コード例 #1
0
        private void UpdateImage()
        {
            if (bmp.Handle != IntPtr.Zero) //以下代码将原始图像数据用来进行图像!
            {
                Win32Api.CopyMemory((IntPtr)bmp.Pointer, (IntPtr)DataCopy, bmp.Stride * bmp.Height);
            }
            switch (filters)
            {
            case FiltersMethod.BoxBlur:
                BlurEffect.BoxBlur(bmp, (int)trbValue.Value);
                break;

            case FiltersMethod.Mosaic:
                BlurEffect.Mosaic(bmp, (int)trbValue.Value);
                break;
            }
            Graphics G   = picPreview.CreateGraphics();
            IntPtr   Hdc = G.GetHdc();

            bmp.DrawImage(Hdc, DestX, DestY, ViewWidth, ViewHeight, 0, 0, bmp.Width, bmp.Height);
            G.ReleaseHdc();
            G.Dispose();
            picPreview.Invalidate();

            Graphics Gcanvas   = canvas.CreateGraphics();
            IntPtr   canvasHdc = Gcanvas.GetHdc();

            bmp.DrawImage(canvasHdc, 0, 0, canvas.Width, canvas.Height, 0, 0, bmp.Width, bmp.Height);
            Gcanvas.ReleaseHdc();
            Gcanvas.Dispose();
            canvas.Invalidate();
        }