GPU Pro 5

3

III

BokehEffectsontheSPU

Serge Bernier

3.1 Introduction

Graphics programmers work hard to spend their per-frame millisecond budget

wisely—by ensuring the color buffer gamma is correct, using a true high dynamic

range pipeline, or trying to have the best antialiasing technique possible. There-

fore it can be surprising to actually spend more milliseconds to produce a blurred

image! Many games use depth of field (DOF) to focus the player’s attention on a

particular part of the frame, as well as to reinforce the depth illusion in the ren-

dered image. Depth of field has a natural home in cutscenes, which typically have

a more cinematographic feel, using framing ...