November 2011
Intermediate to advanced
384 pages
13h 23m
English
Content preview from HTML5: Your visual blueprint™ for designing rich web pages and applications
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CROP A CANVAS IMAGE
You can crop an image before drawing it into the canvas using a similar procedure to the one described in the section “Draw an Image on the Canvas,” except this time you must specify four more parameters to the drawImage() method:
context.drawImage(image, srcX, srcY, srcW, srcH, destX, destY, destW, destH);
srcX, srcY, srcW, and srcH specify the region of the source image that you are copying from. Likewise, destX, destY, destW, and destH specify the region of the canvas you are copying to. If srcW and srcH do not equal destW and destH, the cropped image will also be scaled.
EXTRA
A sprite sheet is a single image file that contains multiple frames of the same object at various animation states.
This sprite sheet contains ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
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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