Beispiel #1
0
        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;
        }
Beispiel #2
0
        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);
        }