/// <summary>
/// Turns the lines into a BlockLine
/// </summary>
private unsafe BlockLine GetBlockLine(byte *[] lines, LockBitsData data)
{
BlockLine blockLine = new BlockLine(_pData.Columns, LineFillMode.Default);
// Advance one block width at a time
int step = _elementWidth * data.BytesPerPixel;
for (int offset = 0; offset < data.WidthInBytes; offset += step)
{
blockLine.Add(GetPixels(lines, offset, step, data.BytesPerPixel));
}
return(blockLine);
}
/// <summary>
/// Locks the bitmap into memory and calls the EditAction
/// </summary>
public static void EditBitmap(Bitmap bmp, EditAction action)
{
if (bmp == null)
{
throw new ArgumentNullException("bmp");
}
if (action == null)
{
throw new ArgumentNullException("action");
}
Rectangle rect = new Rectangle(0, 0, bmp.Width, bmp.Height);
PixelFormat format = bmp.PixelFormat;
BitmapData bmpData = bmp.LockBits(rect, ImageLockMode.ReadWrite, format);
LockBitsData data = new LockBitsData(bmpData, format);
action(data);
bmp.UnlockBits(bmpData);
}
/// <summary>
/// Gets the pixel colors from a bitmap
/// </summary>
private unsafe void GetPixelColors(LockBitsData data)
{
byte *ptr = (byte *)data.Scan0;
for (int y = 0; y < data.HeightInPixels; y++)
{
byte *line = ptr + y * data.Stride;
for (int x = 0; x < data.WidthInBytes; x += data.BytesPerPixel)
{
_red = line[x + 2];
_green = line[x + 1];
_blue = line[x + 0];
ApplySettings2(Settings.NegativeImage);
ApplySettings3(Settings.GrayscaleImage);
Color c = Color.FromArgb(_red, _green, _blue);
_pixels[x / data.BytesPerPixel, y] = c;
}
}
}
/// <summary>
/// Turns the BlockLines into a bitmap
/// </summary>
private unsafe void BuildImage(LockBitsData data)
{
List <int> steps = Utility.GetSteps(data.HeightInPixels, _elementHeight);
byte *ptr = (byte *)data.Scan0;
Parallel.ForEach(steps, y =>
{
// Get the appropriate number of lines
byte *[] lines = new byte *[_elementHeight];
for (int i = 0; i < _elementHeight; i++)
{
lines[i] = ptr + (y + i) * data.Stride;
}
int index = y / _elementHeight;
BuildBlockLine(lines, index, data.BytesPerPixel);
_pData.Dialog.IncrementProgress();
});
}