public NOpenTypeFontFace(Typeface ntypeface, string fontName, string fontPath)
{
this.ntypeface = ntypeface;
this.name = fontName;
this.path = fontPath;
//----
glyphPathBuilder = new Agg.GlyphPathBuilderVxs(ntypeface);
}
//from http://www.w3schools.com/tags/ref_pxtoemconversion.asp
//set default
// 16px = 1 em
//-------------------
//1. conv font design unit to em
// em = designUnit / unit_per_Em
//2. conv font design unit to pixels
// float scale = (float)(size * resolution) / (pointsPerInch * _typeface.UnitsPerEm);
void RenderWithMiniAgg(Typeface typeface, char testChar, float sizeInPoint)
{
//2. glyph-to-vxs builder
var builder = new GlyphPathBuilderVxs(typeface);
builder.Build(testChar, sizeInPoint);
VertexStore vxs = builder.GetVxs();
//5. use PixelFarm's Agg to render to bitmap...
//5.1 clear background
p.Clear(PixelFarm.Drawing.Color.White);
if (chkFillBackground.Checked)
{
//5.2
p.FillColor = PixelFarm.Drawing.Color.Black;
//5.3
p.Fill(vxs);
}
if (chkBorder.Checked)
{
//5.4
p.StrokeColor = PixelFarm.Drawing.Color.Green;
//user can specific border width here...
//p.StrokeWidth = 2;
//5.5
p.Draw(vxs);
}
//6. use this util to copy image from Agg actual image to System.Drawing.Bitmap
BitmapHelper.CopyToWindowsBitmap(destImg, winBmp, new RectInt(0, 0, 300, 300));
//---------------
//7. just render our bitmap
g.Clear(Color.White);
g.DrawImage(winBmp, new Point(10, 0));
}
public void Print(Typeface typeface, float size, char[] str, GlyphPlan[] glyphPlanBuffer)
{
//check if we have created a glyph cache
GlyphsCache glyphCache;
if (!_glyphCaches.TryGetValue(typeface, out glyphCache))
{
//create new
glyphCache = new GlyphsCache(typeface);
_glyphCaches.Add(typeface, glyphCache);
}
//----------------------------------------------
//1. convert char[] to glyph[]
//2. send to shaping engine
//3. layout position of each glyph
//----------------------------------------------
var glyphPathBuilder = new GlyphPathBuilderVxs(typeface);
int j = str.Length;
if (j > 1)
{
//for debug
}
//TODO:....
//2.
//shaping, glyph substitution
for (int i = 0; i < j; ++i)
{
var glyphPlan = new GlyphPlan();
glyphPlan.glyphIndex = (ushort)typeface.LookupIndex(str[i]);
glyphPlanBuffer[i] = glyphPlan;
}
float scale = typeface.CalculateScale(size);
float cx = 0;
float cy = 0;
bool enable_kerning = this.EnableKerning;
for (int i = 0; i < j; ++i)
{
GlyphPlan glyphPlan = glyphPlanBuffer[i];
ushort glyIndex = glyphPlan.glyphIndex;
//-----------------------------------
//check if we static vxs/bmp for this glyph
//if not, create and cache
//-----------------------------------
glyphPathBuilder.BuildFromGlyphIndex(glyIndex, size);
//-----------------------------------
var vxs = glyphPathBuilder.GetVxs();
//this advWidth in font design unit
float advWidth = typeface.GetAdvanceWidthFromGlyphIndex(glyIndex) * scale;
//----------------------------------
glyphPlan.x = cx;
glyphPlan.y = 0;
glyphPlan.advX = advWidth;
glyphPlan.vxs = vxs;
//
if (enable_kerning && i > 0)
{
//check kerning
advWidth += typeface.GetKernDistance(glyphPlanBuffer[i - 1].glyphIndex, glyphPlanBuffer[i].glyphIndex) * scale;
}
cx += advWidth;
}
//TODO:....
//2.
//shaping, glyph substitution
//3. layout glyph position
//----------------------------------------------
//4. actual render
}