> For the complete documentation index, see [llms.txt](https://docs.emobiq.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.emobiq.com/emobiq-client/006-actions-and-visual-logic/action-reference/cordova/app/canvasgeneratefrom.md).

# canvasGenerateFrom

## Description

Converts a file data to a canvas, canvas are mainly used for printing.

### Platform Supported

* Web
* Mobile

## Input / Parameter

| Name         | Description                                                                                | Data Type      | Default | Options          | Required |
| ------------ | ------------------------------------------------------------------------------------------ | -------------- | ------- | ---------------- | -------- |
| type         | The data type of the file to be converted, basically what is the data type of the 'value'. | Text           | base64  | base64           | No       |
| value        | The data of the file to be converted.                                                      | Any            | -       | -                | Yes      |
| fileType     | The file type of the file to be converted, basically what is the file type of the 'value'. | Text           | image   | image, pdf       | No       |
| documentSize | If the 'fileType' is 'pdf', this parameter is used to scale the size appropriately.        | Text or Number | -       | a4, {Any Number} | No       |

## Output

| Description                                               | Output Type |
| --------------------------------------------------------- | ----------- |
| Returns 'true' or 'false', based on the execution status. | Boolean     |

## Callback

### callback

The function to be executed when the canvas is generated successfully.

| Description              | Output Type                                                                           |
| ------------------------ | ------------------------------------------------------------------------------------- |
| Returns the html canvas. | [HTMLCanvasElement](https://developer.mozilla.org/en-US/docs/Web/HTML/Element/canvas) |

### errCallback

The function to be executed when the canvas is not generated.

| Description        | Output Type |
| ------------------ | ----------- |
| Returns the error. | Text/Object |