public static BitmapSource ConvertCore(BitmapSource image, Color biasColor)
{
if (image == null)
{
return(null);
}
BitmapSource bitmapSource;
if (image.Format == PixelFormats.Bgra32 && image.PixelWidth <= 128 && image.PixelHeight <= 128)
{
bitmapSource = ConvertToGrayScale(image, biasColor);
}
else
{
if (biasColor.R != byte.MaxValue || biasColor.G != byte.MaxValue || biasColor.B != byte.MaxValue)
{
throw new NotSupportedException();
}
FormatConvertedBitmap formatConvertedBitmap = new FormatConvertedBitmap();
formatConvertedBitmap.BeginInit();
formatConvertedBitmap.DestinationFormat = PixelFormats.Gray32Float;
formatConvertedBitmap.Source = image;
formatConvertedBitmap.EndInit();
if (formatConvertedBitmap.CanFreeze)
{
formatConvertedBitmap.Freeze();
}
bitmapSource = formatConvertedBitmap;
}
return(bitmapSource);
}
/// <summary>
/// 从图片中获取背景颜色
/// </summary>
/// <param name="bitmap">图片</param>
public static Color GetImageColorForBackground(FormatConvertedBitmap bitmap)
{
const int bytesPerPixel = 3;
if (bitmap.CanFreeze)
{
bitmap.Freeze();
}
var pixels = new byte[bitmap.PixelHeight * bitmap.PixelWidth * bytesPerPixel];
bitmap.CopyPixels(pixels, bitmap.PixelWidth * bytesPerPixel, 0);
var width = bitmap.PixelWidth;
var height = bitmap.PixelHeight;
//计算颜色的均值
Color color = GetColorOfRegion(pixels, width, height, 0, width, 0, height);
var hsl = new HslColor(color);
if (IsNotSaturateEnough(hsl) && !IsAlmostZeroSaturation(hsl))
{
hsl.Saturation += 0.2;
}
return(Revise(hsl).ToRgb());
}
private static FormatConvertedBitmap ConvertToGrayscale(BitmapImage image)
{
var grayBitmapSource = new FormatConvertedBitmap();
grayBitmapSource.BeginInit();
grayBitmapSource.Source = image;
grayBitmapSource.DestinationFormat = PixelFormats.Gray32Float;
grayBitmapSource.EndInit();
grayBitmapSource.Freeze();
return(grayBitmapSource);
}
private static BitmapSource _ToFormat(BitmapSource source, PixelFormat format)
{
var bitmap = new FormatConvertedBitmap();
bitmap.BeginInit();
bitmap.DestinationFormat = format;
bitmap.Source = source;
bitmap.EndInit();
bitmap.Freeze();
return(bitmap);
}
public static Bitmap ToGdiBitmap(BitmapSource bmp)
{
// below code refernces blog entry by luche:
// http://www.ruche-home.net/%A4%DC%A4%E4%A4%AD%A4%B4%A4%C8/2011-08-02/CopyPixels%20%A5%E1%A5%BD%A5%C3%A5%C9%A4%F2%CD%D1%A4%A4%A4%BF%20WPF%20BitmapSource%20%A4%AB%A4%E9%20GDI%20Bitmap%20%A4%D8%A4%CE%CA%D1%B4%B9
if (bmp.Format != PixelFormats.Bgra32)
{
// convert format
bmp = new FormatConvertedBitmap(bmp,
PixelFormats.Bgra32, null, 0);
bmp.Freeze();
}
// prepare values
var width = (int)bmp.Width;
var height = (int)bmp.Height;
var stride = width * 4;
// prepare buffer
var buffer = new byte[stride * height];
// copy to byte array
bmp.CopyPixels(buffer, stride, 0);
// create bitmap
var result = new Bitmap(width, height, SDI::PixelFormat.Format32bppArgb);
// set bitmap content
try
{
// locking bits
SDI::BitmapData bd = null;
try
{
bd = result.LockBits(new Rectangle(0, 0, width, height),
SDI::ImageLockMode.WriteOnly, SDI::PixelFormat.Format32bppArgb);
