/// <summary>
/// Add a character.
/// </summary>
/// <param name="codePoint">Codepoint.</param>
unsafe void AddCharacter(uint codePoint)
{
// Handle Tab
if (codePoint == (uint)'\t')
{
var spaceGlyph = GetGlyph((uint)' ');
glyphs.Add(codePoint, new GlyphInfo(spaceGlyph.AdvanceX * 5, spaceGlyph.AdvanceY, spaceGlyph.CharIndex));
return;
}
// Check if Glyph exists
uint index = FT.FT_Get_Char_Index(facePtr, codePoint);
if (index == 0)
{
if (codePoint == (uint)'?')
{
throw new Exception("Font does not contain required character '?'");
}
glyphs.Add(codePoint, GetGlyph((uint)'?'));
return;
}
// Render the glyph
FT.FT_Load_Glyph(facePtr, index, FT.FT_LOAD_DEFAULT | FT.FT_LOAD_TARGET_NORMAL);
var faceRec = (FT.FaceRec)Marshal.PtrToStructure(facePtr, typeof(FT.FaceRec));
FT.FT_Render_Glyph(faceRec.glyph, FT.FT_RENDER_MODE_NORMAL);
var glyphRec = (FT.GlyphSlotRec)Marshal.PtrToStructure(faceRec.glyph, typeof(FT.GlyphSlotRec));
//Check for glyph that is only spacing
if (glyphRec.bitmap.width == 0 || glyphRec.bitmap.rows == 0)
{
glyphs.Add(codePoint, new GlyphInfo(
(int)Math.Ceiling(FTMath.From26Dot6(glyphRec.advance.x)),
(int)Math.Ceiling(FTMath.From26Dot6(glyphRec.advance.y)),
index
));
return;
}
var pixels = new RGBA[glyphRec.bitmap.width * glyphRec.bitmap.rows];
if (glyphRec.bitmap.pixel_mode == 2)
{
byte *data = (byte *)glyphRec.bitmap.buffer;
for (int i = 0; i < glyphRec.bitmap.width * glyphRec.bitmap.rows; i++)
{
// TODO: 4 bytes used for 1 byte of alpha data? investigate compression with GL_RED and shader.
pixels [i] = new RGBA(255, 255, 255, data [i]);
}
}
else
{
throw new NotImplementedException();
}
if (currentX + glyphRec.bitmap.width > TEXTURE_SIZE)
{
currentX = 0;
currentY += lineMax;
lineMax = 0;
}
if (currentY + glyphRec.bitmap.rows > TEXTURE_SIZE)
{
currentX = 0;
currentY = 0;
lineMax = 0;
pages.Add(GetNewTexture());
}
lineMax = Math.Max(lineMax, glyphRec.bitmap.rows);
var rect = new Rectangle(currentX, currentY, glyphRec.bitmap.width, glyphRec.bitmap.rows);
var tex = pages [pages.Count - 1];
tex.SetData(pixels, rect);
currentX += glyphRec.bitmap.width;
var glyphInfo = new GlyphInfo(
t: tex,
r: rect,
advX: (int)Math.Ceiling(FTMath.From26Dot6(glyphRec.advance.x)),
advY: (int)Math.Ceiling(FTMath.From26Dot6(glyphRec.advance.y)),
horzAdv: (int)Math.Ceiling(FTMath.From26Dot6(glyphRec.metrics.horiAdvance)),
xOff: glyphRec.bitmap_left,
yOff: glyphRec.bitmap_top,
idx: index
);
glyphs.Add(codePoint, glyphInfo);
}
/// <summary>
/// Add a character.
/// </summary>
/// <param name="codePoint">Codepoint.</param>
unsafe void AddCharacter(uint codePoint)
{
// Handle Tab
if (codePoint == (uint) '\t') {
var spaceGlyph = GetGlyph ((uint) ' ');
glyphs.Add (codePoint, new GlyphInfo (spaceGlyph.AdvanceX * 5, spaceGlyph.AdvanceY, spaceGlyph.CharIndex));
return;
}
// Check if Glyph exists
uint index = FT.FT_Get_Char_Index (facePtr, codePoint);
if (index == 0) {
if (codePoint == (uint) '?')
throw new Exception ("Font does not contain required character '?'");
glyphs.Add (codePoint, GetGlyph ((uint) '?'));
return;
}
// Render the glyph
FT.FT_Load_Glyph (facePtr, index, FT.FT_LOAD_DEFAULT | FT.FT_LOAD_TARGET_NORMAL);
var faceRec = (FT.FaceRec) Marshal.PtrToStructure (facePtr, typeof(FT.FaceRec));
FT.FT_Render_Glyph (faceRec.glyph, FT.FT_RENDER_MODE_NORMAL);
var glyphRec = (FT.GlyphSlotRec) Marshal.PtrToStructure (faceRec.glyph, typeof(FT.GlyphSlotRec));
//Check for glyph that is only spacing
if (glyphRec.bitmap.width == 0 || glyphRec.bitmap.rows == 0) {
glyphs.Add (codePoint, new GlyphInfo (
(int) Math.Ceiling (FTMath.From26Dot6 (glyphRec.advance.x)),
(int) Math.Ceiling (FTMath.From26Dot6 (glyphRec.advance.y)),
index
));
return;
}
var pixels = new RGBA[glyphRec.bitmap.width * glyphRec.bitmap.rows];
if (glyphRec.bitmap.pixel_mode == 2) {
byte* data = (byte*) glyphRec.bitmap.buffer;
for (int i = 0; i < glyphRec.bitmap.width * glyphRec.bitmap.rows; i++) {
// TODO: 4 bytes used for 1 byte of alpha data? investigate compression with GL_RED and shader.
pixels [i] = new RGBA (255, 255, 255, data [i]);
}
} else {
throw new NotImplementedException ();
}
if (currentX + glyphRec.bitmap.width > TEXTURE_SIZE) {
currentX = 0;
currentY += lineMax;
lineMax = 0;
}
if (currentY + glyphRec.bitmap.rows > TEXTURE_SIZE) {
currentX = 0;
currentY = 0;
lineMax = 0;
pages.Add (GetNewTexture ());
}
lineMax = Math.Max (lineMax, glyphRec.bitmap.rows);
var rect = new Rectangle (currentX, currentY, glyphRec.bitmap.width, glyphRec.bitmap.rows);
var tex = pages [pages.Count - 1];
tex.SetData (pixels, rect);
currentX += glyphRec.bitmap.width;
var glyphInfo = new GlyphInfo (
t: tex,
r: rect,
advX: (int) Math.Ceiling (FTMath.From26Dot6 (glyphRec.advance.x)),
advY: (int) Math.Ceiling (FTMath.From26Dot6 (glyphRec.advance.y)),
horzAdv: (int) Math.Ceiling (FTMath.From26Dot6 (glyphRec.metrics.horiAdvance)),
xOff: glyphRec.bitmap_left,
yOff: glyphRec.bitmap_top,
idx: index
);
glyphs.Add (codePoint, glyphInfo);
}
