public unsafe System.Drawing.Bitmap BuildImage(int subsample = 1)
{
Verify.SubsampleRange(subsample);
lock (LoadingLock)
{
System.Drawing.Bitmap background = GetBackgroundImage(subsample, true);
// TODO ETW logging goes here
using (System.Drawing.Bitmap foreground = GetForegroundImage(subsample, true))
{
using (System.Drawing.Bitmap mask = GetMaskImage(subsample, true))
{
HasLoaded = true;
BitmapData backgroundData =
background.LockBits(new System.Drawing.Rectangle(0, 0, background.Width, background.Height),
ImageLockMode.ReadWrite, background.PixelFormat);
int backgroundPixelSize = DjvuImage.GetPixelSize(backgroundData.PixelFormat);
BitmapData foregroundData =
foreground.LockBits(new System.Drawing.Rectangle(0, 0, foreground.Width, foreground.Height),
ImageLockMode.ReadOnly, foreground.PixelFormat);
int foregroundPixelSize = DjvuImage.GetPixelSize(foregroundData.PixelFormat);
BitmapData maskData = mask.LockBits(new System.Drawing.Rectangle(0, 0, mask.Width, mask.Height),
ImageLockMode.ReadOnly, mask.PixelFormat);
//int maskPixelSize = GetPixelSize(maskData);
int bgndHeight = background.Height;
int bgndWidth = background.Width;
int fgndHeight = foreground.Height;
int fgndWidth = foreground.Width;
int maskHeight = mask.Height;
int maskWidth = mask.Width;
int maskbgnH = maskHeight / bgndHeight;
int maskfgnH = maskHeight / fgndHeight;
int maskbgnW = maskWidth / bgndWidth;
int maskfgnW = maskWidth / fgndWidth;
//Parallel.For(
// 0,
// height,
// y =>
// {
for (int y = 0, yf = 0, yb = 0; y < maskHeight && yb < bgndHeight && yf < fgndHeight; ++y, yf = yb = y)
{
byte *maskRow = (byte *)maskData.Scan0 + (y * maskData.Stride);
DjvuNet.Graphics.Pixel *backgroundRow = (DjvuNet.Graphics.Pixel *)(backgroundData.Scan0 + (yb * backgroundData.Stride));
DjvuNet.Graphics.Pixel *foregroundRow = (DjvuNet.Graphics.Pixel *)(foregroundData.Scan0 + (yf * foregroundData.Stride));
for (int x = 0, xf = 0, xb = 0; x < bgndWidth && xb < maskWidth && xf < fgndWidth; x++)
{
// Check if the mask byte is set
if (maskRow[x] > 0)
{
DjvuNet.Graphics.Pixel xF = foregroundRow[xf];
if (_IsInverted)
{
backgroundRow[xb] = InvertColor(xF);
}
else
{
backgroundRow[xb] = xF;
}
}
else if (_IsInverted)
{
backgroundRow[xb] = InvertColor(backgroundRow[xb]);
}
if (x >= 0)
{
if (x % maskbgnW == 0)
{
xb++;
}
if (x % maskfgnW == 0)
{
xf++;
}
}
}
if (y >= 0)
{
if (y % maskbgnH == 0)
{
yb++;
}
if (y % maskfgnH == 0)
{
yf++;
}
}
}
//});
mask.UnlockBits(maskData);
foreground.UnlockBits(foregroundData);
background.UnlockBits(backgroundData);
return(background);
}
}
}
}
/// <summary>
/// Gets the image for the page
/// </summary>
/// <returns>
/// <see cref="System.Drawing.Bitmap"/>Bitmap image.
/// </returns>
public unsafe System.Drawing.Bitmap BuildImage(int subsample = 1)
{
//
// TODO Fix image skew
//
Verify.SubsampleRange(subsample);
lock (_LoadingLock)
{
Stopwatch stopWatch = Stopwatch.StartNew();
System.Drawing.Bitmap background = GetBackgroundImage(subsample, false);
stopWatch.Stop();
// TODO ETW logging goes here
stopWatch.Restart();
using (System.Drawing.Bitmap foreground = GetForegroundImage(subsample, false))
{
stopWatch.Stop();
// TODO ETW logging goes here
stopWatch.Restart();
using (System.Drawing.Bitmap mask = GetTextImage(subsample, false))
{
stopWatch.Stop();
// TODO ETW logging goes here
stopWatch.Restart();
_HasLoaded = true;
BitmapData backgroundData =
background.LockBits(new System.Drawing.Rectangle(0, 0, background.Width, background.Height),
ImageLockMode.ReadWrite, background.PixelFormat);
int backgroundPixelSize = DjvuImage.GetPixelSize(backgroundData.PixelFormat);
BitmapData foregroundData =
foreground.LockBits(new System.Drawing.Rectangle(0, 0, foreground.Width, foreground.Height),
ImageLockMode.ReadOnly, foreground.PixelFormat);
int foregroundPixelSize = DjvuImage.GetPixelSize(foregroundData.PixelFormat);
BitmapData maskData = mask.LockBits(new System.Drawing.Rectangle(0, 0, mask.Width, mask.Height),
ImageLockMode.ReadOnly, mask.PixelFormat);
//int maskPixelSize = GetPixelSize(maskData);
int bgndHeight = background.Height;
int bgndWidth = background.Width;
int fgndHeight = foreground.Height;
int fgndWidth = foreground.Width;
int maskHeight = mask.Height;
int maskWidth = mask.Width;
int maskbgnH = maskHeight / bgndHeight;
int maskfgnH = maskHeight / fgndHeight;
int maskbgnW = maskWidth / bgndWidth;
int maskfgnW = maskWidth / fgndWidth;
//Parallel.For(
// 0,
// height,
// y =>
// {
;
for (int y = 0, yf = 0, yb = 0; y < maskHeight && yb < bgndHeight && yf < fgndHeight; y++)
{
byte *maskRow = (byte *)maskData.Scan0 + (y * maskData.Stride);
uint *backgroundRow = (uint *)(backgroundData.Scan0 + (yb * backgroundData.Stride));
uint *foregroundRow = (uint *)(foregroundData.Scan0 + (yf * foregroundData.Stride));
for (int x = 0, xf = 0, xb = 0; x < bgndWidth && xb < maskWidth && xf < fgndWidth; x++)
{
// Check if the mask byte is set
if (maskRow[x] > 0)
{
uint xF = foregroundRow[xf];
if (_IsInverted)
{
backgroundRow[xb] = InvertColor(xF);
}
else
{
backgroundRow[xb] = xF;
}
}
else if (_IsInverted == true)
{
uint xB = backgroundRow[xb];
backgroundRow[xb] = InvertColor(xB);
}
if (x > 0)
{
if (x % maskbgnW == 0)
{
xb++;
}
if (x % maskfgnW == 0)
{
xf++;
}
}
}
if (y > 0)
{
if (y % maskbgnH == 0)
{
yb++;
}
if (y % maskfgnH == 0)
{
yf++;
}
}
}
//});
mask.UnlockBits(maskData);
foreground.UnlockBits(foregroundData);
background.UnlockBits(backgroundData);
stopWatch.Stop();
// TODO ETW logging goes here
return(background);
}
}
}
}