/// <summary>
/// Create a BitmapBuffer from a Bitmap, a Rectangle specifying what part from the Bitmap to take and a flag if we need a clone
/// </summary>
/// <param name="sourceBmp">Bitmap</param>
/// <param name="applyRect">Rectangle</param>
/// <param name="clone">bool specifying if the bitmap needs to be cloned</param>
public BitmapBuffer(Bitmap sourceBmp, Rectangle applyRect, bool clone)
{
this.clone = clone;
Rectangle sourceRect = new Rectangle(applyRect.X, applyRect.Y, applyRect.Width, applyRect.Height);
Rectangle bitmapRect = new Rectangle(0, 0, sourceBmp.Width, sourceBmp.Height);
if (sourceRect.IsEmpty)
{
sourceRect = bitmapRect;
}
else
{
sourceRect.Intersect(bitmapRect);
}
// Does the rect have any pixels?
if (sourceRect.Height <= 0 || sourceRect.Width <= 0)
{
return;
}
if (clone)
{
this.bitmap = ImageHelper.CloneArea(sourceBmp, sourceRect, PixelFormat.DontCare);
// Set "this" rect to location 0,0
// as the Cloned Bitmap is only the part we want to work with
this.rect = new Rectangle(0, 0, bitmap.Width, bitmap.Height);
}
else if (!ImageHelper.SupportsPixelFormat(sourceBmp) && PixelFormat.Format8bppIndexed != sourceBmp.PixelFormat)
{
throw new ArgumentException("Unsupported pixel format: " + sourceBmp.PixelFormat + " set clone to true!");
}
else
{
this.bitmap = sourceBmp;
this.rect = sourceRect;
}
}