private static UIImage RenderImage(CGPDFPage page)
{
var rect = page.GetBoxRect(CGPDFBox.Crop);
var pageRotation = page.RotationAngle;
var size = rect.Size;
UIGraphics.BeginImageContextWithOptions(size, false, (nfloat)(1));
var context = UIGraphics.GetCurrentContext();
context.SaveState();
context.TranslateCTM((nfloat)0.0, size.Height);
context.ScaleCTM(One, (nfloat)(-1.0));
context.SetFillColor(One, One);
context.FillRect(rect);
var transform = page.GetDrawingTransform(CGPDFBox.Crop, rect, 0, true);
context.ConcatCTM(transform);
context.DrawPDFPage(page);
var image = UIGraphics.GetImageFromCurrentImageContext();
context.RestoreState();
UIGraphics.EndImageContext();
return(image);
}
private void draw(CGContext context)
{
if (!PDFDocument.DocumentHasLoaded)
{
return;
}
context.SetFillColor(1.0f, 1.0f, 1.0f, 1.0f);
using (CGPDFPage pdfPage = PDFDocument.GetPage(_pageNumber)) {
context.TranslateCTM(0, Bounds.Height);
context.ScaleCTM(1.0f, -1.0f);
context.ConcatCTM(pdfPage.GetDrawingTransform(CGPDFBox.Crop, Bounds, 0, true));
context.SetRenderingIntent(CGColorRenderingIntent.Default);
context.InterpolationQuality = CGInterpolationQuality.Default;
context.DrawPDFPage(pdfPage);
}
}
public static UIImage PDF2Image(CGPDFPage page, nfloat width, nfloat scale)
{
UIImage img = new UIImage();
try
{
CGRect pageRect = page.GetBoxRect(CGPDFBox.Media);
nfloat pdfScale = width / pageRect.Size.Width;
pageRect.Size = new CGSize(pageRect.Size.Width * pdfScale, pageRect.Size.Height * pdfScale);
UIGraphics.BeginImageContextWithOptions(pageRect.Size, true, scale);
CGContext context = UIGraphics.GetCurrentContext();
// White BG
context.SetFillColor(1.0f, 1.0f, 1.0f, 1f);
context.FillRect(pageRect);
context.SaveState();
//border
context.SetStrokeColor(0f, 0f, 0f, 0.5f);
context.StrokeRect(pageRect);
// Next 3 lines makes the rotations so that the page look in the right direction
context.TranslateCTM(0.0f, pageRect.Size.Height);
context.ScaleCTM(1.0f, -1.0f);
CGAffineTransform transform = page.GetDrawingTransform(CGPDFBox.Media, pageRect, 0, true);
context.ConcatCTM(transform);
context.DrawPDFPage(page);
context.RestoreState();
img = UIGraphics.GetImageFromCurrentImageContext();
UIGraphics.EndImageContext();
context.Dispose();
}
catch (Exception ex)
{
}
return(img);
}
public override void Draw(CGRect rect)
{
base.Draw(rect);
//flip the CTM so the PDF will be drawn upright
using (CGContext g = UIGraphics.GetCurrentContext()) {
g.TranslateCTM(0, Bounds.Height);
g.ScaleCTM(1, -1);
// render the first page of the PDF
using (CGPDFPage pdfPage = pdfDoc.GetPage(1)) {
//get the affine transform that defines where the PDF is drawn
CGAffineTransform t = pdfPage.GetDrawingTransform(CGPDFBox.Crop, rect, 0, true);
//concatenate the pdf transform with the CTM for display in the view
g.ConcatCTM(t);
//draw the pdf page
g.DrawPDFPage(pdfPage);
}
}
}
internal void ConvertPagetoImage(int index)
{
if (this.PdfDocument == null || this.Element.ImageStreams.ContainsKey(index))
{
return;
}
float scaleFactor = 1;
UIImage image = null;
using (CGPDFPage pdfPage = this.PdfDocument.GetPage(index + 1))
{
if (pdfPage != null)
{
CGRect rect = pdfPage.GetBoxRect(CGPDFBox.Media);
nfloat factor = (nfloat)scaleFactor;
CGRect bounds = new CGRect(rect.X * factor, rect.Y * factor, rect.Width * factor, rect.Height * factor);
UIGraphics.BeginImageContext(bounds.Size);
CGContext context = UIGraphics.GetCurrentContext();
context.SetFillColor(1.0f, 1.0f, 1.0f, 1.0f);
context.FillRect(bounds);
context.TranslateCTM(0, bounds.Height);
context.ScaleCTM(factor, -factor);
context.ConcatCTM(pdfPage.GetDrawingTransform(CGPDFBox.Crop, rect, 0, true));
context.SetRenderingIntent(CGColorRenderingIntent.Default);
context.InterpolationQuality = CGInterpolationQuality.Default;
context.DrawPDFPage(pdfPage);
image = UIGraphics.GetImageFromCurrentImageContext();
UIGraphics.EndImageContext();
}
}
if (image != null)
{
this.Element.ImageStreams.Add(index, image);
this.Element.PDFViewModel.Items[index].PageData = image;
}
}
public override void Draw(RectangleF rect)
{
base.Draw(rect);
CGContext gctx = UIGraphics.GetCurrentContext();
gctx.TranslateCTM(0, Bounds.Height);
gctx.ScaleCTM(1, -1);
using (CGPDFPage pdfPg = _pdf.GetPage(PageNumber)) {
gctx.SaveState();
RectangleF r = new RectangleF(Bounds.Left, Bounds.Top, Bounds.Width, Bounds.Height + 44f);
CGAffineTransform tf = pdfPg.GetDrawingTransform(CGPDFBox.Crop, r, 0, true);
gctx.ConcatCTM(tf);
gctx.DrawPDFPage(pdfPg);
gctx.RestoreState();
gctx.TranslateCTM(0, Bounds.Height - 25);
gctx.SelectFont("Helvetica", 25f, CGTextEncoding.MacRoman);
gctx.ShowText(AnnotatedText);
}
}
public override void DrawInContext(CGContext context)
{
// PDF page drawing expects a Lower-Left coordinate system, so we flip the coordinate system
// before we start drawing.
