public void IsColumnBlank()
{
const int x = 4;
Assert.IsFalse(src.IsColumnBlank(x, 0.05));
for (int j = 0; j < src.Height; j++)
{
var clr = src.GetPixel(x, j);
src.SetPixel(x, j, Color.FromArgb(0, clr.R, clr.G, clr.B));
}
Assert.IsTrue(src.IsColumnBlank(x, 0.05));
}
public void Trim()
{
ImageData = new PixelBuffer(SourceData, SourceRect);
Rectangle newRect = new Rectangle(0, 0, SourceRect.Width, SourceRect.Height);
// trim the top
for (int i = 0; i < ImageData.Height; i++)
{
if (ImageData.IsRowBlank(i))
{
newRect.Y++;
newRect.Height--;
}
else
{
break;
}
}
if (newRect.Height == 0)
{
IsBlank = true;
return;
}
// trim the bottom
for (int i = ImageData.Height - 1; i >= 0; i--)
{
if (ImageData.IsRowBlank(i))
{
newRect.Height--;
}
else
{
break;
}
}
// trim the left
for (int i = 0; i < ImageData.Width; i++)
{
if (ImageData.IsColumnBlank(i))
{
newRect.X++;
newRect.Width--;
}
else
{
break;
}
}
// trim the right
for (int i = ImageData.Width - 1; i >= 0; i--)
{
if (ImageData.IsRowBlank(i))
{
newRect.Width--;
}
else
{
break;
}
}
ImageData = new PixelBuffer(ImageData, newRect);
Offset = newRect.Location;
}