public unsafe void RasterizeGlyphBitmap(int glyphId, int fontSize, byte[] buffer, int startIndex, int outWidth, int outHeight, int outStride)
{
SetPixelSizes(0, fontSize);
LoadGlyph(glyphId);
FTNative.FT_Render_Glyph(_rec.glyph, (int)RenderMode.Normal);
GlyphSlotRec glyph;
GetCurrentGlyph(out glyph);
var ftbmp = glyph.bitmap;
fixed(byte *bptr = buffer)
{
for (var y = 0; y < outHeight; ++y)
{
var pos = (y * outStride) + startIndex;
byte *dst = bptr + pos;
byte *src = (byte *)ftbmp.buffer + y * ftbmp.pitch;
for (var x = 0; x < outWidth; ++x)
{
*dst++ = *src++;
}
}
}
}
public FreeTypeSource(byte[] data)
{
Error err;
if (_libraryHandle == IntPtr.Zero)
{
IntPtr libraryRef;
err = FTNative.FT_Init_FreeType(out libraryRef);
if (err != Error.Ok)
{
throw new FreeTypeException(err);
}
_libraryHandle = libraryRef;
}
_memoryHandle = GCHandle.Alloc(data, GCHandleType.Pinned);
IntPtr faceRef;
err = FTNative.FT_New_Memory_Face(_libraryHandle, _memoryHandle.AddrOfPinnedObject(), data.Length, 0, out faceRef);
if (err != Error.Ok)
{
throw new FreeTypeException(err);
}
_faceHandle = faceRef;
_rec = PInvokeHelper.PtrToStructure <FaceRec>(_faceHandle);
}
private void SetPixelSizes(int width, int height)
{
var err = FTNative.FT_Set_Pixel_Sizes(_faceHandle, (uint)width, (uint)height);
if (err != Error.Ok)
{
throw new FreeTypeException(err);
}
}
private void LoadGlyph(int glyphId)
{
var err = FTNative.FT_Load_Glyph(_faceHandle, (uint)glyphId, (int)LoadFlags.Default | (int)LoadTarget.Normal);
if (err != Error.Ok)
{
throw new FreeTypeException(err);
}
}
public int GetGlyphKernAdvance(int previousGlyphId, int glyphId, int fontSize)
{
VectorRec kerning;
if (FTNative.FT_Get_Kerning(_faceHandle, (uint)previousGlyphId, (uint)glyphId, 0, out kerning) != Error.Ok)
{
return(0);
}
return((int)kerning.X >> 6);
}
public int?GetGlyphId(int codepoint)
{
var result = FTNative.FT_Get_Char_Index(_faceHandle, (uint)codepoint);
if (result == 0)
{
return(null);
}
return((int?)result);
}
protected virtual void Dispose(bool disposing)
{
if (_faceHandle != IntPtr.Zero)
{
FTNative.FT_Done_Face(_faceHandle);
_faceHandle = IntPtr.Zero;
}
if (_memoryHandle.IsAllocated)
{
_memoryHandle.Free();
}
}