/// <summary>
/// 创建缩略图，并且格式化
/// </summary>
/// <param name="abPath"></param>
/// <param name="width"></param>
/// <param name="height"></param>
/// <param name="mode"></param>
/// <param name="format"></param>
/// <param name="stream">水印流</param>
/// <returns></returns>
public static SKData MakeThumb(string abPath, int width, int height, CroppingMode mode, SKEncodedImageFormat format, Stream stream)
{
using (var input = File.OpenRead(abPath))
{
SKBitmap bitmap = null;
SKCanvas canvas = null;
if (mode == CroppingMode.NONE)
{
bitmap = SKBitmap.Decode(input);
canvas = new SKCanvas(bitmap);
}
else
{
var source = SKBitmap.Decode(input);
var cropRect = new CroppingRectangle(source, width, height, mode);
bitmap = new SKBitmap((int)cropRect.Dest.Width, (int)cropRect.Dest.Height);
canvas = new SKCanvas(bitmap);
canvas.DrawBitmap(source, cropRect.Rect, cropRect.Dest);
}
if (stream != null)
{
DrawMark(canvas, bitmap.Width, bitmap.Height, stream);
}
SKData data = SKImage.FromBitmap(bitmap).Encode(format, QUALITY);
canvas.Dispose();
bitmap.Dispose();
return(data);
}
}
/// <summary>
/// 创建缩略图，未格式化
/// </summary>
/// <param name="abPath"></param>
/// <param name="width"></param>
/// <param name="height"></param>
/// <param name="mode"></param>
/// <returns></returns>
public static SKBitmap MakeThumb(string abPath, int width, int height, CroppingMode mode)
{
using (var input = System.IO.File.OpenRead(abPath))
{
if (mode == CroppingMode.NONE)
{
return(SKBitmap.Decode(input));
}
using (var inputStream = new SKManagedStream(input))
{
using (var bitmap = SKBitmap.Decode(inputStream))
{
var cropRect = new CroppingRectangle(bitmap, width, height, mode);
SKBitmap croppedBitmap = new SKBitmap((int)cropRect.Dest.Width, (int)cropRect.Dest.Height);
using (SKCanvas canvas = new SKCanvas(croppedBitmap))
{
canvas.DrawBitmap(bitmap, cropRect.Rect, cropRect.Dest);
}
return(croppedBitmap);
}
}
}
}