protected void SetWallpaper(Image wall, WallpaperMode mode, int percentTopBottomCutAllowed, int percentLeftRightCutAllowed)
{
bool CanBeSnapped(int width, int height)
{
var minRatio = TargetArea.Size.ToMinRatio(percentTopBottomCutAllowed);
var maxRatio = TargetArea.Size.ToMaxRatio(percentLeftRightCutAllowed);
var imageRatio = 1.0 * width / height;
return(imageRatio <= maxRatio && imageRatio >= minRatio);
}
if (wall == null)
{
throw new NullReferenceException("Wallpaper can´t be null");
}
switch (mode)
{
case WallpaperMode.AllowFill:
{
if (CanBeSnapped(wall.Width, wall.Height))
{
SetSnappedWallpaper(wall);
}
else
{
SetPicture(wall);
}
break;
}
case WallpaperMode.AllowFillForceCut:
{
if (CanBeSnapped(wall.Width, wall.Height))
{
SetSnappedWallpaper(wall);
}
else
{
SetCutWallpaper(wall, percentTopBottomCutAllowed, percentLeftRightCutAllowed);
}
break;
}
case WallpaperMode.Fit:
{
SetPicture(wall);
break;
}
case WallpaperMode.Fill:
{
SetSnappedWallpaper(wall);
break;
}
default:
throw new NotImplementedException();
}
}
public static MemoryStream ResizePicture(
Stream stream,
int targetWidth,
int targetHeight,
WallpaperMode mode = WallpaperMode.AllowFillForceCut,
ImageFormat format = null,
Color?background = null)
{
var pip = new PictureInPicture(new Rectangle(0, 0, targetWidth, targetHeight));
pip.SetWallpaper(Image.FromStream(stream), mode, 11, 25);
var image = new Bitmap(targetWidth, targetHeight);
var graphic = Graphics.FromImage(image);
graphic.InterpolationMode = InterpolationMode.HighQualityBicubic;
graphic.SmoothingMode = SmoothingMode.HighQuality;
graphic.PixelOffsetMode = PixelOffsetMode.HighQuality;
graphic.CompositingQuality = CompositingQuality.HighQuality;
graphic.Clear(background ?? Color.Black);
pip.DrawToGraphics(graphic);
var ms = new MemoryStream();
image.Save(ms, format ?? ImageFormat.Jpeg);
return(ms);
}
internal void SetWallpaper(Image wall, WallpaperMode mode, int percentTopBottomCutAllowed, int percentLeftRightCutAllowed)
{
bool CanBeSnapped(int width, int height)
{
var minRatio = TargetArea.Size.ToMinRatio(percentTopBottomCutAllowed);
var maxRatio = TargetArea.Size.ToMaxRatio(percentLeftRightCutAllowed);
var imageRatio = 1.0 * width / height;
return(imageRatio <= maxRatio && imageRatio >= minRatio);
}
Timestamp = DateTimeOffset.Now;
CurrentOriginal = wall ?? throw new NullReferenceException("Wallpaper can´t be null");
switch (mode)
{
case WallpaperMode.AllowFill:
{
if (CanBeSnapped(wall.Width, wall.Height))
{
SetSnappedWallpaper(wall);
}
else
{
SetPicture(wall);
}
break;
}
case WallpaperMode.AllowFillForceCut:
{
if (CanBeSnapped(wall.Width, wall.Height))
{
SetSnappedWallpaper(wall);
}
else
{
SetCutWallpaper(wall, percentTopBottomCutAllowed, percentLeftRightCutAllowed);
}
break;
}
case WallpaperMode.Fit:
{
SetPicture(wall);
break;
}
case WallpaperMode.Fill:
{
SetSnappedWallpaper(wall);
break;
}
default:
throw new NotSupportedException("WallpaperMode not supported");
}
}
/// <summary>
/// 更新壁纸的显示模式
/// </summary>
/// <param name="wallpaperMode"></param>
public Config ModifyDisplayMode(WallpaperMode wallpaperMode)
{
WallpaperMode = wallpaperMode;
return this;
}
