/// <summary>
/// Function to get the kerning pairs for a font.
/// </summary>
/// <returns>A list of kerning pair values for the active font.</returns>
public static KERNINGPAIR[] GetKerningPairs()
{
KERNINGPAIR[] pairs;
if (_hdc == IntPtr.Zero)
{
throw new GorgonException(GorgonResult.CannotEnumerate, Resources.GORGFX_ERR_FONT_CANNOT_RETRIEVE_KERNING);
}
MapModes lastMode = SetMapMode(_hdc, MapModes.MM_TEXT);
try
{
// Get the number of pairs.
int size = (int)GetKerningPairsW(_hdc, 0, null);
// If we have no pairs, then leave here.
if (size == 0)
{
return(Array.Empty <KERNINGPAIR>());
}
pairs = new KERNINGPAIR[size];
KERNINGPAIR *pairPtr = stackalloc KERNINGPAIR[size];
if (GetKerningPairsW(_hdc, (uint)size, pairPtr) == 0)
{
throw new GorgonException(GorgonResult.CannotEnumerate, Resources.GORGFX_ERR_FONT_CANNOT_RETRIEVE_KERNING);
}
for (int i = 0; i < size; i++)
{
pairs[i] = pairPtr[i];
}
}
finally
{
SetMapMode(_hdc, lastMode);
}
return(pairs);
}
private static extern uint GetKerningPairsW(IntPtr HDC, uint numberOfPairs, KERNINGPAIR *kernPairs);