public void TestCrop()
{
ITiffPixelBuffer <TiffGray8> pixelBuffer = InitializePixelBuffer(out TiffGray8[] pixels);
TiffPixelBuffer <TiffGray8> structBuffer = pixelBuffer.AsPixelBuffer();
Assert.Equal(3, structBuffer.Width);
Assert.Equal(2, structBuffer.Height);
Assert.False(structBuffer.IsEmpty);
Assert.Throws <ArgumentOutOfRangeException>("offset", () => structBuffer.Crop(new TiffPoint(4, 0)));
Assert.Throws <ArgumentOutOfRangeException>("offset", () => structBuffer.Crop(new TiffPoint(0, 3)));
Assert.Throws <ArgumentOutOfRangeException>("offset", () => structBuffer.Crop(new TiffPoint(4, 3)));
Assert.Throws <ArgumentOutOfRangeException>("size", () => structBuffer.Crop(new TiffPoint(0, 0), new TiffSize(4, 1)));
Assert.Throws <ArgumentOutOfRangeException>("size", () => structBuffer.Crop(new TiffPoint(0, 0), new TiffSize(1, 3)));
Assert.Throws <ArgumentOutOfRangeException>("size", () => structBuffer.Crop(new TiffPoint(0, 0), new TiffSize(4, 3)));
structBuffer = pixelBuffer.Crop(new TiffPoint(1, 1), new TiffSize(1, 1));
Assert.Equal(1, structBuffer.Width);
Assert.Equal(1, structBuffer.Height);
structBuffer = pixelBuffer.AsPixelBuffer().Crop(new TiffPoint(1, 1), new TiffSize(1, 1));
Assert.Equal(1, structBuffer.Width);
Assert.Equal(1, structBuffer.Height);
structBuffer = pixelBuffer.Crop(new TiffPoint(1, 1));
Assert.Equal(2, structBuffer.Width);
Assert.Equal(1, structBuffer.Height);
structBuffer = pixelBuffer.AsPixelBuffer().Crop(new TiffPoint(1, 1));
Assert.Equal(2, structBuffer.Width);
Assert.Equal(1, structBuffer.Height);
ITiffPixelBuffer <TiffGray8> pixelBuffer2 = TiffPixelBufferUnsafeMarshal.GetBuffer(structBuffer, out TiffPoint offset, out TiffSize size);
Assert.True(ReferenceEquals(pixelBuffer, pixelBuffer2));
Assert.Equal(1, offset.X);
Assert.Equal(1, offset.Y);
Assert.Equal(2, size.Width);
Assert.Equal(1, size.Height);
}
/// <summary>
/// Crop a sub region from <paramref name="buffer"/>.
/// </summary>
/// <typeparam name="TPixel">The pixel type.</typeparam>
/// <param name="buffer">The original pixel buffer.</param>
/// <param name="offset">The number of columns and rows to skip.</param>
/// <param name="size">The number of columns and rows to take.</param>
/// <returns>A <see cref="TiffPixelBuffer{TPixel}"/> representing the cropped region.</returns>
public static TiffPixelBuffer <TPixel> Crop <TPixel>(this ITiffPixelBuffer <TPixel> buffer, TiffPoint offset, TiffSize size) where TPixel : unmanaged
{
return(buffer.AsPixelBuffer().Crop(offset, size));
}