/// <summary>
/// Builds the
/// <see cref="iText.Kernel.Colors.Color"/>
/// object representing the linear gradient with specified configuration
/// that fills the target bounding box.
/// </summary>
/// <param name="targetBoundingBox">the bounding box to be filled in current space</param>
/// <param name="contextTransform">
/// the transformation from the base coordinates space into
/// the current space. The
/// <see langword="null"/>
/// value is valid and can be used
/// if there is no transformation from base coordinates to current space
/// specified, or it is equal to identity transformation.
/// </param>
/// <param name="document">
/// the
/// <see cref="iText.Kernel.Pdf.PdfDocument"/>
/// for which the linear gradient would be built.
/// </param>
/// <returns>
/// the constructed
/// <see cref="iText.Kernel.Colors.Color"/>
/// or
/// <see langword="null"/>
/// if no color to be applied
/// or base gradient vector has been specified
/// </returns>
public virtual Color BuildColor(Rectangle targetBoundingBox, AffineTransform contextTransform, PdfDocument
document)
{
// TODO: DEVSIX-4136 the document argument would be required for opaque gradients (as we would need to create a mask form xObject)
Point[] baseCoordinatesVector = GetGradientVector(targetBoundingBox, contextTransform);
if (baseCoordinatesVector == null || this.stops.IsEmpty())
{
// Can not create gradient color with 0 stops or null coordinates vector
return(null);
}
// evaluate actual coordinates and transformation
AffineTransform shadingTransform = new AffineTransform();
if (contextTransform != null)
{
shadingTransform.Concatenate(contextTransform);
}
AffineTransform gradientTransformation = GetCurrentSpaceToGradientVectorSpaceTransformation(targetBoundingBox
, contextTransform);
if (gradientTransformation != null)
{
try {
if (targetBoundingBox != null)
{
targetBoundingBox = Rectangle.CalculateBBox(JavaUtil.ArraysAsList(gradientTransformation.InverseTransform(
new Point(targetBoundingBox.GetLeft(), targetBoundingBox.GetBottom()), null), gradientTransformation.InverseTransform
(new Point(targetBoundingBox.GetLeft(), targetBoundingBox.GetTop()), null), gradientTransformation.InverseTransform
(new Point(targetBoundingBox.GetRight(), targetBoundingBox.GetBottom()), null), gradientTransformation
.InverseTransform(new Point(targetBoundingBox.GetRight(), targetBoundingBox.GetTop()), null)));
}
shadingTransform.Concatenate(gradientTransformation);
}
catch (NoninvertibleTransformException) {
LogManager.GetLogger(GetType()).Error(iText.IO.LogMessageConstant.UNABLE_TO_INVERT_GRADIENT_TRANSFORMATION
);
}
}
PdfShading.Axial axial = CreateAxialShading(baseCoordinatesVector, this.stops, this.spreadMethod, targetBoundingBox
);
if (axial == null)
{
return(null);
}
PdfPattern.Shading shading = new PdfPattern.Shading(axial);
if (!shadingTransform.IsIdentity())
{
double[] matrix = new double[6];
shadingTransform.GetMatrix(matrix);
shading.SetMatrix(new PdfArray(matrix));
}
return(new PatternColor(shading));
}
){kind=link}
internal virtual AffineTransform CalculateTransformation(SvgDrawContext context)
{
Rectangle viewPort = context.GetCurrentViewPort();
float horizontal = viewPort.GetX();
float vertical = viewPort.GetY() + viewPort.GetHeight();
// flip coordinate space vertically and translate on the y axis with the viewport height
AffineTransform transform = AffineTransform.GetTranslateInstance(0, 0);
//Identity-transform
transform.Concatenate(AffineTransform.GetTranslateInstance(horizontal, vertical));
transform.Concatenate(new AffineTransform(1, 0, 0, -1, 0, 0));
return(transform);
}
private AffineTransform GetGradientTransformToUserSpaceOnUse(Rectangle objectBoundingBox, bool isObjectBoundingBox
)
{
AffineTransform gradientTransform = new AffineTransform();
if (isObjectBoundingBox)
{
gradientTransform.Translate(objectBoundingBox.GetX(), objectBoundingBox.GetY());
// We need to scale with dividing the lengths by 0.75 as further we should
// concatenate gradient transformation matrix which has no absolute parsing.
