public TextGenerator(string path, string fontName, uint fontSize = 12)
{
if (_textPs == null)
{
LoadProgramShader();
}
FontName = fontName;
FontSize = fontSize;
SharpFont.Library fontLib = new SharpFont.Library();
SharpFont.Face fontFace = new SharpFont.Face(fontLib, path);
fontFace.SetPixelSizes(0, FontSize);
GL.PixelStore(PixelStoreParameter.UnpackAlignment, 1);
for (char c = (char)0x20; c <= (char)0x7E; c++)
{
fontFace.LoadChar(c, LoadFlags.Render, LoadTarget.Normal);
Texture texture = Texture.CreateTexture(
fontFace.Glyph.Bitmap.Width,
fontFace.Glyph.Bitmap.Rows,
PixelInternalFormat.R8,
PixelFormat.Red,
fontFace.Glyph.Bitmap.Buffer);
Character character = new Character(
texture.ID,
new Vector2(fontFace.Glyph.Bitmap.Width, fontFace.Glyph.Bitmap.Rows),
new Vector2(fontFace.Glyph.BitmapLeft, fontFace.Glyph.BitmapTop),
(int)fontFace.Glyph.Advance.X);
_characters.Add(c, character);
}
fontFace.Dispose();
fontLib.Dispose();
vao = VAO.Create();
vao.LinkPS(_textPs);
vbo = VBO.Create <float>(vertices.Length, 4, "vertex");
indices = new IndicesCollection();
indices.Add(4, vertices.Length);
vao.AddVBuff(vbo);
vao.AddIndicesCollection(indices);
}
/// <summary>
/// Releases all resources used by the <see cref="Text"/>.
/// </summary>
public void Dispose()
{
if (_stroker != null && !_stroker.IsDisposed)
{
_stroker.Dispose();
}
if (_face != null && !_face.IsDisposed)
{
_face.Dispose();
}
if (_library != null && !_library.IsDisposed)
{
_library.Dispose();
}
_pages = null;
_fontData = null;
}
private void Clear()
{
try {
if (Font != null)
{
Font.Dispose();
Font = null;
}
GL.BindTexture(TextureTarget.Texture2D, 0);
if (GlyphCount > 0)
{
if (m_ListBase > 0)
{
GL.DeleteLists(m_ListBase, GlyphCount);
}
else if (!CharMap.IsNullOrEmpty())
{
CharMap.Values.Select(val => val.ListID).ForEach(lid => GL.DeleteLists(lid, 1));
CharMap.Clear();
}
}
if (!m_Textures.IsNullOrEmpty())
{
GL.DeleteTextures(m_Textures.Length, m_Textures);
}
} catch (Exception ex) {
ex.LogError();
} finally {
GlyphCount = 0;
m_ListBase = 0;
m_Textures = null;
Height = 0;
Count = 0;
m_EllipsisGlyphIndex = GlyphInfo.Empty;
}
}
private void InitFont(float scaleFactor)
{
try {
System.Diagnostics.Stopwatch sw = System.Diagnostics.Stopwatch.StartNew();
ScaleFactor = scaleFactor;
YOffsetScaled = YOffset * scaleFactor;
// Reset everything
Clear();
Font = new Face(FontManager.Library, FilePath);
// Go on
float size = Size.Scale(ScaleFactor);
Fixed26Dot6 sz = new Fixed26Dot6(size / 64);
Font.SetCharSize(sz, sz, 72, 72);
int pixelSize = (size * 1.3334).Ceil();
Font.SetPixelSizes((uint)pixelSize, (uint)pixelSize);
GlyphCount = Font.GlyphCount;
int glyphCount = GlyphCount;
Monospace = Font.FaceFlags.HasFlag(FaceFlags.FixedWidth);
string tmpName = Font.GetPostscriptName();
if (!String.IsNullOrEmpty(tmpName))
{
Name = tmpName;
}
// We support 4 different glyph loading strategies:
//
// (1) All: all glyphs loaded at once on start
// (2) Filtered: all filtered glyphs loaded at once on start
// (3) OnDemand: no glyphs loaded at start, all glyphs on demand
if (OnDemand)
{
// Startegy (3)
GlyphCount = 0;
}
else if (Filter > GlyphFilterFlags.OnDemand)
{
// Startegy (2)
// If we have a Filter set, let's count the number of valid glyphs
// to minimize graphics memory.
uint glyphindex;
uint cc = Font.GetFirstChar(out glyphindex);
int count = 0;
while (glyphindex > 0)
{
char c = (char)cc;
if (Filter.IsValid(c))
{
count++;
}
cc = Font.GetNextChar(cc, out glyphindex);
}
GlyphCount = count;
}
else
{
// Strategy (1), loading the entire font
}
m_Textures = new int[Math.Max(32, GlyphCount)];
CharMap = new ThreadSafeDictionary <char, GlyphInfo>(Math.Max(31, GlyphCount));
if (!OnDemand)
{
// Strategy (1) + (2): Load all or filtered glyphs
m_ListBase = GL.GenLists(GlyphCount);
GL.GenTextures(GlyphCount, m_Textures);
uint glyphindex;
uint cc = Font.GetFirstChar(out glyphindex);
while (glyphindex > 0)
{
char c = (char)cc;
if (!CharMap.ContainsKey(c) && Filter.IsValid(c))
{
try {
CharMap.Add(c, CompileCharacter(Font, glyphindex, c));
} catch (Exception ex) {
ex.LogWarning();
}
}
cc = Font.GetNextChar(cc, out glyphindex);
}
CharMap.TryGetValue(SpecialCharacters.Ellipsis, out m_EllipsisGlyphIndex);
}
else
{
try {
GetGlyphIndex(SpecialCharacters.Ellipsis, out m_EllipsisGlyphIndex);
} catch (Exception ex) {
ex.LogError();
}
}
//if (Height <= 1)
//Height = pixelSize.NextPowerOf2();
//Height = pixelSize * 1.33335f;
Height = pixelSize;
float fscale = Height / Font.Height * 1.33334f;
//float fscale = Height / Font.Height * 0.776f;
Ascender = Font.Ascender * fscale;
Descender = Font.Descender * fscale;
//HalfHeight = Height / 2;
Height = (Ascender).Ceil();
HalfHeight = (int)(Height / 2);
//LineHeight = Height * 1.42f * LineSpacing;
LineHeight = (int)((Height * 1.42f * LineSpacing) + 0.5f);
//TextBoxHeight = ((Height * 2f) + (ScaleFactor * 2f)).Ceil();
//TextBoxHeight = (int)(Height * 1.85f + 0.5f);
TextBoxHeight = (int)(Height * 1.85f + 2);
CaptionHeight = (int)(Height * 1.55 + 2);
YOffsetScaled = (YOffset * ScaleFactor) - HalfHeight;
if (OnDemand)
{
Count.LogInformation("Font {0} ({1}), {2}/{3} glyphs pre-loaded in {4} ms, more glyphs are loaded on demand.", Name, Size, Count, glyphCount, sw.ElapsedMilliseconds);
}
else
{
Count.LogInformation("Font {0} ({1}), {2}/{3} glyphs loaded in {4} ms.", Name, Size, Count, glyphCount, sw.ElapsedMilliseconds);
}
} catch (Exception ex) {
ex.LogError();
} finally {
if (!OnDemand && Font != null)
{
Font.Dispose();
Font = null;
}
}
}