public void Print(CanvasPainter painter, char[] buffer, double x, double y)
{
int j = buffer.Length;
int buffsize = j * 2;
//get kerning list
ProperGlyph[] properGlyphs = new ProperGlyph[buffsize];
ActualFont implFont = actualFont;
TextShapingService.GetGlyphPos(actualFont, buffer, 0, buffsize, properGlyphs);
double xpos = x;
for (int i = 0; i < buffsize; ++i)
{
uint codepoint = properGlyphs[i].codepoint;
if (codepoint == 0)
{
break;
}
//-------------------------------------------------------------
FontGlyph glyph = implFont.GetGlyphByIndex(codepoint);
//var left = glyph.glyphMatrix.img_horiBearingX;
//--------------------------------------------------------
//render with vector
//var mat = Agg.Transform.Affine.NewMatix(
//Agg.Transform.AffinePlan.Scale(0.30),
//Agg.Transform.AffinePlan.Translate(xpos, y));
//var vxs1 = mat.TransformToVxs(glyph.flattenVxs);
VertexStore vxs1 = Agg.Transform.Affine.TranslateToVxs(
glyph.flattenVxs,
(float)(xpos),
(float)(y),
vxsPool.GetFreeVxs());
painter.Fill(vxs1);
vxsPool.Release(ref vxs1);
//--------------------------------------------------------
////render with bitmap
//if (glyph.glyphImage32 != null)
//{
// if (glyph.glyphImage32.Width > 0 && glyph.glyphImage32.Height > 0)
// {
// painter.DrawImage(glyph.glyphImage32,
// (float)(xpos + (left >> 6)),
// (float)(y + (glyph.exportGlyph.bboxYmin >> 6)));
// }
//}
int w = (glyph.glyphMatrix.advanceX) >> 6;
xpos += (w);
//-------------------------------------------------------------
}
}
public static void GetGlyphPos(ActualFont actualFont, char[] buffer, int startAt, int len, ProperGlyph[] properGlyphs)
{
defaultSharpingService.GetGlyphPosImpl(actualFont, buffer, startAt, len, properGlyphs);
}
protected abstract void GetGlyphPosImpl(ActualFont actualFont, char[] buffer, int startAt, int len, ProperGlyph[] properGlyphs);
public static unsafe extern int MyFtShaping(IntPtr my_hb_ft_font,
char* text,
int charCount,
ProperGlyph* properGlyphs);
protected override void GetGlyphPosImpl(ActualFont actualFont, char[] buffer, int startAt, int len, ProperGlyph[] properGlyphs)
{
//do shaping and set text layout
}
public override void DrawString(string text, double x, double y)
{
char[] chars = text.ToCharArray();
int j = chars.Length;
int buffsize = j * 2;
//get kerning list
//get actual font for this canvas
TextureFont currentFont = _currentTextureFont;
SimpleFontAtlas fontAtlas = currentFont.FontAtlas;
ProperGlyph[] properGlyphs = new ProperGlyph[buffsize];
TextShapingService.GetGlyphPos(currentFont, chars, 0, buffsize, properGlyphs);
GLBitmap glBmp = (GLBitmap)currentFont.GLBmp;
if (glBmp == null)
{
//create glbmp
GlyphImage glyphImage = fontAtlas.TotalGlyph;
int[] buffer = glyphImage.GetImageBuffer();
glBmp = new GLBitmap(glyphImage.Width, glyphImage.Height, buffer, false);
}
//int j = chars.Length;
//
float c_x = (float)x;
float c_y = (float)y;
//TODO: review here ***
//-----------------
//1. layout each glyph before render ***
//
float baseline = c_y - 24;//eg line height= 24 //create a list
//--------------
List<float> coords = new List<float>();
float scale = 1f;
for (int i = 0; i < buffsize; ++i)
{
ProperGlyph glyph1 = properGlyphs[i];
uint codepoint = properGlyphs[i].codepoint;
if (codepoint == 0)
{
break;
}
//--------------------------------
//if (codepoint == 1173 && i > 1)
//{
// //check prev code point
// codepoint = 1168;
//}
//--------------------------------
TextureFontGlyphData glyphData;
if (!fontAtlas.GetRectByCodePoint((int)codepoint, out glyphData))
{
//Rectangle r = glyphData.Rect;
//float x_min = glyphData.BBoxXMin / 64;
////draw each glyph at specific position
////_canvas.DrawSubImageWithMsdf(glBmp, ref r, c_x + x_min, (float)(baseline + r.Height));
//_canvas.DrawSubImageWithMsdf(glBmp, ref r, c_x + x_min, (float)(baseline + r.Height));
////c_x += r.Width - 10;
//c_x += (glyphData.AdvanceX / 64);
continue;
}
FontGlyph glyph = currentFont.GetGlyphByIndex(codepoint);
int left = ((int)(glyph.glyphMatrix.img_horiBearingX * scale) >> 6);
Rectangle r = glyphData.Rect;
int adjustX = 0;
int bboxYMin = glyph.glyphMatrix.bboxYmin >> 6;
if (bboxYMin > 1 || bboxYMin < -1)
{
// adjustX = 3;
}
//scale down 0.8;
//_canvas.DrawSubImageWithMsdf(glBmp, ref r, adjustX + c_x + left,
// (float)(baseline + ((int)(glyphData.ImgHeight + glyph.glyphMatrix.bboxYmin) >> 6)), 1.1f);
coords.Add(r.Left);
coords.Add(r.Top);
coords.Add(r.Width);
coords.Add(r.Height);
//-------------------------
coords.Add(adjustX + c_x + left);
//coords.Add(baseline + ((int)((glyphData.ImgHeight + glyph.glyphMatrix.bboxYmin) * scale) >> 6));
coords.Add(baseline + ((int)((glyphData.ImgHeight + glyphData.BBoxYMin) * scale) >> 6));
//int w = (int)(glyph.glyphMatrix.advanceX * scale) >> 6;
int w = (int)(glyph.horiz_adv_x * scale) >> 6;
c_x += w;
}
_canvas.DrawSubImageWithMsdf(glBmp, coords.ToArray(), scale);
}
