/// <include file='doc\Font.uex' path='docs/doc[@for="Font.GetHeight1"]/*' />
/// <devdoc>
/// </devdoc>
public float GetHeight()
{
IntPtr screenDC = UnsafeNativeMethods.GetDC(NativeMethods.NullHandleRef);
float height = 0.0f;
try {
using (Graphics graphics = Graphics.FromHdcInternal(screenDC)) {
height = GetHeight(graphics);
}
}
finally {
UnsafeNativeMethods.ReleaseDC(NativeMethods.NullHandleRef, new HandleRef(null, screenDC));
}
return(height);
}
public void ToLogFont(object logFont)
{
IntPtr dC = System.Drawing.UnsafeNativeMethods.GetDC(System.Drawing.NativeMethods.NullHandleRef);
try
{
using (Graphics graphics = Graphics.FromHdcInternal(dC))
{
this.ToLogFont(logFont, graphics);
}
}
finally
{
System.Drawing.UnsafeNativeMethods.ReleaseDC(System.Drawing.NativeMethods.NullHandleRef, new HandleRef(null, dC));
}
}
// Operations
/// <include file='doc\Font.uex' path='docs/doc[@for="Font.ToLogFont"]/*' />
/// <devdoc>
/// <para>[To be supplied.]</para>
/// </devdoc>
public void ToLogFont(object logFont)
{
IntPtr screenDC = UnsafeNativeMethods.GetDC(NativeMethods.NullHandleRef);
try {
Graphics graphics = Graphics.FromHdcInternal(screenDC);
try {
this.ToLogFont(logFont, graphics);
}
finally {
graphics.Dispose();
}
}
finally {
UnsafeNativeMethods.ReleaseDC(NativeMethods.NullHandleRef, new HandleRef(null, screenDC));
}
}
public float GetHeight()
{
IntPtr dC = System.Drawing.UnsafeNativeMethods.GetDC(System.Drawing.NativeMethods.NullHandleRef);
float height = 0f;
try
{
using (Graphics graphics = Graphics.FromHdcInternal(dC))
{
height = this.GetHeight(graphics);
}
}
finally
{
System.Drawing.UnsafeNativeMethods.ReleaseDC(System.Drawing.NativeMethods.NullHandleRef, new HandleRef(null, dC));
}
return(height);
}
private Graphics CreateBuffer(IntPtr src, int offsetX, int offsetY, int width, int height)
{
this.busy = 2;
this.DisposeDC();
this.busy = 1;
this.compatDC = System.Drawing.UnsafeNativeMethods.CreateCompatibleDC(new HandleRef(null, src));
if ((width > this.bufferSize.Width) || (height > this.bufferSize.Height))
{
int ulWidth = Math.Max(width, this.bufferSize.Width);
int ulHeight = Math.Max(height, this.bufferSize.Height);
this.busy = 2;
this.DisposeBitmap();
this.busy = 1;
IntPtr zero = IntPtr.Zero;
this.dib = this.CreateCompatibleDIB(src, IntPtr.Zero, ulWidth, ulHeight, ref zero);
this.bufferSize = new Size(ulWidth, ulHeight);
}
this.oldBitmap = SafeNativeMethods.SelectObject(new HandleRef(this, this.compatDC), new HandleRef(this, this.dib));
this.compatGraphics = Graphics.FromHdcInternal(this.compatDC);
this.compatGraphics.TranslateTransform((float)-this.targetLoc.X, (float)-this.targetLoc.Y);
this.virtualSize = new Size(width, height);
return(this.compatGraphics);
}
private Graphics CreateBuffer(IntPtr src, int offsetX, int offsetY, int width, int height)
{
//create the compat DC
busy = BUFFER_BUSY_DISPOSING;
DisposeDC();
busy = BUFFER_BUSY_PAINTING;
compatDC = UnsafeNativeMethods.CreateCompatibleDC(new HandleRef(null, src));
//recreate the bitmap if necessary
if (width > bufferSize.Width || height > bufferSize.Height)
{
Debug.WriteLineIf(DoubleBuffering.TraceInfo, "allocating new bitmap: " + width + " x " + height);
int optWidth = Math.Max(width, bufferSize.Width);
int optHeight = Math.Max(height, bufferSize.Height);
busy = BUFFER_BUSY_DISPOSING;
DisposeBitmap();
busy = BUFFER_BUSY_PAINTING;
Debug.WriteLineIf(DoubleBuffering.TraceInfo, " new size : " + optWidth + " x " + optHeight);
IntPtr pvbits = IntPtr.Zero;
dib = CreateCompatibleDIB(src, IntPtr.Zero, optWidth, optHeight, ref pvbits);
bufferSize = new Size(optWidth, optHeight);
}
//select the bitmap
oldBitmap = SafeNativeMethods.SelectObject(new HandleRef(this, compatDC), new HandleRef(this, dib));
//create compat graphics
Debug.WriteLineIf(DoubleBuffering.TraceInfo, " Create compatGraphics");
compatGraphics = Graphics.FromHdcInternal(compatDC);
compatGraphics.TranslateTransform(-targetLoc.X, -targetLoc.Y);
virtualSize = new Size(width, height);
return(compatGraphics);
}
