private unsafe bool CacheGlyph(uint c, out GlyphEntry glyphEntry)
{
foreach (var face in faces)
{
if (face.TryCharIndex(c, out var glyph))
{
if (face.HasColor())
{
face.LoadGlyph(glyph, LoadFlags.RENDER);//NOT IMPLEMENTED face.LoadGlyph(glyph, LoadFlags.COLOR);
}
else
{
face.LoadGlyph(glyph, LoadFlags.RENDER);
}
var glyphSlot = face.GetGlyphSlot();
var w = glyphSlot.bitmap.width;
var h = glyphSlot.bitmap.rows;
var buffer = (byte *)glyphSlot.bitmap.buffer;
if (glyphSlot.bitmap.pitch < 0)
{
continue;
}
var colorData = new Color[w * h];
var result = glyphSlot.bitmap.pixel_mode switch
{
FTPixelMode.FT_PIXEL_MODE_GRAY => FTPixelModeGrayPutColorData(colorData, w, h, buffer),
FTPixelMode.FT_PIXEL_MODE_BGRA => FTPixelModeColorPutColorData(colorData, w, h, buffer),
_ => throw new ArgumentException("Unsupported pixel mode")
};
if (result)
{
if (spriteMaps.Count > 0 && spriteMaps[spriteMaps.Count - 1].Place(colorData, (int)w, (int)h, out var idx))
{
glyphEntry = new GlyphEntry
{
sprite = new Sprite
{
mapId = spriteMaps.Count - 1,
spriteIdx = idx
},
height = (int)h,
width = (int)w,
leftOffset = glyphSlot.bitmap_left,
topOffset = glyphSlot.bitmap_top
};
spriteReferences.TryAdd(c, glyphEntry);
}
else
{
var newMap = new SpriteMap(graphicsDevice);
if (newMap.Place(colorData, (int)w, (int)h, out idx))
{
glyphEntry = new GlyphEntry
{
sprite = new Sprite
{
mapId = spriteMaps.Count,
spriteIdx = idx
},
height = (int)h,
width = (int)w,
leftOffset = glyphSlot.bitmap_left,
topOffset = glyphSlot.bitmap_top
};
spriteReferences.TryAdd(c, glyphEntry);
spriteMaps.Add(newMap);
}
}
}
}
}
glyphEntry = default;
return(false);
}
private bool TryGlyph(uint c, out GlyphEntry glyphEntry)
{
return(spriteReferences.TryGetValue(c, out glyphEntry) || CacheGlyph(c, out glyphEntry));
}