public Vector2 MeasureString(string text)
{
var pairs = Font.StringToPair;
var activeFont = this;
if (string.IsNullOrEmpty(text))
{
return(new Vector2(0, Height / VectorScale));
}
var size = new Vector2(0, Height / VectorScale);
var subScale = 1f;
MSDFGlyph next = null;
if (text.Length > 0)
{
var c = text[0];
next = GetGlyph(c);
}
for (int i = 0; i < text.Length; i++)
{
var glyph = next;
if (next == null)
{
if (i + 1 >= text.Length)
{
break;
}
var c = text[i + 1];
next = GetGlyph(c);
continue;
}
if (activeFont != next.Font)
{
activeFont = next.Font;
pairs = glyph.Font.Info.pairs;
subScale = (activeFont != this) ? activeFont.VectorScale / VectorScale : 1f;
}
size.X += glyph.Glyph.Metrics.Advance * subScale;
if (i < text.Length - 1)
{
var c = text[i + 1];
next = GetGlyph(c);
if (next != null)
{
KerningPair pair;
if (pairs.TryGetValue(new string(new char[] { glyph.Glyph.Character, next.Glyph.Character }), out pair))
{
size.X += pair.Advance * subScale;
}
}
}
}
return(size);
}
public void Draw(GraphicsDevice gd, string text, Vector2 pos, Color color, Vector2 scale, Matrix?mat)
{
if (string.IsNullOrEmpty(text))
{
return;
}
var point = new Vector2(0, 0);
var atlas = GetAtlas(gd);
var wv = Matrix.CreateScale(scale.X, scale.Y, 1)
* Matrix.CreateTranslation(pos.X, pos.Y, 0);
if (mat != null)
{
wv = wv * mat.Value;
wv.Decompose(out var scale2, out var quat, out var trans);
scale.X = scale2.X;
scale.Y = scale2.Y;
}
var wvp = wv * Matrix.CreateOrthographicOffCenter(new Rectangle(0, 0, gd.Viewport.Width, gd.Viewport.Height), -0.1f, 1f);
var effect = MSDFEffect;
var groups = new Dictionary <MSDFFont, MSDFRenderGroup>();
var activeFont = this;
var itemW = Info.itemW;
var itemH = Info.itemH;
var textureWidth = Info.textureWidth;
var textureHeight = Info.textureHeight;
var cutUX = Info.cutUX;
var cutUY = Info.cutUY;
var uW = Info.uW;
var uH = Info.uH;
var atlasWidth = Info.atlasWidth;
var pairs = Info.pairs;
var data = new MSDFRenderGroup(this);
groups[this] = data;
var verts = data.Vertices;
var inds = data.Indices;
effect.Parameters["WorldViewProjection"].SetValue(wvp);
effect.Parameters["Color"].SetValue(color.ToVector4());
effect.CurrentTechnique = effect.Techniques[0];
var subScale = 1f;
MSDFGlyph next = null;
if (text.Length > 0)
{
var c = text[0];
next = GetGlyph(c);
}
for (int i = 0; i < text.Length; i++)
{
var glyph = next;
if (glyph == null)
{
if (i + 1 >= text.Length)
{
break;
}
var c = text[i + 1];
next = GetGlyph(c);
continue;
}
if (glyph.Font != activeFont)
{
activeFont = glyph.Font;
subScale = (activeFont != this) ? activeFont.VectorScale / VectorScale : 1f;
var ainfo = activeFont.Info;
itemW = ainfo.itemW;
itemH = ainfo.itemH;
textureWidth = ainfo.textureWidth;
textureHeight = ainfo.textureHeight;
cutUX = ainfo.cutUX;
cutUY = ainfo.cutUY;
uW = ainfo.uW;
uH = ainfo.uH;
atlasWidth = ainfo.atlasWidth;
pairs = ainfo.pairs;
MSDFRenderGroup mdata = null;
if (!groups.TryGetValue(activeFont, out mdata))
{
mdata = new MSDFRenderGroup(activeFont);
groups[activeFont] = mdata;
}
verts = mdata.Vertices;
inds = mdata.Indices;
}
var fglyph = glyph.Glyph;
var mscale = fglyph.Metrics.Scale;
var left = point.X - (fglyph.Metrics.Translation.X - 1 / mscale) * subScale;
var bottom = point.Y + (fglyph.Metrics.Translation.Y + activeFont.YOff / activeFont.VectorScale - 1 / mscale) * subScale;
mscale /= subScale;
var glyphHeight = (textureHeight - 2) / mscale;
var glyphWidth = (textureWidth - 2) / mscale;
var right = left + glyphWidth;
var top = bottom - glyphHeight;
var tx = (fglyph.AtlasIndex % atlasWidth) * itemW + cutUX;
var ty = (fglyph.AtlasIndex / atlasWidth) * itemH + cutUY;
var derivative = (new Vector2(uW / (right - left), uH / (bottom - top)) / scale) / 2;
if (!char.IsWhiteSpace(fglyph.Character))
{
RenderQuad(inds, verts, new Vector2(left, bottom), new Vector2(right, top), new Vector2(tx, ty + uH), new Vector2(tx + uW, ty), derivative);
}
point.X += fglyph.Metrics.Advance * subScale;
if (i < text.Length - 1)
{
var c = text[i + 1];
next = GetGlyph(c);
if (next != null)
{
KerningPair pair;
if (pairs.TryGetValue(new string(new char[] { fglyph.Character, next.Glyph.Character }), out pair))
{
point.X += pair.Advance * subScale;
}
}
}
}
foreach (var group in groups.Values)
{
effect.Parameters["PxRange"].SetValue(group.Font.Font.PxRange);
var groupAtlas = group.Font.GetAtlas(gd);
effect.Parameters["TextureSize"].SetValue(new Vector2(groupAtlas.Width, groupAtlas.Height));
effect.Parameters["GlyphTexture"].SetValue(groupAtlas);
effect.CurrentTechnique.Passes[0].Apply();
if (group.Vertices.Count == 0)
{
continue;
}
gd.DrawUserIndexedPrimitives(PrimitiveType.TriangleList,
group.Vertices.ToArray(), 0, group.Vertices.Count,
group.Indices.ToArray(), 0, group.Indices.Count / 3);
}
}