Aspose.Slides FOSS
C++
How to Add Images to PowerPoint Slides in C++

How to Add Images to PowerPoint Slides in C++

Images in Aspose.Slides FOSS are embedded as picture frames, shapes that hold an image and can be positioned, resized, and styled like any other shape. The image data is stored once in the prs.images() collection and referenced by the frame.

Prerequisites 

git clone https://github.com/aspose-slides-foss/Aspose.Slides-FOSS-for-Cpp.git
cd Aspose.Slides-FOSS-for-Cpp && mkdir build && cd build
cmake .. && cmake --build .

Add an Image from a File 

#include <Aspose/Slides/Foss/presentation.h>
#include <fstream>
#include <vector>

int main() {
    namespace asf = Aspose::Slides::Foss;

    asf::Presentation prs;
    auto& slide = prs.slides()[0];

    // Load image into the presentation's image collection
    std::ifstream file("photo.jpg", std::ios::binary);
    std::vector<uint8_t> data((std::istreambuf_iterator<char>(file)),
                               std::istreambuf_iterator<char>());
    auto& img = prs.images().add_image(data);

    // Add a picture frame at (x=50, y=50, width=400, height=300) in points
    slide.shapes().add_picture_frame(
        asf::ShapeType::RECTANGLE, 50, 50, 400, 300, img);

    prs.save("with-image.pptx", asf::SaveFormat::PPTX);
    return 0;
}

The add_picture_frame signature:

add_picture_frame(shape_type, x, y, width, height, image) -> PictureFrame&

All dimensions are in points (1 point = 1/72 inch). For a standard 10 x 7.5 inch slide the coordinate space is 720 x 540 points.

Add an Image from a Memory Buffer

If you already have the image as bytes (e.g., downloaded from a network or read from a database):

#include <Aspose/Slides/Foss/presentation.h>
#include <vector>

int main() {
    namespace asf = Aspose::Slides::Foss;

    // Assume image_bytes is populated from some source
    std::vector<uint8_t> image_bytes = /* ... */;

    asf::Presentation prs;
    auto& img = prs.images().add_image(image_bytes);

    prs.slides()[0].shapes().add_picture_frame(
        asf::ShapeType::RECTANGLE, 200, 100, 300, 200, img);
    prs.save("logo-slide.pptx", asf::SaveFormat::PPTX);
    return 0;
}

Control the Fill Mode

The picture_format() on a PictureFrame controls how the image fills the frame bounds:

#include <Aspose/Slides/Foss/presentation.h>
#include <fstream>
#include <vector>

int main() {
    namespace asf = Aspose::Slides::Foss;

    asf::Presentation prs;

    std::ifstream file("texture.png", std::ios::binary);
    std::vector<uint8_t> data((std::istreambuf_iterator<char>(file)),
                               std::istreambuf_iterator<char>());
    auto& img = prs.images().add_image(data);

    auto& frame = prs.slides()[0].shapes().add_picture_frame(
        asf::ShapeType::RECTANGLE, 50, 50, 600, 350, img);

    // STRETCH: scale image to fill the frame exactly (default)
    frame.picture_format().set_picture_fill_mode(asf::PictureFillMode::STRETCH);

    // TILE: repeat the image in a grid pattern
    // frame.picture_format().set_picture_fill_mode(asf::PictureFillMode::TILE);

    prs.save("filled.pptx", asf::SaveFormat::PPTX);
    return 0;
}
PictureFillModeBehaviour
STRETCHScale the image to fill the frame, ignoring aspect ratio
TILERepeat the image as a tiled pattern

Add Multiple Images to Different Slides 

#include <Aspose/Slides/Foss/presentation.h>
#include <fstream>
#include <vector>
#include <string>
#include <filesystem>

int main() {
    namespace asf = Aspose::Slides::Foss;

    std::vector<std::string> image_files = {"slide1.jpg", "slide2.jpg", "slide3.jpg"};

    asf::Presentation prs;
    auto& layout = prs.slides()[0].layout_slide();

    // Ensure enough slides exist
    while (prs.slides().size() < image_files.size()) {
        prs.slides().add_empty_slide(layout);
    }

    for (size_t i = 0; i < image_files.size(); ++i) {
        if (!std::filesystem::exists(image_files[i])) continue;

        std::ifstream file(image_files[i], std::ios::binary);
        std::vector<uint8_t> data((std::istreambuf_iterator<char>(file)),
                                   std::istreambuf_iterator<char>());
        auto& img = prs.images().add_image(data);
        prs.slides()[i].shapes().add_picture_frame(
            asf::ShapeType::RECTANGLE, 0, 0, 720, 540, img);
    }

    prs.save("multi-image.pptx", asf::SaveFormat::PPTX);
    return 0;
}

Count Images in an Existing Presentation 

#include <Aspose/Slides/Foss/presentation.h>
#include <iostream>

int main() {
    namespace asf = Aspose::Slides::Foss;

    asf::Presentation prs("with-image.pptx");
    std::cout << "Presentation contains " << prs.images().size() << " image(s)\n";
    return 0;
}

The prs.images() collection is shared across all slides: the same image bytes are stored once even if the picture frame appears on multiple slides.

See Also