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@ -12,8 +12,6 @@ using Avalonia.OpenGL.Imaging; |
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using Avalonia.Platform; |
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using Avalonia.Media.Imaging; |
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using SkiaSharp; |
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using System.Runtime.InteropServices; |
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using System.Drawing; |
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namespace Avalonia.Skia |
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{ |
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@ -79,7 +77,7 @@ namespace Avalonia.Skia |
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var skFont = new SKFont(glyphTypeface.Typeface, fontRenderingEmSize) |
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{ |
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Size = fontRenderingEmSize, |
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Edging = SKFontEdging.Antialias, |
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Edging = SKFontEdging.Alias, |
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Hinting = SKFontHinting.None, |
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LinearMetrics = true |
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}; |
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@ -244,85 +242,91 @@ namespace Avalonia.Skia |
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"Current GPU acceleration backend does not support OpenGL integration"); |
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} |
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public IGlyphRunBuffer AllocateGlyphRun(IGlyphTypeface glyphTypeface, float fontRenderingEmSize, int length) |
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=> new SKGlyphRunBuffer(glyphTypeface, fontRenderingEmSize, length); |
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public IGlyphRunImpl CreateGlyphRun(IGlyphTypeface glyphTypeface, double fontRenderingEmSize, IReadOnlyList<ushort> glyphIndices, |
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IReadOnlyList<double> glyphAdvances, IReadOnlyList<Vector> glyphOffsets) |
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{ |
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if (glyphTypeface == null) |
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{ |
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throw new ArgumentNullException(nameof(glyphTypeface)); |
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} |
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public IHorizontalGlyphRunBuffer AllocateHorizontalGlyphRun(IGlyphTypeface glyphTypeface, float fontRenderingEmSize, int length) |
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=> new SKHorizontalGlyphRunBuffer(glyphTypeface, fontRenderingEmSize, length); |
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if (glyphIndices == null) |
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{ |
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throw new ArgumentNullException(nameof(glyphIndices)); |
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} |
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public IPositionedGlyphRunBuffer AllocatePositionedGlyphRun(IGlyphTypeface glyphTypeface, float fontRenderingEmSize, int length) |
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=> new SKPositionedGlyphRunBuffer(glyphTypeface, fontRenderingEmSize, length); |
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var glyphTypefaceImpl = glyphTypeface as GlyphTypefaceImpl; |
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private abstract class SKGlyphRunBufferBase : IGlyphRunBuffer |
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{ |
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protected readonly SKTextBlobBuilder _builder; |
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protected readonly SKFont _font; |
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var font = new SKFont |
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{ |
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LinearMetrics = true, |
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Subpixel = true, |
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Edging = SKFontEdging.SubpixelAntialias, |
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Hinting = SKFontHinting.Full, |
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Size = (float)fontRenderingEmSize, |
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Typeface = glyphTypefaceImpl.Typeface, |
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Embolden = (glyphTypefaceImpl.FontSimulations & FontSimulations.Bold) != 0, |
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SkewX = (glyphTypefaceImpl.FontSimulations & FontSimulations.Oblique) != 0 ? -0.2f : 0 |
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}; |
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var builder = new SKTextBlobBuilder(); |
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public SKGlyphRunBufferBase(IGlyphTypeface glyphTypeface, float fontRenderingEmSize, int length) |
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var count = glyphIndices.Count; |
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if(glyphOffsets != null && glyphAdvances != null) |
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{ |
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_builder = new SKTextBlobBuilder(); |
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var runBuffer = builder.AllocatePositionedRun(font, count); |
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var glyphTypefaceImpl = (GlyphTypefaceImpl)glyphTypeface; |
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var glyphSpan = runBuffer.GetGlyphSpan(); |
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var positionSpan = runBuffer.GetPositionSpan(); |
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_font = new SKFont |
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{ |
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Subpixel = true, |
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Edging = SKFontEdging.SubpixelAntialias, |
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Hinting = SKFontHinting.Full, |
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LinearMetrics = true, |
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Size = fontRenderingEmSize, |
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Typeface = glyphTypefaceImpl.Typeface, |
