namespace Publics
{
public class ImgHelper
{
public static void AdjustPhoto(int toWidth, int toHeight, string filePath, string fromFileName, string toFileName, int maxWidth, int maxHeight)
{
Image originalImage = Image.FromFile(filePath + "/" + fromFileName);
//如果尺寸不够返回保存原图
if (originalImage.Width < toWidth && originalImage.Height < toHeight)
{
originalImage.Save(filePath + "/" + toFileName);
originalImage.Dispose();
return;
}
//根据图片大小获取新图片从原图片截取的区域
int x, y, w, h;
if (toHeight > 0)
{
if (toWidth > 0)
{
if (originalImage.Width > toWidth && originalImage.Height > toHeight)
{
w = toWidth;
h = toWidth * originalImage.Height / originalImage.Width;
if (h > toHeight)
{
h = toHeight;
w = toHeight * originalImage.Width / originalImage.Height;
x = (toWidth - w) / 2;
y = 0;
}
else
{
x = 0;
y = (toHeight - h) / 2;
}
}
else if (originalImage.Width > toWidth)
{
w = toWidth;
h = toWidth * originalImage.Height / originalImage.Width;
x = 0;
y = (toHeight - h) / 2;
}
else if (originalImage.Height > toHeight)
{
h = toHeight;
w = toHeight * originalImage.Width / originalImage.Height;
x = (toWidth - w) / 2;
y = 0;
}
else
{
w = originalImage.Width;
h = originalImage.Height;
x = (toWidth - w) / 2;
y = (toHeight - h) / 2;
&