84 lines
1.9 KiB
C#
84 lines
1.9 KiB
C#
#region Copyright & License Information
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/*
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* Copyright 2007-2019 The OpenRA Developers (see AUTHORS)
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* This file is part of OpenRA, which is free software. It is made
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* available to you under the terms of the GNU General Public License
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* as published by the Free Software Foundation, either version 3 of
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* the License, or (at your option) any later version. For more
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* information, see COPYING.
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*/
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#endregion
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using OpenRA.Primitives;
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using SharpFont;
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namespace OpenRA.Platforms.Default
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{
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public sealed class FreeTypeFont : IFont
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{
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static readonly Library Library = new Library();
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readonly Face face;
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public FreeTypeFont(byte[] data)
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{
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face = new Face(Library, data, 0);
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}
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public FontGlyph CreateGlyph(char c, int size, float deviceScale)
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{
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try
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{
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var scaledSize = (uint) (size * deviceScale);
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face.SetPixelSizes(scaledSize, scaledSize);
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face.LoadChar(c, LoadFlags.Default, LoadTarget.Normal);
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face.Glyph.RenderGlyph(RenderMode.Normal);
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var glyphSize = new Size((int)face.Glyph.Metrics.Width, (int)face.Glyph.Metrics.Height);
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var g = new FontGlyph
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{
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Advance = (float)face.Glyph.Metrics.HorizontalAdvance,
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Offset = new int2(face.Glyph.BitmapLeft, -face.Glyph.BitmapTop),
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Size = glyphSize,
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Data = new byte[glyphSize.Width * glyphSize.Height]
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};
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// A new bitmap is generated each time this property is accessed, so we do need to dispose it.
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using (var bitmap = face.Glyph.Bitmap)
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{
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unsafe
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{
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var p = (byte*)bitmap.Buffer;
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var k = 0;
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for (var j = 0; j < glyphSize.Height; j++)
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{
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for (var i = 0; i < glyphSize.Width; i++)
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g.Data[k++] = p[i];
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p += bitmap.Pitch;
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}
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}
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}
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return g;
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}
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catch (FreeTypeException)
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{
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return new FontGlyph
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{
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Offset = int2.Zero,
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Size = new Size(0, 0),
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Advance = 0,
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Data = null
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};
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}
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}
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public void Dispose()
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{
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face.Dispose();
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}
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}
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}
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