GdPicture Imaging Forums

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private void executeCrop(object parameter)
        {
            if (_gdViewer.MouseMode == ViewerMouseMode.MouseModeAreaSelection)
            {
                double left = 0;
                double top = 0;
                double width = 0;
                double height = 0;
                using (GdPictureImaging _image = new GdPictureImaging())
                {
                    int tempImage = _gdPicturePDF.RenderPageToGdPictureImage(TIFF_DPI, false);

                    _gdViewer.DisplayFromGdPictureImage(tempImage);
                    _gdViewer.GetRectCoordinatesOnDocumentPixel(ref left, ref top, ref width, ref height);

                    if (width > 0 && height > 0)
                    { 
                         if (_image.Crop(tempImage, (int)left, (int)top, (int)width, (int)height) != GdPictureStatus.OK)
                         {
                             MessageBox.Show("Error: " + _image.GetStat());
                             return;
                         }

                         replacePDFPage((float)width, (float)height, tempImage);

                         _gdViewer.ClearRect();
                    }

                    _image.ReleaseGdPictureImage(tempImage);
                }
            }
        }

        private void replacePDFPage(float width, float height, int tempImage)
        {
            int pageNo = _gdPicturePDF.GetCurrentPage();
            //remove the original page from the pdf file
            _gdPicturePDF.DeletePage(pageNo);
            //insert a new, blank page
            GdPictureStatus status;
            if (_gdPicturePDF.GetPageCount() == 0)
            {
                if (_gdPicturePDF.NewPDF() == GdPictureStatus.OK)
                {
                    status = _gdPicturePDF.NewPage(width, height);
                }
            }
            else
            {
                status = _gdPicturePDF.InsertPage(width, height, pageNo);
            }
            //add the cropped image as a resource to the pdf
            string imageResx = _gdPicturePDF.AddImageFromGdPictureImage(tempImage, false, false);
            //draw it on the page
            if (_gdPicturePDF.GetStat() == GdPictureStatus.OK)
            {
                _gdPicturePDF.DrawImage(imageResx, 0, 0, width, height);
            }

            _image.ReleaseGdPictureImage(tempImage);
            _gdViewer.DisplayFromGdPicturePDF(_gdPicturePDF);
        }