March 2006
Intermediate to advanced
352 pages
7h 42m
English
Content preview from Quartz 2D Graphics for Mac OS X® DevelopersBecome 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 8. Image Basics
In introducing Quartz 2D, and throughout the book up to this point, the fact that Quartz 2D has a resolution independent drawing model has been emphasized. It has also been pointed out that Quartz 2D does not, in general, base its drawing model on the concept of a pixel. However, computer graphics is riddled with resolution dependent graphics that are pixel-based. One of the most popular examples today are the images captured by digital cameras. The digital camera works by capturing light and generating a set of color pixels that closely match what it “sees.”
To draw pixel-based graphics, like the images from a digital camera, Core Graphics needs some way to model those graphics. The Quartz 2D API uses the concept of an ...
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