/* ----------------------------------------------------------
* 文件名称：ImageUtils.cs
*
* 作者：秦建辉
*
* 微信：splashcn
*
* 博客：http://www.firstsolver.com/wordpress/
*
* 开发环境：
* Visual Studio V2017
* .NET Framework 4 Client Profile
*
* 版本历史：
* V1.0 2018年01月03日
* 实现Bitmap和BitmapSource之间的转换
* ------------------------------------------------------------ */
using System.Drawing.Imaging;
using System.Windows.Media.Imaging;
namespace Com.FirstSolver.Splash
{
public static class ImageUtils
{
/// <summary>
/// 将 InkCanvas 笔迹 转化为 BitmapSource 图像
/// </summary>
/// <param name="canvas"/>InkCanvas 控件
/// <returns>存储笔画图像的 BitmapSource</returns>
public static BitmapSource ToBitmapSource(this System.Windows.Controls.InkCanvas canvas)
{
// 获取笔画边界
System.Windows.Rect rect = canvas.Strokes.GetBounds();
// 获取笔画轮廓几何图形
double width = canvas.DefaultDrawingAttributes.Width; // 笔画宽度
double height = canvas.DefaultDrawingAttributes.Height; // 笔画高度
System.Windows.Media.RectangleGeometry geometry = new System.Windows.Media.RectangleGeometry(new System.Windows.Rect(rect.X - width / 2, rect.Y - height / 2, rect.Width + width, rect.Height + height));
canvas.Clip = geometry;
canvas.UpdateLayout();
// 将笔画转换为图像
RenderTargetBitmap bitmap = new RenderTargetBitmap((int)geometry.Rect.Width, (int)geometry.Rect.Height, 96, 96, System.Windows.Media.PixelFormats.Default);
System.Windows.Media.DrawingVisual visual = new System.Windows.Media.DrawingVisual();
using (System.Windows.Media.DrawingContext context = visual.RenderOpen())
{
context.DrawRectangle(new System.Windows.Media.VisualBrush(canvas), null, new System.Windows.Rect(0, 0, geometry.Rect.Width, geometry.Rect.Height));
}
bitmap.Render(visual);
canvas.Clip = null;
return bitmap;
}
/// <summary>
/// 将 Bitmap 转化为 BitmapSource
/// </summary>
/// <param name="bmp"/>要转换的 Bitmap
/// <returns>转换后的 BitmapSource</returns>
public static BitmapSource ToBitmapSource(this System.Drawing.Bitmap bmp)
{
System.IntPtr hBitmap = bmp.GetHbitmap();
try
{
return System.Windows.Interop.Imaging.CreateBitmapSourceFromHBitmap(hBitmap, System.IntPtr.Zero, System.Windows.Int32Rect.Empty, BitmapSizeOptions.FromEmptyOptions());
}
finally
{
DeleteObject(hBitmap);
}
}
/// <summary>
/// 将 Bitmap 转化为 BitmapSource
/// </summary>
/// <param name="bmp"/>要转换的 Bitmap
/// <returns>转换后的 BitmapImage</returns>
public static BitmapImage ToBitmapImage(this System.Drawing.Bitmap bmp)
{
System.IO.MemoryStream ms = new System.IO.MemoryStream();
bmp.Save(ms, ImageFormat.Bmp);
BitmapImage image = new BitmapImage();
image.BeginInit();
image.StreamSource = ms;
image.EndInit();
return image;
}
/// <summary>
/// 将字节数组转换为 BitmapImage
/// </summary>
/// <param name="bytes">要转换的字节数组</param>
/// <returns>转换后的 BitmapImage</returns>
public static BitmapImage ToBitmapImage(this byte[] bytes)
{
BitmapImage image = new BitmapImage();
image.BeginInit();
image.StreamSource = new System.IO.MemoryStream(bytes);
image.EndInit();
return image;
}
/// <summary>
/// 将 Bitmap 转化为字节数组
/// </summary>
/// <param name="bmp">要转换的 Bitmap</param>
/// <returns>转换后的字节数组</returns>
public static byte[] ToByteArray(this System.Drawing.Bitmap bmp)
{
using (System.IO.MemoryStream ms = new System.IO.MemoryStream())
{
bmp.Save(ms, ImageFormat.Bmp);
return ms.ToArray();
}
}
/// <summary>
/// 将 BitmapSource 转化为 Bitmap
/// </summary>
/// <param name="source"/>要转换的 BitmapSource
/// <returns>转化后的 Bitmap</returns>
public static System.Drawing.Bitmap ToBitmap(this BitmapSource source)
{
using (System.IO.MemoryStream ms = new System.IO.MemoryStream())
{
BitmapEncoder encoder = new BmpBitmapEncoder();
encoder.Frames.Add(BitmapFrame.Create(source));
encoder.Save(ms);
return new System.Drawing.Bitmap(ms);
}
}
[System.Runtime.InteropServices.DllImport("Gdi32.dll")]
private static extern bool DeleteObject(System.IntPtr hObject);
}
}