public static IconHandle Create(ImageSource imageSource)
{
IconHandle result = IconHandle.Invalid;
if (imageSource != null) {
// Initialize bitmap rectangle and try to cast image source to bitmap frame
Rect bitmapRect = new Rect(new Size(imageSource.Width, imageSource.Height));
BitmapFrame bitmapFrame = imageSource as BitmapFrame;
if (bitmapFrame == null || !(bitmapFrame.Decoder is IconBitmapDecoder)) {
// Create drawing visual
DrawingVisual drawingVisual = new DrawingVisual();
// Open drawing context and draw the image to the visual
using (DrawingContext drawingContext = drawingVisual.RenderOpen()) {
// Render the image and close drawing context
drawingContext.DrawImage(imageSource, bitmapRect);
}
// Create render target bitmap and render the visual
RenderTargetBitmap renderTargetBitmap =
new RenderTargetBitmap((Int32)bitmapRect.Width, (Int32)bitmapRect.Height,
96.0d, 96.0d, PixelFormats.Pbgra32);
renderTargetBitmap.Render(drawingVisual);
renderTargetBitmap.Freeze();
// Create bitmap frame from the render target bitmap
bitmapFrame = BitmapFrame.Create(renderTargetBitmap);
}
// Copy pixels from bitmap frame to pixel array
Int32 stride = (bitmapFrame.Format.BitsPerPixel * bitmapFrame.PixelWidth + 31) / 32 * 4;
Byte[] pixelArray = new Byte[stride * bitmapFrame.PixelHeight];
bitmapFrame.CopyPixels(pixelArray, stride, 0);
// Mask & icon bitmap handles
IntPtr maskBitmapPtr = IntPtr.Zero;
IntPtr iconBitmapPtr = IntPtr.Zero;
// Initialize BITMAPINFO/BITMAPINFOHEADER structure
NativeMethods.BITMAPINFO bmi = new NativeMethods.BITMAPINFO();
bmi.bmiHeader.biSize = (UInt32)Marshal.SizeOf(typeof(NativeMethods.BITMAPINFOHEADER));
bmi.bmiHeader.biWidth = (Int32)bitmapRect.Width;
bmi.bmiHeader.biHeight -= ((Int32)bitmapRect.Height);
bmi.bmiHeader.biPlanes = 1;
bmi.bmiHeader.biBitCount = (UInt16)bitmapFrame.Format.BitsPerPixel;
// DIB handle
IntPtr dibPtr = IntPtr.Zero;
// Create icon bitmap DIB section
iconBitmapPtr = NativeMethods.CreateDIBSection(IntPtr.Zero, ref bmi, 0, out dibPtr,
IntPtr.Zero, 0);
// Validate icon bitmap handle
if (iconBitmapPtr != IntPtr.Zero && dibPtr != IntPtr.Zero) {
// Copy pixels to unmanaged memory
Marshal.Copy(pixelArray, 0, dibPtr, pixelArray.Length);
// Create mask bitmap
maskBitmapPtr = NativeMethods.CreateBitmap((Int32)bitmapRect.Width,
(Int32)bitmapRect.Height,
1, 1, IntPtr.Zero);
if (maskBitmapPtr != IntPtr.Zero) {
// Create and initialize ICONINFO structure
NativeMethods.ICONINFO iconInfo = new NativeMethods.ICONINFO();
iconInfo.fIcon = true;
iconInfo.hbmMask = maskBitmapPtr;
iconInfo.hbmColor = iconBitmapPtr;
// Create icon handle
IntPtr iconPtr = NativeMethods.CreateIconIndirect(ref iconInfo);
if (iconPtr != IntPtr.Zero) {
result = new IconHandle(iconPtr);
}
}
}
// Clean up resources
if (maskBitmapPtr != IntPtr.Zero) {
NativeMethods.DeleteObject(maskBitmapPtr);
}
if (iconBitmapPtr != IntPtr.Zero) {
NativeMethods.DeleteObject(iconBitmapPtr);
}
}
// Return result
return result;
}
