/// <summary>
/// Renders the bar code.
/// </summary>
protected internal override void Render(XGraphics gfx, XBrush brush, XFont font, XPoint position)
{
XGraphicsState state = gfx.Save();
BarCodeRenderInfo info = new BarCodeRenderInfo(gfx, brush, font, position);
InitRendering(info);
info.CurrPosInString = 0;
//info.CurrPos = Center - Size / 2;
info.CurrPos = position - CalcDistance(AnchorType.TopLeft, Anchor, Size);
if (TurboBit)
{
RenderTurboBit(info, true);
}
RenderStart(info);
while (info.CurrPosInString < Text.Length)
{
RenderNextChar(info);
RenderGap(info, false);
}
RenderStop(info);
if (TurboBit)
{
RenderTurboBit(info, false);
}
if (TextLocation != TextLocation.None)
{
RenderText(info);
}
gfx.Restore(state);
}
internal override void InitRendering(BarCodeRenderInfo info)
{
base.InitRendering(info);
CalcThinBarWidth(info);
info.BarHeight = Size.Height;
// HACK in ThickThinBarCode
if (TextLocation != TextLocation.None)
{
info.BarHeight *= 4.0 / 5;
}
#if DEBUG_
XColor back = XColors.LightSalmon;
back.A = 0.3;
XSolidBrush brush = new XSolidBrush(back);
info.Gfx.DrawRectangle(brush, new XRect(info.Center - size / 2, size));
#endif
switch (Direction)
{
case CodeDirection.RightToLeft:
info.Gfx.RotateAtTransform(180, info.Position);
break;
case CodeDirection.TopToBottom:
info.Gfx.RotateAtTransform(90, info.Position);
break;
case CodeDirection.BottomToTop:
info.Gfx.RotateAtTransform(-90, info.Position);
break;
}
}
private void RenderChar(BarCodeRenderInfo info, char ch)
{
bool[] thickThinLines = ThickThinLines(ch);
int idx = 0;
while (idx < 9)
{
RenderBar(info, thickThinLines[idx]);
if (idx < 8)
{
RenderGap(info, thickThinLines[idx + 1]);
}
idx += 2;
}
}
/// <summary>
/// Calculates the thick and thin line widths,
/// taking into account the required rendering size.
/// </summary>
internal override void CalcThinBarWidth(BarCodeRenderInfo info)
{
/*
* The total width is the sum of the following parts:
* Starting lines = 3 * thick + 7 * thin
* +
* Code Representation = (3 * thick + 7 * thin) * code.Length
* +
* Stopping lines = 3 * thick + 6 * thin
*
* with r = relation ( = thick / thin), this results in
*
* Total width = (13 + 6 * r + (3 * r + 7) * code.Length) * thin
*/
double thinLineAmount = 13 + 6 * WideNarrowRatio + (3 * WideNarrowRatio + 7) * Text.Length;
info.ThinBarWidth = Size.Width / thinLineAmount;
}
private void RenderStop(BarCodeRenderInfo info) => RenderChar(info, '*');
private void RenderStart(BarCodeRenderInfo info)
{
RenderChar(info, '*');
RenderGap(info, false);
}
private void RenderNextChar(BarCodeRenderInfo info)
{
RenderChar(info, Text[info.CurrPosInString]);
++info.CurrPosInString;
}
