Convert a Multi-page Document to an Image

Aspose.Words for C++ allows users to export multi-page documents to raster images. This can be useful for generating previews, archives, or visual representations of documents for non-editable use.

What Formats Support Multi-page Export?

Aspose.Words supports multi-page export to the following raster image formats:

• Jpeg
• Gif
• Png
• Bmp
• Tiff
• WebP

How to Export a Multi-page Document to an Image

The feature of exporting a multi-page document to an image is implemented using the MultiPageLayout class – you can specify how the pages should be organized when saving to an image:

• SinglePage – save only the first of the specified pages
• Grid – arrange the pages in a grid, left-to-right and top-to-bottom, while specifying the number of columns
• Horizontal – arrange the pages horizontally side-by-side, left-to-right, in a single output
• Vertical – arrange the pages vertically one below the other in a single output
• TiffFrames – arrange each page as a separate frame in a multi-frame TIFF image, applies only to TIFF image formats

The following code example shows how to save a multi-page DOCX document as JPEG image with Horizontal layout:

auto doc = System::MakeObject<Aspose::Words::Document>(u"Rendering.docx");

auto options = System::MakeObject<Aspose::Words::Saving::ImageSaveOptions>(Aspose::Words::SaveFormat::Jpeg);
// Set up Horizontal layout.
options.MultiPageLayout = MultiPageLayout.Horizontal(10);

doc->Save(u"ImageSaveOptions.GridLayout.jpg", options);

You can also customize the output file page appearance – specify BackColor, BorderColor, and BorderWidth.

The following code example shows how to save a multi-page DOCX document as PNG image with Grid layout:

auto doc = System::MakeObject<Aspose::Words::Document>(u"Rendering.docx");

auto options = System::MakeObject<Aspose::Words::Saving::ImageSaveOptions>(Aspose::Words::SaveFormat::Jpeg);
// Set up a grid layout with:
// - 3 columns per row.
// - 10pts spacing between pages (horizontal and vertical).
options->set_PageLayout(Aspose::Words::Saving::MultiPageLayout::Grid(3, 10.0f, 10.0f));

// Customize the background and border.
options->get_PageLayout()->set_BackColor(System::Drawing::Color::get_LightGray());
options->get_PageLayout()->set_BorderColor(System::Drawing::Color::get_Blue());
options->get_PageLayout()->set_BorderWidth(2.0f);

doc->Save(u"ImageSaveOptions.GridLayout.png", options);

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FAQ

1. Q: How can I export each page of a document as a separate image file?
   A: Use the SinglePage layout together with the PageRange property of ImageSaveOptions. Set PageRange to the desired page number and call Save inside a loop for all pages.

2. Q: Can I create a multi‑frame TIFF where each page becomes a separate frame?
   A: Yes. Set options->set_MultiPageLayout(Aspose::Words::Saving::MultiPageLayout::TiffFrames()); and use SaveFormat::Tiff. Each document page will be stored as an individual frame in the resulting TIFF file.

3. Q: How do I control the resolution (DPI) of the exported images?
   A: Use options->set_Resolution(int dpi);. For example, options->set_Resolution(300); will generate 300 DPI images, which is useful for high‑quality prints.

4. Q: Is it possible to export only a subset of pages, e.g., pages 2‑5?
   A: Yes. Set the PageRange property: options->set_PageRange(Aspose::Words::Saving::PageRange(2, 5));. The export will include only the specified pages using the chosen layout.

5. Q: How can I change the background color of the exported image pages?
   A: Access the layout object via options->get_PageLayout() and call set_BackColor. Example: options->get_PageLayout()->set_BackColor(System::Drawing::Color::get_White());. This color fills the area around each page when using grid‑type layouts.