void InitGraphics()
{
//INIT ONCE
if (_g != null)
{
return;
}
//
_destImg = new MemBitmap(800, 600);
_painter = AggPainter.Create(_destImg);
_winBmp = new Bitmap(_destImg.Width, _destImg.Height, System.Drawing.Imaging.PixelFormat.Format32bppArgb);
_g = this.CreateGraphics();
_defaultReqFont = new PixelFarm.Drawing.RequestFont("Source Sans Pro", 10);
_painter.CurrentFont = _defaultReqFont;
_textService = new Typography.Text.OpenFontTextService();
_textService.LoadFontsFromFolder("../../../TestFonts");
_textService.UpdateUnicodeRanges();
_devVxsTextPrinter = new PixelFarm.Drawing.VxsTextSpanPrinter(_painter, _textService.CreateNewServiceClient());
_devVxsTextPrinter.SetSvgBmpBuilderFunc(PaintLab.SvgBuilderHelper.ParseAndRenderSvg);
_devVxsTextPrinter.ScriptLang = new ScriptLang(ScriptTagDefs.Latin.Tag);
_devVxsTextPrinter.PositionTechnique = Typography.TextLayout.PositionTechnique.OpenFont;
//Alternative Typeface selector..
_myAlternativeTypefaceSelector = new Typography.Text.AlternativeTypefaceSelector();
{
//------------
//TODO: review this again
//load from config?
//------------
//arabic
//1. create prefer typeface list for arabic script
var preferTypefaces = new Typography.FontCollections.PreferredTypefaceList();
preferTypefaces.AddTypefaceName("Noto Sans Arabic UI");
//2. set unicode ranges and prefered typeface list.
_myAlternativeTypefaceSelector.SetPreferredTypefaces(
new[] { Typography.TextBreak.Unicode13RangeInfoList.Arabic,
Typography.TextBreak.Unicode13RangeInfoList.Arabic_Supplement,
Typography.TextBreak.Unicode13RangeInfoList.Arabic_Extended_A },
preferTypefaces);
}
{
//latin
var preferTypefaces = new Typography.FontCollections.PreferredTypefaceList();
preferTypefaces.AddTypefaceName("Sarabun");
_myAlternativeTypefaceSelector.SetPreferredTypefaces(
new[] { Typography.TextBreak.Unicode13RangeInfoList.C0_Controls_and_Basic_Latin,
Typography.TextBreak.Unicode13RangeInfoList.C1_Controls_and_Latin_1_Supplement,
Typography.TextBreak.Unicode13RangeInfoList.Latin_Extended_A,
Typography.TextBreak.Unicode13RangeInfoList.Latin_Extended_B, },
preferTypefaces);
}
_devVxsTextPrinter.AlternativeTypefaceSelector = _myAlternativeTypefaceSelector;
}
void DrawStringToMemBitmap(RequestFont reqFont, string textOutput, float x_pos, float y_pos, int repeatLines = 1)
{
ResolvedFont resolvedFont = _textService.ResolveFont(reqFont);
if (resolvedFont == null)
{
//we dont' have
resolvedFont = _textService.ResolveFont(_defaultReqFont);
if (resolvedFont == null)
{
throw new NotSupportedException();
}
//use alternative typeface, but use reqFont's Size
resolvedFont = new ResolvedFont(resolvedFont.Typeface, reqFont.SizeInPoints);
}
//check if reqFont has alternative or not
_myAlternativeTypefaceSelector.SetCurrentReqFont(reqFont, _textService);
PixelFarm.Drawing.VxsTextSpanPrinter _selectedTextPrinter = _devVxsTextPrinter;
_painter.UseLcdEffectSubPixelRendering = true;
_painter.FillColor = PixelFarm.Drawing.Color.Black;
_selectedTextPrinter = _devVxsTextPrinter;
_selectedTextPrinter.FontSizeInPoints = resolvedFont.SizeInPoints;
_selectedTextPrinter.Typeface = resolvedFont.Typeface;
_selectedTextPrinter.ScriptLang = new ScriptLang(ScriptTagDefs.Latin.Tag);
