What is the method for converting a canvas to a jpg file in Ionic?

I am trying to save a canvas as a jpg image using two different methods. Method A involves converting the canvas data to base64 and then creating a blob to save the image, while Method 2 also converts the data to base64 but uses a custom function to create the blob.

However, both methods are not working as expected. The console output shows that the conversion from base64 to blob is failing in both cases, resulting in a blob size of 0.

If anyone has a working example or solution for saving a canvas as a jpg image, please share it. Any help would be greatly appreciated.

javascripttypescriptionic-frameworkhtml5-canvas

Answer №1

Is it possible to achieve this using the toBlob method from the Canvas context?

bufferCanvas.toBlob( imageBlob => {

  const saveOptions: IWriteOptions = { overwrite: true };

  this.file.saveFile(this.file.dataDirectory, fileName, imageBlob)
  .then(() => {
      this.updateCanvas();
      this.updateInformation();
      console.log("openCamera > saveFile: Successful");
  }, error => {
      console.log('openCamera > saveFile error: ', error);
  });

},"image/jpeg", 0.80);

Similar questions

If you have not found the answer to your question or you are interested in this topic, then look at other similar questions below or use the search

Looking for assistance with integrating Elasticsearch with a React.js project

Hello there, I could use some assistance with integrating the Elasticsearch engine into my search application. Currently, I have successfully sent data from Kibana to Elasticsearch for indexing. However, I am facing a challenge in adding the search functio ...

javascriptnode.jsreactjselasticsearchkibana

Using ajax to submit a request to the controller

I'm currently developing an ASP.NET Core MVC application and have a registration page set up. My goal is to return View with errors if the model state is false: @model WebApplication2PROP.Entities.UserRegister @* For more information on enabling M ...

javascriptjqueryajaxasp.net-mvcasp.net-core

Issue: Trouble with Angular Routing linking to Express backend for templateUrl

I'm experiencing a problem with displaying a partial using angular routing and express. I'm trying to configure it so that I can still use pug (previously jade) to write short-form html. Everything seems to be set up correctly with no errors, and ...

javascriptangularjsnode.jsexpress

Encountering an error stating 'ReadableStream is not defined' while attempting to log in using Discord on the NextAuth application

While attempting to set up a Discord sign-in page to test NextAuth on my website, I encountered the error ReferenceError: ReadableStream is not defined. After examining the stack trace, it seems to be related to how my packages are configured, but I' ...

javascriptnext.jsnext-auth

Fetching the Three.js mesh from the loader outside the designated area

Currently, I am immersed in a project that involves Three.js. The challenge I am facing is trying to access the mesh (gltf.scene) in the GLTF load from an external source. However, whenever I attempt to console.log outside of the loader, it shows up as und ...

javascriptasynchronousmodulethree.jsgltf

Issue encountered during rendering: The function used is not a filter

Everything works fine with the search filter and pagination on the initial load. However, upon clicking to go to the next page, an error occurs stating **'Error in render: "TypeError: this.tickets.filter is not a function"'**. This issue can b ...

javascriptvue.jsvuejs2

Ways to disable an element

How can I prevent a <form:input type="text" path="lateTimeValue" disabled="true" id="lateTime" /> element from sending its value to the server when disabled? What steps should I take to ensure the value is not passed to the server upon submissio ...

javascriptjqueryform-submit

How can I apply jQuery styling to ajax content that has been loaded?

After setting up most of the content properly, I am now facing a challenge in styling a select dropdown using the following script: The styling code is as follows: $(function () { $("#select").selectbox(); }); I am wondering how to apply the following c ...

javascriptjqueryajax

programming for the final radio button text entry

I am struggling with a form that has 5 radio buttons, including an "other" option where users can manually enter text. The issue I'm facing is that the form only returns the manual entry text and not any of the preset radio values. I need it to work f ...

javascripthtmltextradio-buttonvar

Throttle the RxJs interval based on the inner observables

Sorry if the way I am asking this question is not clear, I am having difficulty finding the right words to explain it. I am currently working on Selenium automation and here is how the process goes:- Go to a specific page Every 1 second, check if the pag ...

javascriptseleniumrxjs

Angular 5 (ionic 3) does not support the FormControl debounceTime feature

Recently, I upgraded Angular in my Ionic app from version 4 to 5. In the app, I have search FormControl inputs that allow users to search a database through ajax requests. Previously, I used the debounceTime() method to delay the ajax search request. Howev ...

angulartypescriptionic-frameworkrxjsionic3

Using Angular 9 to implement two distinct layouts within a single application

In my application, there are two distinct layouts. One layout features the top navigation bar and a sidebar. <app-nav></app-nav> <div> <app-sidebar></app-sidebar> <router-outlet></router-outlet> </div> T ...

javascriptangularrouter

Download and print the embedded PDF file

I am having trouble figuring out how to add 2 external buttons to print and save an embedded pdf on my webpage. Despite searching Google for hours, I have not been able to find a solution that works. The embedded object already has buttons for printing and ...

javascriptjqueryhtmlpdf

Modify the color of the 'li' element that shares the same attribute value as the current page

I am in the process of creating a website for an architecture company. Currently, I am working on a specific page which you can find here: . Each project falls into a category such as residential, commercial, or education. On each project page, I include t ...

javascriptjqueryhtmlcss

Is combining a string and a React element within the same array considered acceptable in the world of React?

Consider a scenario where you need to display data in the form of string[][]. Here is the code snippet: export interface IProps { correctAnswers: string[][]; } public render(): JSX.Element { return ( <div> {this.props.c ...

reactjstypescript

Steps to activate a modal window using a double click occurrence within a reactable table

My goal is to initiate a modal window by double-clicking on a cell within a reactable table. Additionally, I need the row index to display an image specific to the clicked row in the modal. The code below successfully triggers a window.alert when a double ...

javascriptrshinyreactable

Looking to convert a jQuery function to plain JavaScript code?

Struggling with my homework, I must apologize for any mistakes in my English. My task involves creating a chat using node.js and I found some code snippets on a website "" which I used successfully. The issue now is that the chat relies on old jQuery libr ...

javascriptjquerynode.jsexpresssocket.io

Encountering the error message "XMLHttpRequest is not defined"

I am encountering an issue where XMLHttpRequest is not defined while attempting to use it for the first time. I am trying to retrieve data from an API URL using .open('GET'). var weatherData; var request = new XMLHttpRequest(); loadData(); f ...

javascriptjsonxml

How can I prevent the browser's back button from functioning on an AngularJS webpage?

Is there a way to disable the browser's back button and refresh button in Angular? For example, in my source code: Page Source: "use strict"; .controller("wizardSecondController", function($scope, $state, $stateParams, wizardManager) { $scope.$on ...

javascriptjqueryangularjs

assert.deepPartiallyEqual method designed for comparing two objects in an asymmetric manner

I've been struggling to come up with suitable names for this function, but let me explain what I'm looking for: I need an assertion function similar to assert.deepEqual(obj1, obj2), but instead of recursively comparing obj1 with obj2, it should ...

javascriptnode.jsunit-testingassert