public void DrawString(RenderVxFormattedString renderVx, double x, double y)
{
//TODO: review here
float ox = _painter.OriginX;
float oy = _painter.OriginY;
//1. update some props..
//2. update current type face
UpdateGlyphLayoutSettings();
_glyphMeshStore.SetFont(_currentTypeface, this.FontSizeInPoints);
_glyphMeshStore.SimulateOblique = this.SimulateSlant;
//3. layout glyphs with selected layout technique
//TODO: review this again, we should use pixel?
float fontSizePoint = this.FontSizeInPoints;
float scale = _currentTypeface.CalculateScaleToPixelFromPointSize(fontSizePoint);
RenderVxGlyphPlan[] glyphPlans = renderVx.GlyphList;
int j = glyphPlans.Length;
//---------------------------------------------------
//consider use cached glyph, to increase performance
//GlyphPosPixelSnapKind x_snap = this.GlyphPosPixelSnapX;
//GlyphPosPixelSnapKind y_snap = this.GlyphPosPixelSnapY;
float g_x = 0;
float g_y = 0;
float baseY = (int)y;
for (int i = 0; i < j; ++i)
{
RenderVxGlyphPlan glyphPlan = glyphPlans[i];
//-----------------------------------
//TODO: review here ***
//PERFORMANCE revisit here
//if we have create a vxs we can cache it for later use?
//-----------------------------------
VertexStore vxs = _glyphMeshStore.GetGlyphMesh(glyphPlan.glyphIndex);
g_x = (float)(glyphPlan.x * scale + x);
g_y = (float)glyphPlan.y * scale;
_painter.SetOrigin(g_x, g_y);
_painter.Fill(vxs);
}
//restore prev origin
_painter.SetOrigin(ox, oy);
}
protected override void SetGlyphVxs(GlyphBox glyphBox, Typeface typeface, float sizeInPoint)
{
if (glyphBox is VxsGlyphBox vxsGlyphBox)
{
_glyphMeshStore.SetFont(typeface, sizeInPoint);//20= font size
_glyphMeshStore.FlipGlyphUpward = true;
if (glyphBox.IsItalic)
{
_glyphMeshStore.SimulateOblique = glyphBox.IsItalic;
}
vxsGlyphBox.GlyphVxs = _glyphMeshStore.GetGlyphMesh(glyphBox.GlyphIndex);
if (_glyphMeshStore.SimulateOblique)
{
_glyphMeshStore.SimulateOblique = false;
}
}
}
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();
}
GlyphBitmap GetGlyphBitmapFromColorOutlineGlyph(ushort glyphIndex, GlyphMeshStore glyphMeshStore, ushort colorLayerStart)
{
//not found=> create a newone
Typography.OpenFont.Tables.COLR _colrTable = _typeface.COLRTable;
Typography.OpenFont.Tables.CPAL _cpalTable = _typeface.CPALTable;
Q1RectD totalBounds = Q1RectD.ZeroIntersection();
{
//calculate bounds of this glyph
ushort colorLayerCount = _colrTable.LayerCounts[glyphIndex];
for (int c = colorLayerStart; c < colorLayerStart + colorLayerCount; ++c)
{
BoundingRect.GetBoundingRect(glyphMeshStore.GetGlyphMesh(_colrTable.GlyphLayers[c]), ref totalBounds);
}
}
//dbugExportCount++;
var memBmp = new MemBitmap((int)Math.Round(totalBounds.Width), (int)Math.Round(totalBounds.Height));//???
int offset_x = 0;
int offset_y = 0;
using (Tools.BorrowAggPainter(memBmp, out AggPainter painter))
{
painter.Clear(Color.Transparent);
painter.SetOrigin(0, 0);
offset_x = -(int)(totalBounds.Left);
offset_y = -(int)(totalBounds.Bottom);
ushort colorLayerCount = _colrTable.LayerCounts[glyphIndex];
int palette = 0; // FIXME: assume palette 0 for now
for (int c = colorLayerStart; c < colorLayerStart + colorLayerCount; ++c)
{
_cpalTable.GetColor(
_cpalTable.Palettes[palette] + _colrTable.GlyphPalettes[c], //index
out byte r, out byte g, out byte b, out byte a);
ushort gIndex = _colrTable.GlyphLayers[c];
VertexStore vxs = glyphMeshStore.GetGlyphMesh(gIndex);
using (Tools.BorrowVxs(out var v1))
{
vxs.TranslateToNewVxs(offset_x, offset_y, v1);
painter.FillColor = new Color(r, g, b);//? a component
painter.Fill(v1);
}
}
//find ex
#if DEBUG
//memBmp.SaveImage("a0x" + (dbugExportCount) + ".png");
#endif
}
return(new GlyphBitmap
{
Bitmap = memBmp,
Width = memBmp.Width,
Height = memBmp.Height,
ImageStartX = -offset_x, //offset back
ImageStartY = -offset_y //offset back
});
}
