void BtnPreviewUpdateClick(object sender, EventArgs e)
{
if (String.IsNullOrEmpty(previewChar.Text) ||
String.IsNullOrEmpty(txtInput.Text))
return;
this.Cursor = Cursors.WaitCursor;
Glyph[] glyphs = new Glyph[previewChar.Text.Length];
Image[] images = new Image[previewChar.Text.Length];
uint[] indexes = new uint[previewChar.Text.Length];
uint charHeight = Convert.ToUInt32(numSize.Value);
GlyphRenderer.NewFace(txtInput.Text, charHeight);
for (int i = 0; i < previewChar.Text.Length; i++)
{
GlyphRenderer.CreateGlyph(Convert.ToUInt32(previewChar.Text[i]), out indexes[i], out glyphs[i], out images[i]);
}
Dictionary<KerningInfoKey, KerningInfo> kerningMap = new Dictionary<KerningInfoKey, KerningInfo>();
for (int i1 = 0; i1 < indexes.Length; i1++)
{
for (int i2 = 0; i2 < indexes.Length; i2++)
{
KerningInfo info = GlyphRenderer.CreateKerningInfo(indexes[i1], indexes[i2]);
if (info.HorizontalAdjust == 0 && info.VerticalAdjust == 0)
continue;
info.LeftChar = Convert.ToUInt32(previewChar.Text[i1]);
info.RightChar = Convert.ToUInt32(previewChar.Text[i2]);
KerningInfoKey key = new KerningInfoKey(info);
kerningMap[key] = info;
}
}
Image image = CreatePreviewImage(glyphs, images, kerningMap);//,
Image oldImage = null;
if (previewBox.Image != null)
oldImage = previewBox.Image;
if(image != null)
previewBox.Image = image;
if (oldImage != null)
oldImage.Dispose();
GlyphRenderer.DoneFace();
Cursor = Cursors.Default;
}
Image CreatePreviewImage(Glyph[] glyphs, Image[] images,
Dictionary<KerningInfoKey, KerningInfo> kerningMap)
{
int width = 0;
for (int i = 0; i < glyphs.Length; i++)
{
width += (int)glyphs[i].HorizontalAdvance;
}
int height = previewBox.Height*3;
if (height == 0)
return null;
Image image = new Bitmap( width>previewBox.Width ? width: previewBox.Width,
height);
Graphics g = Graphics.FromImage(image);
Point origin = new Point(0, height/2);
Pen pen = new Pen(Color.BlueViolet);
pen.DashStyle = DashStyle.Dash;
g.DrawLine(pen, origin, new Point(width, origin.Y));
for (int i = 0; i < glyphs.Length; i++)
{
int x = origin.X, y = origin.Y;
if (i != 0)
{
KerningInfoKey key = new KerningInfoKey((uint)previewChar.Text[i - 1],
(uint)previewChar.Text[i]);
if (kerningMap.ContainsKey(key))
{
x += (int)kerningMap[key].HorizontalAdjust;
y -= (int)kerningMap[key].VerticalAdjust;
origin.X += (int)kerningMap[key].HorizontalAdjust;
}
}
x += (int)glyphs[i].HorizontalBearingX;
y -= (int)glyphs[i].HorizontalBearingY;
origin.X += (int)glyphs[i].HorizontalAdvance;
if (images[i] == null)
continue;
g.DrawImage(images[i], x, y);
images[i].Dispose();
}
return image;
}