/// <summary>
/// Setups the shading pattern from the specified brush.
/// </summary>
internal void SetupFromBrush(XLinearGradientBrush brush, XMatrix matrix, XGraphicsPdfRenderer renderer)
{
if (brush == null)
throw new ArgumentNullException("brush");
PdfShading shading = new PdfShading(_document);
shading.SetupFromBrush(brush, renderer);
Elements[Keys.Shading] = shading;
//Elements[Keys.Matrix] = new PdfLiteral("[" + PdfEncoders.ToString(matrix) + "]");
Elements.SetMatrix(Keys.Matrix, matrix);
}
public PdfGraphicsState(XGraphicsPdfRenderer renderer)
{
this.renderer = renderer;
}
/// <summary>
/// Setups the shading from the specified brush.
/// </summary>
internal void SetupFromBrush(XLinearGradientBrush brush, XGraphicsPdfRenderer renderer)
{
if (brush == null)
throw new ArgumentNullException("brush");
PdfColorMode colorMode = _document.Options.ColorMode;
XColor color1 = ColorSpaceHelper.EnsureColorMode(colorMode, brush._color1);
XColor color2 = ColorSpaceHelper.EnsureColorMode(colorMode, brush._color2);
PdfDictionary function = new PdfDictionary();
Elements[Keys.ShadingType] = new PdfInteger(2);
if (colorMode != PdfColorMode.Cmyk)
Elements[Keys.ColorSpace] = new PdfName("/DeviceRGB");
else
Elements[Keys.ColorSpace] = new PdfName("/DeviceCMYK");
double x1 = 0, y1 = 0, x2 = 0, y2 = 0;
if (brush._useRect)
{
XPoint pt1 = renderer.WorldToView(brush._rect.TopLeft);
XPoint pt2 = renderer.WorldToView(brush._rect.BottomRight);
switch (brush._linearGradientMode)
{
case XLinearGradientMode.Horizontal:
x1 = pt1.X;
y1 = pt1.Y;
x2 = pt2.X;
y2 = pt1.Y;
break;
case XLinearGradientMode.Vertical:
x1 = pt1.X;
y1 = pt1.Y;
x2 = pt1.X;
y2 = pt2.Y;
break;
case XLinearGradientMode.ForwardDiagonal:
x1 = pt1.X;
y1 = pt1.Y;
x2 = pt2.X;
y2 = pt2.Y;
break;
case XLinearGradientMode.BackwardDiagonal:
x1 = pt2.X;
y1 = pt1.Y;
x2 = pt1.X;
y2 = pt2.Y;
break;
}
}
else
{
XPoint pt1 = renderer.WorldToView(brush._point1);
XPoint pt2 = renderer.WorldToView(brush._point2);
x1 = pt1.X;
y1 = pt1.Y;
x2 = pt2.X;
y2 = pt2.Y;
}
const string format = Config.SignificantFigures3;
Elements[Keys.Coords] = new PdfLiteral("[{0:" + format + "} {1:" + format + "} {2:" + format + "} {3:" + format + "}]", x1, y1, x2, y2);
//Elements[Keys.Background] = new PdfRawItem("[0 1 1]");
//Elements[Keys.Domain] =
Elements[Keys.Function] = function;
//Elements[Keys.Extend] = new PdfRawItem("[true true]");
string clr1 = "[" + PdfEncoders.ToString(color1, colorMode) + "]";
string clr2 = "[" + PdfEncoders.ToString(color2, colorMode) + "]";
function.Elements["/FunctionType"] = new PdfInteger(2);
function.Elements["/C0"] = new PdfLiteral(clr1);
function.Elements["/C1"] = new PdfLiteral(clr2);
function.Elements["/Domain"] = new PdfLiteral("[0 1]");
function.Elements["/N"] = new PdfInteger(1);
}
