public static void SetHintTechnique(this GlyphPathBuilder builder, HintTechnique hintTech)
{
builder.UseTrueTypeInstructions = false; //reset
builder.UseVerticalHinting = false; //reset
switch (hintTech)
{
case HintTechnique.TrueTypeInstruction:
builder.UseTrueTypeInstructions = true;
break;
case HintTechnique.TrueTypeInstruction_VerticalOnly:
builder.UseTrueTypeInstructions = true;
builder.UseVerticalHinting = true;
break;
case HintTechnique.CustomAutoFit:
//custom agg autofit
builder.UseVerticalHinting = true;
break;
}
}
public static void Build(this GlyphPathBuilder builder, char c, float sizeInPoints)
{
builder.BuildFromGlyphIndex((ushort)builder.Typeface.LookupIndex(c), sizeInPoints);
}
public GlyphImage CreateGlyphImage(GlyphPathBuilder builder, float pxscale)
{
//1. create
var txToVxs = new GlyphTranslatorToVxs();
builder.ReadShapes(txToVxs);
//
//create new one
var glyphVxs = new VertexStore();
txToVxs.WriteOutput(glyphVxs, pxscale);
//find bound
//--------------------------------------------
//GlyphImage glyphImg = new GlyphImage()
RectD bounds = new RectD();
BoundingRect.GetBoundingRect(new VertexStoreSnap(glyphVxs), ref bounds);
////--------------------------------------------
int w = (int)System.Math.Ceiling(bounds.Width);
int h = (int)System.Math.Ceiling(bounds.Height);
if (w < 5)
{
w = 5;
}
if (h < 5)
{
h = 5;
}
////translate to positive quadrant
double dx = (bounds.Left < 0) ? -bounds.Left : 0;
double dy = (bounds.Bottom < 0) ? -bounds.Bottom : 0;
//we need some borders
int horizontal_margin = 1; //'margin' 1px
int vertical_margin = 1; //margin 1 px
dx += horizontal_margin; //+ left margin
dy += vertical_margin; //+ top margin
//--------------------------------------------
//create glyph img
w = (int)Math.Ceiling(dx + w + horizontal_margin); //+right margin
h = (int)Math.Ceiling(dy + h + vertical_margin); //+bottom margin
ActualImage img = new ActualImage(w, h, PixelFormat.ARGB32);
AggRenderSurface aggsx = new AggRenderSurface(img);
AggPainter painter = new AggPainter(aggsx);
if (TextureKind == TextureKind.StencilLcdEffect)
{
VertexStore vxs2 = new VertexStore();
glyphVxs.TranslateToNewVxs(dx + 0.33f, dy, vxs2); //offset to proper x of subpixel rendering ***
glyphVxs = vxs2;
//
painter.UseSubPixelLcdEffect = true;
//we use white glyph on black bg for this texture
painter.Clear(Color.Black);
painter.FillColor = Color.White;
painter.Fill(glyphVxs);
//apply sharpen filter
//painter.DoFilter(new RectInt(0, h, w, 0), 2);
//painter.DoFilter(new RectInt(0, h, w, 0), 2); //?
}
else
{
VertexStore vxs2 = new VertexStore();
glyphVxs.TranslateToNewVxs(dx, dy, vxs2);
glyphVxs = vxs2;
painter.UseSubPixelLcdEffect = false;
if (TextureKind == TextureKind.StencilGreyScale)
{
painter.Clear(Color.Empty);
painter.FillColor = Color.Black;
}
else
{
painter.Clear(BackGroundColor);
painter.FillColor = this.GlyphColor;
}
painter.Fill(glyphVxs);
}
//
var glyphImage = new GlyphImage(w, h);
glyphImage.TextureOffsetX = dx;
glyphImage.TextureOffsetY = dy;
glyphImage.SetImageBuffer(ActualImageExtensions.CopyImgBuffer(img, w), false);
//copy data from agg canvas to glyph image
return(glyphImage);
}
