/// <summary>
/// Creates a brush from the given <see cref="T:Dataweb.NShape.IFillStyle"/>.
/// Depending of the fill mode of the fill style, the result can be a <see cref="T:System.Drawing.SolidBrush"/>,
/// a <see cref="T:System.Drawing.Drawing2D.HatchBrush"/>, a a <see cref="T:System.Drawing.Drawing2D.LinerGradientBrush"/> or
/// a <see cref="T:System.Drawing.TextureBrush"/>.
/// </summary>
public static Brush GetBrush(IFillStyle fillStyle)
{
if (fillStyle == null)
{
throw new ArgumentNullException("fillStyle");
}
BrushKey brushKey;
brushKey.FillStyle = fillStyle;
brushKey.Image = null;
Brush brush = null;
if (!_brushCache.TryGetValue(brushKey, out brush))
{
switch (fillStyle.FillMode)
{
case FillMode.Solid:
brush = new SolidBrush(GetColor(fillStyle.BaseColorStyle, fillStyle.ConvertToGrayScale));
break;
case FillMode.Pattern:
brush = new HatchBrush(fillStyle.FillPattern, GetColor(fillStyle.BaseColorStyle, fillStyle.ConvertToGrayScale), GetColor(fillStyle.AdditionalColorStyle, fillStyle.ConvertToGrayScale));
break;
case FillMode.Gradient:
_rectBuffer.X = 0;
_rectBuffer.Y = 0;
_rectBuffer.Width = 100;
_rectBuffer.Height = 100;
brush = new LinearGradientBrush(_rectBuffer, GetColor(fillStyle.AdditionalColorStyle, fillStyle.ConvertToGrayScale), GetColor(fillStyle.BaseColorStyle, fillStyle.ConvertToGrayScale), fillStyle.GradientAngle);
break;
case FillMode.Image:
if (NamedImage.IsNullOrEmpty(fillStyle.Image))
{
brush = new SolidBrush(Color.Transparent);
}
else
{
// Get ImageAttributes
ImageAttributes imgAttribs = null;
if (!_imageAttribsCache.TryGetValue(brushKey, out imgAttribs))
{
imgAttribs = GdiHelpers.GetImageAttributes(fillStyle.ImageLayout, fillStyle.ImageGammaCorrection,
fillStyle.ImageTransparency, fillStyle.ConvertToGrayScale);
_imageAttribsCache.Add(brushKey, imgAttribs);
}
// Create Brush
_rectBuffer.X = 0;
_rectBuffer.Y = 0;
_rectBuffer.Width = fillStyle.Image.Width;
_rectBuffer.Height = fillStyle.Image.Height;
brush = new TextureBrush(fillStyle.Image.Image, _rectBuffer, imgAttribs);
}
break;
default: throw new NShapeUnsupportedValueException(fillStyle.FillMode);
}
// Add created brush to the BrushCache
_brushCache.Add(brushKey, brush);
}
return(brush);
}
