public SizeF MeasureString(Graphics g, string str)
{
using (GdiObjectSelector selector = new GdiObjectSelector(g, _font))
{
Size size = new Size(0, 0);
Win32FontSystem.GetTextExtentPoint(selector.HDC, str, str.Length, ref size);
return(new SizeF(size.Width, size.Height));
}
}
public float GetBaselinePos(Graphics g, FontStyle style)
{
using (GdiObjectSelector selector = new GdiObjectSelector(g, _font))
{
Win32FontSystem.TEXTMETRIC metrics;
Win32FontSystem.GetTextMetrics(selector.HDC, out metrics);
return(((float)metrics.tmAscent / metrics.tmHeight) * _logFont.lfHeight);
}
}
public float[] GetCharacterXPositions(Graphics g, string str)
{
#if true
// Make sure our _charWidths list has all the necessary characters.
using (GdiObjectSelector selector = new GdiObjectSelector(g, _font))
{
UpdateCharWidths(selector.HDC, str);
}
float[] xCoords = new float[str.Length];
float curXOffset = 0;
for (int i = 0; i < str.Length; i++)
{
xCoords[i] = curXOffset;
Win32FontSystem.ABCFLOAT abc = _charWidths[(uint)str[i]];
curXOffset += abc.abcfA + abc.abcfB + abc.abcfC;
}
return(xCoords);
#else
// This method gives us spacing between character cells, but it doesn't tell us what the cells are!
Win32FontSystem.GCP_RESULTS results = new Win32FontSystem.GCP_RESULTS();
results.StructSize = Marshal.SizeOf(typeof(Win32FontSystem.GCP_RESULTS));
// Setup the int array for them to write results into.
int[] dx = new int[str.Length];
GCHandle handle = GCHandle.Alloc(dx, GCHandleType.Pinned);
results.Dx = Marshal.UnsafeAddrOfPinnedArrayElement(dx, 0);
using (GdiObjectSelector selector = new GdiObjectSelector(g, _font))
{
// Call GetCharacterPlacement
Win32FontSystem.GetCharacterPlacementW(
selector.HDC,
str,
str.Length,
0, // max extent (ignored)
ref results,
(uint)Win32FontSystem.GCPFlags.GCP_USEKERNING);
}
// Unpin the array.
handle.Free();
// Convert to floats for output.
return(dx.Select(x => (float)x).ToArray());
#endif
}
public void DrawString(Graphics g, string str, Brush brush, Point location)
{
SolidBrush solidBrush = brush as SolidBrush;
if (solidBrush == null)
{
throw new Exception("Win32Font.DrawString only supports SolidBrush");
}
using (GdiObjectSelector selector = new GdiObjectSelector(g, _font))
{
// Make a pen to represent the color.
uint crColor = (uint)(solidBrush.Color.R << 0) | (uint)(solidBrush.Color.G << 8) | (uint)(solidBrush.Color.B << 16);
uint prevTextColor = Win32FontSystem.SetTextColor(selector.HDC, crColor);
// Set background mode to transparent.
int oldBKMode = Win32FontSystem.SetBkMode(selector.HDC, Win32FontSystem.BKMODE_TRANSPARENT);
Win32FontSystem.TextOut(selector.HDC, location.X, location.Y, str, str.Length);
Win32FontSystem.SetBkMode(selector.HDC, oldBKMode);
Win32FontSystem.SetTextColor(selector.HDC, prevTextColor);
}
}
public float GetBaselinePos( Graphics g, FontStyle style )
{
using ( GdiObjectSelector selector = new GdiObjectSelector( g, _font ) )
{
Win32FontSystem.TEXTMETRIC metrics;
Win32FontSystem.GetTextMetrics( selector.HDC, out metrics );
return ( ( (float)metrics.tmAscent / metrics.tmHeight ) * _logFont.lfHeight );
}
}
public float[] GetCharacterXPositions( Graphics g, string str )
{
#if true
// Make sure our _charWidths list has all the necessary characters.
using ( GdiObjectSelector selector = new GdiObjectSelector( g, _font ) )
{
UpdateCharWidths( selector.HDC, str );
}
float[] xCoords = new float[ str.Length ];
float curXOffset = 0;
for ( int i=0; i < str.Length; i++ )
{
xCoords[i] = curXOffset;
Win32FontSystem.ABCFLOAT abc = _charWidths[ (uint)str[i] ];
curXOffset += abc.abcfA + abc.abcfB + abc.abcfC;
}
return xCoords;
#else
// This method gives us spacing between character cells, but it doesn't tell us what the cells are!
Win32FontSystem.GCP_RESULTS results = new Win32FontSystem.GCP_RESULTS();
results.StructSize = Marshal.SizeOf( typeof( Win32FontSystem.GCP_RESULTS ) );
// Setup the int array for them to write results into.
int[] dx = new int[ str.Length ];
GCHandle handle = GCHandle.Alloc( dx, GCHandleType.Pinned );
results.Dx = Marshal.UnsafeAddrOfPinnedArrayElement( dx, 0 );
using ( GdiObjectSelector selector = new GdiObjectSelector( g, _font ) )
{
// Call GetCharacterPlacement
Win32FontSystem.GetCharacterPlacementW(
selector.HDC,
str,
str.Length,
0, // max extent (ignored)
ref results,
(uint)Win32FontSystem.GCPFlags.GCP_USEKERNING );
}
// Unpin the array.
handle.Free();
// Convert to floats for output.
return dx.Select( x => (float)x ).ToArray();
#endif
}
public void DrawString( Graphics g, string str, Brush brush, Point location )
{
SolidBrush solidBrush = brush as SolidBrush;
if ( solidBrush == null )
throw new Exception( "Win32Font.DrawString only supports SolidBrush" );
using ( GdiObjectSelector selector = new GdiObjectSelector( g, _font ) )
{
// Make a pen to represent the color.
uint crColor = (uint)( solidBrush.Color.R << 0 ) | (uint)( solidBrush.Color.G << 8 ) | (uint)( solidBrush.Color.B << 16 );
uint prevTextColor = Win32FontSystem.SetTextColor( selector.HDC, crColor );
// Set background mode to transparent.
int oldBKMode = Win32FontSystem.SetBkMode( selector.HDC, Win32FontSystem.BKMODE_TRANSPARENT );
Win32FontSystem.TextOut( selector.HDC, location.X, location.Y, str, str.Length );
Win32FontSystem.SetBkMode( selector.HDC, oldBKMode );
Win32FontSystem.SetTextColor( selector.HDC, prevTextColor );
}
}
public SizeF MeasureString( Graphics g, string str )
{
using ( GdiObjectSelector selector = new GdiObjectSelector( g, _font ) )
{
Size size = new Size( 0, 0 );
Win32FontSystem.GetTextExtentPoint( selector.HDC, str, str.Length, ref size );
return new SizeF( size.Width, size.Height );
}
}
