CODEWITHSUNDEEP
iphoneopengl-es
Chatar Veer Suthar
Chatar Veer Suthar

Reputation: 15639

how to texture of images?

I am using too many fruits and vegetables images in iphone game, so how can I make texture of such images, because as per I read that every image in texture in OpenGL ES, so what should I do?

I have developed 6 iOS application, but this is my first game, so please guide me in proper way so that I can get idea.

Upvotes: 1

Views: 157

Answers (1)

Tommy
Tommy

Reputation: 100602

You use glTexImage2D to upload raw pixel data to OpenGL in order to populate a texture. You can use Core Graphics and particularly CGBitmapContextCreate to get the raw pixel data to get the raw pixel data of (or convert to raw pixel data) anything else Core Graphics can draw — which for you probably means a CGImageRef, either through a C API load of a PNG or JPG, or just using the result of [someUIImage CGImage].

Apple's GLSprite sample (you'll need to be logged in, and I'm not sure those links work externally, but do a search in the Developer Library if necessary) is probably a good starting point. I'm not 100% behind the class structure, but if you look into EAGLView.m, lines 272 to 305, the code there loads a PNG from disk then does the necessary steps to post it off to OpenGL, with a decent amount of commenting.

Upvotes: 1

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