// For example, if gradientTransform is set to translate(1, 1) and gradientUnits
// is set to "objectBoundingBox" then the gradient should be shifted horizontally
// and vertically exactly by the size of the element bounding box. So, again,
// as we parse translate(1, 1) to translation(0.75, 0.75) the bounding box in
// the gradient vector space should be 0.75x0.75 in order for such translation
// to shift by the complete size of bounding box.
gradientTransform.Scale(objectBoundingBox.GetWidth() / 0.75, objectBoundingBox.GetHeight() / 0.75);
}
AffineTransform svgGradientTransformation = GetGradientTransform();
if (svgGradientTransformation != null)
{
gradientTransform.Concatenate(svgGradientTransformation);
}
return(gradientTransform);
}
public override void DrawBackground(DrawContext drawContext)
{
PdfCanvas canvas = drawContext.GetCanvas();
Matrix ctm = canvas.GetGraphicsState().GetCtm();
// Avoid rotation
float?angle = this.GetPropertyAsFloat(Property.ROTATION_ANGLE);
bool avoidRotation = null != angle && null != this.GetProperty <Background>(Property.BACKGROUND);
if (avoidRotation)
{
AffineTransform transform = new AffineTransform(ctm.Get(0), ctm.Get(1), ctm.Get(3), ctm.Get(4), ctm.Get(6)
, ctm.Get(7));
try {
transform = transform.CreateInverse();
}
catch (NoninvertibleTransformException e) {
throw new Exception(e.Message, e);
}
transform.Concatenate(new AffineTransform());
canvas.ConcatMatrix(transform);
DeleteProperty(Property.ROTATION_ANGLE);
}
base.DrawBackground(drawContext);
// restore concat matrix and rotation angle
if (avoidRotation)
{
SetProperty(Property.ROTATION_ANGLE, angle);
canvas.ConcatMatrix(new AffineTransform(ctm.Get(0), ctm.Get(1), ctm.Get(3), ctm.Get(4), ctm.Get(6), ctm.Get
(7)));
}
}
protected void ManipulatePdf(String dest)
{
PdfDocument srcDoc = new PdfDocument(new PdfReader(SRC));
PdfDocument pdfDoc = new PdfDocument(new PdfWriter(dest));
float a4Width = PageSize.A4.GetWidth();
float a4Height = PageSize.A4.GetHeight();
PageSize pagesize = new PageSize(a4Width * 4, a4Height * 2);
pdfDoc.SetDefaultPageSize(pagesize);
int numberOfPages = srcDoc.GetNumberOfPages();
int p = 1;
PdfCanvas canvas = new PdfCanvas(pdfDoc.AddNewPage());
while ((p - 1) <= numberOfPages)
{
CopyPageToDoc(canvas, srcDoc, pdfDoc, p + 3, 0);
CopyPageToDoc(canvas, srcDoc, pdfDoc, p + 12, a4Width);
CopyPageToDoc(canvas, srcDoc, pdfDoc, p + 15, a4Width * 2);
CopyPageToDoc(canvas, srcDoc, pdfDoc, p, a4Width * 3);
canvas.SaveState();
// Rotate on 180 degrees and copy pages to the top row.
AffineTransform at = AffineTransform.GetRotateInstance((float)-Math.PI);
at.Concatenate(AffineTransform.GetTranslateInstance(0, -a4Height * 2));
canvas.ConcatMatrix(at);
CopyPageToDoc(canvas, srcDoc, pdfDoc, p + 4, -a4Width);
CopyPageToDoc(canvas, srcDoc, pdfDoc, p + 11, -a4Width * 2);
CopyPageToDoc(canvas, srcDoc, pdfDoc, p + 8, -a4Width * 3);
CopyPageToDoc(canvas, srcDoc, pdfDoc, p + 7, -a4Width * 4);
canvas.RestoreState();
canvas = new PdfCanvas(pdfDoc.AddNewPage());
CopyPageToDoc(canvas, srcDoc, pdfDoc, p + 1, 0);
CopyPageToDoc(canvas, srcDoc, pdfDoc, p + 14, a4Width);
CopyPageToDoc(canvas, srcDoc, pdfDoc, p + 13, a4Width * 2);
CopyPageToDoc(canvas, srcDoc, pdfDoc, p + 2, a4Width * 3);
canvas.SaveState();
// Rotate on 180 degrees and copy pages to the top row.
