Aggiungi filigrana a un PDF con C++
Durante la conversione di un file Excel in PDF, potresti avere bisogno di aggiungere una filigrana al file PDF. I seguenti esempi mostrano come aggiungere filigrane di testo e immagine al PDF durante il rendering.
Aggiungi filigrana di testo al PDF
Puoi facilmente aggiungere una filigrana di testo al PDF specificando il testo e il font corrispondente. Inoltre, puoi impostare l’allineamento, l’offset, la rotazione, l’opacità, primo piano/sfondo e la scala sulla pagina in RenderingWatermark.
#include <iostream>
#include "Aspose.Cells.h"
using namespace Aspose::Cells;
using namespace Aspose::Cells::Rendering;
int main()
{
Aspose::Cells::Startup();
// Prepare a workbook with 3 pages.
Workbook wb;
wb.GetWorksheets().Get(0).GetCells().Get(u"A1").PutValue(u"Page1");
int index = wb.GetWorksheets().Add();
wb.GetWorksheets().Get(index).GetCells().Get(u"A1").PutValue(u"Page2");
index = wb.GetWorksheets().Add();
wb.GetWorksheets().Get(index).GetCells().Get(u"A1").PutValue(u"Page3");
wb.GetWorksheets().Get(index).GetPageSetup().SetPaperSize(PaperSizeType::PaperA3);
// Create a font for watermark, and specify bold, italic, color.
RenderingFont font(u"Calibri", 68);
font.SetItalic(true);
font.SetBold(true);
font.SetColor(Color::Blue());
// Create a watermark from text and the specified font.
RenderingWatermark watermark(u"Watermark", font);
// Specify horizontal and vertical alignment.
watermark.SetHAlignment(TextAlignmentType::Center);
watermark.SetVAlignment(TextAlignmentType::Center);
// Specify rotation.
watermark.SetRotation(30);
// Specify opacity.
watermark.SetOpacity(0.6f);
// Specify the scale to page (e.g., 100, 50) in percent.
watermark.SetScaleToPagePercent(50);
// Specify watermark for rendering to PDF.
PdfSaveOptions options;
options.SetWatermark(watermark);
// Save the workbook with the watermark.
wb.Save(u"output_text_watermark.pdf", options);
std::cout << "Workbook saved with watermark successfully!" << std::endl;
Aspose::Cells::Cleanup();
}
Aggiungi filigrana di immagine al PDF
Puoi aggiungere una filigrana immagine al PDF semplicemente specificando i byte dell’immagine. In più, puoi impostare l’allineamento, l’offset, la rotazione, l’opacità, primo piano/sfondo e la scala sulla pagina in RenderingWatermark.
#include <iostream>
#include "Aspose.Cells.h"
using namespace Aspose::Cells;
using namespace Aspose::Cells::Rendering;
int main()
{
Aspose::Cells::Startup();
// Create a workbook with 3 pages
Workbook wb;
wb.GetWorksheets().Get(0).GetCells().Get(u"A1").PutValue(u"Page1");
int index = wb.GetWorksheets().Add();
wb.GetWorksheets().Get(index).GetCells().Get(u"A1").PutValue(u"Page2");
index = wb.GetWorksheets().Add();
wb.GetWorksheets().Get(index).GetCells().Get(u"A1").PutValue(u"Page3");
wb.GetWorksheets().Get(index).GetPageSetup().SetPaperSize(PaperSizeType::PaperA3);
// Create a watermark from image (prepare image bytes)
Vector<uint8_t> imageBytes; // Assume image bytes are prepared
RenderingWatermark watermark(imageBytes);
// Specify offset to alignment
watermark.SetOffsetX(100);
watermark.SetOffsetY(200);
// Specify rotation
watermark.SetRotation(30);
// Specify watermark to background
watermark.SetIsBackground(true);
// Specify opacity
watermark.SetOpacity(0.6f);
// Specify the scale to page (e.g., 100, 50) in percent
watermark.SetScaleToPagePercent(50);
// Specify watermark for rendering to PDF
PdfSaveOptions options;
options.SetWatermark(watermark);
// Save the workbook with the watermark
wb.Save(u"output_image_watermark.pdf", options);
std::cout << "Workbook saved with watermark successfully!" << std::endl;
Aspose::Cells::Cleanup();
}