public Page()
{
fImageHandler = new ImageHandler(this);
fLayoutThumbnail = null;
fImageBoundsInches = null;
fSizeInch = null;
fResolutionDpi = null;
}
public double Contrast; // 0 to 1
public DataSourceSettings()
{
ShowSettingsUI = false;
ShowTransferUI = true;
EnableFeeder = false;
ColorMode = ColorModeEnum.BW;
ScanArea = new BoundsInches(0, 0, SizeInches.Letter);
Resolution = 200;
Threshold = 0.5;
Brightness = 0.5;
Contrast = 0.5;
}
private static int GetTransformationIndex(TransformationMatrix transformationMatrix, BoundsInches imageBounds)
{
int[] vector = new int[4];
vector[0] = GetSignOrZero(transformationMatrix.a);
vector[1] = GetSignOrZero(transformationMatrix.b);
vector[2] = GetSignOrZero(transformationMatrix.c);
vector[3] = GetSignOrZero(transformationMatrix.d);
int result = 0; // Default is to use the original picture
for(int i = 0; i < 8; i++)
{
bool match = true;
for(int j = 0; j < 4; j++)
{
if(fTransformationArray[i, j] != vector[j])
{
match = false;
}
}
if(match)
{
result = i;
}
}
// TODO: Calculate imageBounds
imageBounds = null;
return result;
}
private static TransformationMatrix GetTransformationMatrix(BoundsInches imageBounds, int transformationIndex)
{
TransformationMatrix result = new TransformationMatrix();
result.a = fTransformationArray[transformationIndex, 0];
result.b = fTransformationArray[transformationIndex, 1];
result.c = fTransformationArray[transformationIndex, 2];
result.d = fTransformationArray[transformationIndex, 3];
result.e = fTransformationArray[transformationIndex, 4];
result.f = fTransformationArray[transformationIndex, 5];
result.a *= imageBounds.Width;
result.b *= imageBounds.Height;
result.c *= imageBounds.Width;
result.d *= imageBounds.Height;
result.e *= imageBounds.Width;
result.e += imageBounds.X;
result.f *= imageBounds.Height;
result.f += imageBounds.Y;
result.a *= 72;
result.b *= 72;
result.c *= 72;
result.d *= 72;
result.e *= 72;
result.f *= 72;
return result;
}
public static void AddJpegToPage(IntPtr document, IntPtr page, Image image, BoundsInches imageBounds, int transformationIndex)
{
byte[] buffer = Utils.Imaging.ByteArrayFromImage(image);
// imageBounds are dimensions of transformed image (as displayed)
TransformationMatrix matrix = GetTransformationMatrix(imageBounds, transformationIndex);
unsafe
{
fixed(byte* p = buffer)
{
JpegInfo info = new JpegInfo();
info.Height = image.Height;
info.Width = image.Width;
info.Data = (IntPtr)p;
info.Size = buffer.Length;
Pdfium.AddJpegImageToPage(document, page, &info, &matrix);
}
}
}
public static void AddBitmapToPage(IntPtr document, IntPtr page, Image image, BoundsInches imageBounds, int transformationIndex)
{
Bitmap bitmap = image as Bitmap;
BitmapData bi = bitmap.LockBits(
new Rectangle(0, 0, bitmap.Width, bitmap.Height),
ImageLockMode.ReadOnly,
bitmap.PixelFormat);
PixelFormatEnum pf = ConvertPixelFormat_SystemToLibPdfium(bi.PixelFormat);
TransformationMatrix matrix = GetTransformationMatrix(imageBounds, transformationIndex);
try
{
unsafe
{
BitmapInfo info = new BitmapInfo();
info.Height = bitmap.Height;
info.Width = bitmap.Width;
info.PixelFormat = pf;
info.Data = bi.Scan0;
info.Stride = bi.Stride;
Pdfium.AddBitmapToPage(document, page, &info, &matrix);
}
}
finally
{
bitmap.UnlockBits(bi);
}
}
private void CalculateBounds()
{
SizePixels imageSizePixels = fImageHandler.SizePixels;
SizeInches pageSizeInches = fSizeInch;
fResolutionDpi = fImageHandler.ResolutionDpi;
if(fResolutionDpi.IsDefined == false)
{
double image_aspect_ratio = imageSizePixels.Width / (double)imageSizePixels.Height;
double page_aspect_ratio = pageSizeInches.Width / pageSizeInches.Height;
double res;
if(image_aspect_ratio > page_aspect_ratio)
{
// means our image has the width as the maximum dimension
res = imageSizePixels.Width / pageSizeInches.Width;
}
else
{
// means our image has the height as the maximum dimension
res = imageSizePixels.Height / pageSizeInches.Height;
}
fResolutionDpi = new ResolutionDpi(res);
}
// Calculate Image Layout
double imageWidthInch = imageSizePixels.Width / fResolutionDpi.Horizontal;
double imageHeightInch = imageSizePixels.Height / fResolutionDpi.Vertical;
double x = (pageSizeInches.Width - imageWidthInch) / 2;
double y = (pageSizeInches.Height - imageHeightInch) / 2;
fImageBoundsInches = new BoundsInches(x, y, imageWidthInch, imageHeightInch);
}
private bool AdjustScannerSettings(
int resolutionDpi,
BoundsInches scanAreaInches,
int brightnessPercents,
int contrastPercents,
int colorMode)
{
bool result;
try
{
WiaUtils.SetProperty(fItem.Properties, WiaProperty.HorizontalResolution, resolutionDpi);
WiaUtils.SetProperty(fItem.Properties, WiaProperty.VerticalResolution, resolutionDpi);
WiaUtils.SetProperty(fItem.Properties, WiaProperty.HorizontalStartPosition, (int)(scanAreaInches.X * resolutionDpi));
WiaUtils.SetProperty(fItem.Properties, WiaProperty.VerticalStartPosition, (int)(scanAreaInches.Y * resolutionDpi));
WiaUtils.SetProperty(fItem.Properties, WiaProperty.HorizontalExtent, (int)(scanAreaInches.Width * resolutionDpi));
WiaUtils.SetProperty(fItem.Properties, WiaProperty.VerticalExtent, (int)(scanAreaInches.Height * resolutionDpi));
WiaUtils.SetProperty(fItem.Properties, WiaProperty.Brightness, brightnessPercents);
WiaUtils.SetProperty(fItem.Properties, WiaProperty.Contrast, contrastPercents);
WiaUtils.SetProperty(fItem.Properties, WiaProperty.CurrentIntent, colorMode);
result = true;
}
catch
{
result = false;
}
return result;
}