canvas.ConcatMatrix(at);
CopyPageToDoc(canvas, srcDoc, pdfDoc, p + 6, -a4Width);
CopyPageToDoc(canvas, srcDoc, pdfDoc, p + 9, -a4Width * 2);
CopyPageToDoc(canvas, srcDoc, pdfDoc, p + 10, -a4Width * 3);
CopyPageToDoc(canvas, srcDoc, pdfDoc, p + 5, -a4Width * 4);
canvas.RestoreState();
if ((p - 1) / 16 < numberOfPages / 16)
{
canvas = new PdfCanvas(pdfDoc.AddNewPage());
}
p += 16;
}
pdfDoc.Close();
srcDoc.Close();
}
){kind=link}
private static AffineTransform GetTextTransform(float[][] absolutePositions, SvgDrawContext context)
{
AffineTransform tf = new AffineTransform();
//If x is not specified, but y is, we need to correct for preceding text.
if (absolutePositions[0] == null && absolutePositions[1] != null)
{
absolutePositions[0] = new float[] { context.GetTextMove()[0] };
}
//If y is not present, we can replace it with a neutral transformation (0.0f)
if (absolutePositions[1] == null)
{
absolutePositions[1] = new float[] { 0.0f };
}
tf.Concatenate(TEXTFLIP);
tf.Concatenate(AffineTransform.GetTranslateInstance(absolutePositions[0][0], -absolutePositions[1][0]));
return(tf);
}
/// <summary>
/// Creates and returns a <seealso cref="PaintContext"/> used to
/// generate a circular radial color gradient pattern.
/// See the description of the <seealso cref="Paint#createContext createContext"/> method
/// for information on null parameter handling.
/// </summary>
/// <param name="cm"> the preferred <seealso cref="ColorModel"/> which represents the most convenient
/// format for the caller to receive the pixel data, or {@code null}
/// if there is no preference. </param>
/// <param name="deviceBounds"> the device space bounding box
/// of the graphics primitive being rendered. </param>
/// <param name="userBounds"> the user space bounding box
/// of the graphics primitive being rendered. </param>
/// <param name="transform"> the <seealso cref="AffineTransform"/> from user
/// space into device space. </param>
/// <param name="hints"> the set of hints that the context object can use to
/// choose between rendering alternatives. </param>
/// <returns> the {@code PaintContext} for
/// generating color patterns. </returns>
/// <seealso cref= Paint </seealso>
/// <seealso cref= PaintContext </seealso>
/// <seealso cref= ColorModel </seealso>
/// <seealso cref= Rectangle </seealso>
/// <seealso cref= Rectangle2D </seealso>
/// <seealso cref= AffineTransform </seealso>
/// <seealso cref= RenderingHints </seealso>
public override PaintContext CreateContext(ColorModel cm, Rectangle deviceBounds, Rectangle2D userBounds, AffineTransform transform, RenderingHints hints)
{
// avoid modifying the user's transform...
transform = new AffineTransform(transform);
// incorporate the gradient transform
transform.Concatenate(GradientTransform);
return(new RadialGradientPaintContext(this, cm, deviceBounds, userBounds, transform, hints, (float)Center.X, (float)Center.Y, Radius_Renamed, (float)Focus.X, (float)Focus.Y, Fractions_Renamed, Colors_Renamed, CycleMethod_Renamed, ColorSpace_Renamed));
}
/// <summary>
/// Creates and returns a <seealso cref="PaintContext"/> used to
/// generate a linear color gradient pattern.
/// See the <seealso cref="Paint#createContext specification"/> of the
/// method in the <seealso cref="Paint"/> interface for information
/// on null parameter handling.
