public unsafe void Append(TextAnalyzer analyzer, FontFace font, string text)
{
var layout = new TextLayout();
var format = new TextFormat {
Font = font,
Size = 32.0f
};
analyzer.AppendText(text, format);
analyzer.PerformLayout(0, 32, 1000, 1000, layout);
var memBlock = new MemoryBlock(text.Length * 6 * PosColorTexture.Layout.Stride);
var mem = (PosColorTexture*)memBlock.Data;
foreach (var thing in layout.Stuff) {
var width = thing.Width;
var height = thing.Height;
var region = new Vector4(thing.SourceX, thing.SourceY, width, height) / 4096;
var origin = new Vector2(thing.DestX, thing.DestY);
*mem++ = new PosColorTexture(origin + new Vector2(0, height), new Vector2(region.X, region.Y + region.W), unchecked((int)0xff000000));
*mem++ = new PosColorTexture(origin + new Vector2(width, height), new Vector2(region.X + region.Z, region.Y + region.W), unchecked((int)0xff000000));
*mem++ = new PosColorTexture(origin + new Vector2(width, 0), new Vector2(region.X + region.Z, region.Y), unchecked((int)0xff000000));
*mem++ = new PosColorTexture(origin, new Vector2(region.X, region.Y), unchecked((int)0xff000000));
count++;
}
vertexBuffer = new DynamicVertexBuffer(memBlock, PosColorTexture.Layout);
}
public void PerformLayout(float x, float y, float width, float height, TextLayout layout)
{
layout.SetCount(buffer.Count);
var pen = new Vector2(x, y);
for (int i = 0; i < buffer.Count; i++)
{
var entry = buffer[i];
if (entry.Break == BreakCategory.Mandatory)
{
pen.X = x;
pen.Y += 32; // TODO: line spacing
}
// data can be null for control characters,
// or for glyphs without image data
var data = entry.GlyphData;
if (data == null)
{
continue;
}
pen.X += entry.Kerning;
layout.AddGlyph(
(int)Math.Round(pen.X + data.Bearing.X),
(int)Math.Round(pen.Y - data.Bearing.Y),
data.Bounds.X,
data.Bounds.Y,
data.Bounds.Width,
data.Bounds.Height
);
pen.X += (float)Math.Round(data.AdvanceWidth);
}
}