/// <summary>
/// Retreives a chunk of the raster.
/// </summary>
/// <param name="srcX">A minimum X coordinate of the querying area</param>
/// <param name="srcY">A minimum Y coordinate of the querying area</param>
/// <param name="srcWidth">A width of the querying area</param>
/// <param name="srcHeight">A height of the querying area</param>
/// <param name="maxDestWidth">A maximum width in pixels of the resulting raster</param>
/// <param name="maxDestHeight">A maximum height in pixels of the resulting raster</param>
/// <param name="bounds">A bounds of querying area on the map</param>
/// <param name="receiver">An object receiving raster</param>
public void QueryRaster(int srcX,
int srcY,
int srcWidth,
int srcHeight,
int maxDestWidth,
int maxDestHeight,
BoundingRectangle bounds,
IRasterReceiver receiver)
{
if (_bitmap == null)
{
throw new InvalidOperationException("Bitmap is not set");
}
Bitmap result = new Bitmap(Math.Max(maxDestWidth, 1), Math.Max(maxDestHeight, 1), _bitmap.PixelFormat);
using (Graphics g = Graphics.FromImage(result))
{
RectangleF srcRect = new RectangleF(srcX, srcY, srcWidth, srcHeight);
RectangleF destRect = new RectangleF(0, 0, maxDestWidth, maxDestHeight);
g.DrawImage(_bitmap, destRect, srcRect, GraphicsUnit.Pixel);
}
receiver.AddRasterPreview(result, bounds, Width, Height);
}
/// <summary>
/// Retreives a chunk of the raster.
/// </summary>
/// <param name="srcX">A minimum X coordinate of the querying area</param>
/// <param name="srcY">A minimum Y coordinate of the querying area</param>
/// <param name="srcWidth">A width of the querying area</param>
/// <param name="srcHeight">A height of the querying area</param>
/// <param name="maxDestWidth">A maximum width in pixels of the resulting raster</param>
/// <param name="maxDestHeight">A maximum height in pixels of the resulting raster</param>
/// <param name="bounds">A bounds of querying area on the map</param>
/// <param name="receiver">An object receiving raster</param>
public void QueryRaster(int srcX,
int srcY,
int srcWidth,
int srcHeight,
int maxDestWidth,
int maxDestHeight,
BoundingRectangle bounds,
IRasterReceiver receiver)
{
if (_bitmap == null)
throw new InvalidOperationException("Bitmap is not set");
Bitmap result = new Bitmap(Math.Max(maxDestWidth, 1), Math.Max(maxDestHeight, 1), _bitmap.PixelFormat);
using(Graphics g = Graphics.FromImage(result))
{
RectangleF srcRect = new RectangleF(srcX, srcY, srcWidth, srcHeight);
RectangleF destRect = new RectangleF(0, 0, maxDestWidth, maxDestHeight);
g.DrawImage(_bitmap, destRect, srcRect, GraphicsUnit.Pixel);
}
receiver.AddRasterPreview(result, bounds, Width, Height);
}