/// </summary>
/// <param name="cm"> the preferred <seealso cref="ColorModel"/> which represents the most convenient
/// format for the caller to receive the pixel data, or {@code null}
/// if there is no preference. </param>
/// <param name="deviceBounds"> the device space bounding box
/// of the graphics primitive being rendered. </param>
/// <param name="userBounds"> the user space bounding box
/// of the graphics primitive being rendered. </param>
/// <param name="transform"> the <seealso cref="AffineTransform"/> from user
/// space into device space. </param>
/// <param name="hints"> the set of hints that the context object can use to
/// choose between rendering alternatives. </param>
/// <returns> the {@code PaintContext} for
/// generating color patterns. </returns>
/// <seealso cref= Paint </seealso>
/// <seealso cref= PaintContext </seealso>
/// <seealso cref= ColorModel </seealso>
/// <seealso cref= Rectangle </seealso>
/// <seealso cref= Rectangle2D </seealso>
/// <seealso cref= AffineTransform </seealso>
/// <seealso cref= RenderingHints </seealso>
public override PaintContext CreateContext(ColorModel cm, Rectangle deviceBounds, Rectangle2D userBounds, AffineTransform transform, RenderingHints hints)
{
// avoid modifying the user's transform...
transform = new AffineTransform(transform);
// incorporate the gradient transform
transform.Concatenate(GradientTransform);
if ((Fractions_Renamed.Length == 2) && (CycleMethod_Renamed != CycleMethod.REPEAT) && (ColorSpace_Renamed == ColorSpaceType.SRGB))
{
// faster to use the basic GradientPaintContext for this
// common case
bool cyclic = (CycleMethod_Renamed != CycleMethod.NO_CYCLE);
return(new GradientPaintContext(cm, Start, End, transform, Colors_Renamed[0], Colors_Renamed[1], cyclic));
}
else
{
return(new LinearGradientPaintContext(this, cm, deviceBounds, userBounds, transform, hints, Start, End, Fractions_Renamed, Colors_Renamed, CycleMethod_Renamed, ColorSpace_Renamed));
}
}
protected void ManipulatePdf(String dest)
{
PdfDocument pdfDoc = new PdfDocument(new PdfReader(SRC), new PdfWriter(dest));
ImageData image = ImageDataFactory.Create(IMG);
// Translation defines the position of the image on the page and scale transformation sets image dimensions
// Please also note that image without scaling is drawn in 1x1 rectangle. And here we draw image on page using
// its original size in pixels.
AffineTransform affineTransform = AffineTransform.GetTranslateInstance(36, 300);
// Make sure that the image is visible by concatenating a scale transformation
affineTransform.Concatenate(AffineTransform.GetScaleInstance(image.GetWidth(), image.GetHeight()));
PdfCanvas canvas = new PdfCanvas(pdfDoc.GetFirstPage());
float[] matrix = new float[6];
affineTransform.GetMatrix(matrix);
canvas.AddImageWithTransformationMatrix(image, matrix[0], matrix[1], matrix[2], matrix[3], matrix[4], matrix[5]);
pdfDoc.Close();
}
/// <summary>Evaluates the minimal domain that covers the box with vector normals.</summary>
/// <remarks>
/// Evaluates the minimal domain that covers the box with vector normals.
/// The domain corresponding to the initial vector is [0, 1].
/// </remarks>
/// <param name="coords">
/// the array of exactly two elements that describe
/// the base vector (corresponding to [0,1] domain, that need to be adjusted
/// to cover the box
/// </param>
/// <param name="toCover">the box that needs to be covered</param>
/// <returns>
/// the array of two elements in ascending order specifying the calculated covering
/// domain
/// </returns>
protected internal static double[] EvaluateCoveringDomain(Point[] coords, Rectangle toCover)
{
if (toCover == null)
{
return(new double[] { 0d, 1d });
}
AffineTransform transform = new AffineTransform();
double scale = 1d / (coords[0].Distance(coords[1]));
double sin = -(coords[1].GetY() - coords[0].GetY()) * scale;
double cos = (coords[1].GetX() - coords[0].GetX()) * scale;
if (Math.Abs(cos) < ZERO_EPSILON)
{
cos = 0d;
sin = sin > 0d ? 1d : -1d;
}
else
{
if (Math.Abs(sin) < ZERO_EPSILON)
{
sin = 0d;
cos = cos > 0d ? 1d : -1d;
}
}
transform.Concatenate(new AffineTransform(cos, sin, -sin, cos, 0, 0));
transform.Scale(scale, scale);
transform.Translate(-coords[0].GetX(), -coords[0].GetY());
Point[] rectanglePoints = toCover.ToPointsArray();
double minX = transform.Transform(rectanglePoints[0], null).GetX();
double maxX = minX;
for (int i = 1; i < rectanglePoints.Length; ++i)
{
double currentX = transform.Transform(rectanglePoints[i], null).GetX();
minX = Math.Min(minX, currentX);
maxX = Math.Max(maxX, currentX);
}
return(new double[] { minX, maxX });
}
){kind=link}
/// <summary>Converts a string containing a transform declaration into an AffineTransform object.</summary>
/// <remarks>
/// Converts a string containing a transform declaration into an AffineTransform object.
