CODEWITHSUNDEEP
iphoneobjective-ccocoaimagegraphics
rui
rui

Reputation: 11284

How can I multiply an image against the alpha of another image in Cocoa?

Having loaded two different images I want to do the following operation and obtain image3.

image1.red * image2.alpha = image3.red
image1.green * image2.alpha = image3.green
image1.blue * image2.alpha = image3.blue

I wrote the code in the link below for Android and was basically looking for the same functionality in Objective-C/Cocoa.
http://www.ruibm.com/?p=184

Thanks, Rui

Upvotes: 0

Views: 202

Answers (1)

Azeem.Butt
Azeem.Butt

Reputation: 5861

Draw a rounded rectangle path and clip your image with it.

http://developer.apple.com/mac/library/documentation/GraphicsImaging/Conceptual/drawingwithquartz2d/dq_images/dq_images.html#//apple_ref/doc/uid/TP30001066-CH212-CJBHBCGB

Upvotes: 1

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