_selectedTextPrinter.PositionTechnique = PositionTechnique.OpenFont;
_selectedTextPrinter.HintTechnique = HintTechnique.None;
_selectedTextPrinter.EnableLigature = true;
_selectedTextPrinter.SimulateSlant = false;
_selectedTextPrinter.EnableMultiTypefaces = true; //*** for auto typeface selection***
//_selectedTextPrinter.TextBaseline = PixelFarm.Drawing.TextBaseline.Alphabetic;
//_selectedTextPrinter.TextBaseline = PixelFarm.Drawing.TextBaseline.Bottom;
_selectedTextPrinter.TextBaseline = (Typography.Text.TextBaseline)PixelFarm.Drawing.TextBaseline.Top;
//test print 3 lines
//#if DEBUG
// DynamicOutline.dbugTestNewGridFitting = _contourAnalysisOpts.EnableGridFit;
// DynamicOutline.dbugActualPosToConsole = _contourAnalysisOpts.WriteFitOutputToConsole;
// DynamicOutline.dbugUseHorizontalFitValue = _contourAnalysisOpts.UseHorizontalFitAlignment;
//#endif
char[] printTextBuffer = textOutput.ToCharArray();
float lineSpacingPx = _selectedTextPrinter.FontLineSpacingPx;
const int REF_LINE_LEN = 300;
for (int i = 0; i < repeatLines; ++i)
{
_selectedTextPrinter.DrawString(printTextBuffer, x_pos, y_pos);
#if DEBUG
//show debug info...
var prevColor = _painter.FillColor;
var prevStrokColor = _painter.StrokeColor;
_painter.FillColor = PixelFarm.Drawing.Color.Red;
_painter.FillRect(x_pos, y_pos, 5, 5); // start point
//see //https://developer.mozilla.org/en-US/docs/Web/API/CanvasRenderingContext2D/textBaseline
switch (_selectedTextPrinter.TextBaseline)
{
default:
{
System.Diagnostics.Debug.WriteLine("UNIMPLEMENTED" + _selectedTextPrinter.TextBaseline.ToString());
goto case Typography.Text.TextBaseline.Alphabetic; //
}
case Typography.Text.TextBaseline.Alphabetic:
{
//alphabetic baseline
_painter.StrokeColor = _grayColor;
_painter.DrawLine(x_pos, /**/ y_pos,
x_pos + REF_LINE_LEN, y_pos);
_painter.StrokeColor = PixelFarm.Drawing.Color.Blue;
_painter.DrawLine(x_pos, /**/ y_pos - _selectedTextPrinter.FontDescedingPx,
x_pos + REF_LINE_LEN, y_pos - _selectedTextPrinter.FontDescedingPx); //bottom most
}
break;
case Typography.Text.TextBaseline.Top:
{
//alphabetic baseline
_painter.StrokeColor = _grayColor;
_painter.DrawLine(x_pos, /**/ y_pos + _selectedTextPrinter.FontAscendingPx,
x_pos + REF_LINE_LEN, y_pos + _selectedTextPrinter.FontAscendingPx);
//em bottom
_painter.StrokeColor = PixelFarm.Drawing.Color.Blue;
_painter.DrawLine(x_pos, /**/ y_pos + (_selectedTextPrinter.FontAscendingPx - _selectedTextPrinter.FontDescedingPx),
x_pos + REF_LINE_LEN, y_pos + (_selectedTextPrinter.FontAscendingPx - _selectedTextPrinter.FontDescedingPx)); //bottom most
}
break;
case Typography.Text.TextBaseline.Bottom:
{
//alphabetic baseline
_painter.StrokeColor = _grayColor;
_painter.DrawLine(x_pos, /**/ y_pos + _selectedTextPrinter.FontDescedingPx,
x_pos + REF_LINE_LEN, y_pos + _selectedTextPrinter.FontDescedingPx);
//em bottom
_painter.StrokeColor = PixelFarm.Drawing.Color.Blue;
_painter.DrawLine(x_pos, /**/ y_pos,
x_pos + REF_LINE_LEN, y_pos); //bottom most
}
break;
}
_painter.FillColor = prevColor;
_painter.StrokeColor = prevColor;
#endif
y_pos += (_selectedTextPrinter.FontAscendingPx - _selectedTextPrinter.FontDescedingPx);
}
//reset
_myAlternativeTypefaceSelector.SetCurrentReqFont(null, null);
}
