public void DrawString(char[] text, int startAt, int len, double x, double y)
{
float ox = canvasPainter.OriginX;
float oy = canvasPainter.OriginY;
//1. update some props..
//2. update current type face
UpdateTypefaceAndGlyphBuilder();
Typeface typeface = _glyphPathBuilder.Typeface;
//3. layout glyphs with selected layout technique
//TODO: review this again, we should use pixel?
float fontSizePoint = this.FontSizeInPoints;
float scale = typeface.CalculateToPixelScaleFromPointSize(fontSizePoint);
_outputGlyphPlans.Clear();
_glyphLayout.Layout(typeface, text, startAt, len, _outputGlyphPlans);
//4. render each glyph
int j = _outputGlyphPlans.Count;
//---------------------------------------------------
//consider use cached glyph, to increase performance
hintGlyphCollection.SetCacheInfo(typeface, fontSizePoint, this.HintTechnique);
//---------------------------------------------------
for (int i = 0; i < j; ++i)
{
GlyphPlan glyphPlan = _outputGlyphPlans[i];
//-----------------------------------
//TODO: review here ***
//PERFORMANCE revisit here
//if we have create a vxs we can cache it for later use?
//-----------------------------------
VertexStore glyphVxs;
if (!hintGlyphCollection.TryGetCacheGlyph(glyphPlan.glyphIndex, out glyphVxs))
{
//if not found then create new glyph vxs and cache it
_glyphPathBuilder.SetHintTechnique(this.HintTechnique);
_glyphPathBuilder.BuildFromGlyphIndex(glyphPlan.glyphIndex, fontSizePoint);
//-----------------------------------
_tovxs.Reset();
_glyphPathBuilder.ReadShapes(_tovxs);
//TODO: review here,
//float pxScale = _glyphPathBuilder.GetPixelScale();
glyphVxs = new VertexStore();
_tovxs.WriteOutput(glyphVxs, _vxsPool);
//
hintGlyphCollection.RegisterCachedGlyph(glyphPlan.glyphIndex, glyphVxs);
}
canvasPainter.SetOrigin((float)(glyphPlan.x * scale + x), (float)(glyphPlan.y * scale + y));
canvasPainter.Fill(glyphVxs);
}
//restore prev origin
canvasPainter.SetOrigin(ox, oy);
}
public override void DrawGlyphPlanList(List <GlyphPlan> glyphPlanList, int startAt, int len, float xpos, float ypos)
{
CanvasPainter canvasPainter = this.TargetCanvasPainter;
Typeface typeface = _glyphPathBuilder.Typeface;
//3. layout glyphs with selected layout technique
//TODO: review this again, we should use pixel?
float fontSizePoint = this.FontSizeInPoints;
float scale = typeface.CalculateFromPointToPixelScale(fontSizePoint);
//4. render each glyph
float ox = canvasPainter.OriginX;
float oy = canvasPainter.OriginY;
int endBefore = startAt + len;
//---------------------------------------------------
//consider use cached glyph, to increase performance
hintGlyphCollection.SetCacheInfo(typeface, fontSizePoint, this.HintTechnique);
//---------------------------------------------------
for (int i = startAt; i < endBefore; ++i)
{
GlyphPlan glyphPlan = glyphPlanList[i];
//-----------------------------------
//TODO: review here ***
//PERFORMANCE revisit here
//if we have create a vxs we can cache it for later use?
//-----------------------------------
VertexStore glyphVxs;
if (!hintGlyphCollection.TryGetCacheGlyph(glyphPlan.glyphIndex, out glyphVxs))
{
//if not found then create new glyph vxs and cache it
_glyphPathBuilder.BuildFromGlyphIndex(glyphPlan.glyphIndex, fontSizePoint);
//-----------------------------------
_tovxs.Reset();
_glyphPathBuilder.ReadShapes(_tovxs);
//TODO: review here,
//float pxScale = _glyphPathBuilder.GetPixelScale();
glyphVxs = new VertexStore();
_tovxs.WriteOutput(glyphVxs, _vxsPool);
//
hintGlyphCollection.RegisterCachedGlyph(glyphPlan.glyphIndex, glyphVxs);
}
canvasPainter.SetOrigin((float)(glyphPlan.x * scale + xpos), (float)(glyphPlan.y * scale + ypos));
canvasPainter.Fill(glyphVxs);
}
//restore prev origin
canvasPainter.SetOrigin(ox, oy);
}