public KalikoImage GetThumbnailImage(int width, int height, ThumbnailMethod method)
{
ScalingBase scaleEngine;
switch (method)
{
case ThumbnailMethod.Fit:
scaleEngine = new FitScaling(width, height);
break;
case ThumbnailMethod.Pad:
scaleEngine = new PadScaling(width, height);
break;
default:
scaleEngine = new CropScaling(width, height);
break;
}
return(Scale(scaleEngine));
}
/// <summary>
/// 缩略图的截图模式是：当原图宽高比按照缩略图时缩放
/// </summary>
/// <param name="originalImagePath"></param>
/// <param name="thumbnailPath"></param>
/// <param name="extName"></param>
/// <param name="width"></param>
/// <param name="height"></param>
/// <param name="scale">Crop:取中间部分;Fit:按比例缩放，自动调整尺寸;Pad:按比例缩放，保持尺寸，不足部分填白</param>
/// <param name="position">水印位置</param>
/// <param name="waterMarkingPath">水印图片路劲</param>
public void MakeThumbnail(string originalImagePath, string thumbnailPath, string extName, int width, int height, ThumbnailMethod scale = ThumbnailMethod.Fit, WaterMarkingPosition?position = null, string waterMarkingPath = "")
{
if (!File.Exists(originalImagePath))
{
return;
}
var image = new KalikoImage(originalImagePath)
{
BackgroundColor = Color.White
};
var format = GetImageFormat(extName);
ScalingBase scalingBase = null;
switch (scale)
{
case ThumbnailMethod.Crop:
scalingBase = new CropScaling(width, height);
break;
case ThumbnailMethod.Fit:
scalingBase = new FitScaling(width, height);
break;
case ThumbnailMethod.Pad:
scalingBase = new PadScaling(width, height);
break;
default:
scalingBase = new CropScaling(width, height);
break;
}
var imageThumb = image.Scale(scalingBase);
AddWaterMarking(position, waterMarkingPath, imageThumb);
imageThumb.SaveImage(thumbnailPath, format);
image.Dispose();
imageThumb.Dispose();
}
public KalikoImage GetThumbnailImage(int width, int height, ThumbnailMethod method) {
ScalingBase scaleEngine;
switch (method) {
case ThumbnailMethod.Fit:
scaleEngine = new FitScaling(width, height);
break;
case ThumbnailMethod.Pad:
scaleEngine = new PadScaling(width, height);
break;
default:
scaleEngine = new CropScaling(width, height);
break;
}
return Scale(scaleEngine);
}
