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usage/images.md
233
usage/images.md
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# Images
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## Intro
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To create a `floating` image on top of text:
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Adding images is very simple
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Simply call the `createImage` method:
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```js
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const image = doc.createImage([BUFFER_OF_YOUR_IMAGE]);
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```
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`docx` supports `jpeg`, `jpg`, `bmp`, `gif` and `png`
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Check `demo5.js` for an example
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## Positioning
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Images can be:
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* floating position of images
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* Wrapped around the text
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* Inline
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By default, picture are exported as `INLINE` elements.
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In Word this is found in:
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### Usage
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The `PictureRun` element support various options to define the positioning of the element in the document.
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```js
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interface DrawingOptions {
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position?: PlacementPosition;
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textWrapping?: TextWrapping;
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floating?: Floating;
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}
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```
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can be passed when creating `PictureRun()` for example:
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```js
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const imageData = document.createImage(buffer, 903, 1149);
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new docx.PictureRun(imageData, {
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position: docx.PlacementPosition.FLOATING,
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```ts
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doc.createImage(fs.readFileSync("./demo/images/pizza.gif"), 200, 200, {
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floating: {
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horizontalPosition: {
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relative: HorizontalPositionRelativeFrom.PAGE,
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align: HorizontalPositionAlign.LEFT,
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offset: 1014400,
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},
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verticalPosition: {
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relative: VerticalPositionRelativeFrom.PAGE,
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align: VerticalPositionAlign.TOP,
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offset: 1014400,
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},
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},
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});
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```
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So, the first thing is to define the placement position: `INLINE` or `FLOATING`. Inline is the default one so there is no need to pass drawing options for inline.
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By default with no arguments, its an `inline` image:
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When placement position is FLOATING then we can use two options:
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```ts
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doc.createImage(fs.readFileSync("./demo/images/parrots.bmp"));
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```
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You can also create images manually and add them later:
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```ts
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const image = Media.addImage(doc, fs.readFileSync("./demo/images/pizza.gif"));
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doc.addImage(image);
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```
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## Intro
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Adding images can be done in two ways:
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1. Call the `createImage` method to add the image directly into the `document`:
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```js
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doc.createImage([IMAGE_BUFFER], [WIDTH], [HEIGHT], [POSITION_OPTIONS]);
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```
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2. Create an `image` first, then add it into the `document`:
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```ts
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const image = Media.addImage(doc, [IMAGE_BUFFER]);
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doc.addImage(image);
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```
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`docx` supports `jpeg`, `jpg`, `bmp`, `gif` and `png`
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## Positioning
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> Positioning is the method on how to place the image on the document
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Three types of image positioning is supported:
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- Floating
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- Wrapped around the text
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- Inline
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By default, picture are exported as `Inline` elements.
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### Usage
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Pass `options` into the `[POSITION_OPTIONS]` metioned in the [Intro above](#Intro).
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### Floating
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To change the position the image to be on top of the text, simply add the `floating` property to the last argument. By default, the offsets are relative to the top left corner of the `page`. Offset units are in [emus](https://startbigthinksmall.wordpress.com/2010/01/04/points-inches-and-emus-measuring-units-in-office-open-xml/):
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```ts
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const imageData = document.createImage(buffer, 903, 1149, {
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floating: {
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horizontalPosition: {
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offset: 1014400, // relative: HorizontalPositionRelativeFrom.PAGE by default
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},
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verticalPosition: {
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offset: 1014400, // relative: VerticalPositionRelativeFrom.PAGE by default
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},
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},
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});
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```
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```ts
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const imageData = document.createImage(buffer, 903, 1149, {
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floating: {
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horizontalPosition: {
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relative: HorizontalPositionRelativeFrom.RIGHT_MARGIN,
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offset: 1014400,
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},
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verticalPosition: {
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relative: VerticalPositionRelativeFrom.BOTTOM_MARGIN,
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offset: 1014400,
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},
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},
