problem about image-formats-Collection of common programming errors

• 
  Stals
  opengl-es format webgl image-formats
  on opengl (webgl more specifically) for textures, which format between jpeg and png would be recommended as more efficient at runtime rendering? I understand jpeg can be smaller than PNG, but perhaps decoding can be more costly, or otherwise.
• 
  madflame991
  opencl image-formats
  I need to do some operations on a matrix of values that take at most one byte (values form 0 to 20 most likely). Since the matrix is rather large I figured I’d do these operations on the GPU using OpenCL and storing the matrix as an image. The thing is that I failed to find any hints to whether OpenCL has support for single channel images… and I wouldn’t want to pass around more data than I actually use.Is there any support for single channel images?

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