/// <summary>
/// 壓縮圖片
/// </summary>
/// <param name="imageFile"></param>
/// <param name="targetSize"></param>
/// <returns></returns>
public override void ResizeImageFile(byte[] imageFile, int targetSizeWidth, int targetSizeHeight, bool sameRatio, PlatformTask action)
{
byte[] pic = null;
try
{
using (System.Drawing.Image oldImage = System.Drawing.Image.FromStream(new MemoryStream(imageFile)))
{
Size newSize;
if (sameRatio)
{
float scale = GameTools.AutoSetScale(oldImage.Width, oldImage.Height, targetSizeWidth, targetSizeHeight);
newSize = new Size(Convert.ToInt32(oldImage.Width * scale), Convert.ToInt32(oldImage.Height * scale));
}
else
{
newSize = new Size(Convert.ToInt32(targetSizeWidth), Convert.ToInt32(targetSizeHeight));
}
using (Bitmap newImage = new Bitmap(newSize.Width, newSize.Height, PixelFormat.Format24bppRgb))
{
using (Graphics canvas = Graphics.FromImage(newImage))
{
canvas.SmoothingMode = SmoothingMode.AntiAlias;
canvas.InterpolationMode = InterpolationMode.HighQualityBicubic;
canvas.PixelOffsetMode = PixelOffsetMode.HighQuality;
canvas.DrawImage(oldImage, new RectangleF(new PointF(0, 0), newSize));
MemoryStream m = new MemoryStream();
newImage.Save(m, ImageFormat.Jpeg);
pic = m.GetBuffer();
}
}
}
}
catch (Exception ex)
{
WebTools.TakeWarnMsg("缩放图像失败:" + ex.Message.NullToString(), "ResizeImageFile", ex);
}
if (action != null)
{
action.ParamArrayResultBytes = pic;
action.Start();
}
}
