/// <summary>Scale the image to an absolute size.</summary>
/// <remarks>
/// Scale the image to an absolute size. This method will preserve the
/// width-height ratio of the image.
/// </remarks>
/// <param name="fitWidth">the new maximum width of the image</param>
/// <param name="fitHeight">the new maximum height of the image</param>
/// <returns>this element</returns>
public virtual iText.Layout.Element.Image ScaleToFit(float fitWidth, float fitHeight)
{
float horizontalScaling = fitWidth / xObject.GetWidth();
float verticalScaling = fitHeight / xObject.GetHeight();
return(Scale(Math.Min(horizontalScaling, verticalScaling), Math.Min(horizontalScaling, verticalScaling)));
}
public override LayoutResult Layout(LayoutContext layoutContext)
{
LayoutArea area = layoutContext.GetArea().Clone();
Rectangle layoutBox = area.GetBBox();
ApplyMargins(layoutBox, false);
occupiedArea = new LayoutArea(area.GetPageNumber(), new Rectangle(layoutBox.GetX(), layoutBox.GetY() + layoutBox
.GetHeight(), 0, 0));
width = RetrieveWidth(layoutBox.GetWidth());
float? angle = this.GetPropertyAsFloat(Property.ROTATION_ANGLE);
PdfXObject xObject = ((Image)(GetModelElement())).GetXObject();
imageWidth = xObject.GetWidth();
imageHeight = xObject.GetHeight();
width = width == null ? imageWidth : width;
height = (float)width / imageWidth * imageHeight;
fixedXPosition = this.GetPropertyAsFloat(Property.X);
fixedYPosition = this.GetPropertyAsFloat(Property.Y);
float? horizontalScaling = this.GetPropertyAsFloat(Property.HORIZONTAL_SCALING, 1f);
float? verticalScaling = this.GetPropertyAsFloat(Property.VERTICAL_SCALING, 1f);
AffineTransform t = new AffineTransform();
if (xObject is PdfFormXObject && width != imageWidth)
{
horizontalScaling *= width / imageWidth;
verticalScaling *= height / imageHeight;
}
if (horizontalScaling != 1)
{
if (xObject is PdfFormXObject)
{
t.Scale((float)horizontalScaling, 1);
}
width *= (float)horizontalScaling;
}
if (verticalScaling != 1)
{
if (xObject is PdfFormXObject)
{
t.Scale(1, (float)verticalScaling);
}
height *= (float)verticalScaling;
}
float imageItselfScaledWidth = (float)width;
float imageItselfScaledHeight = (float)height;
// See in adjustPositionAfterRotation why angle = 0 is necessary
if (null == angle)
{
angle = 0f;
}
t.Rotate((float)angle);
float scaleCoef = AdjustPositionAfterRotation((float)angle, layoutBox.GetWidth(), layoutBox.GetHeight());
imageItselfScaledHeight *= scaleCoef;
imageItselfScaledWidth *= scaleCoef;
if (xObject is PdfFormXObject)
{
t.Scale(scaleCoef, scaleCoef);
}
GetMatrix(t, imageItselfScaledWidth, imageItselfScaledHeight);
// indicates whether the placement is forced
bool isPlacingForced = false;
if (width > layoutBox.GetWidth() || height > layoutBox.GetHeight())
{
if (true.Equals(GetPropertyAsBoolean(Property.FORCED_PLACEMENT)))
{
isPlacingForced = true;
}
else
{
return(new LayoutResult(LayoutResult.NOTHING, occupiedArea, null, this, this));
}
}
occupiedArea.GetBBox().MoveDown(height);
occupiedArea.GetBBox().SetHeight(height);
occupiedArea.GetBBox().SetWidth((float)width);
float leftMargin = (float)this.GetPropertyAsFloat(Property.MARGIN_LEFT);
float topMargin = (float)this.GetPropertyAsFloat(Property.MARGIN_TOP);
if (leftMargin != 0 || topMargin != 0)
{
