A one or two dimensional layered texture is a texture made up of sequence of layers, all of which are regular textures of same dimensionality, size and data type.
How to create layered texture in OpenCL ?
Not very sure about the question here. But probably you can look in 3D cl_images using clCreateImage API in the OpenCL spec.
Ok Guys, Please do not get mad as i am bringing the reference of CUDA here. I started to learn about GPGPU programming with CUDA and trying to map the issues here in OpenCL.
In CUDA there are two types of device memory , linear memory and CUDA arrays.
1. Linear Memory - used for normal data. This is the region of consecutive addresses in device memory. And they are accessed via pointers
2. CUDA array - used for textures.
In OpenCL , device memory is also categorized in the same manner i guess.
1. Linear memory created with clCreateBuffer().
2. For texturing operation we use clCreateImage2D()/clCreateImage3D().
Now 3D are to be represented in the linear manner as follows :
char *buffer = new char[width * height * depth *4];
What to use there clCreateBuffer or clCreateImage3D() ?
The same questions applies in the 2D case as well.
I think if there is no texturing operation involved then stay with clCreateBuffer instead. What do you think ?
The confusion arises because CUDA provides support for 3D object to be represented in a linear manner with cudaMalloc3D().
Looking forward to you feedback over this issue.
Not sure how cudaMalloc3D is helpful, but I use clImages for performance reasons. They are expected to perform better, when you have tiled access pattern for your algorithm. Check AMD OpenCL Programming Guide for details.
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