November 2011
Intermediate to advanced
348 pages
7h 2m
English
Content preview from HTML5 Canvas CookbookBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Chapter 3. Working with Images and Videos
In this chapter, we will cover:
- Drawing an image
- Cropping an image
- Copying and pasting sections of the canvas
- Working with video
- Getting image data
- Introduction to pixel manipulation: inverting image colors
- Inverting video colors
- Converting image colors to grayscale
- Converting a canvas drawing into a data URL
- Saving a canvas drawing as an image
- Loading the canvas with a data URL
- Creating a pixelated image focus
Introduction
This chapter focuses on yet another very exciting topic of the HTML5 canvas, images and videos. Along with providing basic functionality for positioning, sizing, and cropping images and videos, the HTML5 canvas API also allows us to access and modify the color and transparency of each pixel for both ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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