private unsafe void ApplyRectangle(FastBitmap surface, Rectangle rect)
{
for (int y = rect.Left; y < rect.Bottom; ++y) {
PixelData* ptr = surface.GetPointAddress (rect.Left, y);
Apply (ptr, rect.Width);
}
}
public override void Apply(FastBitmap dst, Point dstOffset, FastBitmap src, Point srcOffset, int scanLength)
{
Apply (dst.GetPointAddress (dstOffset), src.GetPointAddress (srcOffset), scanLength);
}
/// <summary>
/// Provides a default implementation for performing dst = F(dst, src) or F(src) over some rectangle
/// of interest. May be slightly faster than calling the other multi-parameter Apply method, as less
/// variables are used in the implementation, thus inducing less register pressure.
/// </summary>
/// <param name="dst">The Surface to write pixels to, and from which pixels are read and used as the lhs parameter for calling the method <b>PixelData Apply(PixelData, PixelData)</b>.</param>
/// <param name="dstOffset">The pixel offset that defines the upper-left of the rectangle-of-interest for the dst Surface.</param>
/// <param name="src">The Surface to read pixels from for the rhs parameter given to the method <b>PixelData Apply(PixelData, PixelData)</b>b>.</param></param>
/// <param name="srcOffset">The pixel offset that defines the upper-left of the rectangle-of-interest for the src Surface.</param>
/// <param name="roiSize">The size of the rectangles-of-interest for all Surfaces.</param>
public void ApplyBase(FastBitmap dst, Point dstOffset, FastBitmap src, Point srcOffset, Size roiSize)
{
// Create bounding rectangles for each Surface
Rectangle dstRect = new Rectangle (dstOffset, roiSize);
if (dstRect.Width == 0 || dstRect.Height == 0)
return;
Rectangle srcRect = new Rectangle (srcOffset, roiSize);
if (srcRect.Width == 0 || srcRect.Height == 0)
return;
// Clip those rectangles to those Surface's bounding rectangles
Rectangle dstClip = Rectangle.Intersect (dstRect, dst.GetBounds ());
Rectangle srcClip = Rectangle.Intersect (srcRect, src.GetBounds ());
// If any of those Rectangles actually got clipped, then throw an exception
if (dstRect != dstClip)
throw new ArgumentOutOfRangeException
(
"roiSize",
"Destination roi out of bounds" +
string.Format (", dst.Size=({0},{1}", dst.Width, dst.Height) +
", dst.Bounds=" + dst.GetBounds ().ToString () +
", dstOffset=" + dstOffset.ToString () +
string.Format (", src.Size=({0},{1}", src.Width, src.Height) +
", srcOffset=" + srcOffset.ToString () +
", roiSize=" + roiSize.ToString () +
", dstRect=" + dstRect.ToString () +
", dstClip=" + dstClip.ToString () +
", srcRect=" + srcRect.ToString () +
", srcClip=" + srcClip.ToString ()
);
if (srcRect != srcClip)
throw new ArgumentOutOfRangeException ("roiSize", "Source roi out of bounds");
// Cache the width and height properties
int width = roiSize.Width;
int height = roiSize.Height;
// Do the work.
unsafe {
for (int row = 0; row < roiSize.Height; ++row) {
PixelData* dstPtr = dst.GetPointAddress (dstOffset.X, dstOffset.Y + row);
PixelData* srcPtr = src.GetPointAddress (srcOffset.X, srcOffset.Y + row);
Apply (dstPtr, srcPtr, width);
}
}
}