private void button3_Click(object sender, EventArgs e)
{
//it should be faster if we use 'mesh' cache
//instead of read-transform it every time like code above(button2_click)
LoadFont();
float font_size_in_Point = 20;
_glyphMeshStore.SetFont(_latinModernMathFont, font_size_in_Point);//20= font size
_glyphMeshStore.FlipGlyphUpward = true;
float px_scale = _latinModernMathFont.CalculateScaleToPixelFromPointSize(font_size_in_Point);
using (Tools.BorrowAggPainter(_memBmp, out var p))
{
p.Clear(PixelFarm.Drawing.Color.White);
float prevX = p.OriginX;
float prevY = p.OriginY;
int line_left = 10;
int line_top = 50;
p.SetOrigin(line_left, line_top);//*** test
//draw reference point
p.FillRect(0, 0, 5, 5, PixelFarm.Drawing.Color.Red);
char[] test_str = "‽_x‾".ToCharArray();
int inline_left = 0;
int inline_top = 0;
//----------
GlyphLayout glyphLayout = new GlyphLayout();
glyphLayout.ScriptLang = new ScriptLang("math");
glyphLayout.Typeface = _latinModernMathFont;
//temp fix for some typeface
glyphLayout.SetGlyphIndexNotFoundHandler((glyph_layout, codepoint, next_codepoint) =>
{
switch (codepoint)
{
//overline unicode
case 8254: return(2246); //overline-combine, this will break into 3 parts in math layout process
}
return(0);
});
//
glyphLayout.Layout(test_str, 0, test_str.Length);
List <UnscaledGlyphPlan> glyphPlans = new List <UnscaledGlyphPlan>();
foreach (UnscaledGlyphPlan glypyPlan in glyphLayout.GetUnscaledGlyphPlanIter())
{
glyphPlans.Add(glypyPlan);
}
//--------
for (int i = 0; i < glyphPlans.Count; ++i)
{
//ushort glyphIndex = _latinModernMathFont.GetGlyphIndex((int)test_str[i]);
////do some glyph-substitution
//ushort advW = _latinModernMathFont.GetAdvanceWidth((int)test_str[i]);//unscale glyph width
//now scale it to specific font size
UnscaledGlyphPlan glyphPlan = glyphPlans[i];
int advW_s = (int)System.Math.Round(px_scale * glyphPlan.AdvanceX);
VertexStore v1 = _glyphMeshStore.GetGlyphMesh(glyphPlan.glyphIndex);
p.SetOrigin(line_left + inline_left, line_top + inline_top);
p.Fill(v1, PixelFarm.Drawing.Color.Black);
inline_left += advW_s;//move
}
//restore
p.SetOrigin(prevX, prevY);
}
//-----------
CopyBitmapToScreen();
}