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});
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```
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#### Options
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Full options you can pass into `floating` are:
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| Property | Type | Notes |
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| ------------------ | --------------------------- | -------- |
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| horizontalPosition | `HorizontalPositionOptions` | Required |
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| verticalPosition | `VerticalPositionOptions` | Required |
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| allowOverlap | `boolean` | Optional |
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| lockAnchor | `boolean` | Optional |
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| behindDocument | `boolean` | Optional |
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| layoutInCell | `boolean` | Optional |
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`HorizontalPositionOptions` are:
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| Property | Type | Notes | Possible Values |
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| -------- | -------------------------------- | ------------------------------------------------- | --------------------------------------------------------------------------------------------------------- |
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| relative | `HorizontalPositionRelativeFrom` | Required | `CHARACTER`, `COLUMN`, `INSIDE_MARGIN`, `LEFT_MARGIN`, `MARGIN`, `OUTSIDE_MARGIN`, `PAGE`, `RIGHT_MARGIN` |
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| align | `HorizontalPositionAlign` | You can either have `align` or `offset`, not both | `CENTER`, `INSIDE`, `LEFT`, `OUTSIDE`, `RIGHT` |
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| offset | `number` | You can either have `align` or `offset`, not both | `0` to `Infinity` |
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`VerticalPositionOptions` are:
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| Property | Type | Notes | Possible Values |
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| -------- | ------------------------------ | ------------------------------------------------- | ------------------------------------------------------------------------------------------------------- |
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| relative | `VerticalPositionRelativeFrom` | Required | `BOTTOM_MARGIN`, `INSIDE_MARGIN`, `LINE`, `MARGIN`, `OUTSIDE_MARGIN`, `PAGE`, `PARAGRAPH`, `TOP_MARGIN` |
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| align | `VerticalPositionAlign` | You can either have `align` or `offset`, not both | `BOTTOM`, `CENTER`, `INSIDE`, `OUTSIDE`, `TOP` |
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| offset | `number` | You can either have `align` or `offset`, not both | `0` to `Infinity` |
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### Wrap text
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!> **In progress** Documentation may potentially be changing
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for `drawingOptions.textWrapping` we can define various options. `textWrapping` has the following properties:
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```js
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@ -90,67 +154,20 @@ enum WrapTextOption {
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}
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```
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### Floating position
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## Examples
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When we want to position the image relative or absolute then we need to use option `drawingOptions.floating`:
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### Add image to the document
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```js
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export interface Floating {
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horizontalPosition: HorizontalPositionOptions;
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verticalPosition: VerticalPositionOptions;
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allowOverlap?: boolean;
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lockAnchor?: boolean;
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behindDocument?: boolean;
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layoutInCell?: boolean;
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}
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Importing Images from file system path
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export interface HorizontalPositionOptions {
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relative: HorizontalPositionRelativeFrom;
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align?: HorizontalPositionAlign;
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offset?: number;
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}
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[Example](https://raw.githubusercontent.com/dolanmiu/docx/master/demo/demo5.ts ":include")
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export interface VerticalPositionOptions {
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relative: VerticalPositionRelativeFrom;
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align?: VerticalPositionAlign;
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offset?: number;
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}
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_Source: https://github.com/dolanmiu/docx/blob/master/demo/demo5.ts_
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export enum HorizontalPositionRelativeFrom {
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CHARACTER = "character",
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COLUMN = "column",
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INSIDE_MARGIN = "insideMargin",
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LEFT_MARGIN = "leftMargin",
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MARGIN = "margin",
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OUTSIDE_MARGIN = "outsideMargin",
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PAGE = "page",
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RIGHT_MARGIN = "rightMargin",
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}
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### Add images to header and footer
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export enum VerticalPositionRelativeFrom {
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BOTTOM_MARGIN = "bottomMargin",
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INSIDE_MARGIN = "insideMargin",
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LINE = "line",
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MARGIN = "margin",
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OUTSIDE_MARGIN = "outsideMargin",
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PAGE = "page",
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PARAGRAPH = "paragraph",
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TOP_MARGIN = "topMargin",
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}
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Example showing how to add image to headers and footers
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export enum HorizontalPositionAlign {
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CENTER = "center",
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INSIDE = "inside",
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LEFT = "left",
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OUTSIDE = "outside",
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RIGHT = "right",
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}
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[Example](https://raw.githubusercontent.com/dolanmiu/docx/master/demo/demo9.ts ":include")
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export enum VerticalPositionAlign {
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BOTTOM = "bottom",
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CENTER = "center",
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INSIDE = "inside",
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OUTSIDE = "outside",
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TOP = "top",
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}
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```
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_Source: https://github.com/dolanmiu/docx/blob/master/demo/demo9.ts_
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