public static ReadOnlySpan <byte> GetScaledVersion(this KeyBitmap keyBitmap, int width, int height)
{
IKeyBitmapDataAccess keyDataAccess = keyBitmap;
if (keyDataAccess.IsEmpty)
{
// default span is of length 0 (the caller has to check this special case)
return(default);
public static byte[] GetScaledVersion(this KeyBitmap keyBitmap, int width, int height)
{
IKeyBitmapDataAccess keyDataAccess = keyBitmap;
if (keyDataAccess.IsNull)
{
return(null);
}
if (keyBitmap.Width == width && keyBitmap.Height == height)
{
return(keyDataAccess.CopyData());
}
var destRect = new Rectangle(0, 0, width, height);
using (var scaledBmp = new Bitmap(width, height, PixelFormat.Format24bppRgb))
using (var sourceBmp = keyDataAccess.GetBitmap())
{
using (var g = Graphics.FromImage(scaledBmp))
{
g.CompositingMode = CompositingMode.SourceCopy;
g.CompositingQuality = CompositingQuality.HighQuality;
g.InterpolationMode = InterpolationMode.HighQualityBicubic;
g.SmoothingMode = SmoothingMode.HighQuality;
g.PixelOffsetMode = PixelOffsetMode.HighQuality;
using (var wrapMode = new ImageAttributes())
{
wrapMode.SetWrapMode(WrapMode.TileFlipXY);
g.DrawImage(sourceBmp, destRect, 0, 0, sourceBmp.Width, sourceBmp.Height, GraphicsUnit.Pixel, wrapMode);
}
}
var bmpData = scaledBmp.LockBits(destRect, ImageLockMode.ReadOnly, PixelFormat.Format24bppRgb);
try
{
var dataArray = new byte[width * height * 3];
Marshal.Copy(bmpData.Scan0, dataArray, 0, dataArray.Length);
return(dataArray);
}
finally
{
scaledBmp.UnlockBits(bmpData);
}
}
}
public static byte[] GetScaledVersion(this KeyBitmap keyBitmap, int width, int height)
{
IKeyBitmapDataAccess keyDataAccess = keyBitmap;
if (keyDataAccess.IsNull)
{
return(null);
}
var rawData = new byte[keyDataAccess.DataLength];
keyDataAccess.CopyData(rawData, 0);
if (keyBitmap.Width == width && keyBitmap.Height == height)
{
return(rawData);
}
var destRect = new Rectangle(0, 0, width, height);
using (var scaledBmp = new Bitmap(width, height, PixelFormat.Format24bppRgb))
using (var sourceBmp = new Bitmap(keyBitmap.Width, keyBitmap.Height, PixelFormat.Format24bppRgb))
{
var bmpData = sourceBmp.LockBits(new Rectangle(0, 0, sourceBmp.Width, sourceBmp.Height), ImageLockMode.ReadWrite, PixelFormat.Format24bppRgb);
try
{
var h = sourceBmp.Height;
var w = sourceBmp.Width;
var alignedData = new byte[bmpData.Stride * h];
for (var y = 0; y < h; y++)
{
for (var x = 0; x < w; x++)
{
var ps = bmpData.Stride * y + x * 3;
var pt = (w * y + x) * 3;
alignedData[ps + 0] = rawData[pt + 0];
alignedData[ps + 1] = rawData[pt + 1];
alignedData[ps + 2] = rawData[pt + 2];
}
}
Marshal.Copy(alignedData, 0, bmpData.Scan0, rawData.Length);
}
finally
{
sourceBmp.UnlockBits(bmpData);
}
using (var g = Graphics.FromImage(scaledBmp))
{
g.CompositingMode = CompositingMode.SourceCopy;
g.CompositingQuality = CompositingQuality.HighQuality;
g.InterpolationMode = InterpolationMode.HighQualityBicubic;
g.SmoothingMode = SmoothingMode.HighQuality;
g.PixelOffsetMode = PixelOffsetMode.HighQuality;
using (var wrapMode = new ImageAttributes())
{
wrapMode.SetWrapMode(WrapMode.TileFlipXY);
g.DrawImage(sourceBmp, destRect, 0, 0, sourceBmp.Width, sourceBmp.Height, GraphicsUnit.Pixel, wrapMode);
}
}
bmpData = scaledBmp.LockBits(destRect, ImageLockMode.ReadOnly, PixelFormat.Format24bppRgb);
try
{
var dataArray = new byte[width * height * 3];
Marshal.Copy(bmpData.Scan0, dataArray, 0, dataArray.Length);
return(dataArray);
}
finally
{
scaledBmp.UnlockBits(bmpData);
}
}
}