Marshal.Copy(buffer, 0, bd.Scan0, buffer.Length);
}
finally
{
if (bd != null)
{
result.UnlockBits(bd);
}
}
}
catch
{
result.Dispose();
throw;
}
return(result);
}
private static BitmapSource Convert(BitmapSource source)
{
FormatConvertedBitmap bitmap = new FormatConvertedBitmap();
bitmap.BeginInit();
bitmap.Source = source;
bitmap.DestinationFormat = PixelFormats.Gray8;
bitmap.EndInit();
bitmap.Freeze();
return(bitmap);
}
public static BitmapSource Convert16BppTo8BppSource(BitmapSource source)
{
FormatConvertedBitmap s = new FormatConvertedBitmap();
s.BeginInit();
s.Source = source;
s.DestinationFormat = System.Windows.Media.PixelFormats.Gray8;
s.EndInit();
s.Freeze();
return(s);
}
public void InitializeFromVectorGraphics(VisualBrush visualBrush, double width, double height) //, Boolean grey)
{
RenderTargetBitmap renderTargetImage = CreateFromVectorGraphics(visualBrush, width, height);
CachedFormatConvertedBitmap = new FormatConvertedBitmap(renderTargetImage, PixelFormats.Gray32Float, null, 0);
CachedFormatConvertedBitmap.Freeze();
CachedOpacityMask = new ImageBrush(renderTargetImage);
CachedOpacityMask.Opacity = 0.4;
CachedOpacityMask.Freeze();
SetGrey(!IsEnabled);
}
private static async Task <byte[]> ToBytesAsync(this BitmapSource bitmap)
{
if (bitmap.Format.BitsPerPixel != 32)
{
bitmap = new FormatConvertedBitmap(bitmap, PixelFormats.Bgra32, null, 0.0);
bitmap.Freeze();
}
int stride = bitmap.GetStride();
byte[] bytes = new byte[stride * bitmap.PixelHeight];
await Task.Run(delegate
{
bitmap.CopyPixels(bytes, stride, 0);
});
return(bytes);
}
public static BitmapSource GetClipboardImage(bool containsAlpha = false)
{
BitmapSource bitmapSource = null;
if (Clipboard.ContainsImage())
{
bitmapSource = Clipboard.GetImage();
}
else if (Clipboard.ContainsFileDropList())
{
var fileDropList = Clipboard.GetFileDropList();
if (fileDropList.Count <= 0)
{
return(null);
}
bitmapSource = GetImageFromFile(fileDropList [0]);
}
else if (Clipboard.ContainsText())
{
string text = Clipboard.GetText();
if (!File.Exists(text))
{
return(null);
}
bitmapSource = GetImageFromFile(text);
}
else
{
return(null);
}
if (bitmapSource == null)
{
return(null);
}
bitmapSource = new FormatConvertedBitmap(bitmapSource,
containsAlpha
? System.Windows.Media.PixelFormats.Bgra32
: System.Windows.Media.PixelFormats.Bgr24, null, 0);
bitmapSource.Freeze();
return(bitmapSource);
}
/// キャプチャしたHBitmapをBitmapSource(Freezed)にして返す
/// @param request スクリーンキャプチャ設定をまとめたリクエスト
/// @return スクリーンキャプチャ結果が格納されたBitmapSource
private BitmapSource Capture(ScreenCaptureRequest request)
{
if (request.ClippingWidth <= 0 || request.ClippingHeight <= 0)
{
// Debug.WriteLine("Invalid clipping size", "ScreenCaptureTimer.CaptureByGetDIBits");
return(null);
}
// HBitmapからBitmapSourceを作成
BitmapSource bitmap = null;
using (var result = request.Execute()) {
if (result == null)
{
return(bitmap);
}
// HBitmapからBitmapSourceに変換
bitmap = Imaging.CreateBitmapSourceFromHBitmap(
result.Bitmap, IntPtr.Zero, Int32Rect.Empty,
BitmapSizeOptions.FromEmptyOptions());
// Debug.WriteLine(string.Format("Captured: {0:D}x{1:D}",
