PPTX
Images
Embed pictures, set slide backgrounds, and use image fills on shapes
@office-open/pptx supports embedding images into slides, setting background images, and using images as shape fills.
The data field accepts raw bytes (Uint8Array, ArrayBuffer, Buffer) or a base64 data URL such as data:image/png;base64,.... Data URLs are convenient in JSON payloads and browser environments where no file on disk is available.
Embedding a Picture
import { generatePresentation } from "@office-open/pptx";
{
"slides": [
{
"children": [
{
"picture": {
"x": "1.3cm",
"y": "1.3cm",
"width": "10.6cm",
"height": "7.9cm",
"data": "data:image/png;base64,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",
"type": "png"
}
}
]
}
]
}
{
children: [
{
picture: {
x: "1.3cm",
y: "1.3cm",
width: "10.6cm",
height: "7.9cm",
data: new Uint8Array(fs.readFileSync("photo.png")),
type: "png",
},
},
],
}
Image from URL (Browser)
import { generatePresentation } from "@office-open/pptx";
import * as fs from "node:fs";
const response = await fetch("https://example.com/image.png");
const arrayBuffer = await response.arrayBuffer();
const data = new Uint8Array(arrayBuffer);
// Use in generatePresentation:
generatePresentation({
slides: [
{
children: [
{
picture: {
x: "1.3cm",
y: "1.3cm",
width: "13.2cm",
height: "7.9cm",
data,
type: "png",
},
},
],
},
],
});
Supported Image Types
| Type | Extension | type value |
|---|---|---|
| JPEG | .jpg / .jpeg | "jpg" |
| PNG | .png | "png" |
| GIF | .gif | "gif" |
| BMP | .bmp | "bmp" |
| EMF | .emf | "emf" |
| WMF | .wmf | "wmf" |
Slide Background Image
Set a background image for the entire slide:
{
"slides": [
{
"background": {
"fill": {
"type": "blip",
"data": "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mNkYAAAAAYAAjCB0C8AAAAASUVORK5CYII=",
"imageType": "png"
}
},
"children": []
}
]
}
{
background: {
fill: {
type: "blip",
data: new Uint8Array(fs.readFileSync("background.png")),
imageType: "png",
},
},
children: [
// Your slide content goes on top of the background
],
}
Solid Color Background
{
"slides": [
{
"background": { "fill": "1F4E79" },
"children": []
}
]
}
{
background: { fill: "1F4E79" },
children: [],
}
Gradient Background
{
"slides": [
{
"background": {
"fill": {
"type": "gradient",
"stops": [
{ "position": 0, "color": "0D47A1" },
{ "position": 100, "color": "42A5F5" }
],
"angle": 45
}
},
"children": []
}
]
}
{
background: {
fill: {
type: "gradient",
stops: [
{ position: 0, color: "0D47A1" },
{ position: 100, color: "42A5F5" },
],
angle: 45,
},
},
children: [],
}
Image Fill (Blip Fill) on Shapes
Use an image as a fill for any shape:
{
"slides": [
{
"children": [
{
"shape": {
"x": "1.3cm",
"y": "1.3cm",
"width": "15.9cm",
"height": "10.6cm",
"geometry": "roundRect",
"fill": {
"type": "blip",
"data": "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mNkYAAAAAYAAjCB0C8AAAAASUVORK5CYII=",
"imageType": "png"
},
"textBody": { "text": "Text over image fill" }
}
}
]
}
]
}
{
children: [
{
shape: {
x: "1.3cm",
y: "1.3cm",
width: "15.9cm",
height: "10.6cm",
geometry: "roundRect",
fill: {
type: "blip",
data: new Uint8Array(fs.readFileSync("texture.png")),
imageType: "png",
},
textBody: { text: "Text over image fill" },
},
},
],
}
Picture Options
| Property | Type | Description |
|---|---|---|
x | number | UniversalMeasure | Left position |
y | number | UniversalMeasure | Top position |
width | number | UniversalMeasure | Width |
height | number | UniversalMeasure | Height |
data | Uint8Array | ArrayBuffer | string (data URL) | Image data — bytes or base64 data URL |
type | "png" | "jpg" | "gif" | "bmp" | "emf" | "wmf" | Image format |
name | string | cNvPr display name |
description | string | cNvPr description (accessibility alt text) |
title | string | cNvPr title |
hidden | boolean | Whether the picture is hidden (default false) |