RectangleF GetZoomCrop()
{
RectangleF box = SalientBoundingBox();
var bounds = new RectangleF(new PointF(0, 0), ImageSize);
//Clip box to original image bounds
box = PolygonMath.ClipRectangle(box, bounds);
//Crop close
var copySize = PolygonMath.ScaleOutside(box.Size, TargetSize);
//Clip to bounds.
return(PolygonMath.ClipRectangle(PolygonMath.ExpandTo(box, copySize), bounds));
}
protected override RequestedAction LayoutImage(ImageState s)
{
//Only activated if both width and height are specified, and mode=crop.
if (s.settings.Mode != FitMode.Crop || s.settings.Width < 0 || s.settings.Height < 0)
{
return(RequestedAction.None);
}
//Calculate bounding box for all coordinates specified.
double[] focus = NameValueCollectionExtensions.GetList <double>(s.settings, "c.focus", null, 2, 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 44, 48, 52, 56, 60, 64, 68, 72);
if (focus == null)
{
return(RequestedAction.None);
}
RectangleF box = PolygonMath.GetBoundingBox(focus);
var bounds = new RectangleF(new PointF(0, 0), s.originalSize);
//Clip box to original image bounds
box = PolygonMath.ClipRectangle(box, bounds);
var targetSize = new SizeF(s.settings.Width, s.settings.Height);
SizeF copySize;
//Now, we can either crop as closely as possible or as loosely as possible.
if (NameValueCollectionExtensions.Get <bool>(s.settings, "c.zoom", false) && box.Width > 0 && box.Height > 0)
{
//Crop close
copySize = PolygonMath.ScaleOutside(box.Size, targetSize);
}
else
{
//Crop minimally
copySize = PolygonMath.ScaleInside(targetSize, bounds.Size);
//Ensure it's outside the box
if (!PolygonMath.FitsInside(box.Size, copySize))
{
copySize = PolygonMath.ScaleOutside(box.Size, copySize);
}
}
//Clip to bounds.
box = PolygonMath.ClipRectangle(PolygonMath.ExpandTo(box, copySize), bounds);
s.copyRect = box;
///What is the vertical and horizontal aspect ratio different in result pixels?
var padding = PolygonMath.ScaleInside(box.Size, targetSize);
padding = new SizeF(targetSize.Width - padding.Width, targetSize.Height - padding.Height);
//So, if we haven't met the aspect ratio yet, what mode will we pass on?
var finalmode = NameValueCollectionExtensions.Get <FitMode>(s.settings, "c.finalmode", FitMode.Pad);
//Crop off 1 or 2 pixels instead of padding without worrying too much
if (finalmode == FitMode.Pad && padding.Width + padding.Height < 3)
{
finalmode = FitMode.Crop;
}
s.settings.Mode = finalmode;
return(RequestedAction.None);
}
protected override RequestedAction PreRenderImage(ImageState s)
{
//Skip this when we are doing simulations
if (s.destGraphics == null)
{
return(RequestedAction.None);
}
string sf = s.settings["fi.scale"];
if (string.IsNullOrEmpty(sf))
{
return(RequestedAction.None);
}
bool validAlg = false;
FREE_IMAGE_FILTER filter = ParseResizeAlgorithm(sf, FREE_IMAGE_FILTER.FILTER_CATMULLROM, out validAlg);
if (!validAlg)
{
throw new ImageProcessingException("The specified resizing filter '" + sf + "' did not match bicubic, bilinear, box, bspline, catmullrom, or lanczos.");
}
//Set copy attributes
s.copyAttibutes.SetWrapMode(WrapMode.TileFlipXY);
//The minimum dimensions of the temporary bitmap.
SizeF targetSize = PolygonMath.getParallelogramSize(s.layout["image"]);
targetSize = new SizeF((float)Math.Ceiling(targetSize.Width), (float)Math.Ceiling(targetSize.Height));
s.ApplyCropping();
s.EnsurePreRenderBitmap();
//The size of the temporary bitmap.
//We want it larger than the size we'll use on the final copy, so we never upscale it
//- but we also want it as small as possible so processing is fast.
SizeF tempSize = PolygonMath.ScaleOutside(targetSize, s.copyRect.Size);
int tempWidth = (int)Math.Ceiling(tempSize.Width);
int tempHeight = (int)Math.Ceiling(tempSize.Height);
FIBITMAP src = FIBITMAP.Zero;
FIBITMAP midway = FIBITMAP.Zero;
try {
var oldbit = s.preRenderBitmap ?? s.sourceBitmap;
//Crop if needed, Convert, scale, then convert back.