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Embolden = glyphTypefaceImpl.IsFakeBold, |
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SkewX = glyphTypefaceImpl.IsFakeItalic ? -0.2f : 0 |
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}; |
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} |
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var currentX = 0.0; |
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public abstract Span<ushort> GlyphIndices { get; } |
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for (int i = 0; i < glyphOffsets.Count; i++) |
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{ |
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var offset = glyphOffsets[i]; |
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public IGlyphRunImpl Build() |
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{ |
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return new GlyphRunImpl(_builder.Build()); |
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} |
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} |
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glyphSpan[i] = glyphIndices[i]; |
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private sealed class SKGlyphRunBuffer : SKGlyphRunBufferBase |
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{ |
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private readonly SKRunBuffer _buffer; |
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positionSpan[i] = new SKPoint((float)(currentX + offset.X), (float)offset.Y); |
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public SKGlyphRunBuffer(IGlyphTypeface glyphTypeface, float fontRenderingEmSize, int length) : base(glyphTypeface, fontRenderingEmSize, length) |
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{ |
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_buffer = _builder.AllocateRun(_font, length, 0, 0); |
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currentX += glyphAdvances[i]; |
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} |
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} |
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else |
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{ |
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if(glyphAdvances != null) |
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{ |
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var runBuffer = builder.AllocateHorizontalRun(font, count, 0); |
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public override Span<ushort> GlyphIndices => _buffer.GetGlyphSpan(); |
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} |
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var glyphSpan = runBuffer.GetGlyphSpan(); |
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var positionSpan = runBuffer.GetPositionSpan(); |
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private sealed class SKHorizontalGlyphRunBuffer : SKGlyphRunBufferBase, IHorizontalGlyphRunBuffer |
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{ |
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private readonly SKHorizontalRunBuffer _buffer; |
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var currentX = 0.0; |
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public SKHorizontalGlyphRunBuffer(IGlyphTypeface glyphTypeface, float fontRenderingEmSize, int length) : base(glyphTypeface, fontRenderingEmSize, length) |
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{ |
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_buffer = _builder.AllocateHorizontalRun(_font, length, 0); |
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} |
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for (int i = 0; i < glyphOffsets.Count; i++) |
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{ |
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glyphSpan[i] = glyphIndices[i]; |
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public override Span<ushort> GlyphIndices => _buffer.GetGlyphSpan(); |
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positionSpan[i] = (float)currentX; |
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public Span<float> GlyphPositions => _buffer.GetPositionSpan(); |
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} |
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currentX += glyphAdvances[i]; |
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} |
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} |
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else |
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{ |
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var runBuffer = builder.AllocateRun(font, count, 0, 0); |
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private sealed class SKPositionedGlyphRunBuffer : SKGlyphRunBufferBase, IPositionedGlyphRunBuffer |
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{ |
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private readonly SKPositionedRunBuffer _buffer; |
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var glyphSpan = runBuffer.GetGlyphSpan(); |
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public SKPositionedGlyphRunBuffer(IGlyphTypeface glyphTypeface, float fontRenderingEmSize, int length) : base(glyphTypeface, fontRenderingEmSize, length) |
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{ |
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_buffer = _builder.AllocatePositionedRun(_font, length); |
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for (int i = 0; i < glyphOffsets.Count; i++) |
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{ |
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glyphSpan[i] = glyphIndices[i]; |
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} |
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} |
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} |
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public override Span<ushort> GlyphIndices => _buffer.GetGlyphSpan(); |
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public Span<PointF> GlyphPositions => MemoryMarshal.Cast<SKPoint, PointF>(_buffer.GetPositionSpan()); |
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return new GlyphRunImpl(builder.Build()); |
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} |
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} |
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} |
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Benedikt Stebner
3 years ago