public void PrepareStringForRenderVx(RenderVxFormattedString renderVx, char[] text, int startAt, int len)
{
//1. update some props..
//2. update current type face
UpdateGlyphLayoutSettings();
Typeface typeface = _currentTypeface;// _glyphPathBuilder.Typeface;
_glyphLayout.Typeface = typeface;
_glyphLayout.Layout(text, startAt, len);
//
//3. scale from design unit to specific font size
_outputPxScaledGlyphPlans.Clear();
_pxScaleEngine.Layout(_glyphLayout.ResultUnscaledGlyphPositions, _outputPxScaledGlyphPlans);
TextPrinterHelper.CopyGlyphPlans(renderVx, _outputUnscaledGlyphPlans, this._currentFontSizePxScale);
}
public void Draw()
{
PxScaledGlyphPlanList glyphPlans = _line._glyphPlans;
List <UserCodePointToGlyphIndex> userCharToGlyphIndexMap = _line._userCodePointToGlyphIndexMap;
if (_line.ContentChanged)
{
//TODO: or font face/font-size change
//re-calculate
char[] textBuffer = _line._charBuffer.ToArray();
glyphPlans.Clear();
userCharToGlyphIndexMap.Clear();
//read glyph plan and userCharToGlyphIndexMap
_printer.GenerateGlyphPlan(textBuffer, 0, textBuffer.Length, glyphPlans, userCharToGlyphIndexMap);
_line.ContentChanged = false;
}
if (glyphPlans.Count > 0)
{
_printer.DrawFromGlyphPlans(glyphPlans, X, Y);
//draw caret
//not blink in this version
int caret_index = _line.CaretCharIndex;
//find caret pos based on glyph plan
//TODO: check when do gsub (glyph number may not match with user char number)
if (caret_index == 0)
{
_printer.DrawCaret(X, this.Y);
}
else
{
//UserCodePointToGlyphIndex map = userCharToGlyphIndexMap[caret_index - 1];
//GlyphPlan p = glyphPlans[map.glyphIndexListOffset_plus1 + map.len - 2];
//_printer.DrawCaret(X + (p.ExactX + p.AdvanceX), this.Y);
}
}
else
{
_printer.DrawCaret(X, this.Y);
}
}