private void SetupSpaceGlyphs(MSDFFontData fontData)
{
var space = fontData.GetGlyphById(SPACE_ID);
if (null == space)
{
space = fontData.GetMGlyph();
}
if (null == space)
{
space = fontData.GetGlyphByIndex(0);
}
var tabWidth = _tabSize * space.xadvance;
_fallbackSpaceGlyph = space;
_fallbackTabGlyph = new Glyph()
{
x = 0,
y = 0,
xadvance = tabWidth,
id = TAB_ID,
xoffset = 0,
yoffset = 0,
width = 0,
height = 0,
page = space.page,
channel = space.channel,
character = space.character,
index = space.index,
};
}
private static float GetCapHeight(MSDFFontData fontData)
{
foreach (var str in CAP_HEIGHTS)
{
var id = MSDFFontData.GetCharCode(str);
if (fontData.HasChar(id))
{
return(fontData.GetGlyphById(id).height);
}
}
return(0f);
}
private static Metrics ComputeMetrics(MSDFFontData fontData, string text, int start, int end, float width, float?letterSpacing = null)
{
var spacing = null != letterSpacing ? letterSpacing : 0f;
var curPen = 0f;
var curWidth = 0f;
var count = 0;
Glyph glyph = null;
Glyph lastGlyph = null;
if (null == fontData || 0 == fontData.CharCount())
{
return(new Metrics()
{
start = start,
end = start,
width = 0f
});
}
end = Mathf.Min(text.Length, end);
for (var i = start; i < end; ++i)
{
var id = MSDFFontData.GetCharCode(text[i]);
glyph = fontData.GetGlyphById(id);
if (null != glyph)
{
var xoff = glyph.xoffset;
var kern = null == lastGlyph ? 0f : fontData.GetKerningAmount(lastGlyph.id, glyph.id);
curPen += kern;
var nextPen = curPen + glyph.xadvance;
var nextWidth = curPen + glyph.width;
if (nextWidth >= width || nextPen >= width)
{
break;
}
curPen = nextPen;
curWidth = nextWidth;
lastGlyph = glyph;
}
++count;
}
if (null != lastGlyph)
{
curWidth += lastGlyph.xoffset;
}
return(new Metrics()
{
start = start,
end = start + count,
width = curWidth
});
}
public static List <ProcessedGlyph> GetVisibleGlyphs(string text, MSDFFontData fontData, float tabSize = 4f, int width = 0, float lineHeight = 0f, float letterSpacing = 0f, Align alignType = Align.LEFT)
{
// setup space and tab
var space = fontData.GetGlyphById(SPACE_ID);
if (null == space)
{
space = fontData.GetMGlyph();
}
if (null == space)
{
space = fontData.GetGlyphByIndex(0);
}
var fallbackSpaceGlyph = space;
var fallbackTabGlyph = new Glyph()
{
x = 0,
y = 0,
xadvance = tabSize * space.xadvance,
id = TextLayout.TAB_ID,
xoffset = 0,
yoffset = 0,
width = 0,
height = 0,
page = space.page,
channel = space.channel,
character = space.character,
index = space.index,
};
// calculate layouts
var glyphs = new List <ProcessedGlyph>();
var lines = WordWrapper.GetLines(text, fontData);
var minWidth = width;
glyphs.Clear();
var maxLineWidth = lines.Max(metrics => metrics.width);
var x = 0f;
var y = 0f;
var lh = 0f == lineHeight ? fontData.common.lineHeight : lineHeight;
var descender = lh - fontData.common.baseLine;
var height = lh * lines.Count() - descender;
y -= height;
int lineIndex = 0;
foreach (var line in lines)
{
var start = line.start;
var end = line.end;
var lineWidth = line.width;
Glyph lastGlyph = null;
for (var i = start; i < end; ++i)
{
var id = MSDFFontData.GetCharCode(text[i]);
Glyph glyph;
if (id == TAB_ID)
{
glyph = fallbackTabGlyph;
}
else if (id == SPACE_ID)
{
glyph = fallbackSpaceGlyph;
}
else
{
glyph = fontData.GetGlyphById(id);
}
if (null != glyph)
{
if (null != lastGlyph)
{
x += fontData.GetKerningAmount(lastGlyph.id, glyph.id);
}
var tx = x;
if (Align.CENTER == alignType)
{
tx += (maxLineWidth - lineWidth) * 0.5f;
}
else if (Align.RIGHT == alignType)
{
tx += (maxLineWidth - lineWidth);
}
glyphs.Add(new ProcessedGlyph()
{
position = new Vector2(tx, y),
glyph = glyph,
index = i,
line = lineIndex
});
x += glyph.xadvance + letterSpacing;
lastGlyph = glyph;
}
}
y += lineHeight;
x = 0;
++lineIndex;
}
return(glyphs.Where(g => g.glyph.width * g.glyph.height > 0).ToList());
}
private void Update(string text, MSDFFontData fontData, int tabSize = 4, int width = 0, float lineHeight = 0f, float letterSpacing = 0f, Align alignType = Align.LEFT)
{
SetupSpaceGlyphs(fontData);
var lines = WordWrapper.GetLines(text, fontData);
var minWidth = width;
glyphs.Clear();
var maxLineWidth = lines.Max(metrics => metrics.width);
var x = 0f;
var y = 0f;
var lh = 0f == lineHeight ? fontData.common.lineHeight : lineHeight;
var baseline = fontData.common.baseLine;
var descender = lh - baseline;
var spacing = letterSpacing;
var height = lh * lines.Count() - descender;
var align = alignType;
y -= height;
_width = maxLineWidth;
_height = height;
_descender = lineHeight - baseline;
_baseline = baseline;
_xHeight = GetXHeight(fontData);
_capHeight = GetCapHeight(fontData);
_lineHeight = lineHeight;
_ascender = lineHeight - descender - _xHeight;
int lineIndex = 0;
foreach (var line in lines)
{
var start = line.start;
var end = line.end;
var lineWidth = line.width;
Glyph lastGlyph = null;
for (var i = start; i < end; ++i)
{
var id = MSDFFontData.GetCharCode(text[i]);
var glyph = fontData.GetGlyphById(id);
if (null != glyph)
{
if (null != lastGlyph)
{
x += fontData.GetKerningAmount(lastGlyph.id, glyph.id);
}
var tx = x;
if (Align.CENTER == align)
{
tx += (maxLineWidth - lineWidth) * 0.5f;
}
else if (Align.RIGHT == align)
{
tx += (maxLineWidth - lineWidth);
}
glyphs.Add(new ProcessedGlyph()
{
position = new Vector2(tx, y),
glyph = glyph,
index = i,
line = lineIndex
});
x += glyph.xadvance + letterSpacing;
lastGlyph = glyph;
}
}
y += lineHeight;
x = 0;
++lineIndex;
}
_linesTotal = lines.Count;
}