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

How to Add Images to PowerPoint Slides in C++

This guide shows how to embed images into PowerPoint slides using Aspose.Slides FOSS for C++. Load image data into prs.images().add_image(), then call slide.shapes().add_picture_frame() to position the image on the slide. All dimensions are in points (1 point = 1/72 inch).

Prerequisites

Clone the repository and build with CMake to produce the static library to link against:

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

Load image bytes from a file into prs.images().add_image(), then call slide.shapes().add_picture_frame() with the target position and size in points:

#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 method signature accepts shape type, position, dimensions, and image reference:

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

Add a picture frame to each slide by iterating over a list of image file paths and calling add_picture_frame() on each slide in the collection:

#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

Load an existing presentation and read prs.images().size() to count the total number of images stored in the collection:

#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

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