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);
}
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));
}
public override void RenderTo(Resizing.ImageState s)
{
if (string.IsNullOrEmpty(Text))
{
return;
}
string finalText = Text;
if (finalText.IndexOf('#') > -1)
{
Regex r = new Regex("\\#\\{([^}]+)\\}");
finalText = r.Replace(finalText, delegate(Match m){
string val = s.settings[m.Groups[1].Value];
if (val == null)
{
return("");
}
else
{
return(val);
}
});
}
SizeF naturalSize = SizeF.Empty;
SizeF unrotatedSize = SizeF.Empty;
RectangleF bounds = this.CalculateLayerCoordinates(s, delegate(double maxwidth, double maxheight) {
using (Font f = GetFont())
using (StringFormat sf = GetFormat()){
naturalSize = s.destGraphics.MeasureString(finalText, f, new PointF(), sf);
SizeF size = naturalSize;
unrotatedSize = Fill ? PolygonMath.ScaleInside(size, new SizeF((float)maxwidth, (float)maxheight)) : size;
if (Angle != 0)
{
size = PolygonMath.GetBoundingBox(PolygonMath.RotatePoly(PolygonMath.ToPoly(new RectangleF(new PointF(0, 0), size)), Angle)).Size;
}
if (Fill)
{
size = PolygonMath.ScaleInside(size, new SizeF((float)maxwidth, (float)maxheight));
}
f.FontFamily.Dispose();
return(PolygonMath.RoundPoints(size));
}
}, true);
using (Font f = GetFont()) {
s.destGraphics.SmoothingMode = SmoothingMode.HighQuality;
s.destGraphics.TextRenderingHint = Rendering; // Utils.parseEnum<TextRenderingHint>(s.settings["watermark.rendering"], this.Rendering); ;
s.destGraphics.PixelOffsetMode = PixelOffsetMode.HighQuality;
s.destGraphics.InterpolationMode = InterpolationMode.HighQualityBicubic;
s.destGraphics.CompositingMode = CompositingMode.SourceOver;
s.destGraphics.CompositingQuality = CompositingQuality.HighQuality;
s.destGraphics.ResetTransform();
if (Angle != 0)
{
s.destGraphics.RotateTransform((float)Angle);
}
s.destGraphics.ScaleTransform(unrotatedSize.Width / naturalSize.Width, unrotatedSize.Height / naturalSize.Height);
s.destGraphics.TranslateTransform(bounds.X, bounds.Y, MatrixOrder.Append);
using (StringFormat sf = GetFormat()) {
DrawString(s.destGraphics, finalText, f, new Point(0, 0), sf);
}
s.destGraphics.ResetTransform();
f.FontFamily.Dispose();
}
}
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))));
}
internal RectangleF GetCrop()
{
if (Zoom)
{
return(GetZoomCrop());
}
var salientBounds = SalientBoundingBox();
var idealCropSize = PolygonMath.ScaleInside(TargetSize, ImageSize);
var fits = PolygonMath.FitsInside(salientBounds.Size, idealCropSize);
// If there's no need to crop out a salient region, then center on the salient bounding box and align within the image bounds.
if (fits)
{
return(PolygonMath.AlignWithin(new RectangleF(PointF.Empty, idealCropSize),
new RectangleF(PointF.Empty, ImageSize), PolygonMath.Midpoint(salientBounds)));
}
if (NeverCropSalientArea)
{
var compromiseCrop = new SizeF(Math.Max(salientBounds.Width, idealCropSize.Width),
Math.Max(salientBounds.Height, idealCropSize.Height));
// Don't worry about 3 pixels or less, that's just annoying.
if (compromiseCrop.Width - idealCropSize.Width <= 3 &&
compromiseCrop.Height - idealCropSize.Height <= 3)
{
compromiseCrop = idealCropSize;
}
return(PolygonMath.AlignWithin(new RectangleF(PointF.Empty, compromiseCrop),
new RectangleF(PointF.Empty, ImageSize), PolygonMath.Midpoint(salientBounds)));
}
// Find the least bad crop (brute force)
var vertical = salientBounds.Height > idealCropSize.Height;
var choiceCount = vertical
? salientBounds.Height - idealCropSize.Height
: salientBounds.Width - idealCropSize.Width;
var searchArea = new RectangleF(vertical ? 0 : salientBounds.X, vertical ? salientBounds.Y : 0, vertical ? idealCropSize.Width : salientBounds.Width, vertical ? salientBounds.Height : idealCropSize.Height);
var initialWindow = PolygonMath.AlignWith(new RectangleF(PointF.Empty, idealCropSize), searchArea,
ContentAlignment.TopLeft);
double bestVolume = 0;
var bestCrop = initialWindow;
for (var i = 0; i < choiceCount; i++)
{
var window = initialWindow;
window.Offset(vertical ? 0 : i, vertical ? i : 0);
var volume = SalientArea.IntersectVolume(window, Regions);
if (volume > bestVolume)
{
bestVolume = volume;
bestCrop = window;
}
}
return(bestCrop);
}