// bitmap.PixelWidth, bitmap.PixelHeight),
// "ScreenCapture");
}
// Alphaチャンネル情報を削除
bitmap = new FormatConvertedBitmap(bitmap, PixelFormats.Bgr32, null, 0.0);
/// @todo(me) あまり大きな画像をメモリにおいておきたくない。
/// とはいえ、TransformedBitmapはちょっと重過ぎる。
/// メモリよりもCPUリソースを残しておきたいのでこのままでいいかも。
//bitmap = this.Resize(bitmap);
// スレッド越しにアクセスされるためFreeze
bitmap.Freeze();
return(bitmap);
}
public void PaintAnimationGIF(LocalDecoder decoder)
{
frameCount = decoder.Frames.Count;
framePos = 0;
bitmapFrames = decoder.Frames;
bmp = decoder.Frames[0];
int width = (int)Image.MinWidth;
int height = (int)Image.MinHeight;
int imgWidth = bmp.PixelWidth;
int imgHeight = bmp.PixelHeight;
ObjectAnimationUsingKeyFrames animation = new ObjectAnimationUsingKeyFrames();
LogWriter.write("This File is Animation GIF.");
isAnimation = true;
long time = 0;
long span = 1000 * 10;
byte[] imgBuffer = new byte[imgWidth * imgHeight];
WriteableBitmap wbmp = new WriteableBitmap(imgWidth, imgHeight, bmp.DpiX, bmp.DpiY, PixelFormats.Indexed8, bmp.Palette);
GetScaleValue v = GetScale(imgWidth, imgHeight, width, height, bmp.DpiX, bmp.DpiY);
scaleX = v.scaleX;
scaleY = v.scaleY;
int resizeWidth = v.resizeWidth;
int resizeHeight = v.resizeHight;
if (bmp.Format != PixelFormats.Indexed8)
{
bmp = new FormatConvertedBitmap(bmp, PixelFormats.Indexed8, null, 0);
bmp.Freeze();
}
offsetX = (width - resizeWidth) / 2.0;
offsetY = (height - resizeHeight) / 2.0;
TransformGroup transforms = new TransformGroup();
transforms.Children.Add(new ScaleTransform(scaleX, scaleY));
Matrix matrix = new Matrix(1, 0, 0, 1, offsetX, offsetY);
transforms.Children.Add(new MatrixTransform(matrix));
Image.RenderTransform = transforms;
Image.Source = bmp;
byte[] buf = new byte[imgWidth * imgHeight];
bmp.CopyPixels(buf, imgWidth, 0);
wbmp.WritePixels(new Int32Rect(0, 0, imgWidth, imgHeight), buf, imgWidth, 0);
for (int i = 0; i < frameCount; i++)
{
BitmapSource fbmp = bitmapFrames[i];
int transpearentColor = 0;
BitmapMetadata metadata = fbmp.Metadata as BitmapMetadata;
bool transpearent = false, hasLocalPalette = false;
int delay = 0, startX = 0, startY = 0, w = imgWidth, h = imgHeight;
BitmapPalette palette = bmp.Palette;
if (metadata != null)
{
try
{
startX = (UInt16)metadata.GetQuery("/imgdesc/Left");
startY = (UInt16)metadata.GetQuery("/imgdesc/Top");
w = (UInt16)metadata.GetQuery("/imgdesc/Width");
h = (UInt16)metadata.GetQuery("/imgdesc/Height");
delay = (UInt16)metadata.GetQuery("/grctlext/Delay") * 10;
transpearent = (Boolean)metadata.GetQuery("/grctlext/TransparencyFlag");
if (transpearent)
{
transpearentColor = (Byte)metadata.GetQuery("/grctlext/TransparentColorIndex");
}
hasLocalPalette = (Boolean)metadata.GetQuery("/imgdesc/LocalColorTableFlag");
if (hasLocalPalette)
{
int size = (byte)metadata.GetQuery("/imgdesc/LocalColorTableSize");
palette = fbmp.Palette;
}
}
catch
{
LogWriter.write("Query Error");
//no data
}
}
if (fbmp.Format != PixelFormats.Indexed8)
{
fbmp = new FormatConvertedBitmap(fbmp, PixelFormats.Indexed8, null, 0);
fbmp.Freeze();
}