/// This class only supports the transformations as described in the SVG specification:
/// - matrix
/// - translate
/// - skewx
/// - skewy
/// - rotate
/// - scale
/// </remarks>
/// <param name="transform">value to be parsed</param>
/// <returns>the AffineTransform object</returns>
public static AffineTransform ParseTransform(String transform)
{
if (transform == null)
{
throw new SvgProcessingException(SvgLogMessageConstant.TRANSFORM_NULL);
}
if (String.IsNullOrEmpty(transform))
{
throw new SvgProcessingException(SvgLogMessageConstant.TRANSFORM_EMPTY);
}
AffineTransform matrix = new AffineTransform();
IList <String> listWithTransformations = SplitString(transform);
foreach (String transformation in listWithTransformations)
{
AffineTransform newMatrix = TransformationStringToMatrix(transformation);
if (newMatrix != null)
{
matrix.Concatenate(newMatrix);
}
}
return(matrix);
}
/// <summary>
/// When in the svg element
/// <c>overflow</c>
/// is
/// <c>visible</c>
/// the corresponding formXObject
/// should have a BBox (form XObject’s bounding box; see PDF 32000-1:2008 - 8.10.2 Form Dictionaries)
/// that should cover the entire svg space (page in pdf) in order to be able to show parts of the element which are outside the current element viewPort.
/// </summary>
/// <remarks>
/// When in the svg element
/// <c>overflow</c>
/// is
/// <c>visible</c>
/// the corresponding formXObject
/// should have a BBox (form XObject’s bounding box; see PDF 32000-1:2008 - 8.10.2 Form Dictionaries)
/// that should cover the entire svg space (page in pdf) in order to be able to show parts of the element which are outside the current element viewPort.
/// To do this, we get the inverse matrix of all the current transformation matrix changes and apply it to the root viewPort.
/// This allows you to get the root rectangle in the final coordinate system.
/// </remarks>
/// <param name="context">current context to get canvases and view ports</param>
/// <param name="stream">stream to write a BBox</param>
private static void WriteBBoxAccordingToVisibleOverflow(SvgDrawContext context, PdfStream stream)
{
IList <PdfCanvas> canvases = new List <PdfCanvas>();
int canvasesSize = context.Size();
for (int i = 0; i < canvasesSize; i++)
{
canvases.Add(context.PopCanvas());
}
AffineTransform transform = new AffineTransform();
for (int i = canvases.Count - 1; i >= 0; i--)
{
PdfCanvas canvas = canvases[i];
Matrix matrix = canvas.GetGraphicsState().GetCtm();
transform.Concatenate(new AffineTransform(matrix.Get(0), matrix.Get(1), matrix.Get(3), matrix.Get(4), matrix
.Get(6), matrix.Get(7)));
context.PushCanvas(canvas);
}
try {
transform = transform.CreateInverse();
}
catch (NoninvertibleTransformException) {
// Case with zero determiner (see PDF 32000-1:2008 - 8.3.4 Transformation Matrices - NOTE 3)
// for example with a, b, c, d in cm equal to 0
stream.Put(PdfName.BBox, new PdfArray(new Rectangle(0, 0, 0, 0)));
ILog logger = LogManager.GetLogger(typeof(AbstractBranchSvgNodeRenderer));
logger.Warn(SvgLogMessageConstant.UNABLE_TO_GET_INVERSE_MATRIX_DUE_TO_ZERO_DETERMINANT);
return;
}
Point[] points = context.GetRootViewPort().ToPointsArray();
transform.Transform(points, 0, points, 0, points.Length);
Rectangle bbox = Rectangle.CalculateBBox(JavaUtil.ArraysAsList(points));
stream.Put(PdfName.BBox, new PdfArray(bbox));
}
public virtual void ConcetenateTransform(AffineTransform modTransform)
{
Usr2dev.Concatenate(modTransform);
}