public void InitCanvas(Size size)
{
if (_canvasBitmap == null)
{
_canvasBitmap = new PdfBitmap(size.Width, size.Height, true);
}
if (_formsBitmap != null)
{
_formsBitmap.Dispose();
}
_formsBitmap = new PdfBitmap(size.Width, size.Height, true);
_waitTime = 70;
_prevTicks = DateTime.Now.Ticks;
}
public void Dispose()
{
if (Bitmap != null)
{
Bitmap.Dispose();
}
Bitmap = null;
}
public void ReleaseCanvas()
{
foreach (var i in this)
{
ReleasePage(i.Key);
}
this.Clear();
if (_canvasBitmap != null)
{
_canvasBitmap.Dispose();
}
_canvasBitmap = null;
}
private void RenderPage(int pageNumber, DrawingVisual visual)
{
int dpiX = PrinterTicket.PageResolution.X ?? 96;
int dpiY = PrinterTicket.PageResolution.Y ?? 96;
//Calculate the size of the printable area in inches
//The printable area represents a DIPs (Device independed points) (DIPs = pixels/(DPI/96) )
var fitSize = new Size()
{
Width = PageSize.Width / 96.0,
Height = PageSize.Height / 96.0
};
//Get page's size in inches
//The page size represents a points (1pt = 1/72 inch)
var pdfSize = new Size()
{
Width = _doc.Pages[pageNumber].Width / 72.0f,
Height = _doc.Pages[pageNumber].Height / 72.0f
};
//If page was rotated in original file, then we need to "rotate the paper in printer".
//For that just swap the width and height of the paper.
if (_doc.Pages[pageNumber].OriginalRotation == PageRotate.Rotate270 ||
_doc.Pages[pageNumber].OriginalRotation == PageRotate.Rotate90)
{
fitSize = new Size(fitSize.Height, fitSize.Width);
}
//Calculate the render size (in inches) fitted to the paper's size.
var rSize = GetRenderSize(pdfSize, fitSize);
int pixelWidth = (int)(rSize.Width * dpiX);
int pixelHeight = (int)(rSize.Height * dpiY);
using (PdfBitmap bmp = new PdfBitmap(pixelWidth, pixelHeight, true))
{
//Render to PdfBitmap using page's Render method with FPDF_PRINTING flag.
_doc.Pages[pageNumber].RenderEx(
bmp,
0,
0,
pixelWidth,
pixelHeight,
PageRotate.Normal,
RenderFlags.FPDF_PRINTING | RenderFlags.FPDF_ANNOT);
//Rotates the PdfBitmap image depending on the orientation of the page
PdfBitmap b2 = null;
if (PageRotation(_doc.Pages[pageNumber]) == PageRotate.Rotate270)
{
b2 = bmp.SwapXY(false, true);
}
else if (PageRotation(_doc.Pages[pageNumber]) == PageRotate.Rotate180)
{
b2 = bmp.FlipXY(true, true);
}
else if (PageRotation(_doc.Pages[pageNumber]) == PageRotate.Rotate90)
{
b2 = bmp.SwapXY(true, false);
}
int stride = b2 == null ? bmp.Stride : b2.Stride;
int width = b2 == null ? bmp.Width : b2.Width;
int height = b2 == null ? bmp.Height : b2.Height;
IntPtr buffer = b2 == null ? bmp.Buffer : b2.Buffer;
var imgsrc = CreateImageSource(b2 ?? bmp);
if (b2 != null)
{
b2.Dispose();
}
var dc = visual.RenderOpen();
dc.DrawImage(imgsrc, new Rect(0, 0, imgsrc.PixelWidth / (dpiX / 96.0), imgsrc.Height / (dpiY / 90.0)));
dc.Close();
imgsrc = null;
}
}
