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using GLSL, handling buffers and states transparently. Although GPU rendering is preferred, the compiler can operate in a CPU fallback mode, generating commands suitable for the current CPU architecture instead. CPU fallback uses the vector processing capabilities of the current CPU or CPUs, and it is multi-processor aware. Thus, Core Image performance depends on the GLSL capabilities of the GPU or the processing power of the CPU. With a supported GPU, most effects can be rendered in realtime or near-realtime.

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