/// <summary>
/// Create a cropped copy of this image
/// </summary>
public RawImageInterleaved_UInt8 Crop(Quad target)
{
if (target == null)
{
throw new ArgumentNullException(nameof(target));
}
if (Data == null)
{
throw new InvalidOperationException();
}
// calculate bounds
int left = Range(0, target.X, Width);
int top = Range(0, target.Y, Height);
int right = Range(0, target.X + target.Width, Width);
int bottom = Range(0, target.Y + target.Height, Height);
int newWidth = right - left;
int newHeight = bottom - top;
if (newWidth < 1 || newHeight < 1)
{
throw new Exception("Invalid bounds in crop");
}
var result = new RawImageInterleaved_UInt8 {
Data = new byte[newWidth * newHeight * 4],
Width = newWidth,
Height = newHeight
};
// copy data
for (int y = 0; y < newHeight; y++)
{
for (int x = 0; x < newWidth; x++)
{
var src_i = ((y + top) * Width * 4) + ((x + left) * 4);
var dst_i = (y * newWidth * 4) + (x * 4);
result.Data[dst_i + 0] = Data[src_i + 0];
result.Data[dst_i + 1] = Data[src_i + 1];
result.Data[dst_i + 2] = Data[src_i + 2];
result.Data[dst_i + 3] = Data[src_i + 3];
}
}
return(result);
}
public static RawImageInterleaved_UInt8 CropFromData(byte[] bytes, int originalWidth, int originalHeight, int x, int y, int width, int height)
{
if (bytes == null)
{
throw new ArgumentNullException(nameof(bytes));
}
// calculate bounds
int left = Range(0, x, originalWidth);
int top = Range(0, y, originalHeight);
int right = Range(0, x + width, originalWidth);
int bottom = Range(0, y + height, originalHeight);
int newWidth = right - left;
int newHeight = bottom - top;
if (newWidth < 1 || newHeight < 1)
{
throw new Exception("Invalid bounds in crop");
}
var result = new RawImageInterleaved_UInt8 {
Data = new byte[newWidth * newHeight * 4],
Width = newWidth,
Height = newHeight
};
// copy data
for (int iy = 0; iy < newHeight; iy++)
{
for (int ix = 0; ix < newWidth; ix++)
{
var src_i = ((iy + top) * originalWidth * 4) + ((ix + left) * 4);
var dst_i = (iy * newWidth * 4) + (ix * 4);
result.Data[dst_i + 0] = bytes[src_i + 0];
result.Data[dst_i + 1] = bytes[src_i + 1];
result.Data[dst_i + 2] = bytes[src_i + 2];
result.Data[dst_i + 3] = bytes[src_i + 3];
}
}
return(result);
}