Writing to a textures using iphone

Questions & Answers
1

I am building an iOS application in which you can paint lines using your finger. To do so I am using a read/write texture, which I update every frame.

I just set a block of pixels and then call Apply()

I am getting poor performance, how could I solve that? Is there another way to do so?

Thank You.

2

Uploading textures to the GPU every frame is an inherently slow process, especially for large textures. You could try breaking it up into a number of smaller textures, and upload only the ones that change.