byte[] fbuf = new byte[w * h];
fbmp.CopyPixels(fbuf, w, 0);
if (transpearent)
{
for (int y = 0; y < h; y++)
{
int srcOffset = y * w;
int destOffset = (startY + y) * imgWidth + startX;
for (int x = 0; x < w; x++)
{
if (transpearentColor != fbuf[srcOffset + x])
{
buf[destOffset + x] = fbuf[srcOffset + x];
}
}
}
}
else
{
for (int y = 0; y < h; y++)
{
int srcOffset = y * w;
int destOffset = (y + startY) * imgWidth + startX;
Array.Copy(fbuf, srcOffset, buf, destOffset, w);
}
}
WriteableBitmap wfbmp = new WriteableBitmap(imgWidth, imgHeight, bmp.DpiX, bmp.DpiY, PixelFormats.Indexed8, palette);
wfbmp.WritePixels(new Int32Rect(0, 0, imgWidth, imgHeight), buf, imgWidth, 0);
DiscreteObjectKeyFrame key = new DiscreteObjectKeyFrame();
key.KeyTime = new TimeSpan(time);
// key.Value = bitmapFrames[i];
key.Value = wfbmp;
animation.KeyFrames.Add(key);
time += delay * span;
}
animation.RepeatBehavior = RepeatBehavior.Forever;
animation.Duration = new TimeSpan(time);
Image.RenderTransform = transforms;
Image.BeginAnimation(Image.SourceProperty, animation);
Image.Source = bmp;
}
/// <inheritdoc />
protected override string HashImageStream(Stream s, int size)
{
s.Seek(0, SeekOrigin.Begin);
//Create an image with a small size
var bmi = new BitmapImage
{
CreateOptions = BitmapCreateOptions.DelayCreation | BitmapCreateOptions.IgnoreColorProfile,
};
bmi.BeginInit();
bmi.StreamSource = s;
bmi.DecodePixelWidth = size;
bmi.DecodePixelHeight = size;
bmi.EndInit();
bmi.Freeze();
//Convert the image format to argb32bpp so the pixel size will always be 4
var fcbm = new FormatConvertedBitmap();
fcbm.BeginInit();
fcbm.Source = bmi;
fcbm.DestinationFormat = PixelFormats.Bgra32;
fcbm.EndInit();
fcbm.Freeze();
//Copy the image's data to a new array
//Mostly gotten from here https://social.msdn.microsoft.com/Forums/vstudio/en-US/82a5731e-e201-4aaf-8d4b-062b138338fe/getting-pixel-information-from-a-bitmapimage?forum=wpf
var pixelSize = PixelFormats.Bgra32.BitsPerPixel / 8;
var stride = fcbm.PixelWidth * pixelSize;
var bytes = new byte[fcbm.PixelHeight * stride];
fcbm.CopyPixels(bytes, stride, 0);
var brightnesses = new float[fcbm.PixelHeight * fcbm.PixelWidth];
var currentPixel = 0;
switch (pixelSize)
{
case 4: //RGBA
for (int y = 0; y < fcbm.PixelHeight; ++y)
{
for (int x = 0; x < fcbm.PixelWidth; ++x)
{
var index = y * stride + x * pixelSize;
var r = bytes[index];
var g = bytes[index + 1];
var b = bytes[index + 2];
var a = bytes[index + 3];
brightnesses[currentPixel] = CalculateBrightness(a, r, g, b);
++currentPixel; //Could do currentPixel++ above, but that's less clear
}
}
break;
case 3: //RGB
for (int y = 0; y < fcbm.PixelHeight; ++y)
{
for (int x = 0; x < fcbm.PixelWidth; ++x)
{
var index = y * stride + x * pixelSize;
var r = bytes[index];
var g = bytes[index + 1];
var b = bytes[index + 2];
brightnesses[currentPixel] = CalculateBrightness(255, r, g, b);
++currentPixel;
}
}
break;
default:
throw new NotSupportedException("The default implementation of this method only supports 32 and 24 bit pixels.");
}
return(BrightnessesToString(brightnesses));
}