TranslateImage(leftMargin, topMargin, t);
GetMatrix(t, imageItselfScaledWidth, imageItselfScaledHeight);
}
ApplyMargins(occupiedArea.GetBBox(), true);
return(new LayoutResult(LayoutResult.FULL, occupiedArea, null, null, isPlacingForced ? this : null));
}
protected internal override void DoDraw(SvgDrawContext context)
{
ResourceResolver resourceResolver = context.GetResourceResolver();
if (resourceResolver == null || this.attributesAndStyles == null)
{
return;
}
String uri = this.attributesAndStyles.Get(SvgConstants.Attributes.XLINK_HREF);
PdfXObject xObject = resourceResolver.RetrieveImageExtended(uri);
if (xObject == null)
{
return;
}
PdfCanvas currentCanvas = context.GetCurrentCanvas();
float x = 0;
if (attributesAndStyles.ContainsKey(SvgConstants.Attributes.X))
{
x = CssUtils.ParseAbsoluteLength(attributesAndStyles.Get(SvgConstants.Attributes.X));
}
float y = 0;
if (attributesAndStyles.ContainsKey(SvgConstants.Attributes.Y))
{
y = CssUtils.ParseAbsoluteLength(attributesAndStyles.Get(SvgConstants.Attributes.Y));
}
float width = 0;
if (attributesAndStyles.ContainsKey(SvgConstants.Attributes.WIDTH))
{
width = CssUtils.ParseAbsoluteLength(attributesAndStyles.Get(SvgConstants.Attributes.WIDTH));
}
float height = 0;
if (attributesAndStyles.ContainsKey(SvgConstants.Attributes.HEIGHT))
{
height = CssUtils.ParseAbsoluteLength(attributesAndStyles.Get(SvgConstants.Attributes.HEIGHT));
}
String preserveAspectRatio = "";
if (attributesAndStyles.ContainsKey(SvgConstants.Attributes.PRESERVE_ASPECT_RATIO))
{
preserveAspectRatio = attributesAndStyles.Get(SvgConstants.Attributes.PRESERVE_ASPECT_RATIO);
}
preserveAspectRatio = preserveAspectRatio.ToLowerInvariant();
if (!SvgConstants.Values.NONE.Equals(preserveAspectRatio) && !(width == 0 || height == 0))
{
float normalizedWidth;
float normalizedHeight;
if (xObject.GetWidth() / width > xObject.GetHeight() / height)
{
normalizedWidth = width;
normalizedHeight = xObject.GetHeight() / xObject.GetWidth() * width;
}
else
{
normalizedWidth = xObject.GetWidth() / xObject.GetHeight() * height;
normalizedHeight = height;
}
switch (preserveAspectRatio.ToLowerInvariant())
{
case SvgConstants.Values.XMIN_YMIN: {
break;
}
case SvgConstants.Values.XMIN_YMID: {
y += Math.Abs(normalizedHeight - height) / 2;
break;
}
case SvgConstants.Values.XMIN_YMAX: {
y += Math.Abs(normalizedHeight - height);
break;
}
case SvgConstants.Values.XMID_YMIN: {
x += Math.Abs(normalizedWidth - width) / 2;
break;
}
case SvgConstants.Values.XMID_YMAX: {
x += Math.Abs(normalizedWidth - width) / 2;
y += Math.Abs(normalizedHeight - height);
break;
}
case SvgConstants.Values.XMAX_YMIN: {
x += Math.Abs(normalizedWidth - width);
break;
}
case SvgConstants.Values.XMAX_YMID: {
x += Math.Abs(normalizedWidth - width);
y += Math.Abs(normalizedHeight - height) / 2;
break;
}
case SvgConstants.Values.XMAX_YMAX: {
x += Math.Abs(normalizedWidth - width);
y += Math.Abs(normalizedHeight - height);
break;
}
case SvgConstants.Values.DEFAULT_ASPECT_RATIO:
default: {
x += Math.Abs(normalizedWidth - width) / 2;
y += Math.Abs(normalizedHeight - height) / 2;
break;
}
}
width = normalizedWidth;
height = normalizedHeight;
}
float v = y + height;
currentCanvas.AddXObject(xObject, width, 0, 0, -height, x, v);
}
){kind=link}