public BitmapPixelData LockBitmapPixelData(BitmapLockMode lockMode, PixelFormat pixelFormat)
{
var bitmapData = _bitmap.LockBits(new Rectangle(0, 0, _bitmap.Width, _bitmap.Height),
lockMode.ToGidImageLockMode(),
pixelFormat.ToGdiPixelFormat());
return(new GdiBitmapPixelData(bitmapData, lockMode));
}
public GdiBitmapPixelData(System.Drawing.Imaging.BitmapData bitmapData, BitmapLockMode lockMode)
: base(lockMode)
{
_bitmapData = bitmapData;
this.PixelFormat = bitmapData.PixelFormat.ToPixelFormat();
this.Reserved = bitmapData.Reserved;
this.Stride = bitmapData.Stride;
this.Scan0 = bitmapData.Scan0;
this.Width = bitmapData.Width;
this.Height = bitmapData.Height;
}
static public System.Drawing.Imaging.ImageLockMode ToGidImageLockMode(this BitmapLockMode mode)
{
switch (mode)
{
case BitmapLockMode.ReadWrite:
return(System.Drawing.Imaging.ImageLockMode.ReadWrite);
case BitmapLockMode.WriteOnly:
return(System.Drawing.Imaging.ImageLockMode.WriteOnly);
default:
return(System.Drawing.Imaging.ImageLockMode.ReadOnly);
}
}
public BitmapPixelData LockBitmapPixelData(BitmapLockMode lockMode, PixelFormat pixelFormat)
{
if (_bitmap != null)
{
var pixelData = new SkiaBitmapPixelData(lockMode)
{
Width = _bitmap.Width,
Height = _bitmap.Height,
Stride = _bitmap.RowBytes,
PixelFormat = pixelFormat
};
if (lockMode == BitmapLockMode.Copy)
{
pixelData.FreeMemory = true;
pixelData.Scan0 = Marshal.AllocHGlobal(_bitmap.ByteCount);
Marshal.Copy(_bitmap.Bytes, 0, pixelData.Scan0, _bitmap.ByteCount);
}
else if (pixelFormat == PixelFormat.Rgb24)
{
pixelData.FreeMemory = true;
pixelData.Scan0 = Marshal.AllocHGlobal(_bitmap.RowBytes / 4 * _bitmap.Height * 3);
pixelData.Stride = _bitmap.RowBytes / 4 * 3;
if (lockMode == BitmapLockMode.ReadOnly || lockMode == BitmapLockMode.ReadWrite)
{
pixelData.ReadFromArgb(_bitmap.GetPixels());
}
}
else
{
pixelData.Scan0 = _bitmap.GetPixels();
}
return(pixelData);
}
return(null);
}
public SkiaBitmapPixelData(BitmapLockMode lockMode)
: base(lockMode)
{
FreeMemory = false;
}
public BitmapPixelData(BitmapLockMode lockMode)
{
LockMode = lockMode;
}
