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Location: alysbrooks-public/games/isometric-park-fna/SpriteFontPlus/src/FontStashSharp/Font.cs - annotation

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Commit Description:
Fix core builds....
Commit Description:
Fix core builds. Remove possibly unnecessary dependency that seemed to be causing issues.
References:
r661:15212b3c15eb m6-tiles-and-trees
File last commit:
r0:e33f209de7e5 default
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SpriteFontPlus/src/FontStashSharp/Font.cs
101 lines | 2.4 KiB | text/x-csharp | CSharpLexer
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alys
Early working version (including all dependencies, lol).
 r0 using System;
using System.Runtime.InteropServices;
using static StbTrueTypeSharp.StbTrueType;
namespace FontStashSharp
{
internal unsafe class Font: IDisposable
{
private readonly byte[] Data;
private GCHandle? dataPtr = null;
private float AscentBase, DescentBase, LineHeightBase;
public float Ascent { get; private set; }
public float Descent { get; private set; }
public float LineHeight { get; private set; }
public float Scale { get; private set; }
public stbtt_fontinfo _font = new stbtt_fontinfo();
public Font(byte[] data)
{
if (data == null)
{
throw new ArgumentNullException(nameof(data));
}
Data = data;
dataPtr = GCHandle.Alloc(data, GCHandleType.Pinned);
}
~Font()
{
Dispose();
}
public void Dispose()
{
if (dataPtr != null)
{
dataPtr.Value.Free();
dataPtr = null;
}
}
public void Recalculate(float size)
{
Ascent = AscentBase * size;
Descent = DescentBase * size;
LineHeight = LineHeightBase * size;
Scale = stbtt_ScaleForPixelHeight(_font, size);
}
public int GetGlyphIndex(int codepoint)
{
return stbtt_FindGlyphIndex(_font, codepoint);
}
public void BuildGlyphBitmap(int glyph, float size, float scale, ref int advance, ref int lsb, ref int x0, ref int y0, ref int x1, ref int y1)
{
int advanceTemp, lsbTemp;
stbtt_GetGlyphHMetrics(_font, glyph, &advanceTemp, &lsbTemp);
advance = advanceTemp;
lsb = lsbTemp;
int x0Temp, y0Temp, x1Temp, y1Temp;
stbtt_GetGlyphBitmapBox(_font, glyph, scale, scale, &x0Temp, &y0Temp, &x1Temp, &y1Temp);
x0 = x0Temp;
y0 = y0Temp;
x1 = x1Temp;
y1 = y1Temp;
}
public void RenderGlyphBitmap(byte[] output, int outWidth, int outHeight, int outStride, int glyph)
{
fixed (byte* outputPtr = output)
{
stbtt_MakeGlyphBitmap(_font, outputPtr, outWidth, outHeight, outStride, Scale, Scale, glyph);
}
}
public static Font FromMemory(byte[] data)
{
var font = new Font(data);
byte* dataPtr = (byte *)font.dataPtr.Value.AddrOfPinnedObject();
if (stbtt_InitFont(font._font, dataPtr, 0) == 0)
throw new Exception("stbtt_InitFont failed");
int ascent, descent, lineGap;
stbtt_GetFontVMetrics(font._font , &ascent, &descent, &lineGap);
var fh = ascent - descent;
font.AscentBase = ascent / (float)fh;
font.DescentBase = descent / (float)fh;
font.LineHeightBase = (fh + lineGap) / (float)fh;
return font;
}
}
}