context.TranslateCTM(0, Bounds.Height);
context.ScaleCTM(1, -1);
// Grab the first PDF page
using (CGPDFPage page = doc.GetPage(1)) {
// We're about to modify the context CTM to draw the PDF page where we want it, so save the graphics state in case we want to do more drawing
context.SaveState();
// CGPDFPageGetDrawingTransform provides an easy way to get the transform for a PDF page. It will scale down to fit, including any
// base rotations necessary to display the PDF page correctly.
CGAffineTransform pdfTransform = page.GetDrawingTransform(CGPDFBox.Crop, Bounds, 0, true);
// And apply the transform.
context.ConcatCTM(pdfTransform);
// Finally, we draw the page and restore the graphics state for further manipulations!
context.DrawPDFPage(page);
context.RestoreState();
}
}
private List <UIImage> ConvertToImages( )
{
Images = new List <UIImage>();
if (Doc == null)
{
throw new Exception("Could not load document");
}
for (Int32 i = 1; i <= Count; i++)
{
using (CGPDFPage Page = Doc.GetPage(i))
{
CGRect PageRect = Page.GetBoxRect(CGPDFBox.Media);
//nfloat Scale = 1;//View.Frame.Height / PageRect.Height;
//PageRect.Size = new CGSize(PageRect.Height * Scale, PageRect.Width * Scale);
if (PageRect.Height > PageRect.Width)
{
PageRect.Size = new CGSize(PageRect.Height, PageRect.Width);
}
CGRect MediaBox = Page.GetBoxRect(CGPDFBox.Media);
CGRect CropBox = Page.GetBoxRect(CGPDFBox.Crop);
nfloat TopMargin = CropBox.GetMinY() - MediaBox.GetMinY();
nfloat BottomMargin = MediaBox.GetMaxY() - CropBox.GetMaxY();
nfloat LeftMargin = CropBox.GetMinX() - MediaBox.GetMinX();
nfloat RightMargin = MediaBox.GetMaxX() - CropBox.GetMaxX();
if (TopMargin + BottomMargin + LeftMargin + RightMargin > 0)
{
PageRect = new CGRect(
PageRect.Location,
new CGSize(
PageRect.Size.Width - (LeftMargin + RightMargin),
PageRect.Size.Height - (TopMargin + BottomMargin)
)
);
}
UIGraphics.BeginImageContext(PageRect.Size);
using (CGContext context = UIGraphics.GetCurrentContext())
{
context.SaveState();
context.TranslateCTM(0, PageRect.Size.Height);
context.ScaleCTM(1, -1);
context.ConcatCTM(
Page.GetDrawingTransform(CGPDFBox.Crop, PageRect, 0, true)
);
context.DrawPDFPage(Page);
context.RestoreState();
Images.Add(UIGraphics.GetImageFromCurrentImageContext());
}
UIGraphics.EndImageContext();
}
}
return(Images);
}
private static UIImage RenderImage (CGPDFPage page)
{
var rect = page.GetBoxRect (CGPDFBox.Crop);
var pageRotation = page.RotationAngle;
var size = rect.Size;
UIGraphics.BeginImageContextWithOptions (size, false, (nfloat)(1));
var context = UIGraphics.GetCurrentContext ();
context.SaveState ();
context.TranslateCTM ((nfloat)0.0, size.Height);
context.ScaleCTM (One, (nfloat)(-1.0));
context.SetFillColor (One, One);
context.FillRect (rect);
var transform = page.GetDrawingTransform (CGPDFBox.Crop, rect, 0, true);
context.ConcatCTM (transform);
context.DrawPDFPage (page);
var image = UIGraphics.GetImageFromCurrentImageContext ();
context.RestoreState ();
UIGraphics.EndImageContext ();
return image;
}
