void RenderByGlyphIndex(ushort selectedGlyphIndex)
{
//---------------------------------------------
//this version only render with MiniAgg**
//---------------------------------------------
_painter.Clear(PixelFarm.Drawing.Color.White);
_painter.UseLcdEffectSubPixelRendering = _contourAnalysisOpts.LcdTechnique;
_painter.FillColor = PixelFarm.Drawing.Color.Black;
_selectedTextPrinter = _devVxsTextPrinter;
_selectedTextPrinter.Typeface = _basicOptions.Typeface;
_selectedTextPrinter.FontSizeInPoints = _basicOptions.FontSizeInPoints;
_selectedTextPrinter.ScriptLang = _basicOptions.ScriptLang;
_selectedTextPrinter.PositionTechnique = _basicOptions.PositionTech;
if (_selectedTextPrinter is PixelFarm.Drawing.VxsTextSpanPrinter vxsTextPrinter)
{
vxsTextPrinter.HintTechnique = _glyphRenderOptions.HintTechnique;
}
else
{
}
_selectedTextPrinter.EnableLigature = _glyphRenderOptions.EnableLigature;
_selectedTextPrinter.EnableMultiTypefaces = _basicOptions.EnableMultiTypefaces;
//test print 3 lines
#if DEBUG
DynamicOutline.dbugTestNewGridFitting = _contourAnalysisOpts.EnableGridFit;
DynamicOutline.dbugActualPosToConsole = _contourAnalysisOpts.WriteFitOutputToConsole;
DynamicOutline.dbugUseHorizontalFitValue = _contourAnalysisOpts.UseHorizontalFitAlignment;
#endif
float x_pos = 0, y_pos = 100;
var glyphPlanList = new Typography.TextLayout.UnscaledGlyphPlanList();
//in this version
//create a glyph-plan manully
glyphPlanList.Append(
new Typography.TextLayout.UnscaledGlyphPlan(0, selectedGlyphIndex, 0, 0, 0));
var seq = new Typography.TextLayout.GlyphPlanSequence(
glyphPlanList,
0, 1);
_selectedTextPrinter.DrawFromGlyphPlans(seq, x_pos, y_pos);
char[] printTextBuffer = this.txtInputChar.Text.ToCharArray();
float lineSpacingPx = _selectedTextPrinter.FontLineSpacingPx;
for (int i = 0; i < 1; ++i)
{
_selectedTextPrinter.DrawString(printTextBuffer, x_pos, y_pos);
y_pos -= lineSpacingPx;
}
//copy from Agg's memory buffer to gdi
PixelFarm.CpuBlit.BitmapHelper.CopyToGdiPlusBitmapSameSizeNotFlip(_destImg, _winBmp);
_g.Clear(System.Drawing.Color.White);
_g.DrawImage(_winBmp, new System.Drawing.Point(10, 0));
}
void UpdateRenderOutput()
{
if (!_readyToRender)
{
return;
}
//
if (_g == null)
{
InitGraphics();
}
if (string.IsNullOrEmpty(this.txtInputChar.Text))
{
return;
}
//test option use be used with lcd subpixel rendering.
//this demonstrate how we shift a pixel for subpixel rendering tech
if (_contourAnalysisOpts.SetupPrinterLayoutForLcdSubPix)
{
//TODO: set lcd or not here
}
else
{
//TODO: set lcd or not here
}
//1. read typeface from font file
TypographyTest.RenderChoice renderChoice = _basicOptions.RenderChoice;
switch (renderChoice)
{
case TypographyTest.RenderChoice.RenderWithGdiPlusPath:
//not render in this example
//see more at ...
break;
case TypographyTest.RenderChoice.RenderWithTextPrinterAndMiniAgg:
{
//clear previous draw
_painter.Clear(PixelFarm.Drawing.Color.White);
_painter.UseLcdEffectSubPixelRendering = _contourAnalysisOpts.LcdTechnique;
_painter.FillColor = PixelFarm.Drawing.Color.Black;
_selectedTextPrinter = _devVxsTextPrinter;
_selectedTextPrinter.Typeface = _basicOptions.Typeface;
_selectedTextPrinter.FontSizeInPoints = _basicOptions.FontSizeInPoints;
_selectedTextPrinter.ScriptLang = _basicOptions.ScriptLang;
_selectedTextPrinter.PositionTechnique = _basicOptions.PositionTech;
if (_selectedTextPrinter is PixelFarm.Drawing.VxsTextSpanPrinter vxsTextPrinter)
{
vxsTextPrinter.HintTechnique = _glyphRenderOptions.HintTechnique;
}
_selectedTextPrinter.EnableLigature = _glyphRenderOptions.EnableLigature;
_selectedTextPrinter.EnableMultiTypefaces = _basicOptions.EnableMultiTypefaces;
_selectedTextPrinter.SimulateSlant = _contourAnalysisOpts.SimulateSlant;
_selectedTextPrinter.TextBaseline = (Typography.Text.TextBaseline)(int) lstTextBaseline.SelectedItem;
//test print 3 lines
#if DEBUG
DynamicOutline.dbugTestNewGridFitting = _contourAnalysisOpts.EnableGridFit;
DynamicOutline.dbugActualPosToConsole = _contourAnalysisOpts.WriteFitOutputToConsole;
DynamicOutline.dbugUseHorizontalFitValue = _contourAnalysisOpts.UseHorizontalFitAlignment;
#endif
char[] printTextBuffer = this.txtInputChar.Text.ToCharArray();
float x_pos = 0, y_pos = 0;
float lineSpacingPx = _selectedTextPrinter.FontLineSpacingPx;
const int REF_LINE_LEN = 300;
for (int i = 0; i < 3; ++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);
}
//copy from Agg's memory buffer to gdi
PixelFarm.CpuBlit.BitmapHelper.CopyToGdiPlusBitmapSameSizeNotFlip(_destImg, _winBmp);
_g.Clear(Color.White);
_g.DrawImage(_winBmp, new Point(0, 0));
}
break;
//==============================================
//render 1 glyph for debug and test
case TypographyTest.RenderChoice.RenderWithMsdfGen:
case TypographyTest.RenderChoice.RenderWithSdfGen:
{
char testChar = this.txtInputChar.Text[0];
Typeface typeFace = _basicOptions.Typeface;
RenderWithMsdfImg(typeFace, testChar, _basicOptions.FontSizeInPoints);
}
break;
case TypographyTest.RenderChoice.RenderWithMiniAgg_SingleGlyph:
{
_selectedTextPrinter = _devVxsTextPrinter;
//for test only 1 char
RenderSingleCharWithMiniAgg(
_basicOptions.Typeface,
this.txtInputChar.Text[0],
_basicOptions.FontSizeInPoints);
}
break;
default:
throw new NotSupportedException();
}
}
