|
private GetBestMatch ( IList |
||
| frames | IList |
|
| width | int | |
| height | int | |
| Результат | System.Windows.Media.Imaging.BitmapFrame | |
public static IntPtr GenerateHICON(ImageSource image, Size dimensions)
{
if (image == null)
{
return(IntPtr.Zero);
}
BitmapFrame bitmapFrame = image as BitmapFrame;
if (bitmapFrame != null)
{
bitmapFrame = Utility.GetBestMatch(bitmapFrame.Decoder.Frames, (int)dimensions.Width, (int)dimensions.Height);
}
else
{
Rect rectangle = new Rect(0.0, 0.0, dimensions.Width, dimensions.Height);
double num = dimensions.Width / dimensions.Height;
double num2 = image.Width / image.Height;
if (image.Width <= dimensions.Width && image.Height <= dimensions.Height)
{
rectangle = new Rect((dimensions.Width - image.Width) / 2.0, (dimensions.Height - image.Height) / 2.0, image.Width, image.Height);
}
else if (num > num2)
{
double num3 = image.Width / image.Height * dimensions.Width;
rectangle = new Rect((dimensions.Width - num3) / 2.0, 0.0, num3, dimensions.Height);
}
else if (num < num2)
{
double num4 = image.Height / image.Width * dimensions.Height;
rectangle = new Rect(0.0, (dimensions.Height - num4) / 2.0, dimensions.Width, num4);
}
DrawingVisual drawingVisual = new DrawingVisual();
DrawingContext drawingContext = drawingVisual.RenderOpen();
drawingContext.DrawImage(image, rectangle);
drawingContext.Close();
RenderTargetBitmap renderTargetBitmap = new RenderTargetBitmap((int)dimensions.Width, (int)dimensions.Height, 96.0, 96.0, PixelFormats.Pbgra32);
renderTargetBitmap.Render(drawingVisual);
bitmapFrame = BitmapFrame.Create(renderTargetBitmap);
}
IntPtr result;
using (MemoryStream memoryStream = new MemoryStream())
{
new PngBitmapEncoder
{
Frames =
{
bitmapFrame
}
}.Save(memoryStream);
using (ManagedIStream managedIStream = new ManagedIStream(memoryStream))
{
IntPtr zero = IntPtr.Zero;
try
{
Status status = NativeMethods.GdipCreateBitmapFromStream(managedIStream, out zero);
if (status != Status.Ok)
{
result = IntPtr.Zero;
}
else
{
IntPtr intPtr;
status = NativeMethods.GdipCreateHICONFromBitmap(zero, out intPtr);
if (status != Status.Ok)
{
result = IntPtr.Zero;
}
else
{
result = intPtr;
}
}
}
finally
{
Utility.SafeDisposeImage(ref zero);
}
}
}
return(result);
}
public static IntPtr GenerateHICON(ImageSource image, Size dimensions)
{
IntPtr intPtr;
IntPtr zero;
if (image == null)
{
return(IntPtr.Zero);
}
BitmapFrame bestMatch = image as BitmapFrame;
if (bestMatch == null)
{
Rect rect = new Rect(0, 0, dimensions.Width, dimensions.Height);
double width = dimensions.Width / dimensions.Height;
double num = image.Width / image.Height;
if (image.Width <= dimensions.Width && image.Height <= dimensions.Height)
{
rect = new Rect((dimensions.Width - image.Width) / 2, (dimensions.Height - image.Height) / 2, image.Width, image.Height);
}
else if (width > num)
{
double width1 = image.Width / image.Height * dimensions.Width;
rect = new Rect((dimensions.Width - width1) / 2, 0, width1, dimensions.Height);
}
else if (width < num)
{
double height = image.Height / image.Width * dimensions.Height;
rect = new Rect(0, (dimensions.Height - height) / 2, dimensions.Width, height);
}
DrawingVisual drawingVisual = new DrawingVisual();
DrawingContext drawingContext = drawingVisual.RenderOpen();
drawingContext.DrawImage(image, rect);
drawingContext.Close();
RenderTargetBitmap renderTargetBitmap = new RenderTargetBitmap((int)dimensions.Width, (int)dimensions.Height, 96, 96, PixelFormats.Pbgra32);
renderTargetBitmap.Render(drawingVisual);
bestMatch = BitmapFrame.Create(renderTargetBitmap);
}
else
{
bestMatch = Utility.GetBestMatch(bestMatch.Decoder.Frames, (int)dimensions.Width, (int)dimensions.Height);
}
using (MemoryStream memoryStream = new MemoryStream())
{
BitmapEncoder pngBitmapEncoder = new PngBitmapEncoder();
pngBitmapEncoder.Frames.Add(bestMatch);
pngBitmapEncoder.Save(memoryStream);
using (ManagedIStream managedIStream = new ManagedIStream(memoryStream))
{
IntPtr zero1 = IntPtr.Zero;
try
{
if (Standard.NativeMethods.GdipCreateBitmapFromStream(managedIStream, out zero1) == Status.Ok)
{
zero = (Standard.NativeMethods.GdipCreateHICONFromBitmap(zero1, out intPtr) == Status.Ok ? intPtr : IntPtr.Zero);
}
else
{
zero = IntPtr.Zero;
}
}
finally
{
Utility.SafeDisposeImage(ref zero1);
}
}
}
return(zero);
}