public int LoadFont(StbTrueType.stbtt_fontinfo font, byte *data, int dataSize)
{
var stbError = 0;
font.userdata = this;
stbError = StbTrueType.stbtt_InitFont(font, data, 0);
return(stbError);
}
public static StbTrueType.stbtt_fontinfo LoadFontStb(byte[] bytes)
{
var font = new StbTrueType.stbtt_fontinfo();
unsafe
{
fixed(byte *fontDataPtr = &bytes[0])
{
StbTrueType.stbtt_InitFont(font, fontDataPtr, 0);
}
}
return(font);
}
public static unsafe DrawableFontAtlas RenderFontStbPacked(byte[] ttf, float fontSize, Vector2 atlasSize, int numChars, Font f, out StbTrueType.stbtt_fontinfo fontInfo)
{
var atlasObj = new DrawableFontAtlas(f, fontSize);
fontSize = atlasObj.FontSize;
fontInfo = new StbTrueType.stbtt_fontinfo();
fixed(byte *ttPtr = &ttf[0])
{
StbTrueType.stbtt_InitFont(fontInfo, ttPtr, 0);
float scaleFactor = StbTrueType.stbtt_ScaleForMappingEmToPixels(fontInfo, fontSize);
int ascent, descent, lineGap;
StbTrueType.stbtt_GetFontVMetrics(fontInfo, &ascent, &descent, &lineGap);
atlasSize *= 3; // Needs to be big as the packing sucks, and glyphs getting cut out messes with the tests.
var pixels = new byte[(int)atlasSize.X * (int)atlasSize.Y];
var pc = new StbTrueType.stbtt_pack_context();
fixed(byte *pixelsPtr = pixels)
{
StbTrueType.stbtt_PackBegin(pc, pixelsPtr, (int)atlasSize.X, (int)atlasSize.Y, (int)atlasSize.X, 1, null);
}
var cd = new StbTrueType.stbtt_packedchar[numChars];
fixed(StbTrueType.stbtt_packedchar *charPtr = cd)
{
StbTrueType.stbtt_PackFontRange(pc, ttPtr, 0, -fontSize, 0, numChars, charPtr);
}
StbTrueType.stbtt_PackEnd(pc);
for (var i = 0; i < cd.Length; ++i)
{
var atlasGlyph = DrawableGlyph.CreateForTest(cd[i].xadvance, cd[i].xoff, cd[i].x1 - cd[i].x0, cd[i].y1 - cd[i].y0);
atlasGlyph.GlyphUV = new Rectangle(cd[i].x0, cd[i].y0, atlasGlyph.Width, atlasGlyph.Height);
atlasObj.Glyphs[(char)i] = atlasGlyph;
}
}
return(atlasObj);
}
/// <summary>
/// Loads a Font from the byte array. The Font will use this buffer until it is disposed.
/// </summary>
public unsafe Font(byte[] buffer)
{
fontBuffer = buffer;
fontHandle = GCHandle.Alloc(fontBuffer, GCHandleType.Pinned);
fontInfo = new StbTrueType.stbtt_fontinfo();
StbTrueType.stbtt_InitFont(fontInfo, (byte *)(fontHandle.AddrOfPinnedObject().ToPointer()), 0);
FamilyName = GetName(fontInfo, 1);
StyleName = GetName(fontInfo, 2);
// properties
int ascent, descent, linegap;
StbTrueType.stbtt_GetFontVMetrics(fontInfo, &ascent, &descent, &linegap);
Ascent = ascent;
Descent = descent;
LineGap = linegap;
Height = Ascent - Descent;
LineHeight = Height + LineGap;
public static TtfFontBakerResult Bake(byte[] ttf, float fontPixelHeight,
int bitmapWidth, int bitmapHeight,
IEnumerable <CharacterRange> characterRanges)
{
if (ttf == null || ttf.Length == 0)
{
throw new ArgumentNullException(nameof(ttf));
}
if (fontPixelHeight <= 0)
{
throw new ArgumentOutOfRangeException(nameof(fontPixelHeight));
}
if (bitmapWidth <= 0)
{
throw new ArgumentOutOfRangeException(nameof(bitmapWidth));
}
if (bitmapHeight <= 0)
{
throw new ArgumentOutOfRangeException(nameof(bitmapHeight));
}
if (characterRanges == null)
{
throw new ArgumentNullException(nameof(characterRanges));
