83 lines
2.7 KiB
C#
83 lines
2.7 KiB
C#
using System;
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using System.Buffers;
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using System.IO;
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using ReFuel.FreeType;
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using Dashboard.Media.Color;
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using Dashboard.Media.Font;
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namespace Dashboard.Media.Defaults
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{
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public class QFontFreeType : QFont
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{
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private MemoryStream ms;
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private FTFace face;
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public override FontFace Face => throw new NotImplementedException();
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public QFontFreeType(Stream stream)
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{
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ms = new MemoryStream();
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stream.CopyTo(ms);
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FTError e = FT.NewMemoryFace(Ft, ms.GetBuffer(), ms.Length, 0, out face);
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if (e != FTError.None)
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{
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throw new Exception("Could not load font face from stream.");
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}
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}
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public override bool HasRune(int rune)
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{
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return FT.GetCharIndex(face, (ulong)rune) != 0;
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}
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protected override QImage Render(out QGlyphMetrics metrics, int codepoint, float size, in FontRasterizerOptions options)
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{
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FT.SetCharSize(face, 0, (long)Math.Round(64*size), 0, (uint)Math.Round(options.Resolution));
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uint index = FT.GetCharIndex(face, (ulong)codepoint);
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FT.LoadGlyph(face, index, FTLoadFlags.Default);
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ref readonly FTGlyphMetrics ftmetrics = ref face.Glyph.Metrics;
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metrics = new QGlyphMetrics(codepoint,
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new QVec2(ftmetrics.Width/64f, ftmetrics.Height/64f),
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new QVec2(ftmetrics.HorizontalBearingX/64f, ftmetrics.HorizontalBearingY/64f),
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new QVec2(ftmetrics.VerticalBearingX/64f, ftmetrics.VerticalBearingY/64f),
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new QVec2(ftmetrics.HorizontalAdvance/64f, ftmetrics.VerticalAdvance/64f)
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);
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FT.RenderGlyph(face.Glyph, options.Sdf ? FTRenderMode.Sdf : FTRenderMode.Normal);
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ref readonly FTBitmap bitmap = ref face.Glyph.Bitmap;
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if (bitmap.Width == 0 || bitmap.Pitch == 0 || bitmap.Buffer == IntPtr.Zero)
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{
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return null;
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}
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QImageBuffer image = new QImageBuffer(QImageFormat.AlphaU8, (int)bitmap.Width, (int)bitmap.Rows);
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image.LockBits2d(out QImageLock lk, QImageLockOptions.Default);
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unsafe
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{
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Buffer.MemoryCopy((void*)bitmap.Buffer, (void*)lk.ImagePtr, lk.Width * lk.Height, bitmap.Width * bitmap.Rows);
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}
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image.UnlockBits();
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return image;
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}
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protected override void Dispose(bool disposing)
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{
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base.Dispose(disposing);
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if (disposing)
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{
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ms.Dispose();
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}
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FT.DoneFace(face);
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}
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private static FTLibrary Ft => FTProvider.Ft;
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}
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} |