January 2003
Intermediate to advanced
424 pages
8h 1m
English
Content preview from Real-Time Shader Programming
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Part II
Pixel Shader Reference
QUICK OVERVIEW
Just as vertex shaders operate on a single vertex, pixel shaders operate on a single pixel. Pixel shaders’ instructions break down into two categories: those that work on the color and alpha blending and those that work on texture addressing. Generally you can perform a color and/or alpha blending operation or a texture addressing operation with a single pixel shader instruction.
While vertex shaders are straight forward, pixel shaders are a bit more idiosyncratic since they more closely mimic the underlying hardware, and the hardware is evolving. Pixel shader versions 1.0 though 1.3 tend to show the influence of hardware manufactured by NVIDIA, while version 1.4 exposes the way the ATI hardware ...
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