internal static void MeasureCharWidths(IntPtr hFont,
out int[] charWidths,
out NativeTextWin32.FontABC[] abcSizes)
{
//only in ascii range
//current version
charWidths = new int[MAX_CODEPOINT_NO + 1]; //
MyWin32.SelectObject(win32MemDc.DC, hFont);
unsafe
{
//see: https://msdn.microsoft.com/en-us/library/ms404377(v=vs.110).aspx
//A code page contains 256 code points and is zero-based.
//In most code pages, code points 0 through 127 represent the ASCII character set,
//and code points 128 through 255 differ significantly between code pages
abcSizes = new NativeTextWin32.FontABC[MAX_CODEPOINT_NO + 1];
fixed(NativeTextWin32.FontABC *abc = abcSizes)
{
NativeTextWin32.GetCharABCWidths(win32MemDc.DC, (uint)0, (uint)MAX_CODEPOINT_NO, abc);
}
for (int i = 0; i < (MAX_CODEPOINT_NO + 1); ++i)
{
charWidths[i] = abcSizes[i].Sum;
}
}
}
public void MeasureCharWidths(IntPtr hFont, out int[] charWidths, out NativeTextWin32.FontABC[] abcSizes)
{
if (!isInit)
{
Init();
}
//only in ascii range
//current version
charWidths = new int[256];
MyWin32.SelectObject(hdc, hFont);
unsafe
{
abcSizes = new NativeTextWin32.FontABC[256];
fixed(NativeTextWin32.FontABC *abc = abcSizes)
{
NativeTextWin32.GetCharABCWidths(hdc, (uint)0, (uint)255, abc);
}
for (int i = 0; i < 161; i++)
{
charWidths[i] = abcSizes[i].Sum;
}
for (int i = 161; i < 255; i++)
{
charWidths[i] = abcSizes[i].Sum;
}
}
}