}
if (!characterRanges.Any())
{
throw new ArgumentException("characterRanges must have a least one value.");
}
byte[] pixels;
var glyphs = new Dictionary <int, GlyphInfo>();
fixed(byte *ttfPtr = ttf)
{
StbTrueType.stbtt_fontinfo fontInfo = new StbTrueType.stbtt_fontinfo();
if (StbTrueType.stbtt_InitFont(fontInfo, ttfPtr, 0) == 0)
{
throw new Exception("Failed to init font.");
}
float scaleFactor = StbTrueType.stbtt_ScaleForPixelHeight(fontInfo, fontPixelHeight);
int ascent, descent, lineGap;
StbTrueType.stbtt_GetFontVMetrics(fontInfo, &ascent, &descent, &lineGap);
pixels = new byte[bitmapWidth * bitmapHeight];
StbTrueType.stbtt_pack_context pc = new StbTrueType.stbtt_pack_context();
fixed(byte *pixelsPtr = pixels)
{
StbTrueType.stbtt_PackBegin(pc, pixelsPtr, bitmapWidth,
bitmapHeight, bitmapWidth, 1, null);
}
foreach (var range in characterRanges)
{
if (range.Start > range.End)
{
continue;
}
var cd = new StbTrueType.stbtt_packedchar[range.End - range.Start + 1];
fixed(StbTrueType.stbtt_packedchar *chardataPtr = cd)
{
StbTrueType.stbtt_PackFontRange(pc, ttfPtr, 0, fontPixelHeight,
range.Start,
range.End - range.Start + 1,
chardataPtr);
}
for (var i = 0; i < cd.Length; ++i)
{
var yOff = cd[i].yoff;
yOff += ascent * scaleFactor;
var glyphInfo = new GlyphInfo
{
X = cd[i].x0,
Y = cd[i].y0,
Width = cd[i].x1 - cd[i].x0,
Height = cd[i].y1 - cd[i].y0,
XOffset = (int)cd[i].xoff,
YOffset = (int)Math.Round(yOff),
XAdvance = (int)Math.Round(cd[i].xadvance)
};
glyphs[(char)(i + range.Start)] = glyphInfo;
}
}
}
return(new TtfFontBakerResult(glyphs, fontPixelHeight, pixels, bitmapWidth, bitmapHeight));
}
public void Add(byte[] ttf, float fontPixelHeight,
List <CharRange> charRanges)
{
if (ttf == null || ttf.Length == 0)
{
throw new ArgumentNullException(nameof(ttf));
}
if (fontPixelHeight <= 0)
{
throw new ArgumentOutOfRangeException(nameof(fontPixelHeight));
}
if (charRanges == null)
{
throw new ArgumentNullException(nameof(charRanges));
}
if (!charRanges.Any())
throw new ArgumentException("charRanges must have a least one value.");
fixed(byte *ttfPtr = ttf)
{
var fontInfo = new StbTrueType.stbtt_fontinfo();
if (StbTrueType.stbtt_InitFont(fontInfo, ttfPtr, 0) == 0)
{
throw new Exception("Failed to init font.");
}
var scaleFactor = StbTrueType.stbtt_ScaleForPixelHeight(fontInfo, fontPixelHeight);
int ascent, descent, lineGap;
StbTrueType.stbtt_GetFontVMetrics(fontInfo, &ascent, &descent, &lineGap);
foreach (var range in charRanges)
{
if (range.Start > range.End)
{
continue;
}
var cd = new StbTrueType.stbtt_packedchar[range.End - range.Start + 1];
fixed(StbTrueType.stbtt_packedchar *chardataPtr = cd)
{
StbTrueType.stbtt_PackFontRange(_context, ttfPtr, 0, fontPixelHeight,
range.Start,
range.End - range.Start + 1,
chardataPtr);
}
for (var i = 0; i < cd.Length; ++i)
{
var yOff = cd[i].yoff;
yOff += ascent * scaleFactor;
var glyphInfo = new GlyphInfo
{
X = cd[i].x0,
Y = cd[i].y0,
Width = cd[i].x1 - cd[i].x0,
Height = cd[i].y1 - cd[i].y0,
XOffset = (int)cd[i].xoff,
YOffset = (int)Math.Round(yOff),
XAdvance = (int)Math.Round(cd[i].xadvance)
};
_glyphs[i + range.Start] = glyphInfo;
}
}
}
}