public static IconHandle Create(ImageSource imageSource)
{
IconHandle result = IconHandle.Invalid;
if (imageSource != null)
{
// Initialize bitmap rectangle and try to cast image source to bitmap frame
Rect bitmapRect = new Rect(new Size(imageSource.Width, imageSource.Height));
BitmapFrame bitmapFrame = imageSource as BitmapFrame;
if (bitmapFrame == null || !(bitmapFrame.Decoder is IconBitmapDecoder))
{
// Create drawing visual
DrawingVisual drawingVisual = new DrawingVisual();
// Open drawing context and draw the image to the visual
using (DrawingContext drawingContext = drawingVisual.RenderOpen()) {
// Render the image and close drawing context
drawingContext.DrawImage(imageSource, bitmapRect);
}
// Create render target bitmap and render the visual
RenderTargetBitmap renderTargetBitmap =
new RenderTargetBitmap((Int32)bitmapRect.Width, (Int32)bitmapRect.Height,
96.0d, 96.0d, PixelFormats.Pbgra32);
renderTargetBitmap.Render(drawingVisual);
renderTargetBitmap.Freeze();
// Create bitmap frame from the render target bitmap
bitmapFrame = BitmapFrame.Create(renderTargetBitmap);
}
// Copy pixels from bitmap frame to pixel array
Int32 stride = (bitmapFrame.Format.BitsPerPixel * bitmapFrame.PixelWidth + 31) / 32 * 4;
Byte[] pixelArray = new Byte[stride * bitmapFrame.PixelHeight];
bitmapFrame.CopyPixels(pixelArray, stride, 0);
// Mask & icon bitmap handles
IntPtr maskBitmapPtr = IntPtr.Zero;
IntPtr iconBitmapPtr = IntPtr.Zero;
// Initialize BITMAPINFO/BITMAPINFOHEADER structure
NativeMethods.BITMAPINFO bmi = new NativeMethods.BITMAPINFO();
bmi.bmiHeader.biSize = (UInt32)Marshal.SizeOf(typeof(NativeMethods.BITMAPINFOHEADER));
bmi.bmiHeader.biWidth = (Int32)bitmapRect.Width;
bmi.bmiHeader.biHeight -= ((Int32)bitmapRect.Height);
bmi.bmiHeader.biPlanes = 1;
bmi.bmiHeader.biBitCount = (UInt16)bitmapFrame.Format.BitsPerPixel;
// DIB handle
IntPtr dibPtr = IntPtr.Zero;
// Create icon bitmap DIB section
iconBitmapPtr = NativeMethods.CreateDIBSection(IntPtr.Zero, ref bmi, 0, out dibPtr,
IntPtr.Zero, 0);
// Validate icon bitmap handle
if (iconBitmapPtr != IntPtr.Zero && dibPtr != IntPtr.Zero)
{
// Copy pixels to unmanaged memory
Marshal.Copy(pixelArray, 0, dibPtr, pixelArray.Length);
// Create mask bitmap
maskBitmapPtr = NativeMethods.CreateBitmap((Int32)bitmapRect.Width,
(Int32)bitmapRect.Height,
1, 1, IntPtr.Zero);
if (maskBitmapPtr != IntPtr.Zero)
{
// Create and initialize ICONINFO structure
NativeMethods.ICONINFO iconInfo = new NativeMethods.ICONINFO();
iconInfo.fIcon = true;
iconInfo.hbmMask = maskBitmapPtr;
iconInfo.hbmColor = iconBitmapPtr;
// Create icon handle
IntPtr iconPtr = NativeMethods.CreateIconIndirect(ref iconInfo);
if (iconPtr != IntPtr.Zero)
{
result = new IconHandle(iconPtr);
}
}
}
// Clean up resources
if (maskBitmapPtr != IntPtr.Zero)
{
NativeMethods.DeleteObject(maskBitmapPtr);
}
if (iconBitmapPtr != IntPtr.Zero)
{
NativeMethods.DeleteObject(iconBitmapPtr);
}
}
// Return result
return(result);
}
