void RunSampleA(PixelFarm.Drawing.Painter p)
{
//1. create simple vertical line to test agg's lcd rendernig technique
//create gray-scale actual image
ActualImage glyphImg = new ActualImage(100, 100, PixelFormat.ARGB32);
AggRenderSurface glyph2d = new AggRenderSurface(glyphImg);
AggPainter painter = new AggPainter(glyph2d);
painter.StrokeColor = PixelFarm.Drawing.Color.Black;
painter.StrokeWidth = 2.0f * 3;
int x = 10, y = 10;
painter.DrawLine(x * 3, 0, y * 3, 20); //scale horizontal 3 times,
int lineLen = 4;
//painter.Line(x * 3, 0, y * 3, 20); //scale horizontal 3 times,
//painter.Line(2, 0, 2, 15);
//painter.Line(2, 0, 20, 20);
//painter.Line(2, 0, 30, 15);
//painter.Line(2, 0, 30, 5);
//clear surface bg
p.Clear(PixelFarm.Drawing.Color.White);
//draw img into that bg
//---------------
//convert glyphImg from RGBA to grey Scale buffer
//---------------
//lcd process ...
byte[] glyphGreyScale = CreateGreyScaleBuffer(glyphImg);
//---------------
//swap gray scale
int newGreyImgStride;
byte[] expanedGreyScaleBuffer = CreateNewExpandedLcdGrayScale(glyphGreyScale, glyphImg.Width, glyphImg.Height, out newGreyImgStride);
//blend lcd
var aggPainer = (PixelFarm.Agg.AggPainter)p;
Blend(aggPainer.RenderSurface.DestActualImage, expanedGreyScaleBuffer, newGreyImgStride, glyphImg.Height);
//---------------
p.DrawImage(glyphImg, 0, 50);
}
void OnCanvasViewPaintSurface(object sender, SKPaintSurfaceEventArgs args)
{
SKImageInfo info = args.Info;
SKSurface surface = args.Surface;
SKCanvas canvas = surface.Canvas;
canvas.Clear();
//get image buffer from info
if (_needContentUpdate)
{
_painter.Clear(PixelFarm.Drawing.Color.Yellow);
_painter.StrokeColor = PixelFarm.Drawing.Color.Red;
_painter.StrokeWidth = 2;
_painter.DrawLine(0, 0, 100, 100);
_needContentUpdate = false;
}
//draw entire bmp or draw some part of it
canvas.DrawBitmap(_myCanvasBmp, 0, 0);
}
void RunSampleB(PixelFarm.Drawing.Painter p)
{
//version 2:
//1. create simple vertical line to test agg's lcd rendernig technique
//create gray-scale actual image
using (MemBitmap glyphBmp = new MemBitmap(100, 100))
{
AggPainter painter = AggPainter.Create(glyphBmp);
//
painter.StrokeColor = PixelFarm.Drawing.Color.Black;
painter.StrokeWidth = 2.0f;
painter.DrawLine(2, 0, 3, 15); //not need to scale3
//
//clear surface bg
p.Clear(PixelFarm.Drawing.Color.White);
//--------------------------
var aggPainer = (PixelFarm.CpuBlit.AggPainter)p;
BlendWithLcdTechnique(aggPainer.RenderSurface.DestBitmap, glyphBmp, PixelFarm.Drawing.Color.Black);
//---------------
p.DrawImage(glyphBmp, 0, 50);
//---------------
}
}
void RunSampleB(PixelFarm.Drawing.Painter p)
{
//version 2:
//1. create simple vertical line to test agg's lcd rendernig technique
//create gray-scale actual image
ActualImage glyphImg = new ActualImage(100, 100, PixelFormat.ARGB32);
AggRenderSurface glyph2d = new AggRenderSurface(glyphImg);
AggPainter painter = new AggPainter(glyph2d);
//
painter.StrokeColor = PixelFarm.Drawing.Color.Black;
painter.StrokeWidth = 2.0f;
painter.DrawLine(2, 0, 3, 15);//not need to scale3
//
//clear surface bg
p.Clear(PixelFarm.Drawing.Color.White);
//--------------------------
var aggPainer = (PixelFarm.Agg.AggPainter)p;
BlendWithLcdTechnique(aggPainer.RenderSurface.DestActualImage, glyphImg, PixelFarm.Drawing.Color.Black);
//---------------
p.DrawImage(glyphImg, 0, 50);
//---------------
}
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);
}
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();
}
}
