internal static XFontSource GetOrCreateFromGdi(string typefaceKey, GdiFont gdiFont)
{
byte[] bytes = ReadFontBytesFromGdi(gdiFont);
XFontSource fontSource = GetOrCreateFrom(typefaceKey, bytes);
return(fontSource);
}
static BitmapRenderer()
{
try
{
DefaultTextFont = new System.DrawingCore.Font("Arial", 10, System.DrawingCore.FontStyle.Regular);
}
catch (Exception)
{
// have to ignore, no better idea
}
}
/// <summary>
/// Initializes a new instance of the <see cref="BitmapRenderer"/> class.
/// </summary>
public BitmapRenderer()
{
Foreground = System.DrawingCore.Color.Black;
Background = System.DrawingCore.Color.White;
TextFont = DefaultTextFont;
}
static byte[] ReadFontBytesFromGdi(GdiFont gdiFont)
{
// Weird: LastError is always 123 or 127. Comment out Debug.Assert.
int error = Marshal.GetLastWin32Error();
//Debug.Assert(error == 0);
error = Marshal.GetLastWin32Error();
//Debug.Assert(error == 0);
IntPtr hfont = gdiFont.ToHfont();
#if true
IntPtr hdc = NativeMethods.GetDC(IntPtr.Zero);
#else
NativeMethods.LOGFONT logFont = new NativeMethods.LOGFONT();
logFont.lfHeight = 30;
logFont.lfWidth = 0;
logFont.lfEscapement = 0;
logFont.lfOrientation = 0;
logFont.lfWeight = 400;
logFont.lfItalic = 0;
logFont.lfUnderline = 0;
logFont.lfStrikeOut = 0;
logFont.lfCharSet = 0;
logFont.lfOutPrecision = 0;
logFont.lfClipPrecision = 0;
logFont.lfQuality = 0;
logFont.lfPitchAndFamily = 0;
logFont.lfFaceName = "Arial";
gdiFont.ToLogFont(logFont);
hfont = NativeMethods.CreateFontIndirect(logFont);
// IntPtr hdc = NativeMethods.CreateDC("DISPLAY", null, null, IntPtr.Zero);
IntPtr hdc = NativeMethods.CreateCompatibleDC(IntPtr.Zero);
#endif
error = Marshal.GetLastWin32Error();
//Debug.Assert(error == 0);
IntPtr oldFont = NativeMethods.SelectObject(hdc, hfont);
error = Marshal.GetLastWin32Error();
//Debug.Assert(error == 0);
// Get size of the font file.
bool isTtcf = false;
// In Azure I get 0xc0000022
int size = NativeMethods.GetFontData(hdc, 0, 0, null, 0);
// Check for ntstatus.h: #define STATUS_ACCESS_DENIED ((NTSTATUS)0xC0000022L)
if ((uint)size == 0xc0000022)
{
throw new InvalidOperationException("Microsoft Azure returns STATUS_ACCESS_DENIED ((NTSTATUS)0xC0000022L) from GetFontData. This is a bug in Azure. You must implement a FontResolver to circumvent this issue.");
}
if (size == NativeMethods.GDI_ERROR)
{
// Assume that the font file is a true type collection.
size = NativeMethods.GetFontData(hdc, ttcf, 0, null, 0);
isTtcf = true;
}
error = Marshal.GetLastWin32Error();
//Debug.Assert(error == 0);
if (size == 0)
{
throw new InvalidOperationException("Cannot retrieve font data.");
}
byte[] bytes = new byte[size];
int effectiveSize = NativeMethods.GetFontData(hdc, isTtcf ? ttcf : 0, 0, bytes, size);
Debug.Assert(size == effectiveSize);
// Clean up.
NativeMethods.SelectObject(hdc, oldFont);
NativeMethods.ReleaseDC(IntPtr.Zero, hdc);
return(bytes);
}