public override unsafe Bitmap ToGdipBitmap()
{
Bitmap image = null;
const System.Drawing.Imaging.PixelFormat format = System.Drawing.Imaging.PixelFormat.Format24bppRgb;
using (Bitmap temp = new Bitmap(width, height, format))
{
System.Drawing.Imaging.BitmapData bitmapData = temp.LockBits(new Rectangle(0, 0, width, height), System.Drawing.Imaging.ImageLockMode.WriteOnly, format);
try
{
byte *destScan0 = (byte *)bitmapData.Scan0;
int destStride = bitmapData.Stride;
for (int y = 0; y < height; y++)
{
ColorBgr8 *src = (ColorBgr8 *)GetRowAddressUnchecked(y);
byte * dst = destScan0 + (y * destStride);
for (int x = 0; x < width; x++)
{
dst[0] = src->B;
dst[1] = src->G;
dst[2] = src->R;
src++;
dst += 3;
}
}
}
finally
{
temp.UnlockBits(bitmapData);
}
image = (Bitmap)temp.Clone();
}
return(image);
}
protected override unsafe void FitSurfaceImpl(SurfaceBase source)
{
float lastRowIndex = height - 1;
float lastColumnIndex = width - 1;
IntPtr srcColCachePtr = IntPtr.Zero;
try
{
srcColCachePtr = ImageSurfaceMemory.Allocate((ulong)width * sizeof(float));
float *srcColCache = (float *)srcColCachePtr;
// Precompute the source column indexes.
for (int x = 0; x < width; x++)
{
float u = x / lastColumnIndex;
srcColCache[x] = (u * source.Width) - 0.5f;
}
for (int y = 0; y < height; y++)
{
ColorBgr8 *destRow = (ColorBgr8 *)GetRowAddressUnchecked(y);
float v = y / lastRowIndex;
float srcY = (v * source.Height) - 0.5f;
int yint = (int)srcY;
float yfract = srcY - (float)Math.Floor(srcY);
for (int x = 0; x < width; x++)
{
float srcX = srcColCache[x];
int xint = (int)srcX;
float xfract = srcX - (float)Math.Floor(srcX);
// 1st row
ColorBgr8 p00 = *(ColorBgr8 *)source.GetPointAddressClamped(xint - 1, yint - 1);
ColorBgr8 p10 = *(ColorBgr8 *)source.GetPointAddressClamped(xint + 0, yint - 1);
ColorBgr8 p20 = *(ColorBgr8 *)source.GetPointAddressClamped(xint + 1, yint - 1);
ColorBgr8 p30 = *(ColorBgr8 *)source.GetPointAddressClamped(xint + 2, yint - 1);
// 2nd row
ColorBgr8 p01 = *(ColorBgr8 *)source.GetPointAddressClamped(xint - 1, yint + 0);
ColorBgr8 p11 = *(ColorBgr8 *)source.GetPointAddressClamped(xint + 0, yint + 0);
ColorBgr8 p21 = *(ColorBgr8 *)source.GetPointAddressClamped(xint + 1, yint + 0);
ColorBgr8 p31 = *(ColorBgr8 *)source.GetPointAddressClamped(xint + 2, yint + 0);
// 3rd row
ColorBgr8 p02 = *(ColorBgr8 *)source.GetPointAddressClamped(xint - 1, yint + 1);
ColorBgr8 p12 = *(ColorBgr8 *)source.GetPointAddressClamped(xint + 0, yint + 1);
ColorBgr8 p22 = *(ColorBgr8 *)source.GetPointAddressClamped(xint + 1, yint + 1);
ColorBgr8 p32 = *(ColorBgr8 *)source.GetPointAddressClamped(xint + 2, yint + 1);
// 4th row
ColorBgr8 p03 = *(ColorBgr8 *)source.GetPointAddressClamped(xint - 1, yint + 2);
ColorBgr8 p13 = *(ColorBgr8 *)source.GetPointAddressClamped(xint + 0, yint + 2);
ColorBgr8 p23 = *(ColorBgr8 *)source.GetPointAddressClamped(xint + 1, yint + 2);
ColorBgr8 p33 = *(ColorBgr8 *)source.GetPointAddressClamped(xint + 2, yint + 2);
float blue0 = BicubicUtil.CubicHermite(p00.B, p10.B, p20.B, p30.B, xfract);
float blue1 = BicubicUtil.CubicHermite(p01.B, p11.B, p21.B, p31.B, xfract);
float blue2 = BicubicUtil.CubicHermite(p02.B, p12.B, p22.B, p32.B, xfract);
float blue3 = BicubicUtil.CubicHermite(p03.B, p13.B, p23.B, p33.B, xfract);
float blue = BicubicUtil.CubicHermite(blue0, blue1, blue2, blue3, yfract);
float green0 = BicubicUtil.CubicHermite(p00.G, p10.G, p20.G, p30.G, xfract);
float green1 = BicubicUtil.CubicHermite(p01.G, p11.G, p21.G, p31.G, xfract);
float green2 = BicubicUtil.CubicHermite(p02.G, p12.G, p22.G, p32.G, xfract);
float green3 = BicubicUtil.CubicHermite(p03.G, p13.G, p23.G, p33.G, xfract);
float green = BicubicUtil.CubicHermite(green0, green1, green2, green3, yfract);
float red0 = BicubicUtil.CubicHermite(p00.R, p10.R, p20.R, p30.R, xfract);
float red1 = BicubicUtil.CubicHermite(p01.R, p11.R, p21.R, p31.R, xfract);
float red2 = BicubicUtil.CubicHermite(p02.R, p12.R, p22.R, p32.R, xfract);
float red3 = BicubicUtil.CubicHermite(p03.R, p13.R, p23.R, p33.R, xfract);
float red = BicubicUtil.CubicHermite(red0, red1, red2, red3, yfract);
destRow->B = (byte)FloatUtil.Clamp(blue, 0, 255);
destRow->G = (byte)FloatUtil.Clamp(green, 0, 255);
destRow->R = (byte)FloatUtil.Clamp(red, 0, 255);
destRow++;
}
}
}
finally
{
if (srcColCachePtr != IntPtr.Zero)
{
ImageSurfaceMemory.Free(srcColCachePtr);
srcColCachePtr = IntPtr.Zero;
}
}
}
