public bool TryGetGlyphRect(int glyphIndex, Vector2 scale, Point oversample, Vector2 shift, out Rectangle rectangle)
{
if (TT.GetGlyphBitmapBoxSubpixel(
FontInfo, glyphIndex, scale * oversample, shift, out TT.IntRect rect))
{
rectangle = new Rectangle(rect.X, rect.Y, rect.W, rect.H);
return(true);
}
rectangle = default;
return(false);
}
public bool GetGlyphBox(int glyphIndex, out RectangleF glyphBox)
{
if (TT.GetGlyphBox(FontInfo, glyphIndex, out var rectBox))
{
glyphBox = new RectangleF(
rectBox.X, rectBox.Y,
rectBox.W, rectBox.H);
return(true);
}
glyphBox = default;
return(false);
}
public static RectangleF GetDrawRectangle(Rectangle rectangle, Point oversample, Vector2 shift)
{
int w = rectangle.Width + oversample.X - 1;
int h = rectangle.Height + oversample.Y - 1;
float sub_x = TT.OversampleShift(oversample.X);
float sub_y = TT.OversampleShift(oversample.Y);
float drawX = (rectangle.X - shift.X) / oversample.X + sub_x;
float drawY = (rectangle.Y - shift.Y) / oversample.Y + sub_y;
float drawW = w / (float)oversample.X + sub_x;
float drawH = h / (float)oversample.Y + sub_y;
RectangleF drawRectangle = new (drawX, drawY, drawW, drawH);
return(drawRectangle);
}
public bool TryGetGlyphBitmap(
int glyphIndex, Vector2 scale, Point oversample, Vector2 shift,
[MaybeNullWhen(false)] out Image <Alpha8> image,
out RectangleF drawRectangle)
{
if (!TryGetGlyphRect(glyphIndex, scale, oversample, shift, out Rectangle rect))
{
image = default;
drawRectangle = default;
return(false);
}
int w = rect.Width + oversample.X - 1;
int h = rect.Height + oversample.Y - 1;
image = Image <Alpha8> .CreateUninitialized(w, h);
TT.Bitmap glyphBmp = GetTTBitmap(image, rect.Width, rect.Height);
TT.MakeGlyphBitmap(
FontInfo,
glyphBmp,
0.35f,
scale * oversample,
shift,
TT.IntPoint.Zero,
glyphIndex);
TT.Bitmap filterBmp = GetTTBitmap(image, w, h);
if (oversample.X > 1)
{
TT.HorizontalPrefilter(filterBmp, oversample.X);
}
if (oversample.Y > 1)
{
TT.VerticalPrefilter(filterBmp, oversample.Y);
}
drawRectangle = GetDrawRectangle(rect, oversample, shift);
return(true);
}
public float GetScaleByEm(float pixels)
{
return(TT.ScaleForMappingEmToPixels(FontInfo, pixels));
}
public float GetScaleByPixel(float pixelHeight)
{
return(TT.ScaleForPixelHeight(FontInfo, pixelHeight));
}
public int GetGlyphIndex(int codepoint)
{
return(TT.FindGlyphIndex(FontInfo, codepoint));
}
public void GetFontVMetrics(out int ascent, out int descent, out int lineGap)
{
TT.GetFontVMetrics(FontInfo, out ascent, out descent, out lineGap);
}
public void GetGlyphHMetrics(int glyphIndex, out int advanceWidth, out int leftSideBearing)
{
TT.GetGlyphHMetrics(FontInfo, glyphIndex, out advanceWidth, out leftSideBearing);
}
public int?GetGlyphKernAdvance(int glyphIndex1, int glyphIndex2)
{
return(TT.GetGlyphKernAdvance(FontInfo, glyphIndex1, glyphIndex2));
}
public bool GetGlyphRightSideBearing(int glyphIndex, out float rightSideBearing)
{
return(TT.GetGlyphRightSideBearing(FontInfo, glyphIndex, out rightSideBearing));
}
public Font(ReadOnlyMemory <byte> fontData)
{
FontInfo = new TT.FontInfo();
TT.InitFont(FontInfo, fontData);
}
