private Point ResizeMaxWidth(Bitmap image, Photo_Setting myPhoto_Setting)
{
Point myPoint = new Point(myPhoto_Setting.Resize_Width, image.Height);
if (image.Width > myPhoto_Setting.Resize_Width)
{
Single ratio = myPhoto_Setting.Resize_Width / Convert.ToSingle(image.Width);
myPoint.X = Convert.ToInt32(image.Width * ratio);
myPoint.Y = Convert.ToInt32(image.Height * ratio);
}
return(myPoint);
}
private Point ResizeMinHeightMinWidth(Bitmap image, Photo_Setting myPhoto_Setting)
{
Point myPoint = new Point(myPhoto_Setting.Resize_Width, myPhoto_Setting.Resize_Height);
if (image.Height < myPhoto_Setting.Resize_Height)
{
Single ratio = myPhoto_Setting.Resize_Height / Convert.ToSingle(image.Height);
myPoint.X = Convert.ToInt32(image.Width * ratio);
myPoint.Y = Convert.ToInt32(image.Height * ratio);
}
if (myPoint.X < myPhoto_Setting.Resize_Width)
{
Single ratio = myPhoto_Setting.Resize_Width / Convert.ToSingle(myPoint.X);
myPoint.X = Convert.ToInt32(myPoint.X * ratio);
myPoint.Y = Convert.ToInt32(myPoint.Y * ratio);
}
return(myPoint);
}
private Point OverlayBottomRight(Bitmap image, Bitmap overlay_image, Photo_Setting myPhoto_Setting)
{
return(new Point(image.Size.Width - overlay_image.Size.Width - myPhoto_Setting.Overlay_PaddingX,
image.Size.Height - overlay_image.Height - myPhoto_Setting.Overlay_PaddingY));
}
private Point OverlayCenter(Bitmap image, Bitmap overlay_image, Photo_Setting myPhoto_Setting)
{
return(new Point(image.Size.Width / 2 - overlay_image.Size.Width / 2 + myPhoto_Setting.Overlay_PaddingX,
image.Size.Height / 2 - overlay_image.Size.Height / 2 + myPhoto_Setting.Overlay_PaddingY));
}
private Point OverlayTopLeft(Bitmap image, Bitmap overlay_image, Photo_Setting myPhoto_Setting)
{
return(new Point(myPhoto_Setting.Overlay_PaddingX, myPhoto_Setting.Overlay_PaddingY));
}
private Point ResizeFixed(Bitmap image, Photo_Setting myPhoto_Setting)
{
return(new Point(myPhoto_Setting.Resize_Width, myPhoto_Setting.Resize_Height));
}
public void InitImg(HttpContext context, string DisplayID, string PhotoID)
{
Photo myPhoto = Get_Photo(PhotoID);
Photo_Setting myPhoto_Setting = Get_Photo_Setting(DisplayID);
Bitmap bitMapImage;
// 检测文件是否存在
if (myPhoto.ImageURL_Type == ImageURL_Type.Internal)
{
// 本地文件
if (File.Exists(context.Server.MapPath(myPhoto.ImageURL)))
{
bitMapImage = new Bitmap(context.Server.MapPath(myPhoto.ImageURL));
}
else
{
bitMapImage = new Bitmap(context.Server.MapPath(myPhoto_Setting.Image_BrokenURL));
}
}
else
{
// 远程文件
try
{
bitMapImage = ImgLib.GetBitmapFromUri(myPhoto.ImageURL);
}
catch
{
bitMapImage = new Bitmap(context.Server.MapPath(myPhoto_Setting.Image_BrokenURL));
}
}
// Photo Setting
if (myPhoto_Setting.IsResize)
{
Point resizePoint = new Point();
switch (myPhoto_Setting.Resize_Type)
{
case Resize_Type.Fixed:
resizePoint = ResizeFixed(bitMapImage, myPhoto_Setting);
break;
case Resize_Type.MinHeight:
resizePoint = ResizeMinHeight(bitMapImage, myPhoto_Setting);
break;
case Resize_Type.MinWidth:
resizePoint = ResizeMinWidth(bitMapImage, myPhoto_Setting);
break;
case Resize_Type.MinHeight_and_MinWidth:
resizePoint = ResizeMinHeightMinWidth(bitMapImage, myPhoto_Setting);
break;
case Resize_Type.MaxHeight:
resizePoint = ResizeMaxHeight(bitMapImage, myPhoto_Setting);
break;
case Resize_Type.MaxWidth:
resizePoint = ResizeMaxWidth(bitMapImage, myPhoto_Setting);
break;
case Resize_Type.MaxHeight_and_MaxWidth:
resizePoint = ResizeMaxHeightMaxWidth(bitMapImage, myPhoto_Setting);
break;
}
bitMapImage = ImgLib.ResizeBitmap(bitMapImage, resizePoint.X, resizePoint.Y);
}
if (myPhoto_Setting.IsOverlay)
{
Bitmap overlayBitmap = new Bitmap(context.Server.MapPath(myPhoto_Setting.Overlay_ImageURL));
Point overlayPoint = new Point();
switch (myPhoto_Setting.Overlay_Position)
{
case Overlay_Position.TopLeft:
overlayPoint = OverlayTopLeft(bitMapImage, overlayBitmap, myPhoto_Setting);
break;
case Overlay_Position.TopRight:
overlayPoint = OverlayTopRight(bitMapImage, overlayBitmap, myPhoto_Setting);
break;
case Overlay_Position.Center:
overlayPoint = OverlayCenter(bitMapImage, overlayBitmap, myPhoto_Setting);
break;
case Overlay_Position.BottomLeft:
overlayPoint = OverlayBottomLeft(bitMapImage, overlayBitmap, myPhoto_Setting);
break;
case Overlay_Position.BottomRight:
overlayPoint = OverlayBottomRight(bitMapImage, overlayBitmap, myPhoto_Setting);
break;
}
bitMapImage = ImgLib.OverlayBitmap(bitMapImage, overlayBitmap, myPhoto_Setting.Overlay_Opacity, overlayPoint);
}
ShowImg(context, bitMapImage);
}