internal unsafe static Bitmap BlendImages(Bitmap start, Bitmap end, double blend, bool parallel, out TimeSpan time)
{
// Validate parameters
if (start.Width != end.Width || start.Height != end.Height)
throw new ArgumentException("The sizes of images do not match.");
if (blend < 0 || blend > 1)
throw new ArgumentOutOfRangeException("blend", blend, "Must be in the range [0.0,1.1].");
// Create the output image
int width = start.Width, height = start.Height;
Bitmap output = new Bitmap(width, height);
var sw = new Stopwatch();
// Blend the input images into the output
using (FastBitmap fastOut = new FastBitmap(output))
using (FastBitmap fastStart = new FastBitmap(start))
using (FastBitmap fastEnd = new FastBitmap(end))
{
if (parallel)
{
// Blend the images in parallel
sw.Restart();
Parallel.For(0, height, j =>
{
PixelData* outPixel = fastOut.GetInitialPixelForRow(j);
PixelData* startPixel = fastStart.GetInitialPixelForRow(j);
PixelData* endPixel = fastEnd.GetInitialPixelForRow(j);
for (int i = 0; i < width; i++)
{
// Blend the input pixels into the output pixel
outPixel->R = (byte)((startPixel->R * blend) + .5 + (endPixel->R * (1 - blend))); // .5 for rounding
outPixel->G = (byte)((startPixel->G * blend) + .5 + (endPixel->G * (1 - blend)));
outPixel->B = (byte)((startPixel->B * blend) + .5 + (endPixel->B * (1 - blend)));
outPixel++;
startPixel++;
endPixel++;
}
});
sw.Stop();
}
else
{
// Blend the images sequentially
sw.Restart();
for(int j=0; j<height; j++)
{
PixelData* outPixel = fastOut.GetInitialPixelForRow(j);
PixelData* startPixel = fastStart.GetInitialPixelForRow(j);
PixelData* endPixel = fastEnd.GetInitialPixelForRow(j);
for (int i = 0; i < width; i++)
{
// Blend the input pixels into the output pixel
outPixel->R = (byte)((startPixel->R * blend) + .5 + (endPixel->R * (1 - blend))); // .5 for rounding
outPixel->G = (byte)((startPixel->G * blend) + .5 + (endPixel->G * (1 - blend)));
outPixel->B = (byte)((startPixel->B * blend) + .5 + (endPixel->B * (1 - blend)));
outPixel++;
startPixel++;
endPixel++;
}
}
sw.Stop();
}
}
// Return the new image
time = sw.Elapsed;
return output;
}
internal unsafe Bitmap BlendImages(Bitmap start, Bitmap end, double blend, bool parallel)
{
// Validate parameters
if (start.Width != end.Width || start.Height != end.Height)
{
throw new ArgumentException("The sizes of images do not match.");
}
if (blend < 0 || blend > 1)
{
throw new ArgumentOutOfRangeException("blend", blend, "Must be in the range [0.0,1.1].");
}
// Create the output image
int width = start.Width, height = start.Height;
Bitmap output = new Bitmap(width, height);
// Blend the input images into the output
using (FastBitmap fastOut = new FastBitmap(output))
using (FastBitmap fastStart = new FastBitmap(start))
using (FastBitmap fastEnd = new FastBitmap(end))
{
if (parallel)
{
// Blend the images in parallel
Parallel.For(0, height, j =>
{
PixelData *outPixel = fastOut.GetInitialPixelForRow(j);
PixelData *startPixel = fastStart.GetInitialPixelForRow(j);
PixelData *endPixel = fastEnd.GetInitialPixelForRow(j);
for (int i = 0; i < width; i++)
{
// Blend the input pixels into the output pixel
outPixel->R = (byte)((startPixel->R * blend) + .5 + (endPixel->R * (1 - blend))); // .5 for rounding
outPixel->G = (byte)((startPixel->G * blend) + .5 + (endPixel->G * (1 - blend)));
outPixel->B = (byte)((startPixel->B * blend) + .5 + (endPixel->B * (1 - blend)));
outPixel++;
startPixel++;
endPixel++;
}
});
}
else
{
// Blend the images sequentially
for (int j = 0; j < height; j++)
{
PixelData *outPixel = fastOut.GetInitialPixelForRow(j);
PixelData *startPixel = fastStart.GetInitialPixelForRow(j);
PixelData *endPixel = fastEnd.GetInitialPixelForRow(j);
for (int i = 0; i < width; i++)
{
// Blend the input pixels into the output pixel
outPixel->R = (byte)((startPixel->R * blend) + .5 + (endPixel->R * (1 - blend))); // .5 for rounding
outPixel->G = (byte)((startPixel->G * blend) + .5 + (endPixel->G * (1 - blend)));
outPixel->B = (byte)((startPixel->B * blend) + .5 + (endPixel->B * (1 - blend)));
outPixel++;
startPixel++;
endPixel++;
}
}
}
}
return(output);
}