/// <summary>
/// <para>Constructs a new <see cref="T:Xsharp.Image"/> instance
/// that represents an off-screen image that was loaded
/// from a file.</para>
/// </summary>
///
/// <param name="screen">
/// <para>The screen upon which to create the new pixmap.</para>
/// </param>
///
/// <param name="filename">
/// <para>The file to load the image from.</para>
/// </param>
///
/// <exception cref="T:System.ArgumentNullException">
/// <para>The <paramref name="filename"/> parameter is
/// <see langword="null"/>.</para>
/// </exception>
///
/// <exception cref="T:System.FormatException">
/// <para>The image format is not recognized.</para>
/// </exception>
///
/// <exception cref="T:Xsharp.XInvalidOperationException">
/// <para>Raised if <paramref name="filename"/> could not be
/// loaded for some reason.</para>
/// </exception>
public Image(Screen screen, String filename)
{
Display dpy;
if (filename == null)
{
throw new ArgumentNullException("filename");
}
if (screen != null)
{
dpy = screen.DisplayOfScreen;
}
else
{
dpy = Application.Primary.Display;
screen = dpy.DefaultScreenOfDisplay;
}
this.screen = screen;
DotGNU.Images.Image img = new DotGNU.Images.Image();
img.Load(filename);
Frame frame = img.GetFrame(0);
try
{
dpy.Lock();
pixmapXImage = ConvertImage.FrameToXImage(screen, frame);
maskXImage = ConvertImage.MaskToXImage(screen, frame);
}
finally
{
dpy.Unlock();
}
}
/// <summary>
/// <para>Constructs a new <see cref="T:Xsharp.Image"/> instance
/// from a <see cref="T:DotGNU.Images.Frame"/> instance.</para>
/// </summary>
///
/// <param name="screen">
/// <para>The screen upon which to create the new image.</para>
/// </param>
///
/// <param name="frame">
/// <para>The frame to load the image from.</para>
/// </param>
///
/// <exception cref="T:System.ArgumentNullException">
/// <para>The <paramref name="frame"/> parameter is
/// <see langword="null"/>.</para>
/// </exception>
///
/// <exception cref="T:Xsharp.XInvalidOperationException">
/// <para>Raised if <paramref name="filename"/> could not be
/// loaded for some reason.</para>
/// </exception>
public Image(Screen screen, Frame frame)
{
Display dpy;
if (frame == null)
{
throw new ArgumentNullException("frame");
}
if (screen != null)
{
dpy = screen.DisplayOfScreen;
}
else
{
dpy = Application.Primary.Display;
screen = dpy.DefaultScreenOfDisplay;
}
this.screen = screen;
try
{
dpy.Lock();
pixmapXImage = ConvertImage.FrameToXImage(screen, frame);
maskXImage = ConvertImage.MaskToXImage(screen, frame);
}
finally
{
dpy.Unlock();
}
}
/// <summary>
/// <para>Create a new cursor, based on a user-supplied image frame.</para>
/// </summary>
///
/// <param name="screen">
/// <para>The screen to create the cursor for, or
/// <see langword="null"/> for the default screen on the
/// default display.</para>
/// </param>
///
/// <param name="frame">
/// <para>The frame defining the cursor image.</para>
/// </param>
///
/// <exception cref="T:System.ArgumentNullException"/>
/// <para>Raised if <paramref name="frame"/> is
/// <see langword="null"/>.</para>
/// </exception>
public Cursor(Screen screen, Frame frame)
{
Display dpy;
if (frame == null)
{
throw new ArgumentNullException("frame");
}
if (screen != null)
{
dpy = screen.DisplayOfScreen;
}
else
{
dpy = Application.Primary.Display;
screen = dpy.DefaultScreenOfDisplay;
}
if ( /* irgnore pixel format! frame.PixelFormat != PixelFormat.Format1bppIndexed || */
frame.Mask == null)
{
// The frame is not suitable for use as a cursor.
this.type = CursorType.XC_left_ptr;
this.source = null;
this.mask = null;
this.cursor = XCursor.Zero;
}
else
{
this.type = CursorType.XC_inherit_parent;
this.cursor = XCursor.Zero;
try
{
dpy.Lock();
IntPtr pixmapXImage =
ConvertImage.FrameToXImageBitmap(screen, frame);
IntPtr maskXImage = ConvertImage.MaskToXImage
(screen, frame);
source = ConvertImage.XImageMaskToBitmap
(screen, pixmapXImage);
mask = ConvertImage.XImageMaskToBitmap
(screen, maskXImage);
Xlib.XSharpDestroyImage(pixmapXImage);
Xlib.XSharpDestroyImage(maskXImage);
hotspotX = frame.HotspotX;
hotspotY = frame.HotspotY;
if (frame.Palette != null && frame.Palette[0] == 0)
{
reverse = true;
}
}
finally
{
dpy.Unlock();
}
}
}
