.Size.Height;
// zoom factor
var zoom = resizeSettings.Get<double>("zoom", 1);
// The target size for the image
var imageSize = new SizeF(-1, -1);
// Target canvas size for the image
var canvasSize = new SizeF(-1, -1);
//If any dimensions are specified, calculate. Otherwise, use original image dimensions
if (resizeSettings.Width != -1 || resizeSettings.Height != -1 || resizeSettings.MaxHeight != -1 || resizeSettings.MaxWidth != -1)
{
// a dimension was specified.
// we first calculate the largest size the image can be under the width/height/maxwidth/maxheight restrictions.
// pretending stretch=fill and scale=both
// temp vars - results stored in targetSize and areaSize
double width = resizeSettings.Width;
double height = resizeSettings.Height;
double maxwidth = resizeSettings.MaxWidth;
double maxheight = resizeSettings.MaxHeight;
// eliminate cases where both a value and a max value are specified: use the smaller value for the width/height
if (maxwidth > 0 && width > 0) { width = Math.Min(maxwidth, width); maxwidth = -1; }
if (maxheight > 0 && height > 0) { height = Math.Min(maxheight, height); maxheight = -1; }
// handle cases of width/maxheight and height/maxwidth.
if (width != -1 && maxheight != -1) maxheight = Math.Min(maxheight, (width / imageRatio));
if (height != -1 && maxwidth != -1) maxwidth = Math.Min(maxwidth, (height * imageRatio));
//Move max values to width/height. FitMode should already reflect the mode we are using, and we've already resolved mixed modes above.
width = Math.Max(width, maxwidth);
height = Math.Max(height, maxheight);
// calculate missing value (a missing value is handled the same everywhere).
if (width > 0 && height <= 0)
height = width / imageRatio;
else if (height > 0 && width <= 0)
width = height * imageRatio;
// we now have width & height, our target size. It will only be a different aspect ratio from the image if both 'width' and 'height' are specified.
if (fit == FitMode.Max)
{
canvasSize = imageSize = PolygonMath.ScaleInside(sourceRectangle.Size, new SizeF((float)width, (float)height));
}
else if (fit == FitMode.Pad)
{
canvasSize = new SizeF((float)width, (float)height);
imageSize = PolygonMath.ScaleInside(sourceRectangle.Size, canvasSize);
}
else if (fit == FitMode.Crop)
{
canvasSize = new SizeF((float)width, (float)height);
imageSize = PolygonMath.RoundPoints(PolygonMath.ScaleOutside(canvasSize, sourceRectangle.Size));
}
else
{
// stretch
canvasSize = imageSize = new SizeF((float)width, (float)height);
}
}
else
{
// no dimensions specified, no fit mode needed.
canvasSize = imageSize = sourceRectangle.Size;
}
//Multiply both areaSize and targetSize by zoom.
canvasSize.Width *= (float)zoom;
canvasSize.Height *= (float)zoom;
imageSize.Width *= (float)zoom;
imageSize.Height *= (float)zoom;
// NOTE: automatic crop is permitted to break the scaling rules.
//Now do upscale/downscale checks. If they take effect, set targetSize to imageSize
if (resizeSettings.Scale == ScaleMode.DownscaleOnly)
{
if (PolygonMath.FitsInside(sourceRectangle.Size, imageSize))
{
// the image is smaller or equal to its target polygon. Use original image coordinates instead.
canvasSize = imageSize = sourceRectangle.Size;
}
}
else if (resizeSettings.Scale == ScaleMode.UpscaleOnly)
{
if (!PolygonMath.FitsInside(sourceRectangle.Size, imageSize))
{
// the image is larger than its target. Use original image coordintes instead
canvasSize = imageSize = sourceRectangle.Size;
}
}
else if (resizeSettings.Scale == ScaleMode.UpscaleCanvas)
{
// same as downscaleonly, except areaSize isn't changed.
if (PolygonMath.FitsInside(sourceRectangle.Size, imageSize))
{
//The image is smaller or equal to its target polygon.
imageSize = sourceRectangle.Size;
}
}
// require max dimension and round values to minimize rounding differences.
canvasSize.Width = Math.Max(1, (float)Math.Round(canvasSize.Width));
canvasSize.Height = Math.Max(1, (float)Math.Round(canvasSize.Height));
imageSize.Width = Math.Max(1, (float)Math.Round(imageSize.Width));
imageSize.Height = Math.Max(1, (float)Math.Round(imageSize.Height));
//Translate and scale all existing rings
var image = PolygonMath.ToPoly(new RectangleF(new PointF(0, 0), imageSize));
var imageArea = PolygonMath.ToPoly(new RectangleF(new PointF(0, 0), canvasSize));
// center canvas around the image
image = PolygonMath.AlignWith(image, imageArea, resizeSettings.Anchor);
return new ImageLayout(PolygonMath.GetBoundingBox(image), canvasSize);
}