src = FreeImage.CreateFromBitmap(oldbit);
midway = FreeImage.Rescale(src, tempWidth, tempHeight, filter);
FreeImage.UnloadEx(ref src);
//Clear the old pre-rendered image if needed
if (s.preRenderBitmap != null)
{
s.preRenderBitmap.Dispose();
}
//Reassign the pre-rendered image
s.preRenderBitmap = FreeImage.GetBitmap(midway);
s.copyRect = new RectangleF(0, 0, s.preRenderBitmap.Width, s.preRenderBitmap.Height);
FreeImage.UnloadEx(ref midway);
s.preRenderBitmap.MakeTransparent();
} finally {
if (!src.IsNull)
{
FreeImage.UnloadEx(ref src);
}
if (!midway.IsNull)
{
FreeImage.UnloadEx(ref midway);
}
}
return(RequestedAction.Cancel);
}
protected override RequestedAction PreRenderImage(ImageState s)
{
//Skip this when we are doing simulations
if (s.destGraphics == null)
{
return(RequestedAction.None);
}
s.ApplyCropping();
s.EnsurePreRenderBitmap();
//Parse carve algorithm kind
FilterType ftype = s.settings.Get <FilterType>("carve", FilterType.None);
if ("true".Equals(s.settings["carve"], StringComparison.OrdinalIgnoreCase))
{
ftype = FilterType.Prewitt;
}
if (string.IsNullOrEmpty(s.settings["carve"]) && s.settings.Mode == FitMode.Carve)
{
ftype = FilterType.Prewitt;
}
//If we have carve data
CarveDataPlotter carveData = s.Data.ContainsKey(CarveData) ? (s.Data[CarveData] as CarveDataPlotter) : null;
if (carveData != null && ftype == FilterType.None)
{
ftype = FilterType.Prewitt;
}
RectangleF copyRect = s.copyRect;
if (carveData != null)
{
copyRect = new RectangleF(new PointF(0, 0), s.sourceBitmap.Size);
}
if (ftype == FilterType.None)
{
return(RequestedAction.None); //Only override rendering when carving is requested.
}
//The minimum dimensions of the temporary bitmap.
SizeF targetSize = PolygonMath.getParallelogramSize(s.layout["image"]);
targetSize = new SizeF((float)Math.Ceiling(targetSize.Width), (float)Math.Ceiling(targetSize.Height));
//The size of the temporary bitmap.
//We want it larger than the size we'll use on the final copy, so we never upscale it
//- but we also want it as small as possible so processing is fast.
SizeF tempSize = PolygonMath.ScaleOutside(targetSize, copyRect.Size);
int tempWidth = (int)Math.Ceiling(tempSize.Width);
int tempHeight = (int)Math.Ceiling(tempSize.Height);
//The intermediate and seam carved files
string tempFile = Path.GetTempFileName();
string outputTempFile = Path.GetTempFileName();
try {
try {
//Create a temporary bitmap that is 'halfway resized', so we can efficiently perform seam carving.
//Unless it's already been done for us by FreeImageResize or something
if (s.preRenderBitmap != null && (tempWidth - s.preRenderBitmap.Width < 50 && tempHeight - s.preRenderBitmap.Height < 50))
{
s.preRenderBitmap.Save(tempFile, ImageFormat.Bmp);
tempWidth = s.preRenderBitmap.Width;
tempHeight = s.preRenderBitmap.Height;
}
else
{
//Create the temporary bitmap and graphics.
using (Bitmap temp = new Bitmap(tempWidth, tempHeight, PixelFormat.Format32bppArgb))
using (Graphics g = Graphics.FromImage(temp))
using (ImageAttributes ia = new ImageAttributes()) {
//High quality everything
g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;
g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
g.PixelOffsetMode = System.Drawing.Drawing2D.PixelOffsetMode.HighQuality;
g.CompositingQuality = System.Drawing.Drawing2D.CompositingQuality.HighQuality;
g.CompositingMode = CompositingMode.SourceOver;
ia.SetWrapMode(WrapMode.TileFlipXY);
if (s.preRenderBitmap != null)
{
g.DrawImage(s.preRenderBitmap, new Rectangle(0, 0, tempWidth, tempHeight), 0, 0, s.preRenderBitmap.Width, s.preRenderBitmap.Height, GraphicsUnit.Pixel, ia);
}
else
{
g.DrawImage(s.sourceBitmap, new Rectangle(0, 0, tempWidth, tempHeight), copyRect.X, copyRect.Y, copyRect.Width, copyRect.Height, GraphicsUnit.Pixel, ia);
}
g.Flush(FlushIntention.Flush);
//Save
temp.Save(tempFile, ImageFormat.Bmp);
}
}
string maskFile = carveData != null?Path.GetTempFileName() : null;
try {
if (carveData != null)
{
carveData.SaveBitmapAs(maskFile, tempWidth, tempHeight);
}
Size intTargetSize = new Size((int)targetSize.Width, (int)targetSize.Height);
CairJob job = new CairJob();
if (maskFile != null)
{
job.WeightPath = maskFile;
}
job.SourcePath = tempFile;
job.DestPath = outputTempFile;
job.Size = intTargetSize;
job.Filter = ftype;
job.Timeout = Timeout;
cair.CairyIt(job);
} finally {
if (maskFile != null)
{
File.Delete(maskFile);
}
}
} finally {
File.Delete(tempFile);
}
//Dispose old intermediate bitmap first
if (s.preRenderBitmap != null)
{
s.preRenderBitmap.Dispose();
}
//Load the new intermediate file from disk
s.preRenderBitmap = new Bitmap(outputTempFile);
s.preRenderBitmap.MakeTransparent();
//Reset the s.copyRect to match the new bitmap
s.copyRect = new RectangleF(new PointF(0, 0), new SizeF(targetSize.Width, targetSize.Height));
} finally {
File.Delete(outputTempFile);
}
return(RequestedAction.Cancel);
}
