void Upload()
{
TextSettings settings = new TextSettings()
{
Size = 1,
Weight = weight,
Border = border,
Smooth = smooth,
Color = Color,
BorderColor = borderColor,
LineHeight = lineheight,
GlyphSpacing = glyphSpacing,
HorizontalAlignment = horizontalAlignment,
VerticalAlignment = verticalAlignment,
MaxWidth = 0
};
vertices = Font.TextToVertices(text, settings);
List<int> tmp = new List<int>();
Width = 0;
Height = 0;
float minw = 0f, minh = 0f;
for (int i = 0; i < vertices.Length / 4; i++)
{
// 1st triangle
tmp.Add(i * 4 + 0);
tmp.Add(i * 4 + 1);
tmp.Add(i * 4 + 2);
// 2nd triangle
tmp.Add(i * 4 + 2);
tmp.Add(i * 4 + 1);
tmp.Add(i * 4 + 3);
for (int o = 0; o < 4; o++ )
{
if (vertices[i * 4 + o].Vertex.X > Width)
{
Width = vertices[i * 4 + o].Vertex.X;
}
if (vertices[i * 4 + o].Vertex.Y > Height)
{
Height = vertices[i * 4 + o].Vertex.Y;
}
if (vertices[i * 4 + o].Vertex.X < minw)
{
minw = vertices[i * 4 + o].Vertex.X;
}
if (vertices[i * 4 + o].Vertex.Y < minh)
{
minh = vertices[i * 4 + o].Vertex.Y;
}
}
}
if(horizontalAlignment == Fonts.HorizontalAlignment.Centered)
{
Width *= 2;
}
else if(horizontalAlignment == Fonts.HorizontalAlignment.Right)
{
Width = -minw;
}
if(verticalAlignment == Fonts.VerticalAlignment.Middle)
{
Height *= -2;
}
else if(verticalAlignment == Fonts.VerticalAlignment.Bottom)
{
Height = minh;
}
Width *= fontsize;
Height *= fontsize;
indices = tmp.ToArray();
GL.BindBuffer(BufferTarget.ArrayBuffer, vbo);
GL.BufferData(BufferTarget.ArrayBuffer, new IntPtr(vertices.Length * GPUGlyph.SizeInBytes), vertices, BufferUsageHint.DynamicDraw);
GL.BindBuffer(BufferTarget.ArrayBuffer, 0);
GL.BindBuffer(BufferTarget.ElementArrayBuffer, ebo);
GL.BufferData(BufferTarget.ElementArrayBuffer, new IntPtr(indices.Length * sizeof(int)), indices, BufferUsageHint.DynamicDraw);
GL.BindBuffer(BufferTarget.ElementArrayBuffer, 0);
}
public GPUGlyph[] TextToVertices(string text, TextSettings settings)
{
if(Glyphs == null)
return null;
var vertices = new List<GPUGlyph>();
Vector2 vOffset = Vector2.Zero;
//vOffset.Y += settings.LineHeight / 2;
int index = 0;
List<int> linestarts = new List<int>();
linestarts.Add(0);
foreach(char c in text)
{
Glyph glyph;
if(Glyphs.TryGetValue(c, out glyph))
{
var gpuglyph = glyph.GetGPUGlyph(vOffset, settings.Size, settings.Weight, settings.Border, settings.Smooth, settings.Color, settings.BorderColor);
vertices.AddRange(gpuglyph);
vOffset.X += glyph.XAdvance * settings.GlyphSpacing;
index += gpuglyph.Length;
if(settings.MaxWidth > 0 && settings.MaxWidth <= vOffset.X)
{
vOffset.Y += settings.LineHeight;
vOffset.X = 0;
linestarts.Add(index);
}
}
else
{
if(c == '\n')
{
vOffset.Y += settings.LineHeight;
vOffset.X = 0;
linestarts.Add(index);
}
else
{
vOffset.X += settings.Size * 0.5f;
}
}
if (settings.MaxHeight > 0 && settings.MaxHeight <= vOffset.Y)
break;
}
if(settings.HorizontalAlignment != HorizontalAlignment.Left || settings.VerticalAlignment != VerticalAlignment.Top)
{
int lines = linestarts.Count;
float voffset = 0;
if (settings.VerticalAlignment == VerticalAlignment.Middle)
{
var bottompos = vertices[vertices.Count - 1].Vertex.Y;
voffset = -bottompos / 2.0f;
}
else if (settings.VerticalAlignment == VerticalAlignment.Bottom)
{
var bottompos = vertices[vertices.Count - 1].Vertex.Y;
voffset = -bottompos;
}
for(int i = 0; i < lines; i++)
{
var linestart = linestarts[i];
int lineend = vertices.Count;
if(i+1 != lines)
{
lineend = linestarts[i + 1];
}
Vector2 offset = new Vector2(0, voffset);
if (settings.HorizontalAlignment == HorizontalAlignment.Centered)
{
var rightpos = vertices[lineend - 1].Vertex.X;
offset += new Vector2(-rightpos / 2, 0);
}
else if (settings.HorizontalAlignment == HorizontalAlignment.Right)
{
var rightpos = vertices[lineend - 1].Vertex.X;
offset += new Vector2(-rightpos, 0);
}
for (int vIndex = linestart; vIndex < lineend; vIndex++)
{
var tmp = vertices[vIndex];
tmp.Vertex += offset;
vertices[vIndex] = tmp;
}
}
}
return vertices.ToArray();
}
